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1/*
2 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
3 * Copyright (C) 2007-2009 PetaLogix
4 * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
5 * based on v850 version which was
6 * Copyright (C) 2001,02,03 NEC Electronics Corporation
7 * Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org>
8 *
9 * This file is subject to the terms and conditions of the GNU General
10 * Public License. See the file COPYING in the main directory of this
11 * archive for more details.
12 *
13 */
14
15#ifndef _ASM_MICROBLAZE_CACHEFLUSH_H
16#define _ASM_MICROBLAZE_CACHEFLUSH_H
17
18/* Somebody depends on this; sigh... */
19#include <linux/mm.h>
20
21/*
22 * Cache handling functions.
23 * Microblaze has a write-through data cache, meaning that the data cache
24 * never needs to be flushed. The only flushing operations that are
25 * implemented are to invalidate the instruction cache. These are called
26 * after loading a user application into memory, we must invalidate the
27 * instruction cache to make sure we don't fetch old, bad code.
28 */
29
30/* FIXME for LL-temac driver */
31#define invalidate_dcache_range(start, end) \
32 __invalidate_dcache_range(start, end)
33
34#define flush_cache_all() __invalidate_cache_all()
35#define flush_cache_mm(mm) do { } while (0)
36#define flush_cache_range(vma, start, end) __invalidate_cache_all()
37#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
38
39#define flush_dcache_range(start, end) __invalidate_dcache_range(start, end)
40#define flush_dcache_page(page) do { } while (0)
41#define flush_dcache_mmap_lock(mapping) do { } while (0)
42#define flush_dcache_mmap_unlock(mapping) do { } while (0)
43
44#define flush_icache_range(start, len) __invalidate_icache_range(start, len)
45#define flush_icache_page(vma, pg) do { } while (0)
46
47#ifndef CONFIG_MMU
48# define flush_icache_user_range(start, len) do { } while (0)
49#else
50# define flush_icache_user_range(vma, pg, adr, len) __invalidate_icache_all()
51
52# define flush_page_to_ram(page) do { } while (0)
53
54# define flush_icache() __invalidate_icache_all()
55# define flush_cache_sigtramp(vaddr) \
56 __invalidate_icache_range(vaddr, vaddr + 8)
57
58# define flush_dcache_mmap_lock(mapping) do { } while (0)
59# define flush_dcache_mmap_unlock(mapping) do { } while (0)
60
61# define flush_cache_dup_mm(mm) do { } while (0)
62#endif
63
64#define flush_cache_vmap(start, end) do { } while (0)
65#define flush_cache_vunmap(start, end) do { } while (0)
66
67struct page;
68struct mm_struct;
69struct vm_area_struct;
70
71/* see arch/microblaze/kernel/cache.c */
72extern void __invalidate_icache_all(void);
73extern void __invalidate_icache_range(unsigned long start, unsigned long end);
74extern void __invalidate_icache_page(struct vm_area_struct *vma,
75 struct page *page);
76extern void __invalidate_icache_user_range(struct vm_area_struct *vma,
77 struct page *page,
78 unsigned long adr, int len);
79extern void __invalidate_cache_sigtramp(unsigned long addr);
80
81extern void __invalidate_dcache_all(void);
82extern void __invalidate_dcache_range(unsigned long start, unsigned long end);
83extern void __invalidate_dcache_page(struct vm_area_struct *vma,
84 struct page *page);
85extern void __invalidate_dcache_user_range(struct vm_area_struct *vma,
86 struct page *page,
87 unsigned long adr, int len);
88
89extern inline void __invalidate_cache_all(void)
90{
91 __invalidate_icache_all();
92 __invalidate_dcache_all();
93}
94
95#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
96do { memcpy((dst), (src), (len)); \
97 flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \
98} while (0)
99
100#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
101 memcpy((dst), (src), (len))
102
103#endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */