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
21 void flush_cache_all(void);
22
23 void flush_icache_range(unsigned long kstart, unsigned long kend);
24 void __sync_icache_dcache(phys_addr_t paddr, unsigned long vaddr, int len);
25 void __inv_icache_pages(phys_addr_t paddr, unsigned long vaddr, unsigned nr);
26 void __flush_dcache_pages(phys_addr_t paddr, unsigned long vaddr, unsigned nr);
27
28 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
29
30 void flush_dcache_page(struct page *page);
31 void flush_dcache_folio(struct folio *folio);
32 #define flush_dcache_folio flush_dcache_folio
33
34 void dma_cache_wback_inv(phys_addr_t start, unsigned long sz);
35 void dma_cache_inv(phys_addr_t start, unsigned long sz);
36 void 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_vmap_early(start, end) do { } while (0)
44 #define flush_cache_vunmap(start, end) flush_cache_all()
45
46 #define flush_cache_dup_mm(mm) /* called on fork (VIVT only) */
47
48 #define flush_cache_mm(mm) /* called on munmap/exit */
49 #define flush_cache_range(mm, u_vstart, u_vend)
50 #define flush_cache_page(vma, u_vaddr, pfn) /* PF handling/COW-break */
51
52 /*
53 * A new pagecache page has PG_arch_1 clear - thus dcache dirty by default
54 * This works around some PIO based drivers which don't call flush_dcache_page
55 * to record that they dirtied the dcache
56 */
57 #define PG_dc_clean PG_arch_1
58
59 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
60 do { \
61 memcpy(dst, src, len); \
62 if (vma->vm_flags & VM_EXEC) \
63 __sync_icache_dcache((unsigned long)(dst), vaddr, len); \
64 } while (0)
65
66 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
67 memcpy(dst, src, len); \
68
69 #endif
70
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