/* * File : start_gcc.S * This file is part of RT-Thread RTOS * COPYRIGHT (C) 2011, RT-Thread Development Team * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.rt-thread.org/license/LICENSE * * Change Logs: * Date Author Notes * 2011-07-01 lgnq first version */ .section .bss.init .equ Stack_Size, 0x00000200 .space Stack_Size Initial_spTop: .syntax unified .cpu cortex-m3 .fpu softvfp .thumb .global g_pfnVectors .global Default_Handler /* start address for the initialization values of the .data section. defined in linker script */ .word _sidata /* start address for the .data section. defined in linker script */ .word _sdata /* end address for the .data section. defined in linker script */ .word _edata /* start address for the .bss section. defined in linker script */ .word _sbss /* end address for the .bss section. defined in linker script */ .word _ebss // .equ Initial_spTop, 0x20000200 .equ BootRAM, 0xF1E0F85F /** * @brief This is the code that gets called when the processor first * starts execution following a reset event. Only the absolutely * necessary set is performed, after which the application * supplied main() routine is called. * @param None * @retval : None */ .section .text.Reset_Handler .weak Reset_Handler .type Reset_Handler, %function Reset_Handler: /* restore original stack pointer */ LDR r0, =Initial_spTop MSR msp, r0 /* Copy the data segment initializers from flash to SRAM */ movs r1, #0 b LoopCopyDataInit CopyDataInit: ldr r3, =_sidata ldr r3, [r3, r1] str r3, [r0, r1] adds r1, r1, #4 LoopCopyDataInit: ldr r0, =_sdata ldr r3, =_edata adds r2, r0, r1 cmp r2, r3 bcc CopyDataInit ldr r2, =_sbss b LoopFillZerobss /* Zero fill the bss segment. */ FillZerobss: movs r3, #0 str r3, [r2], #4 LoopFillZerobss: ldr r3, = _ebss cmp r2, r3 bcc FillZerobss /* Call the application's entry point.*/ bl main bx lr .size Reset_Handler, .-Reset_Handler /** * @brief This is the code that gets called when the processor receives an * unexpected interrupt. This simply enters an infinite loop, preserving * the system state for examination by a debugger. * * @param None * @retval : None */ .section .text.Default_Handler,"ax",%progbits Default_Handler: Infinite_Loop: b Infinite_Loop .size Default_Handler, .-Default_Handler /****************************************************************************** * * The minimal vector table for a Cortex M3. Note that the proper constructs * must be placed on this to ensure that it ends up at physical address * 0x0000.0000. * ******************************************************************************/ .section .isr_vector,"a",%progbits .type g_pfnVectors, %object .size g_pfnVectors, .-g_pfnVectors g_pfnVectors: .word Initial_spTop .word Reset_Handler .word NMI_Handler .word HardFault_Handler .word MemManage_Handler .word BusFault_Handler .word UsageFault_Handler .word 0 .word 0 .word 0 .word 0 .word SVC_Handler .word DebugMon_Handler .word 0 .word PendSV_Handler .word SysTick_Handler .word CSV_IRQHandler .word SWDT_IRQHandler .word LVD_IRQHandler .word WFG_IRQHandler .word EXINT0_7_IRQHandler .word EXINT8_15_IRQHandler .word DTIM_QDU_IRQHandler .word MFS0RX_IRQHandler .word MFS0TX_IRQHandler .word MFS1RX_IRQHandler .word MFS1TX_IRQHandler .word MFS2RX_IRQHandler .word MFS2TX_IRQHandler .word MFS3RX_IRQHandler .word MFS3TX_IRQHandler .word MFS4RX_IRQHandler .word MFS4TX_IRQHandler .word MFS5RX_IRQHandler .word MFS5TX_IRQHandler .word MFS6RX_IRQHandler .word MFS6TX_IRQHandler .word MFS7RX_IRQHandler .word MFS7TX_IRQHandler .word PPG_IRQHandler .word OSC_PLL_WC_IRQHandler .word ADC0_IRQHandler .word ADC1_IRQHandler .word ADC2_IRQHandler .word FRTIM_IRQHandler .word INCAP_IRQHandler .word OUTCOMP_IRQHandler .word BTIM_IRQHandler .word CAN0_IRQHandler .word CAN1_IRQHandler .word USBF_IRQHandler .word USBF_USBH_IRQHandler .word RESERVED_1_IRQHandler .word RESERVED_2_IRQHandler .word DMAC0_IRQHandler .word DMAC1_IRQHandler .word DMAC2_IRQHandler .word DMAC3_IRQHandler .word DMAC4_IRQHandler .word DMAC5_IRQHandler .word DMAC6_IRQHandler .word DMAC7_IRQHandler .word RESERVED_3_IRQHandler .word RESERVED_4_IRQHandler /******************************************************************************* * * Provide weak aliases for each Exception handler to the Default_Handler. * As they are weak aliases, any function with the same name will override * this definition. * *******************************************************************************/ .weak NMI_Handler .thumb_set NMI_Handler,Default_Handler .weak HardFault_Handler .thumb_set HardFault_Handler,Default_Handler .weak MemManage_Handler .thumb_set MemManage_Handler,Default_Handler .weak BusFault_Handler .thumb_set BusFault_Handler,Default_Handler .weak UsageFault_Handler .thumb_set UsageFault_Handler,Default_Handler .weak SVC_Handler .thumb_set SVC_Handler,Default_Handler .weak DebugMon_Handler .thumb_set DebugMon_Handler,Default_Handler .weak PendSV_Handler .thumb_set PendSV_Handler,Default_Handler .weak SysTick_Handler .thumb_set SysTick_Handler,Default_Handler .weak CSV_IRQHandler .thumb_set CSV_IRQHandler,Default_Handler .weak SWDT_IRQHandler .thumb_set SWDT_IRQHandler,Default_Handler .weak LVD_IRQHandler .thumb_set LVD_IRQHandler,Default_Handler .weak WFG_IRQHandler .thumb_set WFG_IRQHandler,Default_Handler .weak EXINT0_7_IRQHandler .thumb_set EXINT0_7_IRQHandler,Default_Handler .weak EXINT8_15_IRQHandler .thumb_set EXINT8_15_IRQHandler,Default_Handler .weak DTIM_QDU_IRQHandler .thumb_set DTIM_QDU_IRQHandler,Default_Handler .weak MFS0RX_IRQHandler .thumb_set MFS0RX_IRQHandler,Default_Handler .weak MFS0TX_IRQHandler .thumb_set MFS0TX_IRQHandler,Default_Handler .weak MFS1RX_IRQHandler .thumb_set MFS1RX_IRQHandler,Default_Handler .weak MFS1TX_IRQHandler .thumb_set MFS1TX_IRQHandler,Default_Handler .weak MFS2RX_IRQHandler .thumb_set MFS2RX_IRQHandler,Default_Handler .weak MFS2TX_IRQHandler .thumb_set MFS2TX_IRQHandler,Default_Handler .weak MFS3RX_IRQHandler .thumb_set MFS3RX_IRQHandler,Default_Handler .weak MFS3TX_IRQHandler .thumb_set MFS3TX_IRQHandler,Default_Handler .weak MFS4RX_IRQHandler .thumb_set MFS4RX_IRQHandler,Default_Handler .weak MFS4TX_IRQHandler .thumb_set MFS4TX_IRQHandler,Default_Handler .weak MFS5RX_IRQHandler .thumb_set MFS5RX_IRQHandler,Default_Handler .weak MFS5TX_IRQHandler .thumb_set MFS5TX_IRQHandler,Default_Handler .weak MFS6RX_IRQHandler .thumb_set MFS6RX_IRQHandler,Default_Handler .weak MFS6TX_IRQHandler .thumb_set MFS6TX_IRQHandler,Default_Handler .weak MFS7RX_IRQHandler .thumb_set MFS7RX_IRQHandler,Default_Handler .weak MFS7TX_IRQHandler .thumb_set MFS7TX_IRQHandler,Default_Handler .weak PPG_IRQHandler .thumb_set PPG_IRQHandler,Default_Handler .weak OSC_PLL_WC_IRQHandler .thumb_set OSC_PLL_WC_IRQHandler,Default_Handler .weak ADC0_IRQHandler .thumb_set ADC0_IRQHandler,Default_Handler .weak ADC1_IRQHandler .thumb_set ADC1_IRQHandler,Default_Handler .weak ADC2_IRQHandler .thumb_set ADC2_IRQHandler,Default_Handler .weak FRTIM_IRQHandler .thumb_set FRTIM_IRQHandler,Default_Handler .weak INCAP_IRQHandler .thumb_set INCAP_IRQHandler,Default_Handler .weak OUTCOMP_IRQHandler .thumb_set OUTCOMP_IRQHandler,Default_Handler .weak BTIM_IRQHandler .thumb_set BTIM_IRQHandler,Default_Handler .weak CAN0_IRQHandler .thumb_set CAN0_IRQHandler,Default_Handler .weak CAN1_IRQHandler .thumb_set CAN1_IRQHandler,Default_Handler .weak USBF_IRQHandler .thumb_set USBF_IRQHandler,Default_Handler .weak USBF_USBH_IRQHandler .thumb_set USBF_USBH_IRQHandler,Default_Handler .weak RESERVED_1_IRQHandler .thumb_set RESERVED_1_IRQHandler,Default_Handler .weak RESERVED_2_IRQHandler .thumb_set RESERVED_2_IRQHandler,Default_Handler .weak DMAC0_IRQHandler .thumb_set DMAC0_IRQHandler,Default_Handler .weak DMAC1_IRQHandler .thumb_set DMAC1_IRQHandler,Default_Handler .weak DMAC2_IRQHandler .thumb_set DMAC2_IRQHandler,Default_Handler .weak DMAC3_IRQHandler .thumb_set DMAC3_IRQHandler,Default_Handler .weak DMAC4_IRQHandler .thumb_set DMAC4_IRQHandler,Default_Handler .weak DMAC5_IRQHandler .thumb_set DMAC5_IRQHandler,Default_Handler .weak DMAC6_IRQHandler .thumb_set DMAC6_IRQHandler,Default_Handler .weak DMAC7_IRQHandler .thumb_set DMAC7_IRQHandler,Default_Handler .weak RESERVED_3_IRQHandler .thumb_set RESERVED_3_IRQHandler,Default_Handler .weak RESERVED_4_IRQHandler .thumb_set RESERVED_4_IRQHandler,Default_Handler