mirror of https://github.com/wolfSSL/wolfBoot.git
70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
/* boot_renesas.c
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*
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* Copyright (C) 2023 wolfSSL Inc.
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*
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* This file is part of wolfBoot.
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*
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* wolfBoot 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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* wolfBoot 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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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#include <stdint.h>
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#include <wolfssl/wolfcrypt/settings.h>
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#include "wolfboot/wolfboot.h"
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#include "hal.h"
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/* This is the main loop for the bootloader.
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*
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* It performs the following actions:
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* - globally disable interrupts
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* - update the Interrupt Vector using the address of the app
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* - Set the initial stack pointer and the offset of the app
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* - Change the stack pointer
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* - Call the application entry point
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*
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*/
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#pragma inline_asm longJump
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static void longJump(const uint32_t *app_offset)
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{
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jmp r1;
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}
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void do_boot(const uint32_t *app_offset)
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{
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void (*app_entry)(void);
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uint32_t app_sp;
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(void) app_offset;
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(void) app_sp;
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(void) app_entry;
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#if defined(__CCRX__)
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longJump(app_offset);
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#elif defined(_RENESAS_RA_)
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app_sp = VECTOR_SP;
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__asm__ ("ldr r3, [%0]" ::"r"(app_sp));
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__asm__ ("mov sp, r3");
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/*
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* address of Reset Handler is stored in Vector table[] that is defined in startup.c.
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* The vector for Reset Handler is placed right after Initial Stack Pointer.
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* The application assumes to start from 0x10200.
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*
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*/
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app_entry = (void(*)(void))(*VECTOR_Reset_Handler);
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(*app_entry)();
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#endif
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}
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