diff options
Diffstat (limited to 'src/mainboard/amd/dbm690t')
| -rw-r--r-- | src/mainboard/amd/dbm690t/cache_as_ram_auto.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/src/mainboard/amd/dbm690t/cache_as_ram_auto.c b/src/mainboard/amd/dbm690t/cache_as_ram_auto.c index 6c8d9e3542..76ce93bf07 100644 --- a/src/mainboard/amd/dbm690t/cache_as_ram_auto.c +++ b/src/mainboard/amd/dbm690t/cache_as_ram_auto.c @@ -161,6 +161,7 @@ void real_main(unsigned long bist, unsigned long cpu_init_detectedx) int needs_reset = 0; u32 bsp_apicid = 0; msr_t msr; + struct cpuid_result cpuid1; struct sys_info *sysinfo = (struct sys_info *)(DCACHE_RAM_BASE + DCACHE_RAM_SIZE - DCACHE_RAM_GLOBAL_VAR_SIZE); @@ -197,16 +198,26 @@ void real_main(unsigned long bist, unsigned long cpu_init_detectedx) rs690_early_setup(); sb600_early_setup(); - msr=rdmsr(0xc0010042); - printk_debug("begin msr fid, vid: hi=0x%x, lo=0x%x\n", msr.hi, msr.lo); + /* 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 ) { - enable_fid_change(); - enable_fid_change_on_sb(sysinfo->sbbusn, sysinfo->sbdn); - init_fidvid_bsp(bsp_apicid); + /* Read FIDVID_STATUS */ + msr=rdmsr(0xc0010042); + printk_debug("begin msr fid, vid: hi=0x%x, lo=0x%x\n", msr.hi, msr.lo); - /* show final fid and vid */ - msr=rdmsr(0xc0010042); - printk_debug("end msr fid, vid: hi=0x%x, lo=0x%x\n", msr.hi, msr.lo); + enable_fid_change(); + enable_fid_change_on_sb(sysinfo->sbbusn, sysinfo->sbdn); + init_fidvid_bsp(bsp_apicid); + + /* show final fid and vid */ + msr=rdmsr(0xc0010042); + printk_debug("end msr fid, vid: hi=0x%x, lo=0x%x\n", msr.hi, msr.lo); + + } else { + printk_debug("Changing FIDVID not supported\n"); + } needs_reset = optimize_link_coherent_ht(); needs_reset |= optimize_link_incoherent_ht(sysinfo); |