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/*
* Copyright 2021-2022 hpmicro
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <stdint.h>
#include "hpm_common.h"
#include "hpm_soc.h"
#include "hpm_l1c_drv.h"
#include "hpm_interrupt.h"
#ifdef __cplusplus
extern "C" {
#endif
extern void system_init(void);
extern void __libc_init_array(void);
extern void __libc_fini_array(void);
#ifdef __cplusplus
}
#endif
__attribute__((weak)) void _clean_up(void)
{
/* clean up plic, it will help while debuging */
disable_irq_from_intc();
intc_m_set_threshold(0);
for (uint32_t irq = 0; irq < 128; irq++) {
intc_m_complete_irq(irq);
}
/* clear any bits left in plic enable regster */
for (uint32_t i = 0; i < 4; i++) {
*(volatile uint32_t *)(HPM_PLIC_BASE + HPM_PLIC_ENABLE_OFFSET + (i << 2)) = 0;
}
}
__attribute__((weak)) void c_startup(void)
{
uint32_t i, size;
#if defined(FLASH_XIP) || defined(FLASH_UF2)
extern uint8_t __vector_ram_start__[], __vector_ram_end__[], __vector_load_addr__[];
size = __vector_ram_end__ - __vector_ram_start__;
for (i = 0; i < size; i++) {
*(__vector_ram_start__ + i) = *(__vector_load_addr__ + i);
}
#endif
extern uint8_t __etext[];
extern uint8_t __bss_start__[], __bss_end__[];
extern uint8_t __data_start__[], __data_end__[];
extern uint8_t __noncacheable_bss_start__[], __noncacheable_bss_end__[];
extern uint8_t __ramfunc_start__[], __ramfunc_end__[];
extern uint8_t __noncacheable_init_start__[], __noncacheable_init_end__[];
/* bss section */
size = __bss_end__ - __bss_start__;
for (i = 0; i < size; i++) {
*(__bss_start__ + i) = 0;
}
/* noncacheable bss section */
size = __noncacheable_bss_end__ - __noncacheable_bss_start__;
for (i = 0; i < size; i++) {
*(__noncacheable_bss_start__ + i) = 0;
}
/* data section LMA: etext */
size = __data_end__ - __data_start__;
for (i = 0; i < size; i++) {
*(__data_start__ + i) = *(__etext + i);
}
/* ramfunc section LMA: etext + data length */
size = __ramfunc_end__ - __ramfunc_start__;
for (i = 0; i < size; i++) {
*(__ramfunc_start__ + i) = *(__etext + (__data_end__ - __data_start__) + i);
}
/* noncacheable init section LMA: etext + data length + ramfunc legnth */
size = __noncacheable_init_end__ - __noncacheable_init_start__;
for (i = 0; i < size; i++) {
*(__noncacheable_init_start__ + i) = *(__etext + (__data_end__ - __data_start__) + (__ramfunc_end__ - __ramfunc_start__) + i);
}
}
__attribute__((weak)) int main(void)
{
while(1);
}
__attribute__((weak)) void reset_handler(void)
{
l1c_dc_disable();
l1c_dc_invalidate_all();
#if !defined(__SEGGER_RTL_VERSION) || defined(__GNU_LINKER)
/*
* Initialize LMA/VMA sections.
* Relocation for any sections that need to be copied from LMA to VMA.
*/
c_startup();
#endif
/* Call platform specific hardware initialization */
system_init();
#ifdef __cplusplus
/* Do global constructors */
__libc_init_array();
#endif
/* Entry function */
main();
}
/*
* When compiling C++ code with static objects, the compiler inserts
* a call to __cxa_atexit() with __dso_handle as one of the arguments.
* The dummy versions of these symbols should be provided.
*/
void __cxa_atexit(void (*arg1)(void*), void* arg2, void* arg3)
{
}
#ifndef __SEGGER_RTL_VERSION
void* __dso_handle = (void*) &__dso_handle;
#endif
__attribute__((weak)) void _init()
{
}
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