[deliverable/linux.git] / include / asm-sh / processor_64.h

#ifndef __ASM_SH_PROCESSOR_64_H
#define __ASM_SH_PROCESSOR_64_H

/*
 * include/asm-sh/processor_64.h
 *
 * Copyright (C) 2000, 2001  Paolo Alberelli
 * Copyright (C) 2003  Paul Mundt
 * Copyright (C) 2004  Richard Curnow
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */
#ifndef __ASSEMBLY__

#include <linux/compiler.h>
#include <asm/page.h>
#include <asm/types.h>
#include <asm/cache.h>
#include <asm/ptrace.h>
#include <asm/cpu/registers.h>

/*
 * Default implementation of macro that returns current
 * instruction pointer ("program counter").
 */
#define current_text_addr() ({ \
void *pc; \
unsigned long long __dummy = 0; \
__asm__("gettr	tr0, %1\n\t" \
	"pta	4, tr0\n\t" \
	"gettr	tr0, %0\n\t" \
	"ptabs	%1, tr0\n\t"	\
	:"=r" (pc), "=r" (__dummy) \
	: "1" (__dummy)); \
pc; })

/*
 * TLB information structure
 *
 * Defined for both I and D tlb, per-processor.
 */
struct tlb_info {
	unsigned long long next;
	unsigned long long first;
	unsigned long long last;

	unsigned int entries;
	unsigned int step;

	unsigned long flags;
};

struct sh_cpuinfo {
	enum cpu_type type;
	unsigned long loops_per_jiffy;
	unsigned long asid_cache;

	unsigned int cpu_clock, master_clock, bus_clock, module_clock;

	/* Cache info */
	struct cache_info icache;
	struct cache_info dcache;
	struct cache_info scache;

	/* TLB info */
	struct tlb_info itlb;
	struct tlb_info dtlb;

	unsigned long flags;
};

extern struct sh_cpuinfo cpu_data[];
#define boot_cpu_data cpu_data[0]
#define current_cpu_data cpu_data[smp_processor_id()]
#define raw_current_cpu_data cpu_data[raw_smp_processor_id()]

#endif

/*
 * User space process size: 2GB - 4k.
 */
#define TASK_SIZE	0x7ffff000UL

#define STACK_TOP	TASK_SIZE
#define STACK_TOP_MAX	STACK_TOP

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

/*
 * Bit of SR register
 *
 * FD-bit:
 *     When it's set, it means the processor doesn't have right to use FPU,
 *     and it results exception when the floating operation is executed.
 *
 * IMASK-bit:
 *     Interrupt level mask
 *
 * STEP-bit:
 *     Single step bit
 *
 */
#if defined(CONFIG_SH64_SR_WATCH)
#define SR_MMU   0x84000000
#else
#define SR_MMU   0x80000000
#endif

#define SR_IMASK 0x000000f0
#define SR_FD    0x00008000
#define SR_SSTEP 0x08000000

#ifndef __ASSEMBLY__

/*
 * FPU structure and data : require 8-byte alignment as we need to access it
   with fld.p, fst.p
 */

struct sh_fpu_hard_struct {
	unsigned long fp_regs[64];
	unsigned int fpscr;
	/* long status; * software status information */
};

#if 0
/* Dummy fpu emulator  */
struct sh_fpu_soft_struct {
	unsigned long long fp_regs[32];
	unsigned int fpscr;
	unsigned char lookahead;
	unsigned long entry_pc;
};
#endif

union sh_fpu_union {
	struct sh_fpu_hard_struct hard;
	/* 'hard' itself only produces 32 bit alignment, yet we need
	   to access it using 64 bit load/store as well. */
	unsigned long long alignment_dummy;
};

struct thread_struct {
	unsigned long sp;
	unsigned long pc;
	/* This stores the address of the pt_regs built during a context
	   switch, or of the register save area built for a kernel mode
	   exception.  It is used for backtracing the stack of a sleeping task
	   or one that traps in kernel mode. */
        struct pt_regs *kregs;
	/* This stores the address of the pt_regs constructed on entry from
	   user mode.  It is a fixed value over the lifetime of a process, or
	   NULL for a kernel thread. */
	struct pt_regs *uregs;

	unsigned long trap_no, error_code;
	unsigned long address;
	/* Hardware debugging registers may come here */

	/* floating point info */
	union sh_fpu_union fpu;
};

typedef struct {
	unsigned long seg;
} mm_segment_t;

#define INIT_MMAP \
{ &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }

extern  struct pt_regs fake_swapper_regs;

#define INIT_THREAD  {				\
	.sp		= sizeof(init_stack) +	\
			  (long) &init_stack,	\
	.pc		= 0,			\
        .kregs		= &fake_swapper_regs,	\
	.uregs	        = NULL,			\
	.trap_no	= 0,			\
	.error_code	= 0,			\
	.address	= 0,			\
	.fpu		= { { { 0, } }, }	\
}

/*
 * Do necessary setup to start up a newly executed thread.
 */
#define SR_USER (SR_MMU | SR_FD)

#define start_thread(regs, new_pc, new_sp)			\
	set_fs(USER_DS);					\
	regs->sr = SR_USER;	/* User mode. */		\
	regs->pc = new_pc - 4;	/* Compensate syscall exit */	\
	regs->pc |= 1;		/* Set SHmedia ! */		\
	regs->regs[18] = 0;					\
	regs->regs[15] = new_sp

/* Forward declaration, a strange C thing */
struct task_struct;
struct mm_struct;

/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);
/*
 * create a kernel thread without removing it from tasklists
 */
extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);


/* Copy and release all segment info associated with a VM */
#define copy_segments(p, mm)	do { } while (0)
#define release_segments(mm)	do { } while (0)
#define forget_segments()	do { } while (0)
#define prepare_to_copy(tsk)	do { } while (0)
/*
 * FPU lazy state save handling.
 */

static inline void disable_fpu(void)
{
	unsigned long long __dummy;

	/* Set FD flag in SR */
	__asm__ __volatile__("getcon	" __SR ", %0\n\t"
			     "or	%0, %1, %0\n\t"
			     "putcon	%0, " __SR "\n\t"
			     : "=&r" (__dummy)
			     : "r" (SR_FD));
}

static inline void enable_fpu(void)
{
	unsigned long long __dummy;

	/* Clear out FD flag in SR */
	__asm__ __volatile__("getcon	" __SR ", %0\n\t"
			     "and	%0, %1, %0\n\t"
			     "putcon	%0, " __SR "\n\t"
			     : "=&r" (__dummy)
			     : "r" (~SR_FD));
}

/* Round to nearest, no exceptions on inexact, overflow, underflow,
   zero-divide, invalid.  Configure option for whether to flush denorms to
   zero, or except if a denorm is encountered.  */
#if defined(CONFIG_SH64_FPU_DENORM_FLUSH)
#define FPSCR_INIT  0x00040000
#else
#define FPSCR_INIT  0x00000000
#endif

#ifdef CONFIG_SH_FPU
/* Initialise the FP state of a task */
void fpinit(struct sh_fpu_hard_struct *fpregs);
#else
#define fpinit(fpregs)	do { } while (0)
#endif

extern struct task_struct *last_task_used_math;

/*
 * Return saved PC of a blocked thread.
 */
#define thread_saved_pc(tsk)	(tsk->thread.pc)

extern unsigned long get_wchan(struct task_struct *p);

#define KSTK_EIP(tsk)  ((tsk)->thread.pc)
#define KSTK_ESP(tsk)  ((tsk)->thread.sp)

#define cpu_relax()	barrier()

#endif	/* __ASSEMBLY__ */
#endif /* __ASM_SH_PROCESSOR_64_H */
Commit	Line	Data
af3c7dfe PM	1	#ifndef __ASM_SH_PROCESSOR_64_H
af3c7dfe PM	2	#define __ASM_SH_PROCESSOR_64_H
1da177e4 LT	3
1da177e4 LT	4	/*
af3c7dfe	5	* include/asm-sh/processor_64.h
1da177e4 LT	6	*
	7	* Copyright (C) 2000, 2001 Paolo Alberelli
	8	* Copyright (C) 2003 Paul Mundt
	9	* Copyright (C) 2004 Richard Curnow
	10	*
af3c7dfe PM	11	* This file is subject to the terms and conditions of the GNU General Public
	12	* License. See the file "COPYING" in the main directory of this archive
	13	* for more details.
1da177e4	14	*/
1da177e4 LT	15	#ifndef __ASSEMBLY__
1da177e4 LT	16
af3c7dfe PM	17	#include <linux/compiler.h>
af3c7dfe PM	18	#include <asm/page.h>
1da177e4 LT	19	#include <asm/types.h>
1da177e4 LT	20	#include <asm/cache.h>
256b22ca	21	#include <asm/ptrace.h>
af3c7dfe	22	#include <asm/cpu/registers.h>
1da177e4 LT	23
	24	/*
	25	* Default implementation of macro that returns current
	26	* instruction pointer ("program counter").
	27	*/
	28	#define current_text_addr() ({ \
	29	void *pc; \
	30	unsigned long long __dummy = 0; \
	31	__asm__("gettr tr0, %1\n\t" \
	32	"pta 4, tr0\n\t" \
	33	"gettr tr0, %0\n\t" \
	34	"ptabs %1, tr0\n\t" \
	35	:"=r" (pc), "=r" (__dummy) \
	36	: "1" (__dummy)); \
	37	pc; })
	38
1da177e4 LT	39	/*
	40	* TLB information structure
	41	*
	42	* Defined for both I and D tlb, per-processor.
	43	*/
	44	struct tlb_info {
	45	unsigned long long next;
	46	unsigned long long first;
	47	unsigned long long last;
	48
	49	unsigned int entries;
	50	unsigned int step;
	51
	52	unsigned long flags;
	53	};
	54
	55	struct sh_cpuinfo {
	56	enum cpu_type type;
	57	unsigned long loops_per_jiffy;
c0acca67	58	unsigned long asid_cache;
1da177e4	59
1da177e4 LT	60	unsigned int cpu_clock, master_clock, bus_clock, module_clock;
	61
	62	/* Cache info */
	63	struct cache_info icache;
	64	struct cache_info dcache;
c0acca67	65	struct cache_info scache;
1da177e4 LT	66
	67	/* TLB info */
	68	struct tlb_info itlb;
	69	struct tlb_info dtlb;
1da177e4	70
76168c21 PM	71	unsigned long flags;
76168c21 PM	72	};
1da177e4	73
76168c21 PM	74	extern struct sh_cpuinfo cpu_data[];
	75	#define boot_cpu_data cpu_data[0]
	76	#define current_cpu_data cpu_data[smp_processor_id()]
	77	#define raw_current_cpu_data cpu_data[raw_smp_processor_id()]
1da177e4 LT	78
	79	#endif
	80
	81	/*
	82	* User space process size: 2GB - 4k.
	83	*/
	84	#define TASK_SIZE 0x7ffff000UL
	85
922a70d3 DH	86	#define STACK_TOP TASK_SIZE
	87	#define STACK_TOP_MAX STACK_TOP
	88
1da177e4 LT	89	/* This decides where the kernel will search for a free chunk of vm
	90	* space during mmap's.
	91	*/
	92	#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
	93
	94	/*
	95	* Bit of SR register
	96	*
	97	* FD-bit:
	98	* When it's set, it means the processor doesn't have right to use FPU,
	99	* and it results exception when the floating operation is executed.
	100	*
	101	* IMASK-bit:
	102	* Interrupt level mask
	103	*
	104	* STEP-bit:
	105	* Single step bit
	106	*
	107	*/
1da177e4 LT	108	#if defined(CONFIG_SH64_SR_WATCH)
	109	#define SR_MMU 0x84000000
	110	#else
	111	#define SR_MMU 0x80000000
	112	#endif
	113
	114	#define SR_IMASK 0x000000f0
9bbafce2	115	#define SR_FD 0x00008000
1da177e4 LT	116	#define SR_SSTEP 0x08000000
	117
	118	#ifndef __ASSEMBLY__
	119
	120	/*
	121	* FPU structure and data : require 8-byte alignment as we need to access it
	122	with fld.p, fst.p
	123	*/
	124
	125	struct sh_fpu_hard_struct {
	126	unsigned long fp_regs[64];
	127	unsigned int fpscr;
	128	/* long status; * software status information */
	129	};
	130
	131	#if 0
	132	/* Dummy fpu emulator */
	133	struct sh_fpu_soft_struct {
	134	unsigned long long fp_regs[32];
	135	unsigned int fpscr;
	136	unsigned char lookahead;
	137	unsigned long entry_pc;
	138	};
	139	#endif
	140
	141	union sh_fpu_union {
	142	struct sh_fpu_hard_struct hard;
	143	/* 'hard' itself only produces 32 bit alignment, yet we need
	144	to access it using 64 bit load/store as well. */
	145	unsigned long long alignment_dummy;
	146	};
	147
	148	struct thread_struct {
	149	unsigned long sp;
	150	unsigned long pc;
	151	/* This stores the address of the pt_regs built during a context
	152	switch, or of the register save area built for a kernel mode
	153	exception. It is used for backtracing the stack of a sleeping task
	154	or one that traps in kernel mode. */
	155	struct pt_regs *kregs;
	156	/* This stores the address of the pt_regs constructed on entry from
	157	user mode. It is a fixed value over the lifetime of a process, or
	158	NULL for a kernel thread. */
	159	struct pt_regs *uregs;
	160
	161	unsigned long trap_no, error_code;
	162	unsigned long address;
	163	/* Hardware debugging registers may come here */
	164
	165	/* floating point info */
	166	union sh_fpu_union fpu;
	167	};
	168
af3c7dfe PM	169	typedef struct {
	170	unsigned long seg;
	171	} mm_segment_t;
	172
1da177e4 LT	173	#define INIT_MMAP \
	174	{ &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ \| VM_WRITE \| VM_EXEC, 1, NULL, NULL }
	175
	176	extern struct pt_regs fake_swapper_regs;
	177
	178	#define INIT_THREAD { \
	179	.sp = sizeof(init_stack) + \
	180	(long) &init_stack, \
	181	.pc = 0, \
	182	.kregs = &fake_swapper_regs, \
	183	.uregs = NULL, \
	184	.trap_no = 0, \
	185	.error_code = 0, \
	186	.address = 0, \
	187	.fpu = { { { 0, } }, } \
	188	}
	189
	190	/*
	191	* Do necessary setup to start up a newly executed thread.
	192	*/
	193	#define SR_USER (SR_MMU \| SR_FD)
	194
af3c7dfe PM	195	#define start_thread(regs, new_pc, new_sp) \
	196	set_fs(USER_DS); \
	197	regs->sr = SR_USER; /* User mode. */ \
1da177e4 LT	198	regs->pc = new_pc - 4; /* Compensate syscall exit */ \
1da177e4 LT	199	regs->pc \|= 1; /* Set SHmedia ! */ \
af3c7dfe	200	regs->regs[18] = 0; \
1da177e4 LT	201	regs->regs[15] = new_sp
	202
	203	/* Forward declaration, a strange C thing */
	204	struct task_struct;
	205	struct mm_struct;
	206
	207	/* Free all resources held by a thread. */
	208	extern void release_thread(struct task_struct *);
	209	/*
	210	* create a kernel thread without removing it from tasklists
	211	*/
	212	extern int kernel_thread(int (fn)(void ), void * arg, unsigned long flags);
	213
	214
	215	/* Copy and release all segment info associated with a VM */
	216	#define copy_segments(p, mm) do { } while (0)
	217	#define release_segments(mm) do { } while (0)
	218	#define forget_segments() do { } while (0)
	219	#define prepare_to_copy(tsk) do { } while (0)
	220	/*
	221	* FPU lazy state save handling.
	222	*/
	223
256b22ca	224	static inline void disable_fpu(void)
1da177e4 LT	225	{
	226	unsigned long long __dummy;
	227
	228	/* Set FD flag in SR */
	229	__asm__ __volatile__("getcon " __SR ", %0\n\t"
	230	"or %0, %1, %0\n\t"
	231	"putcon %0, " __SR "\n\t"
	232	: "=&r" (__dummy)
	233	: "r" (SR_FD));
	234	}
	235
256b22ca	236	static inline void enable_fpu(void)
1da177e4 LT	237	{
	238	unsigned long long __dummy;
	239
	240	/* Clear out FD flag in SR */
	241	__asm__ __volatile__("getcon " __SR ", %0\n\t"
	242	"and %0, %1, %0\n\t"
	243	"putcon %0, " __SR "\n\t"
	244	: "=&r" (__dummy)
	245	: "r" (~SR_FD));
	246	}
	247
	248	/* Round to nearest, no exceptions on inexact, overflow, underflow,
	249	zero-divide, invalid. Configure option for whether to flush denorms to
	250	zero, or except if a denorm is encountered. */
	251	#if defined(CONFIG_SH64_FPU_DENORM_FLUSH)
	252	#define FPSCR_INIT 0x00040000
	253	#else
	254	#define FPSCR_INIT 0x00000000
	255	#endif
	256
ffd25eb6	257	#ifdef CONFIG_SH_FPU
1da177e4 LT	258	/* Initialise the FP state of a task */
1da177e4 LT	259	void fpinit(struct sh_fpu_hard_struct *fpregs);
ffd25eb6	260	#else
ffd25eb6 PM	261	#define fpinit(fpregs) do { } while (0)
ffd25eb6 PM	262	#endif
1da177e4 LT	263
	264	extern struct task_struct *last_task_used_math;
	265
	266	/*
	267	* Return saved PC of a blocked thread.
	268	*/
	269	#define thread_saved_pc(tsk) (tsk->thread.pc)
	270
	271	extern unsigned long get_wchan(struct task_struct *p);
	272
	273	#define KSTK_EIP(tsk) ((tsk)->thread.pc)
	274	#define KSTK_ESP(tsk) ((tsk)->thread.sp)
	275
f6dc8c5b	276	#define cpu_relax() barrier()
1da177e4 LT	277
1da177e4 LT	278	#endif /* __ASSEMBLY__ */
af3c7dfe	279	#endif /* __ASM_SH_PROCESSOR_64_H */