mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-25 07:48:10 +00:00
277 lines
6.5 KiB
C
277 lines
6.5 KiB
C
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (c) SatoshiLabs
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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 3 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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include STM32_HAL_H
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include "py/compile.h"
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#include "py/gc.h"
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#include "py/mperrno.h"
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#include "py/nlr.h"
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#include "py/repl.h"
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#include "py/runtime.h"
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#include "py/stackctrl.h"
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#include "shared/runtime/pyexec.h"
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#include "ports/stm32/gccollect.h"
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#include "ports/stm32/pendsv.h"
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#include "bl_check.h"
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#include "board_capabilities.h"
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#include "common.h"
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#include "compiler_traits.h"
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#include "display.h"
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#include "flash.h"
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#include "image.h"
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#include "mpu.h"
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#include "random_delays.h"
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#ifdef USE_RGB_LED
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#include "rgb_led.h"
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#endif
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#ifdef USE_DMA2D
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#include "dma2d.h"
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#endif
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#ifdef USE_BUTTON
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#include "button.h"
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#endif
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#ifdef USE_TOUCH
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#include "touch/touch.h"
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#endif
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#ifdef USE_SD_CARD
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#include "sdcard.h"
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#endif
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#ifdef SYSTEM_VIEW
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#include "systemview.h"
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#endif
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#include "rng.h"
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#include "stm32.h"
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#include "supervise.h"
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#ifdef USE_SECP256K1_ZKP
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#include "zkp_context.h"
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#endif
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// from util.s
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extern void shutdown_privileged(void);
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int main(void) {
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random_delays_init();
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#ifdef RDI
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rdi_start();
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#endif
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// reinitialize HAL for Trezor One
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#if defined TREZOR_MODEL_1
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HAL_Init();
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#endif
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collect_hw_entropy();
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#ifdef SYSTEM_VIEW
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enable_systemview();
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#endif
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display_reinit();
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#if !defined TREZOR_MODEL_1
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parse_boardloader_capabilities();
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#if PRODUCTION
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check_and_replace_bootloader();
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#endif
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// Enable MPU
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mpu_config_firmware();
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#endif
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// Init peripherals
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pendsv_init();
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#ifdef USE_DMA2D
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dma2d_init();
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#endif
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#if !PRODUCTION
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// enable BUS fault and USAGE fault handlers
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SCB->SHCSR |= (SCB_SHCSR_USGFAULTENA_Msk | SCB_SHCSR_BUSFAULTENA_Msk);
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#endif
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#if defined TREZOR_MODEL_T
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set_core_clock(CLOCK_180_MHZ);
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#endif
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#ifdef USE_BUTTON
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button_init();
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#endif
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#ifdef USE_RGB_LED
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rgb_led_init();
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#endif
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#ifdef USE_TOUCH
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touch_init();
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#endif
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#ifdef USE_SD_CARD
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sdcard_init();
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#endif
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#if !defined TREZOR_MODEL_1
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// jump to unprivileged mode
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// http://infocenter.arm.com/help/topic/com.arm.doc.dui0552a/CHDBIBGJ.html
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__asm__ volatile("msr control, %0" ::"r"(0x1));
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__asm__ volatile("isb");
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#endif
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#ifdef USE_SECP256K1_ZKP
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ensure(sectrue * (zkp_context_init() == 0), NULL);
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#endif
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printf("CORE: Preparing stack\n");
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// Stack limit should be less than real stack size, so we have a chance
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// to recover from limit hit.
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mp_stack_set_top(&_estack);
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mp_stack_set_limit((char *)&_estack - (char *)&_sstack - 1024);
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#if MICROPY_ENABLE_PYSTACK
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static mp_obj_t pystack[1024];
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mp_pystack_init(pystack, &pystack[MP_ARRAY_SIZE(pystack)]);
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#endif
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// GC init
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printf("CORE: Starting GC\n");
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gc_init(&_heap_start, &_heap_end);
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// Interpreter init
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printf("CORE: Starting interpreter\n");
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mp_init();
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mp_obj_list_init(mp_sys_argv, 0);
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mp_obj_list_init(mp_sys_path, 0);
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mp_obj_list_append(
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mp_sys_path,
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MP_OBJ_NEW_QSTR(MP_QSTR_)); // current dir (or base dir of the script)
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// Execute the main script
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printf("CORE: Executing main script\n");
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pyexec_frozen_module("main.py");
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// Clean up
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printf("CORE: Main script finished, cleaning up\n");
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mp_deinit();
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return 0;
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}
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// MicroPython default exception handler
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void __attribute__((noreturn)) nlr_jump_fail(void *val) {
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error_shutdown("INTERNAL ERROR!", "(UE)");
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}
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// interrupt handlers
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void NMI_Handler(void) {
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// Clock Security System triggered NMI
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if ((RCC->CIR & RCC_CIR_CSSF) != 0) {
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error_shutdown("INTERNAL ERROR!", "(CS)");
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}
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}
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void HardFault_Handler(void) { error_shutdown("INTERNAL ERROR!", "(HF)"); }
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void MemManage_Handler_MM(void) { error_shutdown("INTERNAL ERROR!", "(MM)"); }
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void MemManage_Handler_SO(void) { error_shutdown("INTERNAL ERROR!", "(SO)"); }
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void BusFault_Handler(void) { error_shutdown("INTERNAL ERROR!", "(BF)"); }
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void UsageFault_Handler(void) { error_shutdown("INTERNAL ERROR!", "(UF)"); }
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__attribute__((noreturn)) void reboot_to_bootloader() {
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jump_to_with_flag(BOOTLOADER_START + IMAGE_HEADER_SIZE,
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STAY_IN_BOOTLOADER_FLAG);
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for (;;)
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;
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}
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void SVC_C_Handler(uint32_t *stack) {
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uint8_t svc_number = ((uint8_t *)stack[6])[-2];
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switch (svc_number) {
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case SVC_ENABLE_IRQ:
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HAL_NVIC_EnableIRQ(stack[0]);
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break;
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case SVC_DISABLE_IRQ:
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HAL_NVIC_DisableIRQ(stack[0]);
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break;
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case SVC_SET_PRIORITY:
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NVIC_SetPriority(stack[0], stack[1]);
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break;
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#ifdef SYSTEM_VIEW
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case SVC_GET_DWT_CYCCNT:
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cyccnt_cycles = *DWT_CYCCNT_ADDR;
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break;
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#endif
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case SVC_SHUTDOWN:
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shutdown_privileged();
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for (;;)
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;
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break;
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case SVC_REBOOT_TO_BOOTLOADER:
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ensure_compatible_settings();
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mpu_config_bootloader();
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__asm__ volatile("msr control, %0" ::"r"(0x0));
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__asm__ volatile("isb");
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// See stack layout in
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// https://developer.arm.com/documentation/ka004005/latest We are changing
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// return address in PC to land into reboot to avoid any bug with ROP and
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// raising privileges.
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stack[6] = (uintptr_t)reboot_to_bootloader;
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return;
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default:
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stack[0] = 0xffffffff;
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break;
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}
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}
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__attribute__((naked)) void SVC_Handler(void) {
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__asm volatile(
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" tst lr, #4 \n" // Test Bit 3 to see which stack pointer we should
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// use.
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" ite eq \n" // Tell the assembler that the nest 2 instructions
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// are if-then-else
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" mrseq r0, msp \n" // Make R0 point to main stack pointer
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" mrsne r0, psp \n" // Make R0 point to process stack pointer
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" b SVC_C_Handler \n" // Off to C land
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);
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}
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// MicroPython builtin stubs
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mp_import_stat_t mp_import_stat(const char *path) {
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return MP_IMPORT_STAT_NO_EXIST;
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}
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mp_obj_t mp_builtin_open(uint n_args, const mp_obj_t *args, mp_map_t *kwargs) {
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_KW(mp_builtin_open_obj, 1, mp_builtin_open);
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