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ed33516e2e
BUG=chrome-os-partner:8718 TEST=manual 1) Use 'reboot' command from console to boot image. Should end up in image A, with last reset reason soft cold. 'sysinfo' should show we jumped to this image. 2) sysjump RO. Should end up in RO; otherwise same as 1) 3) reboot using Power+Esc+Reload. Should end up in image RO, with last reset reason reset pin. 'sysinfo' should show we did not jump to this image. 4) sysjump A. Should end up in A with reset reason reset pin. 'sysinfo' should show we jumped here. Change-Id: I2dd5595eab4ba2c91bfe8b2b2e9677d7732aca63 Signed-off-by: Randall Spangler <rspangler@chromium.org>
71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Verified boot module for Chrome EC */
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#include "gpio.h"
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#include "keyboard_scan.h"
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#include "system.h"
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#include "uart.h"
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#include "util.h"
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#include "vboot.h"
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/* Jumps to one of the RW images if necessary. */
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static void jump_to_other_image(void)
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{
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/* Only jump to another image if we're currently in RO */
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if (system_get_image_copy() != SYSTEM_IMAGE_RO)
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return;
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/* Don't jump if recovery requested */
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if (keyboard_scan_recovery_pressed()) {
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uart_puts("Vboot staying in RO because key pressed.\n");
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return;
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}
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/* Don't jump if we're in RO becuase we jumped there (this keeps us
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* from jumping to RO only to jump right back). */
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if (system_jumped_to_this_image())
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return;
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#if !defined(BOARD_daisy) && !defined(BOARD_discovery)
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/* TODO: (crosbug.com/p/8572) Daisy and discovery don't define a GPIO
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* for the recovery signal from servo, so can't check it. */
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if (gpio_get_level(GPIO_RECOVERYn) == 0) {
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uart_puts("Vboot staying in RO due to recovery signal.\n");
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return;
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}
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#endif
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#ifdef BOARD_link
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/* TODO: (crosbug.com/p/8561) once daisy can warm-boot to another
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* image, enable this there too. */
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/* TODO: real verified boot (including recovery reason); for now, just
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* jump to image A. */
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system_run_image_copy(SYSTEM_IMAGE_RW_A);
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#endif
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}
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/*****************************************************************************/
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/* Initialization */
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int vboot_pre_init(void)
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{
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/* FIXME(wfrichar): crosbug.com/p/7453: should protect flash */
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return EC_SUCCESS;
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}
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int vboot_init(void)
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{
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/* FIXME(wfrichar): placeholder for full verified boot implementation.
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* TBD exactly how, but we may want to continue in RO firmware, jump
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* directly to one of the RW firmwares, etc. */
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jump_to_other_image();
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return EC_SUCCESS;
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}
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