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 
49 struct page;
50 struct mm_struct;
51 struct vm_area_struct;
52 
53 /* see arch/microblaze/kernel/cache.c */
54 extern void __invalidate_icache_all(void);
55 extern void __invalidate_icache_range(unsigned long start, unsigned long end);
56 extern void __invalidate_icache_page(struct vm_area_struct *vma,
57 				struct page *page);
58 extern void __invalidate_icache_user_range(struct vm_area_struct *vma,
59 				struct page *page,
60 				unsigned long adr, int len);
61 extern void __invalidate_cache_sigtramp(unsigned long addr);
62 
63 extern void __invalidate_dcache_all(void);
64 extern void __invalidate_dcache_range(unsigned long start, unsigned long end);
65 extern void __invalidate_dcache_page(struct vm_area_struct *vma,
66 				struct page *page);
67 extern void __invalidate_dcache_user_range(struct vm_area_struct *vma,
68 				struct page *page,
69 				unsigned long adr, int len);
70 
71 extern 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) \
78 do { 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 */
86