projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 1da177e4 LT |
2 | /* |
| 3 | * include/asm-alpha/processor.h | |
| 4 | * | |
| 5 | * Copyright (C) 1994 Linus Torvalds | |
| 6 | */ | |
| 7 | ||
| 8 | #ifndef __ASM_ALPHA_PROCESSOR_H | |
| 9 | #define __ASM_ALPHA_PROCESSOR_H | |
| 10 | ||
| 11 | #include <linux/personality.h> /* for ADDR_LIMIT_32BIT */ | |
| 12 | ||
| 13 | /* | |
| 14 | * Returns current instruction pointer ("program counter"). | |
| 15 | */ | |
| 16 | #define current_text_addr() \ | |
| 17 | ({ void *__pc; __asm__ ("br %0,.+4" : "=r"(__pc)); __pc; }) | |
| 18 | ||
| 19 | /* | |
| 20 | * We have a 42-bit user address space: 4TB user VM... | |
| 21 | */ | |
| 22 | #define TASK_SIZE (0x40000000000UL) | |
| 23 | ||
| 922a70d3 DH |
24 | #define STACK_TOP \ |
| 25 | (current->personality & ADDR_LIMIT_32BIT ? 0x80000000 : 0x00120000000UL) | |
| 26 | ||
| 27 | #define STACK_TOP_MAX 0x00120000000UL | |
| 28 | ||
| 1da177e4 LT |
29 | /* This decides where the kernel will search for a free chunk of vm |
| 30 | * space during mmap's. | |
| 31 | */ | |
| 32 | #define TASK_UNMAPPED_BASE \ | |
| 33 | ((current->personality & ADDR_LIMIT_32BIT) ? 0x40000000 : TASK_SIZE / 2) | |
| 34 | ||
| 35 | typedef struct { | |
| 36 | unsigned long seg; | |
| 37 | } mm_segment_t; | |
| 38 | ||
| 39 | /* This is dead. Everything has been moved to thread_info. */ | |
| 40 | struct thread_struct { }; | |
| 41 | #define INIT_THREAD { } | |
| 42 | ||
| 43 | /* Return saved PC of a blocked thread. */ | |
| 44 | struct task_struct; | |
| 45 | extern unsigned long thread_saved_pc(struct task_struct *); | |
| 46 | ||
| 47 | /* Do necessary setup to start up a newly executed thread. */ | |
| 396ada68 | 48 | struct pt_regs; |
| 1da177e4 LT |
49 | extern void start_thread(struct pt_regs *, unsigned long, unsigned long); |
| 50 | ||
| 51 | /* Free all resources held by a thread. */ | |
| 52 | extern void release_thread(struct task_struct *); | |
| 53 | ||
| 1da177e4 LT |
54 | unsigned long get_wchan(struct task_struct *p); |
| 55 | ||
| e52f4ca2 | 56 | #define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc) |
| 1da177e4 LT |
57 | |
| 58 | #define KSTK_ESP(tsk) \ | |
| 37bfbaf9 | 59 | ((tsk) == current ? rdusp() : task_thread_info(tsk)->pcb.usp) |
| 1da177e4 LT |
60 | |
| 61 | #define cpu_relax() barrier() | |
| 62 | ||
| 63 | #define ARCH_HAS_PREFETCH | |
| 64 | #define ARCH_HAS_PREFETCHW | |
| 65 | #define ARCH_HAS_SPINLOCK_PREFETCH | |
| 66 | ||
| 67 | #ifndef CONFIG_SMP | |
| 68 | /* Nothing to prefetch. */ | |
| 69 | #define spin_lock_prefetch(lock) do { } while (0) | |
| 70 | #endif | |
| 71 | ||
| 1da177e4 LT |
72 | extern inline void prefetch(const void *ptr) |
| 73 | { | |
| 74 | __builtin_prefetch(ptr, 0, 3); | |
| 75 | } | |
| 76 | ||
| 77 | extern inline void prefetchw(const void *ptr) | |
| 78 | { | |
| 79 | __builtin_prefetch(ptr, 1, 3); | |
| 80 | } | |
| 81 | ||
| 82 | #ifdef CONFIG_SMP | |
| 83 | extern inline void spin_lock_prefetch(const void *ptr) | |
| 84 | { | |
| 85 | __builtin_prefetch(ptr, 1, 3); | |
| 86 | } | |
| 87 | #endif | |
| 88 | ||
| 1da177e4 | 89 | #endif /* __ASM_ALPHA_PROCESSOR_H */ |