mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2026-01-07 16:11:43 +00:00
4c8fa572b5
Mostly stolen from Daisy. Notable differences: - No SYSCFGEN required for external interrupts ? - No GPIO H bank on STM32F100, OSC_IN and OSC_OUT are not available --> CODEC_INT and ENTERING_RW signals are missing BUG=None TEST=Tested on ADV2/Snow, able to see EC serialconsole Signed-off-by: David Hendricks <dhendrix@chromium.org> Change-Id: I955e2ff180d064294d67b630ae2ee6cfcfe52ab9
95 lines
2.7 KiB
C
95 lines
2.7 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 "console.h"
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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 "util.h"
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#include "vboot.h"
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/* Console output macros */
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#define CPUTS(outstr) cputs(CC_VBOOT, outstr)
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#define CPRINTF(format, args...) cprintf(CC_VBOOT, format, ## args)
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/* Might I want to jump to one of the RW images? */
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static int maybe_jump_to_other_image(void)
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{
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/* Not all boards even have RW EC firmware. I think it's just Link at
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* the moment. */
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#ifndef BOARD_link
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/* TODO: (crosbug.com/p/8561) once daisy can warm-boot to another
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* image, enable it here too. */
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CPUTS("[Vboot staying in RO because that's all there is]\n");
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return 0;
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#endif
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/* We'll 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 0;
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#ifdef CONFIG_TASK_KEYSCAN
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/* Don't jump if recovery requested */
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if (keyboard_scan_recovery_pressed()) {
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CPUTS("[Vboot staying in RO because recovery key pressed]\n");
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return 0;
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}
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#endif
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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 0;
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#if !defined(CHIP_stm32)
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/* TODO: (crosbug.com/p/8572) Daisy and Snow 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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CPUTS("[Vboot staying in RO due to recovery signal]\n");
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return 0;
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}
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#endif
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/* Okay, we might want to jump to a RW image. */
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return 1;
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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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/* nothing to do, so do nothing */
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if (!maybe_jump_to_other_image())
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return EC_SUCCESS;
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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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CPRINTF("[ROOT_KEY is at 0x%x, size 0x%x]\n",
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CONFIG_VBOOT_ROOTKEY_OFF, CONFIG_VBOOT_ROOTKEY_SIZE);
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CPRINTF("[FW_MAIN_A is at 0x%x, size 0x%x]\n",
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CONFIG_FW_A_OFF, CONFIG_FW_A_SIZE);
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CPRINTF("[VBLOCK_A is at 0x%x, size 0x%x]\n",
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CONFIG_VBLOCK_A_OFF, CONFIG_VBLOCK_A_SIZE);
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CPRINTF("[FW_MAIN_B is at 0x%x, size 0x%x]\n",
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CONFIG_FW_B_OFF, CONFIG_FW_B_SIZE);
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CPRINTF("[VBLOCK_B is at 0x%x, size 0x%x]\n",
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CONFIG_VBLOCK_B_OFF, CONFIG_VBLOCK_B_SIZE);
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system_run_image_copy(SYSTEM_IMAGE_RW_A, 0);
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return EC_SUCCESS;
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}
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