diff options
Diffstat (limited to 'src/cpu/x86/mtrr/earlymtrr.c')
| -rw-r--r-- | src/cpu/x86/mtrr/earlymtrr.c | 46 |
1 files changed, 6 insertions, 40 deletions
diff --git a/src/cpu/x86/mtrr/earlymtrr.c b/src/cpu/x86/mtrr/earlymtrr.c index 5c83554cb2..dcfcccd0f3 100644 --- a/src/cpu/x86/mtrr/earlymtrr.c +++ b/src/cpu/x86/mtrr/earlymtrr.c @@ -5,19 +5,6 @@ #include <cpu/amd/mtrr.h> #include <cpu/x86/msr.h> -#if 0 -static void disable_var_mtrr(unsigned reg) -{ - /* The invalid bit is kept in the mask so we simply - * clear the relevent mask register to disable a - * range. - */ - msr_t zero; - zero.lo = zero.hi = 0; - wrmsr(MTRRphysMask_MSR(reg), zero); -} -#endif - static void set_var_mtrr( unsigned reg, unsigned base, unsigned size, unsigned type) @@ -28,33 +15,13 @@ static void set_var_mtrr( basem.lo = base | type; basem.hi = 0; wrmsr(MTRRphysBase_MSR(reg), basem); - maskm.lo = ~(size - 1) | 0x800; - maskm.hi = (1<<(CONFIG_CPU_ADDR_BITS-32))-1; + maskm.lo = ~(size - 1) | MTRRphysMaskValid; + maskm.hi = (1 << (CONFIG_CPU_ADDR_BITS - 32)) - 1; wrmsr(MTRRphysMask_MSR(reg), maskm); } -#if 0 -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<<(CONFIG_CPU_ADDR_BITS-32))-1); - wrmsr(MTRRphysBase_MSR(reg), basem); - maskm.hi = (1<<(CONFIG_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); -} -#endif - -static inline void cache_lbmem(int type) +#if !defined(CONFIG_CACHE_AS_RAM) || (CONFIG_CACHE_AS_RAM == 0) +static void cache_lbmem(int type) { /* Enable caching for 0 - 1MB using variable mtrr */ disable_cache(); @@ -62,7 +29,6 @@ static inline void cache_lbmem(int type) enable_cache(); } -#if !defined(CONFIG_CACHE_AS_RAM) || (CONFIG_CACHE_AS_RAM == 0) /* the fixed and variable MTTRs are power-up with random values, * clear them to MTRR_TYPE_UNCACHEABLE for safty. */ @@ -119,7 +85,6 @@ static inline void early_mtrr_init(void) do_early_mtrr_init(mtrr_msrs); enable_cache(); } -#endif static inline int early_mtrr_init_detected(void) { @@ -131,7 +96,8 @@ static inline int early_mtrr_init_detected(void) * according to the documentation. */ msr = rdmsr(MTRRdefType_MSR); - return msr.lo & 0x00000800; + return msr.lo & MTRRdefTypeEn; } +#endif #endif /* EARLYMTRR_C */ |