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
28extern void flush_dcache_page(struct page *page);
29#define flush_dcache_mmap_lock(mapping)		do { } while (0)
30#define flush_dcache_mmap_unlock(mapping)	do { } while (0)
31
32extern void __flush_icache_range(unsigned long, unsigned long);
33static inline void flush_icache_range(unsigned long start, unsigned long stop)
34{
35	if (!cpu_has_feature(CPU_FTR_COHERENT_ICACHE))
36		__flush_icache_range(start, stop);
37}
38
39extern void flush_icache_user_range(struct vm_area_struct *vma,
40				    struct page *page, unsigned long addr,
41				    int len);
42extern void __flush_dcache_icache(void *page_va);
43extern void flush_dcache_icache_page(struct page *page);
44#if defined(CONFIG_PPC32) && !defined(CONFIG_BOOKE)
45extern void __flush_dcache_icache_phys(unsigned long physaddr);
46#endif /* CONFIG_PPC32 && !CONFIG_BOOKE */
47
48extern void flush_dcache_range(unsigned long start, unsigned long stop);
49#ifdef CONFIG_PPC32
50extern void clean_dcache_range(unsigned long start, unsigned long stop);
51extern void invalidate_dcache_range(unsigned long start, unsigned long stop);
52#endif /* CONFIG_PPC32 */
53#ifdef CONFIG_PPC64
54extern void flush_inval_dcache_range(unsigned long start, unsigned long stop);
55extern void flush_dcache_phys_range(unsigned long start, unsigned long stop);
56#endif
57
58#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
59	do { \
60		memcpy(dst, src, len); \
61		flush_icache_user_range(vma, page, vaddr, len); \
62	} while (0)
63#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
64	memcpy(dst, src, len)
65
66
67
68#ifdef CONFIG_DEBUG_PAGEALLOC
69/* internal debugging function */
70void kernel_map_pages(struct page *page, int numpages, int enable);
71#endif
72
73#endif /* __KERNEL__ */
74
75#endif /* _ASM_POWERPC_CACHEFLUSH_H */
76