/*
- * Copyright (c) 2003-2006 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Here's what to do if you want to add a new routine to the comm page:
*
- * 1. Add a definition for it's address in osfmk/i386/cpu_capabilities.h,
+ * 1. Add a definition for it's address in osfmk/ppc/cpu_capabilities.h,
* being careful to reserve room for future expansion.
*
* 2. Write one or more versions of the routine, each with it's own
* commpage_descriptor. The tricky part is getting the "special",
* "musthave", and "canthave" fields right, so that exactly one
* version of the routine is selected for every machine.
- * The source files should be in osfmk/i386/commpage/.
+ * The source files should be in osfmk/ppc/commpage/.
*
* 3. Add a ptr to your new commpage_descriptor(s) in the "routines"
- * array in osfmk/i386/commpage/commpage_asm.s. There are two
- * arrays, one for the 32-bit and one for the 64-bit commpage.
+ * array in commpage_populate(). Of course, you'll also have to
+ * declare them "extern" in commpage_populate().
*
* 4. Write the code in Libc to use the new routine.
*/
#include <mach/machine.h>
#include <mach/vm_map.h>
#include <i386/machine_routines.h>
-#include <i386/misc_protos.h>
#include <machine/cpu_capabilities.h>
#include <machine/commpage.h>
#include <machine/pmap.h>
#include <vm/vm_map.h>
#include <ipc/ipc_port.h>
-#include <kern/page_decrypt.h>
-
-/* the lists of commpage routines are in commpage_asm.s */
-extern commpage_descriptor* commpage_32_routines[];
-extern commpage_descriptor* commpage_64_routines[];
-
-/* translated commpage descriptors from commpage_sigs.c */
-extern commpage_descriptor sigdata_descriptor;
-extern commpage_descriptor *ba_descriptors[];
extern vm_map_t com_region_map32; // the shared submap, set up in vm init
-extern vm_map_t com_region_map64; // the shared submap, set up in vm init
-
-char *commPagePtr32 = NULL; // virtual addr in kernel map of 32-bit commpage
-char *commPagePtr64 = NULL; // ...and of 64-bit commpage
-int _cpu_capabilities = 0; // define the capability vector
-
-int noVMX = 0; /* if true, do not set kHasAltivec in ppc _cpu_capabilities */
-
-void* dsmos_blobs[3]; /* ptrs to the system integrity data in each commpage */
-int dsmos_blob_count = 0;
-static uintptr_t next; // next available byte in comm page
-static int cur_routine; // comm page address of "current" routine
+static uintptr_t next = 0; // next available byte in comm page
+static int cur_routine = 0; // comm page address of "current" routine
static int matched; // true if we've found a match for "current" routine
-static char *commPagePtr; // virtual addr in kernel map of commpage we are working on
-static size_t commPageBaseOffset; // add to 32-bit runtime address to get offset in commpage
+int _cpu_capabilities = 0; // define the capability vector
+
+char *commPagePtr = NULL; // virtual address of comm page in kernel map
/* Allocate the commpage and add to the shared submap created by vm:
* 1. allocate a page in the kernel map (RW)
*/
static void*
-commpage_allocate(
- vm_map_t submap, // com_region_map32 or com_region_map64
- size_t area_used ) // _COMM_PAGE32_AREA_USED or _COMM_PAGE64_AREA_USED
+commpage_allocate( void )
{
- vm_offset_t kernel_addr; // address of commpage in kernel map
- vm_offset_t zero = 0;
- vm_size_t size = area_used; // size actually populated
- vm_map_entry_t entry;
- ipc_port_t handle;
-
- if (submap == NULL)
- panic("commpage submap is null");
-
- if (vm_allocate(kernel_map,&kernel_addr,area_used,VM_FLAGS_ANYWHERE))
- panic("cannot allocate commpage");
-
- if (vm_map_wire(kernel_map,kernel_addr,kernel_addr+area_used,VM_PROT_DEFAULT,FALSE))
- panic("cannot wire commpage");
-
- /*
- * Now that the object is created and wired into the kernel map, mark it so that no delay
- * copy-on-write will ever be performed on it as a result of mapping it into user-space.
- * If such a delayed copy ever occurred, we could remove the kernel's wired mapping - and
- * that would be a real disaster.
- *
- * JMM - What we really need is a way to create it like this in the first place.
- */
- if (!vm_map_lookup_entry( kernel_map, vm_map_trunc_page(kernel_addr), &entry) || entry->is_sub_map)
- panic("cannot find commpage entry");
- entry->object.vm_object->copy_strategy = MEMORY_OBJECT_COPY_NONE;
-
- if (mach_make_memory_entry( kernel_map, // target map
- &size, // size
- kernel_addr, // offset (address in kernel map)
- VM_PROT_DEFAULT, // map it RW
- &handle, // this is the object handle we get
- NULL )) // parent_entry (what is this?)
- panic("cannot make entry for commpage");
-
- if (vm_map_64( submap, // target map (shared submap)
- &zero, // address (map into 1st page in submap)
- area_used, // size
- 0, // mask
- VM_FLAGS_FIXED, // flags (it must be 1st page in submap)
- handle, // port is the memory entry we just made
- 0, // offset (map 1st page in memory entry)
- FALSE, // copy
- VM_PROT_READ, // cur_protection (R-only in user map)
- VM_PROT_READ, // max_protection
- VM_INHERIT_SHARE )) // inheritance
- panic("cannot map commpage");
-
- ipc_port_release(handle);
-
- return (void*) kernel_addr; // return address in kernel map
+ vm_offset_t kernel_addr; // address of commpage in kernel map
+ vm_offset_t zero = 0;
+ vm_size_t size = _COMM_PAGE_AREA_LENGTH;
+ vm_map_entry_t entry;
+ ipc_port_t handle;
+
+ if (com_region_map32 == NULL)
+ panic("commpage map is null");
+
+ if (vm_allocate(kernel_map,&kernel_addr,_COMM_PAGE_AREA_LENGTH,VM_FLAGS_ANYWHERE))
+ panic("cannot allocate commpage");
+
+ if (vm_map_wire(kernel_map,kernel_addr,kernel_addr+_COMM_PAGE_AREA_LENGTH,VM_PROT_DEFAULT,FALSE))
+ panic("cannot wire commpage");
+
+ /*
+ * Now that the object is created and wired into the kernel map, mark it so that no delay
+ * copy-on-write will ever be performed on it as a result of mapping it into user-space.
+ * If such a delayed copy ever occurred, we could remove the kernel's wired mapping - and
+ * that would be a real disaster.
+ *
+ * JMM - What we really need is a way to create it like this in the first place.
+ */
+ if (!vm_map_lookup_entry( kernel_map, vm_map_trunc_page(kernel_addr), &entry) || entry->is_sub_map)
+ panic("cannot find commpage entry");
+ entry->object.vm_object->copy_strategy = MEMORY_OBJECT_COPY_NONE;
+
+ if (mach_make_memory_entry( kernel_map, // target map
+ &size, // size
+ kernel_addr, // offset (address in kernel map)
+ VM_PROT_DEFAULT, // map it RW
+ &handle, // this is the object handle we get
+ NULL )) // parent_entry (what is this?)
+ panic("cannot make entry for commpage");
+
+ if (vm_map_64( com_region_map32, // target map (shared submap)
+ &zero, // address (map into 1st page in submap)
+ _COMM_PAGE_AREA_LENGTH, // size
+ 0, // mask
+ VM_FLAGS_FIXED, // flags (it must be 1st page in submap)
+ handle, // port is the memory entry we just made
+ 0, // offset (map 1st page in memory entry)
+ FALSE, // copy
+ VM_PROT_READ, // cur_protection (R-only in user map)
+ VM_PROT_READ, // max_protection
+ VM_INHERIT_SHARE )) // inheritance
+ panic("cannot map commpage");
+
+ ipc_port_release(handle);
+
+ return (void*) kernel_addr; // return address in kernel map
}
/* Get address (in kernel map) of a commpage field. */
commpage_addr_of(
int addr_at_runtime )
{
- return (void*) ((uintptr_t)commPagePtr + addr_at_runtime - commPageBaseOffset);
+ return (void*) ((uintptr_t)commPagePtr + addr_at_runtime - _COMM_PAGE_BASE_ADDRESS);
}
/* Determine number of CPUs on this system. We cannot rely on
ml_cpu_get_info(&cpu_info);
switch (cpu_info.vector_unit) {
- case 6:
- bits |= kHasSupplementalSSE3;
- /* fall thru */
case 5:
bits |= kHasSSE3;
/* fall thru */
bits |= kFastThreadLocalStorage; // we use %gs for TLS
- if (cpu_mode_is64bit()) // k64Bit means processor is 64-bit capable
- bits |= k64Bit;
-
_cpu_capabilities = bits; // set kernel version for use by drivers etc
}
-int
-_get_cpu_capabilities()
-{
- return _cpu_capabilities;
-}
-
/* Copy data into commpage. */
static void
commpage_stuff(
int address,
- const void *source,
+ void *source,
int length )
{
void *dest = commpage_addr_of(address);
next = ((uintptr_t)dest + length);
}
-static void
-commpage_stuff_swap(
- int address,
- void *source,
- int length,
- int legacy )
-{
- if ( legacy ) {
- void *dest = commpage_addr_of(address);
- dest = (void *)((uintptr_t) dest + _COMM_PAGE_SIGS_OFFSET);
- switch (length) {
- case 2:
- OSWriteSwapInt16(dest, 0, *(uint16_t *)source);
- break;
- case 4:
- OSWriteSwapInt32(dest, 0, *(uint32_t *)source);
- break;
- case 8:
- OSWriteSwapInt64(dest, 0, *(uint64_t *)source);
- break;
- }
- }
-}
static void
commpage_stuff2(
- int address,
- void *source,
- int length,
- int legacy )
+ int address,
+ void *source,
+ int length )
{
- commpage_stuff_swap(address, source, length, legacy);
commpage_stuff(address, source, length);
}
if (rd->commpage_address != cur_routine) {
if ((cur_routine!=0) && (matched==0))
- panic("commpage no match for last, next address %08x", rd->commpage_address);
+ panic("commpage no match");
cur_routine = rd->commpage_address;
matched = 0;
}
if ((must == rd->musthave) && (cant == 0)) {
if (matched)
- panic("commpage multiple matches for address %08x", rd->commpage_address);
+ panic("commpage duplicate matches");
matched = 1;
commpage_stuff(rd->commpage_address,rd->code_address,rd->code_length);
}
}
-/* Fill in the 32- or 64-bit commpage. Called once for each.
- * The 32-bit ("legacy") commpage has a bunch of stuff added to it
- * for translated processes, some of which is byte-swapped.
+
+#define COMMPAGE_DESC(name) commpage_ ## name
+#define EXTERN_COMMPAGE_DESC(name) \
+ extern commpage_descriptor COMMPAGE_DESC(name)
+
+EXTERN_COMMPAGE_DESC(compare_and_swap32_mp);
+EXTERN_COMMPAGE_DESC(compare_and_swap32_up);
+EXTERN_COMMPAGE_DESC(compare_and_swap64_mp);
+EXTERN_COMMPAGE_DESC(compare_and_swap64_up);
+EXTERN_COMMPAGE_DESC(atomic_add32_mp);
+EXTERN_COMMPAGE_DESC(atomic_add32_up);
+EXTERN_COMMPAGE_DESC(mach_absolute_time);
+EXTERN_COMMPAGE_DESC(spin_lock_try_mp);
+EXTERN_COMMPAGE_DESC(spin_lock_try_up);
+EXTERN_COMMPAGE_DESC(spin_lock_mp);
+EXTERN_COMMPAGE_DESC(spin_lock_up);
+EXTERN_COMMPAGE_DESC(spin_unlock);
+EXTERN_COMMPAGE_DESC(pthread_getspecific);
+EXTERN_COMMPAGE_DESC(gettimeofday);
+EXTERN_COMMPAGE_DESC(sys_flush_dcache);
+EXTERN_COMMPAGE_DESC(sys_icache_invalidate);
+EXTERN_COMMPAGE_DESC(pthread_self);
+EXTERN_COMMPAGE_DESC(relinquish);
+EXTERN_COMMPAGE_DESC(bit_test_and_set_mp);
+EXTERN_COMMPAGE_DESC(bit_test_and_set_up);
+EXTERN_COMMPAGE_DESC(bit_test_and_clear_mp);
+EXTERN_COMMPAGE_DESC(bit_test_and_clear_up);
+EXTERN_COMMPAGE_DESC(bzero_scalar);
+EXTERN_COMMPAGE_DESC(bcopy_scalar);
+EXTERN_COMMPAGE_DESC(nanotime);
+
+static commpage_descriptor *routines[] = {
+ &COMMPAGE_DESC(compare_and_swap32_mp),
+ &COMMPAGE_DESC(compare_and_swap32_up),
+ &COMMPAGE_DESC(compare_and_swap64_mp),
+ &COMMPAGE_DESC(compare_and_swap64_up),
+ &COMMPAGE_DESC(atomic_add32_mp),
+ &COMMPAGE_DESC(atomic_add32_up),
+ &COMMPAGE_DESC(mach_absolute_time),
+ &COMMPAGE_DESC(spin_lock_try_mp),
+ &COMMPAGE_DESC(spin_lock_try_up),
+ &COMMPAGE_DESC(spin_lock_mp),
+ &COMMPAGE_DESC(spin_lock_up),
+ &COMMPAGE_DESC(spin_unlock),
+ &COMMPAGE_DESC(pthread_getspecific),
+ &COMMPAGE_DESC(gettimeofday),
+ &COMMPAGE_DESC(sys_flush_dcache),
+ &COMMPAGE_DESC(sys_icache_invalidate),
+ &COMMPAGE_DESC(pthread_self),
+ &COMMPAGE_DESC(relinquish),
+ &COMMPAGE_DESC(bit_test_and_set_mp),
+ &COMMPAGE_DESC(bit_test_and_set_up),
+ &COMMPAGE_DESC(bit_test_and_clear_mp),
+ &COMMPAGE_DESC(bit_test_and_clear_up),
+ &COMMPAGE_DESC(bzero_scalar),
+ &COMMPAGE_DESC(bcopy_scalar),
+ &COMMPAGE_DESC(nanotime),
+ NULL
+};
+
+
+/* Fill in commpage: called once, during kernel initialization, from the
+ * startup thread before user-mode code is running.
+ * See the top of this file for a list of what you have to do to add
+ * a new routine to the commpage.
*/
-static void
-commpage_populate_one(
- vm_map_t submap, // com_region_map32 or com_region_map64
- char ** kernAddressPtr, // &commPagePtr32 or &commPagePtr64
- size_t area_used, // _COMM_PAGE32_AREA_USED or _COMM_PAGE64_AREA_USED
- size_t base_offset, // will become commPageBaseOffset
- commpage_descriptor** commpage_routines, // list of routine ptrs for this commpage
- boolean_t legacy, // true if 32-bit commpage
- const char* signature ) // "commpage 32-bit" or "commpage 64-bit"
+void
+commpage_populate( void )
{
short c2;
static double two52 = 1048576.0 * 1048576.0 * 4096.0; // 2**52
static double ten6 = 1000000.0; // 10**6
commpage_descriptor **rd;
short version = _COMM_PAGE_THIS_VERSION;
- int swapcaps;
- next = (uintptr_t) NULL;
- cur_routine = 0;
- commPagePtr = (char *)commpage_allocate( submap, (vm_size_t) area_used );
- *kernAddressPtr = commPagePtr; // save address either in commPagePtr32 or 64
- commPageBaseOffset = base_offset;
+ commPagePtr = (char *)commpage_allocate();
+
+ commpage_init_cpu_capabilities();
/* Stuff in the constants. We move things into the comm page in strictly
* ascending order, so we can check for overlap and panic if so.
*/
- commpage_stuff(_COMM_PAGE_SIGNATURE,signature,strlen(signature));
- commpage_stuff2(_COMM_PAGE_VERSION,&version,sizeof(short),legacy);
- commpage_stuff(_COMM_PAGE_CPU_CAPABILITIES,&_cpu_capabilities,sizeof(int));
-
- /* excuse our magic constants, we cannot include ppc/cpu_capabilities.h */
- /* always set kCache32 and kDcbaAvailable */
- swapcaps = 0x44;
- if ( _cpu_capabilities & kUP )
- swapcaps |= (kUP + (1 << kNumCPUsShift));
- else
- swapcaps |= 2 << kNumCPUsShift; /* limit #cpus to 2 */
- if ( ! noVMX ) /* if rosetta will be emulating altivec... */
- swapcaps |= 0x101; /* ...then set kHasAltivec and kDataStreamsAvailable too */
- commpage_stuff_swap(_COMM_PAGE_CPU_CAPABILITIES, &swapcaps, sizeof(int), legacy);
- c2 = 32;
- commpage_stuff_swap(_COMM_PAGE_CACHE_LINESIZE,&c2,2,legacy);
+
+ commpage_stuff2(_COMM_PAGE_VERSION,&version,sizeof(short));
+ commpage_stuff(_COMM_PAGE_CPU_CAPABILITIES,&_cpu_capabilities,
+ sizeof(int));
if (_cpu_capabilities & kCache32)
c2 = 32;
c2 = 128;
commpage_stuff(_COMM_PAGE_CACHE_LINESIZE,&c2,2);
- if ( legacy ) {
- commpage_stuff2(_COMM_PAGE_2_TO_52,&two52,8,legacy);
- commpage_stuff2(_COMM_PAGE_10_TO_6,&ten6,8,legacy);
- }
+ c2 = 32;
- for( rd = commpage_routines; *rd != NULL ; rd++ )
+ commpage_stuff2(_COMM_PAGE_2_TO_52,&two52,8);
+
+ commpage_stuff2(_COMM_PAGE_10_TO_6,&ten6,8);
+
+ for( rd = routines; *rd != NULL ; rd++ )
commpage_stuff_routine(*rd);
if (!matched)
if (next > (uintptr_t)_COMM_PAGE_END)
panic("commpage overflow: next = 0x%08x, commPagePtr = 0x%08x", next, (uintptr_t)commPagePtr);
- if ( legacy ) {
- next = (uintptr_t) NULL;
- for( rd = ba_descriptors; *rd != NULL ; rd++ )
- commpage_stuff_routine(*rd);
-
- next = (uintptr_t) NULL;
- commpage_stuff_routine(&sigdata_descriptor);
- }
- /* salt away a ptr to the system integrity data in this commpage */
- dsmos_blobs[dsmos_blob_count++] =
- commpage_addr_of( _COMM_PAGE_SYSTEM_INTEGRITY );
+ pmap_commpage_init((vm_offset_t) commPagePtr, _COMM_PAGE_BASE_ADDRESS,
+ _COMM_PAGE_AREA_LENGTH/INTEL_PGBYTES);
}
-
-/* Fill in commpages: called once, during kernel initialization, from the
- * startup thread before user-mode code is running.
- *
- * See the top of this file for a list of what you have to do to add
- * a new routine to the commpage.
- */
+/*
+ * This macro prevents compiler instruction scheduling:
+ */
+#define NO_REORDERING asm volatile("" : : : "memory")
void
-commpage_populate( void )
+commpage_set_nanotime(commpage_nanotime_t *newp)
{
- commpage_init_cpu_capabilities();
-
- commpage_populate_one( com_region_map32,
- &commPagePtr32,
- _COMM_PAGE32_AREA_USED,
- _COMM_PAGE32_BASE_ADDRESS,
- commpage_32_routines,
- TRUE, /* legacy (32-bit) commpage */
- "commpage 32-bit");
- pmap_commpage32_init((vm_offset_t) commPagePtr32, _COMM_PAGE32_BASE_ADDRESS,
- _COMM_PAGE32_AREA_USED/INTEL_PGBYTES);
-
- if (_cpu_capabilities & k64Bit) {
- commpage_populate_one( com_region_map64,
- &commPagePtr64,
- _COMM_PAGE64_AREA_USED,
- _COMM_PAGE32_START_ADDRESS, /* because kernel is built 32-bit */
- commpage_64_routines,
- FALSE, /* not a legacy commpage */
- "commpage 64-bit");
- pmap_commpage64_init((vm_offset_t) commPagePtr64, _COMM_PAGE64_BASE_ADDRESS,
- _COMM_PAGE64_AREA_USED/INTEL_PGBYTES);
- }
+ commpage_nanotime_t *cnp;
+
+ /* Nop if commpage not set up yet */
+ if (commPagePtr == NULL)
+ return;
- rtc_nanotime_init_commpage();
+ cnp = (commpage_nanotime_t *)commpage_addr_of(_COMM_PAGE_NANOTIME_INFO);
+
+ /*
+ * Update in reverse order:
+ * check_tsc first - it's read and compared with base_tsc last.
+ */
+ cnp->nt_check_tsc = newp->nt_base_tsc; NO_REORDERING;
+ cnp->nt_shift = newp->nt_shift; NO_REORDERING;
+ cnp->nt_scale = newp->nt_scale; NO_REORDERING;
+ cnp->nt_base_ns = newp->nt_base_ns; NO_REORDERING;
+ cnp->nt_base_tsc = newp->nt_base_tsc;
}
+
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