From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- arch/mips/include/asm/edac.h | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 arch/mips/include/asm/edac.h (limited to 'arch/mips/include/asm/edac.h') diff --git a/arch/mips/include/asm/edac.h b/arch/mips/include/asm/edac.h new file mode 100644 index 000000000..94105d3f5 --- /dev/null +++ b/arch/mips/include/asm/edac.h @@ -0,0 +1,36 @@ +#ifndef ASM_EDAC_H +#define ASM_EDAC_H + +#include + +/* ECC atomic, DMA, SMP and interrupt safe scrub function */ + +static inline void atomic_scrub(void *va, u32 size) +{ + unsigned long *virt_addr = va; + unsigned long temp; + u32 i; + + for (i = 0; i < size / sizeof(unsigned long); i++) { + /* + * Very carefully read and write to memory atomically + * so we are interrupt, DMA and SMP safe. + * + * Intel: asm("lock; addl $0, %0"::"m"(*virt_addr)); + */ + + __asm__ __volatile__ ( + " .set mips2 \n" + "1: ll %0, %1 # atomic_scrub \n" + " addu %0, $0 \n" + " sc %0, %1 \n" + " beqz %0, 1b \n" + " .set mips0 \n" + : "=&r" (temp), "=" GCC_OFF_SMALL_ASM() (*virt_addr) + : GCC_OFF_SMALL_ASM() (*virt_addr)); + + virt_addr++; + } +} + +#endif -- cgit v1.2.3-54-g00ecf