2020-09-11 10:11:25 +08:00
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/*
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* Copyright (C) 2017-2019 Alibaba Group Holding Limited
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2020-08-20 zx.chen startup file. Should use with
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* GCC for T-HEAD Embedded Processors
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*/
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#include <csi_config.h>
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.section .vectors, "aw", @progbits
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.align 6
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.globl __Vectors
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.type __Vectors, @object
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__Vectors:
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long PendSV_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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2021-07-14 20:12:55 +08:00
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.long SysTick_Handler
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2020-09-11 10:11:25 +08:00
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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/* External interrupts */
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2021-07-14 20:12:55 +08:00
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.long USART_IRQHandler
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.long Default_Handler
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.long TIM0_IRQHandler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.long Default_Handler
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.size __Vectors,.-__Vectors
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2020-09-11 10:11:25 +08:00
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.text
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.align 2
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_start:
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.text
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.align 2
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.globl Reset_Handler
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.type Reset_Handler, %function
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Reset_Handler:
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.option push
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.option norelax
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la gp, __global_pointer$
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.option pop
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la a0, Default_Handler
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ori a0, a0, 3
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csrw mtvec, a0
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la a0, __Vectors
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csrw mtvt, a0
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la sp, __StackTop
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csrw mscratch, sp
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/* Load data section */
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la a0, __erodata
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la a1, __data_start__
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la a2, __data_end__
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bgeu a1, a2, 2f
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1:
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lw t0, (a0)
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sw t0, (a1)
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addi a0, a0, 4
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addi a1, a1, 4
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bltu a1, a2, 1b
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2:
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/* Clear bss section */
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la a0, __bss_start__
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la a1, __bss_end__
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bgeu a0, a1, 2f
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1:
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sw zero, (a0)
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addi a0, a0, 4
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bltu a0, a1, 1b
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2:
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#ifndef __NO_SYSTEM_INIT
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jal SystemInit
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#endif
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jal entry
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.size Reset_Handler, . - Reset_Handler
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__exit:
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j __exit
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.section .bss
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.align 3
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.global g_base_irqstack
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.global g_top_irqstack
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g_base_irqstack:
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.space CONFIG_ARCH_INTERRUPTSTACK
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g_top_irqstack:
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