1 /* 2 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> 3 * Copyright (C) 2007-2009 PetaLogix 4 * Copyright (C) 2007 John Williams <john.williams@petalogix.com> 5 * based on v850 version which was 6 * Copyright (C) 2001,02,03 NEC Electronics Corporation 7 * Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org> 8 * 9 * This file is subject to the terms and conditions of the GNU General 10 * Public License. See the file COPYING in the main directory of this 11 * archive for more details. 12 * 13 */ 14 15 #ifndef _ASM_MICROBLAZE_CACHEFLUSH_H 16 #define _ASM_MICROBLAZE_CACHEFLUSH_H 17 18 /* Somebody depends on this; sigh... */ 19 #include <linux/mm.h> 20 21 /* 22 * Cache handling functions. 23 * Microblaze has a write-through data cache, meaning that the data cache 24 * never needs to be flushed. The only flushing operations that are 25 * implemented are to invalidate the instruction cache. These are called 26 * after loading a user application into memory, we must invalidate the 27 * instruction cache to make sure we don't fetch old, bad code. 28 */ 29 30 /* FIXME for LL-temac driver */ 31 #define invalidate_dcache_range(start, end) \ 32 __invalidate_dcache_range(start, end) 33 34 #define flush_cache_all() __invalidate_cache_all() 35 #define flush_cache_mm(mm) do { } while (0) 36 #define flush_cache_range(vma, start, end) __invalidate_cache_all() 37 #define flush_cache_page(vma, vmaddr, pfn) do { } while (0) 38 39 #define flush_dcache_range(start, end) __invalidate_dcache_range(start, end) 40 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 41 #define flush_dcache_page(page) do { } while (0) 42 #define flush_dcache_mmap_lock(mapping) do { } while (0) 43 #define flush_dcache_mmap_unlock(mapping) do { } while (0) 44 45 #define flush_icache_range(start, len) __invalidate_icache_range(start, len) 46 #define flush_icache_page(vma, pg) do { } while (0) 47 48 #ifndef CONFIG_MMU 49 # define flush_icache_user_range(start, len) do { } while (0) 50 #else 51 # define flush_icache_user_range(vma, pg, adr, len) __invalidate_icache_all() 52 53 # define flush_page_to_ram(page) do { } while (0) 54 55 # define flush_icache() __invalidate_icache_all() 56 # define flush_cache_sigtramp(vaddr) \ 57 __invalidate_icache_range(vaddr, vaddr + 8) 58 59 # define flush_dcache_mmap_lock(mapping) do { } while (0) 60 # define flush_dcache_mmap_unlock(mapping) do { } while (0) 61 62 # define flush_cache_dup_mm(mm) do { } while (0) 63 #endif 64 65 #define flush_cache_vmap(start, end) do { } while (0) 66 #define flush_cache_vunmap(start, end) do { } while (0) 67 68 struct page; 69 struct mm_struct; 70 struct vm_area_struct; 71 72 /* see arch/microblaze/kernel/cache.c */ 73 extern void __invalidate_icache_all(void); 74 extern void __invalidate_icache_range(unsigned long start, unsigned long end); 75 extern void __invalidate_icache_page(struct vm_area_struct *vma, 76 struct page *page); 77 extern void __invalidate_icache_user_range(struct vm_area_struct *vma, 78 struct page *page, 79 unsigned long adr, int len); 80 extern void __invalidate_cache_sigtramp(unsigned long addr); 81 82 extern void __invalidate_dcache_all(void); 83 extern void __invalidate_dcache_range(unsigned long start, unsigned long end); 84 extern void __invalidate_dcache_page(struct vm_area_struct *vma, 85 struct page *page); 86 extern void __invalidate_dcache_user_range(struct vm_area_struct *vma, 87 struct page *page, 88 unsigned long adr, int len); 89 90 extern inline void __invalidate_cache_all(void) 91 { 92 __invalidate_icache_all(); 93 __invalidate_dcache_all(); 94 } 95 96 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ 97 do { memcpy((dst), (src), (len)); \ 98 flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \ 99 } while (0) 100 101 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ 102 memcpy((dst), (src), (len)) 103 104 #endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */ 105