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> |
John Linn | e44171f | 2010-04-08 07:08:02 +0000 | [diff] [blame] | 15 | #include <asm/cache.h> |
Michal Simek | 4511ec1 | 2009-03-27 14:25:37 +0100 | [diff] [blame] | 16 | |
Remis Lima Baima | 0a58458 | 2009-06-18 19:55:33 +0200 | [diff] [blame] | 17 | #include <asm-generic/cmpxchg.h> |
| 18 | #include <asm-generic/cmpxchg-local.h> |
| 19 | |
Michal Simek | bf2d809 | 2009-12-10 12:07:02 +0100 | [diff] [blame] | 20 | #define __ARCH_WANT_INTERRUPTS_ON_CTXSW |
| 21 | |
Michal Simek | 4511ec1 | 2009-03-27 14:25:37 +0100 | [diff] [blame] | 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 | |
Michal Simek | 4511ec1 | 2009-03-27 14:25:37 +0100 | [diff] [blame] | 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 | |
Michal Simek | a84642a | 2010-01-14 17:03:49 +0100 | [diff] [blame] | 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 | |
Michal Simek | 4511ec1 | 2009-03-27 14:25:37 +0100 | [diff] [blame] | 93 | #ifdef CONFIG_DEBUG_FS |
| 94 | extern struct dentry *of_debugfs_root; |
| 95 | #endif |
| 96 | |
| 97 | #define arch_align_stack(x) (x) |
| 98 | |
David S. Miller | e0e3328 | 2010-05-07 02:55:33 -0700 | [diff] [blame] | 99 | /* |
| 100 | * MicroBlaze doesn't handle unaligned accesses in hardware. |
| 101 | * |
| 102 | * Based on this we force the IP header alignment in network drivers. |
David S. Miller | e0e3328 | 2010-05-07 02:55:33 -0700 | [diff] [blame] | 103 | */ |
| 104 | #define NET_IP_ALIGN 2 |
David S. Miller | e0e3328 | 2010-05-07 02:55:33 -0700 | [diff] [blame] | 105 | |
Michal Simek | 4511ec1 | 2009-03-27 14:25:37 +0100 | [diff] [blame] | 106 | #endif /* _ASM_MICROBLAZE_SYSTEM_H */ |