Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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_disable_L1(void);
34
35extern void __flush_icache_range(unsigned long, unsigned long);
36static inline void flush_icache_range(unsigned long start, unsigned long stop)
37{
38 if (!cpu_has_feature(CPU_FTR_COHERENT_ICACHE))
39 __flush_icache_range(start, stop);
40}
41
42extern void flush_icache_user_range(struct vm_area_struct *vma,
43 struct page *page, unsigned long addr,
44 int len);
45extern void __flush_dcache_icache(void *page_va);
46extern void flush_dcache_icache_page(struct page *page);
47#if defined(CONFIG_PPC32) && !defined(CONFIG_BOOKE)
48extern void __flush_dcache_icache_phys(unsigned long physaddr);
49#endif /* CONFIG_PPC32 && !CONFIG_BOOKE */
50
51extern void flush_dcache_range(unsigned long start, unsigned long stop);
52#ifdef CONFIG_PPC32
53extern void clean_dcache_range(unsigned long start, unsigned long stop);
54extern void invalidate_dcache_range(unsigned long start, unsigned long stop);
55#endif /* CONFIG_PPC32 */
56#ifdef CONFIG_PPC64
57extern void flush_inval_dcache_range(unsigned long start, unsigned long stop);
58extern void flush_dcache_phys_range(unsigned long start, unsigned long stop);
59#endif
60
61#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
62 do { \
63 memcpy(dst, src, len); \
64 flush_icache_user_range(vma, page, vaddr, len); \
65 } while (0)
66#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
67 memcpy(dst, src, len)
68
69
70
71#ifdef CONFIG_DEBUG_PAGEALLOC
72/* internal debugging function */
73void kernel_map_pages(struct page *page, int numpages, int enable);
74#endif
75
76#endif /* __KERNEL__ */
77
78#endif /* _ASM_POWERPC_CACHEFLUSH_H */