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/* Copyright 2013 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.
*
* Main routine for Chrome EC
*/
#include "board_config.h"
#include "button.h"
#include "chipset.h"
#include "clock.h"
#include "common.h"
#include "console.h"
#include "cpu.h"
#include "dma.h"
#include "eeprom.h"
#include "flash.h"
#include "gpio.h"
#include "hooks.h"
#include "keyboard_scan.h"
#include "link_defs.h"
#include "lpc.h"
#ifdef CONFIG_MPU
#include "mpu.h"
#endif
#include "rwsig.h"
#include "system.h"
#include "task.h"
#include "timer.h"
#include "uart.h"
#include "util.h"
#include "vboot.h"
#include "watchdog.h"
/* Console output macros */
#define CPUTS(outstr) cputs(CC_SYSTEM, outstr)
#define CPRINTF(format, args...) cprintf(CC_SYSTEM, format, ## args)
#define CPRINTS(format, args...) cprints(CC_SYSTEM, format, ## args)
test_mockable __keep int main(void)
{
/*
* Pre-initialization (pre-verified boot) stage. Initialization at
* this level should do as little as possible, because verified boot
* may need to jump to another image, which will repeat this
* initialization. In particular, modules should NOT enable
* interrupts.
*/
#ifdef CONFIG_BOARD_PRE_INIT
board_config_pre_init();
#endif
#ifdef CONFIG_CHIP_PRE_INIT
chip_pre_init();
#endif
#ifdef CONFIG_MPU
mpu_pre_init();
#endif
gpio_pre_init();
#ifdef CONFIG_BOARD_POST_GPIO_INIT
board_config_post_gpio_init();
#endif
/*
* Initialize interrupts, but don't enable any of them. Note that
* task scheduling is not enabled until task_start() below.
*/
task_pre_init();
/*
* Initialize the system module. This enables the hibernate clock
* source we need to calibrate the internal oscillator.
*/
system_pre_init();
system_common_pre_init();
#ifdef CONFIG_DRAM_BASE
/* Now that DRAM is initialized, clear up DRAM .bss, copy .data over. */
memset(&__dram_bss_start, 0,
(uintptr_t)(&__dram_bss_end) - (uintptr_t)(&__dram_bss_start));
memcpy(&__dram_data_start, &__dram_data_lma_start,
(uintptr_t)(&__dram_data_end) - (uintptr_t)(&__dram_data_start));
#endif
#if defined(CONFIG_FLASH_PHYSICAL)
/*
* Initialize flash and apply write protect if necessary. Requires
* the reset flags calculated by system initialization.
*/
flash_pre_init();
#endif
/* Set the CPU clocks / PLLs. System is now running at full speed. */
clock_init();
/*
* Initialize timer. Everything after this can be benchmarked.
* get_time() and udelay() may now be used. usleep() requires task
* scheduling, so cannot be used yet. Note that interrupts declared
* via DECLARE_IRQ() call timer routines when profiling is enabled, so
* timer init() must be before uart_init().
*/
timer_init();
/* Main initialization stage. Modules may enable interrupts here. */
cpu_init();
#ifdef CONFIG_DMA
/* Initialize DMA. Must be before UART. */
dma_init();
#endif
/* Initialize UART. Console output functions may now be used. */
uart_init();
/* be less verbose if we boot for USB resume to meet spec timings */
if (!(system_get_reset_flags() & RESET_FLAG_USB_RESUME)) {
if (system_jumped_to_this_image()) {
CPRINTS("UART initialized after sysjump");
} else {
CPUTS("\n\n--- UART initialized after reboot ---\n");
CPUTS("[Reset cause: ");
system_print_reset_flags();
CPUTS("]\n");
}
CPRINTF("[Image: %s, %s]\n",
system_get_image_copy_string(),
system_get_build_info());
}
#ifdef CONFIG_BRINGUP
ccprintf("\n\nWARNING: BRINGUP BUILD\n\n\n");
#endif
#ifdef CONFIG_WATCHDOG
/*
* Initialize watchdog timer. All lengthy operations between now and
* task_start() must periodically call watchdog_reload() to avoid
* triggering a watchdog reboot. (This pretty much applies only to
* verified boot, because all *other* lengthy operations should be done
* by tasks.)
*/
watchdog_init();
#endif
/*
* Verified boot needs to read the initial keyboard state and EEPROM
* contents. EEPROM must be up first, so keyboard_scan can toggle
* debugging settings via keys held at boot.
*/
#ifdef CONFIG_EEPROM
eeprom_init();
#endif
/*
* Keyboard scan init/Button init can set recovery events to
* indicate to host entry into recovery mode. Before this is
* done, lpc always report mask needs to be initialized
* correctly.
*/
#ifdef CONFIG_HOSTCMD_X86
lpc_init_mask();
#endif
#ifdef HAS_TASK_KEYSCAN
keyboard_scan_init();
#endif
#if defined(CONFIG_DEDICATED_RECOVERY_BUTTON) || defined(CONFIG_VOLUME_BUTTONS)
button_init();
#endif /* defined(CONFIG_DEDICATED_RECOVERY_BUTTON | CONFIG_VOLUME_BUTTONS) */
#if defined(CONFIG_VBOOT_EFS)
/*
* Execute PMIC reset in case we're here after watchdog reset to unwedge
* AP. This has to be done here because vboot_main may jump to RW.
*/
chipset_handle_reboot();
/*
* For RO, it behaves as follows:
* In recovery, it enables PD communication and returns.
* In normal boot, it verifies and jumps to RW.
* For RW, it returns immediately.
*/
vboot_main();
#elif defined(CONFIG_RWSIG) && !defined(HAS_TASK_RWSIG)
/*
* Check the RW firmware signature and jump to it if it is good.
*
* Only the Read-Only firmware needs to do the signature check.
*/
if (system_get_image_copy() == SYSTEM_IMAGE_RO) {
#if defined(CONFIG_RWSIG_DONT_CHECK_ON_PIN_RESET)
/*
* If system was reset by reset-pin, do not jump and wait for
* command from host
*/
if (system_get_reset_flags() == RESET_FLAG_RESET_PIN) {
CPRINTS("Hard pin-reset detected, disable RW jump");
} else
#endif
{
if (rwsig_check_signature())
rwsig_jump_now();
}
}
#endif /* !CONFIG_VBOOT_EFS && CONFIG_RWSIG && !HAS_TASK_RWSIG */
/*
* Print the init time. Not completely accurate because it can't take
* into account the time before timer_init(), but it'll at least catch
* the majority of the time.
*/
CPRINTS("Inits done");
/* Launch task scheduling (never returns) */
return task_start();
}
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