Duncan Laurie | 79bbbd9 | 2012-06-23 16:48:38 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2012 The ChromiumOS Authors. All rights reserved. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
Duncan Laurie | 79bbbd9 | 2012-06-23 16:48:38 -0700 | [diff] [blame] | 14 | */ |
| 15 | |
| 16 | #include <arch/io.h> |
| 17 | #include <console/console.h> |
| 18 | #include <cpu/x86/smm.h> |
| 19 | #include <elog.h> |
| 20 | |
| 21 | #define GSMI_RET_SUCCESS 0x00 |
| 22 | #define GSMI_RET_INVALID_PARAMETER 0x82 |
| 23 | #define GSMI_RET_UNSUPPORTED 0x83 |
| 24 | |
| 25 | #define GSMI_CMD_SET_EVENT_LOG 0x08 |
| 26 | #define GSMI_CMD_CLEAR_EVENT_LOG 0x09 |
| 27 | #define GSMI_CMD_HANDSHAKE_TYPE 0xc1 |
| 28 | |
| 29 | #define GSMI_HANDSHAKE_NONE 0x7f |
| 30 | #define GSMI_LOG_ENTRY_TYPE_KERNEL 0xDEAD |
| 31 | |
| 32 | struct gsmi_set_eventlog_param { |
| 33 | u32 data_ptr; |
| 34 | u32 data_len; |
| 35 | u32 type; |
| 36 | } __attribute__ ((packed)); |
| 37 | |
| 38 | struct gsmi_set_eventlog_type1 { |
| 39 | u16 type; |
| 40 | u32 instance; |
| 41 | } __attribute__ ((packed)); |
| 42 | |
| 43 | struct gsmi_clear_eventlog_param { |
| 44 | u32 percentage; |
| 45 | u32 data_type; |
| 46 | } __attribute__ ((packed)); |
| 47 | |
| 48 | /* Param is usually EBX, ret in EAX */ |
| 49 | u32 gsmi_exec(u8 command, u32 *param) |
| 50 | { |
| 51 | struct gsmi_set_eventlog_param *sel; |
| 52 | struct gsmi_set_eventlog_type1 *type1; |
| 53 | struct gsmi_clear_eventlog_param *cel; |
| 54 | u32 ret = GSMI_RET_UNSUPPORTED; |
| 55 | |
| 56 | switch (command) { |
| 57 | case GSMI_CMD_HANDSHAKE_TYPE: |
| 58 | /* Used by kernel to verify basic SMI functionality */ |
| 59 | printk(BIOS_DEBUG, "GSMI Handshake\n"); |
| 60 | ret = GSMI_HANDSHAKE_NONE; |
| 61 | break; |
| 62 | |
| 63 | case GSMI_CMD_SET_EVENT_LOG: |
| 64 | /* Look for a type1 event */ |
| 65 | sel = (struct gsmi_set_eventlog_param *)(*param); |
| 66 | if (!sel) |
| 67 | break; |
| 68 | |
| 69 | /* Make sure the input is usable */ |
| 70 | if (sel->type != 1 && sel->data_ptr != 0 && |
| 71 | sel->data_len != sizeof(struct gsmi_set_eventlog_type1)) |
| 72 | break; |
| 73 | |
| 74 | /* Event structure within the data buffer */ |
| 75 | type1 = (struct gsmi_set_eventlog_type1 *)(sel->data_ptr); |
| 76 | if (!type1) |
| 77 | break; |
| 78 | |
| 79 | printk(BIOS_DEBUG, "GSMI Set Event Log " |
| 80 | "(type=0x%x instance=0x%x)\n", |
| 81 | type1->type, type1->instance); |
| 82 | |
| 83 | if (type1->type == GSMI_LOG_ENTRY_TYPE_KERNEL) { |
| 84 | /* Special case for linux kernel shutdown reason */ |
| 85 | elog_add_event_dword(ELOG_TYPE_OS_EVENT, |
| 86 | type1->instance); |
| 87 | } else { |
| 88 | /* Add other events that may be used for testing */ |
| 89 | elog_add_event_dword(type1->type, type1->instance); |
| 90 | } |
| 91 | ret = GSMI_RET_SUCCESS; |
| 92 | break; |
| 93 | |
| 94 | case GSMI_CMD_CLEAR_EVENT_LOG: |
Martin Roth | 5688979 | 2013-07-09 21:39:46 -0600 | [diff] [blame] | 95 | /* Get parameter buffer even though we don't use it */ |
Duncan Laurie | 79bbbd9 | 2012-06-23 16:48:38 -0700 | [diff] [blame] | 96 | cel = (struct gsmi_clear_eventlog_param *)(*param); |
| 97 | if (!cel) |
| 98 | break; |
| 99 | |
| 100 | printk(BIOS_DEBUG, "GSMI Clear Event Log (%u%% type=%u)\n", |
| 101 | cel->percentage, cel->data_type); |
| 102 | |
| 103 | if (elog_clear() == 0) |
| 104 | ret = GSMI_RET_SUCCESS; |
| 105 | break; |
| 106 | |
| 107 | default: |
| 108 | printk(BIOS_DEBUG, "GSMI Unknown: 0x%02x\n", command); |
| 109 | break; |
| 110 | } |
| 111 | |
| 112 | return ret; |
| 113 | } |