git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| d01447b3 PM |
1 | #ifndef __ASM_SH_UNCACHED_H |
| 2 | #define __ASM_SH_UNCACHED_H | |
| 3 | ||
| 4 | #include <linux/bug.h> | |
| 5 | ||
| 6 | #ifdef CONFIG_UNCACHED_MAPPING | |
| edc9a958 PM |
7 | extern unsigned long cached_to_uncached; |
| 8 | extern unsigned long uncached_size; | |
| d01447b3 PM |
9 | extern unsigned long uncached_start, uncached_end; |
| 10 | ||
| 11 | extern int virt_addr_uncached(unsigned long kaddr); | |
| 12 | extern void uncached_init(void); | |
| 13 | extern void uncached_resize(unsigned long size); | |
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14 | |
| 15 | /* | |
| 16 | * Jump to uncached area. | |
| 17 | * When handling TLB or caches, we need to do it from an uncached area. | |
| 18 | */ | |
| 19 | #define jump_to_uncached() \ | |
| 20 | do { \ | |
| 21 | unsigned long __dummy; \ | |
| 22 | \ | |
| 23 | __asm__ __volatile__( \ | |
| 24 | "mova 1f, %0\n\t" \ | |
| 25 | "add %1, %0\n\t" \ | |
| 26 | "jmp @%0\n\t" \ | |
| 27 | " nop\n\t" \ | |
| 28 | ".balign 4\n" \ | |
| 29 | "1:" \ | |
| 30 | : "=&z" (__dummy) \ | |
| 31 | : "r" (cached_to_uncached)); \ | |
| 32 | } while (0) | |
| 33 | ||
| 34 | /* | |
| 35 | * Back to cached area. | |
| 36 | */ | |
| 37 | #define back_to_cached() \ | |
| 38 | do { \ | |
| 39 | unsigned long __dummy; \ | |
| 40 | ctrl_barrier(); \ | |
| 41 | __asm__ __volatile__( \ | |
| 42 | "mov.l 1f, %0\n\t" \ | |
| 43 | "jmp @%0\n\t" \ | |
| 44 | " nop\n\t" \ | |
| 45 | ".balign 4\n" \ | |
| 46 | "1: .long 2f\n" \ | |
| 47 | "2:" \ | |
| 48 | : "=&r" (__dummy)); \ | |
| 49 | } while (0) | |
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50 | #else |
| 51 | #define virt_addr_uncached(kaddr) (0) | |
| 52 | #define uncached_init() do { } while (0) | |
| 53 | #define uncached_resize(size) BUG() | |
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54 | #define jump_to_uncached() do { } while (0) |
| 55 | #define back_to_cached() do { } while (0) | |
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56 | #endif |
| 57 | ||
| 58 | #endif /* __ASM_SH_UNCACHED_H */ |