Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
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
20#define __ARCH_WANT_INTERRUPTS_ON_CTXSW
21
22struct task_struct;
23struct thread_info;
24
25extern 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
48void show_trace(struct task_struct *task, unsigned long *stack);
49void __bad_xchg(volatile void *ptr, int size);
50
51static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
52 int size)
53{
54 unsigned long ret;
55 unsigned long flags;
56
57 switch (size) {
58 case 1:
59 local_irq_save(flags);
60 ret = *(volatile unsigned char *)ptr;
61 *(volatile unsigned char *)ptr = x;
62 local_irq_restore(flags);
63 break;
64
65 case 4:
66 local_irq_save(flags);
67 ret = *(volatile unsigned long *)ptr;
68 *(volatile unsigned long *)ptr = x;
69 local_irq_restore(flags);
70 break;
71 default:
72 __bad_xchg(ptr, size), ret = 0;
73 break;
74 }
75
76 return ret;
77}
78
79void disable_hlt(void);
80void enable_hlt(void);
81void default_idle(void);
82
83#define xchg(ptr, x) \
84 ((__typeof__(*(ptr))) __xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
85
86void free_init_pages(char *what, unsigned long begin, unsigned long end);
87void free_initmem(void);
88extern char *klimit;
89extern void ret_from_fork(void);
90
91extern void *alloc_maybe_bootmem(size_t size, gfp_t mask);
92extern void *zalloc_maybe_bootmem(size_t size, gfp_t mask);
93
94#ifdef CONFIG_DEBUG_FS
95extern struct dentry *of_debugfs_root;
96#endif
97
98#define arch_align_stack(x) (x)
99
100/*
101 * MicroBlaze doesn't handle unaligned accesses in hardware.
102 *
103 * Based on this we force the IP header alignment in network drivers.
104 * We also modify NET_SKB_PAD to be a cacheline in size, thus maintaining
105 * cacheline alignment of buffers.
106 */
107#define NET_IP_ALIGN 2
108#define NET_SKB_PAD L1_CACHE_BYTES
109
110#endif /* _ASM_MICROBLAZE_SYSTEM_H */