mirror of https://github.com/wolfSSL/wolfBoot.git
107 lines
3.2 KiB
C
107 lines
3.2 KiB
C
/* update_flash_hwswap.c
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*
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* Implementation for hardware assisted updater
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*
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*
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* Copyright (C) 2021 wolfSSL Inc.
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*
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* This file is part of wolfBoot.
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*
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* wolfBoot 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; either version 3 of the License, or
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* (at your option) any later version.
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*
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* wolfBoot 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 Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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#include "loader.h"
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#include "image.h"
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#include "hal.h"
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#include "spi_flash.h"
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#include "wolfboot/wolfboot.h"
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#ifdef SECURE_PKCS11
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int WP11_Library_Init(void);
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#endif
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extern void hal_flash_dualbank_swap(void);
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static inline void boot_panic(void)
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{
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while(1)
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;
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}
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void RAMFUNCTION wolfBoot_start(void)
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{
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int active;
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struct wolfBoot_image fw_image;
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uint8_t p_state;
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active = wolfBoot_dualboot_candidate();
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if (active < 0) /* panic if no images available */
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boot_panic();
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for (;;) {
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if ((wolfBoot_open_image(&fw_image, active) < 0) ||
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(wolfBoot_verify_integrity(&fw_image) < 0) ||
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(wolfBoot_verify_authenticity(&fw_image) < 0)) {
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/* panic if authentication fails and no backup */
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if (!wolfBoot_fallback_is_possible())
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boot_panic();
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else {
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/* Invalidate failing image and switch to the
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* other partition
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*/
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wolfBoot_erase_partition(active);
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active ^= 1;
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}
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} else
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break; /* candidate successfully authenticated */
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}
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/* First time we boot this update, set to TESTING to await
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* confirmation from the system
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*/
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if ((active == PART_BOOT) && (wolfBoot_get_partition_state(active, &p_state) == 0) &&
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(p_state == IMG_STATE_UPDATING))
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{
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hal_flash_unlock();
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wolfBoot_set_partition_state(active, IMG_STATE_TESTING);
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hal_flash_lock();
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}
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/* Booting from update is possible via HW-assisted swap */
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if (active == PART_UPDATE) {
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hal_flash_dualbank_swap();
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/* On some platform, e.g. STM32L5, hal_flash_dualbank_swap
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* never returns. A reboot is triggered instead, so the code
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* below is only executed if we are staging the firmware.
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*/
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active = PART_BOOT;
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if ((wolfBoot_get_partition_state(active, &p_state) == 0) &&
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(p_state == IMG_STATE_UPDATING))
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{
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hal_flash_unlock();
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wolfBoot_set_partition_state(active, IMG_STATE_TESTING);
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hal_flash_lock();
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}
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}
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#ifdef SECURE_PKCS11
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WP11_Library_Init();
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#endif
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#ifdef WOLFBOOT_ENABLE_WOLFHSM_CLIENT
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(void)hal_hsm_disconnect();
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#endif
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hal_prepare_boot();
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do_boot((void *)(WOLFBOOT_PARTITION_BOOT_ADDRESS + IMAGE_HEADER_SIZE));
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}
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