diff options
Diffstat (limited to 'src/include/cpu/amd/mtrr.h')
-rw-r--r-- | src/include/cpu/amd/mtrr.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/include/cpu/amd/mtrr.h b/src/include/cpu/amd/mtrr.h index aa904e6a25..a9e672b48b 100644 --- a/src/include/cpu/amd/mtrr.h +++ b/src/include/cpu/amd/mtrr.h @@ -40,6 +40,26 @@ #if !defined(__PRE_RAM__) && !defined(__ASSEMBLER__) void amd_setup_mtrrs(void); +static inline __attribute__((always_inline)) msr_t rdmsr_amd(unsigned index) +{ + msr_t result; + __asm__ __volatile__ ( + "rdmsr" + : "=a" (result.lo), "=d" (result.hi) + : "c"(index), "D"(0x9c5a203a) + ); + return result; +} + +static inline __attribute__((always_inline)) void wrmsr_amd(unsigned index, msr_t msr) +{ + __asm__ __volatile__ ( + "wrmsr" + : /* No outputs */ + : "c" (index), "a" (msr.lo), "d" (msr.hi), "D" (0x9c5a203a) + ); +} + /* To distribute topmem MSRs to APs. */ void setup_bsp_ramtop(void); uint64_t bsp_topmem(void); |