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
29extern 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
33extern void __flush_icache_range(unsigned long, unsigned long);
34static inline void flush_icache_range(unsigned long start, unsigned long stop)
35{
36	if (!cpu_has_feature(CPU_FTR_COHERENT_ICACHE))
37		__flush_icache_range(start, stop);
38}
39
40extern void flush_icache_user_range(struct vm_area_struct *vma,
41				    struct page *page, unsigned long addr,
42				    int len);
43extern void __flush_dcache_icache(void *page_va);
44extern void flush_dcache_icache_page(struct page *page);
45#if defined(CONFIG_PPC32) && !defined(CONFIG_BOOKE)
46extern void __flush_dcache_icache_phys(unsigned long physaddr);
47#endif /* CONFIG_PPC32 && !CONFIG_BOOKE */
48
49extern void flush_dcache_range(unsigned long start, unsigned long stop);
50#ifdef CONFIG_PPC32
51extern void clean_dcache_range(unsigned long start, unsigned long stop);
52extern void invalidate_dcache_range(unsigned long start, unsigned long stop);
53#endif /* CONFIG_PPC32 */
54#ifdef CONFIG_PPC64
55extern void flush_inval_dcache_range(unsigned long start, unsigned long stop);
56extern void flush_dcache_phys_range(unsigned long start, unsigned long stop);
57#endif
58
59#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
60	do { \
61		memcpy(dst, src, len); \
62		flush_icache_user_range(vma, page, vaddr, len); \
63	} while (0)
64#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
65	memcpy(dst, src, len)
66
67
68
69#ifdef CONFIG_DEBUG_PAGEALLOC
70/* internal debugging function */
71void kernel_map_pages(struct page *page, int numpages, int enable);
72#endif
73
74#endif /* __KERNEL__ */
75
76#endif /* _ASM_POWERPC_CACHEFLUSH_H */