arch/ppc-all/include/asm/cpu.h

   1 #ifndef ASM_PPC_CPU_H
   2 #define ASM_PPC_CPU_H
   3
   4 #include <inttypes.h>
   5
   6 static inline uint32_t rdmsr()
   7 {
   8     uint32_t msr; asm volatile("mfmsr %0":"=r"(msr)); return msr;
   9 }
  10
  11 static inline void wrmsr(uint32_t msr)
  12 {
  13     asm volatile("mtmsr %0"::"r"(msr));
  14 }
  15
  16 #define rdspr(reg) \
  17     ({ unsigned long val; asm volatile("mfspr %0,%1":"=r"(val):"i"(reg)); val; })
  18
  19 #define wrspr(reg, val) \
  20     do { asm volatile("mtspr %0,%1"::"i"(reg),"r"(val)); } while(0)
  21
  22 #endif