diff options
Diffstat (limited to 'src/soc/intel/skylake/cpu.c')
| -rw-r--r-- | src/soc/intel/skylake/cpu.c | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/src/soc/intel/skylake/cpu.c b/src/soc/intel/skylake/cpu.c index 1f26093794..0cc9bcaeed 100644 --- a/src/soc/intel/skylake/cpu.c +++ b/src/soc/intel/skylake/cpu.c @@ -102,118 +102,6 @@ static const u8 power_limit_time_msr_to_sec[] = { [0x11] = 128, }; -/* - * The core 100MHz BLCK is disabled in deeper c-states. One needs to calibrate - * the 100MHz BCLCK against the 24MHz BLCK to restore the clocks properly - * when a core is woken up. - */ -static int pcode_ready(void) -{ - int wait_count; - const int delay_step = 10; - - wait_count = 0; - do { - if (!(MCHBAR32(BIOS_MAILBOX_INTERFACE) & MAILBOX_RUN_BUSY)) - return 0; - wait_count += delay_step; - udelay(delay_step); - } while (wait_count < 1000); - - return -1; -} - -static void calibrate_24mhz_bclk(void) -{ - int err_code; - - if (pcode_ready() < 0) { - printk(BIOS_ERR, "PCODE: mailbox timeout on wait ready.\n"); - return; - } - - /* A non-zero value initiates the PCODE calibration. */ - MCHBAR32(BIOS_MAILBOX_DATA) = ~0; - MCHBAR32(BIOS_MAILBOX_INTERFACE) = - MAILBOX_RUN_BUSY | MAILBOX_BIOS_CMD_FSM_MEASURE_INTVL; - - if (pcode_ready() < 0) { - printk(BIOS_ERR, "PCODE: mailbox timeout on completion.\n"); - return; - } - - err_code = MCHBAR32(BIOS_MAILBOX_INTERFACE) & 0xff; - - printk(BIOS_DEBUG, "PCODE: 24MHz BLCK calibration response: %d\n", - err_code); - - /* Read the calibrated value. */ - MCHBAR32(BIOS_MAILBOX_INTERFACE) = - MAILBOX_RUN_BUSY | MAILBOX_BIOS_CMD_READ_CALIBRATION; - - if (pcode_ready() < 0) { - printk(BIOS_ERR, "PCODE: mailbox timeout on read.\n"); - return; - } - - printk(BIOS_DEBUG, "PCODE: 24MHz BLCK calibration value: 0x%08x\n", - MCHBAR32(BIOS_MAILBOX_DATA)); -} - -static void initialize_vr_config(void) -{ - msr_t msr; - - printk(BIOS_DEBUG, "Initializing VR config.\n"); - - /* Configure VR_CURRENT_CONFIG. */ - msr = rdmsr(MSR_VR_CURRENT_CONFIG); - /* - * Preserve bits 63 and 62. Bit 62 is PSI4 enable, but it is only valid - * on ULT systems. - */ - msr.hi &= 0xc0000000; - msr.hi |= (0x01 << (52 - 32)); /* PSI3 threshold - 1A. */ - msr.hi |= (0x05 << (42 - 32)); /* PSI2 threshold - 5A. */ - msr.hi |= (0x14 << (32 - 32)); /* PSI1 threshold - 20A. */ - msr.hi |= (1 << (62 - 32)); /* Enable PSI4 */ - /* Leave the max instantaneous current limit (12:0) to default. */ - wrmsr(MSR_VR_CURRENT_CONFIG, msr); - - /* Configure VR_MISC_CONFIG MSR. */ - msr = rdmsr(MSR_VR_MISC_CONFIG); - /* Set the IOUT_SLOPE scalar applied to dIout in U10.1.9 format. */ - msr.hi &= ~(0x3ff << (40 - 32)); - msr.hi |= (0x200 << (40 - 32)); /* 1.0 */ - /* Set IOUT_OFFSET to 0. */ - msr.hi &= ~0xff; - /* Set exit ramp rate to fast. */ - msr.hi |= (1 << (50 - 32)); - /* Set entry ramp rate to slow. */ - msr.hi &= ~(1 << (51 - 32)); - /* Enable decay mode on C-state entry. */ - msr.hi |= (1 << (52 - 32)); - /* Set the slow ramp rate to be fast ramp rate / 4 */ - msr.hi &= ~(0x3 << (53 - 32)); - msr.hi |= (0x01 << (53 - 32)); - /* Set MIN_VID (31:24) to allow CPU to have full control. */ - msr.lo &= ~0xff000000; - wrmsr(MSR_VR_MISC_CONFIG, msr); - - /* Configure VR_MISC_CONFIG2 MSR. */ - msr = rdmsr(MSR_VR_MISC_CONFIG2); - msr.lo &= ~0xffff; - /* - * Allow CPU to control minimum voltage completely (15:8) and - * set the fast ramp voltage in 10mV steps. - */ - if (cpu_family_model() == SKYLAKE_FAMILY_ULT) - msr.lo |= 0x006a; /* 1.56V */ - else - msr.lo |= 0x006f; /* 1.60V */ - wrmsr(MSR_VR_MISC_CONFIG2, msr); -} - int cpu_config_tdp_levels(void) { msr_t platform_info; @@ -427,9 +315,6 @@ static void bsp_init_before_ap_bringup(struct bus *cpu_bus) x86_setup_fixed_mtrrs(); x86_setup_var_mtrrs(cpuid_eax(0x80000008) & 0xff, 2); x86_mtrr_check(); - - initialize_vr_config(); - calibrate_24mhz_bclk(); } /* All CPUs including BSP will run the following function. */ |