213 lines
7.2 KiB
C
213 lines
7.2 KiB
C
/*
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ChibiOS - Copyright (C) 2020 Patrick Seidel
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ChibiOS - Copyright (C) 2021 Stefan Kerkmann
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file crt1.c
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* @brief Startup stub functions.
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*
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* @addtogroup RISCV_ECLIC_STARTUP
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* @{
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*/
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#include <stdbool.h>
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#include <stdint.h>
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/*===========================================================================*/
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/* Module local definitions. */
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/*===========================================================================*/
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#if !defined(CRT1_AREAS_NUMBER) || defined(__DOXYGEN__)
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#define CRT1_AREAS_NUMBER 8
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#endif
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#if (CRT1_AREAS_NUMBER < 0) || (CRT1_AREAS_NUMBER > 8)
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#error "CRT1_AREAS_NUMBER must be within 0 and 8"
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#endif
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/*===========================================================================*/
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/* Module exported variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module local types. */
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/*===========================================================================*/
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/**
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* @brief Type of an area to be initialized.
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*/
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typedef struct {
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uint32_t *init_text_area;
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uint32_t *init_area;
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uint32_t *clear_area;
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uint32_t *no_init_area;
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} ram_init_area_t;
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/*===========================================================================*/
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/* Module local variables. */
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/*===========================================================================*/
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#if (CRT1_AREAS_NUMBER > 0) || defined(__DOXYGEN__)
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extern uint32_t __ram0_init_text__, __ram0_init__, __ram0_clear__, __ram0_noinit__;
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#endif
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#if (CRT1_AREAS_NUMBER > 1) || defined(__DOXYGEN__)
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extern uint32_t __ram1_init_text__, __ram1_init__, __ram1_clear__, __ram1_noinit__;
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#endif
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#if (CRT1_AREAS_NUMBER > 2) || defined(__DOXYGEN__)
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extern uint32_t __ram2_init_text__, __ram2_init__, __ram2_clear__, __ram2_noinit__;
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#endif
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#if (CRT1_AREAS_NUMBER > 3) || defined(__DOXYGEN__)
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extern uint32_t __ram3_init_text__, __ram3_init__, __ram3_clear__, __ram3_noinit__;
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#endif
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#if (CRT1_AREAS_NUMBER > 4) || defined(__DOXYGEN__)
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extern uint32_t __ram4_init_text__, __ram4_init__, __ram4_clear__, __ram4_noinit__;
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#endif
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#if (CRT1_AREAS_NUMBER > 5) || defined(__DOXYGEN__)
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extern uint32_t __ram5_init_text__, __ram5_init__, __ram5_clear__, __ram5_noinit__;
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#endif
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#if (CRT1_AREAS_NUMBER > 6) || defined(__DOXYGEN__)
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extern uint32_t __ram6_init_text__, __ram6_init__, __ram6_clear__, __ram6_noinit__;
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#endif
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#if (CRT1_AREAS_NUMBER > 7) || defined(__DOXYGEN__)
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extern uint32_t __ram7_init_text__, __ram7_init__, __ram7_clear__, __ram7_noinit__;
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#endif
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/**
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* @brief Static table of areas to be initialized.
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*/
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#if (CRT1_AREAS_NUMBER > 0) || defined(__DOXYGEN__)
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static const ram_init_area_t ram_areas[CRT1_AREAS_NUMBER] = {
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{&__ram0_init_text__, &__ram0_init__, &__ram0_clear__, &__ram0_noinit__},
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#if (CRT1_AREAS_NUMBER > 1) || defined(__DOXYGEN__)
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{&__ram1_init_text__, &__ram1_init__, &__ram1_clear__, &__ram1_noinit__},
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#endif
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#if (CRT1_AREAS_NUMBER > 2) || defined(__DOXYGEN__)
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{&__ram2_init_text__, &__ram2_init__, &__ram2_clear__, &__ram2_noinit__},
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#endif
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#if (CRT1_AREAS_NUMBER > 3) || defined(__DOXYGEN__)
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{&__ram3_init_text__, &__ram3_init__, &__ram3_clear__, &__ram3_noinit__},
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#endif
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#if (CRT1_AREAS_NUMBER > 4) || defined(__DOXYGEN__)
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{&__ram4_init_text__, &__ram4_init__, &__ram4_clear__, &__ram4_noinit__},
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#endif
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#if (CRT1_AREAS_NUMBER > 5) || defined(__DOXYGEN__)
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{&__ram5_init_text__, &__ram5_init__, &__ram5_clear__, &__ram5_noinit__},
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#endif
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#if (CRT1_AREAS_NUMBER > 6) || defined(__DOXYGEN__)
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{&__ram6_init_text__, &__ram6_init__, &__ram6_clear__, &__ram6_noinit__},
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#endif
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#if (CRT1_AREAS_NUMBER > 7) || defined(__DOXYGEN__)
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{&__ram7_init_text__, &__ram7_init__, &__ram7_clear__, &__ram7_noinit__},
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#endif
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};
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#endif
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/*===========================================================================*/
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/* Module local functions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module exported functions. */
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/*===========================================================================*/
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/**
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* @brief Architecture-dependent core initialization.
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* @details This hook is invoked immediately after the stack initialization
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* and before the DATA and BSS segments initialization.
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* @note This function is a weak symbol.
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*/
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#if !defined(__DOXYGEN__)
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__attribute__((weak))
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#endif
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/*lint -save -e9075 [8.4] All symbols are invoked from asm context.*/
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void __core_init(void) {}
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/**
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* @brief Early initialization.
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* @details This hook is invoked immediately after the stack initialization
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* and before the DATA and BSS segments initialization. The
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* default behavior is to do nothing.
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* @note This function is a weak symbol.
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*/
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#if !defined(__DOXYGEN__)
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__attribute__((weak))
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#endif
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/*lint -save -e9075 [8.4] All symbols are invoked from asm context.*/
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void __early_init(void) {}
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/*lint -restore*/
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/**
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* @brief Late initialization.
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* @details This hook is invoked after the DATA and BSS segments
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* initialization and before any static constructor. The
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* default behavior is to do nothing.
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* @note This function is a weak symbol.
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*/
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#if !defined(__DOXYGEN__)
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__attribute__((weak))
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#endif
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/*lint -save -e9075 [8.4] All symbols are invoked from asm context.*/
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void __late_init(void) {}
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/*lint -restore*/
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/**
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* @brief Default @p main() function exit handler.
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* @details This handler is invoked or the @p main() function exit. The
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* default behavior is to enter an infinite loop.
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* @note This function is a weak symbol.
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*/
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#if !defined(__DOXYGEN__)
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__attribute__((noreturn, weak))
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#endif
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/*lint -save -e9075 [8.4] All symbols are invoked from asm context.*/
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void __default_exit(void) {
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/*lint -restore*/
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while (true) {
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}
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}
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/**
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* @brief Performs the initialization of the various RAM areas.
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*/
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void __init_ram_areas(void) {
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#if CRT1_AREAS_NUMBER > 0
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const ram_init_area_t *rap = ram_areas;
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do {
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uint32_t *tp = rap->init_text_area;
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uint32_t *p = rap->init_area;
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/* Copying initialization data.*/
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while (p < rap->clear_area) {
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*p = *tp;
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p++;
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tp++;
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}
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/* Zeroing clear area.*/
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while (p < rap->no_init_area) {
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*p = 0;
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p++;
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}
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rap++;
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}
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while (rap < &ram_areas[CRT1_AREAS_NUMBER]);
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#endif
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}
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/** @} */
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