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
|
/* Copyright 2021-2023 QMK
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "bootloader.h"
#include "util.h"
#include <ch.h>
#include <hal.h>
#include "wait.h"
#ifndef STM32_BOOTLOADER_RAM_SYMBOL
# define STM32_BOOTLOADER_RAM_SYMBOL __ram0_end__
#endif
extern uint32_t STM32_BOOTLOADER_RAM_SYMBOL;
#ifndef STM32_BOOTLOADER_DUAL_BANK
# define STM32_BOOTLOADER_DUAL_BANK FALSE
#endif
#if STM32_BOOTLOADER_DUAL_BANK
# include "gpio.h"
# ifndef STM32_BOOTLOADER_DUAL_BANK_GPIO
# error "No STM32_BOOTLOADER_DUAL_BANK_GPIO defined, don't know which pin to toggle"
# endif
# ifndef STM32_BOOTLOADER_DUAL_BANK_POLARITY
# define STM32_BOOTLOADER_DUAL_BANK_POLARITY 0
# endif
# ifndef STM32_BOOTLOADER_DUAL_BANK_DELAY
# define STM32_BOOTLOADER_DUAL_BANK_DELAY 100
# endif
__attribute__((weak)) void bootloader_jump(void) {
// For STM32 MCUs with dual-bank flash, and we're incapable of jumping to the bootloader. The first valid flash
// bank is executed unconditionally after a reset, so it doesn't enter DFU unless BOOT0 is high. Instead, we do
// it with hardware...in this case, we pull a GPIO high/low depending on the configuration, connects 3.3V to
// BOOT0's RC charging circuit, lets it charge the capacitor, and issue a system reset. See the QMK discord
// #hardware channel pins for an example circuit.
palSetPadMode(PAL_PORT(STM32_BOOTLOADER_DUAL_BANK_GPIO), PAL_PAD(STM32_BOOTLOADER_DUAL_BANK_GPIO), PAL_MODE_OUTPUT_PUSHPULL);
# if STM32_BOOTLOADER_DUAL_BANK_POLARITY
palSetPad(PAL_PORT(STM32_BOOTLOADER_DUAL_BANK_GPIO), PAL_PAD(STM32_BOOTLOADER_DUAL_BANK_GPIO));
# else
palClearPad(PAL_PORT(STM32_BOOTLOADER_DUAL_BANK_GPIO), PAL_PAD(STM32_BOOTLOADER_DUAL_BANK_GPIO));
# endif
// Wait for a while for the capacitor to charge
wait_ms(STM32_BOOTLOADER_DUAL_BANK_DELAY);
// Issue a system reset to get the ROM bootloader to execute, with BOOT0 high
NVIC_SystemReset();
}
__attribute__((weak)) void mcu_reset(void) {
NVIC_SystemReset();
}
// not needed at all, but if anybody attempts to invoke it....
void enter_bootloader_mode_if_requested(void) {}
#else
/* This code should be checked whether it runs correctly on platforms */
# define SYMVAL(sym) (uint32_t)(((uint8_t *)&(sym)) - ((uint8_t *)0))
# define BOOTLOADER_MAGIC 0xDEADBEEF
# define MAGIC_ADDR (unsigned long *)(SYMVAL(STM32_BOOTLOADER_RAM_SYMBOL) - 4)
__attribute__((weak)) void bootloader_marker_enable(void) {
uint32_t *marker = (uint32_t *)MAGIC_ADDR;
*marker = BOOTLOADER_MAGIC; // set magic flag => reset handler will jump into boot loader
}
__attribute__((weak)) bool bootloader_marker_active(void) {
const uint32_t *marker = (const uint32_t *)MAGIC_ADDR;
return (*marker == BOOTLOADER_MAGIC) ? true : false;
}
__attribute__((weak)) void bootloader_marker_disable(void) {
uint32_t *marker = (uint32_t *)MAGIC_ADDR;
*marker = 0;
}
__attribute__((weak)) void bootloader_jump(void) {
bootloader_marker_enable();
NVIC_SystemReset();
}
__attribute__((weak)) void mcu_reset(void) {
NVIC_SystemReset();
}
void enter_bootloader_mode_if_requested(void) {
if (bootloader_marker_active()) {
bootloader_marker_disable();
__disable_irq();
# if defined(QMK_MCU_ARCH_CORTEX_M7)
SCB_DisableDCache();
SCB_DisableICache();
# endif
# if defined(__MPU_PRESENT) && (__MPU_PRESENT == 1U)
ARM_MPU_Disable();
# endif
SysTick->CTRL = 0;
SysTick->VAL = 0;
SysTick->LOAD = 0;
// Clear interrupt enable and interrupt pending registers
for (int i = 0; i < ARRAY_SIZE(NVIC->ICER); i++) {
NVIC->ICER[i] = 0xFFFFFFFF;
NVIC->ICPR[i] = 0xFFFFFFFF;
}
__enable_irq();
struct system_memory_vector_t {
uint32_t stack_top;
void (*entrypoint)(void);
};
const struct system_memory_vector_t *bootloader = (const struct system_memory_vector_t *)(STM32_BOOTLOADER_ADDRESS);
// Jump to bootloader
__set_MSP(bootloader->stack_top);
bootloader->entrypoint();
while (true) {
}
}
}
#endif
|
