| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <acpi/acpi_gnvs.h> |
| #include <acpi/acpi_pm.h> |
| #include <bootstate.h> |
| #include <console/console.h> |
| #include <intelblocks/acpi_wake_source.h> |
| #include <soc/nvs.h> |
| #include <soc/pm.h> |
| #include <stdint.h> |
| |
| /* Save wake source data for ACPI _SWS methods in NVS */ |
| static void pm_fill_gnvs(struct global_nvs *gnvs, const struct chipset_power_state *ps) |
| { |
| uint32_t pm1, *gpe0; |
| int index, gpe_reg, gpe_reg_count; |
| int reg_size = sizeof(uint32_t) * 8; |
| |
| gpe_reg_count = soc_fill_acpi_wake(ps, &pm1, &gpe0); |
| if (gpe_reg_count < 0) |
| return; |
| |
| /* Scan for first set bit in PM1 */ |
| for (index = 0; index < reg_size; index++) { |
| if (pm1 & 1) |
| break; |
| pm1 >>= 1; |
| } |
| |
| if (index < 16) |
| gnvs->pm1i = index; |
| |
| /* Scan for first set bit in GPE registers */ |
| for (gpe_reg = 0; gpe_reg < gpe_reg_count; gpe_reg++) { |
| uint32_t gpe = gpe0[gpe_reg]; |
| int start = gpe_reg * reg_size; |
| int end = start + reg_size; |
| |
| for (index = start; index < end; index++) { |
| if (gpe & 1) |
| break; |
| gpe >>= 1; |
| } |
| } |
| |
| if (index < gpe_reg_count * reg_size) |
| 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); |
| |
| printk(BIOS_DEBUG, "ACPI _SWS is PM1 Index %lld GPE Index %lld\n", |
| (long long)gnvs->pm1i, (long long)gnvs->gpei); |
| } |
| |
| BOOT_STATE_INIT_ENTRY(BS_PRE_DEVICE, BS_ON_ENTRY, acpi_save_wake_source, NULL); |