3cff98a0e2
Change-Id: Ic8e04ae043145a3633c0b8379a797724f95fd7ea Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/65880 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
125 lines
3.0 KiB
C
125 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <console/console.h>
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#include <elog.h>
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#include <stdint.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_LOG_S0IX_SUSPEND 0x0a
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#define GSMI_CMD_LOG_S0IX_RESUME 0x0b
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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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} __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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} __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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} __packed;
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void __weak elog_gsmi_cb_platform_log_wake_source(void)
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{
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/* Default weak implementation, does nothing. */
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}
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void __weak elog_gsmi_cb_mainboard_log_wake_source(void)
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{
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/* Default weak implementation, does nothing. */
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}
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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 *)(uintptr_t)(*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 *)(uintptr_t)(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 *)(uintptr_t)(*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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case GSMI_CMD_LOG_S0IX_SUSPEND:
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case GSMI_CMD_LOG_S0IX_RESUME:
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ret = GSMI_RET_SUCCESS;
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if (command == GSMI_CMD_LOG_S0IX_SUSPEND)
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elog_add_event(ELOG_TYPE_S0IX_ENTER);
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else {
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elog_add_event(ELOG_TYPE_S0IX_EXIT);
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elog_gsmi_cb_platform_log_wake_source();
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elog_gsmi_cb_mainboard_log_wake_source();
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}
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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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