Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1/*
2 * Copyright (C) 2006 Atmark Techno, Inc.
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
6 * for more details.
7 */
8
9#ifndef _ASM_MICROBLAZE_SYSTEM_H
10#define _ASM_MICROBLAZE_SYSTEM_H
11
12#include <asm/registers.h>
13#include <asm/setup.h>
14#include <asm/irqflags.h>
15#include <asm/cache.h>
16
17#include <asm-generic/cmpxchg.h>
18#include <asm-generic/cmpxchg-local.h>
19
20struct task_struct;
21struct thread_info;
22
23extern struct task_struct *_switch_to(struct thread_info *prev,
24 struct thread_info *next);
25
26#define switch_to(prev, next, last) \
27 do { \
28 (last) = _switch_to(task_thread_info(prev), \
29 task_thread_info(next)); \
30 } while (0)
31
32#define smp_read_barrier_depends() do {} while (0)
33#define read_barrier_depends() do {} while (0)
34
35#define nop() asm volatile ("nop")
36#define mb() barrier()
37#define rmb() mb()
38#define wmb() mb()
39#define set_mb(var, value) do { var = value; mb(); } while (0)
40#define set_wmb(var, value) do { var = value; wmb(); } while (0)
41
42#define smp_mb() mb()
43#define smp_rmb() rmb()
44#define smp_wmb() wmb()
45
46void __bad_xchg(volatile void *ptr, int size);
47
48static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
49 int size)
50{
51 unsigned long ret;
52 unsigned long flags;
53
54 switch (size) {
55 case 1:
56 local_irq_save(flags);
57 ret = *(volatile unsigned char *)ptr;
58 *(volatile unsigned char *)ptr = x;
59 local_irq_restore(flags);
60 break;
61
62 case 4:
63 local_irq_save(flags);
64 ret = *(volatile unsigned long *)ptr;
65 *(volatile unsigned long *)ptr = x;
66 local_irq_restore(flags);
67 break;
68 default:
69 __bad_xchg(ptr, size), ret = 0;
70 break;
71 }
72
73 return ret;
74}
75
76void disable_hlt(void);
77void enable_hlt(void);
78void default_idle(void);
79
80#define xchg(ptr, x) \
81 ((__typeof__(*(ptr))) __xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
82
83void free_init_pages(char *what, unsigned long begin, unsigned long end);
84void free_initmem(void);
85extern char *klimit;
86extern void ret_from_fork(void);
87
88extern void *alloc_maybe_bootmem(size_t size, gfp_t mask);
89extern void *zalloc_maybe_bootmem(size_t size, gfp_t mask);
90
91#ifdef CONFIG_DEBUG_FS
92extern struct dentry *of_debugfs_root;
93#endif
94
95#define arch_align_stack(x) (x)
96
97#endif /* _ASM_MICROBLAZE_SYSTEM_H */