diff options
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/amd/mtrr/amd_mtrr.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/src/cpu/amd/mtrr/amd_mtrr.c b/src/cpu/amd/mtrr/amd_mtrr.c index 6c0ead25ba..106cb7949d 100644 --- a/src/cpu/amd/mtrr/amd_mtrr.c +++ b/src/cpu/amd/mtrr/amd_mtrr.c @@ -103,9 +103,12 @@ void amd_setup_mtrrs(void) const int cpu_id = cpuid_eax(0x80000001); printk(BIOS_SPEW, "CPU ID 0x80000001: %x\n", cpu_id); const int has_tom2wb = - (((cpu_id>>20 )&0xf) > 0) || // ExtendedFamily > 0 - ((((cpu_id>>8 )&0xf) == 0xf) && // Family == 0F - (((cpu_id>>16)&0xf) >= 0x4)); // Rev>=F deduced from rev tables + // ExtendedFamily > 0 + (((cpu_id>>20)&0xf) > 0) || + // Family == 0F + ((((cpu_id>>8)&0xf) == 0xf) && + // Rev>=F deduced from rev tables + (((cpu_id>>16)&0xf) >= 0x4)); if (has_tom2wb) printk(BIOS_DEBUG, "CPU is Fam 0Fh rev.F or later. We can use TOM2WB for any memory above 4GB\n"); @@ -135,9 +138,8 @@ void amd_setup_mtrrs(void) * undefined side effects. */ msr.lo = msr.hi = 0; - for (i = IORR_FIRST; i <= IORR_LAST; i++) { + for (i = IORR_FIRST; i <= IORR_LAST; i++) wrmsr(i, msr); - } /* Enable Variable Mtrrs * Enable the RdMem and WrMem bits in the fixed mtrrs. @@ -151,12 +153,12 @@ void amd_setup_mtrrs(void) enable_cache(); - address_bits = CONFIG_CPU_ADDR_BITS; //K8 could be 40, and GH could be 48 + //K8 could be 40, and GH could be 48 + address_bits = CONFIG_CPU_ADDR_BITS; /* AMD specific cpuid function to query number of address bits */ - if (cpuid_eax(0x80000000) >= 0x80000008) { + if (cpuid_eax(0x80000000) >= 0x80000008) address_bits = cpuid_eax(0x80000008) & 0xff; - } /* Now that I have mapped what is memory and what is not * Set up the mtrrs so we can cache the memory. |