1 files changed, 126 insertions, 0 deletions
diff --git a/src/soc/amd/phoenix/smihandler.c b/src/soc/amd/phoenix/smihandler.c
new file mode 100644
index 0000000000..a0099cfe94
--- /dev/null
+++ b/src/soc/amd/phoenix/smihandler.c
@@ -0,0 +1,126 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/* TODO: Update for Phoenix */
+
+#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},
+};
+
+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;
+}