Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * vineetg: May 2011: for Non-aliasing VIPT D-cache following can be NOPs
9 * -flush_cache_dup_mm (fork)
10 * -likewise for flush_cache_mm (exit/execve)
11 * -likewise for flush_cache_{range,page} (munmap, exit, COW-break)
12 *
13 * vineetg: April 2008
14 * -Added a critical CacheLine flush to copy_to_user_page( ) which
15 * was causing gdbserver to not setup breakpoints consistently
16 */
17
18#ifndef _ASM_CACHEFLUSH_H
19#define _ASM_CACHEFLUSH_H
20
21#include <linux/mm.h>
22
23void flush_cache_all(void);
24
25void flush_icache_range(unsigned long start, unsigned long end);
26void flush_icache_page(struct vm_area_struct *vma, struct page *page);
27void flush_icache_range_vaddr(unsigned long paddr, unsigned long u_vaddr,
28 int len);
29
30#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
31
32void flush_dcache_page(struct page *page);
33
34void dma_cache_wback_inv(unsigned long start, unsigned long sz);
35void dma_cache_inv(unsigned long start, unsigned long sz);
36void dma_cache_wback(unsigned long start, unsigned long sz);
37
38#define flush_dcache_mmap_lock(mapping) do { } while (0)
39#define flush_dcache_mmap_unlock(mapping) do { } while (0)
40
41/* TBD: optimize this */
42#define flush_cache_vmap(start, end) flush_cache_all()
43#define flush_cache_vunmap(start, end) flush_cache_all()
44
45/*
46 * VM callbacks when entire/range of user-space V-P mappings are
47 * torn-down/get-invalidated
48 *
49 * Currently we don't support D$ aliasing configs for our VIPT caches
50 * NOPS for VIPT Cache with non-aliasing D$ configurations only
51 */
52#define flush_cache_dup_mm(mm) /* called on fork */
53#define flush_cache_mm(mm) /* called on munmap/exit */
54#define flush_cache_range(mm, u_vstart, u_vend)
55#define flush_cache_page(vma, u_vaddr, pfn) /* PF handling/COW-break */
56
57#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
58do { \
59 memcpy(dst, src, len); \
60 if (vma->vm_flags & VM_EXEC) \
61 flush_icache_range_vaddr((unsigned long)(dst), vaddr, len);\
62} while (0)
63
64#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
65 memcpy(dst, src, len); \
66
67#endif