diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-08-08 11:38:42 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-08-08 11:38:42 -0700 |
commit | 49b75b87ce2dfbd99e59a50c3681b154d07e3a22 (patch) | |
tree | f14e1da19a13d87a512f9043c2f37fd75dd122b3 /arch/avr32/include/asm/cacheflush.h | |
parent | f1c7f79b6ab4f7ada002a0fae47f462ede6b6857 (diff) | |
parent | 097d9eb537ff4d88b74c3fe67392e27c478ca3c5 (diff) |
Merge branch 'for-linus-merged' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus-merged' of master.kernel.org:/home/rmk/linux-2.6-arm:
[ARM] 5177/1: arm/mach-sa1100/Makefile: remove CONFIG_SA1100_USB
[ARM] 5166/1: magician: add MAINTAINERS entry
[ARM] fix pnx4008 build errors
[ARM] Fix SMP booting with non-zero PHYS_OFFSET
[ARM] 5185/1: Fix spi num_chipselect for lubbock
[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach
[ARM] Add support for arch/arm/mach-*/include and arch/arm/plat-*/include
[ARM] Remove asm/hardware.h, use asm/arch/hardware.h instead
[ARM] Eliminate useless includes of asm/mach-types.h
[ARM] Fix circular include dependency with IRQ headers
avr32: Use <mach/foo.h> instead of <asm/arch/foo.h>
avr32: Introduce arch/avr32/mach-*/include/mach
avr32: Move include/asm-avr32 to arch/avr32/include/asm
[ARM] sa1100_wdt: use reset_status to remember watchdog reset status
[ARM] pxa: introduce reset_status and clear_reset_status for driver's usage
[ARM] pxa: introduce reset.h for reset specific header information
Diffstat (limited to 'arch/avr32/include/asm/cacheflush.h')
-rw-r--r-- | arch/avr32/include/asm/cacheflush.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/arch/avr32/include/asm/cacheflush.h b/arch/avr32/include/asm/cacheflush.h new file mode 100644 index 00000000000..670674749b2 --- /dev/null +++ b/arch/avr32/include/asm/cacheflush.h @@ -0,0 +1,131 @@ +/* + * Copyright (C) 2004-2006 Atmel Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __ASM_AVR32_CACHEFLUSH_H +#define __ASM_AVR32_CACHEFLUSH_H + +/* Keep includes the same across arches. */ +#include <linux/mm.h> + +#define CACHE_OP_ICACHE_INVALIDATE 0x01 +#define CACHE_OP_DCACHE_INVALIDATE 0x0b +#define CACHE_OP_DCACHE_CLEAN 0x0c +#define CACHE_OP_DCACHE_CLEAN_INVAL 0x0d + +/* + * Invalidate any cacheline containing virtual address vaddr without + * writing anything back to memory. + * + * Note that this function may corrupt unrelated data structures when + * applied on buffers that are not cacheline aligned in both ends. + */ +static inline void invalidate_dcache_line(void *vaddr) +{ + asm volatile("cache %0[0], %1" + : + : "r"(vaddr), "n"(CACHE_OP_DCACHE_INVALIDATE) + : "memory"); +} + +/* + * Make sure any cacheline containing virtual address vaddr is written + * to memory. + */ +static inline void clean_dcache_line(void *vaddr) +{ + asm volatile("cache %0[0], %1" + : + : "r"(vaddr), "n"(CACHE_OP_DCACHE_CLEAN) + : "memory"); +} + +/* + * Make sure any cacheline containing virtual address vaddr is written + * to memory and then invalidate it. + */ +static inline void flush_dcache_line(void *vaddr) +{ + asm volatile("cache %0[0], %1" + : + : "r"(vaddr), "n"(CACHE_OP_DCACHE_CLEAN_INVAL) + : "memory"); +} + +/* + * Invalidate any instruction cacheline containing virtual address + * vaddr. + */ +static inline void invalidate_icache_line(void *vaddr) +{ + asm volatile("cache %0[0], %1" + : + : "r"(vaddr), "n"(CACHE_OP_ICACHE_INVALIDATE) + : "memory"); +} + +/* + * Applies the above functions on all lines that are touched by the + * specified virtual address range. + */ +void invalidate_dcache_region(void *start, size_t len); +void clean_dcache_region(void *start, size_t len); +void flush_dcache_region(void *start, size_t len); +void invalidate_icache_region(void *start, size_t len); + +/* + * Make sure any pending writes are completed before continuing. + */ +#define flush_write_buffer() asm volatile("sync 0" : : : "memory") + +/* + * The following functions are called when a virtual mapping changes. + * We do not need to flush anything in this case. + */ +#define flush_cache_all() do { } while (0) +#define flush_cache_mm(mm) do { } while (0) +#define flush_cache_dup_mm(mm) do { } while (0) +#define flush_cache_range(vma, start, end) do { } while (0) +#define flush_cache_page(vma, vmaddr, pfn) do { } while (0) +#define flush_cache_vmap(start, end) do { } while (0) +#define flush_cache_vunmap(start, end) do { } while (0) + +/* + * I think we need to implement this one to be able to reliably + * execute pages from RAMDISK. However, if we implement the + * flush_dcache_*() functions, it might not be needed anymore. + * + * #define flush_icache_page(vma, page) do { } while (0) + */ +extern void flush_icache_page(struct vm_area_struct *vma, struct page *page); + +/* + * These are (I think) related to D-cache aliasing. We might need to + * do something here, but only for certain configurations. No such + * configurations exist at this time. + */ +#define flush_dcache_page(page) do { } while (0) +#define flush_dcache_mmap_lock(page) do { } while (0) +#define flush_dcache_mmap_unlock(page) do { } while (0) + +/* + * These are for I/D cache coherency. In this case, we do need to + * flush with all configurations. + */ +extern void flush_icache_range(unsigned long start, unsigned long end); + +extern void copy_to_user_page(struct vm_area_struct *vma, struct page *page, + unsigned long vaddr, void *dst, const void *src, + unsigned long len); + +static inline void copy_from_user_page(struct vm_area_struct *vma, + struct page *page, unsigned long vaddr, void *dst, + const void *src, unsigned long len) +{ + memcpy(dst, src, len); +} + +#endif /* __ASM_AVR32_CACHEFLUSH_H */ |