1 files changed, 117 insertions, 0 deletions
diff --git a/src/drivers/elog/gsmi.c b/src/drivers/elog/gsmi.c
new file mode 100644
index 0000000000..dac1af413a
--- /dev/null
+++ b/src/drivers/elog/gsmi.c
@@ -0,0 +1,117 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2012 The ChromiumOS Authors.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ */
+
+#include <arch/io.h>
+#include <console/console.h>
+#include <cpu/x86/smm.h>
+#include <elog.h>
+
+#define GSMI_RET_SUCCESS		0x00
+#define GSMI_RET_INVALID_PARAMETER	0x82
+#define GSMI_RET_UNSUPPORTED		0x83
+
+#define GSMI_CMD_SET_EVENT_LOG		0x08
+#define GSMI_CMD_CLEAR_EVENT_LOG	0x09
+#define GSMI_CMD_HANDSHAKE_TYPE		0xc1
+
+#define GSMI_HANDSHAKE_NONE		0x7f
+#define GSMI_LOG_ENTRY_TYPE_KERNEL	0xDEAD
+
+struct gsmi_set_eventlog_param {
+	u32 data_ptr;
+	u32 data_len;
+	u32 type;
+} __attribute__ ((packed));
+
+struct gsmi_set_eventlog_type1 {
+	u16 type;
+	u32 instance;
+} __attribute__ ((packed));
+
+struct gsmi_clear_eventlog_param {
+	u32 percentage;
+	u32 data_type;
+} __attribute__ ((packed));
+
+/* Param is usually EBX, ret in EAX */
+u32 gsmi_exec(u8 command, u32 *param)
+{
+	struct gsmi_set_eventlog_param *sel;
+	struct gsmi_set_eventlog_type1 *type1;
+	struct gsmi_clear_eventlog_param *cel;
+	u32 ret = GSMI_RET_UNSUPPORTED;
+
+	switch (command) {
+	case GSMI_CMD_HANDSHAKE_TYPE:
+		/* Used by kernel to verify basic SMI functionality */
+		printk(BIOS_DEBUG, "GSMI Handshake\n");
+		ret = GSMI_HANDSHAKE_NONE;
+		break;
+
+	case GSMI_CMD_SET_EVENT_LOG:
+		/* Look for a type1 event */
+		sel = (struct gsmi_set_eventlog_param *)(*param);
+		if (!sel)
+			break;
+
+		/* Make sure the input is usable */
+		if (sel->type != 1 && sel->data_ptr != 0 &&
+		    sel->data_len != sizeof(struct gsmi_set_eventlog_type1))
+			break;
+
+		/* Event structure within the data buffer */
+		type1 = (struct gsmi_set_eventlog_type1 *)(sel->data_ptr);
+		if (!type1)
+			break;
+
+		printk(BIOS_DEBUG, "GSMI Set Event Log "
+		       "(type=0x%x instance=0x%x)\n",
+		       type1->type, type1->instance);
+
+		if (type1->type == GSMI_LOG_ENTRY_TYPE_KERNEL) {
+			/* Special case for linux kernel shutdown reason */
+			elog_add_event_dword(ELOG_TYPE_OS_EVENT,
+					     type1->instance);
+		} else {
+			/* Add other events that may be used for testing */
+			elog_add_event_dword(type1->type, type1->instance);
+		}
+		ret = GSMI_RET_SUCCESS;
+		break;
+
+	case GSMI_CMD_CLEAR_EVENT_LOG:
+		/* Get paramter buffer even though we don't use it */
+		cel = (struct gsmi_clear_eventlog_param *)(*param);
+		if (!cel)
+			break;
+
+		printk(BIOS_DEBUG, "GSMI Clear Event Log (%u%% type=%u)\n",
+		       cel->percentage, cel->data_type);
+
+		if (elog_clear() == 0)
+			ret = GSMI_RET_SUCCESS;
+		break;
+
+	default:
+		printk(BIOS_DEBUG, "GSMI Unknown: 0x%02x\n", command);
+		break;
+	}
+
+	return ret;
+}