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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 */ |