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>
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.
15 #ifndef _ASM_MICROBLAZE_CACHEFLUSH_H
16 #define _ASM_MICROBLAZE_CACHEFLUSH_H
18 /* Somebody depends on this; sigh... */
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.
30 /* FIXME for LL-temac driver */
31 #define invalidate_dcache_range(start, end) \
32 __invalidate_dcache_range(start, end)
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)
39 #define flush_dcache_range(start, end) __invalidate_dcache_range(start, end)
40 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
41 #define flush_dcache_page(page) do { } while (0)
42 #define flush_dcache_mmap_lock(mapping) do { } while (0)
43 #define flush_dcache_mmap_unlock(mapping) do { } while (0)
45 #define flush_icache_range(start, len) __invalidate_icache_range(start, len)
46 #define flush_icache_page(vma, pg) do { } while (0)
49 # define flush_icache_user_range(start, len) do { } while (0)
51 # define flush_icache_user_range(vma, pg, adr, len) __invalidate_icache_all()
53 # define flush_page_to_ram(page) do { } while (0)
55 # define flush_icache() __invalidate_icache_all()
56 # define flush_cache_sigtramp(vaddr) \
57 __invalidate_icache_range(vaddr, vaddr + 8)
59 # define flush_dcache_mmap_lock(mapping) do { } while (0)
60 # define flush_dcache_mmap_unlock(mapping) do { } while (0)
62 # define flush_cache_dup_mm(mm) do { } while (0)
65 #define flush_cache_vmap(start, end) do { } while (0)
66 #define flush_cache_vunmap(start, end) do { } while (0)
69 void _enable_icache(void);
70 void _disable_icache(void);
71 void _invalidate_icache(unsigned int addr);
73 #define __enable_icache() _enable_icache()
74 #define __disable_icache() _disable_icache()
75 #define __invalidate_icache(addr) _invalidate_icache(addr)
77 void _enable_dcache(void);
78 void _disable_dcache(void);
79 void _invalidate_dcache(unsigned int addr);
81 #define __enable_dcache() _enable_dcache()
82 #define __disable_dcache() _disable_dcache()
83 #define __invalidate_dcache(addr) _invalidate_dcache(addr)
87 struct vm_area_struct;
89 /* see arch/microblaze/kernel/cache.c */
90 extern void __invalidate_icache_all(void);
91 extern void __invalidate_icache_range(unsigned long start, unsigned long end);
92 extern void __invalidate_icache_page(struct vm_area_struct *vma,
94 extern void __invalidate_icache_user_range(struct vm_area_struct *vma,
96 unsigned long adr, int len);
97 extern void __invalidate_cache_sigtramp(unsigned long addr);
99 extern void __invalidate_dcache_all(void);
100 extern void __invalidate_dcache_range(unsigned long start, unsigned long end);
101 extern void __invalidate_dcache_page(struct vm_area_struct *vma,
103 extern void __invalidate_dcache_user_range(struct vm_area_struct *vma,
105 unsigned long adr, int len);
107 extern inline void __invalidate_cache_all(void)
109 __invalidate_icache_all();
110 __invalidate_dcache_all();
113 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
114 do { memcpy((dst), (src), (len)); \
115 flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \
118 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
119 memcpy((dst), (src), (len))
121 #endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */