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/* SPDX-License-Identifier: GPL-2.0-only */
#include <acpi/acpi_gnvs.h>
#include <acpi/acpi_pm.h>
#include <amdblocks/acpi.h>
#include <bootstate.h>
#include <soc/acpi.h>
#include <soc/nvs.h>
#include <soc/southbridge.h>
#include <types.h>
static int get_index_bit(uint32_t value, uint16_t limit)
{
uint16_t i;
uint32_t t;
if (limit > TOTAL_BITS(uint32_t))
return -1;
/* get a mask of valid bits. Ex limit = 3, set bits 0-2 */
t = (1ULL << limit) - 1;
if ((value & t) == 0)
return -1;
t = 1;
for (i = 0; i < limit; i++) {
if (value & t)
break;
t <<= 1;
}
return i;
}
static void pm_fill_gnvs(struct global_nvs *gnvs, const struct acpi_pm_gpe_state *state)
{
int index;
index = get_index_bit(state->pm1_sts & state->pm1_en, PM1_LIMIT);
if (index >= 0)
gnvs->pm1i = index;
index = get_index_bit(state->gpe0_sts & state->gpe0_en, GPE0_LIMIT);
if (index >= 0)
gnvs->gpei = index;
}
static void acpi_save_wake_source(void *unused)
{
const struct chipset_power_state *ps;
struct global_nvs *gnvs;
if (acpi_reset_gnvs_for_wake(&gnvs) < 0)
return;
if (acpi_fetch_pm_state(&ps, PS_CLAIMER_WAKE) < 0)
return;
pm_fill_gnvs(gnvs, &ps->gpe_state);
}
BOOT_STATE_INIT_ENTRY(BS_PRE_DEVICE, BS_ON_ENTRY, acpi_save_wake_source, NULL);
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