diff options
Diffstat (limited to 'src/mainboard/amd/serengeti_cheetah/cache_as_ram_auto.c')
| -rw-r--r-- | src/mainboard/amd/serengeti_cheetah/cache_as_ram_auto.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/mainboard/amd/serengeti_cheetah/cache_as_ram_auto.c b/src/mainboard/amd/serengeti_cheetah/cache_as_ram_auto.c index 5b217a6711..7e60c2c7a1 100644 --- a/src/mainboard/amd/serengeti_cheetah/cache_as_ram_auto.c +++ b/src/mainboard/amd/serengeti_cheetah/cache_as_ram_auto.c @@ -259,6 +259,7 @@ void real_main(unsigned long bist, unsigned long cpu_init_detectedx) int needs_reset; int i; unsigned bsp_apicid = 0; + struct cpuid_result cpuid1; if (bist == 0) { bsp_apicid = init_cpus(cpu_init_detectedx, sysinfo); @@ -311,8 +312,13 @@ void real_main(unsigned long bist, unsigned long cpu_init_detectedx) #endif #if K8_SET_FIDVID == 1 + /* Check to see if processor is capable of changing FIDVID */ + /* otherwise it will throw a GP# when reading FIDVID_STATUS */ + cpuid1 = cpuid(0x80000007); + if( (cpuid1.edx & 0x6) == 0x6 ) { { + /* Read FIDVID_STATUS */ msr_t msr; msr=rdmsr(0xc0010042); print_debug("begin msr fid, vid "); print_debug_hex32( msr.hi ); print_debug_hex32(msr.lo); print_debug("\r\n"); @@ -332,6 +338,11 @@ void real_main(unsigned long bist, unsigned long cpu_init_detectedx) print_debug("end msr fid, vid "); print_debug_hex32( msr.hi ); print_debug_hex32(msr.lo); print_debug("\r\n"); } + + } else { + print_debug("Changing FIDVID not supported\n"); + } + #endif #if 1 |