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/*
* 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 *);
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 */