1 /*
2  *  This program is free software; you can redistribute it and/or
3  *  modify it under the terms of the GNU General Public License
4  *  as published by the Free Software Foundation; either version
5  *  2 of the License, or (at your option) any later version.
6  */
7 #ifndef _ASM_POWERPC_CACHEFLUSH_H
8 #define _ASM_POWERPC_CACHEFLUSH_H
9 
10 #ifdef __KERNEL__
11 
12 #include <linux/mm.h>
13 #include <asm/cputable.h>
14 
15 /*
16  * No cache flushing is required when address mappings are changed,
17  * because the caches on PowerPCs are physically addressed.
18  */
19 #define flush_cache_all()			do { } while (0)
20 #define flush_cache_mm(mm)			do { } while (0)
21 #define flush_cache_dup_mm(mm)			do { } while (0)
22 #define flush_cache_range(vma, start, end)	do { } while (0)
23 #define flush_cache_page(vma, vmaddr, pfn)	do { } while (0)
24 #define flush_icache_page(vma, page)		do { } while (0)
25 #define flush_cache_vmap(start, end)		do { } while (0)
26 #define flush_cache_vunmap(start, end)		do { } while (0)
27 
28 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
29 extern void flush_dcache_page(struct page *page);
30 #define flush_dcache_mmap_lock(mapping)		do { } while (0)
31 #define flush_dcache_mmap_unlock(mapping)	do { } while (0)
32 
33 extern void __flush_disable_L1(void);
34 
35 extern void flush_icache_range(unsigned long, unsigned long);
36 extern void flush_icache_user_range(struct vm_area_struct *vma,
37 				    struct page *page, unsigned long addr,
38 				    int len);
39 extern void __flush_dcache_icache(void *page_va);
40 extern void flush_dcache_icache_page(struct page *page);
41 #if defined(CONFIG_PPC32) && !defined(CONFIG_BOOKE)
42 extern void __flush_dcache_icache_phys(unsigned long physaddr);
43 #endif /* CONFIG_PPC32 && !CONFIG_BOOKE */
44 
45 extern void flush_dcache_range(unsigned long start, unsigned long stop);
46 #ifdef CONFIG_PPC32
47 extern void clean_dcache_range(unsigned long start, unsigned long stop);
48 extern void invalidate_dcache_range(unsigned long start, unsigned long stop);
49 #endif /* CONFIG_PPC32 */
50 #ifdef CONFIG_PPC64
51 extern void flush_inval_dcache_range(unsigned long start, unsigned long stop);
52 extern void flush_dcache_phys_range(unsigned long start, unsigned long stop);
53 #endif
54 
55 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
56 	do { \
57 		memcpy(dst, src, len); \
58 		flush_icache_user_range(vma, page, vaddr, len); \
59 	} while (0)
60 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
61 	memcpy(dst, src, len)
62 
63 
64 
65 #ifdef CONFIG_DEBUG_PAGEALLOC
66 /* internal debugging function */
67 void kernel_map_pages(struct page *page, int numpages, int enable);
68 #endif
69 
70 #endif /* __KERNEL__ */
71 
72 #endif /* _ASM_POWERPC_CACHEFLUSH_H */
73