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_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)		\
60do {									\
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