/* 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_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