include/asm-sparc64/processor.h - linux - Git at Google

 /* $Id: processor.h,v 1.83 2002/02/10 06:04:33 davem Exp $
  * include/asm-sparc64/processor.h
  *
  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
  */

 #ifndef __ASM_SPARC64_PROCESSOR_H
 #define __ASM_SPARC64_PROCESSOR_H

 /*
  * Sparc64 implementation of macro that returns current
  * instruction pointer ("program counter").
  */
 #define current_text_addr() ({ void *pc; __asm__("rd %%pc, %0" : "=r" (pc)); pc; })

 #include <asm/asi.h>
 #include <asm/a.out.h>
 #include <asm/pstate.h>
 #include <asm/ptrace.h>
 #include <asm/page.h>

 /* The sparc has no problems with write protection */
 #define wp_works_ok 1
 #define wp_works_ok__is_a_macro /* for versions in ksyms.c */

 /*
  * User lives in his very own context, and cannot reference us. Note
  * that TASK_SIZE is a misnomer, it really gives maximum user virtual
  * address that the kernel will allocate out.
  *
  * XXX No longer using virtual page tables, kill this upper limit...
  */
 #define VA_BITS		44
 #ifndef __ASSEMBLY__
 #define VPTE_SIZE	(1UL << (VA_BITS - PAGE_SHIFT + 3))
 #else
 #define VPTE_SIZE	(1 << (VA_BITS - PAGE_SHIFT + 3))
 #endif
 #define TASK_SIZE	((unsigned long)-VPTE_SIZE)

 #ifndef __ASSEMBLY__

 typedef struct {
 	unsigned char seg;
 } mm_segment_t;

 /* The Sparc processor specific thread struct. */
 /* XXX This should die, everything can go into thread_info now. */
 struct thread_struct {
 #ifdef CONFIG_DEBUG_SPINLOCK
 	/* How many spinlocks held by this thread.
 	 * Used with spin lock debugging to catch tasks
 	 * sleeping illegally with locks held.
 	 */
 	int smp_lock_count;
 	unsigned int smp_lock_pc;
 #else
 	int dummy; /* f'in gcc bug... */
 #endif
 };

 #endif /* !(__ASSEMBLY__) */

 #ifndef CONFIG_DEBUG_SPINLOCK
 #define INIT_THREAD  {			\
 	0,				\
 }
 #else /* CONFIG_DEBUG_SPINLOCK */
 #define INIT_THREAD  {					\
 /* smp_lock_count, smp_lock_pc, */			\
    0,		   0,					\
 }
 #endif /* !(CONFIG_DEBUG_SPINLOCK) */

 #ifndef __ASSEMBLY__

 #include <linux/types.h>

 /* Return saved PC of a blocked thread. */
 struct task_struct;
 extern unsigned long thread_saved_pc(struct task_struct *);

 /* On Uniprocessor, even in RMO processes see TSO semantics */
 #ifdef CONFIG_SMP
 #define TSTATE_INITIAL_MM	TSTATE_TSO
 #else
 #define TSTATE_INITIAL_MM	TSTATE_RMO
 #endif

 /* Do necessary setup to start up a newly executed thread. */
 #define start_thread(regs, pc, sp) \
 do { \
 	unsigned long __asi = ASI_PNF; \
 	regs->tstate = (regs->tstate & (TSTATE_CWP)) | (TSTATE_INITIAL_MM|TSTATE_IE) | (__asi << 24UL); \
 	regs->tpc = ((pc & (~3)) - 4); \
 	regs->tnpc = regs->tpc + 4; \
 	regs->y = 0; \
 	set_thread_wstate(1 << 3); \
 	if (current_thread_info()->utraps) { \
 		if (*(current_thread_info()->utraps) < 2) \
 			kfree(current_thread_info()->utraps); \
 		else \
 			(*(current_thread_info()->utraps))--; \
 		current_thread_info()->utraps = NULL; \
 	} \
 	__asm__ __volatile__( \
 	"stx		%%g0, [%0 + %2 + 0x00]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x08]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x10]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x18]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x20]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x28]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x30]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x38]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x40]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x48]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x50]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x58]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x60]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x68]\n\t" \
 	"stx		%1,   [%0 + %2 + 0x70]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x78]\n\t" \
 	"wrpr		%%g0, (1 << 3), %%wstate\n\t" \
 	: \
 	: "r" (regs), "r" (sp - sizeof(struct reg_window) - STACK_BIAS), \
 	  "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
 } while (0)

 #define start_thread32(regs, pc, sp) \
 do { \
 	unsigned long __asi = ASI_PNF; \
 	pc &= 0x00000000ffffffffUL; \
 	sp &= 0x00000000ffffffffUL; \
 	regs->tstate = (regs->tstate & (TSTATE_CWP))|(TSTATE_INITIAL_MM|TSTATE_IE|TSTATE_AM) | (__asi << 24UL); \
 	regs->tpc = ((pc & (~3)) - 4); \
 	regs->tnpc = regs->tpc + 4; \
 	regs->y = 0; \
 	set_thread_wstate(2 << 3); \
 	if (current_thread_info()->utraps) { \
 		if (*(current_thread_info()->utraps) < 2) \
 			kfree(current_thread_info()->utraps); \
 		else \
 			(*(current_thread_info()->utraps))--; \
 		current_thread_info()->utraps = NULL; \
 	} \
 	__asm__ __volatile__( \
 	"stx		%%g0, [%0 + %2 + 0x00]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x08]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x10]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x18]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x20]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x28]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x30]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x38]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x40]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x48]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x50]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x58]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x60]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x68]\n\t" \
 	"stx		%1,   [%0 + %2 + 0x70]\n\t" \
 	"stx		%%g0, [%0 + %2 + 0x78]\n\t" \
 	"wrpr		%%g0, (2 << 3), %%wstate\n\t" \
 	: \
 	: "r" (regs), "r" (sp - sizeof(struct reg_window32)), \
 	  "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
 } while (0)

 /* Free all resources held by a thread. */
 #define release_thread(tsk)		do { } while (0)

 /* Prepare to copy thread state - unlazy all lazy status */
 #define prepare_to_copy(tsk)	do { } while (0)

 extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);

 extern unsigned long get_wchan(struct task_struct *task);

 #define task_pt_regs(tsk) (task_thread_info(tsk)->kregs)
 #define KSTK_EIP(tsk)  (task_pt_regs(tsk)->tpc)
 #define KSTK_ESP(tsk)  (task_pt_regs(tsk)->u_regs[UREG_FP])

 #define cpu_relax()	barrier()

 /* Prefetch support.  This is tuned for UltraSPARC-III and later.
  * UltraSPARC-I will treat these as nops, and UltraSPARC-II has
  * a shallower prefetch queue than later chips.
  */
 #define ARCH_HAS_PREFETCH
 #define ARCH_HAS_PREFETCHW
 #define ARCH_HAS_SPINLOCK_PREFETCH

 static inline void prefetch(const void *x)
 {
 	/* We do not use the read prefetch mnemonic because that
 	 * prefetches into the prefetch-cache which only is accessible
 	 * by floating point operations in UltraSPARC-III and later.
 	 * By contrast, "#one_write" prefetches into the L2 cache
 	 * in shared state.
 	 */
 	__asm__ __volatile__("prefetch [%0], #one_write"
 			     : /* no outputs */
 			     : "r" (x));
 }

 static inline void prefetchw(const void *x)
 {
 	/* The most optimal prefetch to use for writes is
 	 * "#n_writes".  This brings the cacheline into the
 	 * L2 cache in "owned" state.
 	 */
 	__asm__ __volatile__("prefetch [%0], #n_writes"
 			     : /* no outputs */
 			     : "r" (x));
 }

 #define spin_lock_prefetch(x)	prefetchw(x)

 #define HAVE_ARCH_PICK_MMAP_LAYOUT

 #endif /* !(__ASSEMBLY__) */

 #endif /* !(__ASM_SPARC64_PROCESSOR_H) */
	/* $Id: processor.h,v 1.83 2002/02/10 06:04:33 davem Exp $
	* include/asm-sparc64/processor.h
	*
	* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
	*/

	#ifndef __ASM_SPARC64_PROCESSOR_H
	#define __ASM_SPARC64_PROCESSOR_H

	/*
	* Sparc64 implementation of macro that returns current
	* instruction pointer ("program counter").
	*/
	#define current_text_addr() ({ void *pc; __asm__("rd %%pc, %0" : "=r" (pc)); pc; })

	#include <asm/asi.h>
	#include <asm/a.out.h>
	#include <asm/pstate.h>
	#include <asm/ptrace.h>
	#include <asm/page.h>

	/* The sparc has no problems with write protection */
	#define wp_works_ok 1
	#define wp_works_ok__is_a_macro /* for versions in ksyms.c */

	/*
	* User lives in his very own context, and cannot reference us. Note
	* that TASK_SIZE is a misnomer, it really gives maximum user virtual
	* address that the kernel will allocate out.
	*
	* XXX No longer using virtual page tables, kill this upper limit...
	*/
	#define VA_BITS 44
	#ifndef __ASSEMBLY__
	#define VPTE_SIZE (1UL << (VA_BITS - PAGE_SHIFT + 3))
	#else
	#define VPTE_SIZE (1 << (VA_BITS - PAGE_SHIFT + 3))
	#endif
	#define TASK_SIZE ((unsigned long)-VPTE_SIZE)

	#ifndef __ASSEMBLY__

	typedef struct {
	unsigned char seg;
	} mm_segment_t;

	/* The Sparc processor specific thread struct. */
	/* XXX This should die, everything can go into thread_info now. */
	struct thread_struct {
	#ifdef CONFIG_DEBUG_SPINLOCK
	/* How many spinlocks held by this thread.
	* Used with spin lock debugging to catch tasks
	* sleeping illegally with locks held.
	*/
	int smp_lock_count;
	unsigned int smp_lock_pc;
	#else
	int dummy; /* f'in gcc bug... */
	#endif
	};

	#endif /* !(__ASSEMBLY__) */

	#ifndef CONFIG_DEBUG_SPINLOCK
	#define INIT_THREAD { \
	0, \
	}
	#else /* CONFIG_DEBUG_SPINLOCK */
	#define INIT_THREAD { \
	/* smp_lock_count, smp_lock_pc, */ \
	0, 0, \
	}
	#endif /* !(CONFIG_DEBUG_SPINLOCK) */

	#ifndef __ASSEMBLY__

	#include <linux/types.h>

	/* Return saved PC of a blocked thread. */
	struct task_struct;
	extern unsigned long thread_saved_pc(struct task_struct *);

	/* On Uniprocessor, even in RMO processes see TSO semantics */
	#ifdef CONFIG_SMP
	#define TSTATE_INITIAL_MM TSTATE_TSO
	#else
	#define TSTATE_INITIAL_MM TSTATE_RMO
	#endif

	/* Do necessary setup to start up a newly executed thread. */
	#define start_thread(regs, pc, sp) \
	do { \
	unsigned long __asi = ASI_PNF; \
	regs->tstate = (regs->tstate & (TSTATE_CWP)) \| (TSTATE_INITIAL_MM\|TSTATE_IE) \| (__asi << 24UL); \
	regs->tpc = ((pc & (~3)) - 4); \
	regs->tnpc = regs->tpc + 4; \
	regs->y = 0; \
	set_thread_wstate(1 << 3); \
	if (current_thread_info()->utraps) { \
	if (*(current_thread_info()->utraps) < 2) \
	kfree(current_thread_info()->utraps); \
	else \
	(*(current_thread_info()->utraps))--; \
	current_thread_info()->utraps = NULL; \
	} \
	__asm__ __volatile__( \
	"stx %%g0, [%0 + %2 + 0x00]\n\t" \
	"stx %%g0, [%0 + %2 + 0x08]\n\t" \
	"stx %%g0, [%0 + %2 + 0x10]\n\t" \
	"stx %%g0, [%0 + %2 + 0x18]\n\t" \
	"stx %%g0, [%0 + %2 + 0x20]\n\t" \
	"stx %%g0, [%0 + %2 + 0x28]\n\t" \
	"stx %%g0, [%0 + %2 + 0x30]\n\t" \
	"stx %%g0, [%0 + %2 + 0x38]\n\t" \
	"stx %%g0, [%0 + %2 + 0x40]\n\t" \
	"stx %%g0, [%0 + %2 + 0x48]\n\t" \
	"stx %%g0, [%0 + %2 + 0x50]\n\t" \
	"stx %%g0, [%0 + %2 + 0x58]\n\t" \
	"stx %%g0, [%0 + %2 + 0x60]\n\t" \
	"stx %%g0, [%0 + %2 + 0x68]\n\t" \
	"stx %1, [%0 + %2 + 0x70]\n\t" \
	"stx %%g0, [%0 + %2 + 0x78]\n\t" \
	"wrpr %%g0, (1 << 3), %%wstate\n\t" \
	: \
	: "r" (regs), "r" (sp - sizeof(struct reg_window) - STACK_BIAS), \
	"i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
	} while (0)

	#define start_thread32(regs, pc, sp) \
	do { \
	unsigned long __asi = ASI_PNF; \
	pc &= 0x00000000ffffffffUL; \
	sp &= 0x00000000ffffffffUL; \
	regs->tstate = (regs->tstate & (TSTATE_CWP))\|(TSTATE_INITIAL_MM\|TSTATE_IE\|TSTATE_AM) \| (__asi << 24UL); \
	regs->tpc = ((pc & (~3)) - 4); \
	regs->tnpc = regs->tpc + 4; \
	regs->y = 0; \
	set_thread_wstate(2 << 3); \
	if (current_thread_info()->utraps) { \
	if (*(current_thread_info()->utraps) < 2) \
	kfree(current_thread_info()->utraps); \
	else \
	(*(current_thread_info()->utraps))--; \
	current_thread_info()->utraps = NULL; \
	} \
	__asm__ __volatile__( \
	"stx %%g0, [%0 + %2 + 0x00]\n\t" \
	"stx %%g0, [%0 + %2 + 0x08]\n\t" \
	"stx %%g0, [%0 + %2 + 0x10]\n\t" \
	"stx %%g0, [%0 + %2 + 0x18]\n\t" \
	"stx %%g0, [%0 + %2 + 0x20]\n\t" \
	"stx %%g0, [%0 + %2 + 0x28]\n\t" \
	"stx %%g0, [%0 + %2 + 0x30]\n\t" \
	"stx %%g0, [%0 + %2 + 0x38]\n\t" \
	"stx %%g0, [%0 + %2 + 0x40]\n\t" \
	"stx %%g0, [%0 + %2 + 0x48]\n\t" \
	"stx %%g0, [%0 + %2 + 0x50]\n\t" \
	"stx %%g0, [%0 + %2 + 0x58]\n\t" \
	"stx %%g0, [%0 + %2 + 0x60]\n\t" \
	"stx %%g0, [%0 + %2 + 0x68]\n\t" \
	"stx %1, [%0 + %2 + 0x70]\n\t" \
	"stx %%g0, [%0 + %2 + 0x78]\n\t" \
	"wrpr %%g0, (2 << 3), %%wstate\n\t" \
	: \
	: "r" (regs), "r" (sp - sizeof(struct reg_window32)), \
	"i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
	} while (0)

	/* Free all resources held by a thread. */
	#define release_thread(tsk) do { } while (0)

	/* Prepare to copy thread state - unlazy all lazy status */
	#define prepare_to_copy(tsk) do { } while (0)

	extern pid_t kernel_thread(int (fn)(void ), void * arg, unsigned long flags);

	extern unsigned long get_wchan(struct task_struct *task);

	#define task_pt_regs(tsk) (task_thread_info(tsk)->kregs)
	#define KSTK_EIP(tsk) (task_pt_regs(tsk)->tpc)
	#define KSTK_ESP(tsk) (task_pt_regs(tsk)->u_regs[UREG_FP])

	#define cpu_relax() barrier()

	/* Prefetch support. This is tuned for UltraSPARC-III and later.
	* UltraSPARC-I will treat these as nops, and UltraSPARC-II has
	* a shallower prefetch queue than later chips.
	*/
	#define ARCH_HAS_PREFETCH
	#define ARCH_HAS_PREFETCHW
	#define ARCH_HAS_SPINLOCK_PREFETCH

	static inline void prefetch(const void *x)
	{
	/* We do not use the read prefetch mnemonic because that
	* prefetches into the prefetch-cache which only is accessible
	* by floating point operations in UltraSPARC-III and later.
	* By contrast, "#one_write" prefetches into the L2 cache
	* in shared state.
	*/
	__asm__ __volatile__("prefetch [%0], #one_write"
	: /* no outputs */
	: "r" (x));
	}

	static inline void prefetchw(const void *x)
	{
	/* The most optimal prefetch to use for writes is
	* "#n_writes". This brings the cacheline into the
	* L2 cache in "owned" state.
	*/
	__asm__ __volatile__("prefetch [%0], #n_writes"
	: /* no outputs */
	: "r" (x));
	}

	#define spin_lock_prefetch(x) prefetchw(x)

	#define HAVE_ARCH_PICK_MMAP_LAYOUT

	#endif /* !(__ASSEMBLY__) */

	#endif /* !(__ASM_SPARC64_PROCESSOR_H) */