| 1 |
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| 2 | #ifndef ASM_EDAC_H
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| 3 | #define ASM_EDAC_H
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| 4 |
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| 5 | #include <asm/compiler.h>
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| 6 |
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| 7 |
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| 8 |
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| 9 | static inline void edac_atomic_scrub(void *va, u32 size)
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| 10 | {
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| 11 | unsigned long *virt_addr = va;
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| 12 | unsigned long temp;
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| 13 | u32 i;
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| 14 |
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| 15 | for (i = 0; i < size / sizeof(unsigned long); i++) {
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| 16 | |
| 17 | * Very carefully read and write to memory atomically
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| 18 | * so we are interrupt, DMA and SMP safe.
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| 19 | *
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| 20 | * Intel: asm("lock; addl $0, %0"::"m"(*virt_addr));
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| 21 |
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| 22 |
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| 23 | __asm__ __volatile__ (
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| 24 | " .set push \n"
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| 25 | " .set mips2 \n"
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| 26 | "1: ll %0, %1 # edac_atomic_scrub \n"
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| 27 | " addu %0, $0 \n"
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| 28 | " sc %0, %1 \n"
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| 29 | " beqz %0, 1b \n"
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| 30 | " .set pop \n"
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| 31 | : "=&r" (temp), "=" GCC_OFF_SMALL_ASM() (*virt_addr)
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| 32 | : GCC_OFF_SMALL_ASM() (*virt_addr));
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| 33 |
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| 34 | virt_addr++;
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| 35 | }
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| 36 | }
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| 37 |
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| 38 | #endif
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