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/*
* Copyright (C) 2017-2019 Alibaba Group Holding Limited
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-08-20 zx.chen startup file. Should use with
* GCC for T-HEAD Embedded Processors
*/
#include <csi_config.h>
.section .vectors, "aw", @progbits
.align 6
.globl __Vectors
.type __Vectors, @object
__Vectors:
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long PendSV_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long SysTick_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
/* External interrupts */
.long USART_IRQHandler
.long Default_Handler
.long TIM0_IRQHandler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.long Default_Handler
.size __Vectors,.-__Vectors
.text
.align 2
_start:
.text
.align 2
.globl Reset_Handler
.type Reset_Handler, %function
Reset_Handler:
.option push
.option norelax
la gp, __global_pointer$
.option pop
la a0, Default_Handler
ori a0, a0, 3
csrw mtvec, a0
la a0, __Vectors
csrw mtvt, a0
la sp, __StackTop
csrw mscratch, sp
/* Load data section */
la a0, __erodata
la a1, __data_start__
la a2, __data_end__
bgeu a1, a2, 2f
1:
lw t0, (a0)
sw t0, (a1)
addi a0, a0, 4
addi a1, a1, 4
bltu a1, a2, 1b
2:
/* Clear bss section */
la a0, __bss_start__
la a1, __bss_end__
bgeu a0, a1, 2f
1:
sw zero, (a0)
addi a0, a0, 4
bltu a0, a1, 1b
2:
#ifndef __NO_SYSTEM_INIT
jal SystemInit
#endif
jal entry
.size Reset_Handler, . - Reset_Handler
__exit:
j __exit
.section .bss
.align 3
.global g_base_irqstack
.global g_top_irqstack
g_base_irqstack:
.space CONFIG_ARCH_INTERRUPTSTACK
g_top_irqstack:
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