| 1 | |
| 2 | *
|
| 3 | * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
|
| 4 | * Written by David Howells ([email protected])
|
| 5 | *
|
| 6 | * This program is free software; you can redistribute it and/or
|
| 7 | * modify it under the terms of the GNU General Public License
|
| 8 | * as published by the Free Software Foundation; either version
|
| 9 | * 2 of the License, or (at your option) any later version.
|
| 10 |
|
| 11 |
|
| 12 | #ifndef _ASM_CACHEFLUSH_H
|
| 13 | #define _ASM_CACHEFLUSH_H
|
| 14 |
|
| 15 |
|
| 16 | #include <linux/mm.h>
|
| 17 |
|
| 18 | |
| 19 | * virtually-indexed cache management (our cache is physically indexed)
|
| 20 |
|
| 21 | #define flush_cache_all() do {} while(0)
|
| 22 | #define flush_cache_mm(mm) do {} while(0)
|
| 23 | #define flush_cache_dup_mm(mm) do {} while(0)
|
| 24 | #define flush_cache_range(mm, start, end) do {} while(0)
|
| 25 | #define flush_cache_page(vma, vmaddr, pfn) do {} while(0)
|
| 26 | #define flush_cache_vmap(start, end) do {} while(0)
|
| 27 | #define flush_cache_vunmap(start, end) do {} while(0)
|
| 28 | #define flush_dcache_mmap_lock(mapping) do {} while(0)
|
| 29 | #define flush_dcache_mmap_unlock(mapping) do {} while(0)
|
| 30 |
|
| 31 | |
| 32 | * physically-indexed cache managment
|
| 33 | * - see arch/frv/lib/cache.S
|
| 34 |
|
| 35 | extern void frv_dcache_writeback(unsigned long start, unsigned long size);
|
| 36 | extern void frv_cache_invalidate(unsigned long start, unsigned long size);
|
| 37 | extern void frv_icache_invalidate(unsigned long start, unsigned long size);
|
| 38 | extern void frv_cache_wback_inv(unsigned long start, unsigned long size);
|
| 39 |
|
| 40 | static inline void __flush_cache_all(void)
|
| 41 | {
|
| 42 | asm volatile(" dcef @(gr0,gr0),#1 \n"
|
| 43 | " icei @(gr0,gr0),#1 \n"
|
| 44 | " membar \n"
|
| 45 | : : : "memory"
|
| 46 | );
|
| 47 | }
|
| 48 |
|
| 49 |
|
| 50 | #ifdef CONFIG_MMU
|
| 51 | extern void flush_dcache_page(struct page *page);
|
| 52 | #else
|
| 53 | static inline void flush_dcache_page(struct page *page)
|
| 54 | {
|
| 55 | unsigned long addr = page_to_phys(page);
|
| 56 | frv_dcache_writeback(addr, addr + PAGE_SIZE);
|
| 57 | }
|
| 58 | #endif
|
| 59 |
|
| 60 | static inline void flush_page_to_ram(struct page *page)
|
| 61 | {
|
| 62 | flush_dcache_page(page);
|
| 63 | }
|
| 64 |
|
| 65 | static inline void flush_icache(void)
|
| 66 | {
|
| 67 | __flush_cache_all();
|
| 68 | }
|
| 69 |
|
| 70 | static inline void flush_icache_range(unsigned long start, unsigned long end)
|
| 71 | {
|
| 72 | frv_cache_wback_inv(start, end);
|
| 73 | }
|
| 74 |
|
| 75 | #ifdef CONFIG_MMU
|
| 76 | extern void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
|
| 77 | unsigned long start, unsigned long len);
|
| 78 | #else
|
| 79 | static inline void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
|
| 80 | unsigned long start, unsigned long len)
|
| 81 | {
|
| 82 | frv_cache_wback_inv(start, start + len);
|
| 83 | }
|
| 84 | #endif
|
| 85 |
|
| 86 | static inline void flush_icache_page(struct vm_area_struct *vma, struct page *page)
|
| 87 | {
|
| 88 | flush_icache_user_range(vma, page, page_to_phys(page), PAGE_SIZE);
|
| 89 | }
|
| 90 |
|
| 91 | |
| 92 | * permit ptrace to access another process's address space through the icache
|
| 93 | * and the dcache
|
| 94 |
|
| 95 | #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
|
| 96 | do { \
|
| 97 | memcpy((dst), (src), (len)); \
|
| 98 | flush_icache_user_range((vma), (page), (vaddr), (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
|