1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
/*
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* include/asm-alpha/processor.h
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*
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* Copyright (C) 1994 Linus Torvalds
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*/
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#ifndef __ASM_ALPHA_PROCESSOR_H
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#define __ASM_ALPHA_PROCESSOR_H
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#include <linux/personality.h> /* for ADDR_LIMIT_32BIT */
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/*
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* Returns current instruction pointer ("program counter").
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*/
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#define current_text_addr() \
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({ void *__pc; __asm__ ("br %0,.+4" : "=r"(__pc)); __pc; })
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/*
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* We have a 42-bit user address space: 4TB user VM...
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*/
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#define TASK_SIZE (0x40000000000UL)
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/* This decides where the kernel will search for a free chunk of vm
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* space during mmap's.
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*/
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#define TASK_UNMAPPED_BASE \
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((current->personality & ADDR_LIMIT_32BIT) ? 0x40000000 : TASK_SIZE / 2)
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typedef struct {
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unsigned long seg;
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} mm_segment_t;
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/* This is dead. Everything has been moved to thread_info. */
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struct thread_struct { };
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#define INIT_THREAD { }
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/* Return saved PC of a blocked thread. */
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struct task_struct;
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extern unsigned long thread_saved_pc(struct task_struct *);
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/* Do necessary setup to start up a newly executed thread. */
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extern void start_thread(struct pt_regs *, unsigned long, unsigned long);
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/* Free all resources held by a thread. */
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extern void release_thread(struct task_struct *);
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/* Prepare to copy thread state - unlazy all lazy status */
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#define prepare_to_copy(tsk) do { } while (0)
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/* Create a kernel thread without removing it from tasklists. */
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extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
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unsigned long get_wchan(struct task_struct *p);
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/* See arch/alpha/kernel/ptrace.c for details. */
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#define PT_REG(reg) \
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(PAGE_SIZE*2 - sizeof(struct pt_regs) + offsetof(struct pt_regs, reg))
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#define SW_REG(reg) \
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(PAGE_SIZE*2 - sizeof(struct pt_regs) - sizeof(struct switch_stack) \
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+ offsetof(struct switch_stack, reg))
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#define KSTK_EIP(tsk) \
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(*(unsigned long *)(PT_REG(pc) + (unsigned long) ((tsk)->thread_info)))
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#define KSTK_ESP(tsk) \
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((tsk) == current ? rdusp() : (tsk)->thread_info->pcb.usp)
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#define cpu_relax() barrier()
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#define ARCH_HAS_PREFETCH
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#define ARCH_HAS_PREFETCHW
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#define ARCH_HAS_SPINLOCK_PREFETCH
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#ifndef CONFIG_SMP
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/* Nothing to prefetch. */
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#define spin_lock_prefetch(lock) do { } while (0)
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#endif
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#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
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extern inline void prefetch(const void *ptr)
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{
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__builtin_prefetch(ptr, 0, 3);
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}
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extern inline void prefetchw(const void *ptr)
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{
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__builtin_prefetch(ptr, 1, 3);
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}
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#ifdef CONFIG_SMP
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extern inline void spin_lock_prefetch(const void *ptr)
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{
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__builtin_prefetch(ptr, 1, 3);
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}
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#endif
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#else
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extern inline void prefetch(const void *ptr)
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{
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__asm__ ("ldl $31,%0" : : "m"(*(char *)ptr));
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}
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extern inline void prefetchw(const void *ptr)
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{
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__asm__ ("ldq $31,%0" : : "m"(*(char *)ptr));
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}
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#ifdef CONFIG_SMP
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extern inline void spin_lock_prefetch(const void *ptr)
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{
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__asm__ ("ldq $31,%0" : : "m"(*(char *)ptr));
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}
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#endif
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#endif /* GCC 3.1 */
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#endif /* __ASM_ALPHA_PROCESSOR_H */
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