msr_t msr, sys_cfg;
// Test if this CPU is a Fam 0Fh rev. F or later
const int cpu_id = cpuid_eax(0x80000001);
+ printk(BIOS_SPEW, "CPU ID 0x80000001: %x\n", cpu_id);
const int has_tom2wb =
- (((cpu_id>>8 )&0xf) > 0xf) || // Family > 0F
+ (((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
if(has_tom2wb)
- printk(BIOS_DEBUG, "CPU is Fam 0Fh rev.F or later, using TOM2WB instead of MTRR above 4GB\n");
+ printk(BIOS_DEBUG, "CPU is Fam 0Fh rev.F or later. We can use TOM2WB for any memory above 4GB\n");
/* Enable the access to AMD RdDram and WrDram extension bits */
disable_cache();