/* SPDX-License-Identifier: GPL-2.0-only *//* * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) * *  vineetg: May 2011: for Non-aliasing VIPT D-cache following can be NOPs *   -flush_cache_dup_mm (fork) *   -likewise for flush_cache_mm (exit/execve) *   -likewise for flush_cache_{range,page} (munmap, exit, COW-break) * *  vineetg: April 2008 *   -Added a critical CacheLine flush to copy_to_user_page( ) which *     was causing gdbserver to not setup breakpoints consistently */ #ifndef _ASM_CACHEFLUSH_H#define _ASM_CACHEFLUSH_H #include <linux/mm.h>#include <asm/shmparam.h> void flush_cache_all(void); void flush_icache_range(unsigned long kstart, unsigned long kend);void __sync_icache_dcache(phys_addr_t paddr, unsigned long vaddr, int len);void __inv_icache_pages(phys_addr_t paddr, unsigned long vaddr, unsigned nr);void __flush_dcache_pages(phys_addr_t paddr, unsigned long vaddr, unsigned nr); #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 void flush_dcache_page(struct page *page);void flush_dcache_folio(struct folio *folio);#define flush_dcache_folio flush_dcache_folio void dma_cache_wback_inv(phys_addr_t start, unsigned long sz);void dma_cache_inv(phys_addr_t start, unsigned long sz);void dma_cache_wback(phys_addr_t start, unsigned long sz); #define flush_dcache_mmap_lock(mapping)		do { } while (0)#define flush_dcache_mmap_unlock(mapping)	do { } while (0) /* TBD: optimize this */#define flush_cache_vmap(start, end)		flush_cache_all()#define flush_cache_vmap_early(start, end)	do { } while (0)#define flush_cache_vunmap(start, end)		flush_cache_all() #define flush_cache_dup_mm(mm)			/* called on fork (VIVT only) */ #define flush_cache_mm(mm)			/* called on munmap/exit */#define flush_cache_range(mm, u_vstart, u_vend)#define flush_cache_page(vma, u_vaddr, pfn)	/* PF handling/COW-break */ /* * A new pagecache page has PG_arch_1 clear - thus dcache dirty by default * This works around some PIO based drivers which don't call flush_dcache_page * to record that they dirtied the dcache */#define PG_dc_clean	PG_arch_1 #define copy_to_user_page(vma, page, vaddr, dst, src, len)		\do {									\	memcpy(dst, src, len);						\	if (vma->vm_flags & VM_EXEC)					\		__sync_icache_dcache((unsigned long)(dst), vaddr, len);	\} while (0) #define copy_from_user_page(vma, page, vaddr, dst, src, len)		\	memcpy(dst, src, len);						\ #endif