1 /* 2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * vineetg: May 2011: for Non-aliasing VIPT D-cache following can be NOPs 9 * -flush_cache_dup_mm (fork) 10 * -likewise for flush_cache_mm (exit/execve) 11 * -likewise for flush_cache_{range,page} (munmap, exit, COW-break) 12 * 13 * vineetg: April 2008 14 * -Added a critical CacheLine flush to copy_to_user_page( ) which 15 * was causing gdbserver to not setup breakpoints consistently 16 */ 17 18 #ifndef _ASM_CACHEFLUSH_H 19 #define _ASM_CACHEFLUSH_H 20 21 #include <linux/mm.h> 22 23 void flush_cache_all(void); 24 25 void flush_icache_range(unsigned long start, unsigned long end); 26 void flush_icache_page(struct vm_area_struct *vma, struct page *page); 27 void flush_icache_range_vaddr(unsigned long paddr, unsigned long u_vaddr, 28 int len); 29 30 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 31 32 void flush_dcache_page(struct page *page); 33 34 void dma_cache_wback_inv(unsigned long start, unsigned long sz); 35 void dma_cache_inv(unsigned long start, unsigned long sz); 36 void dma_cache_wback(unsigned long 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 /* 46 * VM callbacks when entire/range of user-space V-P mappings are 47 * torn-down/get-invalidated 48 * 49 * Currently we don't support D$ aliasing configs for our VIPT caches 50 * NOPS for VIPT Cache with non-aliasing D$ configurations only 51 */ 52 #define flush_cache_dup_mm(mm) /* called on fork */ 53 #define flush_cache_mm(mm) /* called on munmap/exit */ 54 #define flush_cache_range(mm, u_vstart, u_vend) 55 #define flush_cache_page(vma, u_vaddr, pfn) /* PF handling/COW-break */ 56 57 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ 58 do { \ 59 memcpy(dst, src, len); \ 60 if (vma->vm_flags & VM_EXEC) \ 61 flush_icache_range_vaddr((unsigned long)(dst), vaddr, len);\ 62 } while (0) 63 64 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ 65 memcpy(dst, src, len); \ 66 67 #endif 68