| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2017 Google Inc. |
| * |
| * 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. |
| */ |
| |
| #include <bootstate.h> |
| #include <console/console.h> |
| #include <ec/google/chromeec/ec.h> |
| #include <elog.h> |
| #include <halt.h> |
| #include <tpm_lite/tlcl.h> |
| #include <vb2_api.h> |
| #include <security/vboot/vboot_common.h> |
| |
| static void enable_update(void *unused) |
| { |
| int ret; |
| uint8_t num_restored_headers; |
| |
| /* Nothing to do on recovery mode. */ |
| if (vboot_recovery_mode_enabled()) |
| return; |
| |
| ret = tlcl_lib_init(); |
| |
| if (ret != VB2_SUCCESS) { |
| printk(BIOS_ERR, "tlcl_lib_init() failed for CR50 update: %x\n", |
| ret); |
| return; |
| } |
| |
| /* Reboot in 1000 ms if necessary. */ |
| ret = tlcl_cr50_enable_update(1000, &num_restored_headers); |
| |
| if (ret != TPM_SUCCESS) { |
| printk(BIOS_ERR, "Attempt to enable CR50 update failed: %x\n", |
| ret); |
| return; |
| } |
| |
| /* If no headers were restored there is no reset forthcoming. */ |
| if (!num_restored_headers) |
| return; |
| |
| elog_add_event(ELOG_TYPE_CR50_UPDATE); |
| |
| /* clear current post code avoid chatty eventlog on subsequent boot*/ |
| post_code(0); |
| |
| printk(BIOS_INFO, "Waiting for CR50 reset to pick up update.\n"); |
| |
| if (IS_ENABLED(CONFIG_POWER_OFF_ON_CR50_UPDATE)) { |
| if (IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC)) |
| printk(BIOS_INFO, "Hibernating EC.\n"); |
| google_chromeec_reboot(0, EC_REBOOT_HIBERNATE, |
| EC_REBOOT_FLAG_ON_AP_SHUTDOWN); |
| poweroff(); |
| } |
| halt(); |
| } |
| BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_ENTRY, enable_update, NULL); |
| |