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soc/intel/common/block: Manage power state variable from common PMC block 

This patch helps managing power state variables from within the
library. Adds migrate_power_state which migrates the chipset
power state variable, reads global power variable and adds it
in cbmem for future use. This also adds get_soc_power_state_values
function which returns the power state variable from cbmem or
global power state variable if cbmem is not populated yet.

Change-Id: If65341c1492e3a35a1a927100e0d893f923b9e68
Signed-off-by: Shaunak Saha <shaunak.saha@intel.com>
Reviewed-on: https://review.coreboot.org/21851
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Shaunak Saha 2017-10-02 15:01:33 -07:00 committed by Aaron Durbin
parent a75d6808ca
commit f073872e22
2 changed files with 38 additions and 1 deletions
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3
src/soc/intel/common/block/include/intelblocks/pmclib.h
View File

@ -150,6 +150,9 @@ void pmc_global_reset_lock(void);
/* Rewrite the gpe0 registers in cbmem to proper values as per routing table */
void pmc_fixup_power_state(void);
/* Returns the power state structure */
struct chipset_power_state *pmc_get_power_state(void);
/*
* Reads and prints ACPI specific PM registers which are common across
* chipsets. Returns the previous sleep state which is one of ACPI_SX values.

36
src/soc/intel/common/block/pmc/pmclib.c
View File

@ -13,6 +13,7 @@
* GNU General Public License for more details.
*/
#include <arch/early_variables.h>
#include <arch/io.h>
#include <cbmem.h>
#include <console/console.h>
@ -20,9 +21,42 @@
#include <intelblocks/pmclib.h>
#include <intelblocks/gpio.h>
#include <soc/pm.h>
#include <string.h>
#include <timer.h>
#include <vboot/vboot_common.h>
static struct chipset_power_state power_state CAR_GLOBAL;
struct chipset_power_state *pmc_get_power_state(void)
{
struct chipset_power_state *ptr = NULL;
if (cbmem_possibly_online())
ptr = cbmem_find(CBMEM_ID_POWER_STATE);
/* cbmem is online but ptr is not populated yet */
if (ptr == NULL && !(ENV_RAMSTAGE || ENV_POSTCAR))
return car_get_var_ptr(&power_state);
return ptr;
}
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_cbmem = cbmem_add(CBMEM_ID_POWER_STATE, sizeof(*ps_cbmem));
if (ps_cbmem == NULL) {
printk(BIOS_DEBUG, "Not adding power state to cbmem!\n");
return;
}
memcpy(ps_cbmem, ps_car, sizeof(*ps_cbmem));
}
ROMSTAGE_CBMEM_INIT_HOOK(migrate_power_state)
static void print_num_status_bits(int num_bits, uint32_t status,
const char *const bit_names[])
{
@ -322,7 +356,7 @@ void pmc_fixup_power_state(void)
int i;
struct chipset_power_state *ps;
ps = cbmem_find(CBMEM_ID_POWER_STATE);
ps = pmc_get_power_state();
if (ps == NULL)
return;