5688979fbd
Change-Id: Ib0d98e3ab5b2943c36f88765587e8963a4f49604 Signed-off-by: Martin Roth <martin.roth@se-eng.com> Reviewed-on: http://review.coreboot.org/3754 Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2012 The ChromiumOS Authors. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
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*/
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#include <arch/io.h>
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#include <console/console.h>
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#include <cpu/x86/smm.h>
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#include <elog.h>
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#define GSMI_RET_SUCCESS 0x00
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#define GSMI_RET_INVALID_PARAMETER 0x82
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#define GSMI_RET_UNSUPPORTED 0x83
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#define GSMI_CMD_SET_EVENT_LOG 0x08
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#define GSMI_CMD_CLEAR_EVENT_LOG 0x09
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#define GSMI_CMD_HANDSHAKE_TYPE 0xc1
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#define GSMI_HANDSHAKE_NONE 0x7f
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#define GSMI_LOG_ENTRY_TYPE_KERNEL 0xDEAD
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struct gsmi_set_eventlog_param {
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u32 data_ptr;
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u32 data_len;
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u32 type;
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} __attribute__ ((packed));
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struct gsmi_set_eventlog_type1 {
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u16 type;
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u32 instance;
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} __attribute__ ((packed));
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struct gsmi_clear_eventlog_param {
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u32 percentage;
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u32 data_type;
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} __attribute__ ((packed));
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/* Param is usually EBX, ret in EAX */
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u32 gsmi_exec(u8 command, u32 *param)
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{
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struct gsmi_set_eventlog_param *sel;
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struct gsmi_set_eventlog_type1 *type1;
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struct gsmi_clear_eventlog_param *cel;
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u32 ret = GSMI_RET_UNSUPPORTED;
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switch (command) {
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case GSMI_CMD_HANDSHAKE_TYPE:
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/* Used by kernel to verify basic SMI functionality */
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printk(BIOS_DEBUG, "GSMI Handshake\n");
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ret = GSMI_HANDSHAKE_NONE;
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break;
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case GSMI_CMD_SET_EVENT_LOG:
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/* Look for a type1 event */
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sel = (struct gsmi_set_eventlog_param *)(*param);
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if (!sel)
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break;
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/* Make sure the input is usable */
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if (sel->type != 1 && sel->data_ptr != 0 &&
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sel->data_len != sizeof(struct gsmi_set_eventlog_type1))
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break;
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/* Event structure within the data buffer */
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type1 = (struct gsmi_set_eventlog_type1 *)(sel->data_ptr);
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if (!type1)
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break;
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printk(BIOS_DEBUG, "GSMI Set Event Log "
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"(type=0x%x instance=0x%x)\n",
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type1->type, type1->instance);
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if (type1->type == GSMI_LOG_ENTRY_TYPE_KERNEL) {
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/* Special case for linux kernel shutdown reason */
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elog_add_event_dword(ELOG_TYPE_OS_EVENT,
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type1->instance);
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} else {
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/* Add other events that may be used for testing */
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elog_add_event_dword(type1->type, type1->instance);
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}
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ret = GSMI_RET_SUCCESS;
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break;
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case GSMI_CMD_CLEAR_EVENT_LOG:
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/* Get parameter buffer even though we don't use it */
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cel = (struct gsmi_clear_eventlog_param *)(*param);
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if (!cel)
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break;
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printk(BIOS_DEBUG, "GSMI Clear Event Log (%u%% type=%u)\n",
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cel->percentage, cel->data_type);
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if (elog_clear() == 0)
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ret = GSMI_RET_SUCCESS;
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break;
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default:
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printk(BIOS_DEBUG, "GSMI Unknown: 0x%02x\n", command);
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break;
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}
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return ret;
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}
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