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 #include <linux/io.h> 21 22 /* Look at Documentation/cachetlb.txt */ 23 24 /* 25 * Cache handling functions. 26 * Microblaze has a write-through data cache, meaning that the data cache 27 * never needs to be flushed. The only flushing operations that are 28 * implemented are to invalidate the instruction cache. These are called 29 * after loading a user application into memory, we must invalidate the 30 * instruction cache to make sure we don't fetch old, bad code. 31 */ 32 33 /* struct cache, d=dcache, i=icache, fl = flush, iv = invalidate, 34 * suffix r = range */ 35 struct scache { 36 /* icache */ 37 void (*ie)(void); /* enable */ 38 void (*id)(void); /* disable */ 39 void (*ifl)(void); /* flush */ 40 void (*iflr)(unsigned long a, unsigned long b); 41 void (*iin)(void); /* invalidate */ 42 void (*iinr)(unsigned long a, unsigned long b); 43 /* dcache */ 44 void (*de)(void); /* enable */ 45 void (*dd)(void); /* disable */ 46 void (*dfl)(void); /* flush */ 47 void (*dflr)(unsigned long a, unsigned long b); 48 void (*din)(void); /* invalidate */ 49 void (*dinr)(unsigned long a, unsigned long b); 50 }; 51 52 /* microblaze cache */ 53 extern struct scache *mbc; 54 55 void microblaze_cache_init(void); 56 57 #define enable_icache() mbc->ie(); 58 #define disable_icache() mbc->id(); 59 #define flush_icache() mbc->ifl(); 60 #define flush_icache_range(start, end) mbc->iflr(start, end); 61 #define invalidate_icache() mbc->iin(); 62 #define invalidate_icache_range(start, end) mbc->iinr(start, end); 63 64 #define flush_icache_user_range(vma, pg, adr, len) flush_icache(); 65 #define flush_icache_page(vma, pg) do { } while (0) 66 67 #define enable_dcache() mbc->de(); 68 #define disable_dcache() mbc->dd(); 69 /* FIXME for LL-temac driver */ 70 #define invalidate_dcache() mbc->din(); 71 #define invalidate_dcache_range(start, end) mbc->dinr(start, end); 72 #define flush_dcache() mbc->dfl(); 73 #define flush_dcache_range(start, end) mbc->dflr(start, end); 74 75 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 76 /* MS: We have to implement it because of rootfs-jffs2 issue on WB */ 77 #define flush_dcache_page(page) \ 78 do { \ 79 unsigned long addr = (unsigned long) page_address(page); /* virtual */ \ 80 addr = (u32)virt_to_phys((void *)addr); \ 81 flush_dcache_range((unsigned) (addr), (unsigned) (addr) + PAGE_SIZE); \ 82 } while (0); 83 84 #define flush_dcache_mmap_lock(mapping) do { } while (0) 85 #define flush_dcache_mmap_unlock(mapping) do { } while (0) 86 87 #define flush_cache_dup_mm(mm) do { } while (0) 88 #define flush_cache_vmap(start, end) do { } while (0) 89 #define flush_cache_vunmap(start, end) do { } while (0) 90 #define flush_cache_mm(mm) do { } while (0) 91 92 #define flush_cache_page(vma, vmaddr, pfn) \ 93 flush_dcache_range(pfn << PAGE_SHIFT, (pfn << PAGE_SHIFT) + PAGE_SIZE); 94 95 /* MS: kgdb code use this macro, wrong len with FLASH */ 96 #if 0 97 #define flush_cache_range(vma, start, len) { \ 98 flush_icache_range((unsigned) (start), (unsigned) (start) + (len)); \ 99 flush_dcache_range((unsigned) (start), (unsigned) (start) + (len)); \ 100 } 101 #endif 102 103 #define flush_cache_range(vma, start, len) do { } while (0) 104 105 static inline void copy_to_user_page(struct vm_area_struct *vma, 106 struct page *page, unsigned long vaddr, 107 void *dst, void *src, int len) 108 { 109 u32 addr = virt_to_phys(dst); 110 memcpy(dst, src, len); 111 if (vma->vm_flags & VM_EXEC) { 112 invalidate_icache_range(addr, addr + PAGE_SIZE); 113 flush_dcache_range(addr, addr + PAGE_SIZE); 114 } 115 } 116 117 static inline void copy_from_user_page(struct vm_area_struct *vma, 118 struct page *page, unsigned long vaddr, 119 void *dst, void *src, int len) 120 { 121 memcpy(dst, src, len); 122 } 123 124 #endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */ 125