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/* 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 <cpu/x86/cache.h>
#include <cpu/x86/smm.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;
uint16_t pm1cnt;
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);
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;
}
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