rt-thread/bsp/hpmicro/hpm6750evk/startup/HPM6750/startup.c

/*
 * Copyright (c) 2021-2025 HPMicro
 *
 *
 */

 #include "hpm_common.h"
 #include "hpm_soc.h"
 #include "hpm_l1c_drv.h"
 #include <rtthread.h>
 
 void system_init(void);
 
 extern int entry(void);
 
 extern void __libc_init_array(void);
 extern void __libc_fini_array(void);
 
 void system_init(void)
 {
     disable_global_irq(CSR_MSTATUS_MIE_MASK);
     disable_irq_from_intc();
     enable_irq_from_intc();
     enable_global_irq(CSR_MSTATUS_MIE_MASK);
 #ifndef CONFIG_NOT_ENABLE_ICACHE
     l1c_ic_enable();
 #endif
 #ifndef CONFIG_NOT_ENABLE_DCACHE
     l1c_dc_enable();
 #endif
 }
 
 __attribute__((weak)) void c_startup(void)
 {
 #ifndef __SES_RISCV
     uint32_t i, size;
 #ifdef FLASH_XIP
     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 __tbss_start__[], __tbss_end__[];
     extern uint8_t __tdata_start__[], __tdata_end__[];
     extern uint8_t __fast_load_addr__[];
     extern uint8_t __noncacheable_init_load_addr__[];
     extern uint8_t __data_load_addr__[];
     extern uint8_t __tdata_load_addr__[];
     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__[];
 
     /* tbss section */
     size = __tbss_end__ - __tbss_start__;
     for (i = 0; i < size; i++) {
         *(__tbss_start__ + i) = 0;
     }
 
     /* 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;
     }
 
     /* tdata section LMA: etext */
     size = __tdata_end__ - __tdata_start__;
     for (i = 0; i < size; i++) {
         *(__tdata_start__ + i) = *(__tdata_load_addr__ + i);
     }
 
     /* data section LMA: etext */
     size = __data_end__ - __data_start__;
     for (i = 0; i < size; i++) {
         *(__data_start__ + i) = *(__data_load_addr__ + i);
     }
 
     /* ramfunc section LMA: etext + data length */
     size = __ramfunc_end__ - __ramfunc_start__;
     for (i = 0; i < size; i++) {
         *(__ramfunc_start__ + i) = *(__fast_load_addr__ + i);
     }
 
     /* noncacheable init section LMA: etext + data length + ramfunc length */
     size = __noncacheable_init_end__ - __noncacheable_init_start__;
     for (i = 0; i < size; i++) {
         *(__noncacheable_init_start__ + i) = *(__noncacheable_init_load_addr__ + i);
     }
     /* NOTE: Invalid I-Cache in case the I-Cache was filled with incorrect data during prefetch before copying the ram
     *       function code to its destination.
     */
     fencei();
 #endif
 }
 
 __attribute__((weak)) int main(void)
 {
     while(1);
 }
 
 void reset_handler(void)
 {
     /**
      * Disable preemptive interrupt
      */
     HPM_PLIC->FEATURE = 0;
     /*
      * Initialize LMA/VMA sections.
      * Relocation for any sections that need to be copied from LMA to VMA.
      */
     c_startup();
 
     /* Call platform specific hardware initialization */
     system_init();
 
 #ifndef __SES_RISCV
     /* Do global constructors */
     __libc_init_array();
 #endif
 
     /* Entry function */
     entry();
 }
 
 
 __attribute__((weak)) void _init(void)
 {
 }