soc/intel/skylake: Create acpi_get_sleep_type() to get previous sleep state
This patch implements soc function to get previous sleep state using chipset_power_state global structure. acpi_get_sleep_type is needed in PRE_RAM stage when soc selects CONFIG_EARLY_EBDA_INIT kconfig option. Change-Id: I79acbfc09c8d255fbf9d73e49e8c7764f3f3fac6 Signed-off-by: Subrata Banik <subrata.banik@intel.com> Reviewed-on: https://review.coreboot.org/21423 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
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@ -14,6 +14,7 @@
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* GNU General Public License for more details.
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*/
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#include <arch/acpi.h>
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#include <arch/early_variables.h>
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#include <arch/io.h>
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#include <cbmem.h>
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@ -35,12 +36,17 @@
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static struct chipset_power_state power_state CAR_GLOBAL;
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static struct chipset_power_state *get_power_state(void)
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{
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return car_get_var_ptr(&power_state);
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}
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static void migrate_power_state(int is_recovery)
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{
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struct chipset_power_state *ps_cbmem;
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struct chipset_power_state *ps_car;
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ps_car = car_get_var_ptr(&power_state);
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ps_car = get_power_state();
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ps_cbmem = cbmem_add(CBMEM_ID_POWER_STATE, sizeof(*ps_cbmem));
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if (ps_cbmem == NULL) {
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@ -129,7 +135,7 @@ struct chipset_power_state *fill_power_state(void)
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{
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uint16_t tcobase;
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uint8_t *pmc;
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struct chipset_power_state *ps = car_get_var_ptr(&power_state);
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struct chipset_power_state *ps = get_power_state();
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tcobase = smbus_tco_regs();
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@ -161,6 +167,14 @@ struct chipset_power_state *fill_power_state(void)
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return ps;
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}
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int acpi_get_sleep_type(void)
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{
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struct chipset_power_state *ps;
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ps = get_power_state();
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return ps->prev_sleep_state;
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}
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int vboot_platform_is_resuming(void)
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{
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return acpi_sleep_from_pm1(inl(ACPI_BASE_ADDRESS + PM1_CNT)) == ACPI_S3;
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