Change in coreboot[master]: mb/google/guybrush: Enable EC SMI handler

[Raul Rangel (Code Review)]

Raul Rangel has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/62599 )

Change subject: mb/google/guybrush: Enable EC SMI handler
......................................................................

mb/google/guybrush: Enable EC SMI handler

This change allows the EC to send SMM interrupts to the AP. SMM
interrupts are only enabled during boot, and are disabled once ACPI is
enabled. The only event that is currently handled by
`chromeec_process_one_event` is EC_HOST_EVENT_LID_CLOSED. This is used
to power off the system in case the OS never loaded and the lid was
closed.

BUG=b:222694093
TEST=Boot guybrush, run `lpc smi` on EC console. Verify SMM handler
runs.

Signed-off-by: Raul E Rangel 
Change-Id: I52b96b1b7c3c25a8355eaba4e84dbce49451b7f8
---
M src/mainboard/google/guybrush/ec.c
M src/mainboard/google/guybrush/smihandler.c
2 files changed, 19 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/99/62599/1

diff --git a/src/mainboard/google/guybrush/ec.c b/src/mainboard/google/guybrush/ec.c
index f62ca20..da3f420 100644
--- a/src/mainboard/google/guybrush/ec.c
+++ b/src/mainboard/google/guybrush/ec.c
@@ -21,6 +21,7 @@
    const struct google_chromeec_event_info info = {
    	.log_events = MAINBOARD_EC_LOG_EVENTS,
    	.sci_events = MAINBOARD_EC_SCI_EVENTS,
+		.smi_events = MAINBOARD_EC_SMI_EVENTS,
    	.s3_wake_events = MAINBOARD_EC_S3_WAKE_EVENTS,
    	.s5_wake_events = MAINBOARD_EC_S5_WAKE_EVENTS,
    	.s0ix_wake_events = MAINBOARD_EC_S0IX_WAKE_EVENTS,
@@ -30,4 +31,6 @@

/* Configure eSPI VW SCI events */
    gpe_configure_sci(espi_sci_sources, ARRAY_SIZE(espi_sci_sources));
+
+	configure_smi(SMITYPE_ESPI_SMI, SMI_MODE_SMI);
 }
diff --git a/src/mainboard/google/guybrush/smihandler.c b/src/mainboard/google/guybrush/smihandler.c
index f67ff31..bcf883a 100644
--- a/src/mainboard/google/guybrush/smihandler.c
+++ b/src/mainboard/google/guybrush/smihandler.c
@@ -1,11 +1,13 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */

+#include <amdblocks/smm.h>
 #include <baseboard/variants.h>
 #include <console/console.h>
 #include <cpu/x86/smm.h>
 #include <ec/google/chromeec/ec.h>
 #include <ec/google/chromeec/smm.h>
 #include <elog.h>
+#include <soc/smi.h>
 #include <variant/ec.h>

void mainboard_smi_gpi(u32 gpi_sts)
@@ -36,3 +38,17 @@
 {
    google_chromeec_log_events(MAINBOARD_EC_LOG_EVENTS | MAINBOARD_EC_S0IX_WAKE_EVENTS);
 }
+
+void mainboard_handle_smi(int event)
+{
+	switch (event) {
+	case SMITYPE_ESPI_SMI:
+		printk(BIOS_DEBUG, "Processing EC SMI\n");
+
+		chromeec_smi_process_events();
+		break;
+	default:
+		printk(BIOS_WARNING, "SMI event %d is missing handler\n", event);
+		return;
+	}
+}