| 1 |
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| 2 | #ifndef __ASM_SH_UNCACHED_H
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| 3 | #define __ASM_SH_UNCACHED_H
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| 4 |
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| 5 | #include <linux/bug.h>
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| 6 |
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| 7 | #ifdef CONFIG_UNCACHED_MAPPING
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| 8 | extern unsigned long cached_to_uncached;
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| 9 | extern unsigned long uncached_size;
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| 10 | extern unsigned long uncached_start, uncached_end;
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| 11 |
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| 12 | extern int virt_addr_uncached(unsigned long kaddr);
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| 13 | extern void uncached_init(void);
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| 14 | extern void uncached_resize(unsigned long size);
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| 15 |
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| 16 | |
| 17 | * Jump to uncached area.
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| 18 | * When handling TLB or caches, we need to do it from an uncached area.
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| 19 |
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| 20 | #define jump_to_uncached() \
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| 21 | do { \
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| 22 | unsigned long __dummy; \
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| 23 | \
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| 24 | __asm__ __volatile__( \
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| 25 | "mova 1f, %0\n\t" \
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| 26 | "add %1, %0\n\t" \
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| 27 | "jmp @%0\n\t" \
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| 28 | " nop\n\t" \
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| 29 | ".balign 4\n" \
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| 30 | "1:" \
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| 31 | : "=&z" (__dummy) \
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| 32 | : "r" (cached_to_uncached)); \
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| 33 | } while (0)
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| 34 |
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| 35 | |
| 36 | * Back to cached area.
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| 37 |
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| 38 | #define back_to_cached() \
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| 39 | do { \
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| 40 | unsigned long __dummy; \
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| 41 | ctrl_barrier(); \
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| 42 | __asm__ __volatile__( \
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| 43 | "mov.l 1f, %0\n\t" \
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| 44 | "jmp @%0\n\t" \
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| 45 | " nop\n\t" \
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| 46 | ".balign 4\n" \
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| 47 | "1: .long 2f\n" \
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| 48 | "2:" \
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| 49 | : "=&r" (__dummy)); \
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| 50 | } while (0)
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| 51 | #else
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| 52 | #define virt_addr_uncached(kaddr) (0)
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| 53 | #define uncached_init() do { } while (0)
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| 54 | #define uncached_resize(size) BUG()
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| 55 | #define jump_to_uncached() do { } while (0)
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| 56 | #define back_to_cached() do { } while (0)
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| 57 | #endif
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| 58 |
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| 59 | #endif
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