| Vineet Gupta | 95d6976 | 2013-01-18 15:12:19 +0530 | [diff] [blame^] | 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 |