[deliverable/linux.git] / include / asm-alpha / processor.h

/*
 * include/asm-alpha/processor.h
 *
 * Copyright (C) 1994 Linus Torvalds
 */

#ifndef __ASM_ALPHA_PROCESSOR_H
#define __ASM_ALPHA_PROCESSOR_H

#include <linux/personality.h>	/* for ADDR_LIMIT_32BIT */

/*
 * Returns current instruction pointer ("program counter").
 */
#define current_text_addr() \
  ({ void *__pc; __asm__ ("br %0,.+4" : "=r"(__pc)); __pc; })

/*
 * We have a 42-bit user address space: 4TB user VM...
 */
#define TASK_SIZE (0x40000000000UL)

#define STACK_TOP \
  (current->personality & ADDR_LIMIT_32BIT ? 0x80000000 : 0x00120000000UL)

#define STACK_TOP_MAX	0x00120000000UL

/* This decides where the kernel will search for a free chunk of vm
 * space during mmap's.
 */
#define TASK_UNMAPPED_BASE \
  ((current->personality & ADDR_LIMIT_32BIT) ? 0x40000000 : TASK_SIZE / 2)

typedef struct {
	unsigned long seg;
} mm_segment_t;

/* This is dead.  Everything has been moved to thread_info.  */
struct thread_struct { };
#define INIT_THREAD  { }

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

/* Do necessary setup to start up a newly executed thread.  */
extern void start_thread(struct pt_regs *, unsigned long, unsigned long);

/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);

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

/* Create a kernel thread without removing it from tasklists.  */
extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);

unsigned long get_wchan(struct task_struct *p);

#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)

#define KSTK_ESP(tsk) \
  ((tsk) == current ? rdusp() : task_thread_info(tsk)->pcb.usp)

#define cpu_relax()	barrier()

#define ARCH_HAS_PREFETCH
#define ARCH_HAS_PREFETCHW
#define ARCH_HAS_SPINLOCK_PREFETCH

#ifndef CONFIG_SMP
/* Nothing to prefetch. */
#define spin_lock_prefetch(lock)  	do { } while (0)
#endif

extern inline void prefetch(const void *ptr)  
{ 
	__builtin_prefetch(ptr, 0, 3);
}

extern inline void prefetchw(const void *ptr)  
{
	__builtin_prefetch(ptr, 1, 3);
}

#ifdef CONFIG_SMP
extern inline void spin_lock_prefetch(const void *ptr)  
{
	__builtin_prefetch(ptr, 1, 3);
}
#endif

#endif /* __ASM_ALPHA_PROCESSOR_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* include/asm-alpha/processor.h
	3	*
	4	* Copyright (C) 1994 Linus Torvalds
	5	*/
	6
	7	#ifndef __ASM_ALPHA_PROCESSOR_H
	8	#define __ASM_ALPHA_PROCESSOR_H
	9
	10	#include <linux/personality.h> /* for ADDR_LIMIT_32BIT */
	11
	12	/*
	13	* Returns current instruction pointer ("program counter").
	14	*/
	15	#define current_text_addr() \
	16	({ void *__pc; __asm__ ("br %0,.+4" : "=r"(__pc)); __pc; })
	17
	18	/*
	19	* We have a 42-bit user address space: 4TB user VM...
	20	*/
	21	#define TASK_SIZE (0x40000000000UL)
	22
922a70d3 DH	23	#define STACK_TOP \
	24	(current->personality & ADDR_LIMIT_32BIT ? 0x80000000 : 0x00120000000UL)
	25
	26	#define STACK_TOP_MAX 0x00120000000UL
	27
1da177e4 LT	28	/* This decides where the kernel will search for a free chunk of vm
	29	* space during mmap's.
	30	*/
	31	#define TASK_UNMAPPED_BASE \
	32	((current->personality & ADDR_LIMIT_32BIT) ? 0x40000000 : TASK_SIZE / 2)
	33
	34	typedef struct {
	35	unsigned long seg;
	36	} mm_segment_t;
	37
	38	/* This is dead. Everything has been moved to thread_info. */
	39	struct thread_struct { };
	40	#define INIT_THREAD { }
	41
	42	/* Return saved PC of a blocked thread. */
	43	struct task_struct;
	44	extern unsigned long thread_saved_pc(struct task_struct *);
	45
	46	/* Do necessary setup to start up a newly executed thread. */
	47	extern void start_thread(struct pt_regs *, unsigned long, unsigned long);
	48
	49	/* Free all resources held by a thread. */
	50	extern void release_thread(struct task_struct *);
	51
	52	/* Prepare to copy thread state - unlazy all lazy status */
	53	#define prepare_to_copy(tsk) do { } while (0)
	54
	55	/* Create a kernel thread without removing it from tasklists. */
	56	extern long kernel_thread(int (fn)(void ), void *arg, unsigned long flags);
	57
	58	unsigned long get_wchan(struct task_struct *p);
	59
e52f4ca2	60	#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)
1da177e4 LT	61
1da177e4 LT	62	#define KSTK_ESP(tsk) \
37bfbaf9	63	((tsk) == current ? rdusp() : task_thread_info(tsk)->pcb.usp)
1da177e4 LT	64
	65	#define cpu_relax() barrier()
	66
	67	#define ARCH_HAS_PREFETCH
	68	#define ARCH_HAS_PREFETCHW
	69	#define ARCH_HAS_SPINLOCK_PREFETCH
	70
	71	#ifndef CONFIG_SMP
	72	/* Nothing to prefetch. */
	73	#define spin_lock_prefetch(lock) do { } while (0)
	74	#endif
	75
1da177e4 LT	76	extern inline void prefetch(const void *ptr)
	77	{
	78	__builtin_prefetch(ptr, 0, 3);
	79	}
	80
	81	extern inline void prefetchw(const void *ptr)
	82	{
	83	__builtin_prefetch(ptr, 1, 3);
	84	}
	85
	86	#ifdef CONFIG_SMP
	87	extern inline void spin_lock_prefetch(const void *ptr)
	88	{
	89	__builtin_prefetch(ptr, 1, 3);
	90	}
	91	#endif
	92
1da177e4	93	#endif /* __ASM_ALPHA_PROCESSOR_H */