2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * (C) 2001 - 2013 Tensilica Inc.
9 #ifndef _XTENSA_CACHEFLUSH_H
10 #define _XTENSA_CACHEFLUSH_H
13 #include <asm/processor.h>
17 * Lo-level routines for cache flushing.
19 * invalidate data or instruction cache:
21 * __invalidate_icache_all()
22 * __invalidate_icache_page(adr)
23 * __invalidate_dcache_page(adr)
24 * __invalidate_icache_range(from,size)
25 * __invalidate_dcache_range(from,size)
29 * __flush_dcache_page(adr)
31 * flush and invalidate data cache:
33 * __flush_invalidate_dcache_all()
34 * __flush_invalidate_dcache_page(adr)
35 * __flush_invalidate_dcache_range(from,size)
37 * specials for cache aliasing:
39 * __flush_invalidate_dcache_page_alias(vaddr,paddr)
40 * __invalidate_dcache_page_alias(vaddr,paddr)
41 * __invalidate_icache_page_alias(vaddr,paddr)
44 extern void __invalidate_dcache_all(void);
45 extern void __invalidate_icache_all(void);
46 extern void __invalidate_dcache_page(unsigned long);
47 extern void __invalidate_icache_page(unsigned long);
48 extern void __invalidate_icache_range(unsigned long, unsigned long);
49 extern void __invalidate_dcache_range(unsigned long, unsigned long);
51 #if XCHAL_DCACHE_IS_WRITEBACK
52 extern void __flush_invalidate_dcache_all(void);
53 extern void __flush_dcache_page(unsigned long);
54 extern void __flush_dcache_range(unsigned long, unsigned long);
55 extern void __flush_invalidate_dcache_page(unsigned long);
56 extern void __flush_invalidate_dcache_range(unsigned long, unsigned long);
58 # define __flush_dcache_range(p,s) do { } while(0)
59 # define __flush_dcache_page(p) do { } while(0)
60 # define __flush_invalidate_dcache_page(p) __invalidate_dcache_page(p)
61 # define __flush_invalidate_dcache_range(p,s) __invalidate_dcache_range(p,s)
64 #if defined(CONFIG_MMU) && (DCACHE_WAY_SIZE > PAGE_SIZE)
65 extern void __flush_invalidate_dcache_page_alias(unsigned long, unsigned long);
66 extern void __invalidate_dcache_page_alias(unsigned long, unsigned long);
68 static inline void __flush_invalidate_dcache_page_alias(unsigned long virt,
69 unsigned long phys) { }
71 #if defined(CONFIG_MMU) && (ICACHE_WAY_SIZE > PAGE_SIZE)
72 extern void __invalidate_icache_page_alias(unsigned long, unsigned long);
74 static inline void __invalidate_icache_page_alias(unsigned long virt,
75 unsigned long phys) { }
79 * We have physically tagged caches - nothing to do here -
80 * unless we have cache aliasing.
82 * Pages can get remapped. Because this might change the 'color' of that page,
83 * we have to flush the cache before the PTE is changed.
84 * (see also Documentation/cachetlb.txt)
87 #if (DCACHE_WAY_SIZE > PAGE_SIZE) || defined(CONFIG_SMP)
90 void flush_cache_all(void);
91 void flush_cache_range(struct vm_area_struct*, ulong, ulong);
92 void flush_icache_range(unsigned long start, unsigned long end);
93 void flush_cache_page(struct vm_area_struct*,
94 unsigned long, unsigned long);
96 #define flush_cache_all local_flush_cache_all
97 #define flush_cache_range local_flush_cache_range
98 #define flush_icache_range local_flush_icache_range
99 #define flush_cache_page local_flush_cache_page
102 #define local_flush_cache_all() \
104 __flush_invalidate_dcache_all(); \
105 __invalidate_icache_all(); \
108 #define flush_cache_mm(mm) flush_cache_all()
109 #define flush_cache_dup_mm(mm) flush_cache_mm(mm)
111 #define flush_cache_vmap(start,end) flush_cache_all()
112 #define flush_cache_vunmap(start,end) flush_cache_all()
114 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
115 extern void flush_dcache_page(struct page*);
117 void local_flush_cache_range(struct vm_area_struct *vma,
118 unsigned long start, unsigned long end);
119 void local_flush_cache_page(struct vm_area_struct *vma,
120 unsigned long address, unsigned long pfn);
124 #define flush_cache_all() do { } while (0)
125 #define flush_cache_mm(mm) do { } while (0)
126 #define flush_cache_dup_mm(mm) do { } while (0)
128 #define flush_cache_vmap(start,end) do { } while (0)
129 #define flush_cache_vunmap(start,end) do { } while (0)
131 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
132 #define flush_dcache_page(page) do { } while (0)
134 #define flush_icache_range local_flush_icache_range
135 #define flush_cache_page(vma, addr, pfn) do { } while (0)
136 #define flush_cache_range(vma, start, end) do { } while (0)
140 /* Ensure consistency between data and instruction cache. */
141 #define local_flush_icache_range(start, end) \
143 __flush_dcache_range(start, (end) - (start)); \
144 __invalidate_icache_range(start,(end) - (start)); \
147 /* This is not required, see Documentation/cachetlb.txt */
148 #define flush_icache_page(vma,page) do { } while (0)
150 #define flush_dcache_mmap_lock(mapping) do { } while (0)
151 #define flush_dcache_mmap_unlock(mapping) do { } while (0)
153 #if (DCACHE_WAY_SIZE > PAGE_SIZE)
155 extern void copy_to_user_page(struct vm_area_struct*, struct page*,
156 unsigned long, void*, const void*, unsigned long);
157 extern void copy_from_user_page(struct vm_area_struct*, struct page*,
158 unsigned long, void*, const void*, unsigned long);
162 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
164 memcpy(dst, src, len); \
165 __flush_dcache_range((unsigned long) dst, len); \
166 __invalidate_icache_range((unsigned long) dst, len); \
169 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
170 memcpy(dst, src, len)
174 #define XTENSA_CACHEBLK_LOG2 29
175 #define XTENSA_CACHEBLK_SIZE (1 << XTENSA_CACHEBLK_LOG2)
176 #define XTENSA_CACHEBLK_MASK (7 << XTENSA_CACHEBLK_LOG2)
178 #if XCHAL_HAVE_CACHEATTR
179 static inline u32 xtensa_get_cacheattr(void)
182 asm volatile(" rsr %0, cacheattr" : "=a"(r));
186 static inline u32 xtensa_get_dtlb1(u32 addr)
188 u32 r = addr & XTENSA_CACHEBLK_MASK;
189 return r | ((xtensa_get_cacheattr() >> (r >> (XTENSA_CACHEBLK_LOG2-2)))
193 static inline u32 xtensa_get_dtlb1(u32 addr)
196 asm volatile(" rdtlb1 %0, %1" : "=a"(r) : "a"(addr));
197 asm volatile(" dsync");
201 static inline u32 xtensa_get_cacheattr(void)
206 a -= XTENSA_CACHEBLK_SIZE;
207 r = (r << 4) | (xtensa_get_dtlb1(a) & 0xF);
213 static inline int xtensa_need_flush_dma_source(u32 addr)
215 return (xtensa_get_dtlb1(addr) & ((1 << XCHAL_CA_BITS) - 1)) >= 4;
218 static inline int xtensa_need_invalidate_dma_destination(u32 addr)
220 return (xtensa_get_dtlb1(addr) & ((1 << XCHAL_CA_BITS) - 1)) != 2;
223 static inline void flush_dcache_unaligned(u32 addr, u32 size)
227 cnt = (size + ((XCHAL_DCACHE_LINESIZE - 1) & addr)
228 + XCHAL_DCACHE_LINESIZE - 1) / XCHAL_DCACHE_LINESIZE;
230 asm volatile(" dhwb %0, 0" : : "a"(addr));
231 addr += XCHAL_DCACHE_LINESIZE;
233 asm volatile(" dsync");
237 static inline void invalidate_dcache_unaligned(u32 addr, u32 size)
241 asm volatile(" dhwbi %0, 0 ;" : : "a"(addr));
242 cnt = (size + ((XCHAL_DCACHE_LINESIZE - 1) & addr)
243 - XCHAL_DCACHE_LINESIZE - 1) / XCHAL_DCACHE_LINESIZE;
245 asm volatile(" dhi %0, %1" : : "a"(addr),
246 "n"(XCHAL_DCACHE_LINESIZE));
247 addr += XCHAL_DCACHE_LINESIZE;
249 asm volatile(" dhwbi %0, %1" : : "a"(addr),
250 "n"(XCHAL_DCACHE_LINESIZE));
251 asm volatile(" dsync");
255 static inline void flush_invalidate_dcache_unaligned(u32 addr, u32 size)
259 cnt = (size + ((XCHAL_DCACHE_LINESIZE - 1) & addr)
260 + XCHAL_DCACHE_LINESIZE - 1) / XCHAL_DCACHE_LINESIZE;
262 asm volatile(" dhwbi %0, 0" : : "a"(addr));
263 addr += XCHAL_DCACHE_LINESIZE;
265 asm volatile(" dsync");
269 #endif /* _XTENSA_CACHEFLUSH_H */