119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
|
/*
|
||
|
|
* 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)
|
||
|
|
|
||
|
|
/* 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);
|
||
|
|
|
||
|
|
/* See arch/alpha/kernel/ptrace.c for details. */
|
||
|
|
#define PT_REG(reg) \
|
||
|
|
(PAGE_SIZE*2 - sizeof(struct pt_regs) + offsetof(struct pt_regs, reg))
|
||
|
|
|
||
|
|
#define SW_REG(reg) \
|
||
|
|
(PAGE_SIZE*2 - sizeof(struct pt_regs) - sizeof(struct switch_stack) \
|
||
|
|
+ offsetof(struct switch_stack, reg))
|
||
|
|
|
||
|
|
#define KSTK_EIP(tsk) \
|
||
|
|
(*(unsigned long *)(PT_REG(pc) + (unsigned long) ((tsk)->thread_info)))
|
||
|
|
|
||
|
|
#define KSTK_ESP(tsk) \
|
||
|
|
((tsk) == current ? rdusp() : (tsk)->thread_info->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
|
||
|
|
|
||
|
|
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
|
||
|
|
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
|
||
|
|
|
||
|
|
#else
|
||
|
|
extern inline void prefetch(const void *ptr)
|
||
|
|
{
|
||
|
|
__asm__ ("ldl $31,%0" : : "m"(*(char *)ptr));
|
||
|
|
}
|
||
|
|
|
||
|
|
extern inline void prefetchw(const void *ptr)
|
||
|
|
{
|
||
|
|
__asm__ ("ldq $31,%0" : : "m"(*(char *)ptr));
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CONFIG_SMP
|
||
|
|
extern inline void spin_lock_prefetch(const void *ptr)
|
||
|
|
{
|
||
|
|
__asm__ ("ldq $31,%0" : : "m"(*(char *)ptr));
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* GCC 3.1 */
|
||
|
|
|
||
|
|
#endif /* __ASM_ALPHA_PROCESSOR_H */
|