| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <arch/io.h> |
| #include <arch/romstage.h> |
| #include <device/mmio.h> |
| #include <device/pci_ops.h> |
| #include <console/console.h> |
| #include <cbmem.h> |
| #include <elog.h> |
| #include <romstage_handoff.h> |
| #include <string.h> |
| #include <timestamp.h> |
| #include <soc/iomap.h> |
| #include <soc/msr.h> |
| #include <soc/pci_devs.h> |
| #include <soc/pm.h> |
| #include <soc/romstage.h> |
| |
| static struct chipset_power_state power_state; |
| |
| static void migrate_power_state(int is_recovery) |
| { |
| struct chipset_power_state *ps_cbmem; |
| struct chipset_power_state *ps_car; |
| |
| ps_car = &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 struct chipset_power_state *fill_power_state(void) |
| { |
| struct chipset_power_state *ps = &power_state; |
| |
| ps->pm1_sts = inw(ACPI_BASE_ADDRESS + PM1_STS); |
| ps->pm1_en = inw(ACPI_BASE_ADDRESS + PM1_EN); |
| ps->pm1_cnt = inl(ACPI_BASE_ADDRESS + PM1_CNT); |
| ps->gpe0_sts = inl(ACPI_BASE_ADDRESS + GPE0_STS); |
| ps->gpe0_en = inl(ACPI_BASE_ADDRESS + GPE0_EN); |
| ps->tco_sts = inl(ACPI_BASE_ADDRESS + TCO_STS); |
| ps->prsts = read32((u32 *)(PMC_BASE_ADDRESS + PRSTS)); |
| ps->gen_pmcon1 = read32((u32 *)(PMC_BASE_ADDRESS + GEN_PMCON1)); |
| ps->gen_pmcon2 = read32((u32 *)(PMC_BASE_ADDRESS + GEN_PMCON2)); |
| |
| printk(BIOS_DEBUG, "pm1_sts: %04x pm1_en: %04x pm1_cnt: %08x\n", |
| ps->pm1_sts, ps->pm1_en, ps->pm1_cnt); |
| printk(BIOS_DEBUG, "gpe0_sts: %08x gpe0_en: %08x tco_sts: %08x\n", |
| ps->gpe0_sts, ps->gpe0_en, ps->tco_sts); |
| printk(BIOS_DEBUG, "prsts: %08x gen_pmcon1: %08x gen_pmcon2: %08x\n", |
| ps->prsts, ps->gen_pmcon1, ps->gen_pmcon2); |
| |
| return ps; |
| } |
| |
| /* Return 0, 3, or 5 to indicate the previous sleep state. */ |
| static int chipset_prev_sleep_state(const struct chipset_power_state *ps) |
| { |
| /* Default to S0. */ |
| int prev_sleep_state = ACPI_S0; |
| |
| if (ps->pm1_sts & WAK_STS) { |
| switch (acpi_sleep_from_pm1(ps->pm1_cnt)) { |
| case ACPI_S3: |
| if (CONFIG(HAVE_ACPI_RESUME)) |
| prev_sleep_state = ACPI_S3; |
| break; |
| case ACPI_S5: |
| prev_sleep_state = ACPI_S5; |
| break; |
| } |
| /* Clear SLP_TYP. */ |
| outl(ps->pm1_cnt & ~(SLP_TYP), ACPI_BASE_ADDRESS + PM1_CNT); |
| } |
| |
| if (ps->gen_pmcon1 & (PWR_FLR | SUS_PWR_FLR)) { |
| prev_sleep_state = ACPI_S5; |
| } |
| |
| return prev_sleep_state; |
| } |
| |
| /* Entry from cpu/intel/car/romstage.c */ |
| void mainboard_romstage_entry(void) |
| { |
| struct chipset_power_state *ps; |
| int prev_sleep_state; |
| struct mrc_params mp; |
| |
| set_max_freq(); |
| |
| punit_init(); |
| |
| gfx_init(); |
| |
| memset(&mp, 0, sizeof(mp)); |
| mainboard_fill_mrc_params(&mp); |
| |
| timestamp_add_now(TS_BEFORE_INITRAM); |
| |
| ps = fill_power_state(); |
| prev_sleep_state = chipset_prev_sleep_state(ps); |
| |
| printk(BIOS_DEBUG, "prev_sleep_state = S%d\n", prev_sleep_state); |
| |
| int s3resume = prev_sleep_state == ACPI_S3; |
| |
| elog_boot_notify(s3resume); |
| |
| /* Initialize RAM */ |
| raminit(&mp, prev_sleep_state); |
| |
| timestamp_add_now(TS_AFTER_INITRAM); |
| |
| romstage_handoff_init(s3resume); |
| } |