diff options
Diffstat (limited to 'src/cpu/amd/mtrr')
| -rw-r--r-- | src/cpu/amd/mtrr/amd_mtrr.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/src/cpu/amd/mtrr/amd_mtrr.c b/src/cpu/amd/mtrr/amd_mtrr.c index de4ed988c2..e57bb3bec7 100644 --- a/src/cpu/amd/mtrr/amd_mtrr.c +++ b/src/cpu/amd/mtrr/amd_mtrr.c @@ -96,26 +96,32 @@ static void set_fixed_mtrr_resource(void *gp, struct device *dev, struct resourc return; } printk_debug("Setting fixed MTRRs(%d-%d) Type: WB, RdMEM, WrMEM\n", - start_mtrr, last_mtrr); + start_mtrr, last_mtrr); set_fixed_mtrrs(start_mtrr, last_mtrr, MTRR_TYPE_WRBACK | MTRR_READ_MEM | MTRR_WRITE_MEM); } +extern void enable_fixed_mtrr(void); + void amd_setup_mtrrs(void) { + unsigned long address_bits; struct mem_state state; unsigned long i; msr_t msr; + /* Enable the access to AMD RdDram and WrDram extension bits */ + disable_cache(); msr = rdmsr(SYSCFG_MSR); msr.lo |= SYSCFG_MSR_MtrrFixDramModEn; wrmsr(SYSCFG_MSR, msr); + enable_cache(); printk_debug("\n"); /* Initialized the fixed_mtrrs to uncached */ printk_debug("Setting fixed MTRRs(%d-%d) type: UC\n", - 0, NUM_FIXED_RANGES); + 0, NUM_FIXED_RANGES); set_fixed_mtrrs(0, NUM_FIXED_RANGES, MTRR_TYPE_UNCACHEABLE); /* Except for the PCI MMIO hole just before 4GB there are no @@ -127,6 +133,7 @@ void amd_setup_mtrrs(void) IORESOURCE_MEM | IORESOURCE_CACHEABLE, IORESOURCE_MEM | IORESOURCE_CACHEABLE, set_fixed_mtrr_resource, &state); printk_debug("DONE fixed MTRRs\n"); + if (state.mmio_basek > state.tomk) { state.mmio_basek = state.tomk; } @@ -164,10 +171,17 @@ void amd_setup_mtrrs(void) msr.lo &= ~SYSCFG_MSR_MtrrFixDramModEn; wrmsr(SYSCFG_MSR, msr); + enable_fixed_mtrr(); + enable_cache(); + /* FIXME we should probably query the cpu for this + * but so far this is all any recent AMD cpu has supported. + */ + address_bits = 40; + /* Now that I have mapped what is memory and what is not * Setup the mtrrs so we can cache the memory. */ - x86_setup_mtrrs(); + x86_setup_var_mtrrs(address_bits); } |