microblaze: Remove NET_IP_ALIGN from system.h
[linux-2.6.git] / arch / microblaze / include / asm / system.h
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
20 #define __ARCH_WANT_INTERRUPTS_ON_CTXSW
21
22 struct task_struct;
23 struct thread_info;
24
25 extern struct task_struct *_switch_to(struct thread_info *prev,
26                                         struct thread_info *next);
27
28 #define switch_to(prev, next, last)                                     \
29         do {                                                            \
30                 (last) = _switch_to(task_thread_info(prev),             \
31                                         task_thread_info(next));        \
32         } while (0)
33
34 #define smp_read_barrier_depends()      do {} while (0)
35 #define read_barrier_depends()          do {} while (0)
36
37 #define nop()                   asm volatile ("nop")
38 #define mb()                    barrier()
39 #define rmb()                   mb()
40 #define wmb()                   mb()
41 #define set_mb(var, value)      do { var = value; mb(); } while (0)
42 #define set_wmb(var, value)     do { var = value; wmb(); } while (0)
43
44 #define smp_mb()                mb()
45 #define smp_rmb()               rmb()
46 #define smp_wmb()               wmb()
47
48 void __bad_xchg(volatile void *ptr, int size);
49
50 static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
51                                                                 int size)
52 {
53         unsigned long ret;
54         unsigned long flags;
55
56         switch (size) {
57         case 1:
58                 local_irq_save(flags);
59                 ret = *(volatile unsigned char *)ptr;
60                 *(volatile unsigned char *)ptr = x;
61                 local_irq_restore(flags);
62                 break;
63
64         case 4:
65                 local_irq_save(flags);
66                 ret = *(volatile unsigned long *)ptr;
67                 *(volatile unsigned long *)ptr = x;
68                 local_irq_restore(flags);
69                 break;
70         default:
71                 __bad_xchg(ptr, size), ret = 0;
72                 break;
73         }
74
75         return ret;
76 }
77
78 void disable_hlt(void);
79 void enable_hlt(void);
80 void default_idle(void);
81
82 #define xchg(ptr, x) \
83         ((__typeof__(*(ptr))) __xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
84
85 void free_init_pages(char *what, unsigned long begin, unsigned long end);
86 void free_initmem(void);
87 extern char *klimit;
88 extern void ret_from_fork(void);
89
90 extern void *alloc_maybe_bootmem(size_t size, gfp_t mask);
91 extern void *zalloc_maybe_bootmem(size_t size, gfp_t mask);
92
93 #ifdef CONFIG_DEBUG_FS
94 extern struct dentry *of_debugfs_root;
95 #endif
96
97 #define arch_align_stack(x) (x)
98
99 #endif /* _ASM_MICROBLAZE_SYSTEM_H */