/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
#ifndef _PPC_SAVEAREA_H_
#define _PPC_SAVEAREA_H_
-#include <ppc/exception.h>
+#ifndef ASSEMBLER
+
+#include <sys/appleapiopts.h>
+
+#ifdef __APPLE_API_PRIVATE
+
+#ifdef MACH_KERNEL_PRIVATE
#include <mach/ppc/vm_types.h>
+typedef struct savearea_comm {
+
+/*
+ * The following fields are common to all saveareas and are used to manage individual
+ * contexts.
+ *
+ * Fields that start with "save" are part of the individual saveareas. Those that
+ * start with "sac" pertain to the free pool stuff and are valid only on the first slot
+ * in the page.
+ */
+
+
+/* Keep the save_prev, sac_next, and sac_prev in these positions, some assemble code depends upon it to
+ * match up with fields in saveanchor.
+ */
+ struct savearea *save_prev; /* The address of the previous (or next) savearea */
+ unsigned int *sac_next; /* Points to next savearea page that has a free slot - real */
+ unsigned int *sac_prev; /* Points to previous savearea page that has a free slot - real */
+ unsigned int save_flags; /* Various flags */
+ unsigned int save_level; /* Context ID */
+ unsigned int save_time[2]; /* Context save time - for debugging or performance */
+ struct thread_activation *save_act; /* Associated activation */
+
+/* 0x20 */
+
+ unsigned int sac_vrswap; /* XOR mask to swap V to R or vice versa */
+ unsigned int sac_alloc; /* Bitmap of allocated slots */
+ unsigned int sac_flags; /* Various flags */
+ unsigned int save_misc0; /* Various stuff */
+ unsigned int save_misc1; /* Various stuff */
+ unsigned int save_misc2; /* Various stuff */
+ unsigned int save_misc3; /* Various stuff */
+ unsigned int save_misc4; /* Various stuff */
+
+ unsigned int save_040[8]; /* Fill 32 bytes */
+
+ /* offset 0x0060 */
+} savearea_comm;
+#endif
+
+#ifdef BSD_KERNEL_PRIVATE
+typedef struct savearea_comm {
+ unsigned int save_000[24];
+} savearea_comm;
+#endif
+
+#if defined(MACH_KERNEL_PRIVATE) || defined(BSD_KERNEL_PRIVATE)
+/*
+ * This type of savearea contains all of the general context.
+ */
+
+typedef struct savearea {
+
+ savearea_comm save_hdr; /* Stuff common to all saveareas */
+
+ unsigned int save_060[8]; /* Fill 32 bytes */
+ /* offset 0x0080 */
+ unsigned int save_r0;
+ unsigned int save_r1;
+ unsigned int save_r2;
+ unsigned int save_r3;
+ unsigned int save_r4;
+ unsigned int save_r5;
+ unsigned int save_r6;
+ unsigned int save_r7;
+
+ /* offset 0x0A0 */
+ unsigned int save_r8;
+ unsigned int save_r9;
+ unsigned int save_r10;
+ unsigned int save_r11;
+ unsigned int save_r12;
+ unsigned int save_r13;
+ unsigned int save_r14;
+ unsigned int save_r15;
+
+ /* offset 0x0C0 */
+ unsigned int save_r16;
+ unsigned int save_r17;
+ unsigned int save_r18;
+ unsigned int save_r19;
+ unsigned int save_r20;
+ unsigned int save_r21;
+ unsigned int save_r22;
+ unsigned int save_r23;
+
+ /* offset 0x0E0 */
+ unsigned int save_r24;
+ unsigned int save_r25;
+ unsigned int save_r26;
+ unsigned int save_r27;
+ unsigned int save_r28;
+ unsigned int save_r29;
+ unsigned int save_r30;
+ unsigned int save_r31;
+
+ /* offset 0x100 */
+ unsigned int save_srr0;
+ unsigned int save_srr1;
+ unsigned int save_cr;
+ unsigned int save_xer;
+ unsigned int save_lr;
+ unsigned int save_ctr;
+ unsigned int save_dar;
+ unsigned int save_dsisr;
+
+
+ /* offset 0x120 */
+ unsigned int save_vscr[4];
+ unsigned int save_fpscrpad;
+ unsigned int save_fpscr;
+ unsigned int save_exception;
+ unsigned int save_vrsave;
+
+ /* offset 0x140 */
+ unsigned int save_sr0;
+ unsigned int save_sr1;
+ unsigned int save_sr2;
+ unsigned int save_sr3;
+ unsigned int save_sr4;
+ unsigned int save_sr5;
+ unsigned int save_sr6;
+ unsigned int save_sr7;
+
+ /* offset 0x160 */
+ unsigned int save_sr8;
+ unsigned int save_sr9;
+ unsigned int save_sr10;
+ unsigned int save_sr11;
+ unsigned int save_sr12;
+ unsigned int save_sr13;
+ unsigned int save_sr14;
+ unsigned int save_sr15;
+
+ /* offset 0x180 */
+ unsigned int save_180[8];
+ unsigned int save_1A0[8];
+ unsigned int save_1C0[8];
+ unsigned int save_1E0[8];
+ unsigned int save_200[8];
+ unsigned int save_220[8];
+ unsigned int save_240[8];
+ unsigned int save_260[8];
+
+ /* offset 0x280 */
+} savearea;
+
+
+/*
+ * This type of savearea contains all of the floating point context.
+ */
+
+typedef struct savearea_fpu {
-void save_release(struct savearea *save); /* Release a save area */
+ savearea_comm save_hdr; /* Stuff common to all saveareas */
+
+ unsigned int save_060[8]; /* Fill 32 bytes */
+ /* offset 0x0080 */
+ double save_fp0;
+ double save_fp1;
+ double save_fp2;
+ double save_fp3;
+
+ double save_fp4;
+ double save_fp5;
+ double save_fp6;
+ double save_fp7;
+
+ double save_fp8;
+ double save_fp9;
+ double save_fp10;
+ double save_fp11;
+
+ double save_fp12;
+ double save_fp13;
+ double save_fp14;
+ double save_fp15;
+
+ double save_fp16;
+ double save_fp17;
+ double save_fp18;
+ double save_fp19;
+
+ double save_fp20;
+ double save_fp21;
+ double save_fp22;
+ double save_fp23;
+
+ double save_fp24;
+ double save_fp25;
+ double save_fp26;
+ double save_fp27;
+
+ double save_fp28;
+ double save_fp29;
+ double save_fp30;
+ double save_fp31;
+ /* offset 0x180 */
+ unsigned int save_180[8];
+ unsigned int save_1A0[8];
+ unsigned int save_1C0[8];
+ unsigned int save_1E0[8];
+ unsigned int save_200[8];
+ unsigned int save_220[8];
+ unsigned int save_240[8];
+ unsigned int save_260[8];
+
+ /* offset 0x280 */
+} savearea_fpu;
+
+
+
+/*
+ * This type of savearea contains all of the vector context.
+ */
+
+typedef struct savearea_vec {
+
+ savearea_comm save_hdr; /* Stuff common to all saveareas */
+
+ unsigned int save_060[7]; /* Fill 32 bytes */
+ unsigned int save_vrvalid; /* Valid registers in saved context */
+
+ /* offset 0x0080 */
+ unsigned int save_vr0[4];
+ unsigned int save_vr1[4];
+ unsigned int save_vr2[4];
+ unsigned int save_vr3[4];
+ unsigned int save_vr4[4];
+ unsigned int save_vr5[4];
+ unsigned int save_vr6[4];
+ unsigned int save_vr7[4];
+ unsigned int save_vr8[4];
+ unsigned int save_vr9[4];
+ unsigned int save_vr10[4];
+ unsigned int save_vr11[4];
+ unsigned int save_vr12[4];
+ unsigned int save_vr13[4];
+ unsigned int save_vr14[4];
+ unsigned int save_vr15[4];
+ unsigned int save_vr16[4];
+ unsigned int save_vr17[4];
+ unsigned int save_vr18[4];
+ unsigned int save_vr19[4];
+ unsigned int save_vr20[4];
+ unsigned int save_vr21[4];
+ unsigned int save_vr22[4];
+ unsigned int save_vr23[4];
+ unsigned int save_vr24[4];
+ unsigned int save_vr25[4];
+ unsigned int save_vr26[4];
+ unsigned int save_vr27[4];
+ unsigned int save_vr28[4];
+ unsigned int save_vr29[4];
+ unsigned int save_vr30[4];
+ unsigned int save_vr31[4];
+
+ /* offset 0x280 */
+} savearea_vec;
+#endif /* MACH_KERNEL_PRIVATE || BSD_KERNEL_PRIVATE */
+
+#ifdef MACH_KERNEL_PRIVATE
+
+struct Saveanchor {
+
+/*
+ * Note that this force aligned in aligned_data.s and must be in V=R storage.
+ * Also, all addresses in chains are physical. This structure can only be
+ * updated with translation and interrupts disabled. This is because it is
+ * locked during exception processing and if we were to take a PTE miss while the
+ * lock were held, well, that would be very bad now wouldn't it?
+ */
+
+ unsigned int savelock; /* Lock word for savearea free list manipulation */
+ unsigned int *savepoolfwd; /* Forward anchor for the free pool */
+ unsigned int *savepoolbwd; /* Backward anchor for the free pool */
+ volatile unsigned int savefree; /* Anchor for the global free list */
+ volatile unsigned int savefreecnt; /* Number of saveareas on global free list */
+ volatile int saveadjust; /* If 0 number of saveareas is ok, otherwise number to change (positive means grow, negative means shrink */
+ volatile int saveinuse; /* Number of areas in use counting those on the local free list */
+ volatile int savetarget; /* Number of savearea's needed */
+ int savemaxcount; /* Maximum saveareas ever allocated */
+
+
+};
+
+
+#define sac_cnt (4096 / sizeof(savearea)) /* Number of saveareas per page */
+#define sac_empty (0xFFFFFFFF << (32 - sac_cnt)) /* Mask with all entries empty */
+#define sac_perm 0x40000000 /* Page permanently assigned */
+#define sac_permb 1 /* Page permanently assigned - bit position */
+
+#define LocalSaveTarget (((8 + sac_cnt - 1) / sac_cnt) * sac_cnt) /* Target for size of local savearea free list */
+#define LocalSaveMin (LocalSaveTarget / 2) /* Min size of local savearea free list before we grow */
+#define LocalSaveMax (LocalSaveTarget * 2) /* Max size of local savearea free list before we trim */
+
+#define FreeListMin (2 * LocalSaveTarget * NCPUS) /* Always make sure there are enough to fill local list twice per processor */
+#define SaveLowHysteresis LocalSaveTarget /* The number off from target before we adjust upwards */
+#define SaveHighHysteresis FreeListMin /* The number off from target before we adjust downwards */
+#define InitialSaveAreas (2 * FreeListMin) /* The number of saveareas to make at boot time */
+#define InitialSaveTarget FreeListMin /* The number of saveareas for an initial target. This should be the minimum ever needed. */
+#define InitialSaveBloks (InitialSaveAreas + sac_cnt - 1) / sac_cnt /* The number of savearea blocks to allocate at boot */
+
+
+void save_release(struct savearea *); /* Release a save area */
struct savectl *save_dequeue(void); /* Find and dequeue one that is all empty */
-unsigned int save_queue(vm_offset_t); /* Add a new savearea block to the free list */
+unsigned int save_queue(struct savearea *); /* Add a new savearea block to the free list */
struct savearea *save_get(void); /* Obtains a savearea from the free list (returns virtual address) */
struct savearea *save_get_phys(void); /* Obtains a savearea from the free list (returns physical address) */
struct savearea *save_alloc(void); /* Obtains a savearea and allocates blocks if needed */
struct savearea *save_cpv(struct savearea *); /* Converts a physical savearea address to virtual */
-unsigned int *save_deb(unsigned int *msr); /* Finds virtual of first free block and disableds interrupts */
void save_ret(struct savearea *); /* Returns a savearea to the free list */
-#if DEBUG
-void save_free_dump(void); /* Dump the free chain */
-void DumpTheSave(struct savearea *); /* Prints out a savearea */
-void DumpBackChain(struct savearea *save); /* Dumps a backchain */
-#endif
+void save_ret_phys(struct savearea *); /* Returns a savearea to the free list */
+void save_adjust(void); /* Adjust size of the global free list */
+struct savearea_comm *save_trim_freet(void); /* Remove free pages from savearea pool */
-#endif /* _PPC_SAVEAREA_H_ */
+#endif /* MACH_KERNEL_PRIVATE */
+#endif /* __APPLE_API_PRIVATE */
+
+#endif /* ndef ASSEMBLER */
+#define SAVattach 0x80000000 /* Savearea has valid context */
+#define SAVrststk 0x00010000 /* Indicates that the current stack should be reset to empty */
+#define SAVsyscall 0x00020000 /* Indicates that the savearea is associated with a syscall */
+#define SAVredrive 0x00040000 /* Indicates that the low-level fault handler associated */
+#define SAVtype 0x0000FF00 /* Shows type of savearea */
+#define SAVtypeshft 8 /* Shift to position type */
+#define SAVempty 0x86 /* Savearea is on free list */
+#define SAVgeneral 0x01 /* Savearea contains general context */
+#define SAVfloat 0x02 /* Savearea contains floating point context */
+#define SAVvector 0x03 /* Savearea contains vector context */
+#endif /* _PPC_SAVEAREA_H_ */
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