/* SPDX-License-Identifier: GPL-2.0-or-later */ /* TODO: Check if this is still correct */ #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 <cpu/x86/cache.h> #include <cpu/x86/smm.h> #include <elog.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}, { .type = SMITYPE_PSP, .handler = psp_smi_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; }