1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
/* Copyright (c) 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 "clock.h"
#include "common.h"
#include "console.h"
#include "cpu.h"
#include "dma.h"
#include "eeprom.h"
#include "eoption.h"
#include "flash.h"
#include "gpio.h"
#include "hooks.h"
#include "jtag.h"
#include "keyboard_scan.h"
#ifdef CONFIG_MPU
#include "mpu.h"
#endif
#include "rsa.h"
#include "system.h"
#include "task.h"
#include "timer.h"
#include "uart.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 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_MPU
mpu_pre_init();
#endif
/* Configure the pin multiplexers and GPIOs */
jtag_pre_init();
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_FLASH
/*
* Initialize flash and apply write protect if necessary. Requires
* the reset flags calculated by system initialization.
*/
flash_pre_init();
#endif
#if defined(CONFIG_CASE_CLOSED_DEBUG)
/*
* If the device is locked we assert PD_NO_DEBUG, preventing the EC
* from interfering with the AP's access to the SPI flash.
* The PD_NO_DEBUG signal is latched in hardware, so changing this
* GPIO later has no effect.
*/
gpio_set_level(GPIO_PD_DISABLE_DEBUG, system_is_locked());
#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();
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
/*
* Intialize 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
#ifdef CONFIG_EOPTION
eoption_init();
#endif
#ifdef HAS_TASK_KEYSCAN
keyboard_scan_init();
#endif
#ifdef CONFIG_RWSIG
/*
* Check the RW firmware signature
* and eventually jump to it if it is good.
*/
check_rw_signature();
#endif
/* Initialize the hook library. This calls HOOK_INIT hooks. */
hook_init();
/*
* 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();
}
|
