1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> 4 * Copyright (C) 2007-2009 PetaLogix 5 * Copyright (C) 2007 John Williams <john.williams@petalogix.com> 6 * based on v850 version which was 7 * Copyright (C) 2001,02,03 NEC Electronics Corporation 8 * Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org> 9 */ 10 11 #ifndef _ASM_MICROBLAZE_CACHEFLUSH_H 12 #define _ASM_MICROBLAZE_CACHEFLUSH_H 13 14 /* Somebody depends on this; sigh... */ 15 #include <linux/mm.h> 16 #include <linux/io.h> 17 18 /* Look at Documentation/core-api/cachetlb.rst */ 19 20 /* 21 * Cache handling functions. 22 * Microblaze has a write-through data cache, meaning that the data cache 23 * never needs to be flushed. The only flushing operations that are 24 * implemented are to invalidate the instruction cache. These are called 25 * after loading a user application into memory, we must invalidate the 26 * instruction cache to make sure we don't fetch old, bad code. 27 */ 28 29 /* struct cache, d=dcache, i=icache, fl = flush, iv = invalidate, 30 * suffix r = range */ 31 struct scache { 32 /* icache */ 33 void (*ie)(void); /* enable */ 34 void (*id)(void); /* disable */ 35 void (*ifl)(void); /* flush */ 36 void (*iflr)(unsigned long a, unsigned long b); 37 void (*iin)(void); /* invalidate */ 38 void (*iinr)(unsigned long a, unsigned long b); 39 /* dcache */ 40 void (*de)(void); /* enable */ 41 void (*dd)(void); /* disable */ 42 void (*dfl)(void); /* flush */ 43 void (*dflr)(unsigned long a, unsigned long b); 44 void (*din)(void); /* invalidate */ 45 void (*dinr)(unsigned long a, unsigned long b); 46 }; 47 48 /* microblaze cache */ 49 extern struct scache *mbc; 50 51 void microblaze_cache_init(void); 52 53 #define enable_icache() mbc->ie(); 54 #define disable_icache() mbc->id(); 55 #define flush_icache() mbc->ifl(); 56 #define flush_icache_range(start, end) mbc->iflr(start, end); 57 #define invalidate_icache() mbc->iin(); 58 #define invalidate_icache_range(start, end) mbc->iinr(start, end); 59 60 #define flush_icache_user_range(vma, pg, adr, len) flush_icache(); 61 #define flush_icache_page(vma, pg) do { } while (0) 62 63 #define enable_dcache() mbc->de(); 64 #define disable_dcache() mbc->dd(); 65 /* FIXME for LL-temac driver */ 66 #define invalidate_dcache() mbc->din(); 67 #define invalidate_dcache_range(start, end) mbc->dinr(start, end); 68 #define flush_dcache() mbc->dfl(); 69 #define flush_dcache_range(start, end) mbc->dflr(start, end); 70 71 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 72 /* MS: We have to implement it because of rootfs-jffs2 issue on WB */ 73 #define flush_dcache_page(page) \ 74 do { \ 75 unsigned long addr = (unsigned long) page_address(page); /* virtual */ \ 76 addr = (u32)virt_to_phys((void *)addr); \ 77 flush_dcache_range((unsigned) (addr), (unsigned) (addr) + PAGE_SIZE); \ 78 } while (0); 79 80 #define flush_dcache_mmap_lock(mapping) do { } while (0) 81 #define flush_dcache_mmap_unlock(mapping) do { } while (0) 82 83 #define flush_cache_dup_mm(mm) do { } while (0) 84 #define flush_cache_vmap(start, end) do { } while (0) 85 #define flush_cache_vunmap(start, end) do { } while (0) 86 #define flush_cache_mm(mm) do { } while (0) 87 88 #define flush_cache_page(vma, vmaddr, pfn) \ 89 flush_dcache_range(pfn << PAGE_SHIFT, (pfn << PAGE_SHIFT) + PAGE_SIZE); 90 91 /* MS: kgdb code use this macro, wrong len with FLASH */ 92 #if 0 93 #define flush_cache_range(vma, start, len) { \ 94 flush_icache_range((unsigned) (start), (unsigned) (start) + (len)); \ 95 flush_dcache_range((unsigned) (start), (unsigned) (start) + (len)); \ 96 } 97 #endif 98 99 #define flush_cache_range(vma, start, len) do { } while (0) 100 101 static inline void copy_to_user_page(struct vm_area_struct *vma, 102 struct page *page, unsigned long vaddr, 103 void *dst, void *src, int len) 104 { 105 u32 addr = virt_to_phys(dst); 106 memcpy(dst, src, len); 107 if (vma->vm_flags & VM_EXEC) { 108 invalidate_icache_range(addr, addr + PAGE_SIZE); 109 flush_dcache_range(addr, addr + PAGE_SIZE); 110 } 111 } 112 113 static inline void copy_from_user_page(struct vm_area_struct *vma, 114 struct page *page, unsigned long vaddr, 115 void *dst, void *src, int len) 116 { 117 memcpy(dst, src, len); 118 } 119 120 #endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */ 121