diff options
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/intel/apollolake/bootblock/bootblock.c | 14 | ||||
| -rw-r--r-- | src/soc/intel/apollolake/include/soc/cpu.h | 2 |
2 files changed, 16 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/bootblock/bootblock.c b/src/soc/intel/apollolake/bootblock/bootblock.c index 833f531936..cd23f5984b 100644 --- a/src/soc/intel/apollolake/bootblock/bootblock.c +++ b/src/soc/intel/apollolake/bootblock/bootblock.c @@ -20,6 +20,7 @@ #include <device/pci.h> #include <lib.h> #include <soc/bootblock.h> +#include <soc/iomap.h> #include <soc/cpu.h> #include <soc/gpio.h> #include <soc/northbridge.h> @@ -36,6 +37,17 @@ static void tpm_enable(void) gpio_configure_pads(tpm_spi_configs, ARRAY_SIZE(tpm_spi_configs)); } +static void enable_pm_timer(void) +{ + /* ACPI PM timer emulation */ + msr_t msr; + /* Multiplier value that somehow 3.579545MHz freq */ + msr.hi = 0x2FBA2E25; + /* Set PM1 timer IO port and enable*/ + msr.lo = EMULATE_PM_TMR_EN | (ACPI_PMIO_BASE + R_ACPI_PM1_TMR); + wrmsr(MSR_EMULATE_PM_TMR, msr); +} + void asmlinkage bootblock_c_entry(void) { device_t dev = NB_DEV_ROOT; @@ -80,5 +92,7 @@ void bootblock_soc_early_init(void) if (IS_ENABLED(CONFIG_TPM_ON_FAST_SPI)) tpm_enable(); + enable_pm_timer(); + cache_bios_region(); } diff --git a/src/soc/intel/apollolake/include/soc/cpu.h b/src/soc/intel/apollolake/include/soc/cpu.h index aaa2001f8b..b731d4f539 100644 --- a/src/soc/intel/apollolake/include/soc/cpu.h +++ b/src/soc/intel/apollolake/include/soc/cpu.h @@ -32,6 +32,8 @@ void apollolake_init_cpus(struct device *dev); #define MSR_POWER_MISC 0x120 #define MSR_CORE_THREAD_COUNT 0x35 #define MSR_EVICT_CTL 0x2e0 +#define MSR_EMULATE_PM_TMR 0x121 +#define EMULATE_PM_TMR_EN (1 << 16) #define BASE_CLOCK_MHZ 100 |