[mirror_ubuntu-artful-kernel.git] / arch / powerpc / include / asm / processor.h

#ifndef _ASM_POWERPC_PROCESSOR_H
#define _ASM_POWERPC_PROCESSOR_H

/*
 * Copyright (C) 2001 PPC 64 Team, IBM Corp
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#include <asm/reg.h>

#ifdef CONFIG_VSX
#define TS_FPRWIDTH 2
#else
#define TS_FPRWIDTH 1
#endif

#ifndef __ASSEMBLY__
#include <linux/compiler.h>
#include <asm/ptrace.h>
#include <asm/types.h>

/* We do _not_ want to define new machine types at all, those must die
 * in favor of using the device-tree
 * -- BenH.
 */

/* PREP sub-platform types see residual.h for these */
#define _PREP_Motorola	0x01	/* motorola prep */
#define _PREP_Firm	0x02	/* firmworks prep */
#define _PREP_IBM	0x00	/* ibm prep */
#define _PREP_Bull	0x03	/* bull prep */

/* CHRP sub-platform types. These are arbitrary */
#define _CHRP_Motorola	0x04	/* motorola chrp, the cobra */
#define _CHRP_IBM	0x05	/* IBM chrp, the longtrail and longtrail 2 */
#define _CHRP_Pegasos	0x06	/* Genesi/bplan's Pegasos and Pegasos2 */
#define _CHRP_briq	0x07	/* TotalImpact's briQ */

#if defined(__KERNEL__) && defined(CONFIG_PPC32)

extern int _chrp_type;

#ifdef CONFIG_PPC_PREP

/* what kind of prep workstation we are */
extern int _prep_type;

#endif /* CONFIG_PPC_PREP */

#endif /* defined(__KERNEL__) && defined(CONFIG_PPC32) */

/*
 * Default implementation of macro that returns current
 * instruction pointer ("program counter").
 */
#define current_text_addr() ({ __label__ _l; _l: &&_l;})

/* Macros for adjusting thread priority (hardware multi-threading) */
#define HMT_very_low()   asm volatile("or 31,31,31   # very low priority")
#define HMT_low()	 asm volatile("or 1,1,1	     # low priority")
#define HMT_medium_low() asm volatile("or 6,6,6      # medium low priority")
#define HMT_medium()	 asm volatile("or 2,2,2	     # medium priority")
#define HMT_medium_high() asm volatile("or 5,5,5      # medium high priority")
#define HMT_high()	 asm volatile("or 3,3,3	     # high priority")

#ifdef __KERNEL__

struct task_struct;
void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp);
void release_thread(struct task_struct *);

/* Prepare to copy thread state - unlazy all lazy status */
extern void prepare_to_copy(struct task_struct *tsk);

/* Create a new kernel thread. */
extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);

/* Lazy FPU handling on uni-processor */
extern struct task_struct *last_task_used_math;
extern struct task_struct *last_task_used_altivec;
extern struct task_struct *last_task_used_vsx;
extern struct task_struct *last_task_used_spe;

#ifdef CONFIG_PPC32

#if CONFIG_TASK_SIZE > CONFIG_KERNEL_START
#error User TASK_SIZE overlaps with KERNEL_START address
#endif
#define TASK_SIZE	(CONFIG_TASK_SIZE)

/* This decides where the kernel will search for a free chunk of vm
 * space during mmap's.
 */
#define TASK_UNMAPPED_BASE	(TASK_SIZE / 8 * 3)
#endif

#ifdef CONFIG_PPC64
/* 64-bit user address space is 44-bits (16TB user VM) */
#define TASK_SIZE_USER64 (0x0000100000000000UL)

/* 
 * 32-bit user address space is 4GB - 1 page 
 * (this 1 page is needed so referencing of 0xFFFFFFFF generates EFAULT
 */
#define TASK_SIZE_USER32 (0x0000000100000000UL - (1*PAGE_SIZE))

#define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_32BIT) ? \
		TASK_SIZE_USER32 : TASK_SIZE_USER64)
#define TASK_SIZE	  TASK_SIZE_OF(current)

/* This decides where the kernel will search for a free chunk of vm
 * space during mmap's.
 */
#define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(TASK_SIZE_USER32 / 4))
#define TASK_UNMAPPED_BASE_USER64 (PAGE_ALIGN(TASK_SIZE_USER64 / 4))

#define TASK_UNMAPPED_BASE ((test_thread_flag(TIF_32BIT)) ? \
		TASK_UNMAPPED_BASE_USER32 : TASK_UNMAPPED_BASE_USER64 )
#endif

#ifdef __KERNEL__
#ifdef __powerpc64__

#define STACK_TOP_USER64 TASK_SIZE_USER64
#define STACK_TOP_USER32 TASK_SIZE_USER32

#define STACK_TOP (test_thread_flag(TIF_32BIT) ? \
		   STACK_TOP_USER32 : STACK_TOP_USER64)

#define STACK_TOP_MAX STACK_TOP_USER64

#else /* __powerpc64__ */

#define STACK_TOP TASK_SIZE
#define STACK_TOP_MAX	STACK_TOP

#endif /* __powerpc64__ */
#endif /* __KERNEL__ */

typedef struct {
	unsigned long seg;
} mm_segment_t;

#define TS_FPROFFSET 0
#define TS_VSRLOWOFFSET 1
#define TS_FPR(i) fpr[i][TS_FPROFFSET]

struct thread_struct {
	unsigned long	ksp;		/* Kernel stack pointer */
	unsigned long	ksp_limit;	/* if ksp <= ksp_limit stack overflow */

#ifdef CONFIG_PPC64
	unsigned long	ksp_vsid;
#endif
	struct pt_regs	*regs;		/* Pointer to saved register state */
	mm_segment_t	fs;		/* for get_fs() validation */
#ifdef CONFIG_PPC32
	void		*pgdir;		/* root of page-table tree */
#endif
#if defined(CONFIG_4xx) || defined (CONFIG_BOOKE)
	unsigned long	dbcr0;		/* debug control register values */
	unsigned long	dbcr1;
#endif
	/* FP and VSX 0-31 register set */
	double		fpr[32][TS_FPRWIDTH];
	struct {

		unsigned int pad;
		unsigned int val;	/* Floating point status */
	} fpscr;
	int		fpexc_mode;	/* floating-point exception mode */
	unsigned int	align_ctl;	/* alignment handling control */
#ifdef CONFIG_PPC64
	unsigned long	start_tb;	/* Start purr when proc switched in */
	unsigned long	accum_tb;	/* Total accumilated purr for process */
#endif
	unsigned long	dabr;		/* Data address breakpoint register */
#ifdef CONFIG_ALTIVEC
	/* Complete AltiVec register set */
	vector128	vr[32] __attribute__((aligned(16)));
	/* AltiVec status */
	vector128	vscr __attribute__((aligned(16)));
	unsigned long	vrsave;
	int		used_vr;	/* set if process has used altivec */
#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_VSX
	/* VSR status */
	int		used_vsr;	/* set if process has used altivec */
#endif /* CONFIG_VSX */
#ifdef CONFIG_SPE
	unsigned long	evr[32];	/* upper 32-bits of SPE regs */
	u64		acc;		/* Accumulator */
	unsigned long	spefscr;	/* SPE & eFP status */
	int		used_spe;	/* set if process has used spe */
#endif /* CONFIG_SPE */
};

#define ARCH_MIN_TASKALIGN 16

#define INIT_SP		(sizeof(init_stack) + (unsigned long) &init_stack)
#define INIT_SP_LIMIT \
	(_ALIGN_UP(sizeof(init_thread_info), 16) + (unsigned long) &init_stack)

#ifdef CONFIG_SPE
#define SPEFSCR_INIT .spefscr = SPEFSCR_FINVE | SPEFSCR_FDBZE | SPEFSCR_FUNFE | SPEFSCR_FOVFE,
#else
#define SPEFSCR_INIT
#endif

#ifdef CONFIG_PPC32
#define INIT_THREAD { \
	.ksp = INIT_SP, \
	.ksp_limit = INIT_SP_LIMIT, \
	.fs = KERNEL_DS, \
	.pgdir = swapper_pg_dir, \
	.fpexc_mode = MSR_FE0 | MSR_FE1, \
	SPEFSCR_INIT \
}
#else
#define INIT_THREAD  { \
	.ksp = INIT_SP, \
	.ksp_limit = INIT_SP_LIMIT, \
	.regs = (struct pt_regs *)INIT_SP - 1, /* XXX bogus, I think */ \
	.fs = KERNEL_DS, \
	.fpr = {{0}}, \
	.fpscr = { .val = 0, }, \
	.fpexc_mode = 0, \
}
#endif

/*
 * Return saved PC of a blocked thread. For now, this is the "user" PC
 */
#define thread_saved_pc(tsk)    \
        ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)

#define task_pt_regs(tsk)	((struct pt_regs *)(tsk)->thread.regs)

unsigned long get_wchan(struct task_struct *p);

#define KSTK_EIP(tsk)  ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)
#define KSTK_ESP(tsk)  ((tsk)->thread.regs? (tsk)->thread.regs->gpr[1]: 0)

/* Get/set floating-point exception mode */
#define GET_FPEXC_CTL(tsk, adr) get_fpexc_mode((tsk), (adr))
#define SET_FPEXC_CTL(tsk, val) set_fpexc_mode((tsk), (val))

extern int get_fpexc_mode(struct task_struct *tsk, unsigned long adr);
extern int set_fpexc_mode(struct task_struct *tsk, unsigned int val);

#define GET_ENDIAN(tsk, adr) get_endian((tsk), (adr))
#define SET_ENDIAN(tsk, val) set_endian((tsk), (val))

extern int get_endian(struct task_struct *tsk, unsigned long adr);
extern int set_endian(struct task_struct *tsk, unsigned int val);

#define GET_UNALIGN_CTL(tsk, adr)	get_unalign_ctl((tsk), (adr))
#define SET_UNALIGN_CTL(tsk, val)	set_unalign_ctl((tsk), (val))

extern int get_unalign_ctl(struct task_struct *tsk, unsigned long adr);
extern int set_unalign_ctl(struct task_struct *tsk, unsigned int val);

static inline unsigned int __unpack_fe01(unsigned long msr_bits)
{
	return ((msr_bits & MSR_FE0) >> 10) | ((msr_bits & MSR_FE1) >> 8);
}

static inline unsigned long __pack_fe01(unsigned int fpmode)
{
	return ((fpmode << 10) & MSR_FE0) | ((fpmode << 8) & MSR_FE1);
}

#ifdef CONFIG_PPC64
#define cpu_relax()	do { HMT_low(); HMT_medium(); barrier(); } while (0)
#else
#define cpu_relax()	barrier()
#endif

/* Check that a certain kernel stack pointer is valid in task_struct p */
int validate_sp(unsigned long sp, struct task_struct *p,
                       unsigned long nbytes);

/*
 * Prefetch macros.
 */
#define ARCH_HAS_PREFETCH
#define ARCH_HAS_PREFETCHW
#define ARCH_HAS_SPINLOCK_PREFETCH

static inline void prefetch(const void *x)
{
	if (unlikely(!x))
		return;

	__asm__ __volatile__ ("dcbt 0,%0" : : "r" (x));
}

static inline void prefetchw(const void *x)
{
	if (unlikely(!x))
		return;

	__asm__ __volatile__ ("dcbtst 0,%0" : : "r" (x));
}

#define spin_lock_prefetch(x)	prefetchw(x)

#ifdef CONFIG_PPC64
#define HAVE_ARCH_PICK_MMAP_LAYOUT
#endif

#ifdef CONFIG_PPC64
static inline unsigned long get_clean_sp(struct pt_regs *regs, int is_32)
{
	unsigned long sp;

	if (is_32)
		sp = regs->gpr[1] & 0x0ffffffffUL;
	else
		sp = regs->gpr[1];

	return sp;
}
#else
static inline unsigned long get_clean_sp(struct pt_regs *regs, int is_32)
{
	return regs->gpr[1];
}
#endif

#endif /* __KERNEL__ */
#endif /* __ASSEMBLY__ */
#endif /* _ASM_POWERPC_PROCESSOR_H */
Commit	Line	Data
9f04b9e3 PM	1	#ifndef _ASM_POWERPC_PROCESSOR_H
9f04b9e3 PM	2	#define _ASM_POWERPC_PROCESSOR_H
1da177e4 LT	3
1da177e4 LT	4	/*
9f04b9e3 PM	5	* Copyright (C) 2001 PPC 64 Team, IBM Corp
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License
	9	* as published by the Free Software Foundation; either version
	10	* 2 of the License, or (at your option) any later version.
1da177e4	11	*/
1da177e4	12
9f04b9e3	13	#include <asm/reg.h>
1da177e4	14
c6e6771b MN	15	#ifdef CONFIG_VSX
	16	#define TS_FPRWIDTH 2
	17	#else
9c75a31c	18	#define TS_FPRWIDTH 1
c6e6771b	19	#endif
9c75a31c	20
9f04b9e3 PM	21	#ifndef __ASSEMBLY__
9f04b9e3 PM	22	#include <linux/compiler.h>
1da177e4 LT	23	#include <asm/ptrace.h>
1da177e4 LT	24	#include <asm/types.h>
1da177e4	25
799d6046 PM	26	/* We do _not_ want to define new machine types at all, those must die
	27	* in favor of using the device-tree
	28	* -- BenH.
1da177e4	29	*/
1da177e4	30
799d6046	31	/* PREP sub-platform types see residual.h for these */
1da177e4 LT	32	#define _PREP_Motorola 0x01 /* motorola prep */
	33	#define _PREP_Firm 0x02 /* firmworks prep */
	34	#define _PREP_IBM 0x00 /* ibm prep */
	35	#define _PREP_Bull 0x03 /* bull prep */
	36
799d6046	37	/* CHRP sub-platform types. These are arbitrary */
1da177e4 LT	38	#define _CHRP_Motorola 0x04 /* motorola chrp, the cobra */
	39	#define _CHRP_IBM 0x05 /* IBM chrp, the longtrail and longtrail 2 */
	40	#define _CHRP_Pegasos 0x06 /* Genesi/bplan's Pegasos and Pegasos2 */
26c5032e	41	#define _CHRP_briq 0x07 /* TotalImpact's briQ */
1da177e4	42
e8222502 BH	43	#if defined(__KERNEL__) && defined(CONFIG_PPC32)
	44
	45	extern int _chrp_type;
799d6046	46
0a26b136	47	#ifdef CONFIG_PPC_PREP
799d6046	48
1da177e4 LT	49	/* what kind of prep workstation we are */
1da177e4 LT	50	extern int _prep_type;
1da177e4	51
0a26b136 PM	52	#endif /* CONFIG_PPC_PREP */
0a26b136 PM	53
e8222502 BH	54	#endif /* defined(__KERNEL__) && defined(CONFIG_PPC32) */
e8222502 BH	55
9f04b9e3 PM	56	/*
	57	* Default implementation of macro that returns current
	58	* instruction pointer ("program counter").
	59	*/
	60	#define current_text_addr() ({ __label__ _l; _l: &&_l;})
	61
	62	/* Macros for adjusting thread priority (hardware multi-threading) */
	63	#define HMT_very_low() asm volatile("or 31,31,31 # very low priority")
	64	#define HMT_low() asm volatile("or 1,1,1 # low priority")
	65	#define HMT_medium_low() asm volatile("or 6,6,6 # medium low priority")
	66	#define HMT_medium() asm volatile("or 2,2,2 # medium priority")
	67	#define HMT_medium_high() asm volatile("or 5,5,5 # medium high priority")
	68	#define HMT_high() asm volatile("or 3,3,3 # high priority")
	69
	70	#ifdef __KERNEL__
	71
1da177e4	72	struct task_struct;
9f04b9e3	73	void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp);
1da177e4 LT	74	void release_thread(struct task_struct *);
	75
	76	/* Prepare to copy thread state - unlazy all lazy status */
	77	extern void prepare_to_copy(struct task_struct *tsk);
	78
9f04b9e3	79	/* Create a new kernel thread. */
1da177e4 LT	80	extern long kernel_thread(int (fn)(void ), void *arg, unsigned long flags);
	81
	82	/* Lazy FPU handling on uni-processor */
	83	extern struct task_struct *last_task_used_math;
	84	extern struct task_struct *last_task_used_altivec;
c6e6771b	85	extern struct task_struct *last_task_used_vsx;
1da177e4 LT	86	extern struct task_struct *last_task_used_spe;
1da177e4 LT	87
9f04b9e3	88	#ifdef CONFIG_PPC32
7c4f10b9 RT	89
	90	#if CONFIG_TASK_SIZE > CONFIG_KERNEL_START
	91	#error User TASK_SIZE overlaps with KERNEL_START address
	92	#endif
9f04b9e3 PM	93	#define TASK_SIZE (CONFIG_TASK_SIZE)
9f04b9e3 PM	94
1da177e4 LT	95	/* This decides where the kernel will search for a free chunk of vm
	96	* space during mmap's.
	97	*/
	98	#define TASK_UNMAPPED_BASE (TASK_SIZE / 8 * 3)
9f04b9e3 PM	99	#endif
	100
	101	#ifdef CONFIG_PPC64
	102	/* 64-bit user address space is 44-bits (16TB user VM) */
	103	#define TASK_SIZE_USER64 (0x0000100000000000UL)
	104
	105	/*
	106	* 32-bit user address space is 4GB - 1 page
	107	* (this 1 page is needed so referencing of 0xFFFFFFFF generates EFAULT
	108	*/
	109	#define TASK_SIZE_USER32 (0x0000000100000000UL - (1*PAGE_SIZE))
	110
82455257	111	#define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_32BIT) ? \
9f04b9e3	112	TASK_SIZE_USER32 : TASK_SIZE_USER64)
82455257	113	#define TASK_SIZE TASK_SIZE_OF(current)
9f04b9e3 PM	114
	115	/* This decides where the kernel will search for a free chunk of vm
	116	* space during mmap's.
	117	*/
	118	#define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(TASK_SIZE_USER32 / 4))
	119	#define TASK_UNMAPPED_BASE_USER64 (PAGE_ALIGN(TASK_SIZE_USER64 / 4))
	120
	121	#define TASK_UNMAPPED_BASE ((test_thread_flag(TIF_32BIT)) ? \
	122	TASK_UNMAPPED_BASE_USER32 : TASK_UNMAPPED_BASE_USER64 )
	123	#endif
1da177e4	124
922a70d3 DH	125	#ifdef __KERNEL__
	126	#ifdef __powerpc64__
	127
	128	#define STACK_TOP_USER64 TASK_SIZE_USER64
	129	#define STACK_TOP_USER32 TASK_SIZE_USER32
	130
	131	#define STACK_TOP (test_thread_flag(TIF_32BIT) ? \
	132	STACK_TOP_USER32 : STACK_TOP_USER64)
	133
	134	#define STACK_TOP_MAX STACK_TOP_USER64
	135
	136	#else /* __powerpc64__ */
	137
	138	#define STACK_TOP TASK_SIZE
	139	#define STACK_TOP_MAX STACK_TOP
	140
	141	#endif /* __powerpc64__ */
	142	#endif /* __KERNEL__ */
	143
1da177e4 LT	144	typedef struct {
	145	unsigned long seg;
	146	} mm_segment_t;
	147
c6e6771b MN	148	#define TS_FPROFFSET 0
	149	#define TS_VSRLOWOFFSET 1
	150	#define TS_FPR(i) fpr[i][TS_FPROFFSET]
9c75a31c	151
1da177e4 LT	152	struct thread_struct {
1da177e4 LT	153	unsigned long ksp; /* Kernel stack pointer */
85218827 KG	154	unsigned long ksp_limit; /* if ksp <= ksp_limit stack overflow */
85218827 KG	155
9f04b9e3 PM	156	#ifdef CONFIG_PPC64
	157	unsigned long ksp_vsid;
	158	#endif
1da177e4 LT	159	struct pt_regs regs; / Pointer to saved register state */
1da177e4 LT	160	mm_segment_t fs; /* for get_fs() validation */
9f04b9e3	161	#ifdef CONFIG_PPC32
1da177e4	162	void pgdir; / root of page-table tree */
9f04b9e3	163	#endif
1da177e4 LT	164	#if defined(CONFIG_4xx) \|\| defined (CONFIG_BOOKE)
	165	unsigned long dbcr0; /* debug control register values */
	166	unsigned long dbcr1;
	167	#endif
c6e6771b MN	168	/* FP and VSX 0-31 register set */
	169	double fpr[32][TS_FPRWIDTH];
	170	struct {
25c8a78b DG	171
	172	unsigned int pad;
	173	unsigned int val; /* Floating point status */
	174	} fpscr;
9f04b9e3	175	int fpexc_mode; /* floating-point exception mode */
e9370ae1	176	unsigned int align_ctl; /* alignment handling control */
9f04b9e3 PM	177	#ifdef CONFIG_PPC64
	178	unsigned long start_tb; /* Start purr when proc switched in */
	179	unsigned long accum_tb; /* Total accumilated purr for process */
9f04b9e3 PM	180	#endif
9f04b9e3 PM	181	unsigned long dabr; /* Data address breakpoint register */
1da177e4 LT	182	#ifdef CONFIG_ALTIVEC
1da177e4 LT	183	/* Complete AltiVec register set */
fc624eae	184	vector128 vr[32] __attribute__((aligned(16)));
1da177e4	185	/* AltiVec status */
fc624eae	186	vector128 vscr __attribute__((aligned(16)));
1da177e4 LT	187	unsigned long vrsave;
	188	int used_vr; /* set if process has used altivec */
	189	#endif /* CONFIG_ALTIVEC */
c6e6771b MN	190	#ifdef CONFIG_VSX
	191	/* VSR status */
	192	int used_vsr; /* set if process has used altivec */
	193	#endif /* CONFIG_VSX */
1da177e4 LT	194	#ifdef CONFIG_SPE
	195	unsigned long evr[32]; /* upper 32-bits of SPE regs */
	196	u64 acc; /* Accumulator */
	197	unsigned long spefscr; /* SPE & eFP status */
	198	int used_spe; /* set if process has used spe */
	199	#endif /* CONFIG_SPE */
	200	};
	201
	202	#define ARCH_MIN_TASKALIGN 16
	203
	204	#define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack)
85218827 KG	205	#define INIT_SP_LIMIT \
85218827 KG	206	(_ALIGN_UP(sizeof(init_thread_info), 16) + (unsigned long) &init_stack)
1da177e4	207
6a800f36 LY	208	#ifdef CONFIG_SPE
	209	#define SPEFSCR_INIT .spefscr = SPEFSCR_FINVE \| SPEFSCR_FDBZE \| SPEFSCR_FUNFE \| SPEFSCR_FOVFE,
	210	#else
	211	#define SPEFSCR_INIT
	212	#endif
9f04b9e3 PM	213
9f04b9e3 PM	214	#ifdef CONFIG_PPC32
1da177e4 LT	215	#define INIT_THREAD { \
1da177e4 LT	216	.ksp = INIT_SP, \
85218827	217	.ksp_limit = INIT_SP_LIMIT, \
1da177e4 LT	218	.fs = KERNEL_DS, \
	219	.pgdir = swapper_pg_dir, \
	220	.fpexc_mode = MSR_FE0 \| MSR_FE1, \
6a800f36	221	SPEFSCR_INIT \
1da177e4	222	}
9f04b9e3 PM	223	#else
	224	#define INIT_THREAD { \
	225	.ksp = INIT_SP, \
85218827	226	.ksp_limit = INIT_SP_LIMIT, \
9f04b9e3 PM	227	.regs = (struct pt_regs )INIT_SP - 1, / XXX bogus, I think */ \
9f04b9e3 PM	228	.fs = KERNEL_DS, \
e17a2565	229	.fpr = {{0}}, \
25c8a78b	230	.fpscr = { .val = 0, }, \
ddf5f75a	231	.fpexc_mode = 0, \
9f04b9e3 PM	232	}
9f04b9e3 PM	233	#endif
1da177e4 LT	234
	235	/*
	236	* Return saved PC of a blocked thread. For now, this is the "user" PC
	237	*/
9f04b9e3 PM	238	#define thread_saved_pc(tsk) \
9f04b9e3 PM	239	((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)
1da177e4	240
e5093ff0 SD	241	#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.regs)
e5093ff0 SD	242
1da177e4 LT	243	unsigned long get_wchan(struct task_struct *p);
1da177e4 LT	244
9f04b9e3 PM	245	#define KSTK_EIP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)
9f04b9e3 PM	246	#define KSTK_ESP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->gpr[1]: 0)
1da177e4 LT	247
1da177e4 LT	248	/* Get/set floating-point exception mode */
9f04b9e3 PM	249	#define GET_FPEXC_CTL(tsk, adr) get_fpexc_mode((tsk), (adr))
9f04b9e3 PM	250	#define SET_FPEXC_CTL(tsk, val) set_fpexc_mode((tsk), (val))
1da177e4 LT	251
	252	extern int get_fpexc_mode(struct task_struct *tsk, unsigned long adr);
	253	extern int set_fpexc_mode(struct task_struct *tsk, unsigned int val);
	254
fab5db97 PM	255	#define GET_ENDIAN(tsk, adr) get_endian((tsk), (adr))
	256	#define SET_ENDIAN(tsk, val) set_endian((tsk), (val))
	257
	258	extern int get_endian(struct task_struct *tsk, unsigned long adr);
	259	extern int set_endian(struct task_struct *tsk, unsigned int val);
	260
e9370ae1 PM	261	#define GET_UNALIGN_CTL(tsk, adr) get_unalign_ctl((tsk), (adr))
	262	#define SET_UNALIGN_CTL(tsk, val) set_unalign_ctl((tsk), (val))
	263
	264	extern int get_unalign_ctl(struct task_struct *tsk, unsigned long adr);
	265	extern int set_unalign_ctl(struct task_struct *tsk, unsigned int val);
	266
9f04b9e3	267	static inline unsigned int __unpack_fe01(unsigned long msr_bits)
1da177e4 LT	268	{
	269	return ((msr_bits & MSR_FE0) >> 10) \| ((msr_bits & MSR_FE1) >> 8);
	270	}
	271
9f04b9e3	272	static inline unsigned long __pack_fe01(unsigned int fpmode)
1da177e4 LT	273	{
	274	return ((fpmode << 10) & MSR_FE0) \| ((fpmode << 8) & MSR_FE1);
	275	}
	276
9f04b9e3 PM	277	#ifdef CONFIG_PPC64
	278	#define cpu_relax() do { HMT_low(); HMT_medium(); barrier(); } while (0)
	279	#else
1da177e4	280	#define cpu_relax() barrier()
9f04b9e3	281	#endif
1da177e4	282
2f25194d AB	283	/* Check that a certain kernel stack pointer is valid in task_struct p */
	284	int validate_sp(unsigned long sp, struct task_struct *p,
	285	unsigned long nbytes);
	286
1da177e4 LT	287	/*
	288	* Prefetch macros.
	289	*/
	290	#define ARCH_HAS_PREFETCH
	291	#define ARCH_HAS_PREFETCHW
	292	#define ARCH_HAS_SPINLOCK_PREFETCH
	293
9f04b9e3	294	static inline void prefetch(const void *x)
1da177e4	295	{
9f04b9e3 PM	296	if (unlikely(!x))
	297	return;
	298
	299	__asm__ __volatile__ ("dcbt 0,%0" : : "r" (x));
1da177e4 LT	300	}
1da177e4 LT	301
9f04b9e3	302	static inline void prefetchw(const void *x)
1da177e4	303	{
9f04b9e3 PM	304	if (unlikely(!x))
	305	return;
	306
	307	__asm__ __volatile__ ("dcbtst 0,%0" : : "r" (x));
1da177e4 LT	308	}
	309
	310	#define spin_lock_prefetch(x) prefetchw(x)
	311
9f04b9e3 PM	312	#ifdef CONFIG_PPC64
	313	#define HAVE_ARCH_PICK_MMAP_LAYOUT
	314	#endif
1da177e4	315
efbda860 JB	316	#ifdef CONFIG_PPC64
	317	static inline unsigned long get_clean_sp(struct pt_regs *regs, int is_32)
	318	{
	319	unsigned long sp;
	320
	321	if (is_32)
	322	sp = regs->gpr[1] & 0x0ffffffffUL;
	323	else
	324	sp = regs->gpr[1];
	325
	326	return sp;
	327	}
	328	#else
	329	static inline unsigned long get_clean_sp(struct pt_regs *regs, int is_32)
	330	{
	331	return regs->gpr[1];
	332	}
	333	#endif
	334
1da177e4	335	#endif /* __KERNEL__ */
9f04b9e3 PM	336	#endif /* __ASSEMBLY__ */
9f04b9e3 PM	337	#endif /* _ASM_POWERPC_PROCESSOR_H */