diff options
| author | Dan Lykowski <lykowdk@gmail.com> | 2009-01-12 16:16:08 +0000 |
|---|---|---|
| committer | Marc Jones <marc.jones@amd.com> | 2009-01-12 16:16:08 +0000 |
| commit | 6ef8e0f3e3a9044aa326a62e47b71670d9a218b7 (patch) | |
| tree | c839a5d4b359e33a5f28673a3aec5b0b4d183823 /src/mainboard/amd/pistachio/cache_as_ram_auto.c | |
| parent | 6fa7e6dae97853c948d1b5e5cffb35fa0f042dc5 (diff) | |
Check to see if K8 processor is capable of changing FIDVID otherwise it will throw a GP# when reading FIDVID_STATUS
Signed-off-by: Dan Lykowski <lykowdk@gmail.com>
Acked-by: Zheng Bao <zheng.bao@amd.com>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3856 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/mainboard/amd/pistachio/cache_as_ram_auto.c')
| -rw-r--r-- | src/mainboard/amd/pistachio/cache_as_ram_auto.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/src/mainboard/amd/pistachio/cache_as_ram_auto.c b/src/mainboard/amd/pistachio/cache_as_ram_auto.c index 52b5c0400a..c348a61f9d 100644 --- a/src/mainboard/amd/pistachio/cache_as_ram_auto.c +++ b/src/mainboard/amd/pistachio/cache_as_ram_auto.c @@ -155,6 +155,7 @@ 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); @@ -198,16 +199,26 @@ void real_main(unsigned long bist, unsigned long cpu_init_detectedx) post_code(0x04); - 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"); + } post_code(0x05); |