mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2025-12-30 18:41:11 +00:00
a61d8db3d3
Signed-off-by: Randall Spangler <rspangler@chromium.org> BUG=chrome-os-partner:7461 TEST=manual make BOARD={bds,link,daisy} make tests flash link system and make sure it boots Change-Id: I1241a1895c083e387e38ddab01ac346ca4474eb9
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
/* Verified boot module for Chrome EC */
|
|
|
|
#include "gpio.h"
|
|
#include "keyboard_scan.h"
|
|
#include "system.h"
|
|
#include "uart.h"
|
|
#include "util.h"
|
|
#include "vboot.h"
|
|
|
|
|
|
/* Jumps to one of the RW images if necessary. */
|
|
static void jump_to_other_image(void)
|
|
{
|
|
/* Only jump to another image if we're currently in RO */
|
|
if (system_get_image_copy() != SYSTEM_IMAGE_RO)
|
|
return;
|
|
|
|
#ifdef CONFIG_TASK_KEYSCAN
|
|
/* Don't jump if recovery requested */
|
|
if (keyboard_scan_recovery_pressed()) {
|
|
uart_puts("Vboot staying in RO because key pressed.\n");
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
/* Don't jump if we're in RO becuase we jumped there (this keeps us
|
|
* from jumping to RO only to jump right back). */
|
|
if (system_jumped_to_this_image())
|
|
return;
|
|
|
|
#if !defined(BOARD_daisy) && !defined(BOARD_discovery) && !defined(BOARD_adv)
|
|
/* TODO: (crosbug.com/p/8572) Daisy and discovery don't define a GPIO
|
|
* for the recovery signal from servo, so can't check it. */
|
|
if (gpio_get_level(GPIO_RECOVERYn) == 0) {
|
|
uart_puts("Vboot staying in RO due to recovery signal.\n");
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifdef BOARD_link
|
|
/* TODO: (crosbug.com/p/8561) once daisy can warm-boot to another
|
|
* image, enable this there too. */
|
|
/* TODO: real verified boot (including recovery reason); for now, just
|
|
* jump to image A. */
|
|
system_run_image_copy(SYSTEM_IMAGE_RW_A);
|
|
#endif
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* Initialization */
|
|
|
|
int vboot_pre_init(void)
|
|
{
|
|
/* FIXME(wfrichar): crosbug.com/p/7453: should protect flash */
|
|
return EC_SUCCESS;
|
|
}
|
|
|
|
|
|
int vboot_init(void)
|
|
{
|
|
/* FIXME(wfrichar): placeholder for full verified boot implementation.
|
|
* TBD exactly how, but we may want to continue in RO firmware, jump
|
|
* directly to one of the RW firmwares, etc. */
|
|
jump_to_other_image();
|
|
return EC_SUCCESS;
|
|
}
|