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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>
This commit is contained in:
Subrata Banik 2017-09-06 18:38:39 +05:30
parent 6dc148a42b
commit 534b23639b
1 changed files with 16 additions and 2 deletions
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18
src/soc/intel/skylake/romstage/power_state.c
View File

@ -14,6 +14,7 @@
* GNU General Public License for more details. * GNU General Public License for more details.
*/ */
#include <arch/acpi.h>
#include <arch/early_variables.h> #include <arch/early_variables.h>
#include <arch/io.h> #include <arch/io.h>
#include <cbmem.h> #include <cbmem.h>
@ -35,12 +36,17 @@
static struct chipset_power_state power_state CAR_GLOBAL; static struct chipset_power_state power_state CAR_GLOBAL;
static struct chipset_power_state *get_power_state(void)
{
return car_get_var_ptr(&power_state);
}
static void migrate_power_state(int is_recovery) static void migrate_power_state(int is_recovery)
{ {
struct chipset_power_state *ps_cbmem; struct chipset_power_state *ps_cbmem;
struct chipset_power_state *ps_car; struct chipset_power_state *ps_car;
ps_car = car_get_var_ptr(&power_state); ps_car = get_power_state();
ps_cbmem = cbmem_add(CBMEM_ID_POWER_STATE, sizeof(*ps_cbmem)); ps_cbmem = cbmem_add(CBMEM_ID_POWER_STATE, sizeof(*ps_cbmem));
if (ps_cbmem == NULL) { if (ps_cbmem == NULL) {
@ -129,7 +135,7 @@ struct chipset_power_state *fill_power_state(void)
{ {
uint16_t tcobase; uint16_t tcobase;
uint8_t *pmc; uint8_t *pmc;
struct chipset_power_state *ps = car_get_var_ptr(&power_state); struct chipset_power_state *ps = get_power_state();
tcobase = smbus_tco_regs(); tcobase = smbus_tco_regs();
@ -161,6 +167,14 @@ struct chipset_power_state *fill_power_state(void)
return ps; return ps;
} }
int acpi_get_sleep_type(void)
{
struct chipset_power_state *ps;
ps = get_power_state();
return ps->prev_sleep_state;
}
int vboot_platform_is_resuming(void) int vboot_platform_is_resuming(void)
{ {
return acpi_sleep_from_pm1(inl(ACPI_BASE_ADDRESS + PM1_CNT)) == ACPI_S3; return acpi_sleep_from_pm1(inl(ACPI_BASE_ADDRESS + PM1_CNT)) == ACPI_S3;