Linux kernel mirror (for testing)
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1/*
2 * Copyright (C) 2007 PetaLogix
3 * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
4 * based on v850 version which was
5 * Copyright (C) 2001,02,03 NEC Electronics Corporation
6 * Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org>
7 *
8 * This file is subject to the terms and conditions of the GNU General
9 * Public License. See the file COPYING in the main directory of this
10 * archive for more details.
11 *
12 */
13
14#ifndef _ASM_MICROBLAZE_CACHEFLUSH_H
15#define _ASM_MICROBLAZE_CACHEFLUSH_H
16
17/* Somebody depends on this; sigh... */
18#include <linux/mm.h>
19
20/*
21 * Cache handling functions.
22 * Microblaze has a write-through data cache, meaning that the data cache
23 * never needs to be flushed. The only flushing operations that are
24 * implemented are to invalidate the instruction cache. These are called
25 * after loading a user application into memory, we must invalidate the
26 * instruction cache to make sure we don't fetch old, bad code.
27 */
28
29/* FIXME for LL-temac driver */
30#define invalidate_dcache_range(start, end) \
31 __invalidate_dcache_range(start, end)
32
33#define flush_cache_all() __invalidate_cache_all()
34#define flush_cache_mm(mm) do { } while (0)
35#define flush_cache_range(vma, start, end) __invalidate_cache_all()
36#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
37
38#define flush_dcache_range(start, end) __invalidate_dcache_range(start, end)
39#define flush_dcache_page(page) do { } while (0)
40#define flush_dcache_mmap_lock(mapping) do { } while (0)
41#define flush_dcache_mmap_unlock(mapping) do { } while (0)
42
43#define flush_icache_range(start, len) __invalidate_icache_range(start, len)
44#define flush_icache_page(vma, pg) do { } while (0)
45
46#define flush_cache_vmap(start, end) do { } while (0)
47#define flush_cache_vunmap(start, end) do { } while (0)
48
49struct page;
50struct mm_struct;
51struct vm_area_struct;
52
53/* see arch/microblaze/kernel/cache.c */
54extern void __invalidate_icache_all(void);
55extern void __invalidate_icache_range(unsigned long start, unsigned long end);
56extern void __invalidate_icache_page(struct vm_area_struct *vma,
57 struct page *page);
58extern void __invalidate_icache_user_range(struct vm_area_struct *vma,
59 struct page *page,
60 unsigned long adr, int len);
61extern void __invalidate_cache_sigtramp(unsigned long addr);
62
63extern void __invalidate_dcache_all(void);
64extern void __invalidate_dcache_range(unsigned long start, unsigned long end);
65extern void __invalidate_dcache_page(struct vm_area_struct *vma,
66 struct page *page);
67extern void __invalidate_dcache_user_range(struct vm_area_struct *vma,
68 struct page *page,
69 unsigned long adr, int len);
70
71extern inline void __invalidate_cache_all(void)
72{
73 __invalidate_icache_all();
74 __invalidate_dcache_all();
75}
76
77#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
78do { memcpy((dst), (src), (len)); \
79 flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \
80} while (0)
81
82#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
83 memcpy((dst), (src), (len))
84
85#endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */