port TencentOS tiny to RISC-V
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acezhao
209
arch/risc-v/rv32i/start.S
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209
arch/risc-v/rv32i/start.S
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// See LICENSE for license details.
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#include "riscv_encoding.h"
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.section .text.entry
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.globl _start
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.type _start,@function
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_start:
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csrc mstatus, MSTATUS_MIE
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csrw mie, 0
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la t0, machine_trap_entry
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csrw mtvec, t0
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#if 1
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// before kernel run, the stack is unused
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// so just borrow to use
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la t0, k_idle_task_stk_addr
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lw t1, k_idle_task_stk_size
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add sp, t0, t1
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#else
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// uncomment in link.ld
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la sp, _stack_top
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#endif
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/* Load data section */
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la a0, _load_data
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la a1, _data
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la a2, _edata
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bgeu a1, a2, begin_clear_bss
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clear_data:
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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, clear_data
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begin_clear_bss:
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// clear bss section
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la a0, _bss
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la a1, _ebss
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bgeu a0, a1, init_finish
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clear_bss:
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sw zero, (a0)
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addi a0, a0, 4
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bltu a0, a1, clear_bss
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init_finish:
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call main
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__die:
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j __die
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.section .text
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.weak eclic_msip_handler
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.weak eclic_mtip_handler
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.weak SysTick_IRQHandler
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.weak eclic_bwei_handler
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.weak eclic_pmovi_handler
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.weak WWDGT_IRQHandler
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.weak LVD_IRQHandler
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.weak TAMPER_IRQHandler
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.weak RTC_IRQHandler
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.weak FMC_IRQHandler
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.weak RCU_IRQHandler
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.weak EXTI0_IRQHandler
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.weak EXTI1_IRQHandler
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.weak EXTI2_IRQHandler
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.weak EXTI3_IRQHandler
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.weak EXTI4_IRQHandler
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.weak DMA0_Channel0_IRQHandler
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.weak DMA0_Channel1_IRQHandler
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.weak DMA0_Channel2_IRQHandler
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.weak DMA0_Channel3_IRQHandler
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.weak DMA0_Channel4_IRQHandler
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.weak DMA0_Channel5_IRQHandler
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.weak DMA0_Channel6_IRQHandler
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.weak ADC0_1_IRQHandler
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.weak CAN0_TX_IRQHandler
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.weak CAN0_RX0_IRQHandler
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.weak CAN0_RX1_IRQHandler
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.weak CAN0_EWMC_IRQHandler
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.weak EXTI5_9_IRQHandler
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.weak TIMER0_BRK_IRQHandler
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.weak TIMER0_UP_IRQHandler
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.weak TIMER0_TRG_CMT_IRQHandler
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.weak TIMER0_Channel_IRQHandler
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.weak TIMER1_IRQHandler
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.weak TIMER2_IRQHandler
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.weak TIMER3_IRQHandler
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.weak I2C0_EV_IRQHandler
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.weak I2C0_ER_IRQHandler
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.weak I2C1_EV_IRQHandler
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.weak I2C1_ER_IRQHandler
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.weak SPI0_IRQHandler
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.weak SPI1_IRQHandler
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.weak USART0_IRQHandler
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.weak USART1_IRQHandler
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.weak USART2_IRQHandler
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.weak EXTI10_15_IRQHandler
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.weak RTC_Alarm_IRQHandler
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.weak USBFS_WKUP_IRQHandler
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.weak EXMC_IRQHandler
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.weak TIMER4_IRQHandler
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.weak SPI2_IRQHandler
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.weak UART3_IRQHandler
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.weak UART4_IRQHandler
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.weak TIMER5_IRQHandler
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.weak TIMER6_IRQHandler
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.weak DMA1_Channel0_IRQHandler
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.weak DMA1_Channel1_IRQHandler
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.weak DMA1_Channel2_IRQHandler
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.weak DMA1_Channel3_IRQHandler
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.weak DMA1_Channel4_IRQHandler
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.weak CAN1_TX_IRQHandler
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.weak CAN1_RX0_IRQHandler
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.weak CAN1_RX1_IRQHandler
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.weak CAN1_EWMC_IRQHandler
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.weak USBFS_IRQHandler
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.global handler_vector_table
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.align 2
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handler_vector_table:
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.word 0
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.word 0
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.word 0
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.word eclic_msip_handler
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.word 0
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.word 0
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.word 0
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.word SysTick_IRQHandler
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.word 0
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.word 0
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.word 0
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.word 0
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.word 0
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.word 0
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.word 0
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.word 0
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.word 0
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.word eclic_bwei_handler
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.word eclic_pmovi_handler
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.word WWDGT_IRQHandler
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.word LVD_IRQHandler
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.word TAMPER_IRQHandler
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.word RTC_IRQHandler
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.word FMC_IRQHandler
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.word RCU_IRQHandler
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.word EXTI0_IRQHandler
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.word EXTI1_IRQHandler
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.word EXTI2_IRQHandler
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.word EXTI3_IRQHandler
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.word EXTI4_IRQHandler
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.word DMA0_Channel0_IRQHandler
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.word DMA0_Channel1_IRQHandler
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.word DMA0_Channel2_IRQHandler
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.word DMA0_Channel3_IRQHandler
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.word DMA0_Channel4_IRQHandler
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.word DMA0_Channel5_IRQHandler
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.word DMA0_Channel6_IRQHandler
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.word ADC0_1_IRQHandler
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.word CAN0_TX_IRQHandler
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.word CAN0_RX0_IRQHandler
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.word CAN0_RX1_IRQHandler
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.word CAN0_EWMC_IRQHandler
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.word EXTI5_9_IRQHandler
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.word TIMER0_BRK_IRQHandler
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.word TIMER0_UP_IRQHandler
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.word TIMER0_TRG_CMT_IRQHandler
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.word TIMER0_Channel_IRQHandler
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.word TIMER1_IRQHandler
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.word TIMER2_IRQHandler
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.word TIMER3_IRQHandler
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.word I2C0_EV_IRQHandler
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.word I2C0_ER_IRQHandler
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.word I2C1_EV_IRQHandler
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.word I2C1_ER_IRQHandler
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.word SPI0_IRQHandler
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.word SPI1_IRQHandler
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.word USART0_IRQHandler
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.word USART1_IRQHandler
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.word USART2_IRQHandler
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.word EXTI10_15_IRQHandler
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.word RTC_Alarm_IRQHandler
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.word USBFS_WKUP_IRQHandler
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.word 0
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.word 0
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.word 0
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.word 0
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.word 0
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.word EXMC_IRQHandler
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.word 0
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.word TIMER4_IRQHandler
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.word SPI2_IRQHandler
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.word UART3_IRQHandler
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.word UART4_IRQHandler
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.word TIMER5_IRQHandler
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.word TIMER6_IRQHandler
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.word DMA1_Channel0_IRQHandler
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.word DMA1_Channel1_IRQHandler
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.word DMA1_Channel2_IRQHandler
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.word DMA1_Channel3_IRQHandler
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.word DMA1_Channel4_IRQHandler
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.word 0
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.word 0
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.word CAN1_TX_IRQHandler
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.word CAN1_RX0_IRQHandler
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.word CAN1_RX1_IRQHandler
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.word CAN1_EWMC_IRQHandler
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.word USBFS_IRQHandler
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