Logo Search packages:      
Sourcecode: linux version File versions  Download package

edac.h

#ifndef ASM_EDAC_H
#define ASM_EDAC_H

/* 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), "=m" (*virt_addr)
            : "m" (*virt_addr));

            virt_addr++;
      }
}

#endif

Generated by  Doxygen 1.6.0   Back to index