mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2026-01-08 16:41:55 +00:00
e72788ef96
Previously, all hook functions returned EC_SUCCESS, which was meaningless because nothing ever looked at the return value. Changing the return value to void saves ~100 bytes of code size and an equal amount of source code size. BUG=none BRANCH=none TEST=code still builds; link still boots Change-Id: I2a636339894e5a804831244967a9c9d134df7d13 Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/36372
137 lines
3.6 KiB
C
137 lines
3.6 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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* Main routine for Chrome EC
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*/
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#include "clock.h"
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#include "common.h"
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#include "cpu.h"
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#include "eeprom.h"
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#include "eoption.h"
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#include "flash.h"
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#include "gpio.h"
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#include "hooks.h"
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#include "jtag.h"
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#include "keyboard.h"
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#include "keyboard_scan.h"
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#include "system.h"
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#include "task.h"
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#include "timer.h"
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#include "uart.h"
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#include "watchdog.h"
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int main(void)
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{
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/*
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* Pre-initialization (pre-verified boot) stage. Initialization at
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* this level should do as little as possible, because verified boot
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* may need to jump to another image, which will repeat this
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* initialization. In particular, modules should NOT enable
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* interrupts.
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*/
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/* Configure the pin multiplexers and GPIOs */
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configure_board();
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jtag_pre_init();
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gpio_pre_init();
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#ifdef CONFIG_CONFIGURE_BOARD_LATE
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configure_board_late();
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#endif
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/*
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* Initialize interrupts, but don't enable any of them. Note that
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* task scheduling is not enabled until task_start() below.
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*/
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task_pre_init();
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/*
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* Initialize the system module. This enables the hibernate clock
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* source we need to calibrate the internal oscillator.
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*/
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system_pre_init();
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system_common_pre_init();
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#ifdef CONFIG_FLASH
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/*
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* Initialize flash and apply write protect if necessary. Requires
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* the reset flags calculated by system initialization.
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*/
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flash_pre_init();
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#endif
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/* Set the CPU clocks / PLLs. System is now running at full speed. */
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clock_init();
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/*
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* Initialize timer. Everything after this can be benchmarked.
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* get_time() and udelay() may now be used. usleep() requires task
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* scheduling, so cannot be used yet. Note that interrupts declared
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* via DECLARE_IRQ() call timer routines when profiling is enabled, so
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* timer init() must be before uart_init().
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*/
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timer_init();
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/* Main initialization stage. Modules may enable interrupts here. */
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cpu_init();
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/* Initialize UART. uart_printf(), etc. may now be used. */
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uart_init();
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if (system_jumped_to_this_image())
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uart_printf("[%T UART initialized after sysjump]\n");
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else {
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uart_puts("\n\n--- UART initialized after reboot ---\n");
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uart_puts("[Reset cause: ");
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system_print_reset_flags();
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uart_puts("]\n");
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}
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uart_printf("[Image: %s, %s]\n",
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system_get_image_copy_string(),
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system_get_build_info());
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#ifdef CONFIG_TASK_WATCHDOG
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/*
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* Intialize watchdog timer. All lengthy operations between now and
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* task_start() must periodically call watchdog_reload() to avoid
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* triggering a watchdog reboot. (This pretty much applies only to
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* verified boot, because all *other* lengthy operations should be done
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* by tasks.)
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*/
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watchdog_init();
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#endif
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/*
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* Verified boot needs to read the initial keyboard state and EEPROM
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* contents. EEPROM must be up first, so keyboard_scan can toggle
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* debugging settings via keys held at boot.
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*/
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#ifdef CONFIG_EEPROM
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eeprom_init();
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#endif
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#ifdef CONFIG_EOPTION
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eoption_init();
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#endif
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#ifdef CONFIG_TASK_KEYSCAN
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keyboard_scan_init();
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#endif
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/*
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* Initialize other driver modules. These can occur in any order.
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* Non-driver modules with tasks do their inits from their task
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* functions, not here.
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*/
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hook_notify(HOOK_INIT);
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/*
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* Print the init time. Not completely accurate because it can't take
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* into account the time before timer_init(), but it'll at least catch
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* the majority of the time.
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*/
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uart_printf("[%T Inits done]\n");
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/* Launch task scheduling (never returns) */
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return task_start();
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}
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