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| author | Michal Marek <mmarek@suse.cz> | 2010-12-01 13:13:56 +0100 |
|---|---|---|
| committer | Michal Marek <mmarek@suse.cz> | 2010-12-01 13:13:56 +0100 |
| commit | 307991055b0ce65d53dc1eb501c456c10eb36360 (patch) | |
| tree | 71bb9263dc71344e5d7b97ca6d5cf223f1f1a856 /arch/sh/include/asm/uncached.h | |
| parent | 1198c6d45a1ef5f4f7fdfbf33ef7d270493ec575 (diff) | |
| parent | 9b4320b77bab4031649c484da1c595f39c2e43cd (diff) | |
Merge branch 'kconfig_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-next into kbuild/rc-fixes
Diffstat (limited to 'arch/sh/include/asm/uncached.h')
| -rw-r--r-- | arch/sh/include/asm/uncached.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/sh/include/asm/uncached.h b/arch/sh/include/asm/uncached.h index e3419f96626..6f8816b79cf 100644 --- a/arch/sh/include/asm/uncached.h +++ b/arch/sh/include/asm/uncached.h @@ -4,15 +4,55 @@ #include <linux/bug.h> #ifdef CONFIG_UNCACHED_MAPPING +extern unsigned long cached_to_uncached; +extern unsigned long uncached_size; extern unsigned long uncached_start, uncached_end; extern int virt_addr_uncached(unsigned long kaddr); extern void uncached_init(void); extern void uncached_resize(unsigned long size); + +/* + * Jump to uncached area. + * When handling TLB or caches, we need to do it from an uncached area. + */ +#define jump_to_uncached() \ +do { \ + unsigned long __dummy; \ + \ + __asm__ __volatile__( \ + "mova 1f, %0\n\t" \ + "add %1, %0\n\t" \ + "jmp @%0\n\t" \ + " nop\n\t" \ + ".balign 4\n" \ + "1:" \ + : "=&z" (__dummy) \ + : "r" (cached_to_uncached)); \ +} while (0) + +/* + * Back to cached area. + */ +#define back_to_cached() \ +do { \ + unsigned long __dummy; \ + ctrl_barrier(); \ + __asm__ __volatile__( \ + "mov.l 1f, %0\n\t" \ + "jmp @%0\n\t" \ + " nop\n\t" \ + ".balign 4\n" \ + "1: .long 2f\n" \ + "2:" \ + : "=&r" (__dummy)); \ +} while (0) #else #define virt_addr_uncached(kaddr) (0) #define uncached_init() do { } while (0) #define uncached_resize(size) BUG() +#define jump_to_uncached() do { } while (0) +#define back_to_cached() do { } while (0) #endif #endif /* __ASM_SH_UNCACHED_H */ |