/* File: startup_ARMCM3.s * Purpose: startup file for Cortex-M3/M4 devices. Should use with * GNU Tools for ARM Embedded Processors * Version: V1.1 * Date: 17 June 2011 * * Copyright (C) 2011 ARM Limited. All rights reserved. * ARM Limited (ARM) is supplying this software for use with Cortex-M3/M4 * processor based microcontrollers. This file can be freely distributed * within development tools that are supporting such ARM based processors. * * THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. * ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR * CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER. */ .syntax unified .arch armv7-m /* Memory Model The HEAP starts at the end of the DATA section and grows upward. The STACK starts at the end of the RAM and grows downward. The HEAP and stack STACK are only checked at compile time: (DATA_SIZE + HEAP_SIZE + STACK_SIZE) < RAM_SIZE This is just a check for the bare minimum for the Heap+Stack area before aborting compilation, it is not the run time limit: Heap_Size + Stack_Size = 0x80 + 0x80 = 0x100 */ .section .stack .align 3 #ifdef __STACK_SIZE .equ Stack_Size, __STACK_SIZE #else .equ Stack_Size, 0xc00 #endif .globl __StackTop .globl __StackLimit __StackLimit: .space Stack_Size .size __StackLimit, . - __StackLimit __StackTop: .size __StackTop, . - __StackTop .section .heap .align 3 #ifdef __HEAP_SIZE .equ Heap_Size, __HEAP_SIZE #else .equ Heap_Size, 0x800 #endif .globl __HeapBase .globl __HeapLimit __HeapBase: .space Heap_Size .size __HeapBase, . - __HeapBase __HeapLimit: .size __HeapLimit, . - __HeapLimit .section .isr_vector .align 2 .globl __isr_vector __isr_vector: .long __StackTop /* Top of Stack */ .long Reset_Handler /* Reset Handler */ .long NMI_Handler /* NMI Handler */ .long HardFault_Handler /* Hard Fault Handler */ .long MemManage_Handler /* MPU Fault Handler */ .long BusFault_Handler /* Bus Fault Handler */ .long UsageFault_Handler /* Usage Fault Handler */ .long 0 /* Reserved */ .long 0 /* Reserved */ .long 0 /* Reserved */ .long 0 /* Reserved */ .long SVC_Handler /* SVCall Handler */ .long DebugMon_Handler /* Debug Monitor Handler */ .long 0 /* Reserved */ .long PendSV_Handler /* PendSV Handler */ .long SysTick_Handler /* SysTick Handler */ .long PIN_INT0_Handler /* All GPIO pin can be routed to PIN_INTx */ .long PIN_INT1_Handler .long PIN_INT2_Handler .long PIN_INT3_Handler .long PIN_INT4_Handler .long PIN_INT5_Handler .long PIN_INT6_Handler .long PIN_INT7_Handler .long GINT0_Handler .long GINT1_Handler /* PIO0 (0:7) */ .long 0 .long 0 .long OSTIMER_Handler .long 0 .long SSP1_Handler /* SSP1 */ .long I2C_Handler /* I2C */ .long CT16B0_Handler /* 16-bit Timer0 */ .long CT16B1_Handler /* 16-bit Timer1 */ .long CT32B0_Handler /* 32-bit Timer0 */ .long CT32B1_Handler /* 32-bit Timer1 */ .long SSP0_Handler /* SSP0 */ .long USART_Handler /* USART */ .long USB_Handler /* USB IRQ */ .long USB_FIQHandler /* USB FIQ */ .long ADC_Handler /* A/D Converter */ .long WDT_Handler /* Watchdog timer */ .long BOD_Handler /* Brown Out Detect */ .long FMC_Handler /* IP2111 Flash Memory Controller */ .long OSCFAIL_Handler /* OSC FAIL */ .long PVTCIRCUIT_Handler /* PVT CIRCUIT */ .long USBWakeup_Handler /* USB wake up */ .long 0 .size __isr_vector, . - __isr_vector .text .thumb .thumb_func .align 2 .globl Reset_Handler .type Reset_Handler, %function Reset_Handler: /* Loop to copy data from read only memory to RAM. The ranges * of copy from/to are specified by following symbols evaluated in * linker script. * _etext: End of code section, i.e., begin of data sections to copy from. * __data_start__/__data_end__: RAM address range that data should be * copied to. Both must be aligned to 4 bytes boundary. */ ldr r1, =__etext ldr r2, =__data_start__ ldr r3, =__data_end__ .Lflash_to_ram_loop: cmp r2, r3 ittt lt ldrlt r0, [r1], #4 strlt r0, [r2], #4 blt .Lflash_to_ram_loop ldr r0, =SystemInit blx r0 ldr r0, =_start bx r0 .pool .size Reset_Handler, . - Reset_Handler .text /* Macro to define default handlers. Default handler * will be weak symbol and just dead loops. They can be * overwritten by other handlers */ .macro def_default_handler handler_name .align 1 .thumb_func .weak \handler_name .type \handler_name, %function \handler_name : b . .size \handler_name, . - \handler_name .endm def_default_handler NMI_Handler def_default_handler HardFault_Handler def_default_handler MemManage_Handler def_default_handler BusFault_Handler def_default_handler UsageFault_Handler def_default_handler SVC_Handler def_default_handler DebugMon_Handler def_default_handler PendSV_Handler def_default_handler SysTick_Handler def_default_handler Default_Handler .macro def_irq_default_handler handler_name .weak \handler_name .set \handler_name, Default_Handler .endm def_irq_default_handler PIN_INT0_Handler def_irq_default_handler PIN_INT1_Handler def_irq_default_handler PIN_INT2_Handler def_irq_default_handler PIN_INT3_Handler def_irq_default_handler PIN_INT4_Handler def_irq_default_handler PIN_INT5_Handler def_irq_default_handler PIN_INT6_Handler def_irq_default_handler PIN_INT7_Handler def_irq_default_handler GINT0_Handler def_irq_default_handler GINT1_Handler def_irq_default_handler OSTIMER_Handler def_irq_default_handler SSP1_Handler def_irq_default_handler I2C_Handler def_irq_default_handler CT16B0_Handler def_irq_default_handler CT16B1_Handler def_irq_default_handler CT32B0_Handler def_irq_default_handler CT32B1_Handler def_irq_default_handler SSP0_Handler def_irq_default_handler USART_Handler def_irq_default_handler USB_Handler def_irq_default_handler USB_FIQHandler def_irq_default_handler ADC_Handler def_irq_default_handler WDT_Handler def_irq_default_handler BOD_Handler def_irq_default_handler FMC_Handler def_irq_default_handler OSCFAIL_Handler def_irq_default_handler PVTCIRCUIT_Handler def_irq_default_handler USBWakeup_Handler def_irq_default_handler DEF_IRQHandler .end