diff options
Diffstat (limited to 'arch/blackfin/include/asm/cacheflush.h')
| -rw-r--r-- | arch/blackfin/include/asm/cacheflush.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/cacheflush.h b/arch/blackfin/include/asm/cacheflush.h new file mode 100644 index 000000000..9a5b2c572 --- /dev/null +++ b/arch/blackfin/include/asm/cacheflush.h @@ -0,0 +1,118 @@ +/* + * Blackfin low-level cache routines + * + * Copyright 2004-2009 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#ifndef _BLACKFIN_CACHEFLUSH_H +#define _BLACKFIN_CACHEFLUSH_H + +#include <asm/blackfin.h> /* for SSYNC() */ +#include <asm/sections.h> /* for _ramend */ +#ifdef CONFIG_SMP +#include <asm/smp.h> +#endif + +extern void blackfin_icache_flush_range(unsigned long start_address, unsigned long end_address); +extern void blackfin_dcache_flush_range(unsigned long start_address, unsigned long end_address); +extern void blackfin_dcache_invalidate_range(unsigned long start_address, unsigned long end_address); +extern void blackfin_dflush_page(void *page); +extern void blackfin_invalidate_entire_dcache(void); +extern void blackfin_invalidate_entire_icache(void); + +#define flush_dcache_mmap_lock(mapping) do { } while (0) +#define flush_dcache_mmap_unlock(mapping) do { } while (0) +#define flush_cache_mm(mm) do { } while (0) +#define flush_cache_range(vma, start, end) do { } while (0) +#define flush_cache_page(vma, vmaddr) do { } while (0) +#define flush_cache_vmap(start, end) do { } while (0) +#define flush_cache_vunmap(start, end) do { } while (0) + +#ifdef CONFIG_SMP +#define flush_icache_range_others(start, end) \ + smp_icache_flush_range_others((start), (end)) +#else +#define flush_icache_range_others(start, end) do { } while (0) +#endif + +static inline void flush_icache_range(unsigned start, unsigned end) +{ +#if defined(CONFIG_BFIN_EXTMEM_WRITEBACK) + if (end <= physical_mem_end) + blackfin_dcache_flush_range(start, end); +#endif +#if defined(CONFIG_BFIN_L2_WRITEBACK) + if (start >= L2_START && end <= L2_START + L2_LENGTH) + blackfin_dcache_flush_range(start, end); +#endif + + /* Make sure all write buffers in the data side of the core + * are flushed before trying to invalidate the icache. This + * needs to be after the data flush and before the icache + * flush so that the SSYNC does the right thing in preventing + * the instruction prefetcher from hitting things in cached + * memory at the wrong time -- it runs much further ahead than + * the pipeline. + */ + SSYNC(); +#if defined(CONFIG_BFIN_EXTMEM_ICACHEABLE) + if (end <= physical_mem_end) { + blackfin_icache_flush_range(start, end); + flush_icache_range_others(start, end); + } +#endif +#if defined(CONFIG_BFIN_L2_ICACHEABLE) + if (start >= L2_START && end <= L2_START + L2_LENGTH) { + blackfin_icache_flush_range(start, end); + flush_icache_range_others(start, end); + } +#endif +} + +#define copy_to_user_page(vma, page, vaddr, dst, src, len) \ +do { memcpy(dst, src, len); \ + flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \ +} while (0) + +#define copy_from_user_page(vma, page, vaddr, dst, src, len) memcpy(dst, src, len) + +#if defined(CONFIG_BFIN_DCACHE) +# define invalidate_dcache_range(start,end) blackfin_dcache_invalidate_range((start), (end)) +#else +# define invalidate_dcache_range(start,end) do { } while (0) +#endif +#if defined(CONFIG_BFIN_EXTMEM_WRITEBACK) || defined(CONFIG_BFIN_L2_WRITEBACK) +# define flush_dcache_range(start,end) blackfin_dcache_flush_range((start), (end)) +#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 +# define flush_dcache_page(page) blackfin_dflush_page(page_address(page)) +#else +# define flush_dcache_range(start,end) do { } while (0) +#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 +# define flush_dcache_page(page) do { } while (0) +#endif + +extern unsigned long reserved_mem_dcache_on; +extern unsigned long reserved_mem_icache_on; + +static inline int bfin_addr_dcacheable(unsigned long addr) +{ +#ifdef CONFIG_BFIN_EXTMEM_DCACHEABLE + if (addr < (_ramend - DMA_UNCACHED_REGION)) + return 1; +#endif + + if (reserved_mem_dcache_on && + addr >= _ramend && addr < physical_mem_end) + return 1; + +#ifdef CONFIG_BFIN_L2_DCACHEABLE + if (addr >= L2_START && addr < L2_START + L2_LENGTH) + return 1; +#endif + + return 0; +} + +#endif /* _BLACKFIN_ICACHEFLUSH_H */ |