projects / linux.git / blame
| 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 | ||
| 23 | /* This decides where the kernel will search for a free chunk of vm | |
| 24 | * space during mmap's. | |
| 25 | */ | |
| 26 | #define TASK_UNMAPPED_BASE \ | |
| 27 | ((current->personality & ADDR_LIMIT_32BIT) ? 0x40000000 : TASK_SIZE / 2) | |
| 28 | ||
| 29 | typedef struct { | |
| 30 | unsigned long seg; | |
| 31 | } mm_segment_t; | |
| 32 | ||
| 33 | /* This is dead. Everything has been moved to thread_info. */ | |
| 34 | struct thread_struct { }; | |
| 35 | #define INIT_THREAD { } | |
| 36 | ||
| 37 | /* Return saved PC of a blocked thread. */ | |
| 38 | struct task_struct; | |
| 39 | extern unsigned long thread_saved_pc(struct task_struct *); | |
| 40 | ||
| 41 | /* Do necessary setup to start up a newly executed thread. */ | |
| 42 | extern void start_thread(struct pt_regs *, unsigned long, unsigned long); | |
| 43 | ||
| 44 | /* Free all resources held by a thread. */ | |
| 45 | extern void release_thread(struct task_struct *); | |
| 46 | ||
| 47 | /* Prepare to copy thread state - unlazy all lazy status */ | |
| 48 | #define prepare_to_copy(tsk) do { } while (0) | |
| 49 | ||
| 50 | /* Create a kernel thread without removing it from tasklists. */ | |
| 51 | extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); | |
| 52 | ||
| 53 | unsigned long get_wchan(struct task_struct *p); | |
| 54 | ||
| e52f4ca2 | 55 | #define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc) |
| 1da177e4 LT |
56 | |
| 57 | #define KSTK_ESP(tsk) \ | |
| 37bfbaf9 | 58 | ((tsk) == current ? rdusp() : task_thread_info(tsk)->pcb.usp) |
| 1da177e4 LT |
59 | |
| 60 | #define cpu_relax() barrier() | |
| 61 | ||
| 62 | #define ARCH_HAS_PREFETCH | |
| 63 | #define ARCH_HAS_PREFETCHW | |
| 64 | #define ARCH_HAS_SPINLOCK_PREFETCH | |
| 65 | ||
| 66 | #ifndef CONFIG_SMP | |
| 67 | /* Nothing to prefetch. */ | |
| 68 | #define spin_lock_prefetch(lock) do { } while (0) | |
| 69 | #endif | |
| 70 | ||
| 1da177e4 LT |
71 | extern inline void prefetch(const void *ptr) |
| 72 | { | |
| 73 | __builtin_prefetch(ptr, 0, 3); | |
| 74 | } | |
| 75 | ||
| 76 | extern inline void prefetchw(const void *ptr) | |
| 77 | { | |
| 78 | __builtin_prefetch(ptr, 1, 3); | |
| 79 | } | |
| 80 | ||
| 81 | #ifdef CONFIG_SMP | |
| 82 | extern inline void spin_lock_prefetch(const void *ptr) | |
| 83 | { | |
| 84 | __builtin_prefetch(ptr, 1, 3); | |
| 85 | } | |
| 86 | #endif | |
| 87 | ||
| 1da177e4 | 88 | #endif /* __ASM_ALPHA_PROCESSOR_H */ |