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Diffstat (limited to 'src/drivers/elog/gsmi.c')
-rw-r--r--src/drivers/elog/gsmi.c117
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;
+}