diff options
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/intel/model_206ax/bootblock.c | 62 | ||||
| -rw-r--r-- | src/cpu/intel/model_206ax/model_206ax.h | 5 |
2 files changed, 67 insertions, 0 deletions
diff --git a/src/cpu/intel/model_206ax/bootblock.c b/src/cpu/intel/model_206ax/bootblock.c index 4061bb7b5a..dbc35914cb 100644 --- a/src/cpu/intel/model_206ax/bootblock.c +++ b/src/cpu/intel/model_206ax/bootblock.c @@ -22,6 +22,8 @@ #include <cpu/x86/cache.h> #include <cpu/x86/msr.h> #include <cpu/x86/mtrr.h> +#include <arch/io.h> +#include <arch/romcc_io.h> #if !CONFIG_MICROCODE_IN_CBFS static const uint32_t microcode_updates[] = { @@ -30,6 +32,14 @@ static const uint32_t microcode_updates[] = { #endif #include <cpu/intel/microcode/microcode.c> +#include "model_206ax.h" + +#if CONFIG_SOUTHBRIDGE_INTEL_BD82X6X || CONFIG_SOUTHBRIDGE_INTEL_C216 +/* Needed for RCBA access to set Soft Reset Data register */ +#include <southbridge/intel/bd82x6x/pch.h> +#else +#error "CPU must be paired with Intel BD82X6X or C216 southbridge" +#endif static void set_var_mtrr( unsigned reg, unsigned base, unsigned size, unsigned type) @@ -60,8 +70,60 @@ static void enable_rom_caching(void) wrmsr(MTRRdefType_MSR, msr); } +static void set_flex_ratio_to_tdp_nominal(void) +{ + msr_t flex_ratio, msr; + u32 soft_reset; + u8 nominal_ratio; + + /* Minimum CPU revision for configurable TDP support */ + if (cpuid_eax(1) < IVB_CONFIG_TDP_MIN_CPUID) + return; + + /* Check for Flex Ratio support */ + flex_ratio = rdmsr(MSR_FLEX_RATIO); + if (!(flex_ratio.lo & FLEX_RATIO_EN)) + return; + + /* Check for >0 configurable TDPs */ + msr = rdmsr(MSR_PLATFORM_INFO); + if (((msr.hi >> 1) & 3) == 0) + return; + + /* Use nominal TDP ratio for flex ratio */ + msr = rdmsr(MSR_CONFIG_TDP_NOMINAL); + nominal_ratio = msr.lo & 0xff; + + /* See if flex ratio is already set to nominal TDP ratio */ + if (((flex_ratio.lo >> 8) & 0xff) == nominal_ratio) + return; + + /* Set flex ratio to nominal TDP ratio */ + flex_ratio.lo &= ~0xff00; + flex_ratio.lo |= nominal_ratio << 8; + flex_ratio.lo |= FLEX_RATIO_LOCK; + wrmsr(MSR_FLEX_RATIO, flex_ratio); + + /* Set flex ratio in soft reset data register bits 11:6. + * RCBA region is enabled in southbridge bootblock */ + soft_reset = RCBA32(SOFT_RESET_DATA); + soft_reset &= ~(0x3f << 6); + soft_reset |= (nominal_ratio & 0x3f) << 6; + RCBA32(SOFT_RESET_DATA) = soft_reset; + + /* Set soft reset control to use register value */ + RCBA32_OR(SOFT_RESET_CTRL, 1); + + /* Issue warm reset, will be "CPU only" due to soft reset data */ + outb(0x0, 0xcf9); + outb(0x6, 0xcf9); + asm("hlt"); +} + static void bootblock_cpu_init(void) { + /* Set flex ratio and reset if needed */ + set_flex_ratio_to_tdp_nominal(); enable_rom_caching(); #if CONFIG_MICROCODE_IN_CBFS intel_update_microcode_from_cbfs(); diff --git a/src/cpu/intel/model_206ax/model_206ax.h b/src/cpu/intel/model_206ax/model_206ax.h index fbd57a5c19..8259d89880 100644 --- a/src/cpu/intel/model_206ax/model_206ax.h +++ b/src/cpu/intel/model_206ax/model_206ax.h @@ -29,6 +29,9 @@ #define CPUID_VMX (1 << 5) #define CPUID_SMX (1 << 6) #define MSR_FEATURE_CONFIG 0x13c +#define MSR_FLEX_RATIO 0x194 +#define FLEX_RATIO_LOCK (1 << 20) +#define FLEX_RATIO_EN (1 << 16) #define IA32_PLATFORM_DCA_CAP 0x1f8 #define IA32_MISC_ENABLE 0x1a0 #define IA32_PERF_CTL 0x199 @@ -95,6 +98,7 @@ #define PSS_LATENCY_TRANSITION 10 #define PSS_LATENCY_BUSMASTER 10 +#ifndef __ROMCC__ #ifdef __SMM__ /* Lock MSRs */ void intel_model_206ax_finalize_smm(void); @@ -103,5 +107,6 @@ void intel_model_206ax_finalize_smm(void); void set_power_limits(u8 power_limit_1_time); int cpu_config_tdp_levels(void); #endif +#endif #endif |