Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
4 *
5 * vineetg: May 2011: for Non-aliasing VIPT D-cache following can be NOPs
6 * -flush_cache_dup_mm (fork)
7 * -likewise for flush_cache_mm (exit/execve)
8 * -likewise for flush_cache_{range,page} (munmap, exit, COW-break)
9 *
10 * vineetg: April 2008
11 * -Added a critical CacheLine flush to copy_to_user_page( ) which
12 * was causing gdbserver to not setup breakpoints consistently
13 */
14
15#ifndef _ASM_CACHEFLUSH_H
16#define _ASM_CACHEFLUSH_H
17
18#include <linux/mm.h>
19#include <asm/shmparam.h>
20
21void flush_cache_all(void);
22
23void flush_icache_range(unsigned long kstart, unsigned long kend);
24void __sync_icache_dcache(phys_addr_t paddr, unsigned long vaddr, int len);
25void __inv_icache_pages(phys_addr_t paddr, unsigned long vaddr, unsigned nr);
26void __flush_dcache_pages(phys_addr_t paddr, unsigned long vaddr, unsigned nr);
27
28#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
29
30void flush_dcache_page(struct page *page);
31void flush_dcache_folio(struct folio *folio);
32#define flush_dcache_folio flush_dcache_folio
33
34void dma_cache_wback_inv(phys_addr_t start, unsigned long sz);
35void dma_cache_inv(phys_addr_t start, unsigned long sz);
36void dma_cache_wback(phys_addr_t 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#define flush_cache_dup_mm(mm) /* called on fork (VIVT only) */
46
47#define flush_cache_mm(mm) /* called on munmap/exit */
48#define flush_cache_range(mm, u_vstart, u_vend)
49#define flush_cache_page(vma, u_vaddr, pfn) /* PF handling/COW-break */
50
51/*
52 * A new pagecache page has PG_arch_1 clear - thus dcache dirty by default
53 * This works around some PIO based drivers which don't call flush_dcache_page
54 * to record that they dirtied the dcache
55 */
56#define PG_dc_clean PG_arch_1
57
58#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
59do { \
60 memcpy(dst, src, len); \
61 if (vma->vm_flags & VM_EXEC) \
62 __sync_icache_dcache((unsigned long)(dst), vaddr, len); \
63} while (0)
64
65#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
66 memcpy(dst, src, len); \
67
68#endif