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
16struct task_struct;
17struct thread_info;
18
19extern struct task_struct *_switch_to(struct thread_info *prev,
20 struct thread_info *next);
21
22#define switch_to(prev, next, last) \
23 do { \
24 (last) = _switch_to(task_thread_info(prev), \
25 task_thread_info(next)); \
26 } while (0)
27
28#define smp_read_barrier_depends() do {} while (0)
29#define read_barrier_depends() do {} while (0)
30
31#define nop() asm volatile ("nop")
32#define mb() barrier()
33#define rmb() mb()
34#define wmb() mb()
35#define set_mb(var, value) do { var = value; mb(); } while (0)
36#define set_wmb(var, value) do { var = value; wmb(); } while (0)
37
38#define smp_mb() mb()
39#define smp_rmb() rmb()
40#define smp_wmb() wmb()
41
42void show_trace(struct task_struct *task, unsigned long *stack);
43void __bad_xchg(volatile void *ptr, int size);
44
45static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
46 int size)
47{
48 unsigned long ret;
49 unsigned long flags;
50
51 switch (size) {
52 case 1:
53 local_irq_save(flags);
54 ret = *(volatile unsigned char *)ptr;
55 *(volatile unsigned char *)ptr = x;
56 local_irq_restore(flags);
57 break;
58
59 case 4:
60 local_irq_save(flags);
61 ret = *(volatile unsigned long *)ptr;
62 *(volatile unsigned long *)ptr = x;
63 local_irq_restore(flags);
64 break;
65 default:
66 __bad_xchg(ptr, size), ret = 0;
67 break;
68 }
69
70 return ret;
71}
72
73void disable_hlt(void);
74void enable_hlt(void);
75void default_idle(void);
76
77#define xchg(ptr, x) \
78 ((__typeof__(*(ptr))) __xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
79
80void free_init_pages(char *what, unsigned long begin, unsigned long end);
81void free_initmem(void);
82extern char *klimit;
83extern void ret_from_fork(void);
84
85#ifdef CONFIG_DEBUG_FS
86extern struct dentry *of_debugfs_root;
87#endif
88
89#define arch_align_stack(x) (x)
90
91#endif /* _ASM_MICROBLAZE_SYSTEM_H */