/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* @OSF_COPYRIGHT@
*/
-/*
- * Low-memory exception vector code for PowerPC MACH
- *
- * These are the only routines that are ever run with
- * VM instruction translation switched off.
- *
- * The PowerPC is quite strange in that rather than having a set
- * of exception vectors, the exception handlers are installed
- * in well-known addresses in low memory. This code must be loaded
- * at ZERO in physical memory. The simplest way of doing this is
- * to load the kernel at zero, and specify this as the first file
- * on the linker command line.
- *
- * When this code is loaded into place, it is loaded at virtual
- * address KERNELBASE, which is mapped to zero (physical).
- *
- * This code handles all powerpc exceptions and is always entered
- * in supervisor mode with translation off. It saves the minimum
- * processor state before switching back on translation and
- * jumping to the approprate routine.
- *
- * Vectors from 0x100 to 0x3fff occupy 0x100 bytes each (64 instructions)
- *
- * We use some of this space to decide which stack to use, and where to
- * save the context etc, before jumping to a generic handler.
- */
-
#include <assym.s>
#include <debug.h>
-#include <cpus.h>
#include <db_machine_commands.h>
-#include <mach_rt.h>
#include <mach_debug.h>
#include <ppc/asm.h>
#include <ppc/proc_reg.h>
#include <ppc/exception.h>
#include <ppc/Performance.h>
+#include <ppc/savearea.h>
#include <mach/ppc/vm_param.h>
-#include <ppc/POWERMAC/mp/MPPlugIn.h>
-#define TRCSAVE 0
-#define CHECKSAVE 0
-#define PERFTIMES 0
#define ESPDEBUG 0
+#define INSTRUMENT 0
-#if TRCSAVE
-#error The TRCSAVE option is broken.... Fix it
-#endif
-
-#define featL1ena 24
-#define featSMP 25
-#define featAltivec 26
-#define wasNapping 27
-#define featFP 28
+#define featAltivec 29
+#define wasNapping 30
#define VECTOR_SEGMENT .section __VECTORS, __interrupts
VECTOR_SEGMENT
+ .globl EXT(lowGlo)
+EXT(lowGlo):
- .globl EXT(ExceptionVectorsStart)
+ .globl EXT(ExceptionVectorsStart)
EXT(ExceptionVectorsStart): /* Used if relocating the exception vectors */
baseR: /* Used so we have more readable code */
-/*
- * System reset - call debugger
- */
+;
+; Handle system reset.
+; We do not ever expect a hard reset so we do not actually check.
+; When we come here, we check for a RESET_HANDLER_START (which means we are
+; waking up from sleep), a RESET_HANDLER_BUPOR (which is using for bring up
+; when starting directly from a POR), and RESET_HANDLER_IGNORE (which means
+; ignore the interrupt).
+;
+; Some machines (so far, 32-bit guys) will always ignore a non-START interrupt.
+; The ones who do take it, check if the interrupt is too be ignored. This is
+; always the case until the previous reset is handled (i.e., we have exited
+; from the debugger).
+;
. = 0xf0
.globl EXT(ResetHandler)
EXT(ResetHandler):
mtlr r4
blr
-resetexc:
- mtcr r11
+resetexc: cmplwi r13,RESET_HANDLER_BUPOR ; Special bring up POR sequence?
+ bne resetexc2 ; No...
+ lis r4,hi16(EXT(resetPOR)) ; Get POR code
+ ori r4,r4,lo16(EXT(resetPOR)) ; The rest
+ mtlr r4 ; Set it
+ blr ; Jump to it....
+
+resetexc2: cmplwi cr1,r13,RESET_HANDLER_IGNORE ; Are we ignoring these? (Software debounce)
+
+ mfsprg r13,0 ; Get per_proc
+ lwz r13,pfAvailable(r13) ; Get the features
+ rlwinm. r13,r13,0,pf64Bitb,pf64Bitb ; Is this a 64-bit machine?
+ cror cr1_eq,cr0_eq,cr1_eq ; See if we want to take this
+ bne-- cr1,rxCont ; Yes, continue...
+ bne-- rxIg64 ; 64-bit path...
+
+ mtcr r11 ; Restore the CR
+ mfsprg r13,2 ; Restore R13
+ mfsprg r11,0 ; Get per_proc
+ lwz r11,pfAvailable(r11) ; Get the features
+ mtsprg 2,r11 ; Restore sprg2
+ mfsprg r11,3 ; Restore R11
+ rfi ; Return and ignore the reset
+
+rxIg64: mtcr r11 ; Restore the CR
+ mfsprg r11,0 ; Get per_proc
+ mtspr hsprg0,r14 ; Save a register
+ ld r14,UAW(r11) ; Get the User Assist DoubleWord
+ mfsprg r13,2 ; Restore R13
+ lwz r11,pfAvailable(r11) ; Get the features
+ mtsprg 2,r11 ; Restore sprg2
+ mfsprg r11,3 ; Restore R11
+ mtsprg 3,r14 ; Set the UAW in sprg3
+ mfspr r14,hsprg0 ; Restore R14
+ rfid ; Return and ignore the reset
+
+rxCont: mtcr r11
+ li r11,RESET_HANDLER_IGNORE ; Get set to ignore
+ stw r11,lo16(EXT(ResetHandler)-EXT(ExceptionVectorsStart)+RESETHANDLER_TYPE)(br0) ; Start ignoring these
mfsprg r13,1 /* Get the exception save area */
li r11,T_RESET /* Set 'rupt code */
b .L_exception_entry /* Join common... */
. = 0x200
.L_handler200:
- mtsprg 2,r13 /* Save R13 */
- mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
- li r11,T_MACHINE_CHECK /* Set 'rupt code */
- b .L_exception_entry /* Join common... */
+ mtsprg 2,r13 ; Save R13
+ mtsprg 3,r11 ; Save R11
+
+ .globl EXT(extPatchMCK)
+LEXT(extPatchMCK) ; This is patched to a nop for 64-bit
+ b h200aaa ; Skip 64-bit code...
+
+;
+; Fall through here for 970 MCKs.
+;
+
+ li r11,1 ; ?
+ sldi r11,r11,32+3 ; ?
+ mfspr r13,hid4 ; ?
+ or r11,r11,r13 ; ?
+ sync
+ mtspr hid4,r11 ; ?
+ isync
+ li r11,1 ; ?
+ sldi r11,r11,32+8 ; ?
+ andc r13,r13,r11 ; ?
+ lis r11,0xE000 ; Get the unlikeliest ESID possible
+ sync
+ mtspr hid4,r13 ; ?
+ isync ; ?
+
+ srdi r11,r11,1 ; ?
+ slbie r11 ; ?
+ sync
+ isync
+
+ li r11,T_MACHINE_CHECK ; Set rupt code
+ b .L_exception_entry ; Join common...
+
+;
+; Preliminary checking of other MCKs
+;
+
+h200aaa: mfsrr1 r11 ; Get the SRR1
+ mfcr r13 ; Save the CR
+
+ rlwinm. r11,r11,0,dcmck,dcmck ; ?
+ beq+ notDCache ; ?
+
+ sync
+ mfspr r11,msscr0 ; ?
+ dssall ; ?
+ sync
+ isync
+
+ oris r11,r11,hi16(dl1hwfm) ; ?
+ mtspr msscr0,r11 ; ?
+
+rstbsy: mfspr r11,msscr0 ; ?
+
+ rlwinm. r11,r11,0,dl1hwf,dl1hwf ; ?
+ bne rstbsy ; ?
+
+ sync ; ?
+
+ mfsprg r11,0 ; Get the per_proc
+ mtcrf 255,r13 ; Restore CRs
+ lwz r13,hwMachineChecks(r11) ; Get old count
+ addi r13,r13,1 ; Count this one
+ stw r13,hwMachineChecks(r11) ; Set new count
+ lwz r11,pfAvailable(r11) ; Get the feature flags
+ mfsprg r13,2 ; Restore R13
+ mtsprg 2,r11 ; Set the feature flags
+ mfsprg r11,3 ; Restore R11
+ rfi ; Return
+
+notDCache: mtcrf 255,r13 ; Restore CRs
+ li r11,T_MACHINE_CHECK ; Set rupt code
+ b .L_exception_entry ; Join common...
+
/*
* Data access - page fault, invalid memory rights for operation
.L_handler300:
mtsprg 2,r13 /* Save R13 */
mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
li r11,T_DATA_ACCESS /* Set 'rupt code */
b .L_exception_entry /* Join common... */
+
+/*
+ * Data segment
+ */
+
+ . = 0x380
+.L_handler380:
+ mtsprg 2,r13 ; Save R13
+ mtsprg 3,r11 ; Save R11
+ li r11,T_DATA_SEGMENT ; Set rupt code
+ b .L_exception_entry ; Join common...
+
/*
* Instruction access - as for data access
*/
. = 0x400
.L_handler400:
- mtsprg 2,r13 /* Save R13 */
- mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
- li r11,T_INSTRUCTION_ACCESS /* Set 'rupt code */
- b .L_exception_entry /* Join common... */
+ mtsprg 2,r13 ; Save R13
+ mtsprg 3,r11 ; Save R11
+ li r11,T_INSTRUCTION_ACCESS ; Set rupt code
+ b .L_exception_entry ; Join common...
+
+/*
+ * Instruction segment
+ */
+
+ . = 0x480
+.L_handler480:
+ mtsprg 2,r13 ; Save R13
+ mtsprg 3,r11 ; Save R11
+ li r11,T_INSTRUCTION_SEGMENT ; Set rupt code
+ b .L_exception_entry ; Join common...
/*
* External interrupt
. = 0x500
.L_handler500:
- mtsprg 2,r13 /* Save R13 */
- mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
- li r11,T_INTERRUPT /* Set 'rupt code */
- b .L_exception_entry /* Join common... */
+ mtsprg 2,r13 ; Save R13
+ mtsprg 3,r11 ; Save R11
+ li r11,T_INTERRUPT ; Set rupt code
+ b .L_exception_entry ; Join common...
/*
* Alignment - many reasons
.L_handler600:
mtsprg 2,r13 /* Save R13 */
mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
- li r11,T_ALIGNMENT /* Set 'rupt code */
+ li r11,T_ALIGNMENT|T_FAM /* Set 'rupt code */
b .L_exception_entry /* Join common... */
/*
.L_handler700:
mtsprg 2,r13 /* Save R13 */
mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
- li r11,T_PROGRAM /* Set 'rupt code */
+
+#if 0
+ mfsrr1 r13 ; (BRINGUP)
+ mfcr r11 ; (BRINGUP)
+ rlwinm. r13,r13,0,12,12 ; (BRINGUP)
+ crmove cr1_eq,cr0_eq ; (BRINGUP)
+ mfsrr1 r13 ; (BRINGUP)
+ rlwinm. r13,r13,0,MSR_PR_BIT,MSR_PR_BIT ; (BRINGUP)
+ crorc cr0_eq,cr1_eq,cr0_eq ; (BRINGUP)
+ bf-- cr0_eq,. ; (BRINGUP)
+ mtcrf 255,r11 ; (BRINGUP)
+#endif
+
+ li r11,T_PROGRAM|T_FAM /* Set 'rupt code */
b .L_exception_entry /* Join common... */
/*
.L_handler800:
mtsprg 2,r13 /* Save R13 */
mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
li r11,T_FP_UNAVAILABLE /* Set 'rupt code */
b .L_exception_entry /* Join common... */
.L_handler900:
mtsprg 2,r13 /* Save R13 */
mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
li r11,T_DECREMENTER /* Set 'rupt code */
b .L_exception_entry /* Join common... */
.L_handlerA00:
mtsprg 2,r13 /* Save R13 */
mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
li r11,T_IO_ERROR /* Set 'rupt code */
b .L_exception_entry /* Join common... */
.L_handlerB00:
mtsprg 2,r13 /* Save R13 */
mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
li r11,T_RESERVED /* Set 'rupt code */
b .L_exception_entry /* Join common... */
-/*
- * System call - generated by the sc instruction
- */
+
+; System Calls (sc instruction)
+;
+; The syscall number is in r0. All we do here is munge the number into an
+; 8-bit index into the "scTable", and dispatch on it to handle the Ultra
+; Fast Traps (UFTs.) The index is:
+;
+; 0x80 - set if syscall number is 0x80000000 (CutTrace)
+; 0x40 - set if syscall number is 0x00006004
+; 0x20 - set if upper 29 bits of syscall number are 0xFFFFFFF8
+; 0x10 - set if upper 29 bits of syscall number are 0x00007FF0
+; 0x0E - low three bits of syscall number
+; 0x01 - zero, as scTable is an array of shorts
. = 0xC00
.L_handlerC00:
mtsprg 3,r11 ; Save R11
mtsprg 2,r13 ; Save R13
- mfcr r11 ; Save the CR
-
-; Note: this first compare takes care of almost all of the non-fast paths
-; BSD system calls are negative and, platform-specific and mach system
-; calls are all less than 0x7000.
-;
-; Note that 0x7FF2 and 0x7FF3 are user state only and do not need to set sprg2.
-
- cmpwi r0,0x7FF2 ; Ultra fast path cthread info call?
- blt+ notufp ; Not ultra fast...
- mfsprg r13,0 ; Get the per_proc_area
- cmplwi cr1,r0,0x7FF4 ; Ultra fast path fp/vec facility state?
- bgt+ cr1,notufp ; Not ultra fast...
- beq+ cr1,scloadmsr ; It is the load msr guy...
- lwz r13,spcFlags(r13) ; Get the facility status
- rlwinm. r13,r13,0,runningVMbit,runningVMbit ; Are we running a VM right now?
- bne- notufp ; Yes, no fast trap allowed...
-
- mfsprg r11,3 ; Restore R11
- mfsprg r3,0 ; Get the per_proc_area
- mfsprg r13,2 ; Restore R13
- beq- cr1,isvecfp ; This is the facility stat call
- lwz r3,UAW(r3) ; Get the assist word
- rfi ; All done, scream back... (no need to restore CR or R11, they are volatile)
-;
-isvecfp: lwz r3,spcFlags(r3) ; Get the facility status
- rfi ; Bail back...
-;
- .align 5
-notufp: mtcrf 0xC0,r11 ; Restore the used CRs
- li r11,T_SYSTEM_CALL ; Set interrupt code
- mfsprg r13,1 ; Get the exception save area
- b .L_exception_entry ; Join common...
-
-scloadmsr: mfsrr1 r13 ; Get the old SRR
- rlwinm. r13,r13,0,MSR_PR_BIT,MSR_PR_BIT ; From problem state?
- mfsprg r13,0 ; Restore per_proc
- bne- notufp ; Someone is trying to cheat...
-
- mtcrf 0xC0,r11 ; Restore CR
- lwz r11,pfAvailable(r13) ; Pick up the feature flags
- mtsrr1 r3 ; Set new MSR
- mfsprg r13,2 ; Restore R13
- mtsprg 2,r11 ; Set the feature flags into sprg2
- mfsprg r11,3 ; Restore R11
- rfi ; Blast back
-
+ rlwinm r11,r0,0,0xFFFFFFF8 ; mask off low 3 bits of syscall number
+ xori r13,r11,0x7FF0 ; start to check for the 0x7FFx traps
+ addi r11,r11,8 ; make a 0 iff this is a 0xFFFFFFF8 trap
+ cntlzw r13,r13 ; set bit 0x20 iff a 0x7FFx trap
+ cntlzw r11,r11 ; set bit 0x20 iff a 0xFFFFFFF8 trap
+ xoris r0,r0,0x8000 ; Flip bit to make 0 iff 0x80000000
+ rlwimi r11,r13,31,0x10 ; move 0x7FFx bit into position
+ cntlzw r13,r0 ; Set bit 0x20 iff 0x80000000
+ xoris r0,r0,0x8000 ; Flip bit to restore R0
+ rlwimi r11,r13,2,0x80 ; Set bit 0x80 iff CutTrace
+ xori r13,r0,0x6004 ; start to check for 0x6004
+ rlwimi r11,r0,1,0xE ; move in low 3 bits of syscall number
+ cntlzw r13,r13 ; set bit 0x20 iff 0x6004
+ rlwinm r11,r11,0,0,30 ; clear out bit 31
+ rlwimi r11,r13,1,0x40 ; move 0x6004 bit into position
+ lhz r11,lo16(scTable)(r11) ; get branch address from sc table
+ mfctr r13 ; save caller's ctr in r13
+ mtctr r11 ; set up branch to syscall handler
+ mfsprg r11,0 ; get per_proc, which most UFTs use
+ bctr ; dispatch (r11 in sprg3, r13 in sprg2, ctr in r13, per_proc in r11)
/*
* Trace - generated by single stepping
. = 0xD00
.L_handlerD00:
- mtsprg 2,r13 ; Save R13
mtsprg 3,r11 ; Save R11
- mfsrr1 r13 ; Get the old MSR
- mfcr r11 ; Get the CR
- rlwinm. r13,r13,0,MSR_PR_BIT,MSR_PR_BIT ; Are we in supervisor state?
- beq- notspectr ; Yes, not special trace...
- mfsprg r13,0 ; Get the per_proc area
- lhz r13,PP_CPU_FLAGS(r13) ; Get the flags
- rlwinm. r13,r13,0,traceBEb+16,traceBEb+16 ; Special trace enabled?
- bne+ specbrtr ; Yeah...
-
-notspectr: mtcr r11 ; Restore CR
- mfsprg r13,1 ; Get the savearea
- li r11,T_TRACE ; Set interrupt code
+ mfsprg r11,2 ; Get the feature flags
+ mtsprg 2,r13 ; Save R13
+ rlwinm r11,r11,pf64Bitb-4,4,4 ; Get the 64-bit flag
+ mfcr r13 ; Get the CR
+ mtcrf 0x40,r11 ; Set the CR
+ mfsrr1 r11 ; Get the old MSR
+ rlwinm. r11,r11,0,MSR_PR_BIT,MSR_PR_BIT ; Are we in supervisor state?
+
+ mfsprg r11,0 ; Get the per_proc
+ lhz r11,PP_CPU_FLAGS(r11) ; Get the flags
+ crmove cr1_eq,cr0_eq ; Remember if we are in supervisor state
+ rlwinm. r11,r11,0,traceBEb+16,traceBEb+16 ; Special trace enabled?
+ cror cr0_eq,cr0_eq,cr1_eq ; Is trace off or supervisor state?
+ bf-- cr0_eq,specbrtr ; No, we need to trace...
+
+notspectr: mtcr r13 ; Restore CR
+ li r11,T_TRACE|T_FAM ; Set interrupt code
b .L_exception_entry ; Join common...
+ .align 5
+
;
; We are doing the special branch trace
;
-specbrtr: mfsprg r13,0 ; Get the per_proc area
- stw r1,emfp0(r13) ; Save in a scratch area
- stw r2,emfp0+4(r13) ; Save in a scratch area
- stw r3,emfp0+8(r13) ; Save in a scratch area
-
- lwz r1,spcTRc(r13) ; Pick up the count
- lis r2,hi16(EXT(pc_trace_buf)) ; Get the top of the buffer
- subi r1,r1,1 ; Count down
- lwz r3,spcTRp(r13) ; Pick up buffer position
- mr. r1,r1 ; Is it time to count?
- ori r2,r2,lo16(EXT(pc_trace_buf)) ; Get the bottom of the buffer
- cmplwi cr1,r3,4092 ; Set cr1_eq if we should take exception
- ble+ spclogpc ; We are logging this one...
- cmplwi cr1,r2,0 ; Set cr1_eq false so we do not take an interrupt
- b spcskip ; Fly away...
+specbrtr: mfsprg r11,0 ; Get the per_proc area
+ bt++ 4,sbxx64a ; Jump if 64-bit...
+
+ stw r1,tempr0+4(r11) ; Save in a scratch area
+ stw r2,tempr1+4(r11) ; Save in a scratch area
+ stw r3,tempr2+4(r11) ; Save in a scratch area
+ b sbxx64b ; Skip...
-spclogpc: mfsrr0 r1 ; Get the pc
+sbxx64a: std r1,tempr0(r11) ; Save in a scratch area
+ std r2,tempr1(r11) ; Save in a scratch area
+ std r3,tempr2(r11) ; Save in a scratch area
+
+sbxx64b: lis r2,hi16(EXT(pc_trace_buf)) ; Get the top of the buffer
+ lwz r3,spcTRp(r11) ; Pick up buffer position
+ ori r2,r2,lo16(EXT(pc_trace_buf)) ; Get the bottom of the buffer
+ cmplwi cr2,r3,4092 ; Set cr1_eq if we should take exception
+ mfsrr0 r1 ; Get the pc
stwx r1,r2,r3 ; Save it in the buffer
addi r3,r3,4 ; Point to the next slot
- li r1,2 ; Number of branches to skip
rlwinm r3,r3,0,20,31 ; Wrap the slot at one page
- stw r3,spcTRp(r13) ; Save the new slot
+ stw r3,spcTRp(r11) ; Save the new slot
-spcskip: stw r1,spcTRc(r13) ; Save the new count
+ bt++ 4,sbxx64c ; Jump if 64-bit...
- lwz r1,emfp0(r13) ; Restore work register
- lwz r2,emfp0+4(r13) ; Restore work register
- lwz r3,emfp0+8(r13) ; Restore work register
- beq cr1,notspectr ; Buffer filled, make a rupt...
-
- mtcr r11 ; Restore the CR
- mfsprg r13,2 ; Restore R13
- mfsprg r11,3 ; Restore R11
- rfi ; Bail back...
+ lwz r1,tempr0+4(r11) ; Restore work register
+ lwz r2,tempr1+4(r11) ; Restore work register
+ lwz r3,tempr2+4(r11) ; Restore work register
+ beq cr2,notspectr ; Buffer filled, make a rupt...
+ mtcr r13 ; Restore CR
+ b uftRFI ; Go restore and leave...
+
+sbxx64c: ld r1,tempr0(r11) ; Restore work register
+ ld r2,tempr1(r11) ; Restore work register
+ ld r3,tempr2(r11) ; Restore work register
+ beq cr2,notspectr ; Buffer filled, make a rupt...
+ mtcr r13 ; Restore CR
+ b uftRFI ; Go restore and leave...
/*
* Floating point assist
*/
- . = 0xe00
+ . = 0xE00
.L_handlerE00:
mtsprg 2,r13 /* Save R13 */
mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
li r11,T_FP_ASSIST /* Set 'rupt code */
b .L_exception_entry /* Join common... */
PMIhandler:
mtsprg 2,r13 /* Save R13 */
mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
li r11,T_PERF_MON /* Set 'rupt code */
b .L_exception_entry /* Join common... */
VMXhandler:
mtsprg 2,r13 /* Save R13 */
mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
li r11,T_VMX /* Set 'rupt code */
b .L_exception_entry /* Join common... */
-/*
- * Instruction translation miss - we inline this code.
- * Upon entry (done for us by the machine):
- * srr0 : addr of instruction that missed
- * srr1 : bits 0-3 = saved CR0
- * 4 = lru way bit
- * 16-31 = saved msr
- * msr[tgpr] = 1 (so gpr0-3 become our temporary variables)
- * imiss: ea that missed
- * icmp : the compare value for the va that missed
- * hash1: pointer to first hash pteg
- * hash2: pointer to 2nd hash pteg
- *
- * Register usage:
- * tmp0: saved counter
- * tmp1: junk
- * tmp2: pointer to pteg
- * tmp3: current compare value
- *
- * This code is taken from the 603e User's Manual with
- * some bugfixes and minor improvements to save bytes and cycles
- *
- * NOTE: Do not touch sprg2 in here
- */
+;
+; Instruction translation miss exception - not supported
+;
- . = 0x1000
+ . = 0x1000
.L_handler1000:
- mfspr tmp2, hash1
- mfctr tmp0 /* use tmp0 to save ctr */
- mfspr tmp3, icmp
-
-.L_imiss_find_pte_in_pteg:
- li tmp1, 8 /* count */
- subi tmp2, tmp2, 8 /* offset for lwzu */
- mtctr tmp1 /* count... */
-
-.L_imiss_pteg_loop:
- lwz tmp1, 8(tmp2) /* check pte0 for match... */
- addi tmp2, tmp2, 8
- cmpw cr0, tmp1, tmp3
-#if 0
- bdnzf+ cr0, .L_imiss_pteg_loop
-#else
- bc 0,2, .L_imiss_pteg_loop
-#endif
- beq+ cr0, .L_imiss_found_pte
-
- /* Not found in PTEG, we must scan 2nd then give up */
-
- andi. tmp1, tmp3, MASK(PTE0_HASH_ID)
- bne- .L_imiss_do_no_hash_exception /* give up */
-
- mfspr tmp2, hash2
- ori tmp3, tmp3, MASK(PTE0_HASH_ID)
- b .L_imiss_find_pte_in_pteg
-
-.L_imiss_found_pte:
-
- lwz tmp1, 4(tmp2) /* get pte1_t */
- andi. tmp3, tmp1, MASK(PTE1_WIMG_GUARD) /* Fault? */
- bne- .L_imiss_do_prot_exception /* Guarded - illegal */
-
- /* Ok, we've found what we need to, restore and rfi! */
-
- mtctr tmp0 /* restore ctr */
- mfsrr1 tmp3
- mfspr tmp0, imiss
- mtcrf 0x80, tmp3 /* Restore CR0 */
- mtspr rpa, tmp1 /* set the pte */
- ori tmp1, tmp1, MASK(PTE1_REFERENCED) /* set referenced */
- tlbli tmp0
- sth tmp1, 6(tmp2)
- rfi
-
-.L_imiss_do_prot_exception:
- /* set up srr1 to indicate protection exception... */
- mfsrr1 tmp3
- andi. tmp2, tmp3, 0xffff
- addis tmp2, tmp2, MASK(SRR1_TRANS_PROT) >> 16
- b .L_imiss_do_exception
-
-.L_imiss_do_no_hash_exception:
- /* clean up registers for protection exception... */
- mfsrr1 tmp3
- andi. tmp2, tmp3, 0xffff
- addis tmp2, tmp2, MASK(SRR1_TRANS_HASH) >> 16
-
- /* And the entry into the usual instruction fault handler ... */
-.L_imiss_do_exception:
-
- mtctr tmp0 /* Restore ctr */
- mtsrr1 tmp2 /* Set up srr1 */
- mfmsr tmp0
- xoris tmp0, tmp0, MASK(MSR_TGPR)>>16 /* no TGPR */
- mtcrf 0x80, tmp3 /* Restore CR0 */
- mtmsr tmp0 /* reset MSR[TGPR] */
- b .L_handler400 /* Instr Access */
+ mtsprg 2,r13 ; Save R13
+ mtsprg 3,r11 ; Save R11
+ li r11,T_INVALID_EXCP0 ; Set rupt code
+ b .L_exception_entry ; Join common...
+
-/*
- * Data load translation miss
- *
- * Upon entry (done for us by the machine):
- * srr0 : addr of instruction that missed
- * srr1 : bits 0-3 = saved CR0
- * 4 = lru way bit
- * 5 = 1 if store
- * 16-31 = saved msr
- * msr[tgpr] = 1 (so gpr0-3 become our temporary variables)
- * dmiss: ea that missed
- * dcmp : the compare value for the va that missed
- * hash1: pointer to first hash pteg
- * hash2: pointer to 2nd hash pteg
- *
- * Register usage:
- * tmp0: saved counter
- * tmp1: junk
- * tmp2: pointer to pteg
- * tmp3: current compare value
- *
- * This code is taken from the 603e User's Manual with
- * some bugfixes and minor improvements to save bytes and cycles
- *
- * NOTE: Do not touch sprg2 in here
- */
- . = 0x1100
+;
+; Data load translation miss exception - not supported
+;
+
+ . = 0x1100
.L_handler1100:
- mfspr tmp2, hash1
- mfctr tmp0 /* use tmp0 to save ctr */
- mfspr tmp3, dcmp
-
-.L_dlmiss_find_pte_in_pteg:
- li tmp1, 8 /* count */
- subi tmp2, tmp2, 8 /* offset for lwzu */
- mtctr tmp1 /* count... */
-
-.L_dlmiss_pteg_loop:
- lwz tmp1, 8(tmp2) /* check pte0 for match... */
- addi tmp2, tmp2, 8
- cmpw cr0, tmp1, tmp3
-#if 0 /* How to write this correctly? */
- bdnzf+ cr0, .L_dlmiss_pteg_loop
-#else
- bc 0,2, .L_dlmiss_pteg_loop
-#endif
- beq+ cr0, .L_dmiss_found_pte
-
- /* Not found in PTEG, we must scan 2nd then give up */
-
- andi. tmp1, tmp3, MASK(PTE0_HASH_ID) /* already at 2nd? */
- bne- .L_dmiss_do_no_hash_exception /* give up */
-
- mfspr tmp2, hash2
- ori tmp3, tmp3, MASK(PTE0_HASH_ID)
- b .L_dlmiss_find_pte_in_pteg
-
-.L_dmiss_found_pte:
-
- lwz tmp1, 4(tmp2) /* get pte1_t */
-
- /* Ok, we've found what we need to, restore and rfi! */
-
- mtctr tmp0 /* restore ctr */
- mfsrr1 tmp3
- mfspr tmp0, dmiss
- mtcrf 0x80, tmp3 /* Restore CR0 */
- mtspr rpa, tmp1 /* set the pte */
- ori tmp1, tmp1, MASK(PTE1_REFERENCED) /* set referenced */
- tlbld tmp0 /* load up tlb */
- sth tmp1, 6(tmp2) /* sth is faster? */
- rfi
-
- /* This code is shared with data store translation miss */
-
-.L_dmiss_do_no_hash_exception:
- /* clean up registers for protection exception... */
- mfsrr1 tmp3
- /* prepare to set DSISR_WRITE_BIT correctly from srr1 info */
- rlwinm tmp1, tmp3, 9, 6, 6
- addis tmp1, tmp1, MASK(DSISR_HASH) >> 16
-
- /* And the entry into the usual data fault handler ... */
-
- mtctr tmp0 /* Restore ctr */
- andi. tmp2, tmp3, 0xffff /* Clean up srr1 */
- mtsrr1 tmp2 /* Set srr1 */
- mtdsisr tmp1
- mfspr tmp2, dmiss
- mtdar tmp2
- mfmsr tmp0
- xoris tmp0, tmp0, MASK(MSR_TGPR)>>16 /* no TGPR */
- mtcrf 0x80, tmp3 /* Restore CR0 */
- sync /* Needed on some */
- mtmsr tmp0 /* reset MSR[TGPR] */
- b .L_handler300 /* Data Access */
+ mtsprg 2,r13 ; Save R13
+ mtsprg 3,r11 ; Save R11
+ li r11,T_INVALID_EXCP1 ; Set rupt code
+ b .L_exception_entry ; Join common...
+
-/*
- * Data store translation miss (similar to data load)
- *
- * Upon entry (done for us by the machine):
- * srr0 : addr of instruction that missed
- * srr1 : bits 0-3 = saved CR0
- * 4 = lru way bit
- * 5 = 1 if store
- * 16-31 = saved msr
- * msr[tgpr] = 1 (so gpr0-3 become our temporary variables)
- * dmiss: ea that missed
- * dcmp : the compare value for the va that missed
- * hash1: pointer to first hash pteg
- * hash2: pointer to 2nd hash pteg
- *
- * Register usage:
- * tmp0: saved counter
- * tmp1: junk
- * tmp2: pointer to pteg
- * tmp3: current compare value
- *
- * This code is taken from the 603e User's Manual with
- * some bugfixes and minor improvements to save bytes and cycles
- *
- * NOTE: Do not touch sprg2 in here
- */
- . = 0x1200
+;
+; Data store translation miss exception - not supported
+;
+
+ . = 0x1200
.L_handler1200:
- mfspr tmp2, hash1
- mfctr tmp0 /* use tmp0 to save ctr */
- mfspr tmp3, dcmp
-
-.L_dsmiss_find_pte_in_pteg:
- li tmp1, 8 /* count */
- subi tmp2, tmp2, 8 /* offset for lwzu */
- mtctr tmp1 /* count... */
-
-.L_dsmiss_pteg_loop:
- lwz tmp1, 8(tmp2) /* check pte0 for match... */
- addi tmp2, tmp2, 8
-
- cmpw cr0, tmp1, tmp3
-#if 0 /* I don't know how to write this properly */
- bdnzf+ cr0, .L_dsmiss_pteg_loop
-#else
- bc 0,2, .L_dsmiss_pteg_loop
-#endif
- beq+ cr0, .L_dsmiss_found_pte
-
- /* Not found in PTEG, we must scan 2nd then give up */
-
- andi. tmp1, tmp3, MASK(PTE0_HASH_ID) /* already at 2nd? */
- bne- .L_dmiss_do_no_hash_exception /* give up */
-
- mfspr tmp2, hash2
- ori tmp3, tmp3, MASK(PTE0_HASH_ID)
- b .L_dsmiss_find_pte_in_pteg
-
-.L_dsmiss_found_pte:
-
- lwz tmp1, 4(tmp2) /* get pte1_t */
- andi. tmp3, tmp1, MASK(PTE1_CHANGED) /* unchanged, check? */
- beq- .L_dsmiss_check_prot /* yes, check prot */
-
-.L_dsmiss_resolved:
- /* Ok, we've found what we need to, restore and rfi! */
-
- mtctr tmp0 /* restore ctr */
- mfsrr1 tmp3
- mfspr tmp0, dmiss
- mtcrf 0x80, tmp3 /* Restore CR0 */
- mtspr rpa, tmp1 /* set the pte */
- tlbld tmp0 /* load up tlb */
- rfi
-
-.L_dsmiss_check_prot:
- /* PTE is unchanged, we must check that we can write */
- rlwinm. tmp3, tmp1, 30, 0, 1 /* check PP[1] */
- bge- .L_dsmiss_check_prot_user_kern
- andi. tmp3, tmp1, 1 /* check PP[0] */
- beq+ .L_dsmiss_check_prot_ok
-
-.L_dmiss_do_prot_exception:
- /* clean up registers for protection exception... */
- mfsrr1 tmp3
- /* prepare to set DSISR_WRITE_BIT correctly from srr1 info */
- rlwinm tmp1, tmp3, 9, 6, 6
- addis tmp1, tmp1, MASK(DSISR_PROT) >> 16
-
- /* And the entry into the usual data fault handler ... */
-
- mtctr tmp0 /* Restore ctr */
- andi. tmp2, tmp3, 0xffff /* Clean up srr1 */
- mtsrr1 tmp2 /* Set srr1 */
- mtdsisr tmp1
- mfspr tmp2, dmiss
- mtdar tmp2
- mfmsr tmp0
- xoris tmp0, tmp0, MASK(MSR_TGPR)>>16 /* no TGPR */
- mtcrf 0x80, tmp3 /* Restore CR0 */
- sync /* Needed on some */
- mtmsr tmp0 /* reset MSR[TGPR] */
- b .L_handler300 /* Data Access */
-
-/* NB - if we knew we were on a 603e we could test just the MSR_KEY bit */
-.L_dsmiss_check_prot_user_kern:
- mfsrr1 tmp3
- andi. tmp3, tmp3, MASK(MSR_PR)
- beq+ .L_dsmiss_check_prot_kern
- mfspr tmp3, dmiss /* check user privs */
- mfsrin tmp3, tmp3 /* get excepting SR */
- andis. tmp3, tmp3, 0x2000 /* Test SR ku bit */
- beq+ .L_dsmiss_check_prot_ok
- b .L_dmiss_do_prot_exception
-
-.L_dsmiss_check_prot_kern:
- mfspr tmp3, dmiss /* check kern privs */
- mfsrin tmp3, tmp3
- andis. tmp3, tmp3, 0x4000 /* Test SR Ks bit */
- bne- .L_dmiss_do_prot_exception
-
-.L_dsmiss_check_prot_ok:
- /* Ok, mark as referenced and changed before resolving the fault */
- ori tmp1, tmp1, (MASK(PTE1_REFERENCED)|MASK(PTE1_CHANGED))
- sth tmp1, 6(tmp2)
- b .L_dsmiss_resolved
+ mtsprg 2,r13 ; Save R13
+ mtsprg 3,r11 ; Save R11
+ li r11,T_INVALID_EXCP2 ; Set rupt code
+ b .L_exception_entry ; Join common...
+
/*
* Instruction address breakpoint
.L_handler1300:
mtsprg 2,r13 /* Save R13 */
mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
li r11,T_INSTRUCTION_BKPT /* Set 'rupt code */
b .L_exception_entry /* Join common... */
.L_handler1400:
mtsprg 2,r13 /* Save R13 */
mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
li r11,T_SYSTEM_MANAGEMENT /* Set 'rupt code */
b .L_exception_entry /* Join common... */
+
+/*
+ * Soft Patch
+ */
+
+ . = 0x1500
+.L_handler1500:
+ mtsprg 2,r13 /* Save R13 */
+ mtsprg 3,r11 /* Save R11 */
+ li r11,T_SOFT_PATCH /* Set 'rupt code */
+ b .L_exception_entry /* Join common... */
+
;
-; Altivec Java Mode Assist interrupt
+; Altivec Java Mode Assist interrupt or Maintenace interrupt
;
. = 0x1600
.L_handler1600:
mtsprg 2,r13 /* Save R13 */
mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
li r11,T_ALTIVEC_ASSIST /* Set 'rupt code */
b .L_exception_entry /* Join common... */
;
-; Thermal interruption
+; Altivec Java Mode Assist interrupt or Thermal interruption
;
. = 0x1700
.L_handler1700:
mtsprg 2,r13 /* Save R13 */
mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
li r11,T_THERMAL /* Set 'rupt code */
b .L_exception_entry /* Join common... */
+;
+; Thermal interruption - 64-bit
+;
+
+ . = 0x1800
+.L_handler1800:
+ mtsprg 2,r13 /* Save R13 */
+ mtsprg 3,r11 /* Save R11 */
+ li r11,T_ARCHDEP0 /* Set 'rupt code */
+ b .L_exception_entry /* Join common... */
+
/*
* There is now a large gap of reserved traps
*/
/*
- * Run mode/ trace exception - single stepping on 601 processors
+ * Instrumentation interruption
*/
. = 0x2000
.L_handler2000:
mtsprg 2,r13 /* Save R13 */
mtsprg 3,r11 /* Save R11 */
- mfsprg r13,1 /* Get the exception save area */
- li r11,T_RUNMODE_TRACE /* Set 'rupt code */
+ li r11,T_INSTRUMENTATION /* Set 'rupt code */
b .L_exception_entry /* Join common... */
-/*
- * .L_exception_entry(type)
- *
- * This is the common exception handling routine called by any
- * type of system exception.
- *
- * ENTRY: via a system exception handler, thus interrupts off, VM off.
- * r3 has been saved in sprg3 and now contains a number
- * representing the exception's origins
- *
- */
+
.data
.align ALIGN
.long .L_exception_entry-EXT(ExceptionVectorsStart) /* phys addr of fn */
VECTOR_SEGMENT
- .align 5
-.L_exception_entry:
-
-/*
+/*<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
*
- * Here we will save off a mess of registers, the special ones and R0-R12. We use the DCBZ
- * instruction to clear and allcoate a line in the cache. This way we won't take any cache
- * misses, so these stores won't take all that long. Except the first line that is because
- * we can't do a DCBZ if the L1 D-cache is off. The rest we will skip if they are
- * off also.
+ * First-level syscall dispatch. The syscall vector maps r0 (the syscall number) into an
+ * index into the "scTable" (below), and then branches to one of these routines. The PPC
+ * syscalls come in several varieties, as follows:
*
- * Note that if we are attempting to sleep (as opposed to nap or doze) all interruptions
- * are ignored.
+ * 1. If (syscall & 0xFFFFF000) == 0x00007000, then it is a PPC Fast Trap or UFT.
+ * The UFTs are dispatched here, the Fast Traps are dispatched in hw_exceptions.s.
+ *
+ * 2. If (syscall & 0xFFFFF000) == 0x00006000, then it is a PPC-only trap.
+ * One of these (0x6004) is a UFT, but most are dispatched in hw_exceptions.s. These
+ * are mostly Blue Box or VMM (Virtual Machine) calls.
+ *
+ * 3. If (syscall & 0xFFFFFFF0) == 0xFFFFFFF0, then it is also a UFT and is dispatched here.
+ *
+ * 4. If (syscall & 0xFFFFF000) == 0x80000000, then it is a "firmware" call and is dispatched in
+ * Firmware.s, though the special "Cut Trace" trap (0x80000000) is handled here as an ultra
+ * fast trap.
+ *
+ * 5. If (syscall & 0xFFFFF000) == 0xFFFFF000, and it is not one of the above, then it is a Mach
+ * syscall, which are dispatched in hw_exceptions.s via "mach_trap_table".
+ *
+ * 6. If (syscall & 0xFFFFF000) == 0x00000000, then it is a BSD syscall, which are dispatched
+ * by "unix_syscall" using the "sysent" table.
+ *
+ * What distinguishes the UFTs, aside from being ultra fast, is that they cannot rely on translation
+ * being on, and so cannot look at the activation or task control block, etc. We handle them right
+ * here, and return to the caller without turning interrupts or translation on. The UFTs are:
+ *
+ * 0xFFFFFFFF - BlueBox only - MKIsPreemptiveTask
+ * 0xFFFFFFFE - BlueBox only - MKIsPreemptiveTaskEnv
+ * 0x00007FF2 - User state only - thread info (32-bit mode)
+ * 0x00007FF3 - User state only - floating point / vector facility status
+ * 0x00007FF4 - Kernel only - loadMSR - not used on 64-bit machines
+ * 0x00006004 - vmm_dispatch (only some of which are UFTs)
+ *
+ * "scTable" is an array of 2-byte addresses, accessed using a 7-bit index derived from the syscall
+ * number as follows:
+ *
+ * 0x80 (A) - set if syscall number is 0x80000000
+ * 0x40 (B) - set if syscall number is 0x00006004
+ * 0x20 (C) - set if upper 29 bits of syscall number are 0xFFFFFFF8
+ * 0x10 (D) - set if upper 29 bits of syscall number are 0x00007FF0
+ * 0x0E (E) - low three bits of syscall number
+ *
+ * If you define another UFT, try to use a number in one of the currently decoded ranges, ie one marked
+ * "unassigned" below. The dispatch table and the UFT handlers must reside in the first 32KB of
+ * physical memory.
+ */
+
+ .align 8 ; start this table on a 256-byte boundry
+scTable: ; ABCD E
+ .short uftNormalSyscall-baseR ; 0000 0 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0000 1 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0000 2 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0000 3 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0000 4 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0000 5 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0000 6 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0000 7 these syscalls are not in a reserved range
+
+ .short uftNormalSyscall-baseR ; 0001 0 0x7FF0 is unassigned
+ .short uftNormalSyscall-baseR ; 0001 1 0x7FF1 is Set Thread Info Fast Trap (pass up)
+ .short uftThreadInfo-baseR ; 0001 2 0x7FF2 is Thread Info
+ .short uftFacilityStatus-baseR ; 0001 3 0x7FF3 is Facility Status
+ .short uftLoadMSR-baseR ; 0001 4 0x7FF4 is Load MSR
+ .short uftNormalSyscall-baseR ; 0001 5 0x7FF5 is the Null FastPath Trap (pass up)
+ .short uftNormalSyscall-baseR ; 0001 6 0x7FF6 is unassigned
+ .short uftNormalSyscall-baseR ; 0001 7 0x7FF7 is unassigned
+
+ .short uftNormalSyscall-baseR ; 0010 0 0xFFFFFFF0 is unassigned
+ .short uftNormalSyscall-baseR ; 0010 1 0xFFFFFFF1 is unassigned
+ .short uftNormalSyscall-baseR ; 0010 2 0xFFFFFFF2 is unassigned
+ .short uftNormalSyscall-baseR ; 0010 3 0xFFFFFFF3 is unassigned
+ .short uftNormalSyscall-baseR ; 0010 4 0xFFFFFFF4 is unassigned
+ .short uftNormalSyscall-baseR ; 0010 5 0xFFFFFFF5 is unassigned
+ .short uftIsPreemptiveTaskEnv-baseR ; 0010 6 0xFFFFFFFE is Blue Box uftIsPreemptiveTaskEnv
+ .short uftIsPreemptiveTask-baseR ; 0010 7 0xFFFFFFFF is Blue Box IsPreemptiveTask
+
+ .short WhoaBaby-baseR ; 0011 0 impossible combination
+ .short WhoaBaby-baseR ; 0011 1 impossible combination
+ .short WhoaBaby-baseR ; 0011 2 impossible combination
+ .short WhoaBaby-baseR ; 0011 3 impossible combination
+ .short WhoaBaby-baseR ; 0011 4 impossible combination
+ .short WhoaBaby-baseR ; 0011 5 impossible combination
+ .short WhoaBaby-baseR ; 0011 6 impossible combination
+ .short WhoaBaby-baseR ; 0011 7 impossible combination
+
+ .short WhoaBaby-baseR ; 0100 0 0x6000 is an impossible index (diagCall)
+ .short WhoaBaby-baseR ; 0100 1 0x6001 is an impossible index (vmm_get_version)
+ .short WhoaBaby-baseR ; 0100 2 0x6002 is an impossible index (vmm_get_features)
+ .short WhoaBaby-baseR ; 0100 3 0x6003 is an impossible index (vmm_init_context)
+ .short uftVMM-baseR ; 0100 4 0x6004 is vmm_dispatch (only some of which are UFTs)
+ .short WhoaBaby-baseR ; 0100 5 0x6005 is an impossible index (bb_enable_bluebox)
+ .short WhoaBaby-baseR ; 0100 6 0x6006 is an impossible index (bb_disable_bluebox)
+ .short WhoaBaby-baseR ; 0100 7 0x6007 is an impossible index (bb_settaskenv)
+
+ .short uftNormalSyscall-baseR ; 0101 0 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0101 1 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0101 2 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0101 3 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0101 4 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0101 5 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0101 6 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0101 7 these syscalls are not in a reserved range
+
+ .short uftNormalSyscall-baseR ; 0110 0 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0110 1 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0110 2 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0110 3 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0110 4 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0110 5 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0110 6 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0110 7 these syscalls are not in a reserved range
+
+ .short uftNormalSyscall-baseR ; 0111 0 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0111 1 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0111 2 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0111 3 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0111 4 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0111 5 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0111 6 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 0111 7 these syscalls are not in a reserved range
+
+ .short uftCutTrace-baseR ; 1000 0 CutTrace
+ .short uftNormalSyscall-baseR ; 1000 1 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1000 2 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1000 3 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1000 4 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1000 5 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1000 6 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1000 7 these syscalls are not in a reserved range
+
+ .short uftNormalSyscall-baseR ; 1001 0 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1001 1 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1001 2 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1001 3 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1001 4 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1001 5 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1001 6 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1001 7 these syscalls are not in a reserved range
+
+ .short uftNormalSyscall-baseR ; 1010 0 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1010 1 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1010 2 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1010 3 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1010 4 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1010 5 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1010 6 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1010 7 these syscalls are not in a reserved range
+
+ .short uftNormalSyscall-baseR ; 1011 0 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1011 1 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1011 2 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1011 3 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1011 4 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1011 5 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1011 6 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1011 7 these syscalls are not in a reserved range
+
+ .short uftNormalSyscall-baseR ; 1100 0 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1100 1 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1100 2 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1100 3 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1100 4 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1100 5 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1100 6 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1100 7 these syscalls are not in a reserved range
+
+ .short uftNormalSyscall-baseR ; 1101 0 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1101 1 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1101 2 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1101 3 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1101 4 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1101 5 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1101 6 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1101 7 these syscalls are not in a reserved range
+
+ .short uftNormalSyscall-baseR ; 1110 0 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1110 1 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1110 2 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1110 3 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1110 4 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1110 5 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1110 6 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1110 7 these syscalls are not in a reserved range
+
+ .short uftNormalSyscall-baseR ; 1111 0 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1111 1 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1111 2 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1111 3 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1111 4 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1111 5 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1111 6 these syscalls are not in a reserved range
+ .short uftNormalSyscall-baseR ; 1111 7 these syscalls are not in a reserved range
+
+ .align 2 ; prepare for code
+
+
+/* Ultra Fast Trap (UFT) Handlers:
+ *
+ * We get here directly from the hw syscall vector via the "scTable" vector (above),
+ * with interrupts and VM off, in 64-bit mode if supported, and with all registers live
+ * except the following:
+ *
+ * r11 = per_proc ptr (ie, sprg0)
+ * r13 = holds caller's ctr register
+ * sprg2 = holds caller's r13
+ * sprg3 = holds caller's r11
*/
- stw r1,saver1(r13) ; Save register 1
- stw r0,saver0(r13) ; Save register 0
- mfspr r1,hid0 ; Get HID0
- mfcr r0 ; Save the CR
- mtcrf 255,r1 ; Get set to test for cache and sleep
- bf sleep,notsleep ; Skip if we are not trying to sleep
+; Handle "vmm_dispatch" (0x6004), of which only some selectors are UFTs.
+
+uftVMM:
+ mtctr r13 ; restore caller's ctr
+ lwz r11,spcFlags(r11) ; get the special flags word from per_proc
+ mfcr r13 ; save caller's entire cr (we use all fields below)
+ rlwinm r11,r11,16,16,31 ; Extract spcFlags upper bits
+ andi. r11,r11,hi16(runningVM|FamVMena|FamVMmode)
+ cmpwi cr0,r11,hi16(runningVM|FamVMena|FamVMmode) ; Test in VM FAM
+ bne-- uftNormal80 ; not eligible for FAM UFTs
+ cmpwi cr5,r3,kvmmResumeGuest ; Compare r3 with kvmmResumeGuest
+ cmpwi cr2,r3,kvmmSetGuestRegister ; Compare r3 with kvmmSetGuestRegister
+ cror cr1_eq,cr5_lt,cr2_gt ; Set true if out of VMM Fast syscall range
+ bt-- cr1_eq,uftNormalFF ; Exit if out of range (the others are not UFTs)
+ b EXT(vmm_ufp) ; handle UFT range of vmm_dispatch syscall
+
+
+; Handle blue box UFTs (syscalls -1 and -2).
+
+uftIsPreemptiveTask:
+uftIsPreemptiveTaskEnv:
+ mtctr r13 ; restore caller's ctr
+ lwz r11,spcFlags(r11) ; get the special flags word from per_proc
+ mfcr r13,0x80 ; save caller's cr0 so we can use it
+ andi. r11,r11,bbNoMachSC|bbPreemptive ; Clear what we do not need
+ cmplwi r11,bbNoMachSC ; See if we are trapping syscalls
+ blt-- uftNormal80 ; No...
+ cmpwi r0,-2 ; is this call IsPreemptiveTaskEnv?
+ rlwimi r13,r11,bbPreemptivebit-cr0_eq,cr0_eq,cr0_eq ; Copy preemptive task flag into user cr0_eq
+ mfsprg r11,0 ; Get the per proc once more
+ bne++ uftRestoreThenRFI ; do not load r0 if IsPreemptiveTask
+ lwz r0,ppbbTaskEnv(r11) ; Get the shadowed taskEnv (only difference)
+ b uftRestoreThenRFI ; restore modified cr0 and return
+
+
+; Handle "Thread Info" UFT (0x7FF2)
+
+ .globl EXT(uft_uaw_nop_if_32bit)
+uftThreadInfo:
+ lwz r3,UAW+4(r11) ; get user assist word, assuming a 32-bit processor
+LEXT(uft_uaw_nop_if_32bit)
+ ld r3,UAW(r11) ; get the whole doubleword if 64-bit (patched to nop if 32-bit)
+ mtctr r13 ; restore caller's ctr
+ b uftRFI ; done
+
+
+; Handle "Facility Status" UFT (0x7FF3)
+
+uftFacilityStatus:
+ lwz r3,spcFlags(r11) ; get "special flags" word from per_proc
+ mtctr r13 ; restore caller's ctr
+ b uftRFI ; done
+
+
+; Handle "Load MSR" UFT (0x7FF4). This is not used on 64-bit processors, though it would work.
+
+uftLoadMSR:
+ mfsrr1 r11 ; get caller's MSR
+ mtctr r13 ; restore caller's ctr
+ mfcr r13,0x80 ; save caller's cr0 so we can test PR
+ rlwinm. r11,r11,0,MSR_PR_BIT,MSR_PR_BIT ; really in the kernel?
+ bne- uftNormal80 ; do not permit from user mode
+ mfsprg r11,0 ; restore per_proc
+ mtsrr1 r3 ; Set new MSR
+
+
+; Return to caller after UFT. When called:
+; r11 = per_proc ptr
+; r13 = callers cr0 in upper nibble (if uftRestoreThenRFI called)
+; sprg2 = callers r13
+; sprg3 = callers r11
+
+uftRestoreThenRFI: ; WARNING: can drop down to here
+ mtcrf 0x80,r13 ; restore caller's cr0
+uftRFI:
+ .globl EXT(uft_nop_if_32bit)
+LEXT(uft_nop_if_32bit)
+ b uftX64 ; patched to NOP if 32-bit processor
- mtcrf 255,r0 ; Restore the CR
- lwz r0,saver0(r13) ; Restore R0
- lwz r1,saver1(r13) ; Restore R1
- mfsprg r13,0 ; Get the per_proc
- lwz r11,pfAvailable(r13) ; Get back the feature flags
+uftX32: lwz r11,pfAvailable(r11) ; Get the feature flags
mfsprg r13,2 ; Restore R13
- mtsprg 2,r11 ; Set sprg2 to the features
+ mtsprg 2,r11 ; Set the feature flags
mfsprg r11,3 ; Restore R11
- rfi ; Jump back into sleep code...
+ rfi ; Back to our guy...
+
+uftX64: mtspr hsprg0,r14 ; Save a register in a Hypervisor SPRG
+ ld r14,UAW(r11) ; Get the User Assist DoubleWord
+ lwz r11,pfAvailable(r11) ; Get the feature flags
+ mfsprg r13,2 ; Restore R13
+ mtsprg 2,r11 ; Set the feature flags
+ mfsprg r11,3 ; Restore R11
+ mtsprg 3,r14 ; Set the UAW in sprg3
+ mfspr r14,hsprg0 ; Restore R14
+ rfid ; Back to our guy...
+
+;
+; Quickly cut a trace table entry for the CutTrace firmware call.
+;
+; All registers except R11 and R13 are unchanged.
+;
+; Note that this code cuts a trace table entry for the CutTrace call only.
+; An identical entry is made during normal interrupt processing. Any entry
+; format entry changes made must be done in both places.
+;
+
+ .align 5
+
+ .globl EXT(uft_cuttrace)
+LEXT(uft_cuttrace)
+uftCutTrace:
+ b uftct64 ; patched to NOP if 32-bit processor
+
+ stw r20,tempr0(r11) ; Save some work registers
+ lwz r20,dgFlags(0) ; Get the flags
+ stw r21,tempr1(r11) ; Save some work registers
+ mfsrr1 r21 ; Get the SRR1
+ rlwinm r20,r20,MSR_PR_BIT-enaUsrFCallb,MASK(MSR_PR) ; Shift the validity bit over to pr bit spot
+ stw r25,tempr2(r11) ; Save some work registers
+ orc r20,r20,r21 ; Get ~PR | FC
+ mfcr r25 ; Save the CR
+ stw r22,tempr3(r11) ; Save some work registers
+ lhz r22,PP_CPU_NUMBER(r11) ; Get the logical processor number
+ andi. r20,r20,MASK(MSR_PR) ; Set cr0_eq is we are in problem state and the validity bit is not set
+ stw r23,tempr4(r11) ; Save some work registers
+ lwz r23,traceMask(0) ; Get the trace mask
+ stw r24,tempr5(r11) ; Save some work registers
+ beq- ctbail32 ; Can not issue from user...
+
+
+ addi r24,r22,16 ; Get shift to move cpu mask to syscall mask
+ rlwnm r24,r23,r24,12,12 ; Shift cpu mask bit to rupt type mask
+ and. r24,r24,r23 ; See if both are on
+
+;
+; We select a trace entry using a compare and swap on the next entry field.
+; Since we do not lock the actual trace buffer, there is a potential that
+; another processor could wrap an trash our entry. Who cares?
+;
+
+ li r23,trcWork ; Get the trace work area address
+ lwz r21,traceStart(0) ; Get the start of trace table
+ lwz r22,traceEnd(0) ; Get end of trace table
+
+ beq-- ctdisa32 ; Leave because tracing is disabled...
+
+ctgte32: lwarx r20,0,r23 ; Get and reserve the next slot to allocate
+ addi r24,r20,LTR_size ; Point to the next trace entry
+ cmplw r24,r22 ; Do we need to wrap the trace table?
+ bne+ ctgte32s ; No wrap, we got us a trace entry...
+
+ mr r24,r21 ; Wrap back to start
+
+ctgte32s: stwcx. r24,0,r23 ; Try to update the current pointer
+ bne- ctgte32 ; Collision, try again...
+
+#if ESPDEBUG
+ dcbf 0,r23 ; Force to memory
+ sync
+#endif
+
+ dcbz 0,r20 ; Clear and allocate first trace line
+ li r24,32 ; Offset to next line
+
+ctgte32tb: mftbu r21 ; Get the upper time now
+ mftb r22 ; Get the lower time now
+ mftbu r23 ; Get upper again
+ cmplw r21,r23 ; Has it ticked?
+ bne- ctgte32tb ; Yes, start again...
+
+ dcbz r24,r20 ; Clean second line
+
+;
+; Let us cut that trace entry now.
+;
+; Note that this code cuts a trace table entry for the CutTrace call only.
+; An identical entry is made during normal interrupt processing. Any entry
+; format entry changes made must be done in both places.
+;
+
+ lhz r24,PP_CPU_NUMBER(r11) ; Get the logical processor number
+ li r23,T_SYSTEM_CALL ; Get the system call id
+ mtctr r13 ; Restore the caller's CTR
+ sth r24,LTR_cpu(r20) ; Save processor number
+ li r24,64 ; Offset to third line
+ sth r23,LTR_excpt(r20) ; Set the exception code
+ dcbz r24,r20 ; Clean 3rd line
+ mfspr r23,dsisr ; Get the DSISR
+ stw r21,LTR_timeHi(r20) ; Save top of time stamp
+ li r24,96 ; Offset to fourth line
+ mflr r21 ; Get the LR
+ dcbz r24,r20 ; Clean 4th line
+ stw r22,LTR_timeLo(r20) ; Save bottom of time stamp
+ mfsrr0 r22 ; Get SRR0
+ stw r25,LTR_cr(r20) ; Save CR
+ mfsrr1 r24 ; Get the SRR1
+ stw r23,LTR_dsisr(r20) ; Save DSISR
+ stw r22,LTR_srr0+4(r20) ; Save SRR0
+ mfdar r23 ; Get DAR
+ stw r24,LTR_srr1+4(r20) ; Save SRR1
+ stw r23,LTR_dar+4(r20) ; Save DAR
+ stw r21,LTR_lr+4(r20) ; Save LR
+
+ stw r13,LTR_ctr+4(r20) ; Save CTR
+ stw r0,LTR_r0+4(r20) ; Save register
+ stw r1,LTR_r1+4(r20) ; Save register
+ stw r2,LTR_r2+4(r20) ; Save register
+ stw r3,LTR_r3+4(r20) ; Save register
+ stw r4,LTR_r4+4(r20) ; Save register
+ stw r5,LTR_r5+4(r20) ; Save register
+ stw r6,LTR_r6+4(r20) ; Save register
+
+#if 0
+ lwz r21,FPUowner(r11) ; (TEST/DEBUG) Get the current floating point owner
+ stw r21,LTR_rsvd0(r20) ; (TEST/DEBUG) Record the owner
+#endif
+
+#if ESPDEBUG
+ addi r21,r20,32 ; Second line
+ addi r22,r20,64 ; Third line
+ dcbst 0,r20 ; Force to memory
+ dcbst 0,r21 ; Force to memory
+ addi r21,r22,32 ; Fourth line
+ dcbst 0,r22 ; Force to memory
+ dcbst 0,r21 ; Force to memory
+ sync ; Make sure it all goes
+#endif
+
+ctdisa32: mtcrf 0x80,r25 ; Restore the used condition register field
+ lwz r20,tempr0(r11) ; Restore work register
+ lwz r21,tempr1(r11) ; Restore work register
+ lwz r25,tempr2(r11) ; Restore work register
+ mtctr r13 ; Restore the caller's CTR
+ lwz r22,tempr3(r11) ; Restore work register
+ lwz r23,tempr4(r11) ; Restore work register
+ lwz r24,tempr5(r11) ; Restore work register
+ b uftX32 ; Go restore the rest and go...
+
+ctbail32: mtcrf 0x80,r25 ; Restore the used condition register field
+ lwz r20,tempr0(r11) ; Restore work register
+ lwz r21,tempr1(r11) ; Restore work register
+ lwz r25,tempr2(r11) ; Restore work register
+ mtctr r13 ; Restore the caller's CTR
+ lwz r22,tempr3(r11) ; Restore work register
+ lwz r23,tempr4(r11) ; Restore work register
+ b uftNormalSyscall ; Go pass it on along...
+
+;
+; This is the 64-bit version.
+;
+
+uftct64: std r20,tempr0(r11) ; Save some work registers
+ lwz r20,dgFlags(0) ; Get the flags
+ std r21,tempr1(r11) ; Save some work registers
+ mfsrr1 r21 ; Get the SRR1
+ rlwinm r20,r20,MSR_PR_BIT-enaUsrFCallb,MASK(MSR_PR) ; Shift the validity bit over to pr bit spot
+ std r25,tempr2(r11) ; Save some work registers
+ orc r20,r20,r21 ; Get ~PR | FC
+ mfcr r25 ; Save the CR
+ std r22,tempr3(r11) ; Save some work registers
+ lhz r22,PP_CPU_NUMBER(r11) ; Get the logical processor number
+ andi. r20,r20,MASK(MSR_PR) ; Set cr0_eq when we are in problem state and the validity bit is not set
+ std r23,tempr4(r11) ; Save some work registers
+ lwz r23,traceMask(0) ; Get the trace mask
+ std r24,tempr5(r11) ; Save some work registers
+ beq-- ctbail64 ; Can not issue from user...
+
+ addi r24,r22,16 ; Get shift to move cpu mask to syscall mask
+ rlwnm r24,r23,r24,12,12 ; Shift cpu mask bit to rupt type mask
+ and. r24,r24,r23 ; See if both are on
+
+;
+; We select a trace entry using a compare and swap on the next entry field.
+; Since we do not lock the actual trace buffer, there is a potential that
+; another processor could wrap an trash our entry. Who cares?
+;
+
+ li r23,trcWork ; Get the trace work area address
+ lwz r21,traceStart(0) ; Get the start of trace table
+ lwz r22,traceEnd(0) ; Get end of trace table
+
+ beq-- ctdisa64 ; Leave because tracing is disabled...
+
+ctgte64: lwarx r20,0,r23 ; Get and reserve the next slot to allocate
+ addi r24,r20,LTR_size ; Point to the next trace entry
+ cmplw r24,r22 ; Do we need to wrap the trace table?
+ bne++ ctgte64s ; No wrap, we got us a trace entry...
+
+ mr r24,r21 ; Wrap back to start
+
+ctgte64s: stwcx. r24,0,r23 ; Try to update the current pointer
+ bne-- ctgte64 ; Collision, try again...
+
+#if ESPDEBUG
+ dcbf 0,r23 ; Force to memory
+ sync
+#endif
+
+ dcbz128 0,r20 ; Zap the trace entry
+
+ mftb r21 ; Get the time
+
+;
+; Let us cut that trace entry now.
+;
+; Note that this code cuts a trace table entry for the CutTrace call only.
+; An identical entry is made during normal interrupt processing. Any entry
+; format entry changes made must be done in both places.
+;
+
+ lhz r24,PP_CPU_NUMBER(r11) ; Get the logical processor number
+ li r23,T_SYSTEM_CALL ; Get the system call id
+ sth r24,LTR_cpu(r20) ; Save processor number
+ sth r23,LTR_excpt(r20) ; Set the exception code
+ mfspr r23,dsisr ; Get the DSISR
+ std r21,LTR_timeHi(r20) ; Save top of time stamp
+ mflr r21 ; Get the LR
+ mfsrr0 r22 ; Get SRR0
+ stw r25,LTR_cr(r20) ; Save CR
+ mfsrr1 r24 ; Get the SRR1
+ stw r23,LTR_dsisr(r20) ; Save DSISR
+ std r22,LTR_srr0(r20) ; Save SRR0
+ mfdar r23 ; Get DAR
+ std r24,LTR_srr1(r20) ; Save SRR1
+ std r23,LTR_dar(r20) ; Save DAR
+ std r21,LTR_lr(r20) ; Save LR
+
+ std r13,LTR_ctr(r20) ; Save CTR
+ std r0,LTR_r0(r20) ; Save register
+ std r1,LTR_r1(r20) ; Save register
+ std r2,LTR_r2(r20) ; Save register
+ std r3,LTR_r3(r20) ; Save register
+ std r4,LTR_r4(r20) ; Save register
+ std r5,LTR_r5(r20) ; Save register
+ std r6,LTR_r6(r20) ; Save register
+
+#if 0
+ lwz r21,FPUowner(r11) ; (TEST/DEBUG) Get the current floating point owner
+ stw r21,LTR_rsvd0(r20) ; (TEST/DEBUG) Record the owner
+#endif
+
+#if ESPDEBUG
+ dcbf 0,r20 ; Force to memory
+ sync ; Make sure it all goes
+#endif
+
+ctdisa64: mtcrf 0x80,r25 ; Restore the used condition register field
+ ld r20,tempr0(r11) ; Restore work register
+ ld r21,tempr1(r11) ; Restore work register
+ ld r25,tempr2(r11) ; Restore work register
+ mtctr r13 ; Restore the caller's CTR
+ ld r22,tempr3(r11) ; Restore work register
+ ld r23,tempr4(r11) ; Restore work register
+ ld r24,tempr5(r11) ; Restore work register
+ b uftX64 ; Go restore the rest and go...
+
+ctbail64: mtcrf 0x80,r25 ; Restore the used condition register field
+ ld r20,tempr0(r11) ; Restore work register
+ ld r21,tempr1(r11) ; Restore work register
+ ld r25,tempr2(r11) ; Restore work register
+ mtctr r13 ; Restore the caller's CTR
+ ld r22,tempr3(r11) ; Restore work register
+ ld r23,tempr4(r11) ; Restore work register
+ li r11,T_SYSTEM_CALL|T_FAM ; Set system code call
+ b extEntry64 ; Go straight to the 64-bit code...
+
+
+
+; Handle a system call that is not a UFT and which thus goes upstairs.
+
+uftNormalFF: ; here with entire cr in r13
+ mtcr r13 ; restore all 8 fields
+ b uftNormalSyscall1 ; Join common...
+
+uftNormal80: ; here with callers cr0 in r13
+ mtcrf 0x80,r13 ; restore cr0
+ b uftNormalSyscall1 ; Join common...
+
+uftNormalSyscall: ; r13 = callers ctr
+ mtctr r13 ; restore ctr
+uftNormalSyscall1:
+ li r11,T_SYSTEM_CALL|T_FAM ; this is a system call (and fall through)
+
+
+/*<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>*/
+/*
+ * .L_exception_entry(type)
+ *
+ * Come here via branch directly from the vector, or falling down from above, with the following
+ * set up:
+ *
+ * ENTRY: interrupts off, VM off, in 64-bit mode if supported
+ * Caller's r13 saved in sprg2.
+ * Caller's r11 saved in sprg3.
+ * Exception code (ie, T_SYSTEM_CALL etc) in r11.
+ * All other registers are live.
+ *
+ */
+
+.L_exception_entry: ; WARNING: can fall through from UFT handler
+
+/*
+ *
+ * Here we will save off a mess of registers, the special ones and R0-R12. We use the DCBZ
+ * instruction to clear and allcoate a line in the cache. This way we won't take any cache
+ * misses, so these stores won't take all that long. Except the first line that is because
+ * we can't do a DCBZ if the L1 D-cache is off. The rest we will skip if they are
+ * off also.
+ *
+ * Note that if we are attempting to sleep (as opposed to nap or doze) all interruptions
+ * are ignored.
+ */
+
+
+ .globl EXT(extPatch32)
+
+
+LEXT(extPatch32)
+ b extEntry64 ; Go do 64-bit (patched to a nop if 32-bit)
+ mfsprg r13,0 ; Load per_proc
+ lwz r13,next_savearea+4(r13) ; Get the exception save area
+ stw r0,saver0+4(r13) ; Save register 0
+ stw r1,saver1+4(r13) ; Save register 1
+
+ mfspr r1,hid0 ; Get HID0
+ mfcr r0 ; Save the whole CR
+
+ mtcrf 0x20,r1 ; Get set to test for sleep
+ cror doze,doze,nap ; Remember if we are napping
+ bf sleep,notsleep ; Skip if we are not trying to sleep
+
+ mtcrf 0x20,r0 ; Restore the CR
+ lwz r0,saver0+4(r13) ; Restore R0
+ lwz r1,saver1+4(r13) ; Restore R1
+ mfsprg r13,0 ; Get the per_proc
+ lwz r11,pfAvailable(r13) ; Get back the feature flags
+ mfsprg r13,2 ; Restore R13
+ mtsprg 2,r11 ; Set sprg2 to the features
+ mfsprg r11,3 ; Restore R11
+ rfi ; Jump back into sleep code...
.long 0 ; Leave these here please...
.long 0
.long 0
.long 0
.long 0
+
+;
+; This is the 32-bit context saving stuff
+;
+
.align 5
-notsleep: stw r2,saver2(r13) ; Save this one
- crmove featL1ena,dce ; Copy the cache enable bit
+notsleep: stw r2,saver2+4(r13) ; Save this one
+ bf doze,notspdo ; Skip the next if we are not napping/dozing...
rlwinm r2,r1,0,nap+1,doze-1 ; Clear any possible nap and doze bits
mtspr hid0,r2 ; Clear the nap/doze bits
- cmplw r2,r1 ; See if we were napping
- li r1,32 ; Point to the next line in case we need it
- crnot wasNapping,cr0_eq ; Remember if we were napping
+notspdo:
+
+#if INSTRUMENT
+ mfspr r2,pmc1 ; INSTRUMENT - saveinstr[0] - Take earliest possible stamp
+ stw r2,0x6100+(0x00*16)+0x0(0) ; INSTRUMENT - Save it
+ mfspr r2,pmc2 ; INSTRUMENT - Get stamp
+ stw r2,0x6100+(0x00*16)+0x4(0) ; INSTRUMENT - Save it
+ mfspr r2,pmc3 ; INSTRUMENT - Get stamp
+ stw r2,0x6100+(0x00*16)+0x8(0) ; INSTRUMENT - Save it
+ mfspr r2,pmc4 ; INSTRUMENT - Get stamp
+ stw r2,0x6100+(0x00*16)+0xC(0) ; INSTRUMENT - Save it
+#endif
+
+ la r1,saver4(r13) ; Point to the next line in case we need it
+ crmove wasNapping,doze ; Remember if we were napping
mfsprg r2,0 ; Get the per_proc area
- bf- featL1ena,skipz1 ; L1 cache is disabled...
- dcbz r1,r13 ; Reserve our line in cache
+ dcbz 0,r1 ; allocate r4-r7 32-byte line in cache
;
; Remember, we are setting up CR6 with feature flags
;
-skipz1: lwz r1,pfAvailable(r2) ; Get the CPU features flags
- stw r3,saver3(r13) ; Save this one
- mtcrf 0xE0,r1 ; Put the features flags (that we care about) in the CR
- stw r4,saver4(r13) ; Save this one
- stw r6,saver6(r13) ; Save this one
- crmove featSMP,pfSMPcapb ; See if we have a PIR
- stw r8,saver8(r13) ; Save this one
+ andi. r1,r11,T_FAM ; Check FAM bit
+
+ stw r3,saver3+4(r13) ; Save this one
+ stw r4,saver4+4(r13) ; Save this one
+ andc r11,r11,r1 ; Clear FAM bit
+ beq+ noFAM ; Is it FAM intercept
+ mfsrr1 r3 ; Load srr1
+ rlwinm. r3,r3,0,MSR_PR_BIT,MSR_PR_BIT ; Are we trapping from supervisor state?
+ beq+ noFAM ; From supervisor state
+ lwz r1,spcFlags(r2) ; Load spcFlags
+ rlwinm r1,r1,1+FamVMmodebit,30,31 ; Extract FamVMenabit and FamVMmodebit
+ cmpwi cr0,r1,2 ; Check FamVMena set without FamVMmode
+ bne+ noFAM ; Can this context be FAM intercept
+ lwz r4,FAMintercept(r2) ; Load exceptions mask to intercept
+ srwi r1,r11,2 ; divide r11 by 4
+ lis r3,0x8000 ; Set r3 to 0x80000000
+ srw r1,r3,r1 ; Set bit for current exception
+ and. r1,r1,r4 ; And current exception with the intercept mask
+ beq+ noFAM ; Is it FAM intercept
+ b EXT(vmm_fam_exc)
+noFAM:
+ lwz r1,pfAvailable(r2) ; Get the CPU features flags
+ la r3,saver8(r13) ; Point to line with r8-r11
+ mtcrf 0xE2,r1 ; Put the features flags (that we care about) in the CR
+ dcbz 0,r3 ; allocate r8-r11 32-byte line in cache
+ la r3,saver12(r13) ; point to r12-r15 line
+ lis r4,hi16(MASK(MSR_VEC)|MASK(MSR_FP)|MASK(MSR_ME)) ; Set up the MSR we will use throughout. Note that ME come on here if MCK
+ stw r6,saver6+4(r13) ; Save this one
+ ori r4,r4,lo16(MASK(MSR_VEC)|MASK(MSR_FP)|MASK(MSR_ME)) ; Rest of MSR
+ stw r8,saver8+4(r13) ; Save this one
crmove featAltivec,pfAltivecb ; Set the Altivec flag
- mfsrr0 r6 /* Get the interruption SRR0 */
- stw r8,saver8(r13) /* Save this one */
- crmove featFP,pfFloatb ; Remember that we have floating point
- stw r7,saver7(r13) /* Save this one */
+ mtmsr r4 ; Set MSR
+ isync
+ mfsrr0 r6 ; Get the interruption SRR0
+ la r8,savesrr0(r13) ; point to line with SRR0, SRR1, CR, XER, and LR
+ dcbz 0,r3 ; allocate r12-r15 32-byte line in cache
+ la r3,saver16(r13) ; point to next line
+ dcbz 0,r8 ; allocate 32-byte line with SRR0, SRR1, CR, XER, and LR
+ stw r7,saver7+4(r13) ; Save this one
lhz r8,PP_CPU_FLAGS(r2) ; Get the flags
- mfsrr1 r7 /* Get the interrupt SRR1 */
+ mfsrr1 r7 ; Get the interrupt SRR1
rlwinm r8,r8,(((31-MSR_BE_BIT)+(traceBEb+16+1))&31),MSR_BE_BIT,MSR_BE_BIT ; Set BE bit if special trace is on
- stw r6,savesrr0(r13) /* Save the SRR0 */
+ stw r6,savesrr0+4(r13) ; Save the SRR0
rlwinm r6,r7,(((31-MSR_BE_BIT)+(MSR_PR_BIT+1))&31),MSR_BE_BIT,MSR_BE_BIT ; Move PR bit to BE bit
- stw r5,saver5(r13) /* Save this one */
+ stw r5,saver5+4(r13) ; Save this one
and r8,r6,r8 ; Remove BE bit only if problem state and special tracing on
mfsprg r6,2 ; Get interrupt time R13
mtsprg 2,r1 ; Set the feature flags
andc r7,r7,r8 ; Clear BE bit if special trace is on and PR is set
- mfsprg r8,3 /* Get 'rupt time R11 */
- stw r7,savesrr1(r13) /* Save SRR1 */
- stw r6,saver13(r13) /* Save 'rupt R1 */
- stw r8,saver11(r13) /* Save 'rupt time R11 */
+ mfsprg r8,3 ; Get rupt time R11
+ stw r7,savesrr1+4(r13) ; Save SRR1
+ stw r8,saver11+4(r13) ; Save rupt time R11
+ stw r6,saver13+4(r13) ; Save rupt R13
+ dcbz 0,r3 ; allocate 32-byte line with r16-r19
+ la r3,saver20(r13) ; point to next line
getTB: mftbu r6 ; Get the upper timebase
mftb r7 ; Get the lower timebase
cmplw r6,r8 ; Did the top tick?
bne- getTB ; Yeah, need to get it again...
+#if INSTRUMENT
+ mfspr r6,pmc1 ; INSTRUMENT - saveinstr[1] - Save halfway context save stamp
+ stw r6,0x6100+(0x01*16)+0x0(0) ; INSTRUMENT - Save it
+ mfspr r6,pmc2 ; INSTRUMENT - Get stamp
+ stw r6,0x6100+(0x01*16)+0x4(0) ; INSTRUMENT - Save it
+ mfspr r6,pmc3 ; INSTRUMENT - Get stamp
+ stw r6,0x6100+(0x01*16)+0x8(0) ; INSTRUMENT - Save it
+ mfspr r6,pmc4 ; INSTRUMENT - Get stamp
+ stw r6,0x6100+(0x01*16)+0xC(0) ; INSTRUMENT - Save it
+#endif
+
stw r8,ruptStamp(r2) ; Save the top of time stamp
- la r6,saver14(r13) ; Point to the next cache line
+ stw r8,SAVtime(r13) ; Save the top of time stamp
stw r7,ruptStamp+4(r2) ; Save the bottom of time stamp
- bf- featL1ena,skipz2 ; L1 cache is disabled...
- dcbz 0,r6 /* Allocate in cache */
-skipz2:
- stw r9,saver9(r13) /* Save this one */
-
- la r9,saver30(r13) /* Point to the trailing end */
- stw r10,saver10(r13) /* Save this one */
- mflr r4 /* Get the LR */
+ stw r7,SAVtime+4(r13) ; Save the bottom of time stamp
+
+ dcbz 0,r3 ; allocate 32-byte line with r20-r23
+ stw r9,saver9+4(r13) ; Save this one
+
+ stw r10,saver10+4(r13) ; Save this one
+ mflr r4 ; Get the LR
mfxer r10 ; Get the XER
bf+ wasNapping,notNapping ; Skip if not waking up from nap...
adde r8,r8,r5 ; Add high and carry to total
stw r6,napTotal+4(r2) ; Save the low total
stw r8,napTotal(r2) ; Save the high total
- stw r3,savesrr0(r13) ; Modify to return to nap/doze exit
+ stw r3,savesrr0+4(r13) ; Modify to return to nap/doze exit
-notNapping: stw r12,saver12(r13) /* Save this one */
+ rlwinm. r3,r1,0,pfSlowNapb,pfSlowNapb ; Should HID1 be restored?
+ beq notInSlowNap
+
+ lwz r3,pfHID1(r2) ; Get saved HID1 value
+ mtspr hid1,r3 ; Restore HID1
+
+notInSlowNap:
+ rlwinm. r3,r1,0,pfNoL2PFNapb,pfNoL2PFNapb ; Should MSSCR0 be restored?
+ beq notNapping
+
+ lwz r3,pfMSSCR0(r2) ; Get saved MSSCR0 value
+ mtspr msscr0,r3 ; Restore MSSCR0
+ sync
+ isync
+
+notNapping: stw r12,saver12+4(r13) ; Save this one
- bf- featL1ena,skipz3 ; L1 cache is disabled...
- dcbz 0,r9 /* Allocate the last in the area */
-skipz3:
- stw r14,saver14(r13) /* Save this one */
- stw r15,saver15(r13) /* Save this one */
- la r14,saver22(r13) /* Point to the next block to save into */
+ stw r14,saver14+4(r13) ; Save this one
+ stw r15,saver15+4(r13) ; Save this one
+ la r14,saver24(r13) ; Point to the next block to save into
+ mfctr r6 ; Get the CTR
+ stw r16,saver16+4(r13) ; Save this one
+ la r15,savectr(r13) ; point to line with CTR, DAR, DSISR, Exception code, and VRSAVE
+ stw r4,savelr+4(r13) ; Save rupt LR
+
+ dcbz 0,r14 ; allocate 32-byte line with r24-r27
+ la r16,saver28(r13) ; point to line with r28-r31
+ dcbz 0,r15 ; allocate line with CTR, DAR, DSISR, Exception code, and VRSAVE
+ stw r17,saver17+4(r13) ; Save this one
+ stw r18,saver18+4(r13) ; Save this one
+ stw r6,savectr+4(r13) ; Save rupt CTR
stw r0,savecr(r13) ; Save rupt CR
- mfctr r6 /* Get the CTR */
- stw r16,saver16(r13) /* Save this one */
- stw r4,savelr(r13) /* Save 'rupt LR */
+ stw r19,saver19+4(r13) ; Save this one
+ mfdar r6 ; Get the rupt DAR
+ stw r20,saver20+4(r13) ; Save this one
+ dcbz 0,r16 ; allocate 32-byte line with r28-r31
+
+ stw r21,saver21+4(r13) ; Save this one
+ lwz r21,spcFlags(r2) ; Get the special flags from per_proc
+ stw r10,savexer+4(r13) ; Save the rupt XER
+ stw r30,saver30+4(r13) ; Save this one
+ lhz r30,pfrptdProc(r2) ; Get the reported processor type
+ stw r31,saver31+4(r13) ; Save this one
+ stw r22,saver22+4(r13) ; Save this one
+ stw r23,saver23+4(r13) ; Save this one
+ stw r24,saver24+4(r13) ; Save this one
+ stw r25,saver25+4(r13) ; Save this one
+ mfdsisr r7 ; Get the rupt DSISR
+ stw r26,saver26+4(r13) ; Save this one
+ stw r27,saver27+4(r13) ; Save this one
+ andis. r21,r21,hi16(perfMonitor) ; Is the performance monitor enabled?
+ stw r28,saver28+4(r13) ; Save this one
+ cmpwi cr1, r30,CPU_SUBTYPE_POWERPC_750 ; G3?
+ la r27,savevscr(r13) ; point to 32-byte line with VSCR and FPSCR
+ cmpwi cr2,r30,CPU_SUBTYPE_POWERPC_7400 ; This guy?
+ stw r29,saver29+4(r13) ; Save R29
+ stw r6,savedar+4(r13) ; Save the rupt DAR
+ li r10,savepmc ; Point to pmc savearea
+
+ beq+ noPerfMonSave32 ; No perfmon on here...
+
+ dcbz r10,r13 ; Clear first part of pmc area
+ li r10,savepmc+0x20 ; Point to pmc savearea second part
+ li r22,0 ; r22: zero
+ dcbz r10,r13 ; Clear second part of pmc area
- bf- featL1ena,skipz4 ; L1 cache is disabled...
- dcbz 0,r14 /* Allocate next save area line */
-skipz4:
- stw r17,saver17(r13) /* Save this one */
- stw r18,saver18(r13) /* Save this one */
- stw r6,savectr(r13) /* Save 'rupt CTR */
- stw r19,saver19(r13) /* Save this one */
- lis r12,HIGH_ADDR(KERNEL_SEG_REG0_VALUE) /* Get the high half of the kernel SR0 value */
- mfdar r6 /* Get the 'rupt DAR */
- stw r20,saver20(r13) /* Save this one */
-#if 0
- mfsr r14,sr0 ; (TEST/DEBUG)
- stw r14,savesr0(r13) ; (TEST/DEBUG)
- mfsr r14,sr1 ; (TEST/DEBUG)
- stw r14,savesr1(r13) ; (TEST/DEBUG)
- mfsr r14,sr2 ; (TEST/DEBUG)
- stw r14,savesr2(r13) ; (TEST/DEBUG)
- mfsr r14,sr3 ; (TEST/DEBUG)
- stw r14,savesr3(r13) ; (TEST/DEBUG)
- mfsr r14,sr4 ; (TEST/DEBUG)
- stw r14,savesr4(r13) ; (TEST/DEBUG)
- mfsr r14,sr5 ; (TEST/DEBUG)
- stw r14,savesr5(r13) ; (TEST/DEBUG)
- mfsr r14,sr6 ; (TEST/DEBUG)
- stw r14,savesr6(r13) ; (TEST/DEBUG)
- mfsr r14,sr7 ; (TEST/DEBUG)
- stw r14,savesr7(r13) ; (TEST/DEBUG)
- mfsr r14,sr8 ; (TEST/DEBUG)
- stw r14,savesr8(r13) ; (TEST/DEBUG)
- mfsr r14,sr9 ; (TEST/DEBUG)
- stw r14,savesr9(r13) ; (TEST/DEBUG)
- mfsr r14,sr10 ; (TEST/DEBUG)
- stw r14,savesr10(r13) ; (TEST/DEBUG)
- mfsr r14,sr11 ; (TEST/DEBUG)
- stw r14,savesr11(r13) ; (TEST/DEBUG)
- mfsr r14,sr12 ; (TEST/DEBUG)
- stw r14,savesr12(r13) ; (TEST/DEBUG)
- mfsr r14,sr13 ; (TEST/DEBUG)
- stw r14,savesr13(r13) ; (TEST/DEBUG)
- mfsr r14,sr15 ; (TEST/DEBUG)
- stw r14,savesr15(r13) ; (TEST/DEBUG)
+ beq cr1,perfMonSave32_750 ; This is a G3...
+
+ beq cr2,perfMonSave32_7400 ; Regular olde G4...
+
+ mfspr r24,pmc5 ; Here for a 7450
+ mfspr r25,pmc6
+ stw r24,savepmc+16(r13) ; Save PMC5
+ stw r25,savepmc+20(r13) ; Save PMC6
+ mtspr pmc5,r22 ; Leave PMC5 clear
+ mtspr pmc6,r22 ; Leave PMC6 clear
+
+perfMonSave32_7400:
+ mfspr r25,mmcr2
+ stw r25,savemmcr2+4(r13) ; Save MMCR2
+ mtspr mmcr2,r22 ; Leave MMCR2 clear
+
+perfMonSave32_750:
+ mfspr r23,mmcr0
+ mfspr r24,mmcr1
+ stw r23,savemmcr0+4(r13) ; Save MMCR0
+ stw r24,savemmcr1+4(r13) ; Save MMCR1
+ mtspr mmcr0,r22 ; Leave MMCR0 clear
+ mtspr mmcr1,r22 ; Leave MMCR1 clear
+ mfspr r23,pmc1
+ mfspr r24,pmc2
+ mfspr r25,pmc3
+ mfspr r26,pmc4
+ stw r23,savepmc+0(r13) ; Save PMC1
+ stw r24,savepmc+4(r13) ; Save PMC2
+ stw r25,savepmc+8(r13) ; Save PMC3
+ stw r26,savepmc+12(r13) ; Save PMC4
+ mtspr pmc1,r22 ; Leave PMC1 clear
+ mtspr pmc2,r22 ; Leave PMC2 clear
+ mtspr pmc3,r22 ; Leave PMC3 clear
+ mtspr pmc4,r22 ; Leave PMC4 clear
+
+noPerfMonSave32:
+ dcbz 0,r27 ; allocate line with VSCR and FPSCR
+
+ stw r7,savedsisr(r13) ; Save the rupt code DSISR
+ stw r11,saveexception(r13) ; Save the exception code
+
+
+;
+; Everything is saved at this point, except for FPRs, and VMX registers.
+; Time for us to get a new savearea and then trace interrupt if it is enabled.
+;
+
+ lwz r25,traceMask(0) ; Get the trace mask
+ li r0,SAVgeneral ; Get the savearea type value
+ lhz r19,PP_CPU_NUMBER(r2) ; Get the logical processor number
+ rlwinm r22,r11,30,0,31 ; Divide interrupt code by 4
+ stb r0,SAVflags+2(r13) ; Mark valid context
+ addi r22,r22,10 ; Adjust code so we shift into CR5
+ li r23,trcWork ; Get the trace work area address
+ rlwnm r7,r25,r22,22,22 ; Set CR5_EQ bit position to 0 if tracing allowed
+ li r26,0x8 ; Get start of cpu mask
+ srw r26,r26,r19 ; Get bit position of cpu number
+ mtcrf 0x04,r7 ; Set CR5 to show trace or not
+ and. r26,r26,r25 ; See if we trace this cpu
+ crandc cr5_eq,cr5_eq,cr0_eq ; Turn off tracing if cpu is disabled
+;
+; At this point, we can take another exception and lose nothing.
+;
+
+#if INSTRUMENT
+ mfspr r26,pmc1 ; INSTRUMENT - saveinstr[2] - Take stamp after save is done
+ stw r26,0x6100+(0x02*16)+0x0(0) ; INSTRUMENT - Save it
+ mfspr r26,pmc2 ; INSTRUMENT - Get stamp
+ stw r26,0x6100+(0x02*16)+0x4(0) ; INSTRUMENT - Save it
+ mfspr r26,pmc3 ; INSTRUMENT - Get stamp
+ stw r26,0x6100+(0x02*16)+0x8(0) ; INSTRUMENT - Save it
+ mfspr r26,pmc4 ; INSTRUMENT - Get stamp
+ stw r26,0x6100+(0x02*16)+0xC(0) ; INSTRUMENT - Save it
+#endif
+
+ bne+ cr5,xcp32xit ; Skip all of this if no tracing here...
+
+;
+; We select a trace entry using a compare and swap on the next entry field.
+; Since we do not lock the actual trace buffer, there is a potential that
+; another processor could wrap an trash our entry. Who cares?
+;
+
+ lwz r25,traceStart(0) ; Get the start of trace table
+ lwz r26,traceEnd(0) ; Get end of trace table
+
+trcsel: lwarx r20,0,r23 ; Get and reserve the next slot to allocate
+
+ addi r22,r20,LTR_size ; Point to the next trace entry
+ cmplw r22,r26 ; Do we need to wrap the trace table?
+ bne+ gotTrcEnt ; No wrap, we got us a trace entry...
+
+ mr r22,r25 ; Wrap back to start
+
+gotTrcEnt: stwcx. r22,0,r23 ; Try to update the current pointer
+ bne- trcsel ; Collision, try again...
+
+#if ESPDEBUG
+ dcbf 0,r23 ; Force to memory
+ sync
#endif
+
+ dcbz 0,r20 ; Clear and allocate first trace line
- mtsr sr0,r12 /* Set the kernel SR0 */
- stw r21,saver21(r13) /* Save this one */
- addis r12,r12,0x0010 ; Point to the second segment of kernel
- stw r10,savexer(r13) ; Save the rupt XER
- mtsr sr1,r12 /* Set the kernel SR1 */
- stw r30,saver30(r13) /* Save this one */
- addis r12,r12,0x0010 ; Point to the third segment of kernel
- stw r31,saver31(r13) /* Save this one */
- mtsr sr2,r12 /* Set the kernel SR2 */
- stw r22,saver22(r13) /* Save this one */
- addis r12,r12,0x0010 ; Point to the third segment of kernel
- la r10,savedar(r13) /* Point to exception info block */
- stw r23,saver23(r13) /* Save this one */
- mtsr sr3,r12 /* Set the kernel SR3 */
- stw r24,saver24(r13) /* Save this one */
- stw r25,saver25(r13) /* Save this one */
- mfdsisr r7 /* Get the 'rupt DSISR */
- stw r26,saver26(r13) /* Save this one */
-
- bf- featL1ena,skipz5 ; L1 cache is disabled...
- dcbz 0,r10 /* Allocate exception info line */
-skipz5:
+;
+; Let us cut that trace entry now.
+;
+; Note that this code cuts a trace table entry for everything but the CutTrace call.
+; An identical entry is made during normal CutTrace processing. Any entry
+; format changes made must be done in both places.
+;
+
+ lwz r16,ruptStamp(r2) ; Get top of time base
+ lwz r17,ruptStamp+4(r2) ; Get the bottom of time stamp
+
+ li r14,32 ; Offset to second line
+
+ lwz r0,saver0+4(r13) ; Get back interrupt time R0
+ lwz r1,saver1+4(r13) ; Get back interrupt time R1
+ lwz r8,savecr(r13) ; Get the CR value
+
+ dcbz r14,r20 ; Zap the second line
+
+ sth r19,LTR_cpu(r20) ; Stash the cpu number
+ li r14,64 ; Offset to third line
+ sth r11,LTR_excpt(r20) ; Save the exception type
+ lwz r7,saver2+4(r13) ; Get back interrupt time R2
+ lwz r3,saver3+4(r13) ; Restore this one
- stw r27,saver27(r13) /* Save this one */
+ dcbz r14,r20 ; Zap the third half
+
+ mfdsisr r9 ; Get the DSISR
+ li r14,96 ; Offset to forth line
+ stw r16,LTR_timeHi(r20) ; Set the upper part of TB
+ stw r17,LTR_timeLo(r20) ; Set the lower part of TB
+ lwz r10,savelr+4(r13) ; Get the LR
+ mfsrr0 r17 ; Get SRR0 back, it is still good
+
+ dcbz r14,r20 ; Zap the forth half
+ lwz r4,saver4+4(r13) ; Restore this one
+ lwz r5,saver5+4(r13) ; Restore this one
+ mfsrr1 r18 ; SRR1 is still good in here
+
+ stw r8,LTR_cr(r20) ; Save the CR
+ lwz r6,saver6+4(r13) ; Get R6
+ mfdar r16 ; Get this back
+ stw r9,LTR_dsisr(r20) ; Save the DSISR
+ stw r17,LTR_srr0+4(r20) ; Save the SSR0
+
+ stw r18,LTR_srr1+4(r20) ; Save the SRR1
+ stw r16,LTR_dar+4(r20) ; Save the DAR
+ mfctr r17 ; Get the CTR (still good in register)
+ stw r13,LTR_save+4(r20) ; Save the savearea
+ stw r10,LTR_lr+4(r20) ; Save the LR
+
+ stw r17,LTR_ctr+4(r20) ; Save off the CTR
+ stw r0,LTR_r0+4(r20) ; Save off register 0
+ stw r1,LTR_r1+4(r20) ; Save off register 1
+ stw r7,LTR_r2+4(r20) ; Save off register 2
+
+
+ stw r3,LTR_r3+4(r20) ; Save off register 3
+ stw r4,LTR_r4+4(r20) ; Save off register 4
+ stw r5,LTR_r5+4(r20) ; Save off register 5
+ stw r6,LTR_r6+4(r20) ; Save off register 6
+
+#if ESPDEBUG
+ addi r17,r20,32 ; Second line
+ addi r16,r20,64 ; Third line
+ dcbst br0,r20 ; Force to memory
+ dcbst br0,r17 ; Force to memory
+ addi r17,r17,32 ; Fourth line
+ dcbst br0,r16 ; Force to memory
+ dcbst br0,r17 ; Force to memory
+
+ sync ; Make sure it all goes
+#endif
+xcp32xit: mr r14,r11 ; Save the interrupt code across the call
+ bl EXT(save_get_phys_32) ; Grab a savearea
+ mfsprg r2,0 ; Get the per_proc info
li r10,emfp0 ; Point to floating point save
- stw r28,saver28(r13) /* Save this one */
- stw r29,saver29(r13) /* Save this one */
- mfsr r14,sr14 ; Get the copyin/out segment register
- stw r6,savedar(r13) /* Save the 'rupt DAR */
- bf- featL1ena,skipz5a ; Do not do this if no L1...
- dcbz r10,r2 ; Clear and allocate an L1 slot
-
-skipz5a: stw r7,savedsisr(r13) /* Save the 'rupt code DSISR */
- stw r11,saveexception(r13) /* Save the exception code */
- stw r14,savesr14(r13) ; Save copyin/copyout
-
- lis r8,HIGH_ADDR(EXT(saveanchor)) /* Get the high part of the anchor */
- li r19,0 ; Assume no Altivec
- ori r8,r8,LOW_ADDR(EXT(saveanchor)) /* Bottom half of the anchor */
+ mr r11,r14 ; Get the exception code back
+ dcbz r10,r2 ; Clear for speed
+ stw r3,next_savearea+4(r2) ; Store the savearea for the next rupt
+
+#if INSTRUMENT
+ mfspr r4,pmc1 ; INSTRUMENT - saveinstr[3] - Take stamp after next savearea
+ stw r4,0x6100+(0x03*16)+0x0(0) ; INSTRUMENT - Save it
+ mfspr r4,pmc2 ; INSTRUMENT - Get stamp
+ stw r4,0x6100+(0x03*16)+0x4(0) ; INSTRUMENT - Save it
+ mfspr r4,pmc3 ; INSTRUMENT - Get stamp
+ stw r4,0x6100+(0x03*16)+0x8(0) ; INSTRUMENT - Save it
+ mfspr r4,pmc4 ; INSTRUMENT - Get stamp
+ stw r4,0x6100+(0x03*16)+0xC(0) ; INSTRUMENT - Save it
+#endif
+ b xcpCommon ; Go join the common interrupt processing...
+
+;
+;
+; This is the 64-bit context saving stuff
+;
+
+ .align 5
+
+extEntry64: mfsprg r13,0 ; Load per_proc
+ ld r13,next_savearea(r13) ; Get the exception save area
+ std r0,saver0(r13) ; Save register 0
+ lis r0,hi16(MASK(MSR_VEC)|MASK(MSR_FP)|MASK(MSR_ME)) ; Set up the MSR we will use throughout. Note that ME come on here if MCK
+ std r1,saver1(r13) ; Save register 1
+ ori r1,r0,lo16(MASK(MSR_VEC)|MASK(MSR_FP)|MASK(MSR_ME)) ; Rest of MSR
+ lis r0,0x0010 ; Get rupt code transform validity mask
+ mtmsr r1 ; Set MSR
+ isync
+
+ ori r0,r0,0x0200 ; Get rupt code transform validity mask
+ std r2,saver2(r13) ; Save this one
+ lis r1,0x00F0 ; Top half of xform XOR
+ rlwinm r2,r11,29,27,31 ; Get high 5 bits of rupt code
+ std r3,saver3(r13) ; Save this one
+ slw r0,r0,r2 ; Move transform validity bit to bit 0
+ std r4,saver4(r13) ; Save this one
+ std r5,saver5(r13) ; Save this one
+ ori r1,r1,0x04EC ; Bottom half of xform XOR
+ mfxer r5 ; Save the XER because we are about to muck with it
+ rlwinm r4,r11,1,27,28 ; Get bottom of interrupt code * 8
+ lis r3,hi16(dozem|napm) ; Get the nap and doze bits
+ srawi r0,r0,31 ; Get 0xFFFFFFFF of xform valid, 0 otherwise
+ rlwnm r4,r1,r4,24,31 ; Extract the xform XOR
+ li r1,saver16 ; Point to the next line
+ and r4,r4,r0 ; Only keep transform if we are to use it
+ li r2,lgKillResv ; Point to the killing field
+ mfcr r0 ; Save the CR
+ stwcx. r2,0,r2 ; Kill any pending reservation
+ dcbz128 r1,r13 ; Blow away the line
+ sldi r3,r3,32 ; Position it
+ mfspr r1,hid0 ; Get HID0
+ andc r3,r1,r3 ; Clear nap and doze
+ xor r11,r11,r4 ; Transform 970 rupt code to standard keeping FAM bit
+ cmpld r3,r1 ; See if nap and/or doze was on
+ std r6,saver6(r13) ; Save this one
+ mfsprg r2,0 ; Get the per_proc area
+ la r6,savesrr0(r13) ; point to line with SRR0, SRR1, CR, XER, and LR
+ beq++ eE64NoNap ; No nap here, skip all this...
+
+ sync ; Make sure we are clean
+ mtspr hid0,r3 ; Set the updated hid0
+ mfspr r1,hid0 ; Yes, this is silly, keep it here
+ mfspr r1,hid0 ; Yes, this is a duplicate, keep it here
+ mfspr r1,hid0 ; Yes, this is a duplicate, keep it here
+ mfspr r1,hid0 ; Yes, this is a duplicate, keep it here
+ mfspr r1,hid0 ; Yes, this is a duplicate, keep it here
+ mfspr r1,hid0 ; Yes, this is a duplicate, keep it here
+
+eE64NoNap: crnot wasNapping,cr0_eq ; Remember if we were napping
+ andi. r1,r11,T_FAM ; Check FAM bit
+ beq++ eEnoFAM ; Is it FAM intercept
+ mfsrr1 r3 ; Load srr1
+ andc r11,r11,r1 ; Clear FAM bit
+ rlwinm. r3,r3,0,MSR_PR_BIT,MSR_PR_BIT ; Are we trapping from supervisor state?
+ beq++ eEnoFAM ; From supervisor state
+ lwz r1,spcFlags(r2) ; Load spcFlags
+ rlwinm r1,r1,1+FamVMmodebit,30,31 ; Extract FamVMenabit and FamVMmodebit
+ cmpwi cr0,r1,2 ; Check FamVMena set without FamVMmode
+ bne++ eEnoFAM ; Can this context be FAM intercept
+ lwz r4,FAMintercept(r2) ; Load exceptions mask to intercept
+ li r3,0 ; Clear
+ srwi r1,r11,2 ; divide r11 by 4
+ oris r3,r3,0x8000 ; Set r3 to 0x80000000
+ srw r1,r3,r1 ; Set bit for current exception
+ and. r1,r1,r4 ; And current exception with the intercept mask
+ beq++ eEnoFAM ; Is it FAM intercept
+ b EXT(vmm_fam_exc)
+
+ .align 5
+
+eEnoFAM: lwz r1,pfAvailable(r2) ; Get the CPU features flags
+ dcbz128 0,r6 ; allocate 128-byte line with SRR0, SRR1, CR, XER, and LR
- bf featAltivec,noavec ; No Altivec on this CPU...
- li r9,0 ; Get set to clear VRSAVE
- mfspr r19,vrsave ; Get the VRSAVE register
- mtspr vrsave,r9 ; Clear VRSAVE for each interrupt level
+;
+; Remember, we are setting up CR6 with feature flags
+;
+ std r7,saver7(r13) ; Save this one
+ mtcrf 0x80,r1 ; Put the features flags (that we care about) in the CR
+ std r8,saver8(r13) ; Save this one
+ mtcrf 0x40,r1 ; Put the features flags (that we care about) in the CR
+ mfsrr0 r6 ; Get the interruption SRR0
+ lhz r8,PP_CPU_FLAGS(r2) ; Get the flags
+ mtcrf 0x20,r1 ; Put the features flags (that we care about) in the CR
+ mfsrr1 r7 ; Get the interrupt SRR1
+ rlwinm r8,r8,(((31-MSR_BE_BIT)+(traceBEb+16+1))&31),MSR_BE_BIT,MSR_BE_BIT ; Set BE bit if special trace is on
+ std r6,savesrr0(r13) ; Save the SRR0
+ mtcrf 0x02,r1 ; Put the features flags (that we care about) in the CR
+ rlwinm r6,r7,(((31-MSR_BE_BIT)+(MSR_PR_BIT+1))&31),MSR_BE_BIT,MSR_BE_BIT ; Move PR bit to BE bit
+ and r8,r6,r8 ; Remove BE bit only if problem state and special tracing on
+ std r9,saver9(r13) ; Save this one
+ andc r7,r7,r8 ; Clear BE bit if special trace is on and PR is set
+ crmove featAltivec,pfAltivecb ; Set the Altivec flag
+ std r7,savesrr1(r13) ; Save SRR1
+ mfsprg r9,3 ; Get rupt time R11
+ std r10,saver10(r13) ; Save this one
+ mfsprg r6,2 ; Get interrupt time R13
+ std r9,saver11(r13) ; Save rupt time R11
+ mtsprg 2,r1 ; Set the feature flags
+ std r12,saver12(r13) ; Save this one
+ mflr r4 ; Get the LR
+ mftb r7 ; Get the timebase
+ std r6,saver13(r13) ; Save rupt R13
+ std r7,ruptStamp(r2) ; Save the time stamp
+ std r7,SAVtime(r13) ; Save the time stamp
+
+ bf++ wasNapping,notNappingSF ; Skip if not waking up from nap...
+
+ ld r6,napStamp(r2) ; Pick up nap stamp
+ lis r3,hi16(EXT(machine_idle_ret)) ; Get high part of nap/doze return
+ sub r7,r7,r6 ; Subtract stamp from now
+ ld r6,napTotal(r2) ; Pick up total
+ add r6,r6,r7 ; Add low to total
+ ori r3,r3,lo16(EXT(machine_idle_ret)) ; Get low part of nap/doze return
+ std r6,napTotal(r2) ; Save the high total
+ std r3,savesrr0(r13) ; Modify to return to nap/doze exit
+
+notNappingSF:
+ std r14,saver14(r13) ; Save this one
+ std r15,saver15(r13) ; Save this one
+ stw r0,savecr(r13) ; Save rupt CR
+ mfctr r6 ; Get the CTR
+ std r16,saver16(r13) ; Save this one
+ std r4,savelr(r13) ; Save rupt LR
+
+ std r17,saver17(r13) ; Save this one
+ li r7,savepmc ; Point to pmc area
+ std r18,saver18(r13) ; Save this one
+ lwz r17,spcFlags(r2) ; Get the special flags from per_proc
+ std r6,savectr(r13) ; Save rupt CTR
+ std r19,saver19(r13) ; Save this one
+ mfdar r6 ; Get the rupt DAR
+ std r20,saver20(r13) ; Save this one
+
+ dcbz128 r7,r13 ; Clear out the pmc spot
+
+ std r21,saver21(r13) ; Save this one
+ std r5,savexer(r13) ; Save the rupt XER
+ std r22,saver22(r13) ; Save this one
+ std r23,saver23(r13) ; Save this one
+ std r24,saver24(r13) ; Save this one
+ std r25,saver25(r13) ; Save this one
+ mfdsisr r7 ; Get the rupt DSISR
+ std r26,saver26(r13) ; Save this one
+ andis. r17,r17,hi16(perfMonitor) ; Is the performance monitor enabled?
+ std r27,saver27(r13) ; Save this one
+ li r10,emfp0 ; Point to floating point save
+ std r28,saver28(r13) ; Save this one
+ la r27,savevscr(r13) ; point to 32-byte line with VSCR and FPSCR
+ std r29,saver29(r13) ; Save R29
+ std r30,saver30(r13) ; Save this one
+ std r31,saver31(r13) ; Save this one
+ std r6,savedar(r13) ; Save the rupt DAR
+ stw r7,savedsisr(r13) ; Save the rupt code DSISR
+ stw r11,saveexception(r13) ; Save the exception code
+
+ beq++ noPerfMonSave64 ; Performance monitor not on...
+
+ li r22,0 ; r22: zero
+
+ mfspr r23,mmcr0_gp
+ mfspr r24,mmcr1_gp
+ mfspr r25,mmcra_gp
+ std r23,savemmcr0(r13) ; Save MMCR0
+ std r24,savemmcr1(r13) ; Save MMCR1
+ std r25,savemmcr2(r13) ; Save MMCRA
+ mtspr mmcr0_gp,r22 ; Leave MMCR0 clear
+ mtspr mmcr1_gp,r22 ; Leave MMCR1 clear
+ mtspr mmcra_gp,r22 ; Leave MMCRA clear
+ mfspr r23,pmc1_gp
+ mfspr r24,pmc2_gp
+ mfspr r25,pmc3_gp
+ mfspr r26,pmc4_gp
+ stw r23,savepmc+0(r13) ; Save PMC1
+ stw r24,savepmc+4(r13) ; Save PMC2
+ stw r25,savepmc+8(r13) ; Save PMC3
+ stw r26,savepmc+12(r13) ; Save PMC4
+ mfspr r23,pmc5_gp
+ mfspr r24,pmc6_gp
+ mfspr r25,pmc7_gp
+ mfspr r26,pmc8_gp
+ stw r23,savepmc+16(r13) ; Save PMC5
+ stw r24,savepmc+20(r13) ; Save PMC6
+ stw r25,savepmc+24(r13) ; Save PMC7
+ stw r26,savepmc+28(r13) ; Save PMC8
+ mtspr pmc1_gp,r22 ; Leave PMC1 clear
+ mtspr pmc2_gp,r22 ; Leave PMC2 clear
+ mtspr pmc3_gp,r22 ; Leave PMC3 clear
+ mtspr pmc4_gp,r22 ; Leave PMC4 clear
+ mtspr pmc5_gp,r22 ; Leave PMC5 clear
+ mtspr pmc6_gp,r22 ; Leave PMC6 clear
+ mtspr pmc7_gp,r22 ; Leave PMC7 clear
+ mtspr pmc8_gp,r22 ; Leave PMC8 clear
+
+noPerfMonSave64:
+
+;
+; Everything is saved at this point, except for FPRs, and VMX registers.
+; Time for us to get a new savearea and then trace interrupt if it is enabled.
+;
+
+ lwz r25,traceMask(0) ; Get the trace mask
+ li r0,SAVgeneral ; Get the savearea type value
+ lhz r19,PP_CPU_NUMBER(r2) ; Get the logical processor number
+ stb r0,SAVflags+2(r13) ; Mark valid context
+ rlwinm r22,r11,30,0,31 ; Divide interrupt code by 2
+ li r23,trcWork ; Get the trace work area address
+ addi r22,r22,10 ; Adjust code so we shift into CR5
+ li r26,0x8 ; Get start of cpu mask
+ rlwnm r7,r25,r22,22,22 ; Set CR5_EQ bit position to 0 if tracing allowed
+ srw r26,r26,r19 ; Get bit position of cpu number
+ mtcrf 0x04,r7 ; Set CR5 to show trace or not
+ and. r26,r26,r25 ; See if we trace this cpu
+ crandc cr5_eq,cr5_eq,cr0_eq ; Turn off tracing if cpu is disabled
+
+ bne++ cr5,xcp64xit ; Skip all of this if no tracing here...
+
+;
+; We select a trace entry using a compare and swap on the next entry field.
+; Since we do not lock the actual trace buffer, there is a potential that
+; another processor could wrap an trash our entry. Who cares?
+;
+
+ lwz r25,traceStart(0) ; Get the start of trace table
+ lwz r26,traceEnd(0) ; Get end of trace table
+
+trcselSF: lwarx r20,0,r23 ; Get and reserve the next slot to allocate
+
+ addi r22,r20,LTR_size ; Point to the next trace entry
+ cmplw r22,r26 ; Do we need to wrap the trace table?
+ bne++ gotTrcEntSF ; No wrap, we got us a trace entry...
+
+ mr r22,r25 ; Wrap back to start
+
+gotTrcEntSF:
+ stwcx. r22,0,r23 ; Try to update the current pointer
+ bne- trcselSF ; Collision, try again...
+
+#if ESPDEBUG
+ dcbf 0,r23 ; Force to memory
+ sync
+#endif
+
+;
+; Let us cut that trace entry now.
+;
+; Note that this code cuts a trace table entry for everything but the CutTrace call.
+; An identical entry is made during normal CutTrace processing. Any entry
+; format changes made must be done in both places.
+;
+
+ dcbz128 0,r20 ; Zap the trace entry
+
+ lwz r9,SAVflags(r13) ; Get savearea flags
+
+ ld r16,ruptStamp(r2) ; Get top of time base
+ ld r0,saver0(r13) ; Get back interrupt time R0 (we need this whether we trace or not)
+ std r16,LTR_timeHi(r20) ; Set the upper part of TB
+ ld r1,saver1(r13) ; Get back interrupt time R1
+ rlwinm r9,r9,20,16,23 ; Isolate the special flags
+ ld r18,saver2(r13) ; Get back interrupt time R2
+ std r0,LTR_r0(r20) ; Save off register 0
+ rlwimi r9,r19,0,24,31 ; Slide in the cpu number
+ ld r3,saver3(r13) ; Restore this one
+ sth r9,LTR_cpu(r20) ; Stash the cpu number and special flags
+ std r1,LTR_r1(r20) ; Save off register 1
+ ld r4,saver4(r13) ; Restore this one
+ std r18,LTR_r2(r20) ; Save off register 2
+ ld r5,saver5(r13) ; Restore this one
+ ld r6,saver6(r13) ; Get R6
+ std r3,LTR_r3(r20) ; Save off register 3
+ lwz r16,savecr(r13) ; Get the CR value
+ std r4,LTR_r4(r20) ; Save off register 4
+ mfsrr0 r17 ; Get SRR0 back, it is still good
+ std r5,LTR_r5(r20) ; Save off register 5
+ std r6,LTR_r6(r20) ; Save off register 6
+ mfsrr1 r18 ; SRR1 is still good in here
+ stw r16,LTR_cr(r20) ; Save the CR
+ std r17,LTR_srr0(r20) ; Save the SSR0
+ std r18,LTR_srr1(r20) ; Save the SRR1
+
+ mfdar r17 ; Get this back
+ ld r16,savelr(r13) ; Get the LR
+ std r17,LTR_dar(r20) ; Save the DAR
+ mfctr r17 ; Get the CTR (still good in register)
+ std r16,LTR_lr(r20) ; Save the LR
+ std r17,LTR_ctr(r20) ; Save off the CTR
+ mfdsisr r17 ; Get the DSISR
+ std r13,LTR_save(r20) ; Save the savearea
+ stw r17,LTR_dsisr(r20) ; Save the DSISR
+ sth r11,LTR_excpt(r20) ; Save the exception type
+#if 0
+ lwz r17,FPUowner(r2) ; (TEST/DEBUG) Get the current floating point owner
+ stw r17,LTR_rsvd0(r20) ; (TEST/DEBUG) Record the owner
+#endif
+
+#if ESPDEBUG
+ dcbf 0,r20 ; Force to memory
+ sync ; Make sure it all goes
+#endif
+xcp64xit: mr r14,r11 ; Save the interrupt code across the call
+ bl EXT(save_get_phys_64) ; Grab a savearea
+ mfsprg r2,0 ; Get the per_proc info
+ li r10,emfp0 ; Point to floating point save
+ mr r11,r14 ; Get the exception code back
+ dcbz128 r10,r2 ; Clear for speed
+ std r3,next_savearea(r2) ; Store the savearea for the next rupt
+ b xcpCommon ; Go join the common interrupt processing...
+
+;
+; All of the context is saved. Now we will get a
+; fresh savearea. After this we can take an interrupt.
+;
+
+ .align 5
+
+xcpCommon:
+
+;
+; Here we will save some floating point and vector status
+; and we also set a clean default status for a new interrupt level.
+; Note that we assume that emfp0 is on an altivec boundary
+; and that R10 points to it (as a displacemnt from R2).
;
; We need to save the FPSCR as if it is normal context.
; This is because pending exceptions will cause an exception even if
; FP is disabled. We need to clear the FPSCR when we first start running in the
; kernel.
;
-noavec: stw r19,savevrsave(r13) ; Save the vector register usage flags
- bf- featFP,nofpexe ; No possible floating point exceptions...
-
- mfmsr r9 ; Get the MSR value
- ori r7,r9,lo16(MASK(MSR_FP)) ; Enable floating point
- mtmsr r7 ; Do it
- isync
stfd f0,emfp0(r2) ; Save FPR0
stfd f1,emfp1(r2) ; Save FPR1
+ li r19,0 ; Assume no Altivec
mffs f0 ; Get the FPSCR
- fsub f1,f1,f1 ; Make a 0
- stfd f0,savexfpscrpad(r13) ; Save the FPSCR
+ lfd f1,Zero(0) ; Make a 0
+ stfd f0,savefpscrpad(r13) ; Save the FPSCR
+ li r9,0 ; Get set to clear VRSAVE
mtfsf 0xFF,f1 ; Clear it
+ addi r14,r10,16 ; Displacement to second vector register
lfd f0,emfp0(r2) ; Restore FPR0
+ la r28,savevscr(r13) ; Point to the status area
lfd f1,emfp1(r2) ; Restore FPR1
- mtmsr r9 ; Turn off FP
- isync
-nofpexe:
-/*
- * Everything is saved at this point, except for FPRs, and VMX registers
- *
- * Time for a new save area. Allocate the trace table entry now also
- * Note that we haven't touched R0-R5 yet. Except for R0 & R1, that's in the save
- */
+ bf featAltivec,noavec ; No Altivec on this CPU...
+
+ stvxl v0,r10,r2 ; Save a register
+ stvxl v1,r14,r2 ; Save a second register
+ mfspr r19,vrsave ; Get the VRSAVE register
+ mfvscr v0 ; Get the vector status register
+ vspltish v1,1 ; Turn on the non-Java bit and saturate
+ stvxl v0,0,r28 ; Save the vector status
+ vspltisw v0,1 ; Turn on the saturate bit
+ vxor v1,v1,v0 ; Turn off saturate
+ mtvscr v1 ; Set the non-java, no saturate status for new level
+ mtspr vrsave,r9 ; Clear VRSAVE for each interrupt level
+ lvxl v0,r10,r2 ; Restore first work register
+ lvxl v1,r14,r2 ; Restore second work register
-lllck: lwarx r9,0,r8 /* Grab the lock value */
- li r7,1 /* Use part of the delay time */
- mr. r9,r9 /* Is it locked? */
- bne- lllcks /* Yeah, wait for it to clear... */
- stwcx. r7,0,r8 /* Try to seize that there durn lock */
- beq+ lllckd /* Got it... */
- b lllck /* Collision, try again... */
-
-lllcks: lwz r9,SVlock(r8) /* Get that lock in here */
- mr. r9,r9 /* Is it free yet? */
- beq+ lllck /* Yeah, try for it again... */
- b lllcks /* Sniff away... */
+noavec: stw r19,savevrsave(r13) ; Save the vector register usage flags
-lllckd: isync /* Purge any speculative executions here */
- lis r23,hi16(EXT(trcWork)) ; Get the work area address
- rlwinm r7,r11,30,0,31 /* Save 'rupt code shifted right 2 */
- ori r23,r23,lo16(EXT(trcWork)) ; Get the rest
-#if 1
- lwz r14,traceMask(r23) /* Get the trace mask */
-#else
- li r14,-1 /* (TEST/DEBUG) */
-#endif
- addi r7,r7,10 /* Adjust for CR5_EQ position */
- lwz r15,SVfree(r8) /* Get the head of the save area list */
- lwz r25,SVinuse(r8) /* Get the in use count */
- rlwnm r7,r14,r7,22,22 /* Set CR5_EQ bit position to 0 if tracing allowed */
- lwz r20,traceCurr(r23) /* Pick up the current trace entry */
- mtcrf 0x04,r7 /* Set CR5 to show trace or not */
-
- lwz r14,SACalloc(r15) /* Pick up the allocation bits */
- addi r25,r25,1 /* Bump up the in use count for the new savearea */
- lwz r21,traceEnd(r23) /* Grab up the end of it all */
- mr. r14,r14 /* Can we use the first one? */
- blt use1st /* Yeah... */
-
- andis. r14,r14,0x8000 /* Show we used the second and remember if it was the last */
- addi r10,r15,0x0800 /* Point to the first one */
- b gotsave /* We have the area now... */
-
-use1st: andis. r14,r14,0x4000 /* Mark first gone and remember if empty */
- mr r10,r15 /* Set the save area */
-
-gotsave: stw r14,SACalloc(r15) /* Put back the allocation bits */
- bne nodqsave /* There's still an empty slot, don't dequeue... */
-
- lwz r16,SACnext(r15) /* Get the next in line */
- stw r16,SVfree(r8) /* Dequeue our now empty save area block */
-
-nodqsave: addi r22,r20,LTR_size /* Point to the next trace entry */
- stw r25,SVinuse(r8) /* Set the in use count */
- li r17,0 /* Clear this for the lock */
- cmplw r22,r21 /* Do we need to wrap the trace table? */
- stw r17,SAVprev(r10) /* Clear back pointer for the newly allocated guy */
- mtsprg 1,r10 /* Get set for the next 'rupt */
- bne+ gotTrcEnt /* We got a trace entry... */
-
- lwz r22,traceStart(r23) /* Wrap back to the top */
-
-gotTrcEnt: bne- cr5,skipTrace1 /* Don't want to trace this kind... */
+;
+; We are now done saving all of the context. Start filtering the interrupts.
+; Note that a Redrive will count as an actual interrupt.
+; Note also that we take a lot of system calls so we will start decode here.
+;
+
+Redrive:
+
+
+#if INSTRUMENT
+ mfspr r20,pmc1 ; INSTRUMENT - saveinstr[4] - Take stamp before exception filter
+ stw r20,0x6100+(0x04*16)+0x0(0) ; INSTRUMENT - Save it
+ mfspr r20,pmc2 ; INSTRUMENT - Get stamp
+ stw r20,0x6100+(0x04*16)+0x4(0) ; INSTRUMENT - Save it
+ mfspr r20,pmc3 ; INSTRUMENT - Get stamp
+ stw r20,0x6100+(0x04*16)+0x8(0) ; INSTRUMENT - Save it
+ mfspr r20,pmc4 ; INSTRUMENT - Get stamp
+ stw r20,0x6100+(0x04*16)+0xC(0) ; INSTRUMENT - Save it
+#endif
+ lwz r22,SAVflags(r13) ; Pick up the flags
+ lwz r0,saver0+4(r13) ; Get back interrupt time syscall number
+ mfsprg r2,0 ; Restore per_proc
+
+ lwz r20,lo16(xcpTable)(r11) ; Get the interrupt handler (note: xcpTable must be in 1st 32k of physical memory)
+ la r12,hwCounts(r2) ; Point to the exception count area
+ andis. r24,r22,hi16(SAVeat) ; Should we eat this one?
+ rlwinm r22,r22,SAVredriveb+1,31,31 ; Get a 1 if we are redriving
+ add r12,r12,r11 ; Point to the count
+ lwz r25,0(r12) ; Get the old value
+ lwz r23,hwRedrives(r2) ; Get the redrive count
+ crmove cr3_eq,cr0_eq ; Remember if we are ignoring
+ xori r24,r22,1 ; Get the NOT of the redrive
+ mtctr r20 ; Point to the interrupt handler
+ mtcrf 0x80,r0 ; Set our CR0 to the high nybble of possible syscall code
+ add r25,r25,r24 ; Count this one if not a redrive
+ add r23,r23,r22 ; Count this one if if is a redrive
+ crandc cr0_lt,cr0_lt,cr0_gt ; See if we have R0 equal to 0b10xx...x
+ stw r25,0(r12) ; Store it back
+ stw r23,hwRedrives(r2) ; Save the redrive count
+ bne-- cr3,IgnoreRupt ; Interruption is being ignored...
+ bctr ; Go process the exception...
- stw r22,traceCurr(r23) /* Set the next entry for the next guy */
+
+;
+; Exception vector filter table (like everything in this file, must be in 1st 32KB of physical memory)
+;
+
+ .align 7
+
+xcpTable:
+ .long EatRupt ; T_IN_VAIN
+ .long PassUpTrap ; T_RESET
+ .long MachineCheck ; T_MACHINE_CHECK
+ .long EXT(handlePF) ; T_DATA_ACCESS
+ .long EXT(handlePF) ; T_INSTRUCTION_ACCESS
+ .long PassUpRupt ; T_INTERRUPT
+ .long EXT(AlignAssist) ; T_ALIGNMENT
+ .long EXT(Emulate) ; T_PROGRAM
+ .long PassUpFPU ; T_FP_UNAVAILABLE
+ .long PassUpRupt ; T_DECREMENTER
+ .long PassUpTrap ; T_IO_ERROR
+ .long PassUpTrap ; T_RESERVED
+ .long xcpSyscall ; T_SYSTEM_CALL
+ .long PassUpTrap ; T_TRACE
+ .long PassUpTrap ; T_FP_ASSIST
+ .long PassUpTrap ; T_PERF_MON
+ .long PassUpVMX ; T_VMX
+ .long PassUpTrap ; T_INVALID_EXCP0
+ .long PassUpTrap ; T_INVALID_EXCP1
+ .long PassUpTrap ; T_INVALID_EXCP2
+ .long PassUpTrap ; T_INSTRUCTION_BKPT
+ .long PassUpRupt ; T_SYSTEM_MANAGEMENT
+ .long EXT(AltivecAssist) ; T_ALTIVEC_ASSIST
+ .long PassUpRupt ; T_THERMAL
+ .long PassUpTrap ; T_INVALID_EXCP5
+ .long PassUpTrap ; T_INVALID_EXCP6
+ .long PassUpTrap ; T_INVALID_EXCP7
+ .long PassUpTrap ; T_INVALID_EXCP8
+ .long PassUpTrap ; T_INVALID_EXCP9
+ .long PassUpTrap ; T_INVALID_EXCP10
+ .long PassUpTrap ; T_INVALID_EXCP11
+ .long PassUpTrap ; T_INVALID_EXCP12
+ .long PassUpTrap ; T_INVALID_EXCP13
+
+ .long PassUpTrap ; T_RUNMODE_TRACE
+
+ .long PassUpRupt ; T_SIGP
+ .long PassUpTrap ; T_PREEMPT
+ .long conswtch ; T_CSWITCH
+ .long PassUpRupt ; T_SHUTDOWN
+ .long PassUpAbend ; T_CHOKE
+
+ .long EXT(handleDSeg) ; T_DATA_SEGMENT
+ .long EXT(handleISeg) ; T_INSTRUCTION_SEGMENT
+
+ .long WhoaBaby ; T_SOFT_PATCH
+ .long WhoaBaby ; T_MAINTENANCE
+ .long WhoaBaby ; T_INSTRUMENTATION
+ .long WhoaBaby ; T_ARCHDEP0
+ .long EatRupt ; T_HDEC
+;
+; Just what the heck happened here????
+; NB: also get here from UFT dispatch table, on bogus index
+;
-#if ESPDEBUG
- dcbst br0,r23 ; (TEST/DEBUG)
- sync ; (TEST/DEBUG)
-#endif
+WhoaBaby: b . ; Open the hood and wait for help
+
+ .align 5
- bf- featL1ena,skipz6 ; L1 cache is disabled...
- dcbz 0,r20 /* Allocate cache for the entry */
-skipz6:
+IgnoreRupt:
+ lwz r20,hwIgnored(r2) ; Grab the ignored interruption count
+ addi r20,r20,1 ; Count this one
+ stw r20,hwIgnored(r2) ; Save the ignored count
+ b EatRupt ; Ignore it...
+
+
+
+;
+; System call
+;
+
+ .align 5
+
+xcpSyscall: lis r20,hi16(EXT(shandler)) ; Assume this is a normal one, get handler address
+ rlwinm r6,r0,1,0,31 ; Move sign bit to the end
+ ori r20,r20,lo16(EXT(shandler)) ; Assume this is a normal one, get handler address
+ bnl++ cr0,PassUp ; R0 not 0b10xxx...x, can not be any kind of magical system call, just pass it up...
+ lwz r7,savesrr1+4(r13) ; Get the entering MSR (low half)
+ lwz r1,dgFlags(0) ; Get the flags
+ cmplwi cr2,r6,1 ; See if original R0 had the CutTrace request code in it
-skipTrace1: sync /* Make sure all stores are done */
- stw r17,SVlock(r8) /* Unlock both save and trace areas */
+ rlwinm. r7,r7,0,MSR_PR_BIT,MSR_PR_BIT ; Did we come from user state?
+ beq++ FCisok ; From supervisor state...
+ rlwinm. r1,r1,0,enaUsrFCallb,enaUsrFCallb ; Are they valid?
+ beq++ PassUp ; No, treat as a normal one...
-/*
- * At this point, we can take another exception and lose nothing.
- *
- * We still have the current savearea pointed to by R13, the next by R10 and
- * sprg1. R20 contains the pointer to a trace entry and CR5_eq says
- * to do the trace or not.
- *
- * Note that R13 was chosen as the save area pointer because the SIGP,
- * firmware, and DSI/ISI handlers aren't supposed to touch anything
- * over R12. But, actually, the DSI/ISI stuff does.
- *
- *
- * Let's cut that trace entry now.
- */
+FCisok: beq++ cr2,EatRupt ; This is a CutTrace system call, we are done with it...
+
+;
+; Here is where we call the firmware. If it returns T_IN_VAIN, that means
+; that it has handled the interruption. Remember: thou shalt not trash R13
+; while you are away. Anything else is ok.
+;
- lwz r0,saver0(r13) ; Get back interrupt time R0
- bne- cr5,skipTrace2 /* Don't want to trace this kind... */
+ lwz r3,saver3+4(r13) ; Restore the first parameter
+ b EXT(FirmwareCall) ; Go handle the firmware call....
- mfsprg r2,0 ; Get the per_proc
- li r14,32 /* Second line of entry */
+;
+; Here is where we return from the firmware call
+;
- lwz r16,ruptStamp(r2) ; Get top of time base
- lwz r17,ruptStamp+4(r2) ; Get the bottom of time stamp
+ .align 5
+ .globl EXT(FCReturn)
+
+LEXT(FCReturn)
+ cmplwi r3,T_IN_VAIN ; Was it handled?
+ beq++ EatRupt ; Interrupt was handled...
+ mr r11,r3 ; Put the rupt code into the right register
+ b Redrive ; Go through the filter again...
- bf- featL1ena,skipz7 ; L1 cache is disabled...
- dcbz r14,r20 /* Zap the second half */
-
-skipz7: stw r16,LTR_timeHi(r20) /* Set the upper part of TB */
- bf featSMP,nopir4 ; Is there a processor ID register on this guy?
- mfspr r19,pir /* Get the processor address */
- b gotpir4 /* Got it... */
-nopir4: li r19,0 /* Assume processor 0 for those underprivileged folks */
-gotpir4:
- lwz r1,saver1(r13) ; Get back interrupt time R1
- stw r17,LTR_timeLo(r20) /* Set the lower part of TB */
- rlwinm r19,r19,0,27,31 /* Cut the junk */
- lwz r2,saver2(r13) ; Get back interrupt time R2
- stw r0,LTR_r0(r20) /* Save off register 0 */
- lwz r3,saver3(r13) ; Restore this one
- sth r19,LTR_cpu(r20) /* Stash the cpu address */
- stw r1,LTR_r1(r20) /* Save off register 1 */
- lwz r4,saver4(r13) ; Restore this one
- stw r2,LTR_r2(r20) /* Save off register 2 */
- lwz r5,saver5(r13) ; Restore this one
- stw r3,LTR_r3(r20) /* Save off register 3 */
- lwz r16,savecr(r13) /* We don't remember the CR anymore, get it */
- stw r4,LTR_r4(r20) /* Save off register 4 */
- mfsrr0 r17 /* Get this back, it's still good */
- stw r5,LTR_r5(r20) /* Save off register 5 */
- mfsrr1 r18 /* This is still good in here also */
-
- stw r16,LTR_cr(r20) /* Save the CR (or dec) */
- stw r17,LTR_srr0(r20) /* Save the SSR0 */
- stw r18,LTR_srr1(r20) /* Save the SRR1 */
- mfdar r17 /* Get this back */
-
- mflr r16 /* Get the LR */
- stw r17,LTR_dar(r20) /* Save the DAR */
- mfctr r17 /* Get the CTR */
- stw r16,LTR_lr(r20) /* Save the LR */
+
+;
+; Here is where we return from the PTE miss and segment exception handler
+;
+
+ .align 5
+ .globl EXT(PFSExit)
+
+LEXT(PFSExit)
+
+#if 0
+ mfsprg r2,0 ; (BRINGUP)
+ lwz r0,savedsisr(r13) ; (BRINGUP)
+ andis. r0,r0,hi16(dsiAC) ; (BRINGUP)
+ beq++ didnthit ; (BRINGUP)
+ lwz r0,20(0) ; (BRINGUP)
+ mr. r0,r0 ; (BRINGUP)
+ bne-- didnthit ; (BRINGUP)
#if 0
- lis r17,HIGH_ADDR(EXT(saveanchor)) ; (TEST/DEBUG)
- ori r17,r17,LOW_ADDR(EXT(saveanchor)) ; (TEST/DEBUG)
- lwz r16,SVcount(r17) ; (TEST/DEBUG)
- lwz r17,SVinuse(r17) ; (TEST/DEBUG)
- rlwimi r17,r16,16,0,15 ; (TEST/DEBUG)
+ li r0,1 ; (BRINGUP)
+ stw r0,20(0) ; (BRINGUP)
+ lis r0,hi16(Choke) ; (BRINGUP)
+ ori r0,r0,lo16(Choke) ; (BRINGUP)
+ sc ; (BRINGUP)
#endif
- stw r17,LTR_ctr(r20) /* Save off the CTR */
- stw r13,LTR_save(r20) /* Save the savearea */
- sth r11,LTR_excpt(r20) /* Save the exception type */
-#if ESPDEBUG
- addi r17,r20,32 ; (TEST/DEBUG)
- dcbst br0,r20 ; (TEST/DEBUG)
- dcbst br0,r17 ; (TEST/DEBUG)
- sync ; (TEST/DEBUG)
+
+ lwz r4,savesrr0+4(r13) ; (BRINGUP)
+ lwz r8,savesrr1+4(r13) ; (BRINGUP)
+ lwz r6,savedar+4(r13) ; (BRINGUP)
+ rlwinm. r0,r8,0,MSR_IR_BIT,MSR_IR_BIT ; (BRINGUP)
+ mfmsr r9 ; (BRINGUP)
+ ori r0,r9,lo16(MASK(MSR_DR)) ; (BRINGUP)
+ beq-- hghg ; (BRINGUP)
+ mtmsr r0 ; (BRINGUP)
+ isync ; (BRINGUP)
+
+hghg: lwz r5,0(r4) ; (BRINGUP)
+ beq-- hghg1 ; (BRINGUP)
+ mtmsr r9 ; (BRINGUP)
+ isync ; (BRINGUP)
+
+hghg1: rlwinm r7,r5,6,26,31 ; (BRINGUP)
+ rlwinm r27,r5,14,24,28 ; (BRINGUP)
+ addi r3,r13,saver0+4 ; (BRINGUP)
+ lwzx r3,r3,r27 ; (BRINGUP)
+
+#if 0
+ lwz r27,patcharea+4(r2) ; (BRINGUP)
+ mr. r3,r3 ; (BRINGUP)
+ bne++ nbnbnb ; (BRINGUP)
+ addi r27,r27,1 ; (BRINGUP)
+ stw r27,patcharea+4(r2) ; (BRINGUP)
+nbnbnb:
+#endif
+
+ rlwinm. r28,r8,0,MSR_DR_BIT,MSR_DR_BIT ; (BRINGUP)
+ rlwinm r27,r6,0,0,29 ; (BRINGUP)
+ ori r28,r9,lo16(MASK(MSR_DR)) ; (BRINGUP)
+ mfspr r10,dabr ; (BRINGUP)
+ li r0,0 ; (BRINGUP)
+ mtspr dabr,r0 ; (BRINGUP)
+ cmplwi cr1,r7,31 ; (BRINGUP)
+ beq-- qqq0 ; (BRINGUP)
+ mtmsr r28 ; (BRINGUP)
+qqq0:
+ isync ; (BRINGUP)
+
+ lwz r27,0(r27) ; (BRINGUP) - Get original value
+
+ bne cr1,qqq1 ; (BRINGUP)
+
+ rlwinm r5,r5,31,22,31 ; (BRINGUP)
+ cmplwi cr1,r5,151 ; (BRINGUP)
+ beq cr1,qqq3 ; (BRINGUP)
+ cmplwi cr1,r5,407 ; (BRINGUP)
+ beq cr1,qqq2 ; (BRINGUP)
+ cmplwi cr1,r5,215 ; (BRINGUP)
+ beq cr1,qqq0q ; (BRINGUP)
+ cmplwi cr1,r5,1014 ; (BRINGUP)
+ beq cr1,qqqm1 ; (BRINGUP)
+
+ lis r0,hi16(Choke) ; (BRINGUP)
+ ori r0,r0,lo16(Choke) ; (BRINGUP)
+ sc ; (BRINGUP)
+
+qqqm1: rlwinm r7,r6,0,0,26 ; (BRINGUP)
+ stw r0,0(r7) ; (BRINGUP)
+ stw r0,4(r7) ; (BRINGUP)
+ stw r0,8(r7) ; (BRINGUP)
+ stw r0,12(r7) ; (BRINGUP)
+ stw r0,16(r7) ; (BRINGUP)
+ stw r0,20(r7) ; (BRINGUP)
+ stw r0,24(r7) ; (BRINGUP)
+ stw r0,28(r7) ; (BRINGUP)
+ b qqq9
+
+qqq1: cmplwi r7,38 ; (BRINGUP)
+ bgt qqq2 ; (BRINGUP)
+ blt qqq3 ; (BRINGUP)
+
+qqq0q: stb r3,0(r6) ; (BRINGUP)
+ b qqq9 ; (BRINGUP)
+
+qqq2: sth r3,0(r6) ; (BRINGUP)
+ b qqq9 ; (BRINGUP)
+
+qqq3: stw r3,0(r6) ; (BRINGUP)
+
+qqq9:
+#if 0
+ rlwinm r7,r6,0,0,29 ; (BRINGUP)
+ lwz r0,0(r7) ; (BRINGUP) - Get newest value
+#else
+ lis r7,hi16(0x000792B8) ; (BRINGUP)
+ ori r7,r7,lo16(0x000792B8) ; (BRINGUP)
+ lwz r0,0(r7) ; (BRINGUP) - Get newest value
#endif
+ mtmsr r9 ; (BRINGUP)
+ mtspr dabr,r10 ; (BRINGUP)
+ isync ; (BRINGUP)
-/*
- * We're done with the trace, except for maybe modifying the exception
- * code later on. So, that means that we need to save R20 and CR5, but
- * R0 to R5 are clear now.
- *
- * So, let's finish setting up the kernel registers now.
- */
+#if 0
+ lwz r28,patcharea+12(r2) ; (BRINGUP)
+ mr. r28,r28 ; (BRINGUP)
+ bne++ qqq12 ; (BRINGUP)
+ lis r28,0x4000 ; (BRINGUP)
+
+qqq12: stw r27,0(r28) ; (BRINGUP)
+ lwz r6,savedar+4(r13) ; (BRINGUP)
+ stw r0,4(r28) ; (BRINGUP)
+ stw r4,8(r28) ; (BRINGUP)
+ stw r6,12(r28) ; (BRINGUP)
+ addi r28,r28,16 ; (BRINGUP)
+ mr. r3,r3 ; (BRINGUP)
+ stw r28,patcharea+12(r2) ; (BRINGUP)
+ lwz r10,patcharea+8(r2) ; (BRINGUP)
+ lwz r0,patcharea+4(r2) ; (BRINGUP)
+#endif
-skipTrace2:
+#if 1
+ stw r0,patcharea(r2) ; (BRINGUP)
+#endif
-#if PERFTIMES && DEBUG
- li r3,68 ; Indicate interrupt
- mr r4,r11 ; Get code to log
- mr r5,r13 ; Get savearea to log
- mr r8,r0 ; Save R0
- bl EXT(dbgLog2) ; Cut log entry
- mr r0,r8 ; Restore R0
+#if 0
+ xor r28,r0,r27 ; (BRINGUP) - See how much it changed
+ rlwinm r28,r28,24,24,31 ; (BRINGUP)
+ cmplwi r28,1 ; (BRINGUP)
+
+ ble++ qqq10 ; (BRINGUP)
+
+ mr r7,r0 ; (BRINGUP)
+ li r0,1 ; (BRINGUP)
+ stw r0,20(0) ; (BRINGUP)
+ lis r0,hi16(Choke) ; (BRINGUP)
+ ori r0,r0,lo16(Choke) ; (BRINGUP)
+ sc ; (BRINGUP)
#endif
- mfsprg r2,0 /* Get the per processor block */
-#if CHECKSAVE
+qqq10: addi r4,r4,4 ; (BRINGUP)
+ stw r4,savesrr0+4(r13) ; (BRINGUP)
+
+ li r11,T_IN_VAIN ; (BRINGUP)
+ b EatRupt ; (BRINGUP)
+
+didnthit: ; (BRINGUP)
+#endif
+#if 0
+ lwz r0,20(0) ; (BRINGUP)
+ mr. r0,r0 ; (BRINGUP)
+ beq++ opopop ; (BRINGUP)
+ li r0,0 ; (BRINGUP)
+ stw r0,20(0) ; (BRINGUP)
+ lis r0,hi16(Choke) ; (BRINGUP)
+ ori r0,r0,lo16(Choke) ; (BRINGUP)
+ sc ; (BRINGUP)
+opopop:
+#endif
+ lwz r0,savesrr1+4(r13) ; Get the MSR in use at exception time
+ cmplwi cr1,r11,T_IN_VAIN ; Was it handled?
+ rlwinm. r4,r0,0,MSR_PR_BIT,MSR_PR_BIT ; Are we trapping from supervisor state?
+ beq++ cr1,EatRupt ; Yeah, just blast back to the user...
+ beq-- NoFamPf
+ mfsprg r2,0 ; Get back per_proc
+ lwz r1,spcFlags(r2) ; Load spcFlags
+ rlwinm r1,r1,1+FamVMmodebit,30,31 ; Extract FamVMenabit and FamVMmodebit
+ cmpi cr0,r1,2 ; Check FamVMena set without FamVMmode
+ bne-- cr0,NoFamPf
+ lwz r6,FAMintercept(r2) ; Load exceptions mask to intercept
+ li r5,0 ; Clear
+ srwi r1,r11,2 ; divide r11 by 4
+ oris r5,r5,0x8000 ; Set r5 to 0x80000000
+ srw r1,r5,r1 ; Set bit for current exception
+ and. r1,r1,r6 ; And current exception with the intercept mask
+ beq++ NoFamPf ; Is it FAM intercept
+ bl EXT(vmm_fam_pf)
+ b EatRupt
+
+NoFamPf: andi. r4,r0,lo16(MASK(MSR_RI)) ; See if the recover bit is on
+ lis r0,0x8000 ; Get 0xFFFFFFFF80000000
+ add r0,r0,r0 ; Get 0xFFFFFFFF00000000
+ beq++ PassUpTrap ; Not on, normal case...
+;
+; Here is where we handle the "recovery mode" stuff.
+; This is set by an emulation routine to trap any faults when it is fetching data or
+; instructions.
+;
+; If we get a fault, we turn off RI, set CR0_EQ to false, bump the PC, and set R0
+; and R1 to the DAR and DSISR, respectively.
+;
+ lwz r3,savesrr0(r13) ; Get the failing instruction address
+ lwz r4,savesrr0+4(r13) ; Get the failing instruction address
+ lwz r5,savecr(r13) ; Get the condition register
+ or r4,r4,r0 ; Fill the high part with foxes
+ lwz r0,savedar(r13) ; Get the DAR
+ addic r4,r4,4 ; Skip failing instruction
+ lwz r6,savedar+4(r13) ; Get the DAR
+ addze r3,r3 ; Propagate carry
+ rlwinm r5,r5,0,3,1 ; Clear CR0_EQ to let emulation code know we failed
+ lwz r7,savedsisr(r13) ; Grab the DSISR
+ stw r3,savesrr0(r13) ; Save resume address
+ stw r4,savesrr0+4(r13) ; Save resume address
+ stw r5,savecr(r13) ; And the resume CR
+ stw r0,saver0(r13) ; Pass back the DAR
+ stw r6,saver0+4(r13) ; Pass back the DAR
+ stw r7,saver1+4(r13) ; Pass back the DSISR
+ b EatRupt ; Resume emulated code
- lis r4,0x7FFF /* (TEST/DEBUG) */
- mfdec r12 /* (TEST/DEBUG) */
- or r4,r4,r12 /* (TEST/DEBUG) */
- mtdec r4 /* (TEST/DEBUG) */
- li r4,0x20 /* (TEST/DEBUG) */
-
- lwarx r8,0,r4 ; ?
-
-mpwait2: lwarx r8,0,r4 /* (TEST/DEBUG) */
- mr. r8,r8 /* (TEST/DEBUG) */
- bne- mpwait2 /* (TEST/DEBUG) */
- stwcx. r4,0,r4 /* (TEST/DEBUG) */
- bne- mpwait2 /* (TEST/DEBUG) */
-
- isync /* (TEST/DEBUG) */
- lwz r4,0xD80(br0) /* (TEST/DEBUG) */
- mr. r4,r4 /* (TEST/DEBUG) */
- li r4,1 /* (TEST/DEBUG) */
- bne- doncheksv /* (TEST/DEBUG) */
-
- lis r8,HIGH_ADDR(EXT(saveanchor)) /* (TEST/DEBUG) */
- ori r8,r8,LOW_ADDR(EXT(saveanchor)) /* (TEST/DEBUG) */
-
- stw r4,0xD80(br0) /* (TEST/DEBUG) */
+;
+; Here is where we handle the context switch firmware call. The old
+; context has been saved. The new savearea is in kind of hokey, the high order
+; half is stored in saver7 and the low half is in saver3. We will just
+; muck around with the savearea pointers, and then join the exit routine
+;
- lwarx r4,0,r8 ; ?
+ .align 5
-mpwait2x: lwarx r4,0,r8 /* (TEST/DEBUG) */
- mr. r4,r4 /* (TEST/DEBUG) */
- bne- mpwait2x /* (TEST/DEBUG) */
- stwcx. r8,0,r8 /* (TEST/DEBUG) */
- bne- mpwait2x /* (TEST/DEBUG) */
+conswtch:
+ li r0,0xFFF ; Get page boundary
+ mr r29,r13 ; Save the save
+ andc r30,r13,r0 ; Round down to page boundary (64-bit safe)
+ lwz r5,saver3+4(r13) ; Switch to the new savearea
+ bf-- pf64Bitb,xcswNo64 ; Not 64-bit...
+ lwz r6,saver7+4(r13) ; Get the high order half
+ sldi r6,r6,32 ; Position high half
+ or r5,r5,r6 ; Merge them
+
+xcswNo64: lwz r30,SACvrswap+4(r30) ; get real to virtual translation
+ mr r13,r5 ; Switch saveareas
+ li r0,0 ; Clear this
+ xor r27,r29,r30 ; Flip to virtual
+ stw r0,saver3(r5) ; Push the new virtual savearea to the switch to routine
+ stw r27,saver3+4(r5) ; Push the new virtual savearea to the switch to routine
+ b EatRupt ; Start it up...
- isync /* (TEST/DEBUG) */
+;
+; Handle machine check here.
+;
+; ?
+;
-#if 0
- rlwinm r4,r13,0,0,19 /* (TEST/DEBUG) */
- lwz r21,SACflags(r4) /* (TEST/DEBUG) */
- rlwinm r22,r21,24,24,31 /* (TEST/DEBUG) */
- cmplwi r22,0x00EE /* (TEST/DEBUG) */
- lwz r22,SACvrswap(r4) /* (TEST/DEBUG) */
- bne- currbad /* (TEST/DEBUG) */
- andis. r21,r21,hi16(sac_perm) /* (TEST/DEBUG) */
- bne- currnotbad /* (TEST/DEBUG) */
- mr. r22,r22 /* (TEST/DEBUG) */
- bne+ currnotbad /* (TEST/DEBUG) */
-
-currbad: lis r23,hi16(EXT(debugbackpocket)) /* (TEST/DEBUG) */
- ori r23,r23,lo16(EXT(debugbackpocket)) /* (TEST/DEBUG) */
- stw r23,SVfree(r8) /* (TEST/DEBUG) */
-
- mfsprg r25,1 /* (TEST/DEBUG) */
- mtsprg 1,r23 /* (TEST/DEBUG) */
- lwz r26,SACalloc(r23) /* (TEST/DEBUG) */
- rlwinm r26,r26,0,1,31 /* (TEST/DEBUG) */
- stw r26,SACalloc(r23) /* (TEST/DEBUG) */
-
- sync /* (TEST/DEBUG) */
- li r28,0 /* (TEST/DEBUG) */
- stw r28,0x20(br0) /* (TEST/DEBUG) */
- stw r28,0(r8) /* (TEST/DEBUG) */
- BREAKPOINT_TRAP /* (TEST/DEBUG) */
-
-currnotbad:
-#endif
+ .align 5
+
+MachineCheck:
+
+ bt++ pf64Bitb,mck64 ; ?
+
+ lwz r27,savesrr1+4(r13) ; Pick up srr1
+
+;
+; Check if the failure was in
+; ml_probe_read. If so, this is expected, so modify the PC to
+; ml_proble_read_mck and then eat the exception.
+;
+ lwz r30,savesrr0+4(r13) ; Get the failing PC
+ lis r28,hi16(EXT(ml_probe_read_mck)) ; High order part
+ lis r27,hi16(EXT(ml_probe_read)) ; High order part
+ ori r28,r28,lo16(EXT(ml_probe_read_mck)) ; Get the low part
+ ori r27,r27,lo16(EXT(ml_probe_read)) ; Get the low part
+ cmplw r30,r28 ; Check highest possible
+ cmplw cr1,r30,r27 ; Check lowest
+ bge- PassUpTrap ; Outside of range
+ blt- cr1,PassUpTrap ; Outside of range
+;
+; We need to fix up the BATs here because the probe
+; routine messed them all up... As long as we are at it,
+; fix up to return directly to caller of probe.
+;
- lwz r28,SVcount(r8) /* (TEST/DEBUG) */
- lwz r21,SVinuse(r8) /* (TEST/DEBUG) */
- lwz r23,SVmin(r8) /* (TEST/DEBUG) */
- sub r22,r28,r21 /* (TEST/DEBUG) */
- cmpw r22,r23 /* (TEST/DEBUG) */
- bge+ cksave0 /* (TEST/DEBUG) */
-
- li r4,0 /* (TEST/DEBUG) */
- stw r4,0x20(br0) /* (TEST/DEBUG) */
- stw r4,0(r8) /* (TEST/DEBUG) */
- BREAKPOINT_TRAP /* (TEST/DEBUG) */
-
-cksave0: lwz r28,SVfree(r8) /* (TEST/DEBUG) */
- li r24,0 /* (TEST/DEBUG) */
- li r29,1 /* (TEST/SAVE) */
-
-cksave0a: mr. r28,r28 /* (TEST/DEBUG) */
- beq- cksave3 /* (TEST/DEBUG) */
-
- rlwinm. r21,r28,0,4,19 /* (TEST/DEBUG) */
- bne+ cksave1 /* (TEST/DEBUG) */
-
- li r4,0 /* (TEST/DEBUG) */
- stw r4,0x20(br0) /* (TEST/DEBUG) */
- stw r4,0(r8) /* (TEST/DEBUG) */
- BREAKPOINT_TRAP /* (TEST/DEBUG) */
-
-cksave1: rlwinm. r21,r28,0,21,3 /* (TEST/DEBUG) */
- beq+ cksave2 /* (TEST/DEBUG) */
-
- li r4,0 /* (TEST/DEBUG) */
- stw r4,0x20(br0) /* (TEST/DEBUG) */
- stw r4,0(r8) /* (TEST/DEBUG) */
- BREAKPOINT_TRAP /* (TEST/DEBUG) */
-
-cksave2: lwz r25,SACalloc(r28) /* (TEST/DEBUG) */
- lbz r26,SACflags+2(r28) /* (TEST/DEBUG) */
- lbz r21,SACflags+3(r28) /* (TEST/DEBUG) */
- cmplwi r26,0x00EE /* (TEST/DEBUG) */
- stb r29,SACflags+3(r28) /* (TEST/DEBUG) */
- beq+ cksave2z
-
- li r4,0 /* (TEST/DEBUG) */
- stw r4,0x20(br0) /* (TEST/DEBUG) */
- stw r4,0(r8) /* (TEST/DEBUG) */
- BREAKPOINT_TRAP /* (TEST/DEBUG) */
-
-cksave2z: mr. r21,r21 /* (TEST/DEBUG) */
- beq+ cksave2a /* (TEST/DEBUG) */
-
- li r4,0 /* (TEST/DEBUG) */
- stw r4,0x20(br0) /* (TEST/DEBUG) */
- stw r4,0(r8) /* (TEST/DEBUG) */
- BREAKPOINT_TRAP /* (TEST/DEBUG) */
-
-cksave2a: rlwinm r26,r25,1,31,31 /* (TEST/DEBUG) */
- rlwinm r27,r25,2,31,31 /* (TEST/DEBUG) */
- add r24,r24,r26 /* (TEST/DEBUG) */
- add r24,r24,r27 /* (TEST/DEBUG) */
- lwz r28,SACnext(r28) /* (TEST/DEBUG) */
- b cksave0a /* (TEST/DEBUG) */
-
-cksave3: cmplw r24,r22 /* (TEST/DEBUG) */
- beq+ cksave4 /* (TEST/DEBUG) */
-
- li r4,0 /* (TEST/DEBUG) */
- stw r4,0x20(br0) /* (TEST/DEBUG) */
- stw r4,0(r8) /* (TEST/DEBUG) */
- BREAKPOINT_TRAP /* (TEST/DEBUG) */
-
-cksave4: lwz r28,SVfree(r8) /* (TEST/DEBUG) */
- li r24,0 /* (TEST/DEBUG) */
-
-cksave5: mr. r28,r28 /* (TEST/DEBUG) */
- beq- cksave6 /* (TEST/DEBUG) */
- stb r24,SACflags+3(r28) /* (TEST/DEBUG) */
- lwz r28,SACnext(r28) /* (TEST/DEBUG) */
- b cksave5 /* (TEST/DEBUG) */
-
-cksave6:
-
- li r4,0 /* (TEST/DEBUG) */
- stw r4,0xD80(br0) /* (TEST/DEBUG) */
- stw r4,0(r8) /* (TEST/DEBUG) */
-
-doncheksv:
- li r4,0 /* (TEST/DEBUG) */
- stw r4,0x20(br0) /* (TEST/DEBUG) */
- mtdec r12 /* (TEST/DEBUG) */
-#endif
+ lis r11,hi16(EXT(shadow_BAT)+shdDBAT) ; Get shadow address
+ ori r11,r11,lo16(EXT(shadow_BAT)+shdDBAT) ; Get shadow address
+
+ lwz r30,0(r11) ; Pick up DBAT 0 high
+ lwz r28,4(r11) ; Pick up DBAT 0 low
+ lwz r27,8(r11) ; Pick up DBAT 1 high
+ lwz r18,16(r11) ; Pick up DBAT 2 high
+ lwz r11,24(r11) ; Pick up DBAT 3 high
+
+ sync
+ mtdbatu 0,r30 ; Restore DBAT 0 high
+ mtdbatl 0,r28 ; Restore DBAT 0 low
+ mtdbatu 1,r27 ; Restore DBAT 1 high
+ mtdbatu 2,r18 ; Restore DBAT 2 high
+ mtdbatu 3,r11 ; Restore DBAT 3 high
+ sync
- lis r4,HIGH_ADDR(EXT(MPspec)) /* Get the MP control block */
- dcbt 0,r2 /* We'll need the per_proc in a sec */
- cmplwi cr0,r11,T_INTERRUPT /* Do we have an external interrupt? */
- ori r4,r4,LOW_ADDR(EXT(MPspec)) /* Get the bottom half of the MP control block */
- bne+ notracex /* Not an external... */
+ lwz r28,savelr+4(r13) ; Get return point
+ lwz r27,saver0+4(r13) ; Get the saved MSR
+ li r30,0 ; Get a failure RC
+ stw r28,savesrr0+4(r13) ; Set the return point
+ stw r27,savesrr1+4(r13) ; Set the continued MSR
+ stw r30,saver3+4(r13) ; Set return code
+ b EatRupt ; Yum, yum, eat it all up...
-/*
- * Here we check to see if there was a interprocessor signal
- */
+;
+; 64-bit machine checks
+;
+
+mck64:
+
+;
+; NOTE: WE NEED TO RETHINK RECOVERABILITY A BIT - radar 3167190
+;
+
+ ld r23,savesrr0(r13) ; Grab the SRR0 in case we need bad instruction
+ ld r20,savesrr1(r13) ; Grab the SRR1 so we can decode the thing
+ lwz r21,savedsisr(r13) ; We might need this in a bit
+ ld r22,savedar(r13) ; We might need this in a bit
+
+ lis r8,AsyMCKSrc ; Get the Async MCK Source register address
+ mfsprg r19,2 ; Get the feature flags
+ ori r8,r8,0x8000 ; Set to read data
+ rlwinm. r0,r19,0,pfSCOMFixUpb,pfSCOMFixUpb ; Do we need to fix the SCOM data?
+
+ sync
+
+ mtspr scomc,r8 ; Request the MCK source
+ mfspr r24,scomd ; Get the source
+ mfspr r8,scomc ; Get back the status (we just ignore it)
+ sync
+ isync
+
+ lis r8,AsyMCKRSrc ; Get the Async MCK Source AND mask address
+ li r9,0 ; Get and AND mask of 0
+
+ sync
+
+ mtspr scomd,r9 ; Set the AND mask to 0
+ mtspr scomc,r8 ; Write the AND mask and clear conditions
+ mfspr r8,scomc ; Get back the status (we just ignore it)
+ sync
+ isync
+
+ lis r8,cFIR ; Get the Core FIR register address
+ ori r8,r8,0x8000 ; Set to read data
+
+ sync
+
+ mtspr scomc,r8 ; Request the Core FIR
+ mfspr r25,scomd ; Get the source
+ mfspr r8,scomc ; Get back the status (we just ignore it)
+ sync
+ isync
+
+ lis r8,cFIRrst ; Get the Core FIR AND mask address
+
+ sync
+
+ mtspr scomd,r9 ; Set the AND mask to 0
+ mtspr scomc,r8 ; Write the AND mask and clear conditions
+ mfspr r8,scomc ; Get back the status (we just ignore it)
+ sync
+ isync
+
+ lis r8,l2FIR ; Get the L2 FIR register address
+ ori r8,r8,0x8000 ; Set to read data
+
+ sync
+
+ mtspr scomc,r8 ; Request the L2 FIR
+ mfspr r26,scomd ; Get the source
+ mfspr r8,scomc ; Get back the status (we just ignore it)
+ sync
+ isync
+
+ lis r8,l2FIRrst ; Get the L2 FIR AND mask address
+
+ sync
+
+ mtspr scomd,r9 ; Set the AND mask to 0
+ mtspr scomc,r8 ; Write the AND mask and clear conditions
+ mfspr r8,scomc ; Get back the status (we just ignore it)
+ sync
+ isync
+
+ lis r8,busFIR ; Get the Bus FIR register address
+ ori r8,r8,0x8000 ; Set to read data
+
+ sync
+
+ mtspr scomc,r8 ; Request the Bus FIR
+ mfspr r27,scomd ; Get the source
+ mfspr r8,scomc ; Get back the status (we just ignore it)
+ sync
+ isync
+
+ lis r8,busFIRrst ; Get the Bus FIR AND mask address
+
+ sync
+
+ mtspr scomd,r9 ; Set the AND mask to 0
+ mtspr scomc,r8 ; Write the AND mask and clear conditions
+ mfspr r8,scomc ; Get back the status (we just ignore it)
+ sync
+ isync
+
+; Note: bug in early chips where scom reads are shifted right by 1. We fix that here.
+; Also note that we will lose bit 63
+
+ beq++ mckNoFix ; No fix up is needed
+ sldi r24,r24,1 ; Shift left 1
+ sldi r25,r25,1 ; Shift left 1
+ sldi r26,r26,1 ; Shift left 1
+ sldi r27,r27,1 ; Shift left 1
+
+mckNoFix: std r24,savexdat0(r13) ; Save the MCK source in case we pass the error
+ std r25,savexdat1(r13) ; Save the Core FIR in case we pass the error
+ std r26,savexdat2(r13) ; Save the L2 FIR in case we pass the error
+ std r27,savexdat3(r13) ; Save the BUS FIR in case we pass the error
+
+ rlwinm. r0,r20,0,mckIFUE-32,mckIFUE-32 ; Is this some kind of uncorrectable?
+ bne mckUE ; Yeah...
+
+ rlwinm. r0,r20,0,mckLDST-32,mckLDST-32 ; Some kind of load/store error?
+ bne mckHandleLDST ; Yes...
+
+ rldicl. r0,r20,46,62 ; Get the error cause code
+ beq mckNotSure ; We need some more checks for this one...
+
+ cmplwi r0,2 ; Check for TLB parity error
+ blt mckSLBparity ; This is an SLB parity error...
+ bgt mckhIFUE ; This is an IFetch tablewalk reload UE...
+
+; IFetch TLB parity error
+
+ isync
+ tlbiel r23 ; Locally invalidate TLB entry for iaddr
+ sync ; Wait for it
+ b ceMck ; All recovered...
+
+; SLB parity error. This could be software caused. We get one if there is
+; more than 1 valid SLBE with a matching ESID. That one we do not want to
+; try to recover from. Search for it and if we get it, panic.
+
+mckSLBparity:
+ crclr cr0_eq ; Make sure we are not equal so we take correct exit
+
+ la r3,emvr0(r2) ; Use this to keep track of valid ESIDs we find
+ li r5,0 ; Start with index 0
+
+mckSLBck: la r4,emvr0(r2) ; Use this to keep track of valid ESIDs we find
+ slbmfee r6,r5 ; Get the next SLBE
+ andis. r0,r6,0x0800 ; See if valid bit is on
+ beq mckSLBnx ; Skip invalid and go to next
+
+mckSLBck2: cmpld r4,r3 ; Have we reached the end of the table?
+ beq mckSLBne ; Yes, go enter this one...
+ ld r7,0(r4) ; Pick up the saved ESID
+ cmpld r6,r7 ; Is this a match?
+ beq mckSLBrec ; Whoops, I did bad, recover and pass up...
+ addi r4,r4,8 ; Next table entry
+ b mckSLBck2 ; Check the next...
+
+mckSLBnx: addi r5,r5,1 ; Point to next SLBE
+ cmplwi r5,64 ; Have we checked all of them?
+ bne++ mckSLBck ; Not yet, check again...
+ b mckSLBrec ; We looked at them all, go recover...
+
+mckSLBne: std r6,0(r3) ; Save this ESID
+ addi r3,r3,8 ; Point to the new slot
+ b mckSLBnx ; Go do the next SLBE...
+
+; Recover an SLB error
+
+mckSLBrec: li r0,0 ; Set an SLB slot index of 0
+ slbia ; Trash all SLB entries (except for entry 0 that is)
+ slbmfee r7,r0 ; Get the entry that is in SLB index 0
+ rldicr r7,r7,0,35 ; Clear the valid bit and the rest
+ slbie r7 ; Invalidate it
+
+ li r3,0 ; Set the first SLBE
+
+mckSLBclr: slbmte r0,r3 ; Clear the whole entry to 0s
+ addi r3,r3,1 ; Bump index
+ cmplwi cr1,r3,64 ; Have we done them all?
+ bne++ cr1,mckSLBclr ; Yup....
+
+ sth r3,ppInvSeg(r2) ; Store non-zero to trigger SLB reload
+ bne++ ceMck ; This was not a programming error, all recovered...
+ b ueMck ; Pass the software error up...
+
+;
+; Handle a load/store unit error. We need to decode the DSISR
+;
+
+mckHandleLDST:
+ rlwinm. r0,r21,0,mckL1DCPE,mckL1DCPE ; An L1 data cache parity error?
+ bne++ mckL1D ; Yeah, we dealt with this back in the vector...
+
+ rlwinm. r0,r21,0,mckL1DTPE,mckL1DTPE ; An L1 tag error?
+ bne++ mckL1T ; Yeah, we dealt with this back in the vector...
+
+ rlwinm. r0,r21,0,mckUEdfr,mckUEdfr ; Is the a "deferred" UE?
+ bne mckDUE ; Yeah, go see if expected...
+
+ rlwinm. r0,r21,0,mckUETwDfr,mckUETwDfr ; Is the a "deferred" tablewalk UE?
+ bne mckDTW ; Yeah, no recovery...
+
+ rlwinm. r0,r21,0,mckSLBPE,mckSLBPE ; SLB parity error?
+ bne mckSLBparity ; Yeah, go attempt recovery....
+
+; This is a recoverable D-ERAT or TLB error
+
+ la r9,hwMckERCPE(r2) ; Get DERAT parity error count
- lwz r4,MPSSIGPhandler(r4) /* Get the address of the SIGP interrupt filter */
- lhz r3,PP_CPU_FLAGS(r2) /* Get the CPU flags */
- cmplwi cr1,r4,0 /* Check if signal filter is initialized yet */
- andi. r3,r3,LOW_ADDR(SIGPactive) /* See if this processor has started up */
- mtlr r4 /* Load up filter address */
- beq- cr1,notracex /* We don't have a filter yet... */
- beq- notracex /* This processor hasn't started filtering yet... */
+mckInvDAR: isync
+ tlbiel r22 ; Locally invalidate the TLB entry
+ sync
+
+ lwz r21,0(r9) ; Get count
+ addi r21,r21,1 ; Count this one
+ stw r21,0(r9) ; Stick it back
- blrl /* Filter the interrupt */
+ b ceMck ; All recovered...
- mfsprg r2,0 /* Make sure we have the per processor block */
- cmplwi cr0,r3,kMPIOInterruptPending /* See what the filter says */
- li r11,T_INTERRUPT /* Assume we have a regular external 'rupt */
- beq+ modRupt /* Yeah, we figured it would be... */
- li r11,T_SIGP /* Assume we had a signal processor interrupt */
- bgt+ modRupt /* Yeah, at this point we would assume so... */
- li r11,T_IN_VAIN /* Nothing there actually, so eat it */
-
-modRupt: stw r11,PP_SAVE_EXCEPTION_TYPE(r2) /* Set that it was either in vain or a SIGP */
- stw r11,saveexception(r13) /* Save the exception code here also */
- bne- cr5,notracex /* Jump if no tracing... */
- sth r11,LTR_excpt(r20) /* Save the exception type */
-
-notracex:
-
-#if 0
- bf featSMP,nopir6 /* (TEST/DEBUG) */
- mfspr r7,pir /* (TEST/DEBUG) */
- b gotpir6 /* (TEST/DEBUG) */
-nopir6: li r7,0 /* (TEST/DEBUG) */
-gotpir6: /* (TEST/DEBUG) */
- lis r6,HIGH_ADDR(EXT(RuptCtrs)) /* (TEST/DEBUG) */
- rlwinm r7,r7,8,23,23 /* (TEST/DEBUG) */
- lis r12,HIGH_ADDR(EXT(GratefulDeb)) /* (TEST/DEBUG) */
- rlwimi r7,r7,1,22,22 /* (TEST/DEBUG) */
- ori r6,r6,LOW_ADDR(EXT(RuptCtrs)) /* (TEST/DEBUG) */
- rlwinm r1,r11,2,0,29 /* (TEST/DEBUG) */
- add r6,r6,r7 /* (TEST/DEBUG) */
- ori r12,r12,LOW_ADDR(EXT(GratefulDeb)) /* (TEST/DEBUG) */
- lwz r21,(47*16)+8(r6) /* (TEST/DEBUG) */
- lwz r22,(47*16)+12(r6) /* (TEST/DEBUG) */
- add r1,r1,r6 /* (TEST/DEBUG) */
- mftb r24 /* (TEST/DEBUG) */
- sub r22,r24,r22 /* (TEST/DEBUG) */
- lwz r4,4(r6) /* (TEST/DEBUG) */
- cmplw cr2,r22,r21 /* (TEST/DEBUG) */
- lwz r7,4(r1) /* (TEST/DEBUG) */
- lwz r21,8(r6) /* (TEST/DEBUG) */
- blt+ cr2,nottime /* (TEST/DEBUG) */
- stw r24,(47*16)+12(r6) /* (TEST/DEBUG) */
-
-nottime: addi r4,r4,1 /* (TEST/DEBUG) */
- lwz r22,8(r1) /* (TEST/DEBUG) */
- addi r7,r7,1 /* (TEST/DEBUG) */
- stw r4,4(r6) /* (TEST/DEBUG) */
- lwz r3,0(r6) /* (TEST/DEBUG) */
- mr. r21,r21 /* (TEST/DEBUG) */
- stw r7,4(r1) /* (TEST/DEBUG) */
- mtlr r12 /* (TEST/DEBUG) */
- lwz r1,0(r1) /* (TEST/DEBUG) */
- beq- nottimed1 /* (TEST/DEBUG) */
- blt+ cr2,isnttime1 /* (TEST/DEBUG) */
-
-nottimed1: mr. r3,r3 /* (TEST/DEBUG) */
- bgelrl+ /* (TEST/DEBUG) */
-
-isnttime1: mr. r22,r22 /* (TEST/DEBUG) */
- beq- nottimed2 /* (TEST/DEBUG) */
- blt+ cr2,isnttime2 /* (TEST/DEBUG) */
-
-nottimed2: mr. r3,r1 /* (TEST/DEBUG) */
- mtlr r12 /* (TEST/DEBUG) */
- mr r4,r7 /* (TEST/DEBUG) */
- bgelrl+ /* (TEST/DEBUG) */
- mr r3,r11 /* (TEST/DEBUG) */
-
-isnttime2: cmplwi r11,T_DATA_ACCESS /* (TEST/DEBUG) */
- lis r12,HIGH_ADDR(EXT(GratefulDeb)) /* (TEST/DEBUG) */
- bne+ nodsidisp /* (TEST/DEBUG) */
- mr. r22,r22 /* (TEST/DEBUG) */
- beq- nottimed3 /* (TEST/DEBUG) */
- blt+ cr2,nodsidisp /* (TEST/DEBUG) */
-
-nottimed3: li r3,5 /* (TEST/DEBUG) */
- ori r12,r12,LOW_ADDR(EXT(GratefulDeb)) /* (TEST/DEBUG) */
- lwz r4,savesrr0(r13) /* (TEST/DEBUG) */
- mtlr r12 /* (TEST/DEBUG) */
- blrl /* (TEST/DEBUG) */
-
- lis r12,HIGH_ADDR(EXT(GratefulDeb)) /* (TEST/DEBUG) */
- ori r12,r12,LOW_ADDR(EXT(GratefulDeb)) /* (TEST/DEBUG) */
- lis r3,9 /* (TEST/DEBUG) */
- ori r3,r3,5 /* (TEST/DEBUG) */
- mtlr r12 /* (TEST/DEBUG) */
- lwz r4,savedar(r13) /* (TEST/DEBUG) */
- blrl /* (TEST/DEBUG) */
-
-nodsidisp: cmplwi r11,T_INSTRUCTION_ACCESS /* (TEST/DEBUG) */
- lis r12,HIGH_ADDR(EXT(GratefulDeb)) /* (TEST/DEBUG) */
- bne+ noisidisp /* (TEST/DEBUG) */
- mr. r22,r22 /* (TEST/DEBUG) */
- beq- nottimed4 /* (TEST/DEBUG) */
- blt+ cr2,noisidisp /* (TEST/DEBUG) */
-
-nottimed4: li r3,6 /* (TEST/DEBUG) */
- ori r12,r12,LOW_ADDR(EXT(GratefulDeb)) /* (TEST/DEBUG) */
- lwz r4,savesrr0(r13) /* (TEST/DEBUG) */
- mtlr r12 /* (TEST/DEBUG) */
- blrl /* (TEST/DEBUG) */
-
-noisidisp: mr r3,r11 /* (TEST/DEBUG) */
-#endif
-
-#if 0
- cmplwi r11,T_PROGRAM /* (TEST/DEBUG) */
- lis r12,HIGH_ADDR(EXT(GratefulDeb)) /* (TEST/DEBUG) */
- bne+ nopgmdisp /* (TEST/DEBUG) */
- li r3,7 /* (TEST/DEBUG) */
- ori r12,r12,LOW_ADDR(EXT(GratefulDeb)) /* (TEST/DEBUG) */
- lwz r4,savesrr0(r13) /* (TEST/DEBUG) */
- mtlr r12 /* (TEST/DEBUG) */
- blrl /* (TEST/DEBUG) */
-
-nopgmdisp: mr r3,r11 /* (TEST/DEBUG) */
-#endif
-
- li r21,0 ; Assume no processor register for now
- lis r12,hi16(EXT(hw_counts)) ; Get the high part of the interrupt counters
- bf featSMP,nopirhere ; Jump if this processor does not have a PIR...
- mfspr r21,pir ; Get the PIR
-
-nopirhere: ori r12,r12,lo16(EXT(hw_counts)) ; Get the low part of the interrupt counters
- lwz r7,savesrr1(r13) ; Get the entering MSR
- rlwinm r21,r21,8,20,23 ; Get index to processor counts
- mtcrf 0x80,r0 /* Set our CR0 to the high nybble of the request code */
- rlwinm r6,r0,1,0,31 /* Move sign bit to the end */
- cmplwi cr1,r11,T_SYSTEM_CALL /* Did we get a system call? */
- crandc cr0_lt,cr0_lt,cr0_gt /* See if we have R0 equal to 0b10xx...x */
- add r12,r12,r21 ; Point to the processor count area
- cmplwi cr3,r11,T_IN_VAIN /* Was this all in vain? All for nothing? */
- lwzx r22,r12,r11 ; Get the old value
- cmplwi cr2,r6,1 /* See if original R0 had the CutTrace request code in it */
- addi r22,r22,1 ; Count this one
- cmplwi cr4,r11,T_SIGP /* Indicate if we had a SIGP 'rupt */
- stwx r22,r12,r11 ; Store it back
-
- beq- cr3,EatRupt /* Interrupt was all for nothing... */
- cmplwi cr3,r11,T_MACHINE_CHECK ; Did we get a machine check?
- bne+ cr1,noCutT /* Not a system call... */
- bnl+ cr0,noCutT /* R0 not 0b10xxx...x, can't be any kind of magical system call... */
- rlwinm. r7,r7,0,MSR_PR_BIT,MSR_PR_BIT ; Did we come from user state?
- lis r1,hi16(EXT(dgWork)) ; Get the diagnostics flags
- beq+ FCisok ; From supervisor state...
+;
+; When we come here, we are not quite sure what the error is. We need to
+; dig a bit further.
+;
+; R24 is interrupt source
+; R25 is Core FIR
+;
+; Note that both have been cleared already.
+;
- ori r1,r1,lo16(EXT(dgWork)) ; Again
- lwz r1,dgFlags(r1) ; Get the flags
- rlwinm. r1,r1,0,enaUsrFCallb,enaUsrFCallb ; Are they valid?
- beq- noCutT ; No...
+mckNotSure:
+ rldicl. r0,r24,AsyMCKfir+1,63 ; Something in the FIR?
+ bne-- mckFIR ; Yup, go check some more...
+
+ rldicl. r0,r24,AsyMCKhri+1,63 ; Hang recovery?
+ bne-- mckHangRcvr ; Yup...
+
+ rldicl. r0,r24,AsyMCKext+1,63 ; External signal?
+ bne-- mckExtMck ; Yup...
-FCisok: beq- cr2,isCutTrace /* This is a CutTrace system call */
+;
+; We really do not know what this one is or what to do with it...
+;
-/*
- * Here's where we call the firmware. If it returns T_IN_VAIN, that means
- * that it has handled the interruption. Remember: thou shalt not trash R13
- * or R20 while you are away. Anything else is ok.
- */
-
- lis r1,hi16(EXT(FirmwareCall)) /* Top half of firmware call handler */
- ori r1,r1,lo16(EXT(FirmwareCall)) /* Bottom half of it */
- lwz r3,saver3(r13) /* Restore the first parameter, the rest are ok already */
- mtlr r1 /* Get it in the link register */
- blrl /* Call the handler */
-
- cmplwi r3,T_IN_VAIN /* Was it handled? */
- mfsprg r2,0 /* Restore the per_processor area */
- beq+ EatRupt /* Interrupt was handled... */
- mr r11,r3 /* Put the 'rupt code in the right register */
- b noSIGP /* Go to the normal system call handler */
-
-isCutTrace:
- li r7,-32768 /* Get a 0x8000 for the exception code */
- bne- cr5,EatRupt /* Tracing is disabled... */
- sth r7,LTR_excpt(r20) /* Modify the exception type to a CutTrace */
- b EatRupt /* Time to go home... */
-
-/* We are here 'cause we didn't have a CutTrace system call */
-
-noCutT: beq- cr3,MachineCheck ; Whoa... Machine check...
- bne+ cr4,noSIGP /* Skip away if we didn't get a SIGP... */
-
- lis r6,HIGH_ADDR(EXT(MPsignalFW)) /* Top half of SIGP handler */
- ori r6,r6,LOW_ADDR(EXT(MPsignalFW)) /* Bottom half of it */
- mtlr r6 /* Get it in the link register */
+mckUnk: lwz r21,hwMckUnk(r2) ; Get unknown error count
+ addi r21,r21,1 ; Count it
+ stw r21,hwMckUnk(r2) ; Stuff it
+ b ueMck ; Go south, young man...
+
+;
+; Hang recovery. This is just a notification so we only count.
+;
- blrl /* Call the handler - we'll only come back if this is an AST, */
- /* 'cause FW can't handle that */
- mfsprg r2,0 /* Restore the per_processor area */
+mckHangRcrvr:
+ lwz r21,hwMckHang(r2) ; Get hang recovery count
+ addi r21,r21,1 ; Count this one
+ stw r21,hwMckHang(r2) ; Stick it back
+ b ceMck ; All recovered...
+
;
-; The following interrupts are the only ones that can be redriven
-; by the higher level code or emulation routines.
+; Externally signaled MCK. No recovery for the moment, but we this may be
+; where we handle ml_probe_read problems eventually.
+;
+mckExtMck:
+ lwz r21,hwMckHang(r2) ; Get hang recovery count
+ addi r21,r21,1 ; Count this one
+ stw r21,hwMckHang(r2) ; Stick it back
+ b ceMck ; All recovered...
+
;
+; Machine check cause is in a FIR. Suss it out here.
+; Core FIR is in R25 and has been cleared in HW.
+;
-Redrive: cmplwi cr0,r3,T_IN_VAIN /* Did the signal handler eat the signal? */
- mr r11,r3 /* Move it to the right place */
- beq+ cr0,EatRupt /* Bail now if the signal handler processed the signal... */
+mckFIR: rldicl. r0,r25,cFIRICachePE+1,63 ; I-Cache parity error?
+ la r19,hwMckICachePE(r2) ; Point to counter
+ bne mckInvICache ; Go invalidate I-Cache...
+ rldicl. r0,r25,cFIRITagPE0+1,63 ; I-Cache tag parity error?
+ la r19,hwMckITagPE(r2) ; Point to counter
+ bne mckInvICache ; Go invalidate I-Cache...
-/*
- * Here's where we check for the other fast-path exceptions: translation exceptions,
- * emulated instructions, etc.
- */
+ rldicl. r0,r25,cFIRITagPE1+1,63 ; I-Cache tag parity error?
+ la r19,hwMckITagPE(r2) ; Point to counter
+ bne mckInvICache ; Go invalidate I-Cache...
-noSIGP: cmplwi cr3,r11,T_ALTIVEC_ASSIST ; Check for an Altivec denorm assist
- cmplwi cr1,r11,T_PROGRAM /* See if we got a program exception */
- cmplwi cr2,r11,T_INSTRUCTION_ACCESS /* Check on an ISI */
- bne+ cr3,noAltivecAssist ; It is not an assist...
- b EXT(AltivecAssist) ; It is an assist...
+ rldicl. r0,r25,cFIRIEratPE+1,63 ; IERAT parity error?
+ la r19,hwMckIEratPE(r2) ; Point to counter
+ bne mckInvERAT ; Go invalidate ERATs...
-noAltivecAssist:
- bne+ cr1,noEmulate ; No emulation here...
- b EXT(Emulate) ; Go try to emulate...
+ rldicl. r0,r25,cFIRIFUL2UE+1,63 ; IFetch got L2 UE?
+ bne mckhIFUE ; Go count and pass up...
-noEmulate: cmplwi cr3,r11,T_CSWITCH /* Are we context switching */
- cmplwi r11,T_DATA_ACCESS /* Check on a DSI */
- beq- cr2,DSIorISI /* It's a PTE fault... */
- beq- cr3,conswtch /* It's a context switch... */
- bne+ PassUp /* It's not a PTE fault... */
+ rldicl. r0,r25,cFIRDCachePE+1,63 ; D-Cache PE?
+ bne mckL1D ; Handled, just go count...
-/*
- * This call will either handle the fault, in which case it will not
- * return, or return to pass the fault up the line.
- */
+ rldicl. r0,r25,cFIRDTagPE+1,63 ; D-Cache tag PE?
+ bne mckL1T ; Handled, just go count...
-DSIorISI:
- lis r7,HIGH_ADDR(EXT(handlePF)) /* Top half of DSI handler */
- ori r7,r7,LOW_ADDR(EXT(handlePF)) /* Bottom half of it */
- mtlr r7 /* Get it in the link register */
- mr r3,r11 /* Move the 'rupt code */
-
- blrl /* See if we can handle this fault */
-
- lwz r0,savesrr1(r13) ; Get the MSR in use at exception time
- mfsprg r2, 0 /* Get back per_proc */
- cmplwi cr1,r3,T_IN_VAIN ; Was it handled?
- andi. r4,r0,lo16(MASK(MSR_RI)) ; See if the recover bit is on
- mr r11,r3 /* Make sure we can find this later */
- beq+ cr1,EatRupt ; Yeah, just blast back to the user...
- andc r0,r0,r4 ; Remove the recover bit
- beq+ PassUp ; Not on, normal case...
- lwz r4,savesrr0(r13) ; Get the failing instruction address
- lwz r5,savecr(r13) ; Get the condition register
- stw r0,savesrr1(r13) ; Save the result MSR
- addi r4,r4,4 ; Skip failing instruction
- rlwinm r5,r5,0,3,1 ; Clear CR0_EQ to let emulation code know we failed
- stw r4,savesrr0(r13) ; Save instruction address
- stw r4,savecr(r13) ; And the resume CR
- b EatRupt ; Resume emulated code
+ rldicl. r0,r25,cFIRDEratPE+1,63 ; DERAT PE?
+ la r19,hwMckDEratPE(r2) ; Point to counter
+ bne mckInvERAT ; Go invalidate ERATs...
-/*
- * Here is where we handle the context switch firmware call. The old
- * context has been saved, and the new savearea in in saver3. We'll just
- * muck around with the savearea pointers, and then join the exit routine
- */
-conswtch: lwz r28,SAVflags(r13) /* The the flags of the current */
- mr r29,r13 /* Save the save */
- rlwinm r30,r13,0,0,19 /* Get the start of the savearea block */
- lwz r5,saver3(r13) /* Switch to the new savearea */
- oris r28,r28,HIGH_ADDR(SAVattach) /* Turn on the attached flag */
- lwz r30,SACvrswap(r30) /* get real to virtual translation */
- mr r13,r5 /* Switch saveareas */
- xor r27,r29,r30 /* Flip to virtual */
- stw r28,SAVflags(r29) /* Stash it back */
- stw r27,saver3(r5) /* Push the new savearea to the switch to routine */
- b EatRupt /* Start 'er up... */
+ rldicl. r0,r25,cFIRTLBPE+1,63 ; TLB PE?
+ la r9,hwMckTLBPE(r2) ; Get TLB parity error count
+ bne mckInvDAR ; Go recover...
+
+ rldicl. r0,r25,cFIRSLBPE+1,63 ; SLB PE?
+ bne mckSLBparity ; Cope with it...
+
+ b mckUnk ; Have not a clue...
;
-; Handle machine check here.
-;
-; ?
+; General recovery for I-Cache errors. Just flush it completely.
;
-MachineCheck:
- lwz r27,savesrr1(r13) ; ?
- rlwinm. r11,r27,0,dcmck,dcmck ; ?
- beq+ notDCache ; ?
+
+ .align 7 ; Force into cache line
+
+mckInvICache:
+ lis r0,0x0080 ; Get a 0x0080 (bit 9 >> 32)
+ mfspr r21,hid1 ; Get the current HID1
+ sldi r0,r0,32 ; Get the "forced ICBI match" bit
+ or r0,r0,r21 ; Set forced match
- mfspr r11,msscr0 ; ?
- dssall ; ?
- sync
+ isync
+ mtspr hid1,r0 ; Stick it
+ mtspr hid1,r0 ; Stick it again
+ isync
+
+ li r6,0 ; Start at 0
- lwz r27,savesrr1(r13) ; ?
+mckIcbi: icbi 0,r6 ; Kill I$
+ addi r6,r6,128 ; Next line
+ andis. r5,r6,1 ; Have we done them all?
+ beq++ mckIcbi ; Not yet...
-hiccup: cmplw r27,r27 ; ?
- bne- hiccup ; ?
- isync ; ?
+ isync
+ mtspr hid1,r21 ; Restore original HID1
+ mtspr hid1,r21 ; Stick it again
+ isync
- oris r11,r11,hi16(dl1hwfm) ; ?
- mtspr msscr0,r11 ; ?
+ lwz r5,0(r19) ; Get the counter
+ addi r5,r5,1 ; Count it
+ stw r5,0(r19) ; Stuff it back
+ b ceMck ; All recovered...
-rstbsy: mfspr r11,msscr0 ; ?
+
+; General recovery for ERAT problems - handled in exception vector already
+
+mckInvERAT: lwz r21,0(r19) ; Get the exception count spot
+ addi r21,r21,1 ; Count this one
+ stw r21,0(r19) ; Save count
+ b ceMck ; All recovered...
- rlwinm. r11,r11,0,dl1hwf,dl1hwf ; ?
- bne rstbsy ; ?
+; General hang recovery - this is a notification only, just count.
- sync ; ?
+mckHangRcvr:
+ lwz r21,hwMckHang(r2) ; Get hang recovery count
+ addi r21,r21,1 ; Count this one
+ stw r21,hwMckHang(r2) ; Stick it back
+ b ceMck ; All recovered...
- li r11,T_IN_VAIN ; ?
- b EatRupt ; ?
-
-notDCache:
-;
-; Check if the failure was in
-; ml_probe_read. If so, this is expected, so modify the PC to
-; ml_proble_read_mck and then eat the exception.
;
- lwz r30,savesrr0(r13) ; Get the failing PC
- lis r28,hi16(EXT(ml_probe_read_mck)) ; High order part
- lis r27,hi16(EXT(ml_probe_read)) ; High order part
- ori r28,r28,lo16(EXT(ml_probe_read_mck)) ; Get the low part
- ori r27,r27,lo16(EXT(ml_probe_read)) ; Get the low part
- cmplw r30,r28 ; Check highest possible
- cmplw cr1,r30,r27 ; Check lowest
- bge- PassUp ; Outside of range
- blt- cr1,PassUp ; Outside of range
+; These are the uncorrectable errors, just count them then pass it along.
;
-; We need to fix up the BATs here because the probe
-; routine messed them all up... As long as we are at it,
-; fix up to return directly to caller of probe.
+
+mckUE: lwz r21,hwMckUE(r2) ; Get general uncorrectable error count
+ addi r21,r21,1 ; Count it
+ stw r21,hwMckUE(r2) ; Stuff it
+ b ueMck ; Go south, young man...
+
+mckhIFUE: lwz r21,hwMckIUEr(r2) ; Get I-Fetch TLB reload uncorrectable error count
+ addi r21,r21,1 ; Count it
+ stw r21,hwMckIUEr(r2) ; Stuff it
+ b ueMck ; Go south, young man...
+
+mckDUE: lwz r21,hwMckDUE(r2) ; Get deferred uncorrectable error count
+ addi r21,r21,1 ; Count it
+ stw r21,hwMckDUE(r2) ; Stuff it
+
;
-
- lwz r30,saver5(r13) ; Get proper DBAT values
- lwz r28,saver6(r13)
- lwz r27,saver7(r13)
- lwz r11,saver8(r13)
- lwz r18,saver9(r13)
+; Right here is where we end up after a failure on a ml_probe_read_64.
+; We will check if that is the case, and if so, fix everything up and
+; return from it.
+
+ lis r8,hi16(EXT(ml_probe_read_64)) ; High of start
+ lis r9,hi16(EXT(ml_probe_read_mck_64)) ; High of end
+ ori r8,r8,lo16(EXT(ml_probe_read_64)) ; Low of start
+ ori r9,r9,lo16(EXT(ml_probe_read_mck_64)) ; Low of end
+ cmpld r23,r8 ; Too soon?
+ cmpld cr1,r23,r9 ; Too late?
+
+ cror cr0_lt,cr0_lt,cr1_gt ; Too soon or too late?
+ ld r3,saver12(r13) ; Get the original MSR
+ ld r5,savelr(r13) ; Get the return address
+ li r4,0 ; Get fail code
+ blt-- ueMck ; This is a normal machine check, just pass up...
+ std r5,savesrr0(r13) ; Set the return MSR
+
+ std r3,savesrr1(r13) ; Set the return address
+ std r4,saver3(r13) ; Set failure return code
+ b ceMck ; All recovered...
+
+mckDTW: lwz r21,hwMckDTW(r2) ; Get deferred tablewalk uncorrectable error count
+ addi r21,r21,1 ; Count it
+ stw r21,hwMckDTW(r2) ; Stuff it
+ b ueMck ; Go south, young man...
+
+mckL1D: lwz r21,hwMckL1DPE(r2) ; Get data cache parity error count
+ addi r21,r21,1 ; Count it
+ stw r21,hwMckL1DPE(r2) ; Stuff it
+ b ceMck ; All recovered...
+
+mckL1T: lwz r21,hwMckL1TPE(r2) ; Get TLB parity error count
+ addi r21,r21,1 ; Count it
+ stw r21,hwMckL1TPE(r2) ; Stuff it
+
+ceMck: lwz r21,mckFlags(0) ; Get the flags
+ li r0,1 ; Set the recovered flag before passing up
+ rlwinm. r21,r21,0,31,31 ; Check if we want to log recoverables
+ stw r0,savemisc3(r13) ; Set it
+ beq++ EatRupt ; No log of recoverables wanted...
+ b PassUpTrap ; Go up and log error...
+
+ueMck: li r0,0 ; Set the unrecovered flag before passing up
+ stw r0,savemisc3(r13) ; Set it
+ b PassUpTrap ; Go up and log error and probably panic
- sync
- mtdbatu 0,r30 ; Restore DBAT 0 high
- mtdbatl 0,r28 ; Restore DBAT 0 low
- mtdbatu 1,r27 ; Restore DBAT 1 high
- mtdbatu 2,r11 ; Restore DBAT 2 high
- mtdbatu 3,r18 ; Restore DBAT 3 high
- sync
-
- lwz r28,savelr(r13) ; Get return point
- lwz r27,saver0(r13) ; Get the saved MSR
- li r30,0 ; Get a failure RC
- stw r28,savesrr0(r13) ; Set the return point
- stw r27,savesrr1(r13) ; Set the continued MSR
- stw r30,saver3(r13) ; Set return code
- li r11,T_IN_VAIN ; Set new interrupt code
- b EatRupt ; Yum, yum, eat it all up...
/*
* Here's where we come back from some instruction emulator. If we come back with
* T_IN_VAIN, the emulation is done and we should just reload state and directly
* go back to the interrupted code. Otherwise, we'll check to see if
* we need to redrive with a different interrupt, i.e., DSI.
+ * Note that this we are actually not redriving the rupt, rather changing it
+ * into a different one. Thus we clear the redrive bit.
*/
.align 5
LEXT(EmulExit)
- cmplwi r11,T_IN_VAIN /* Was it emulated? */
+ cmplwi cr1,r11,T_IN_VAIN ; Was it emulated?
lis r1,hi16(SAVredrive) ; Get redrive request
- mfsprg r2,0 ; Restore the per_proc area
- beq+ EatRupt /* Yeah, just blast back to the user... */
+ beq++ cr1,EatRupt ; Yeah, just blast back to the user...
lwz r4,SAVflags(r13) ; Pick up the flags
and. r0,r4,r1 ; Check if redrive requested
- andc r4,r4,r1 ; Clear redrive
- beq+ PassUp ; No redrive, just keep on going...
+ beq++ PassUpTrap ; No redrive, just keep on going...
- lwz r3,saveexception(r13) ; Restore exception code
- stw r4,SAVflags(r13) ; Set the flags
b Redrive ; Redrive the exception...
-/* Jump into main handler code switching on VM at the same time */
+;
+; Jump into main handler code switching on VM at the same time.
+;
+; We assume kernel data is mapped contiguously in physical
+; memory, otherwise we would need to switch on (at least) virtual data.
+; SRs are already set up.
+;
+
+ .align 5
+
+PassUpTrap: lis r20,hi16(EXT(thandler)) ; Get thandler address
+ ori r20,r20,lo16(EXT(thandler)) ; Get thandler address
+ b PassUp ; Go pass it up...
+
+PassUpRupt: lis r20,hi16(EXT(ihandler)) ; Get ihandler address
+ ori r20,r20,lo16(EXT(ihandler)) ; Get ihandler address
+ b PassUp ; Go pass it up...
+
+ .align 5
+
+PassUpFPU: lis r20,hi16(EXT(fpu_switch)) ; Get FPU switcher address
+ ori r20,r20,lo16(EXT(fpu_switch)) ; Get FPU switcher address
+ b PassUp ; Go pass it up...
+
+PassUpVMX: lis r20,hi16(EXT(vec_switch)) ; Get VMX switcher address
+ ori r20,r20,lo16(EXT(vec_switch)) ; Get VMX switcher address
+ bt++ featAltivec,PassUp ; We have VMX on this CPU...
+ li r11,T_PROGRAM ; Say that it is a program exception
+ li r20,8 ; Set invalid instruction
+ stw r11,saveexception(r13) ; Set the new the exception code
+ sth r20,savesrr1+4(r13) ; Set the invalid instruction SRR code
+
+ b PassUpTrap ; Go pass it up...
+
+ .align 5
+
+PassUpAbend:
+ lis r20,hi16(EXT(chandler)) ; Get choke handler address
+ ori r20,r20,lo16(EXT(chandler)) ; Get choke handler address
+ b PassUp ; Go pass it up...
-/* We assume kernel data is mapped contiguously in physical
- * memory, otherwise we'd need to switch on (at least) virtual data.
- * SRs are already set up.
- */
-PassUp: lis r2,hi16(EXT(exception_handlers)) ; Get exception vector address
- ori r2,r2,lo16(EXT(exception_handlers)) ; And low half
- lwzx r6,r2,r11 /* Get the actual exception handler address */
-
-PassUpDeb: lwz r8,SAVflags(r13) /* Get the flags */
- mtsrr0 r6 /* Set up the handler address */
- oris r8,r8,HIGH_ADDR(SAVattach) /* Since we're passing it up, attach it */
- rlwinm r5,r13,0,0,19 /* Back off to the start of savearea block */
-
- mfmsr r3 /* Get our MSR */
- stw r8,SAVflags(r13) /* Pass up the flags */
- rlwinm r3,r3,0,MSR_BE_BIT+1,MSR_SE_BIT-1 /* Clear all but the trace bits */
- li r2,MSR_SUPERVISOR_INT_OFF /* Get our normal MSR value */
- lwz r5,SACvrswap(r5) /* Get real to virtual conversion */
- or r2,r2,r3 /* Keep the trace bits if they're on */
- mr r3,r11 /* Pass the exception code in the paramter reg */
- mtsrr1 r2 /* Set up our normal MSR value */
- xor r4,r13,r5 /* Pass up the virtual address of context savearea */
-
- rfi /* Launch the exception handler */
-
- .long 0 /* Leave these here gol durn it! */
- .long 0
- .long 0
- .long 0
- .long 0
- .long 0
- .long 0
- .long 0
+ .align 5
+
+PassUp:
+#if INSTRUMENT
+ mfspr r29,pmc1 ; INSTRUMENT - saveinstr[11] - Take stamp at passup or eatrupt
+ stw r29,0x6100+(11*16)+0x0(0) ; INSTRUMENT - Save it
+ mfspr r29,pmc2 ; INSTRUMENT - Get stamp
+ stw r29,0x6100+(11*16)+0x4(0) ; INSTRUMENT - Save it
+ mfspr r29,pmc3 ; INSTRUMENT - Get stamp
+ stw r29,0x6100+(11*16)+0x8(0) ; INSTRUMENT - Save it
+ mfspr r29,pmc4 ; INSTRUMENT - Get stamp
+ stw r29,0x6100+(11*16)+0xC(0) ; INSTRUMENT - Save it
+#endif
+
+ lwz r10,SAVflags(r13) ; Pick up the flags
+
+ li r0,0xFFF ; Get a page mask
+ li r2,MASK(MSR_BE)|MASK(MSR_SE) ; Get the mask to save trace bits
+ andc r5,r13,r0 ; Back off to the start of savearea block
+ mfmsr r3 ; Get our MSR
+ rlwinm r10,r10,0,SAVredriveb+1,SAVredriveb-1 ; Clear the redrive before we pass it up
+ li r21,MSR_SUPERVISOR_INT_OFF ; Get our normal MSR value
+ and r3,r3,r2 ; Clear all but trace
+ lwz r5,SACvrswap+4(r5) ; Get real to virtual conversion
+ or r21,r21,r3 ; Keep the trace bits if they are on
+ stw r10,SAVflags(r13) ; Set the flags with the cleared redrive flag
+
+ xor r4,r13,r5 ; Pass up the virtual address of context savearea
+ mfsprg r29,0 ; Get the per_proc block back
+ rlwinm r4,r4,0,0,31 ; Clean top half of virtual savearea if 64-bit
+
+ mr r3,r21 ; Pass in the MSR we will go to
+ bl EXT(switchSegs) ; Go handle the segment registers/STB
+
+#if INSTRUMENT
+ mfspr r30,pmc1 ; INSTRUMENT - saveinstr[7] - Take stamp afer switchsegs
+ stw r30,0x6100+(7*16)+0x0(0) ; INSTRUMENT - Save it
+ mfspr r30,pmc2 ; INSTRUMENT - Get stamp
+ stw r30,0x6100+(7*16)+0x4(0) ; INSTRUMENT - Save it
+ mfspr r30,pmc3 ; INSTRUMENT - Get stamp
+ stw r30,0x6100+(7*16)+0x8(0) ; INSTRUMENT - Save it
+ mfspr r30,pmc4 ; INSTRUMENT - Get stamp
+ stw r30,0x6100+(7*16)+0xC(0) ; INSTRUMENT - Save it
+#endif
+ lwz r3,saveexception(r13) ; Recall the exception code
+
+ mtsrr0 r20 ; Set up the handler address
+ mtsrr1 r21 ; Set up our normal MSR value
+
+ bt++ pf64Bitb,puLaunch ; Handle 64-bit machine...
+
+ rfi ; Launch the exception handler
+
+puLaunch: rfid ; Launch the exception handler
/*
- * This routine is the only place where we return from an interruption.
- * Anyplace else is wrong. Even if I write the code, it's still wrong.
- * Feel free to come by and slap me if I do do it--even though I may
- * have had a good reason to do it.
+ * This routine is the main place where we return from an interruption.
+ *
+ * This is also where we release the quickfret list. These are saveareas
+ * that were released as part of the exception exit path in hw_exceptions.
+ * In order to save an atomic operation (which actually will not work
+ * properly on a 64-bit machine) we use holdQFret to indicate that the list
+ * is in flux and should not be looked at here. This comes into play only
+ * when we take a PTE miss when we are queuing a savearea onto qfret.
+ * Quite rare but could happen. If the flag is set, this code does not
+ * release the list and waits until next time.
*
* All we need to remember here is that R13 must point to the savearea
* that has the context we need to load up. Translation and interruptions
* is any tomfoolery with savearea stacks, it must be taken care of
* before we get here.
*
- * Speaking of tomfoolery, this is where we synthesize interruptions
- * if any need to be.
*/
.align 5
-EatRupt: mr r31,r13 /* Move the savearea pointer to the far end of the register set */
-
-EatRupt2: mfsprg r2,0 /* Get the per_proc block */
- dcbt 0,r31 ; Get this because we need it very soon
-
-#if TRCSAVE
- lwz r30,saver0(r31) ; (TEST/DEBUG) Get users R0
- lwz r20,saveexception(r31) ; (TEST/DEBUG) Returning from trace?
- xor r30,r20,r30 ; (TEST/DEBUG) Make code
- rlwinm r30,r30,1,0,31 ; (TEST/DEBUG) Make an easy test
- cmplwi cr5,r30,0x61 ; (TEST/DEBUG) See if this is a trace
-#endif
-
-/*
- * First we see if we are able to free the new savearea.
- * If it is not attached to anything, put it on the free list.
- * This is real dangerous, we haven't restored context yet...
- * So, the free savearea chain lock must stay until the bitter end!
- */
-
-/*
- * It's dangerous here. We haven't restored anything from the current savearea yet.
- * And, we mark it the active one. So, if we get an exception in here, it is
- * unrecoverable. Unless we mess up, we can't get any kind of exception. So,
- * it is important to assay this code as only the purest of gold.
- *
- * But first, see if there is a savearea hanging off of quickfret. If so,
- * we release that one first and then come back for the other. We should rarely
- * see one, they appear when FPU or VMX context is discarded by either returning
- * to a higher exception level, or explicitly.
- *
- * A word about QUICKFRET: Multiple saveareas may be queued for release. It is
- * the responsibility of the queuer to insure that the savearea is not multiply
- * queued and that the appropriate inuse bits are reset.
- */
+EatRupt: mfsprg r29,0 ; Get the per_proc block back
+ mr r31,r13 ; Move the savearea pointer to the far end of the register set
+ mfsprg r27,2 ; Get the processor features
+
+ lwz r3,holdQFret(r29) ; Get the release hold off flag
-
+ bt++ pf64Bitb,eat64a ; Skip down to the 64-bit version of this
- mfsprg r27,2 ; Get the processor features
- lwz r1,savesrr1(r31) ; Get destination MSR
- mtcrf 0x60,r27 ; Set CRs with thermal facilities
- mr r18,r31 ; Save the savearea pointer
- rlwinm. r0,r1,0,MSR_EE_BIT,MSR_EE_BIT ; Are interruptions going to be enabled?
- lwz r19,PP_QUICKFRET(r2) ; Get the quick release savearea
- crandc 31,pfThermalb,pfThermIntb ; See if we have both thermometer and not interrupt facility
- li r0,0 ; Get a zero
- crandc 31,31,cr0_eq ; Factor in enablement
- la r21,savesr0(r18) ; Point to the first thing we restore
- bf 31,tempisok ; No thermal checking needed...
-
-;
-; We get to here if 1) there is a thermal facility, and 2) the hardware
-; will or cannot interrupt, and 3) the interrupt will be enabled after this point.
-;
-
- mfspr r16,thrm3 ; Get thermal 3
- mfspr r14,thrm1 ; Get thermal 2
- rlwinm. r16,r16,0,thrme,thrme ; Is the themometer enabled?
- mfspr r15,thrm2 ; Get thermal 2
- beq- tempisok ; No thermometer...
- rlwinm r16,r14,2,28,31 ; Cluster THRM1s TIE, V, TIN, and TIV at bottom 4 bits
- srawi r0,r15,31 ; Make a mask of 1s if temprature over
- rlwinm r30,r15,2,28,31 ; Cluster THRM2s TIE, V, TIN, and TIV at bottom 4 bits
-;
-; Note that the following compare check that V, TIN, and TIV are set and that TIE is cleared.
-; This insures that we only emulate when the hardware is not set to interrupt.
-;
- cmplwi cr0,r16,7 ; Is there a valid pending interruption for THRM1?
- cmplwi cr1,r30,7 ; Is there a valid pending interruption for THRM2?
- and r15,r15,r0 ; Keep high temp if that interrupted, zero if not
- cror cr0_eq,cr0_eq,cr1_eq ; Merge both
- andc r14,r14,r0 ; Keep low if high did not interrupt, zero if it did
- bne+ tempisok ; Nope, temprature is in range
-
- li r3,T_THERMAL ; Time to emulate a thermal interruption
- or r14,r14,r15 ; Get contents of interrupting register
- mr r13,r31 ; Make sure savearea is pointed to correctly
- stw r3,saveexception(r31) ; Restore exception code
- stw r14,savedar(r31) ; Set the contents of the interrupting register into the dar
- b Redrive ; Go process this new interruption...
-
-
-tempisok: lis r30,HIGH_ADDR(EXT(saveanchor)) /* Get the high part of the anchor */
- stw r0,PP_QUICKFRET(r2) /* Clear quickfret pointer */
- ori r30,r30,LOW_ADDR(EXT(saveanchor)) /* Bottom half of the anchor */
- dcbt 0,r21 /* Touch in the first thing */
-
-#if TRCSAVE
- beq- cr5,trkill0 ; (TEST/DEBUG) Do not trace this type
- lwz r14,LOW_ADDR(traceMask-EXT(ExceptionVectorsStart))(br0) ; (TEST/DEBUG) Get the trace mask
- mr. r14,r14 ; (TEST/DEBUG) Is it stopped?
- beq- trkill0 ; (TEST/DEBUG) yes...
- bl cte ; (TEST/DEBUG) Trace this
- stw r18,LTR_r1(r20) ; (TEST/DEBUG) Normal savearea
- stw r19,LTR_r2(r20) ; (TEST/DEBUG) Quickfret savearea
-trkill0:
-#endif
+;
+; This starts the 32-bit version
+;
-rtlck: lwarx r22,0,r30 /* Grab the lock value */
- li r23,1 /* Use part of the delay time */
- mr. r22,r22 /* Is it locked? */
- bne- rtlcks /* Yeah, wait for it to clear... */
- stwcx. r23,0,r30 /* Try to seize that there durn lock */
- beq+ fretagain ; Got it...
- b rtlck /* Collision, try again... */
-
-rtlcks: lwz r22,SVlock(r30) /* Get that lock in here */
- mr. r22,r22 /* Is it free yet? */
- beq+ rtlck /* Yeah, try for it again... */
- b rtlcks /* Sniff away... */
-
-;
-; Lock gotten, toss the saveareas
-;
-fretagain:
-#if TRCSAVE
- beq- cr5,trkill1 ; (TEST/DEBUG) Do not trace this type
- lwz r14,LOW_ADDR(traceMask-EXT(ExceptionVectorsStart))(br0) ; (TEST/DEBUG) Get the trace mask
- mr. r14,r14 ; (TEST/DEBUG) Is it stopped?
- beq- trkill1 ; (TEST/DEBUG) yes...
- li r0,1 ; (TEST/DEBUG) ID number
- bl cte ; (TEST/DEBUG) Trace this
- stw r18,LTR_r1(r20) ; (TEST/DEBUG) Normal savearea
- stw r19,LTR_r2(r20) ; (TEST/DEBUG) Quickfret savearea
-trkill1:
-#endif
+ mr. r3,r3 ; Should we hold off the quick release?
+ lwz r30,quickfret+4(r29) ; Pick up the quick fret list, if any
+ la r21,saver0(r31) ; Point to the first thing we restore
+ bne- ernoqfret ; Hold off set, do not release just now...
- mr. r18,r18 ; Are we actually done here?
- beq- donefret ; Yeah...
- mr. r31,r19 ; Is there a quickfret to do?
- beq+ noqfrt ; Nope...
- lwz r19,SAVqfret(r19) ; Yes, get the next in line
-#if TRCSAVE
- beq- cr5,trkill2 ; (TEST/DEBUG) Do not trace this type
- lwz r14,LOW_ADDR(traceMask-EXT(ExceptionVectorsStart))(br0) ; (TEST/DEBUG) Get the trace mask
- mr. r14,r14 ; (TEST/DEBUG) Is it stopped?
- beq- trkill2 ; (TEST/DEBUG) yes...
- li r0,2 ; (TEST/DEBUG) ID number
- bl cte ; (TEST/DEBUG) Trace this
- stw r18,LTR_r1(r20) ; (TEST/DEBUG) Normal savearea
- stw r19,LTR_r2(r20) ; (TEST/DEBUG) next quickfret savearea
- stw r31,LTR_r3(r20) ; (TEST/DEBUG) Current one to toss
-trkill2:
-#endif
- b doqfrt ; Go do it...
-
-noqfrt: mr r31,r18 ; Set the area to release
- li r18,0 ; Show we have done it
-#if TRCSAVE
- beq- cr5,trkill3 ; (TEST/DEBUG) Do not trace this type
- lwz r14,LOW_ADDR(traceMask-EXT(ExceptionVectorsStart))(br0) ; (TEST/DEBUG) Get the trace mask
- mr. r14,r14 ; (TEST/DEBUG) Is it stopped?
- beq- trkill3 ; (TEST/DEBUG) yes...
- li r0,3 ; (TEST/DEBUG) ID number
- bl cte ; (TEST/DEBUG) Trace this
- stw r18,LTR_r1(r20) ; (TEST/DEBUG) Normal savearea
- stw r19,LTR_r2(r20) ; (TEST/DEBUG) next quickfret savearea
- stw r31,LTR_r3(r20) ; (TEST/DEBUG) Current one to toss
-trkill3:
-#endif
+erchkfret: mr. r3,r30 ; Any savearea to quickly release?
+ beq+ ernoqfret ; No quickfrets...
+ lwz r30,SAVprev+4(r30) ; Chain back now
+
+ bl EXT(save_ret_phys) ; Put it on the free list
+ stw r30,quickfret+4(r29) ; Dequeue previous guy (really, it is ok to wait until after the release)
+ b erchkfret ; Try the next one...
-doqfrt: li r0,0 ; Get a constant 0
- lis r26,0x8000 /* Build a bit mask and assume first savearea */
- stw r0,SAVqfret(r31) ; Make sure back chain is unlinked
- lwz r28,SAVflags(r31) ; Get the flags for the old active one
-#if TRCSAVE
- beq- cr5,trkill4 ; (TEST/DEBUG) Do not trace this type
- lwz r14,LOW_ADDR(traceMask-EXT(ExceptionVectorsStart))(br0) ; (TEST/DEBUG) Get the trace mask
- mr. r14,r14 ; (TEST/DEBUG) Is it stopped?
- beq- trkill4 ; (TEST/DEBUG) yes...
- li r0,4 ; (TEST/DEBUG) ID number
- bl cte ; (TEST/DEBUG) Trace this
- stw r18,LTR_r1(r20) ; (TEST/DEBUG) Normal savearea
- stw r19,LTR_r2(r20) ; (TEST/DEBUG) next quickfret savearea
- stw r31,LTR_r3(r20) ; (TEST/DEBUG) Current one to toss
- stw r28,LTR_r4(r20) ; (TEST/DEBUG) Save current flags
-trkill4:
-#endif
- rlwinm r25,r31,21,31,31 /* Get position of savearea in block */
- andis. r28,r28,HIGH_ADDR(SAVinuse) /* See if we need to free it */
- srw r26,r26,r25 /* Get bit position to deallocate */
- rlwinm r29,r31,0,0,19 /* Round savearea pointer to even page address */
-
- bne- fretagain /* Still in use, we can't free this one... */
-
- lwz r23,SACalloc(r29) /* Get the allocation for this block */
- lwz r24,SVinuse(r30) /* Get the in use count */
- mr r28,r23 ; (TEST/DEBUG) save for trace
- or r23,r23,r26 /* Turn on our bit */
- subi r24,r24,1 /* Show that this one is free */
- cmplw r23,r26 /* Is our's the only one free? */
- stw r23,SACalloc(r29) /* Save it out */
- bne+ rstrest /* Nope, then the block is already on the free list */
-
- lwz r22,SVfree(r30) /* Get the old head of the free list */
- stw r29,SVfree(r30) /* Point the head at us now */
- stw r22,SACnext(r29) ; Point us to the old last
-
-rstrest: stw r24,SVinuse(r30) /* Set the in use count */
-#if TRCSAVE
- beq- cr5,trkill5 ; (TEST/DEBUG) Do not trace this type
- lwz r14,LOW_ADDR(traceMask-EXT(ExceptionVectorsStart))(br0) ; (TEST/DEBUG) Get the trace mask
- mr. r14,r14 ; (TEST/DEBUG) Is it stopped?
- beq- trkill5 ; (TEST/DEBUG) yes...
- li r0,5 ; (TEST/DEBUG) ID number
- bl cte ; (TEST/DEBUG) Trace this
- stw r18,LTR_r1(r20) ; (TEST/DEBUG) Normal savearea
- stw r19,LTR_r2(r20) ; (TEST/DEBUG) Next quickfret savearea
- stw r31,LTR_r3(r20) ; (TEST/DEBUG) Current one to toss
- stw r28,LTR_srr1(r20) ; (TEST/DEBUG) Save the original allocation
- stw r23,LTR_dar(r20) ; (TEST/DEBUG) Save the new allocation
- stw r24,LTR_save(r20) ; (TEST/DEBUG) Save the new in use count
- stw r22,LTR_lr(r20) ; (TEST/DEBUG) Save the old top of free list
- stw r29,LTR_ctr(r20) ; (TEST/DEBUG) Save the new top of free list
-trkill5:
+ .align 5
+
+ernoqfret:
+#if INSTRUMENT
+ mfspr r30,pmc1 ; INSTRUMENT - saveinstr[5] - Take stamp at saveareas released
+ stw r30,0x6100+(5*16)+0x0(0) ; INSTRUMENT - Save it
+ mfspr r30,pmc2 ; INSTRUMENT - Get stamp
+ stw r30,0x6100+(5*16)+0x4(0) ; INSTRUMENT - Save it
+ mfspr r30,pmc3 ; INSTRUMENT - Get stamp
+ stw r30,0x6100+(5*16)+0x8(0) ; INSTRUMENT - Save it
+ mfspr r30,pmc4 ; INSTRUMENT - Get stamp
+ stw r30,0x6100+(5*16)+0xC(0) ; INSTRUMENT - Save it
#endif
- b fretagain ; Go finish up the rest...
+ dcbt 0,r21 ; Touch in the first thing we need
+
;
-; Build the SR values depending upon destination. If we are going to the kernel,
-; the SRs are almost all the way set up. SR14 (or the currently used copyin/out register)
-; must be set to whatever it was at the last exception because it varies. All the rest
-; have been set up already.
+; Here we release the savearea.
+;
+; Important!!!! The savearea is released before we are done with it. When the
+; local free savearea list (anchored at lclfree) gets too long, save_ret_phys
+; will trim the list, making the extra saveareas allocatable by another processor
+; The code in there must ALWAYS leave our savearea on the local list, otherwise
+; we could be very, very unhappy. The code there always queues the "just released"
+; savearea to the head of the local list. Then, if it needs to trim, it will
+; start with the SECOND savearea, leaving ours intact.
;
-; If we are going into user space, we need to check a bit more. SR0, SR1, SR2, and
-; SR14 (current implementation) must be restored always. The others must be set if
-; they are different that what was loaded last time (i.e., tasks have switched).
-; We check the last loaded address space ID and if the same, we skip the loads.
-; This is a performance gain because SR manipulations are slow.
;
- .align 5
+ mr r3,r31 ; Get the exiting savearea in parm register
+ bl EXT(save_ret_phys) ; Put it on the free list
+#if INSTRUMENT
+ mfspr r3,pmc1 ; INSTRUMENT - saveinstr[6] - Take stamp afer savearea released
+ stw r3,0x6100+(6*16)+0x0(0) ; INSTRUMENT - Save it
+ mfspr r3,pmc2 ; INSTRUMENT - Get stamp
+ stw r3,0x6100+(6*16)+0x4(0) ; INSTRUMENT - Save it
+ mfspr r3,pmc3 ; INSTRUMENT - Get stamp
+ stw r3,0x6100+(6*16)+0x8(0) ; INSTRUMENT - Save it
+ mfspr r3,pmc4 ; INSTRUMENT - Get stamp
+ stw r3,0x6100+(6*16)+0xC(0) ; INSTRUMENT - Save it
+#endif
+
+ lwz r3,savesrr1+4(r31) ; Pass in the MSR we are going to
+ bl EXT(switchSegs) ; Go handle the segment registers/STB
+#if INSTRUMENT
+ mfspr r30,pmc1 ; INSTRUMENT - saveinstr[10] - Take stamp afer switchsegs
+ stw r30,0x6100+(10*16)+0x0(0) ; INSTRUMENT - Save it
+ mfspr r30,pmc2 ; INSTRUMENT - Get stamp
+ stw r30,0x6100+(10*16)+0x4(0) ; INSTRUMENT - Save it
+ mfspr r30,pmc3 ; INSTRUMENT - Get stamp
+ stw r30,0x6100+(10*16)+0x8(0) ; INSTRUMENT - Save it
+ mfspr r30,pmc4 ; INSTRUMENT - Get stamp
+ stw r30,0x6100+(10*16)+0xC(0) ; INSTRUMENT - Save it
+#endif
+ li r3,savesrr1+4 ; Get offset to the srr1 value
+
+ lhz r9,PP_CPU_FLAGS(r29) ; Get the processor flags
+ lwarx r26,r3,r31 ; Get destination MSR and take reservation along the way (just so we can blow it away)
+
+ rlwinm r25,r26,27,22,22 ; Move PR bit to BE
-donefret: lwz r26,savesrr1(r31) ; Get destination state flags
- lwz r7,PP_USERPMAP(r2) ; Pick up the user pmap we may launch
cmplw cr3,r14,r14 ; Set that we do not need to stop streams
- rlwinm. r17,r26,0,MSR_PR_BIT,MSR_PR_BIT ; See if we are going to user or system
- li r14,PMAP_SEGS ; Point to segments
- bne+ gotouser ; We are going into user state...
- lwz r14,savesr14(r31) ; Get the copyin/out register at interrupt time
- mtsr sr14,r14 ; Set SR14
- b segsdone ; We are all set up now...
+ rlwinm r9,r9,(((31-MSR_BE_BIT)+(traceBEb+16+1))&31),MSR_BE_BIT,MSR_BE_BIT ; Set BE bit if special trace is on
+ li r21,emfp0 ; Point to the fp savearea
+ and r9,r9,r25 ; Clear BE if supervisor state
+ or r26,r26,r9 ; Flip on the BE bit for special trace if needed
+ stwcx. r26,r3,r31 ; Blow away any reservations we hold (and set BE)
+
+ lwz r25,savesrr0+4(r31) ; Get the SRR0 to use
+
+ la r28,saver4(r31) ; Point to the 32-byte line with r4-r7
+ dcbz r21,r29 ; Clear a work area
+ lwz r0,saver0+4(r31) ; Restore R0
+ dcbt 0,r28 ; Touch in r4-r7
+ lwz r1,saver1+4(r31) ; Restore R1
+ lwz r2,saver2+4(r31) ; Restore R2
+ la r28,saver8(r31) ; Point to the 32-byte line with r8-r11
+ lwz r3,saver3+4(r31) ; Restore R3
+ andis. r6,r27,hi16(pfAltivec) ; Do we have altivec on the machine?
+ dcbt 0,r28 ; touch in r8-r11
+ lwz r4,saver4+4(r31) ; Restore R4
+ la r28,saver12(r31) ; Point to the 32-byte line with r12-r15
+ mtsrr0 r25 ; Restore the SRR0 now
+ lwz r5,saver5+4(r31) ; Restore R5
+ mtsrr1 r26 ; Restore the SRR1 now
+ lwz r6,saver6+4(r31) ; Restore R6
+
+ dcbt 0,r28 ; touch in r12-r15
+ la r28,saver16(r31)
+
+ lwz r7,saver7+4(r31) ; Restore R7
+ lwz r8,saver8+4(r31) ; Restore R8
+ lwz r9,saver9+4(r31) ; Restore R9
+
+ dcbt 0,r28 ; touch in r16-r19
+ la r28,saver20(r31)
+
+ lwz r10,saver10+4(r31) ; Restore R10
+ lwz r11,saver11+4(r31) ; Restore R11
+
+ dcbt 0,r28 ; touch in r20-r23
+ la r28,savevscr(r31) ; Point to the status area
+
+ lwz r12,saver12+4(r31) ; Restore R12
+ lwz r13,saver13+4(r31) ; Restore R13
+
+ la r14,savectr+4(r31)
+ dcbt 0,r28 ; Touch in VSCR and FPSCR
+ dcbt 0,r14 ; touch in CTR, DAR, DSISR, VRSAVE, and Exception code
+
+ lwz r26,next_savearea+4(r29) ; Get the exception save area
+ la r28,saver24(r31)
+
+ lwz r14,saver14+4(r31) ; Restore R14
+ lwz r15,saver15+4(r31) ; Restore R15
+
+
+ stfd f0,emfp0(r29) ; Save FP0
+ lwz r27,savevrsave(r31) ; Get the vrsave
+ dcbt 0,r28 ; touch in r24-r27
+ la r28,savevscr(r31) ; Point to the status area
+ lfd f0,savefpscrpad(r31) ; Get the fpscr
+ la r22,saver28(r31)
+ mtfsf 0xFF,f0 ; Restore fpscr
+ lfd f0,emfp0(r29) ; Restore the used register
+
+ beq noavec3 ; No Altivec on this CPU...
+
+ stvxl v0,r21,r29 ; Save a vector register
+ lvxl v0,0,r28 ; Get the vector status
+ mtspr vrsave,r27 ; Set the vrsave
+ mtvscr v0 ; Set the vector status
+ lvxl v0,r21,r29 ; Restore work vector register
+
+noavec3: dcbt 0,r22 ; touch in r28-r31
+
+ lwz r23,spcFlags(r29) ; Get the special flags from per_proc
+ la r17,savesrr0(r31)
+ la r26,saver0(r26) ; Point to the first part of the next savearea
+ dcbt 0,r17 ; touch in SRR0, SRR1, CR, XER, LR
+ lhz r28,pfrptdProc(r29) ; Get the reported processor type
+
+ lwz r16,saver16+4(r31) ; Restore R16
+ lwz r17,saver17+4(r31) ; Restore R17
+ lwz r18,saver18+4(r31) ; Restore R18
+ lwz r19,saver19+4(r31) ; Restore R19
+ lwz r20,saver20+4(r31) ; Restore R20
+ lwz r21,saver21+4(r31) ; Restore R21
+ lwz r22,saver22+4(r31) ; Restore R22
+
+ cmpwi cr1,r28,CPU_SUBTYPE_POWERPC_750 ; G3?
+
+ dcbz 0,r26 ; Clear and allocate next savearea we use in the off chance it is still in when we next interrupt
+
+ andis. r23,r23,hi16(perfMonitor) ; Is the performance monitor enabled?
+ lwz r23,saver23+4(r31) ; Restore R23
+ cmpwi cr2,r28,CPU_SUBTYPE_POWERPC_7400 ; Yer standard G4?
+ lwz r24,saver24+4(r31) ; Restore R24
+ lwz r25,saver25+4(r31) ; Restore R25
+ lwz r26,saver26+4(r31) ; Restore R26
+ lwz r27,saver27+4(r31) ; Restore R27
+
+ beq+ noPerfMonRestore32 ; No perf monitor...
+
+ beq- cr1,perfMonRestore32_750 ; This is a G3...
+ beq- cr2,perfMonRestore32_7400 ; Standard G4...
- .align 5
+ lwz r28,savepmc+16(r31)
+ lwz r29,savepmc+20(r31)
+ mtspr pmc5,r28 ; Restore PMC5
+ mtspr pmc6,r29 ; Restore PMC6
+
+perfMonRestore32_7400:
+ lwz r28,savemmcr2+4(r31)
+ mtspr mmcr2,r28 ; Restore MMCR2
+
+perfMonRestore32_750:
+ lwz r28,savepmc+0(r31)
+ lwz r29,savepmc+4(r31)
+ mtspr pmc1,r28 ; Restore PMC1
+ mtspr pmc2,r29 ; Restore PMC2
+ lwz r28,savepmc+8(r31)
+ lwz r29,savepmc+12(r31)
+ mtspr pmc3,r28 ; Restore PMC3
+ mtspr pmc4,r29 ; Restore PMC4
+ lwz r28,savemmcr1+4(r31)
+ lwz r29,savemmcr0+4(r31)
+ mtspr mmcr1,r28 ; Restore MMCR1
+ mtspr mmcr0,r29 ; Restore MMCR0
+
+noPerfMonRestore32:
+ lwz r28,savecr(r31) ; Get CR to restore
+ lwz r29,savexer+4(r31) ; Get XER to restore
+ mtcr r28 ; Restore the CR
+ lwz r28,savelr+4(r31) ; Get LR to restore
+ mtxer r29 ; Restore the XER
+ lwz r29,savectr+4(r31) ; Get the CTR to restore
+ mtlr r28 ; Restore the LR
+ lwz r28,saver30+4(r31) ; Get R30
+ mtctr r29 ; Restore the CTR
+ lwz r29,saver31+4(r31) ; Get R31
+ mtsprg 2,r28 ; Save R30 for later
+ lwz r28,saver28+4(r31) ; Restore R28
+ mtsprg 3,r29 ; Save R31 for later
+ lwz r29,saver29+4(r31) ; Restore R29
-gotouser: dcbt r14,r7 ; Touch the segment register contents
- lwz r16,PP_LASTPMAP(r7) ; Pick up the last loaded pmap
- addi r14,r14,32 ; Second half of pmap segments
- lwz r13,PMAP_VFLAGS(r7) ; Get the flags
- lwz r15,PMAP_SPACE(r7) ; Get the primary space
- dcbt r14,r7 ; Touch second page
- mtcrf 0x0F,r13 ; Set CRs to correspond to the subordinate spaces
- oris r15,r15,hi16(SEG_REG_PROT) ; Set segment 0 SR value
- lhz r9,PP_CPU_FLAGS(r2) ; Get the processor flags
-
- addis r13,r15,0x0000 ; Get SR0 value
- bf 16,nlsr0 ; No alternate here...
- lwz r13,PMAP_SEGS+(0*4)(r7) ; Get SR0 value
-
-nlsr0: mtsr sr0,r13 ; Load up the SR
- rlwinm r9,r9,(((31-MSR_BE_BIT)+(traceBEb+16+1))&31),MSR_BE_BIT,MSR_BE_BIT ; Set BE bit if special trace is on
+ mfsprg r31,0 ; Get per_proc
+ mfsprg r30,2 ; Restore R30
+ lwz r31,pfAvailable(r31) ; Get the feature flags
+ mtsprg 2,r31 ; Set the feature flags
+ mfsprg r31,3 ; Restore R31
- addis r13,r15,0x0010 ; Get SR1 value
- bf 17,nlsr1 ; No alternate here...
- lwz r13,PMAP_SEGS+(1*4)(r7) ; Get SR1 value
-
-nlsr1: mtsr sr1,r13 ; Load up the SR
- or r26,r26,r9 ; Flip on the BE bit for special trace if needed
+ rfi ; Click heels three times and think very hard that there is no place like home...
- cmplw cr3,r7,r16 ; Are we running the same segs as last time?
+ .long 0 ; Leave this here
+ .long 0
+ .long 0
+ .long 0
+ .long 0
+ .long 0
+ .long 0
+ .long 0
- addis r13,r15,0x0020 ; Get SR2 value
- bf 18,nlsr2 ; No alternate here...
- lwz r13,PMAP_SEGS+(2*4)(r7) ; Get SR2 value
-
-nlsr2: mtsr sr2,r13 ; Load up the SR
- addis r13,r15,0x0030 ; Get SR3 value
- bf 19,nlsr3 ; No alternate here...
- lwz r13,PMAP_SEGS+(3*4)(r7) ; Get SR3 value
-
-nlsr3: mtsr sr3,r13 ; Load up the SR
+;
+; This starts the 64-bit version
+;
- addis r13,r15,0x00E0 ; Get SR14 value
- bf 30,nlsr14 ; No alternate here...
- lwz r13,PMAP_SEGS+(14*4)(r7) ; Get SR14 value
-
-nlsr14: mtsr sr14,r13 ; Load up the SR
+ .align 7
- beq+ segsdone ; All done if same pmap as last time...
-
- addis r13,r15,0x0040 ; Get SR4 value
- bf 20,nlsr4 ; No alternate here...
- lwz r13,PMAP_SEGS+(4*4)(r7) ; Get SR4 value
-
-nlsr4: mtsr sr4,r13 ; Load up the SR
+eat64a: ld r30,quickfret(r29) ; Pick up the quick fret list, if any
- addis r13,r15,0x0050 ; Get SR5 value
- bf 21,nlsr5 ; No alternate here...
- lwz r13,PMAP_SEGS+(5*4)(r7) ; Get SR5 value
+ mr. r3,r3 ; Should we hold off the quick release?
+ la r21,saver0(r31) ; Point to the first thing we restore
+ bne-- ernoqfre64 ; Hold off set, do not release just now...
-nlsr5: mtsr sr5,r13 ; Load up the SR
-
- addis r13,r15,0x0060 ; Get SR6 value
- bf 22,nlsr6 ; No alternate here...
- lwz r13,PMAP_SEGS+(6*4)(r7) ; Get SR6 value
+erchkfre64: mr. r3,r30 ; Any savearea to quickly release?
+ beq+ ernoqfre64 ; No quickfrets...
+ ld r30,SAVprev(r30) ; Chain back now
-nlsr6: mtsr sr6,r13 ; Load up the SR
+ bl EXT(save_ret_phys) ; Put it on the free list
- addis r13,r15,0x0070 ; Get SR7 value
- bf 23,nlsr7 ; No alternate here...
- lwz r13,PMAP_SEGS+(7*4)(r7) ; Get SR7 value
-
-nlsr7: mtsr sr7,r13 ; Load up the SR
+ std r30,quickfret(r29) ; Dequeue previous guy (really, it is ok to wait until after the release)
+ b erchkfre64 ; Try the next one...
- addis r13,r15,0x0080 ; Get SR8 value
- bf 24,nlsr8 ; No alternate here...
- lwz r13,PMAP_SEGS+(8*4)(r7) ; Get SR8 value
+ .align 7
-nlsr8: mtsr sr8,r13 ; Load up the SR
-
- addis r13,r15,0x0090 ; Get SR9 value
- bf 25,nlsr9 ; No alternate here...
- lwz r13,PMAP_SEGS+(9*4)(r7) ; Get SR9 value
+ernoqfre64: dcbt 0,r21 ; Touch in the first thing we need
-nlsr9: mtsr sr9,r13 ; Load up the SR
+;
+; Here we release the savearea.
+;
+; Important!!!! The savearea is released before we are done with it. When the
+; local free savearea list (anchored at lclfree) gets too long, save_ret_phys
+; will trim the list, making the extra saveareas allocatable by another processor
+; The code in there must ALWAYS leave our savearea on the local list, otherwise
+; we could be very, very unhappy. The code there always queues the "just released"
+; savearea to the head of the local list. Then, if it needs to trim, it will
+; start with the SECOND savearea, leaving ours intact.
+;
+;
- addis r13,r15,0x00A0 ; Get SR10 value
- bf 26,nlsr10 ; No alternate here...
- lwz r13,PMAP_SEGS+(10*4)(r7) ; Get SR10 value
+ li r3,lgKillResv ; Get spot to kill reservation
+ stdcx. r3,0,r3 ; Blow away any reservations we hold
-nlsr10: mtsr sr10,r13 ; Load up the SR
+ mr r3,r31 ; Get the exiting savearea in parm register
+ bl EXT(save_ret_phys) ; Put it on the free list
- addis r13,r15,0x00B0 ; Get SR11 value
- bf 27,nlsr11 ; No alternate here...
- lwz r13,PMAP_SEGS+(11*4)(r7) ; Get SR11 value
-
-nlsr11: mtsr sr11,r13 ; Load up the SR
+ lwz r3,savesrr1+4(r31) ; Pass in the MSR we will be going to
+ bl EXT(switchSegs) ; Go handle the segment registers/STB
- addis r13,r15,0x00C0 ; Get SR12 value
- bf 28,nlsr12 ; No alternate here...
- lwz r13,PMAP_SEGS+(12*4)(r7) ; Get SR12 value
-
-nlsr12: mtsr sr12,r13 ; Load up the SR
+ lhz r9,PP_CPU_FLAGS(r29) ; Get the processor flags
+ ld r26,savesrr1(r31) ; Get destination MSR
+ cmplw cr3,r14,r14 ; Set that we do not need to stop streams
+ rlwinm r25,r26,27,22,22 ; Move PR bit to BE
- addis r13,r15,0x00D0 ; Get SR13 value
- bf 29,nlsr13 ; No alternate here...
- lwz r13,PMAP_SEGS+(13*4)(r7) ; Get SR13 value
-
-nlsr13: mtsr sr13,r13 ; Load up the SR
+ rlwinm r9,r9,(((31-MSR_BE_BIT)+(traceBEb+16+1))&31),MSR_BE_BIT,MSR_BE_BIT ; Set BE bit if special trace is on
+ li r21,emfp0 ; Point to a workarea
+ and r9,r9,r25 ; Clear BE if supervisor state
+ or r26,r26,r9 ; Flip on the BE bit for special trace if needed
- addis r13,r15,0x00F0 ; Get SR15 value
- bf 31,nlsr15 ; No alternate here...
- lwz r13,PMAP_SEGS+(15*4)(r7) ; Get SR15 value
-
-nlsr15: mtsr sr15,r13 ; Load up the SR
-
-segsdone: li r1,emfp0 ; Point to the fp savearea
- lwz r25,savesrr0(r31) ; Get the SRR0 to use
- la r28,saver6(r31) /* Point to the next line to use */
- dcbt r1,r2 ; Start moving in a work area
- lwz r0,saver0(r31) /* Restore */
- dcbt 0,r28 /* Touch it in */
- mr r29,r2 ; Save the per_proc
- lwz r1,saver1(r31) /* Restore */
- lwz r2,saver2(r31) /* Restore */
- la r28,saver14(r31) /* Point to the next line to get */
- lwz r3,saver3(r31) /* Restore */
+ ld r25,savesrr0(r31) ; Get the SRR0 to use
+ la r28,saver16(r31) ; Point to the 128-byte line with r16-r31
+ dcbz128 r21,r29 ; Clear a work area
+ ld r0,saver0(r31) ; Restore R0
+ dcbt 0,r28 ; Touch in r16-r31
+ ld r1,saver1(r31) ; Restore R1
+ ld r2,saver2(r31) ; Restore R2
+ ld r3,saver3(r31) ; Restore R3
mtcrf 0x80,r27 ; Get facility availability flags (do not touch CR1-7)
- lwz r4,saver4(r31) /* Restore */
- mtsrr0 r25 /* Restore the SRR0 now */
- lwz r5,saver5(r31) /* Restore */
- mtsrr1 r26 /* Restore the SRR1 now */
- lwz r6,saver6(r31) /* Restore */
-
- dcbt 0,r28 /* Touch that next line on in */
- la r28,savexfpscrpad(r31) ; Point to the saved fpscr
-
- lwz r7,saver7(r31) /* Restore */
- dcbt 0,r28 ; Touch saved fpscr
- lwz r8,saver8(r31) /* Restore */
- lwz r9,saver9(r31) /* Restore */
- lwz r10,saver10(r31) /* Restore */
- lwz r11,saver11(r31) /* Restore */
- lwz r12,saver12(r31) /* Restore */
- lwz r13,saver13(r31) /* Restore */
- la r28,saver22(r31) /* Point to the next line to do */
- lwz r14,saver14(r31) /* Restore */
- lwz r15,saver15(r31) /* Restore */
-
-;
-; Note that floating point will be enabled from here on until the RFI
-;
-
- bf- pfFloatb,nofphere ; Skip if no floating point...
- mfmsr r27 ; Save the MSR
- ori r27,r27,lo16(MASK(MSR_FP)) ; Enable floating point
- mtmsr r27 ; Really enable
- isync
+ ld r4,saver4(r31) ; Restore R4
+ mtsrr0 r25 ; Restore the SRR0 now
+ ld r5,saver5(r31) ; Restore R5
+ mtsrr1 r26 ; Restore the SRR1 now
+ ld r6,saver6(r31) ; Restore R6
+
+ ld r7,saver7(r31) ; Restore R7
+ ld r8,saver8(r31) ; Restore R8
+ ld r9,saver9(r31) ; Restore R9
+
+ la r28,savevscr(r31) ; Point to the status area
+
+ ld r10,saver10(r31) ; Restore R10
+ ld r11,saver11(r31) ; Restore R11
+ ld r12,saver12(r31) ; Restore R12
+ ld r13,saver13(r31) ; Restore R13
+
+ ld r26,next_savearea(r29) ; Get the exception save area
+
+ ld r14,saver14(r31) ; Restore R14
+ ld r15,saver15(r31) ; Restore R15
+ lwz r27,savevrsave(r31) ; Get the vrsave
+
+ bf-- pfAltivecb,noavec2s ; Skip if no VMX...
+
+ stvxl v0,r21,r29 ; Save a vector register
+ lvxl v0,0,r28 ; Get the vector status
+ mtvscr v0 ; Set the vector status
+
+ lvxl v0,r21,r29 ; Restore work vector register
+
+noavec2s: mtspr vrsave,r27 ; Set the vrsave
+
+ lwz r28,saveexception(r31) ; Get exception type
stfd f0,emfp0(r29) ; Save FP0
- lfd f0,savexfpscrpad(r31) ; Get the fpscr
+ lfd f0,savefpscrpad(r31) ; Get the fpscr
mtfsf 0xFF,f0 ; Restore fpscr
lfd f0,emfp0(r29) ; Restore the used register
-
-nofphere: dcbt 0,r28 /* Touch in another line of context */
-
- lwz r16,saver16(r31) /* Restore */
- lwz r17,saver17(r31) /* Restore */
- lwz r18,saver18(r31) /* Restore */
- lwz r19,saver19(r31) /* Restore */
- lwz r20,saver20(r31) /* Restore */
- lwz r21,saver21(r31) /* Restore */
- la r28,saver30(r31) /* Point to the final line */
- lwz r22,saver22(r31) /* Restore */
-
- dcbt 0,r28 /* Suck it in */
-
- lwz r23,saver23(r31) /* Restore */
- lwz r24,saver24(r31) /* Restore */
- lwz r25,saver25(r31) /* Restore */
- lwz r26,saver26(r31) /* Restore */
- lwz r27,saver27(r31) /* Restore */
-
- lwz r28,savecr(r31) /* Get CR to restore */
- bf pfAltivecb,noavec4 ; No vector on this machine
- lwz r29,savevrsave(r31) ; Get the vrsave
- beq+ cr3,noavec3 ; SRs have not changed, no need to stop the streams...
- dssall ; Kill all data streams
- ; The streams should be suspended
- ; already, and we do a bunch of
- ; dependent loads and a sync later
- ; so we should be cool.
-
-noavec3: mtspr vrsave,r29 ; Set the vrsave
-
-noavec4: lwz r29,savexer(r31) /* Get XER to restore */
- mtcr r28 /* Restore the CR */
- lwz r28,savelr(r31) /* Get LR to restore */
- mtxer r29 /* Restore the XER */
- lwz r29,savectr(r31) /* Get the CTR to restore */
- mtlr r28 /* Restore the LR */
- lwz r28,saver30(r31) /* Restore */
- mtctr r29 /* Restore the CTR */
- lwz r29,saver31(r31) /* Restore */
- mtsprg 2,r28 /* Save R30 */
- lwz r28,saver28(r31) /* Restore */
- mtsprg 3,r29 /* Save R31 */
- lwz r29,saver29(r31) /* Restore */
-
-#if PERFTIMES && DEBUG
- stmw r1,0x280(br0) ; Save all registers
- mfcr r20 ; Save the CR
- mflr r21 ; Save the LR
- mfsrr0 r9 ; Save SRR0
- mfsrr1 r11 ; Save SRR1
- mr r8,r0 ; Save R0
- li r3,69 ; Indicate interrupt
- mr r4,r11 ; Set MSR to log
- mr r5,r31 ; Get savearea to log
- bl EXT(dbgLog2) ; Cut log entry
- mr r0,r8 ; Restore R0
- mtsrr0 r9 ; Restore SRR0
- mtsrr1 r11 ; Restore SRR1
- mtlr r21 ; Restore the LR
- mtcr r20 ; Restore the CR
- lmw r1,0x280(br0) ; Restore all the rest
-#endif
-
- li r31,0 /* Get set to clear lock */
- sync /* Make sure it's all out there */
- stw r31,SVlock(r30) /* Unlock it */
- mfsprg r30,2 /* Restore R30 */
- mfsprg r31,0 ; Get per_proc
- lwz r31,pfAvailable(r31) ; Get the feature flags
+ ld r16,saver16(r31) ; Restore R16
+ lwz r30,spcFlags(r29) ; Get the special flags from per_proc
+ ld r17,saver17(r31) ; Restore R17
+ ld r18,saver18(r31) ; Restore R18
+ cmplwi cr1,r28,T_RESET ; Are we returning from a reset?
+ ld r19,saver19(r31) ; Restore R19
+ ld r20,saver20(r31) ; Restore R20
+ li r27,0 ; Get a zero
+ ld r21,saver21(r31) ; Restore R21
+ la r26,saver0(r26) ; Point to the first part of the next savearea
+ andis. r30,r30,hi16(perfMonitor) ; Is the performance monitor enabled?
+ ld r22,saver22(r31) ; Restore R22
+ ld r23,saver23(r31) ; Restore R23
+ bne++ cr1,er64rrst ; We are not returning from a reset...
+ stw r27,lo16(EXT(ResetHandler)-EXT(ExceptionVectorsStart)+RESETHANDLER_TYPE)(br0) ; Allow resets again
+
+er64rrst: ld r24,saver24(r31) ; Restore R24
+
+ dcbz128 0,r26 ; Clear and allocate next savearea we use in the off chance it is still in when we next interrupt
+
+ ld r25,saver25(r31) ; Restore R25
+ ld r26,saver26(r31) ; Restore R26
+ ld r27,saver27(r31) ; Restore R27
+
+ beq++ noPerfMonRestore64 ; Nope...
+
+ lwz r28,savepmc+0(r31)
+ lwz r29,savepmc+4(r31)
+ mtspr pmc1_gp,r28 ; Restore PMC1
+ mtspr pmc2_gp,r29 ; Restore PMC2
+ lwz r28,savepmc+8(r31)
+ lwz r29,savepmc+12(r31)
+ mtspr pmc3_gp,r28 ; Restore PMC3
+ mtspr pmc4_gp,r29 ; Restore PMC4
+ lwz r28,savepmc+16(r31)
+ lwz r29,savepmc+20(r31)
+ mtspr pmc5_gp,r28 ; Restore PMC5
+ mtspr pmc6_gp,r29 ; Restore PMC6
+ lwz r28,savepmc+24(r31)
+ lwz r29,savepmc+28(r31)
+ mtspr pmc7_gp,r28 ; Restore PMC7
+ mtspr pmc8_gp,r29 ; Restore PMC8
+ ld r28,savemmcr1(r31)
+ ld r29,savemmcr2(r31)
+ mtspr mmcr1_gp,r28 ; Restore MMCR1
+ mtspr mmcra_gp,r29 ; Restore MMCRA
+ ld r28,savemmcr0(r31)
+
+ mtspr mmcr0_gp,r28 ; Restore MMCR0
+
+noPerfMonRestore64:
+ mfsprg r30,0 ; Get per_proc
+ lwz r28,savecr(r31) ; Get CR to restore
+ ld r29,savexer(r31) ; Get XER to restore
+ mtcr r28 ; Restore the CR
+ ld r28,savelr(r31) ; Get LR to restore
+ mtxer r29 ; Restore the XER
+ ld r29,savectr(r31) ; Get the CTR to restore
+ mtlr r28 ; Restore the LR
+ ld r28,saver30(r31) ; Get R30
+ mtctr r29 ; Restore the CTR
+ ld r29,saver31(r31) ; Get R31
+ mtspr hsprg0,r28 ; Save R30 for later
+ ld r28,saver28(r31) ; Restore R28
+ mtsprg 3,r29 ; Save R31 for later
+ ld r29,saver29(r31) ; Restore R29
+
+ lwz r31,pfAvailable(r30) ; Get the feature flags
+ ld r30,UAW(r30) ; Get the User Assist DoubleWord
mtsprg 2,r31 ; Set the feature flags
- mfsprg r31,3 /* Restore R31 */
-
- rfi /* Click heels three times and think very hard that there's no place like home */
-
- .long 0 /* For old 601 bug */
- .long 0
- .long 0
- .long 0
- .long 0
- .long 0
- .long 0
- .long 0
+ mfsprg r31,3 ; Restore R31
+ mtsprg 3,r30 ; Set the UAW
+ mfspr r30,hsprg0 ; Restore R30
+ rfid ; Click heels three times and think very hard that there is no place like home...
*
*
* ENTRY : IR and/or DR and/or interruptions can be on
- * R3 points to the physical address of a savearea
+ * R3 points to the virtual address of a savearea
*/
.align 5
LEXT(exception_exit)
mfsprg r29,2 ; Get feature flags
- mfmsr r30 /* Get the current MSR */
+ mr r31,r3 ; Get the savearea in the right register
mtcrf 0x04,r29 ; Set the features
- mr r31,r3 /* Get the savearea in the right register */
- andi. r30,r30,0x7FCF /* Turn off externals, IR, and DR */
+ li r0,1 ; Get this just in case
+ mtcrf 0x02,r29 ; Set the features
+ lis r30,hi16(MASK(MSR_VEC)|MASK(MSR_FP)|MASK(MSR_ME)) ; Set up the MSR we will use throughout. Note that ME come on here if MCK
+ rlwinm r4,r3,0,0,19 ; Round down to savearea block base
lis r1,hi16(SAVredrive) ; Get redrive request
-
+ mfsprg r2,0 ; Get the per_proc block
+ ori r30,r30,lo16(MASK(MSR_VEC)|MASK(MSR_FP)|MASK(MSR_ME)) ; Rest of MSR
+ bt++ pf64Bitb,eeSixtyFour ; We are 64-bit...
+
+ lwz r4,SACvrswap+4(r4) ; Get the virtual to real translation
+
bt pfNoMSRirb,eeNoMSR ; No MSR...
mtmsr r30 ; Translation and all off
isync ; Toss prefetch
b eeNoMSRx
+ .align 5
+
+eeSixtyFour:
+ ld r4,SACvrswap(r4) ; Get the virtual to real translation
+ rldimi r30,r0,63,MSR_SF_BIT ; Set SF bit (bit 0)
+ mtmsrd r30 ; Set 64-bit mode, turn off EE, DR, and IR
+ isync ; Toss prefetch
+ b eeNoMSRx
+
+ .align 5
+
eeNoMSR: li r0,loadMSR ; Get the MSR setter SC
mr r3,r30 ; Get new MSR
sc ; Set it
-eeNoMSRx:
- mfsprg r2,0 ; Get the per_proc block
+eeNoMSRx: xor r31,r31,r4 ; Convert the savearea to physical addressing
lwz r4,SAVflags(r31) ; Pick up the flags
mr r13,r31 ; Put savearea here also
+#if INSTRUMENT
+ mfspr r5,pmc1 ; INSTRUMENT - saveinstr[8] - stamp exception exit
+ stw r5,0x6100+(8*16)+0x0(0) ; INSTRUMENT - Save it
+ mfspr r5,pmc2 ; INSTRUMENT - Get stamp
+ stw r5,0x6100+(8*16)+0x4(0) ; INSTRUMENT - Save it
+ mfspr r5,pmc3 ; INSTRUMENT - Get stamp
+ stw r5,0x6100+(8*16)+0x8(0) ; INSTRUMENT - Save it
+ mfspr r5,pmc4 ; INSTRUMENT - Get stamp
+ stw r5,0x6100+(8*16)+0xC(0) ; INSTRUMENT - Save it
+#endif
+
+
and. r0,r4,r1 ; Check if redrive requested
- andc r4,r4,r1 ; Clear redrive
dcbt br0,r2 ; We will need this in just a sec
beq+ EatRupt ; No redrive, just exit...
- lwz r3,saveexception(r13) ; Restore exception code
- stw r4,SAVflags(r13) ; Set the flags
+0: mftbu r2 ; Avoid using an obsolete timestamp for the redrive
+ mftb r4
+ mftbu r0
+ cmplw r0,r2
+ bne-- 0b
+
+ stw r2,SAVtime(r13)
+ stw r4,SAVtime+4(r13)
+
+ lwz r11,saveexception(r13) ; Restore exception code
b Redrive ; Redrive the exception...
+
+
-;
-; Make trace entry for lowmem_vectors internal debug
-;
-#if TRCSAVE
-cte:
- lwz r20,LOW_ADDR(EXT(traceCurr)-EXT(ExceptionVectorsStart))(br0) ; Pick up the current trace entry
- lwz r16,LOW_ADDR(EXT(traceEnd)-EXT(ExceptionVectorsStart))(br0) ; Grab up the end of it all
- addi r17,r20,LTR_size ; Point to the next trace entry
- cmplw r17,r16 ; Do we need to wrap the trace table?
- li r15,32 ; Second line of entry
- bne+ ctenwrap ; We got a trace entry...
- lwz r17,LOW_ADDR(EXT(traceStart)-EXT(ExceptionVectorsStart))(br0) ; Wrap back to the top
-
-ctenwrap: stw r17,LOW_ADDR(EXT(traceCurr)-EXT(ExceptionVectorsStart))(br0) ; Set the next entry for the next guy
-
- bf- featL1ena,skipz8 ; L1 cache is disabled...
- dcbz 0,r20 ; Allocate cache for the entry
- dcbz r15,r20 ; Zap the second half
-skipz8:
-
-ctegetTB: mftbu r16 ; Get the upper timebase
- mftb r17 ; Get the lower timebase
- mftbu r15 ; Get the upper one again
- cmplw r16,r15 ; Did the top tick?
- bne- ctegetTB ; Yeah, need to get it again...
-
- li r15,0x111 ; Get the special trace ID code
- stw r0,LTR_r0(r20) ; Save R0 (usually used as an ID number
- stw r16,LTR_timeHi(r20) ; Set the upper part of TB
- mflr r16 ; Get the return point
- stw r17,LTR_timeLo(r20) ; Set the lower part of TB
- sth r15,LTR_excpt(r20) ; Save the exception type
- stw r16,LTR_srr0(r20) ; Save the return point
- blr ; Leave...
-#endif
+ .align 12 ; Force page alignment
-/*
- * Start of the trace table
- */
-
- .align 12 /* Align to 4k boundary */
-
- .globl EXT(traceTableBeg)
-EXT(traceTableBeg): /* Start of trace table */
-/* .fill 2048,4,0 Make an 8k trace table for now */
- .fill 13760,4,0 /* Make an .trace table for now */
-/* .fill 240000,4,0 Make an .trace table for now */
- .globl EXT(traceTableEnd)
-EXT(traceTableEnd): /* End of trace table */
-
.globl EXT(ExceptionVectorsEnd)
EXT(ExceptionVectorsEnd): /* Used if relocating the exception vectors */
-#ifndef HACKALERTHACKALERT
-/*
- * This .long needs to be here because the linker gets confused and tries to
- * include the final label in a section in the next section if there is nothing
- * after it
- */
- .long 0 /* (HACK/HACK/HACK) */
+
+
+
+
+;
+; Here is where we keep the low memory globals
+;
+
+ . = 0x5000
+
+ .ascii "Hagfish " ; 5000 Unique eyecatcher
+ .long 0 ; 5008 Zero
+ .long 0 ; 500C Zero cont...
+ .long EXT(PerProcTable) ; 5010 pointer to per_proc_entry table
+ .long 0 ; 5014 Zero
+
+ .globl EXT(mckFlags)
+EXT(mckFlags):
+ .long 0 ; 5018 Machine check flags
+
+ .long EXT(version) ; 501C Pointer to kernel version string
+ .long 0 ; 5020 physical memory window virtual address
+ .long 0 ; 5024 physical memory window virtual address
+ .long 0 ; 5028 user memory window virtual address
+ .long 0 ; 502C user memory window virtual address
+ .long 0 ; 5030 VMM boot-args forced feature flags
+ .long 0 ; 5034 reserved
+ .long 0 ; 5038 reserved
+ .long 0 ; 503C reserved
+ .long 0 ; 5040 reserved
+ .long 0 ; 5044 reserved
+ .long 0 ; 5048 reserved
+ .long 0 ; 504C reserved
+ .long 0 ; 5050 reserved
+ .long 0 ; 5054 reserved
+ .long 0 ; 5058 reserved
+ .long 0 ; 505C reserved
+ .long 0 ; 5060 reserved
+ .long 0 ; 5064 reserved
+ .long 0 ; 5068 reserved
+ .long 0 ; 506C reserved
+ .long 0 ; 5070 reserved
+ .long 0 ; 5074 reserved
+ .long 0 ; 5078 reserved
+ .long 0 ; 507C reserved
+
+ .globl EXT(trcWork)
+EXT(trcWork):
+ .long 0 ; 5080 The next trace entry to use
+#if DEBUG
+ .long 0xFFFFFFFF ; 5084 All enabled
+#else
+ .long 0x00000000 ; 5084 All disabled on non-debug systems
#endif
+ .long 0 ; 5088 Start of the trace table
+ .long 0 ; 508C End (wrap point) of the trace
+ .long 0 ; 5090 Saved mask while in debugger
+ .long 0 ; 5094 Size of trace table (1 - 256 pages)
+ .long 0 ; 5098 traceGas[0]
+ .long 0 ; 509C traceGas[1]
+
+ .long 0 ; 50A0 reserved
+ .long 0 ; 50A4 reserved
+ .long 0 ; 50A8 reserved
+ .long 0 ; 50AC reserved
+ .long 0 ; 50B0 reserved
+ .long 0 ; 50B4 reserved
+ .long 0 ; 50B8 reserved
+ .long 0 ; 50BC reserved
+ .long 0 ; 50C0 reserved
+ .long 0 ; 50C4 reserved
+ .long 0 ; 50C8 reserved
+ .long 0 ; 50CC reserved
+ .long 0 ; 50D0 reserved
+ .long 0 ; 50D4 reserved
+ .long 0 ; 50D8 reserved
+ .long 0 ; 50DC reserved
+ .long 0 ; 50E0 reserved
+ .long 0 ; 50E4 reserved
+ .long 0 ; 50E8 reserved
+ .long 0 ; 50EC reserved
+ .long 0 ; 50F0 reserved
+ .long 0 ; 50F4 reserved
+ .long 0 ; 50F8 reserved
+ .long 0 ; 50FC reserved
+
+ .globl EXT(saveanchor)
+
+EXT(saveanchor): ; 5100 saveanchor
+ .set .,.+SVsize
+
+ .long 0 ; 5140 reserved
+ .long 0 ; 5144 reserved
+ .long 0 ; 5148 reserved
+ .long 0 ; 514C reserved
+ .long 0 ; 5150 reserved
+ .long 0 ; 5154 reserved
+ .long 0 ; 5158 reserved
+ .long 0 ; 515C reserved
+ .long 0 ; 5160 reserved
+ .long 0 ; 5164 reserved
+ .long 0 ; 5168 reserved
+ .long 0 ; 516C reserved
+ .long 0 ; 5170 reserved
+ .long 0 ; 5174 reserved
+ .long 0 ; 5178 reserved
+ .long 0 ; 517C reserved
+
+ .long 0 ; 5180 tlbieLock
+
+ .long 0 ; 5184 reserved
+ .long 0 ; 5188 reserved
+ .long 0 ; 518C reserved
+ .long 0 ; 5190 reserved
+ .long 0 ; 5194 reserved
+ .long 0 ; 5198 reserved
+ .long 0 ; 519C reserved
+ .long 0 ; 51A0 reserved
+ .long 0 ; 51A4 reserved
+ .long 0 ; 51A8 reserved
+ .long 0 ; 51AC reserved
+ .long 0 ; 51B0 reserved
+ .long 0 ; 51B4 reserved
+ .long 0 ; 51B8 reserved
+ .long 0 ; 51BC reserved
+ .long 0 ; 51C0 reserved
+ .long 0 ; 51C4 reserved
+ .long 0 ; 51C8 reserved
+ .long 0 ; 51CC reserved
+ .long 0 ; 51D0 reserved
+ .long 0 ; 51D4 reserved
+ .long 0 ; 51D8 reserved
+ .long 0 ; 51DC reserved
+ .long 0 ; 51E0 reserved
+ .long 0 ; 51E4 reserved
+ .long 0 ; 51E8 reserved
+ .long 0 ; 51EC reserved
+ .long 0 ; 51F0 reserved
+ .long 0 ; 51F4 reserved
+ .long 0 ; 51F8 reserved
+ .long 0 ; 51FC reserved
+
+ .globl EXT(dgWork)
+
+EXT(dgWork):
+ .long 0 ; 5200 dgLock
+ .long 0 ; 5204 dgFlags
+ .long 0 ; 5208 dgMisc0
+ .long 0 ; 520C dgMisc1
+ .long 0 ; 5210 dgMisc2
+ .long 0 ; 5214 dgMisc3
+ .long 0 ; 5218 dgMisc4
+ .long 0 ; 521C dgMisc5
+
+ .globl EXT(LcksOpts)
+EXT(LcksOpts):
+ .long 0 ; 5220 lcksWork
+ .long 0 ; 5224 reserved
+ .long 0 ; 5228 reserved
+ .long 0 ; 522C reserved
+ .long 0 ; 5230 reserved
+ .long 0 ; 5234 reserved
+ .long 0 ; 5238 reserved
+ .long 0 ; 523C reserved
+ .long 0 ; 5240 reserved
+ .long 0 ; 5244 reserved
+ .long 0 ; 5248 reserved
+ .long 0 ; 524C reserved
+ .long 0 ; 5250 reserved
+ .long 0 ; 5254 reserved
+ .long 0 ; 5258 reserved
+ .long 0 ; 525C reserved
+ .long 0 ; 5260 reserved
+ .long 0 ; 5264 reserved
+ .long 0 ; 5268 reserved
+ .long 0 ; 526C reserved
+ .long 0 ; 5270 reserved
+ .long 0 ; 5274 reserved
+ .long 0 ; 5278 reserved
+ .long 0 ; 527C reserved
+
+ .globl EXT(pPcfg)
+EXT(pPcfg):
+ .long 0x80000000 | (12 << 8) | 12 ; 5280 pcfDefPcfg - 4k
+ .long 0 ; 5284 pcfLargePcfg
+ .long 0 ; 5288 Non-primary page configurations
+ .long 0 ; 528C Non-primary page configurations
+ .long 0 ; 5290 Non-primary page configurations
+ .long 0 ; 5294 Non-primary page configurations
+ .long 0 ; 5298 Non-primary page configurations
+ .long 0 ; 529C Non-primary page configurations
+
+ .long 0 ; 52A0 reserved
+ .long 0 ; 52A4 reserved
+ .long 0 ; 52A8 reserved
+ .long 0 ; 52AC reserved
+ .long 0 ; 52B0 reserved
+ .long 0 ; 52B4 reserved
+ .long 0 ; 52B8 reserved
+ .long 0 ; 52BC reserved
+ .long 0 ; 52C0 reserved
+ .long 0 ; 52C4 reserved
+ .long 0 ; 52C8 reserved
+ .long 0 ; 52CC reserved
+ .long 0 ; 52D0 reserved
+ .long 0 ; 52D4 reserved
+ .long 0 ; 52D8 reserved
+ .long 0 ; 52DC reserved
+ .long 0 ; 52E0 reserved
+ .long 0 ; 52E4 reserved
+ .long 0 ; 52E8 reserved
+ .long 0 ; 52EC reserved
+ .long 0 ; 52F0 reserved
+ .long 0 ; 52F4 reserved
+ .long 0 ; 52F8 reserved
+ .long 0 ; 52FC reserved
+
+ .globl EXT(killresv)
+EXT(killresv):
+
+ .long 0 ; 5300 Used to kill reservations
+ .long 0 ; 5304 Used to kill reservations
+ .long 0 ; 5308 Used to kill reservations
+ .long 0 ; 530C Used to kill reservations
+ .long 0 ; 5310 Used to kill reservations
+ .long 0 ; 5314 Used to kill reservations
+ .long 0 ; 5318 Used to kill reservations
+ .long 0 ; 531C Used to kill reservations
+ .long 0 ; 5320 Used to kill reservations
+ .long 0 ; 5324 Used to kill reservations
+ .long 0 ; 5328 Used to kill reservations
+ .long 0 ; 532C Used to kill reservations
+ .long 0 ; 5330 Used to kill reservations
+ .long 0 ; 5334 Used to kill reservations
+ .long 0 ; 5338 Used to kill reservations
+ .long 0 ; 533C Used to kill reservations
+ .long 0 ; 5340 Used to kill reservations
+ .long 0 ; 5344 Used to kill reservations
+ .long 0 ; 5348 Used to kill reservations
+ .long 0 ; 534C Used to kill reservations
+ .long 0 ; 5350 Used to kill reservations
+ .long 0 ; 5354 Used to kill reservations
+ .long 0 ; 5358 Used to kill reservations
+ .long 0 ; 535C Used to kill reservations
+ .long 0 ; 5360 Used to kill reservations
+ .long 0 ; 5364 Used to kill reservations
+ .long 0 ; 5368 Used to kill reservations
+ .long 0 ; 536C Used to kill reservations
+ .long 0 ; 5370 Used to kill reservations
+ .long 0 ; 5374 Used to kill reservations
+ .long 0 ; 5378 Used to kill reservations
+ .long 0 ; 537C Used to kill reservations
+
+ .long 0 ; 5380 reserved
+ .long 0 ; 5384 reserved
+ .long 0 ; 5388 reserved
+ .long 0 ; 538C reserved
+ .long 0 ; 5390 reserved
+ .long 0 ; 5394 reserved
+ .long 0 ; 5398 reserved
+ .long 0 ; 539C reserved
+ .long 0 ; 53A0 reserved
+ .long 0 ; 53A4 reserved
+ .long 0 ; 53A8 reserved
+ .long 0 ; 53AC reserved
+ .long 0 ; 53B0 reserved
+ .long 0 ; 53B4 reserved
+ .long 0 ; 53B8 reserved
+ .long 0 ; 53BC reserved
+ .long 0 ; 53C0 reserved
+ .long 0 ; 53C4 reserved
+ .long 0 ; 53C8 reserved
+ .long 0 ; 53CC reserved
+ .long 0 ; 53D0 reserved
+ .long 0 ; 53D4 reserved
+ .long 0 ; 53D8 reserved
+ .long 0 ; 53DC reserved
+ .long 0 ; 53E0 reserved
+ .long 0 ; 53E4 reserved
+ .long 0 ; 53E8 reserved
+ .long 0 ; 53EC reserved
+ .long 0 ; 53F0 reserved
+ .long 0 ; 53F4 reserved
+ .long 0 ; 53F8 reserved
+ .long 0 ; 53FC reserved
+ .long 0 ; 5400 reserved
+ .long 0 ; 5404 reserved
+ .long 0 ; 5408 reserved
+ .long 0 ; 540C reserved
+ .long 0 ; 5410 reserved
+ .long 0 ; 5414 reserved
+ .long 0 ; 5418 reserved
+ .long 0 ; 541C reserved
+ .long 0 ; 5420 reserved
+ .long 0 ; 5424 reserved
+ .long 0 ; 5428 reserved
+ .long 0 ; 542C reserved
+ .long 0 ; 5430 reserved
+ .long 0 ; 5434 reserved
+ .long 0 ; 5438 reserved
+ .long 0 ; 543C reserved
+ .long 0 ; 5440 reserved
+ .long 0 ; 5444 reserved
+ .long 0 ; 5448 reserved
+ .long 0 ; 544C reserved
+ .long 0 ; 5450 reserved
+ .long 0 ; 5454 reserved
+ .long 0 ; 5458 reserved
+ .long 0 ; 545C reserved
+ .long 0 ; 5460 reserved
+ .long 0 ; 5464 reserved
+ .long 0 ; 5468 reserved
+ .long 0 ; 546C reserved
+ .long 0 ; 5470 reserved
+ .long 0 ; 5474 reserved
+ .long 0 ; 5478 reserved
+ .long 0 ; 547C reserved
+;
+; The "shared page" is used for low-level debugging
+;
+
+ . = 0x6000
+ .globl EXT(sharedPage)
+
+EXT(sharedPage): ; Per processor data area
+ .long 0xC24BC195 ; Comm Area validity value
+ .long 0x87859393 ; Comm Area validity value
+ .long 0xE681A2C8 ; Comm Area validity value
+ .long 0x8599855A ; Comm Area validity value
+ .long 0xD74BD296 ; Comm Area validity value
+ .long 0x8388E681 ; Comm Area validity value
+ .long 0xA2C88599 ; Comm Area validity value
+ .short 0x855A ; Comm Area validity value
+ .short 1 ; Comm Area version number
+ .fill 1016*4,1,0 ; (filled with 0s)
.data
.align ALIGN
.long EXT(ExceptionVectorsEnd) -EXT(ExceptionVectorsStart) /* phys fn */
+
projects / apple / xnu.git / blobdiff