diff options
Diffstat (limited to 'arch/xtensa/include/asm/cacheflush.h')
| -rw-r--r-- | arch/xtensa/include/asm/cacheflush.h | 136 |
1 files changed, 122 insertions, 14 deletions
diff --git a/arch/xtensa/include/asm/cacheflush.h b/arch/xtensa/include/asm/cacheflush.h index 8fc1c0c8de0..555a98a1845 100644 --- a/arch/xtensa/include/asm/cacheflush.h +++ b/arch/xtensa/include/asm/cacheflush.h @@ -1,18 +1,14 @@ /* - * include/asm-xtensa/cacheflush.h - * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * - * (C) 2001 - 2007 Tensilica Inc. + * (C) 2001 - 2013 Tensilica Inc. */ #ifndef _XTENSA_CACHEFLUSH_H #define _XTENSA_CACHEFLUSH_H -#ifdef __KERNEL__ - #include <linux/mm.h> #include <asm/processor.h> #include <asm/page.h> @@ -51,7 +47,6 @@ extern void __invalidate_icache_page(unsigned long); extern void __invalidate_icache_range(unsigned long, unsigned long); extern void __invalidate_dcache_range(unsigned long, unsigned long); - #if XCHAL_DCACHE_IS_WRITEBACK extern void __flush_invalidate_dcache_all(void); extern void __flush_dcache_page(unsigned long); @@ -87,9 +82,22 @@ static inline void __invalidate_icache_page_alias(unsigned long virt, * (see also Documentation/cachetlb.txt) */ -#if (DCACHE_WAY_SIZE > PAGE_SIZE) +#if (DCACHE_WAY_SIZE > PAGE_SIZE) || defined(CONFIG_SMP) + +#ifdef CONFIG_SMP +void flush_cache_all(void); +void flush_cache_range(struct vm_area_struct*, ulong, ulong); +void flush_icache_range(unsigned long start, unsigned long end); +void flush_cache_page(struct vm_area_struct*, + unsigned long, unsigned long); +#else +#define flush_cache_all local_flush_cache_all +#define flush_cache_range local_flush_cache_range +#define flush_icache_range local_flush_icache_range +#define flush_cache_page local_flush_cache_page +#endif -#define flush_cache_all() \ +#define local_flush_cache_all() \ do { \ __flush_invalidate_dcache_all(); \ __invalidate_icache_all(); \ @@ -101,9 +109,13 @@ static inline void __invalidate_icache_page_alias(unsigned long virt, #define flush_cache_vmap(start,end) flush_cache_all() #define flush_cache_vunmap(start,end) flush_cache_all() +#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 extern void flush_dcache_page(struct page*); -extern void flush_cache_range(struct vm_area_struct*, ulong, ulong); -extern void flush_cache_page(struct vm_area_struct*, unsigned long, unsigned long); + +void local_flush_cache_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end); +void local_flush_cache_page(struct vm_area_struct *vma, + unsigned long address, unsigned long pfn); #else @@ -114,15 +126,17 @@ extern void flush_cache_page(struct vm_area_struct*, unsigned long, unsigned lon #define flush_cache_vmap(start,end) do { } while (0) #define flush_cache_vunmap(start,end) do { } while (0) +#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 #define flush_dcache_page(page) do { } while (0) -#define flush_cache_page(vma,addr,pfn) do { } while (0) -#define flush_cache_range(vma,start,end) do { } while (0) +#define flush_icache_range local_flush_icache_range +#define flush_cache_page(vma, addr, pfn) do { } while (0) +#define flush_cache_range(vma, start, end) do { } while (0) #endif /* Ensure consistency between data and instruction cache. */ -#define flush_icache_range(start,end) \ +#define local_flush_icache_range(start, end) \ do { \ __flush_dcache_range(start, (end) - (start)); \ __invalidate_icache_range(start,(end) - (start)); \ @@ -155,5 +169,99 @@ extern void copy_from_user_page(struct vm_area_struct*, struct page*, #endif -#endif /* __KERNEL__ */ +#define XTENSA_CACHEBLK_LOG2 29 +#define XTENSA_CACHEBLK_SIZE (1 << XTENSA_CACHEBLK_LOG2) +#define XTENSA_CACHEBLK_MASK (7 << XTENSA_CACHEBLK_LOG2) + +#if XCHAL_HAVE_CACHEATTR +static inline u32 xtensa_get_cacheattr(void) +{ + u32 r; + asm volatile(" rsr %0, cacheattr" : "=a"(r)); + return r; +} + +static inline u32 xtensa_get_dtlb1(u32 addr) +{ + u32 r = addr & XTENSA_CACHEBLK_MASK; + return r | ((xtensa_get_cacheattr() >> (r >> (XTENSA_CACHEBLK_LOG2-2))) + & 0xF); +} +#else +static inline u32 xtensa_get_dtlb1(u32 addr) +{ + u32 r; + asm volatile(" rdtlb1 %0, %1" : "=a"(r) : "a"(addr)); + asm volatile(" dsync"); + return r; +} + +static inline u32 xtensa_get_cacheattr(void) +{ + u32 r = 0; + u32 a = 0; + do { + a -= XTENSA_CACHEBLK_SIZE; + r = (r << 4) | (xtensa_get_dtlb1(a) & 0xF); + } while (a); + return r; +} +#endif + +static inline int xtensa_need_flush_dma_source(u32 addr) +{ + return (xtensa_get_dtlb1(addr) & ((1 << XCHAL_CA_BITS) - 1)) >= 4; +} + +static inline int xtensa_need_invalidate_dma_destination(u32 addr) +{ + return (xtensa_get_dtlb1(addr) & ((1 << XCHAL_CA_BITS) - 1)) != 2; +} + +static inline void flush_dcache_unaligned(u32 addr, u32 size) +{ + u32 cnt; + if (size) { + cnt = (size + ((XCHAL_DCACHE_LINESIZE - 1) & addr) + + XCHAL_DCACHE_LINESIZE - 1) / XCHAL_DCACHE_LINESIZE; + while (cnt--) { + asm volatile(" dhwb %0, 0" : : "a"(addr)); + addr += XCHAL_DCACHE_LINESIZE; + } + asm volatile(" dsync"); + } +} + +static inline void invalidate_dcache_unaligned(u32 addr, u32 size) +{ + int cnt; + if (size) { + asm volatile(" dhwbi %0, 0 ;" : : "a"(addr)); + cnt = (size + ((XCHAL_DCACHE_LINESIZE - 1) & addr) + - XCHAL_DCACHE_LINESIZE - 1) / XCHAL_DCACHE_LINESIZE; + while (cnt-- > 0) { + asm volatile(" dhi %0, %1" : : "a"(addr), + "n"(XCHAL_DCACHE_LINESIZE)); + addr += XCHAL_DCACHE_LINESIZE; + } + asm volatile(" dhwbi %0, %1" : : "a"(addr), + "n"(XCHAL_DCACHE_LINESIZE)); + asm volatile(" dsync"); + } +} + +static inline void flush_invalidate_dcache_unaligned(u32 addr, u32 size) +{ + u32 cnt; + if (size) { + cnt = (size + ((XCHAL_DCACHE_LINESIZE - 1) & addr) + + XCHAL_DCACHE_LINESIZE - 1) / XCHAL_DCACHE_LINESIZE; + while (cnt--) { + asm volatile(" dhwbi %0, 0" : : "a"(addr)); + addr += XCHAL_DCACHE_LINESIZE; + } + asm volatile(" dsync"); + } +} + #endif /* _XTENSA_CACHEFLUSH_H */ |