Michal Simek | 4511ec1 | 2009-03-27 14:25:37 +0100 | [diff] [blame^] | 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 | |
| 16 | struct task_struct; |
| 17 | struct thread_info; |
| 18 | |
| 19 | extern 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 | |
| 42 | void show_trace(struct task_struct *task, unsigned long *stack); |
| 43 | void __bad_xchg(volatile void *ptr, int size); |
| 44 | |
| 45 | static 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 | |
| 73 | void disable_hlt(void); |
| 74 | void enable_hlt(void); |
| 75 | void default_idle(void); |
| 76 | |
| 77 | #define xchg(ptr, x) \ |
| 78 | ((__typeof__(*(ptr))) __xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))) |
| 79 | |
| 80 | void free_init_pages(char *what, unsigned long begin, unsigned long end); |
| 81 | void free_initmem(void); |
| 82 | extern char *klimit; |
| 83 | extern void ret_from_fork(void); |
| 84 | |
| 85 | #ifdef CONFIG_DEBUG_FS |
| 86 | extern struct dentry *of_debugfs_root; |
| 87 | #endif |
| 88 | |
| 89 | #define arch_align_stack(x) (x) |
| 90 | |
| 91 | #endif /* _ASM_MICROBLAZE_SYSTEM_H */ |