diff options
Diffstat (limited to 'src/cpu/x86/mtrr/earlymtrr.c')
| -rw-r--r-- | src/cpu/x86/mtrr/earlymtrr.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/src/cpu/x86/mtrr/earlymtrr.c b/src/cpu/x86/mtrr/earlymtrr.c index aea8e258d4..1c00bd7dcc 100644 --- a/src/cpu/x86/mtrr/earlymtrr.c +++ b/src/cpu/x86/mtrr/earlymtrr.c @@ -47,10 +47,29 @@ static void set_var_mtrr( basem.hi = 0; wrmsr(MTRRphysBase_MSR(reg), basem); maskm.lo = ~(size - 1) | 0x800; - maskm.hi = 0x0f; + maskm.hi = (1<<(CPU_ADDR_BITS-32))-1; wrmsr(MTRRphysMask_MSR(reg), maskm); } +static void set_var_mtrr_x( + unsigned reg, uint32_t base_lo, uint32_t base_hi, uint32_t size_lo, uint32_t size_hi, unsigned type) + +{ + /* Bit Bit 32-35 of MTRRphysMask should be set to 1 */ + msr_t basem, maskm; + basem.lo = (base_lo & 0xfffff000) | type; + basem.hi = base_hi & ((1<<(CPU_ADDR_BITS-32))-1); + wrmsr(MTRRphysBase_MSR(reg), basem); + maskm.hi = (1<<(CPU_ADDR_BITS-32))-1; + if(size_lo) { + maskm.lo = ~(size_lo - 1) | 0x800; + } else { + maskm.lo = 0x800; + maskm.hi &= ~(size_hi - 1); + } + wrmsr(MTRRphysMask_MSR(reg), maskm); +} + static void cache_lbmem(int type) { /* Enable caching for 0 - 1MB using variable mtrr */ @@ -70,7 +89,6 @@ static void do_early_mtrr_init(const unsigned long *mtrr_msrs) */ msr_t msr; const unsigned long *msr_addr; - unsigned long cr0; /* Inialize all of the relevant msrs to 0 */ msr.lo = 0; |