| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| |
| #include <acpi/acpi.h> |
| #include <amdblocks/acpi.h> |
| #include <amdblocks/acpimmio.h> |
| #include <amdblocks/psp.h> |
| #include <amdblocks/smi.h> |
| #include <amdblocks/smm.h> |
| #include <arch/hlt.h> |
| #include <arch/io.h> |
| #include <console/console.h> |
| #include <console/cbmem_console.h> |
| #include <cpu/x86/cache.h> |
| #include <cpu/x86/smm.h> |
| #include <elog.h> |
| #include <soc/psp_transfer.h> |
| #include <soc/smi.h> |
| #include <soc/smu.h> |
| #include <soc/southbridge.h> |
| #include <types.h> |
| |
| /* |
| * Both the psp_notify_sx_info and the smu_sx_entry call will clobber the SMN index register |
| * during the SMN accesses. Since the SMI handler is the last thing that gets called before |
| * entering S3, this won't interfere with any indirect SMN accesses via the same register pair. |
| */ |
| static void fch_slp_typ_handler(void) |
| { |
| uint32_t pci_ctrl, reg32; |
| uint16_t pm1cnt, reg16; |
| uint8_t slp_typ, rst_ctrl; |
| |
| /* Figure out SLP_TYP */ |
| pm1cnt = acpi_read16(MMIO_ACPI_PM1_CNT_BLK); |
| printk(BIOS_SPEW, "SMI#: SLP = 0x%04x\n", pm1cnt); |
| slp_typ = acpi_sleep_from_pm1(pm1cnt); |
| |
| /* Do any mainboard sleep handling */ |
| mainboard_smi_sleep(slp_typ); |
| |
| switch (slp_typ) { |
| case ACPI_S0: |
| printk(BIOS_DEBUG, "SMI#: Entering S0 (On)\n"); |
| break; |
| case ACPI_S3: |
| printk(BIOS_DEBUG, "SMI#: Entering S3 (Suspend-To-RAM)\n"); |
| break; |
| case ACPI_S4: |
| printk(BIOS_DEBUG, "SMI#: Entering S4 (Suspend-To-Disk)\n"); |
| break; |
| case ACPI_S5: |
| printk(BIOS_DEBUG, "SMI#: Entering S5 (Soft Power off)\n"); |
| break; |
| default: |
| printk(BIOS_DEBUG, "SMI#: ERROR: SLP_TYP reserved\n"); |
| break; |
| } |
| |
| if (slp_typ >= ACPI_S3) { |
| wbinvd(); |
| |
| clear_all_smi_status(); |
| |
| /* Do not send SMI before AcpiPm1CntBlkx00[SlpTyp] */ |
| pci_ctrl = pm_read32(PM_PCI_CTRL); |
| pci_ctrl &= ~FORCE_SLPSTATE_RETRY; |
| pm_write32(PM_PCI_CTRL, pci_ctrl); |
| |
| /* Enable SlpTyp */ |
| rst_ctrl = pm_read8(PM_RST_CTRL1); |
| rst_ctrl |= SLPTYPE_CONTROL_EN; |
| pm_write8(PM_RST_CTRL1, rst_ctrl); |
| |
| /* |
| * Before the final command, check if there's pending wake |
| * event. Read enable first, so that reading the actual status |
| * is as close as possible to entering S3. The idea is to |
| * minimize the opportunity for a wake event to happen before |
| * actually entering S3. If there's a pending wake event, log |
| * it and continue normal path. S3 will fail and the wake event |
| * becomes a SCI. |
| */ |
| if (CONFIG(ELOG_GSMI)) { |
| reg16 = acpi_read16(MMIO_ACPI_PM1_EN); |
| reg16 &= acpi_read16(MMIO_ACPI_PM1_STS); |
| if (reg16) |
| elog_add_extended_event( |
| ELOG_SLEEP_PENDING_PM1_WAKE, |
| (u32)reg16); |
| |
| reg32 = acpi_read32(MMIO_ACPI_GPE0_EN); |
| reg32 &= acpi_read32(MMIO_ACPI_GPE0_STS); |
| if (reg32) |
| elog_add_extended_event( |
| ELOG_SLEEP_PENDING_GPE0_WAKE, |
| reg32); |
| } /* if (CONFIG(ELOG_GSMI)) */ |
| |
| if (slp_typ == ACPI_S3) |
| psp_notify_sx_info(ACPI_S3); |
| |
| smu_sx_entry(); /* Leave SlpTypeEn clear, SMU will set */ |
| printk(BIOS_ERR, "System did not go to sleep\n"); |
| hlt(); |
| } |
| } |
| |
| /* |
| * Table of functions supported in the SMI handler. Note that SMI source setup |
| * in fch.c is unrelated to this list. |
| */ |
| static const struct smi_sources_t smi_sources[] = { |
| { .type = SMITYPE_SMI_CMD_PORT, .handler = fch_apmc_smi_handler }, |
| { .type = SMITYPE_SLP_TYP, .handler = fch_slp_typ_handler}, |
| }; |
| |
| void *get_smi_source_handler(int source) |
| { |
| size_t i; |
| |
| for (i = 0 ; i < ARRAY_SIZE(smi_sources) ; i++) |
| if (smi_sources[i].type == source) |
| return smi_sources[i].handler; |
| |
| return NULL; |
| } |
| |
| void smm_soc_early_init(void) |
| { |
| if (CONFIG(VBOOT_STARTS_BEFORE_BOOTBLOCK) && __CBMEM_CONSOLE_ENABLE__) |
| replay_transfer_buffer_cbmemc(); |
| } |