Change in coreboot[master]: soc/intel/skylake: Create acpi_get_sleep_type() to get previous sleep...

[Subrata Banik (Code Review)]

Subrata Banik has uploaded this change for review. ( https://review.coreboot.org/21423

Change subject: soc/intel/skylake: Create acpi_get_sleep_type() to get previous sleep state
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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 
---
M src/soc/intel/skylake/romstage/power_state.c
1 file changed, 16 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/23/21423/1

diff --git a/src/soc/intel/skylake/romstage/power_state.c b/src/soc/intel/skylake/romstage/power_state.c
index 61851a5..f58ef16 100644
--- a/src/soc/intel/skylake/romstage/power_state.c
+++ b/src/soc/intel/skylake/romstage/power_state.c
@@ -14,6 +14,7 @@
  * GNU General Public License for more details.
  */

+#include <arch/acpi.h>
 #include <arch/early_variables.h>
 #include <arch/io.h>
 #include <cbmem.h>
@@ -35,12 +36,17 @@

static struct chipset_power_state power_state CAR_GLOBAL;

+static struct chipset_power_state *get_power_state(void)
+{
+	return (struct chipset_power_state *)car_get_var_ptr(&power_state);
+}
+
 static void migrate_power_state(int is_recovery)
 {
    struct chipset_power_state *ps_cbmem;
    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));

if (ps_cbmem == NULL) {
@@ -129,7 +135,7 @@
 {
    uint16_t tcobase;
    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();

@@ -161,6 +167,14 @@
    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)
 {
    return acpi_sleep_from_pm1(inl(ACPI_BASE_ADDRESS + PM1_CNT)) == ACPI_S3;