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524 lines
15 KiB
524 lines
15 KiB
/* |
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* sys-stm32f103.c - system routines for the initial page for STM32F103. |
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* |
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* Copyright (C) 2013, 2014, 2015, 2016, 2017, 2018 |
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* Flying Stone Technology |
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* Author: NIIBE Yutaka <[email protected]> |
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* |
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* Copying and distribution of this file, with or without modification, |
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* are permitted in any medium without royalty provided the copyright |
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* notice and this notice are preserved. This file is offered as-is, |
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* without any warranty. |
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* |
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* When the flash ROM is protected, we cannot modify the initial page. |
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* We put some system routines (which is useful for any program) here. |
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*/ |
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|
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#include <stdint.h> |
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#include <stdlib.h> |
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#include "board.h" |
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|
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#include "mcu/clk_gpio_init-stm32.c" |
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|
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|
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static void |
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usb_cable_config (int enable) |
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{ |
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#if defined(GPIO_USB_SET_TO_ENABLE) |
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if (enable) |
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GPIO_USB->BSRR = (1 << GPIO_USB_SET_TO_ENABLE); |
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else |
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GPIO_USB->BRR = (1 << GPIO_USB_SET_TO_ENABLE); |
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#elif defined(GPIO_USB_CLEAR_TO_ENABLE) |
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if (enable) |
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GPIO_USB->BRR = (1 << GPIO_USB_CLEAR_TO_ENABLE); |
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else |
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GPIO_USB->BSRR = (1 << GPIO_USB_CLEAR_TO_ENABLE); |
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#else |
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(void)enable; |
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#endif |
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} |
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|
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void |
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set_led (int on) |
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{ |
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#if defined(GPIO_LED_CLEAR_TO_EMIT) |
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if (on) |
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GPIO_LED->BRR = (1 << GPIO_LED_CLEAR_TO_EMIT); |
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else |
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GPIO_LED->BSRR = (1 << GPIO_LED_CLEAR_TO_EMIT); |
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#else |
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if (on) |
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GPIO_LED->BSRR = (1 << GPIO_LED_SET_TO_EMIT); |
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else |
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GPIO_LED->BRR = (1 << GPIO_LED_SET_TO_EMIT); |
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#endif |
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} |
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|
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static void wait (int count) |
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{ |
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int i; |
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|
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for (i = 0; i < count; i++) |
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asm volatile ("" : : "r" (i) : "memory"); |
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} |
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|
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|
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static void |
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usb_lld_sys_shutdown (void) |
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{ |
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RCC->APB1ENR &= ~RCC_APB1ENR_USBEN; |
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RCC->APB1RSTR = RCC_APB1RSTR_USBRST; |
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usb_cable_config (0); |
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} |
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|
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static void |
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usb_lld_sys_init (void) |
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{ |
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if ((RCC->APB1ENR & RCC_APB1ENR_USBEN) |
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&& (RCC->APB1RSTR & RCC_APB1RSTR_USBRST) == 0) |
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/* Make sure the device is disconnected, even after core reset. */ |
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{ |
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usb_lld_sys_shutdown (); |
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/* Disconnect requires SE0 (>= 2.5uS). */ |
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wait (5*MHZ); |
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} |
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|
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usb_cable_config (1); |
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RCC->APB1ENR |= RCC_APB1ENR_USBEN; |
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RCC->APB1RSTR = RCC_APB1RSTR_USBRST; |
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RCC->APB1RSTR = 0; |
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} |
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|
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#define FLASH_KEY1 0x45670123UL |
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#define FLASH_KEY2 0xCDEF89ABUL |
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|
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enum flash_status |
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{ |
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FLASH_BUSY = 1, |
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FLASH_ERROR_PG, |
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FLASH_ERROR_WRP, |
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FLASH_COMPLETE, |
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FLASH_TIMEOUT |
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}; |
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|
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static void __attribute__ ((used)) |
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flash_unlock (void) |
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{ |
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FLASH->KEYR = FLASH_KEY1; |
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FLASH->KEYR = FLASH_KEY2; |
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} |
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|
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|
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#define intr_disable() asm volatile ("cpsid i" : : : "memory") |
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#define intr_enable() asm volatile ("cpsie i" : : : "memory") |
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|
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#define FLASH_SR_BSY 0x01 |
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#define FLASH_SR_PGERR 0x04 |
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#define FLASH_SR_WRPRTERR 0x10 |
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#define FLASH_SR_EOP 0x20 |
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|
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#define FLASH_CR_PG 0x0001 |
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#define FLASH_CR_PER 0x0002 |
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#define FLASH_CR_MER 0x0004 |
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#define FLASH_CR_OPTPG 0x0010 |
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#define FLASH_CR_OPTER 0x0020 |
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#define FLASH_CR_STRT 0x0040 |
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#define FLASH_CR_LOCK 0x0080 |
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#define FLASH_CR_OPTWRE 0x0200 |
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#define FLASH_CR_ERRIE 0x0400 |
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#define FLASH_CR_EOPIE 0x1000 |
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|
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static int |
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flash_wait_for_last_operation (uint32_t timeout) |
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{ |
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int status; |
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|
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do |
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{ |
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status = FLASH->SR; |
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if (--timeout == 0) |
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break; |
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} |
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while ((status & FLASH_SR_BSY) != 0); |
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|
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return status & (FLASH_SR_BSY|FLASH_SR_PGERR|FLASH_SR_WRPRTERR); |
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} |
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|
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#define FLASH_PROGRAM_TIMEOUT 0x00010000 |
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#define FLASH_ERASE_TIMEOUT 0x01000000 |
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static int |
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flash_program_halfword (uintptr_t addr, uint16_t data) |
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{ |
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int status; |
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|
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status = flash_wait_for_last_operation (FLASH_PROGRAM_TIMEOUT); |
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|
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intr_disable (); |
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if (status == 0) |
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{ |
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FLASH->CR |= FLASH_CR_PG; |
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|
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*(volatile uint16_t *)addr = data; |
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status = flash_wait_for_last_operation (FLASH_PROGRAM_TIMEOUT); |
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FLASH->CR &= ~FLASH_CR_PG; |
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} |
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intr_enable (); |
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|
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return status; |
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} |
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|
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static int |
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flash_erase_page (uintptr_t addr) |
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{ |
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int status; |
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status = flash_wait_for_last_operation (FLASH_ERASE_TIMEOUT); |
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|
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intr_disable (); |
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if (status == 0) |
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{ |
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FLASH->CR |= FLASH_CR_PER; |
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FLASH->AR = addr; |
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FLASH->CR |= FLASH_CR_STRT; |
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|
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status = flash_wait_for_last_operation (FLASH_ERASE_TIMEOUT); |
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FLASH->CR &= ~FLASH_CR_PER; |
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} |
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intr_enable (); |
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return status; |
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} |
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static int |
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flash_check_blank (const uint8_t *p_start, size_t size) |
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{ |
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const uint8_t *p; |
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for (p = p_start; p < p_start + size; p++) |
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if (*p != 0xff) |
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return 0; |
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return 1; |
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} |
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#define FLASH_START_ADDR 0x08000000 /* Fixed for all STM32F1. */ |
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#define FLASH_OFFSET 0x1000 /* First pages are not-writable. */ |
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#define FLASH_START (FLASH_START_ADDR+FLASH_OFFSET) |
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#define CHIP_ID_REG ((uint32_t *)0xe0042000) |
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#define FLASH_SIZE_REG ((uint16_t *)0x1ffff7e0) |
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static int |
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flash_write (uintptr_t dst_addr, const uint8_t *src, size_t len) |
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{ |
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int status; |
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#if defined(STM32F103_OVERRIDE_FLASH_SIZE_KB) |
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uintptr_t flash_end = FLASH_START_ADDR + STM32F103_OVERRIDE_FLASH_SIZE_KB*1024; |
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#else |
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uintptr_t flash_end = FLASH_START_ADDR + (*FLASH_SIZE_REG)*1024; |
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#endif |
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if (dst_addr < FLASH_START || dst_addr + len > flash_end) |
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return 0; |
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while (len) |
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{ |
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uint16_t hw = *src++; |
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hw |= (*src++ << 8); |
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status = flash_program_halfword (dst_addr, hw); |
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if (status != 0) |
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return 0; /* error return */ |
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dst_addr += 2; |
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len -= 2; |
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} |
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return 1; |
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} |
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#define OPTION_BYTES_ADDR 0x1ffff800 |
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static int |
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flash_protect (void) |
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{ |
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int status; |
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uint32_t option_bytes_value; |
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status = flash_wait_for_last_operation (FLASH_ERASE_TIMEOUT); |
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intr_disable (); |
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if (status == 0) |
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{ |
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FLASH->OPTKEYR = FLASH_KEY1; |
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FLASH->OPTKEYR = FLASH_KEY2; |
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while (!(FLASH->CR & FLASH_CR_OPTWRE)) |
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; |
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FLASH->CR |= FLASH_CR_OPTER; |
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FLASH->CR |= FLASH_CR_STRT; |
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status = flash_wait_for_last_operation (FLASH_ERASE_TIMEOUT); |
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FLASH->CR &= ~FLASH_CR_OPTER; |
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} |
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intr_enable (); |
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if (status != 0) |
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return 0; |
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option_bytes_value = *(uint32_t *)OPTION_BYTES_ADDR; |
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return (option_bytes_value & 0xff) == 0xff ? 1 : 0; |
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} |
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static void __attribute__((naked)) |
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flash_erase_all_and_exec (void (*entry)(void)) |
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{ |
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uintptr_t addr = FLASH_START; |
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#if defined(STM32F103_OVERRIDE_FLASH_SIZE_KB) |
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uintptr_t end = FLASH_START_ADDR + STM32F103_OVERRIDE_FLASH_SIZE_KB*1024; |
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#else |
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uintptr_t end = FLASH_START_ADDR + (*FLASH_SIZE_REG)*1024; |
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#endif |
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uint32_t page_size = 1024; |
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int r; |
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if (((*CHIP_ID_REG) & 0xfff) == 0x0414) |
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page_size = 2048; |
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while (addr < end) |
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{ |
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r = flash_erase_page (addr); |
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if (r != 0) |
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break; |
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addr += page_size; |
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} |
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|
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if (addr >= end) |
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(*entry) (); |
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for (;;); |
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} |
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static void |
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nvic_system_reset (void) |
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{ |
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SCB->AIRCR = (0x05FA0000 | (SCB->AIRCR & 0x70) | SCB_AIRCR_SYSRESETREQ); |
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asm volatile ("dsb"); |
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for (;;); |
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} |
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static void __attribute__ ((naked)) |
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reset (void) |
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{ |
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extern const uint32_t FT0[256], FT1[256], FT2[256]; |
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/* |
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* This code may not be at the start of flash ROM, because of DFU. |
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* So, we take the address from PC. |
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*/ |
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asm volatile ("cpsid i\n\t" /* Mask all interrupts. */ |
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"ldr r0, 1f\n\t" /* r0 = SCB start */ |
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"mov r1, pc\n\t" /* r1 = (PC + 0x1000) & ~0x0fff */ |
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"mov r2, #0x1000\n\t" |
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"add r1, r1, r2\n\t" |
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"sub r2, r2, #1\n\t" |
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"bic r1, r1, r2\n\t" |
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"str r1, [r0, #8]\n\t" /* Set SCB->VTOR */ |
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"ldr r0, [r1], #4\n\t" |
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"msr MSP, r0\n\t" /* Main (exception handler) stack. */ |
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"ldr r0, [r1]\n\t" /* Reset handler. */ |
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"bx r0\n\t" |
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".align 2\n" |
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"1: .word 0xe000ed00" |
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: /* no output */ : /* no input */ : "memory"); |
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/* Never reach here. */ |
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/* Artificial entry to refer FT0, FT1, and FT2. */ |
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asm volatile ("" |
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: : "r" (FT0), "r" (FT1), "r" (FT2)); |
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} |
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typedef void (*handler)(void); |
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extern uint8_t __ram_end__; |
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handler vector[] __attribute__ ((section(".vectors"))) = { |
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(handler)&__ram_end__, |
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reset, |
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(handler)set_led, |
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flash_unlock, |
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(handler)flash_program_halfword, |
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(handler)flash_erase_page, |
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(handler)flash_check_blank, |
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(handler)flash_write, |
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(handler)flash_protect, |
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(handler)flash_erase_all_and_exec, |
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usb_lld_sys_init, |
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usb_lld_sys_shutdown, |
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nvic_system_reset, |
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clock_init, |
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gpio_init, |
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NULL, |
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}; |
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const uint8_t sys_version[8] __attribute__((section(".sys.version"))) = { |
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3*2+2, /* bLength */ |
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0x03, /* bDescriptorType = USB_STRING_DESCRIPTOR_TYPE */ |
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/* sys version: "3.0" */ |
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'3', 0, '.', 0, '0', 0, |
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}; |
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const uint32_t __attribute__((section(".sys.board_id"))) |
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sys_board_id = BOARD_ID; |
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const uint8_t __attribute__((section(".sys.board_name"))) |
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sys_board_name[] = BOARD_NAME; |
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|
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/* |
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* aes-constant-ft.c - AES forward tables. |
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* |
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* We need something useful for the initial flash ROM page (4 Ki |
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* bytes), which cannot be modified after installation. Even after |
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* upgrade of the firmware, it stays intact. |
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* |
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* We decide to put 3/4 of AES forward tables to fill 3 Ki bytes, as |
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* its useful and it won't change. |
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* |
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* The code was taken from aes.c of PolarSSL version 0.14, and then, |
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* modified to add section names. |
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* |
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* Since this is just a data, it wouldn't be copyright-able, but the |
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* original auther would claim so. Thus, we put original copyright |
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* notice here. It is highly likely that there will be no such a |
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* thing for copyright. Nevertheless, we think that PolarSSL is good |
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* software to address here, and encourage people using it. |
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* |
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*/ |
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|
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#include <stdint.h> |
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|
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/* |
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* Original copyright notice is below: |
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*/ |
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|
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/* |
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* FIPS-197 compliant AES implementation |
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* |
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* Copyright (C) 2006-2010, Brainspark B.V. |
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* |
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* This file is part of PolarSSL (http://www.polarssl.org) |
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org> |
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* |
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* All rights reserved. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
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*/ |
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/* |
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* The AES block cipher was designed by Vincent Rijmen and Joan Daemen. |
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* |
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* http://csrc.nist.gov/encryption/aes/rijndael/Rijndael.pdf |
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* http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf |
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*/ |
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|
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/* |
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* Forward tables |
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*/ |
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#define FT \ |
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\ |
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V(A5,63,63,C6), V(84,7C,7C,F8), V(99,77,77,EE), V(8D,7B,7B,F6), \ |
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V(0D,F2,F2,FF), V(BD,6B,6B,D6), V(B1,6F,6F,DE), V(54,C5,C5,91), \ |
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V(50,30,30,60), V(03,01,01,02), V(A9,67,67,CE), V(7D,2B,2B,56), \ |
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V(19,FE,FE,E7), V(62,D7,D7,B5), V(E6,AB,AB,4D), V(9A,76,76,EC), \ |
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V(45,CA,CA,8F), V(9D,82,82,1F), V(40,C9,C9,89), V(87,7D,7D,FA), \ |
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V(15,FA,FA,EF), V(EB,59,59,B2), V(C9,47,47,8E), V(0B,F0,F0,FB), \ |
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V(EC,AD,AD,41), V(67,D4,D4,B3), V(FD,A2,A2,5F), V(EA,AF,AF,45), \ |
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V(BF,9C,9C,23), V(F7,A4,A4,53), V(96,72,72,E4), V(5B,C0,C0,9B), \ |
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V(C2,B7,B7,75), V(1C,FD,FD,E1), V(AE,93,93,3D), V(6A,26,26,4C), \ |
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V(5A,36,36,6C), V(41,3F,3F,7E), V(02,F7,F7,F5), V(4F,CC,CC,83), \ |
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V(5C,34,34,68), V(F4,A5,A5,51), V(34,E5,E5,D1), V(08,F1,F1,F9), \ |
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V(93,71,71,E2), V(73,D8,D8,AB), V(53,31,31,62), V(3F,15,15,2A), \ |
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V(0C,04,04,08), V(52,C7,C7,95), V(65,23,23,46), V(5E,C3,C3,9D), \ |
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V(28,18,18,30), V(A1,96,96,37), V(0F,05,05,0A), V(B5,9A,9A,2F), \ |
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V(09,07,07,0E), V(36,12,12,24), V(9B,80,80,1B), V(3D,E2,E2,DF), \ |
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V(26,EB,EB,CD), V(69,27,27,4E), V(CD,B2,B2,7F), V(9F,75,75,EA), \ |
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V(1B,09,09,12), V(9E,83,83,1D), V(74,2C,2C,58), V(2E,1A,1A,34), \ |
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V(2D,1B,1B,36), V(B2,6E,6E,DC), V(EE,5A,5A,B4), V(FB,A0,A0,5B), \ |
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V(F6,52,52,A4), V(4D,3B,3B,76), V(61,D6,D6,B7), V(CE,B3,B3,7D), \ |
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V(7B,29,29,52), V(3E,E3,E3,DD), V(71,2F,2F,5E), V(97,84,84,13), \ |
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V(F5,53,53,A6), V(68,D1,D1,B9), V(00,00,00,00), V(2C,ED,ED,C1), \ |
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V(60,20,20,40), V(1F,FC,FC,E3), V(C8,B1,B1,79), V(ED,5B,5B,B6), \ |
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V(BE,6A,6A,D4), V(46,CB,CB,8D), V(D9,BE,BE,67), V(4B,39,39,72), \ |
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V(DE,4A,4A,94), V(D4,4C,4C,98), V(E8,58,58,B0), V(4A,CF,CF,85), \ |
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V(6B,D0,D0,BB), V(2A,EF,EF,C5), V(E5,AA,AA,4F), V(16,FB,FB,ED), \ |
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V(C5,43,43,86), V(D7,4D,4D,9A), V(55,33,33,66), V(94,85,85,11), \ |
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V(CF,45,45,8A), V(10,F9,F9,E9), V(06,02,02,04), V(81,7F,7F,FE), \ |
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V(F0,50,50,A0), V(44,3C,3C,78), V(BA,9F,9F,25), V(E3,A8,A8,4B), \ |
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V(F3,51,51,A2), V(FE,A3,A3,5D), V(C0,40,40,80), V(8A,8F,8F,05), \ |
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V(AD,92,92,3F), V(BC,9D,9D,21), V(48,38,38,70), V(04,F5,F5,F1), \ |
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V(DF,BC,BC,63), V(C1,B6,B6,77), V(75,DA,DA,AF), V(63,21,21,42), \ |
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V(30,10,10,20), V(1A,FF,FF,E5), V(0E,F3,F3,FD), V(6D,D2,D2,BF), \ |
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V(4C,CD,CD,81), V(14,0C,0C,18), V(35,13,13,26), V(2F,EC,EC,C3), \ |
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V(E1,5F,5F,BE), V(A2,97,97,35), V(CC,44,44,88), V(39,17,17,2E), \ |
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V(57,C4,C4,93), V(F2,A7,A7,55), V(82,7E,7E,FC), V(47,3D,3D,7A), \ |
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V(AC,64,64,C8), V(E7,5D,5D,BA), V(2B,19,19,32), V(95,73,73,E6), \ |
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V(A0,60,60,C0), V(98,81,81,19), V(D1,4F,4F,9E), V(7F,DC,DC,A3), \ |
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V(66,22,22,44), V(7E,2A,2A,54), V(AB,90,90,3B), V(83,88,88,0B), \ |
||
V(CA,46,46,8C), V(29,EE,EE,C7), V(D3,B8,B8,6B), V(3C,14,14,28), \ |
||
V(79,DE,DE,A7), V(E2,5E,5E,BC), V(1D,0B,0B,16), V(76,DB,DB,AD), \ |
||
V(3B,E0,E0,DB), V(56,32,32,64), V(4E,3A,3A,74), V(1E,0A,0A,14), \ |
||
V(DB,49,49,92), V(0A,06,06,0C), V(6C,24,24,48), V(E4,5C,5C,B8), \ |
||
V(5D,C2,C2,9F), V(6E,D3,D3,BD), V(EF,AC,AC,43), V(A6,62,62,C4), \ |
||
V(A8,91,91,39), V(A4,95,95,31), V(37,E4,E4,D3), V(8B,79,79,F2), \ |
||
V(32,E7,E7,D5), V(43,C8,C8,8B), V(59,37,37,6E), V(B7,6D,6D,DA), \ |
||
V(8C,8D,8D,01), V(64,D5,D5,B1), V(D2,4E,4E,9C), V(E0,A9,A9,49), \ |
||
V(B4,6C,6C,D8), V(FA,56,56,AC), V(07,F4,F4,F3), V(25,EA,EA,CF), \ |
||
V(AF,65,65,CA), V(8E,7A,7A,F4), V(E9,AE,AE,47), V(18,08,08,10), \ |
||
V(D5,BA,BA,6F), V(88,78,78,F0), V(6F,25,25,4A), V(72,2E,2E,5C), \ |
||
V(24,1C,1C,38), V(F1,A6,A6,57), V(C7,B4,B4,73), V(51,C6,C6,97), \ |
||
V(23,E8,E8,CB), V(7C,DD,DD,A1), V(9C,74,74,E8), V(21,1F,1F,3E), \ |
||
V(DD,4B,4B,96), V(DC,BD,BD,61), V(86,8B,8B,0D), V(85,8A,8A,0F), \ |
||
V(90,70,70,E0), V(42,3E,3E,7C), V(C4,B5,B5,71), V(AA,66,66,CC), \ |
||
V(D8,48,48,90), V(05,03,03,06), V(01,F6,F6,F7), V(12,0E,0E,1C), \ |
||
V(A3,61,61,C2), V(5F,35,35,6A), V(F9,57,57,AE), V(D0,B9,B9,69), \ |
||
V(91,86,86,17), V(58,C1,C1,99), V(27,1D,1D,3A), V(B9,9E,9E,27), \ |
||
V(38,E1,E1,D9), V(13,F8,F8,EB), V(B3,98,98,2B), V(33,11,11,22), \ |
||
V(BB,69,69,D2), V(70,D9,D9,A9), V(89,8E,8E,07), V(A7,94,94,33), \ |
||
V(B6,9B,9B,2D), V(22,1E,1E,3C), V(92,87,87,15), V(20,E9,E9,C9), \ |
||
V(49,CE,CE,87), V(FF,55,55,AA), V(78,28,28,50), V(7A,DF,DF,A5), \ |
||
V(8F,8C,8C,03), V(F8,A1,A1,59), V(80,89,89,09), V(17,0D,0D,1A), \ |
||
V(DA,BF,BF,65), V(31,E6,E6,D7), V(C6,42,42,84), V(B8,68,68,D0), \ |
||
V(C3,41,41,82), V(B0,99,99,29), V(77,2D,2D,5A), V(11,0F,0F,1E), \ |
||
V(CB,B0,B0,7B), V(FC,54,54,A8), V(D6,BB,BB,6D), V(3A,16,16,2C) |
||
|
||
#define V(a,b,c,d) 0x##a##b##c##d |
||
const uint32_t FT0[256] __attribute__((section(".sys.0"))) = { FT }; |
||
#undef V |
||
|
||
#define V(a,b,c,d) 0x##b##c##d##a |
||
const uint32_t FT1[256] __attribute__((section(".sys.1"))) = { FT }; |
||
#undef V |
||
|
||
#define V(a,b,c,d) 0x##c##d##a##b |
||
const uint32_t FT2[256] __attribute__((section(".sys.2"))) = { FT }; |
||
#undef V |
||
|
||
#ifdef ORIGINAL_IMPLEMENTATION |
||
#define V(a,b,c,d) 0x##d##a##b##c |
||
const uint32_t FT3[256] = { FT }; |
||
#undef V |
||
#endif
|
||
|