[apple/xnu.git] / osfmk / ppc / savearea.h

/*
 * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_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 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.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
#ifndef _PPC_SAVEAREA_H_
#define _PPC_SAVEAREA_H_

#ifndef ASSEMBLER

#include <sys/appleapiopts.h>

#ifdef __APPLE_API_PRIVATE

#ifdef	MACH_KERNEL_PRIVATE
#include <stdint.h>
#include <mach/vm_types.h>

#pragma pack(4)							/* Make sure the structure stays as we defined it */
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 assembler code depends upon it to
 *	match up with fields in saveanchor.
 */
                                                /* offset 0x000 */
	addr64_t		save_prev;					/* The address of the previous (or next) savearea */
	addr64_t		sac_next;					/* Points to next savearea page that has a free slot  - real */
	addr64_t		sac_prev;					/* Points to previous savearea page that has a free slot  - real */
	unsigned int	save_level;					/* Context ID */
	unsigned int	save_01C;

												/*	 0x20 */
	unsigned int	save_time[2];				/* Context save time - for debugging or performance */
	struct thread_activation	*save_act;		/* Associated activation  */
    unsigned int	save_02c;
	uint64_t		sac_vrswap;					/* XOR mask to swap V to R or vice versa */
	unsigned int	save_flags;					/* Various flags */
	unsigned int	sac_flags;					/* Various flags */
    
                                                /* offset 0x040 */
	uint64_t		save_misc0;					/* Various stuff */
	uint64_t		save_misc1;					/* Various stuff */
	unsigned int	sac_alloc;					/* Bitmap of allocated slots */
    unsigned int	save_054;
    unsigned int	save_misc2;
    unsigned int	save_misc3;

												/* offset 0x0060 */
} savearea_comm;
#pragma pack()
#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.
 */
 
#pragma pack(4)							/* Make sure the structure stays as we defined it */
typedef struct savearea {

	savearea_comm	save_hdr;					/* Stuff common to all saveareas */

	uint64_t		save_xdat0;					/* Exception data 0 */
	uint64_t		save_xdat1;					/* Exception data 1 */
	uint64_t		save_xdat2;					/* Exception data 2 */
	uint64_t		save_xdat3;					/* Exception data 3 */
                                             
                                                /* offset 0x0080 */
	uint64_t	 	save_r0;
	uint64_t	 	save_r1;
	uint64_t	 	save_r2;
	uint64_t	 	save_r3;
                                                /* offset 0x0A0 */
	uint64_t	 	save_r4;
	uint64_t	 	save_r5;
	uint64_t	 	save_r6;
	uint64_t	 	save_r7;
                                                /* offset 0x0C0 */
	uint64_t	 	save_r8;
	uint64_t	 	save_r9;
	uint64_t	 	save_r10;
	uint64_t	 	save_r11;
                                                /* offset 0x0E0 */
	uint64_t	 	save_r12;
	uint64_t	 	save_r13;
	uint64_t	 	save_r14;
	uint64_t	 	save_r15;
                                                /* offset 0x100 */
	uint64_t	 	save_r16;
	uint64_t	 	save_r17;
	uint64_t	 	save_r18;
	uint64_t	 	save_r19;
                                                /* offset 0x120 */
	uint64_t	 	save_r20;
	uint64_t	 	save_r21;
	uint64_t	 	save_r22;
	uint64_t	 	save_r23;
                                                /* offset 0x140 */
	uint64_t	 	save_r24;
	uint64_t	 	save_r25;
	uint64_t	 	save_r26;	
	uint64_t	 	save_r27;
                                                /* offset 0x160 */
	uint64_t	 	save_r28;
	uint64_t		save_r29;
	uint64_t	 	save_r30;
	uint64_t	 	save_r31;
                                                /* offset 0x180 */
	uint64_t	 	save_srr0;
 	uint64_t	 	save_srr1;
	uint64_t	 	save_xer;
	uint64_t	 	save_lr;
                                                /* offset 0x1A0 */
	uint64_t	 	save_ctr;
	uint64_t	 	save_dar;
	unsigned int	save_cr;
	unsigned int 	save_dsisr;
	unsigned int	save_exception; 
	unsigned int	save_vrsave;
                                                /* offset 0x1C0 */
	unsigned int	save_vscr[4];
	unsigned int	save_fpscrpad;
	unsigned int	save_fpscr;
    unsigned int	save_1d8[2];
                                                /* offset 0x1E0 */
	unsigned int	save_1E0[8];
                                                /* offset 0x200 - keep on 128 byte bndry */
    uint32_t        save_pmc[8]; 
    uint64_t        save_mmcr0;					/* offset 0x220 */
    uint64_t        save_mmcr1;
    uint64_t        save_mmcr2;

	unsigned int	save_238[2];
												/* offset 0x240 */
	unsigned int	save_instr[16];				/* Instrumentation */
												/* offset 0x280 */
} savearea;
#pragma pack()


/*
 *	This type of savearea contains all of the floating point context.
 */
 
#pragma pack(4)							/* Make sure the structure stays as we defined it */
typedef struct savearea_fpu {

	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;
#pragma pack()

	
/*
 *	This type of savearea contains all of the vector context.
 */
 
#pragma pack(4)							/* Make sure the structure stays as we defined it */
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;
#pragma pack()
#endif /* MACH_KERNEL_PRIVATE || BSD_KERNEL_PRIVATE */

#ifdef	MACH_KERNEL_PRIVATE

#pragma pack(4)							/* Make sure the structure stays as we defined it */
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? 
 *  Note that the first 24 bytes must be the same format as a savearea header.
 */

	unsigned int			savelock;		/* 000 Lock word for savearea free list manipulation */
    int						saveRSVD4;		/* 004 reserved */
	addr64_t				savepoolfwd;	/* 008 Forward anchor for the free pool */
	addr64_t				savepoolbwd;	/* 010 Backward anchor for the free pool */
	volatile addr64_t		savefree;		/* 018 Anchor for the global free list */
	volatile unsigned int	savefreecnt;	/* 020 Number of saveareas on global free list */
	volatile int			saveadjust;		/* 024 If 0 number of saveareas is ok, otherwise # to change (pos means grow, neg means shrink */
	volatile int			saveinuse;		/* 028 Number of areas in use counting those on the local free list */
	volatile int			savetarget;		/* 02C Number of savearea's needed */
	int						savemaxcount;	/* 030 Maximum saveareas ever allocated */
	unsigned int			saveRSVD034[3];	/* 034 reserved */
/*											   040 */

};
#pragma pack()


#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 */
#define BackPocketSaveBloks	8				/* Number of pages of back pocket saveareas */

void			save_queue(ppnum_t);		/* Add a new savearea block to the free list */
addr64_t		save_get_init(void);		/* special savearea-get for cpu initialization (returns physical address) */
struct savearea	*save_get(void);			/* Obtains a savearea from the free list (returns virtual address) */
reg64_t			save_get_phys_32(void);		/* Obtains a savearea from the free list (returns phys addr in r3) */
reg64_t			save_get_phys_64(void);		/* Obtains a savearea from the free list (returns phys addr in r3) */
struct savearea	*save_alloc(void);			/* Obtains a savearea and allocates blocks if needed */
struct savearea	*save_cpv(addr64_t);		/* Converts a physical savearea address to virtual */
void			save_ret(struct savearea *);	/* Returns a savearea to the free list by virtual address */
void			save_ret_wMSR(struct savearea *, reg64_t);	/* returns a savearea and restores an MSR */
void			save_ret_phys(reg64_t);		/* Returns a savearea to the free list by physical address */
void			save_adjust(void);			/* Adjust size of the global free list */
struct savearea_comm	*save_trim_free(void);	/* Remove free pages from savearea pool */
int				save_recover(void);			/* returns nonzero if we can recover enough from the free pool */
void 			savearea_init(vm_offset_t addr);	/* Boot-time savearea initialization */


#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 SAVredriveb	13						/* Indicates that the low-level fault handler associated */
#define	SAVinstrument 0x00080000			/* Indicates that we should return instrumentation data */
#define	SAVinstrumentb 12					/* Indicates that we should return instrumentation data */
#define	SAVeat 		0x00100000				/* Indicates that interruption should be ignored */
#define	SAVeatb 	11						/* Indicates that interruption should be ignored */
#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_ */
Commit	Line	Data
1c79356b	1	/*
9bccf70c	2	* Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
1c79356b A	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
e5568f75 A	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
1c79356b	11	*
e5568f75 A	12	* This Original Code and all software distributed under the License are
e5568f75 A	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
e5568f75 A	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
1c79356b A	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	#ifndef _PPC_SAVEAREA_H_
	23	#define _PPC_SAVEAREA_H_
	24
9bccf70c A	25	#ifndef ASSEMBLER
	26
	27	#include <sys/appleapiopts.h>
	28
	29	#ifdef __APPLE_API_PRIVATE
	30
	31	#ifdef MACH_KERNEL_PRIVATE
55e303ae A	32	#include <stdint.h>
	33	#include <mach/vm_types.h>
	34
	35	#pragma pack(4) /* Make sure the structure stays as we defined it */
9bccf70c A	36	typedef struct savearea_comm {
	37
	38	/*
	39	* The following fields are common to all saveareas and are used to manage individual
	40	* contexts.
	41	*
	42	* Fields that start with "save" are part of the individual saveareas. Those that
	43	* start with "sac" pertain to the free pool stuff and are valid only on the first slot
	44	* in the page.
	45	*/
	46
	47
55e303ae	48	/* Keep the save_prev, sac_next, and sac_prev in these positions, some assembler code depends upon it to
9bccf70c A	49	* match up with fields in saveanchor.
9bccf70c A	50	*/
55e303ae A	51	/* offset 0x000 */
	52	addr64_t save_prev; /* The address of the previous (or next) savearea */
	53	addr64_t sac_next; /* Points to next savearea page that has a free slot - real */
	54	addr64_t sac_prev; /* Points to previous savearea page that has a free slot - real */
9bccf70c	55	unsigned int save_level; /* Context ID */
55e303ae A	56	unsigned int save_01C;
	57
	58	/* 0x20 */
9bccf70c A	59	unsigned int save_time[2]; /* Context save time - for debugging or performance */
9bccf70c A	60	struct thread_activation save_act; / Associated activation */
55e303ae A	61	unsigned int save_02c;
	62	uint64_t sac_vrswap; /* XOR mask to swap V to R or vice versa */
	63	unsigned int save_flags; /* Various flags */
de355530	64	unsigned int sac_flags; /* Various flags */
55e303ae A	65
	66	/* offset 0x040 */
	67	uint64_t save_misc0; /* Various stuff */
	68	uint64_t save_misc1; /* Various stuff */
	69	unsigned int sac_alloc; /* Bitmap of allocated slots */
	70	unsigned int save_054;
	71	unsigned int save_misc2;
	72	unsigned int save_misc3;
9bccf70c A	73
	74	/* offset 0x0060 */
	75	} savearea_comm;
55e303ae	76	#pragma pack()
9bccf70c A	77	#endif
	78
	79	#ifdef BSD_KERNEL_PRIVATE
	80	typedef struct savearea_comm {
	81	unsigned int save_000[24];
	82	} savearea_comm;
	83	#endif
	84
	85	#if defined(MACH_KERNEL_PRIVATE) \|\| defined(BSD_KERNEL_PRIVATE)
	86	/*
	87	* This type of savearea contains all of the general context.
	88	*/
	89
55e303ae	90	#pragma pack(4) /* Make sure the structure stays as we defined it */
9bccf70c A	91	typedef struct savearea {
	92
	93	savearea_comm save_hdr; /* Stuff common to all saveareas */
	94
e5568f75 A	95	uint64_t save_xdat0; /* Exception data 0 */
	96	uint64_t save_xdat1; /* Exception data 1 */
	97	uint64_t save_xdat2; /* Exception data 2 */
	98	uint64_t save_xdat3; /* Exception data 3 */
	99
55e303ae A	100	/* offset 0x0080 */
	101	uint64_t save_r0;
	102	uint64_t save_r1;
	103	uint64_t save_r2;
	104	uint64_t save_r3;
	105	/* offset 0x0A0 */
	106	uint64_t save_r4;
	107	uint64_t save_r5;
	108	uint64_t save_r6;
	109	uint64_t save_r7;
	110	/* offset 0x0C0 */
	111	uint64_t save_r8;
	112	uint64_t save_r9;
	113	uint64_t save_r10;
	114	uint64_t save_r11;
	115	/* offset 0x0E0 */
	116	uint64_t save_r12;
	117	uint64_t save_r13;
	118	uint64_t save_r14;
	119	uint64_t save_r15;
	120	/* offset 0x100 */
	121	uint64_t save_r16;
	122	uint64_t save_r17;
	123	uint64_t save_r18;
	124	uint64_t save_r19;
	125	/* offset 0x120 */
	126	uint64_t save_r20;
	127	uint64_t save_r21;
	128	uint64_t save_r22;
	129	uint64_t save_r23;
	130	/* offset 0x140 */
	131	uint64_t save_r24;
	132	uint64_t save_r25;
	133	uint64_t save_r26;
	134	uint64_t save_r27;
	135	/* offset 0x160 */
	136	uint64_t save_r28;
	137	uint64_t save_r29;
	138	uint64_t save_r30;
	139	uint64_t save_r31;
	140	/* offset 0x180 */
	141	uint64_t save_srr0;
	142	uint64_t save_srr1;
	143	uint64_t save_xer;
	144	uint64_t save_lr;
	145	/* offset 0x1A0 */
	146	uint64_t save_ctr;
	147	uint64_t save_dar;
9bccf70c	148	unsigned int save_cr;
9bccf70c	149	unsigned int save_dsisr;
55e303ae A	150	unsigned int save_exception;
	151	unsigned int save_vrsave;
	152	/* offset 0x1C0 */
	153	unsigned int save_vscr[4];
9bccf70c A	154	unsigned int save_fpscrpad;
9bccf70c A	155	unsigned int save_fpscr;
55e303ae A	156	unsigned int save_1d8[2];
55e303ae A	157	/* offset 0x1E0 */
9bccf70c	158	unsigned int save_1E0[8];
55e303ae A	159	/* offset 0x200 - keep on 128 byte bndry */
	160	uint32_t save_pmc[8];
	161	uint64_t save_mmcr0; /* offset 0x220 */
	162	uint64_t save_mmcr1;
	163	uint64_t save_mmcr2;
	164
	165	unsigned int save_238[2];
	166	/* offset 0x240 */
	167	unsigned int save_instr[16]; /* Instrumentation */
9bccf70c A	168	/* offset 0x280 */
9bccf70c A	169	} savearea;
55e303ae	170	#pragma pack()
9bccf70c A	171
	172
	173	/*
	174	* This type of savearea contains all of the floating point context.
	175	*/
	176
55e303ae	177	#pragma pack(4) /* Make sure the structure stays as we defined it */
9bccf70c	178	typedef struct savearea_fpu {
1c79356b	179
9bccf70c A	180	savearea_comm save_hdr; /* Stuff common to all saveareas */
	181
	182	unsigned int save_060[8]; /* Fill 32 bytes */
	183	/* offset 0x0080 */
	184	double save_fp0;
	185	double save_fp1;
	186	double save_fp2;
	187	double save_fp3;
	188
	189	double save_fp4;
	190	double save_fp5;
	191	double save_fp6;
	192	double save_fp7;
	193
	194	double save_fp8;
	195	double save_fp9;
	196	double save_fp10;
	197	double save_fp11;
	198
	199	double save_fp12;
	200	double save_fp13;
	201	double save_fp14;
	202	double save_fp15;
	203
	204	double save_fp16;
	205	double save_fp17;
	206	double save_fp18;
	207	double save_fp19;
	208
	209	double save_fp20;
	210	double save_fp21;
	211	double save_fp22;
	212	double save_fp23;
	213
	214	double save_fp24;
	215	double save_fp25;
	216	double save_fp26;
	217	double save_fp27;
	218
	219	double save_fp28;
	220	double save_fp29;
	221	double save_fp30;
	222	double save_fp31;
	223	/* offset 0x180 */
	224	unsigned int save_180[8];
	225	unsigned int save_1A0[8];
	226	unsigned int save_1C0[8];
	227	unsigned int save_1E0[8];
	228	unsigned int save_200[8];
	229	unsigned int save_220[8];
	230	unsigned int save_240[8];
	231	unsigned int save_260[8];
	232
	233	/* offset 0x280 */
	234	} savearea_fpu;
55e303ae	235	#pragma pack()
9bccf70c A	236
	237
	238
	239	/*
	240	* This type of savearea contains all of the vector context.
	241	*/
	242
55e303ae	243	#pragma pack(4) /* Make sure the structure stays as we defined it */
9bccf70c A	244	typedef struct savearea_vec {
	245
	246	savearea_comm save_hdr; /* Stuff common to all saveareas */
	247
	248	unsigned int save_060[7]; /* Fill 32 bytes */
	249	unsigned int save_vrvalid; /* Valid registers in saved context */
	250
	251	/* offset 0x0080 */
	252	unsigned int save_vr0[4];
	253	unsigned int save_vr1[4];
	254	unsigned int save_vr2[4];
	255	unsigned int save_vr3[4];
	256	unsigned int save_vr4[4];
	257	unsigned int save_vr5[4];
	258	unsigned int save_vr6[4];
	259	unsigned int save_vr7[4];
	260	unsigned int save_vr8[4];
	261	unsigned int save_vr9[4];
	262	unsigned int save_vr10[4];
	263	unsigned int save_vr11[4];
	264	unsigned int save_vr12[4];
	265	unsigned int save_vr13[4];
	266	unsigned int save_vr14[4];
	267	unsigned int save_vr15[4];
	268	unsigned int save_vr16[4];
	269	unsigned int save_vr17[4];
	270	unsigned int save_vr18[4];
	271	unsigned int save_vr19[4];
	272	unsigned int save_vr20[4];
	273	unsigned int save_vr21[4];
	274	unsigned int save_vr22[4];
	275	unsigned int save_vr23[4];
	276	unsigned int save_vr24[4];
	277	unsigned int save_vr25[4];
	278	unsigned int save_vr26[4];
	279	unsigned int save_vr27[4];
	280	unsigned int save_vr28[4];
	281	unsigned int save_vr29[4];
	282	unsigned int save_vr30[4];
	283	unsigned int save_vr31[4];
	284
	285	/* offset 0x280 */
	286	} savearea_vec;
55e303ae	287	#pragma pack()
9bccf70c A	288	#endif /* MACH_KERNEL_PRIVATE \|\| BSD_KERNEL_PRIVATE */
	289
	290	#ifdef MACH_KERNEL_PRIVATE
	291
55e303ae	292	#pragma pack(4) /* Make sure the structure stays as we defined it */
9bccf70c A	293	struct Saveanchor {
	294
	295	/*
	296	* Note that this force aligned in aligned_data.s and must be in V=R storage.
	297	* Also, all addresses in chains are physical. This structure can only be
	298	* updated with translation and interrupts disabled. This is because it is
	299	* locked during exception processing and if we were to take a PTE miss while the
	300	* lock were held, well, that would be very bad now wouldn't it?
55e303ae	301	* Note that the first 24 bytes must be the same format as a savearea header.
9bccf70c A	302	*/
9bccf70c A	303
55e303ae A	304	unsigned int savelock; /* 000 Lock word for savearea free list manipulation */
	305	int saveRSVD4; /* 004 reserved */
	306	addr64_t savepoolfwd; /* 008 Forward anchor for the free pool */
	307	addr64_t savepoolbwd; /* 010 Backward anchor for the free pool */
	308	volatile addr64_t savefree; /* 018 Anchor for the global free list */
	309	volatile unsigned int savefreecnt; /* 020 Number of saveareas on global free list */
	310	volatile int saveadjust; /* 024 If 0 number of saveareas is ok, otherwise # to change (pos means grow, neg means shrink */
	311	volatile int saveinuse; /* 028 Number of areas in use counting those on the local free list */
	312	volatile int savetarget; /* 02C Number of savearea's needed */
	313	int savemaxcount; /* 030 Maximum saveareas ever allocated */
	314	unsigned int saveRSVD034[3]; /* 034 reserved */
	315	/* 040 */
9bccf70c A	316
9bccf70c A	317	};
55e303ae	318	#pragma pack()
9bccf70c A	319
	320
	321	#define sac_cnt (4096 / sizeof(savearea)) /* Number of saveareas per page */
	322	#define sac_empty (0xFFFFFFFF << (32 - sac_cnt)) /* Mask with all entries empty */
	323	#define sac_perm 0x40000000 /* Page permanently assigned */
	324	#define sac_permb 1 /* Page permanently assigned - bit position */
	325
	326	#define LocalSaveTarget (((8 + sac_cnt - 1) / sac_cnt) * sac_cnt) /* Target for size of local savearea free list */
	327	#define LocalSaveMin (LocalSaveTarget / 2) /* Min size of local savearea free list before we grow */
	328	#define LocalSaveMax (LocalSaveTarget * 2) /* Max size of local savearea free list before we trim */
	329
	330	#define FreeListMin (2 * LocalSaveTarget * NCPUS) /* Always make sure there are enough to fill local list twice per processor */
	331	#define SaveLowHysteresis LocalSaveTarget /* The number off from target before we adjust upwards */
	332	#define SaveHighHysteresis FreeListMin /* The number off from target before we adjust downwards */
	333	#define InitialSaveAreas (2 * FreeListMin) /* The number of saveareas to make at boot time */
	334	#define InitialSaveTarget FreeListMin /* The number of saveareas for an initial target. This should be the minimum ever needed. */
	335	#define InitialSaveBloks (InitialSaveAreas + sac_cnt - 1) / sac_cnt /* The number of savearea blocks to allocate at boot */
55e303ae A	336	#define BackPocketSaveBloks 8 /* Number of pages of back pocket saveareas */
	337
	338	void save_queue(ppnum_t); /* Add a new savearea block to the free list */
	339	addr64_t save_get_init(void); /* special savearea-get for cpu initialization (returns physical address) */
	340	struct savearea save_get(void); / Obtains a savearea from the free list (returns virtual address) */
	341	reg64_t save_get_phys_32(void); /* Obtains a savearea from the free list (returns phys addr in r3) */
	342	reg64_t save_get_phys_64(void); /* Obtains a savearea from the free list (returns phys addr in r3) */
	343	struct savearea save_alloc(void); / Obtains a savearea and allocates blocks if needed */
	344	struct savearea save_cpv(addr64_t); / Converts a physical savearea address to virtual */
	345	void save_ret(struct savearea ); / Returns a savearea to the free list by virtual address */
	346	void save_ret_wMSR(struct savearea , reg64_t); / returns a savearea and restores an MSR */
	347	void save_ret_phys(reg64_t); /* Returns a savearea to the free list by physical address */
	348	void save_adjust(void); /* Adjust size of the global free list */
	349	struct savearea_comm save_trim_free(void); / Remove free pages from savearea pool */
	350	int save_recover(void); /* returns nonzero if we can recover enough from the free pool */
	351	void savearea_init(vm_offset_t addr); /* Boot-time savearea initialization */
9bccf70c A	352
9bccf70c A	353
9bccf70c A	354	#endif /* MACH_KERNEL_PRIVATE */
	355	#endif /* __APPLE_API_PRIVATE */
	356
	357	#endif /* ndef ASSEMBLER */
1c79356b	358
9bccf70c A	359	#define SAVattach 0x80000000 /* Savearea has valid context */
	360	#define SAVrststk 0x00010000 /* Indicates that the current stack should be reset to empty */
	361	#define SAVsyscall 0x00020000 /* Indicates that the savearea is associated with a syscall */
	362	#define SAVredrive 0x00040000 /* Indicates that the low-level fault handler associated */
55e303ae A	363	#define SAVredriveb 13 /* Indicates that the low-level fault handler associated */
	364	#define SAVinstrument 0x00080000 /* Indicates that we should return instrumentation data */
	365	#define SAVinstrumentb 12 /* Indicates that we should return instrumentation data */
a3d08fcd A	366	#define SAVeat 0x00100000 /* Indicates that interruption should be ignored */
a3d08fcd A	367	#define SAVeatb 11 /* Indicates that interruption should be ignored */
9bccf70c A	368	#define SAVtype 0x0000FF00 /* Shows type of savearea */
	369	#define SAVtypeshft 8 /* Shift to position type */
	370	#define SAVempty 0x86 /* Savearea is on free list */
	371	#define SAVgeneral 0x01 /* Savearea contains general context */
	372	#define SAVfloat 0x02 /* Savearea contains floating point context */
	373	#define SAVvector 0x03 /* Savearea contains vector context */
1c79356b	374
55e303ae A	375
55e303ae A	376
9bccf70c	377	#endif /* _PPC_SAVEAREA_H_ */