/* KL25Z startup ARM GCC * Purpose: startup file for Cortex-M0 devices. Should use with * GCC for ARM Embedded Processors * Version: V1.2 * Date: 15 Nov 2011 * * Copyright (c) 2011, ARM Limited * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the ARM Limited nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL ARM LIMITED BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ .syntax unified .arch armv6-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, 0x80 #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, 0x80 #endif .globl __HeapBase .globl __HeapLimit __HeapBase: .space Heap_Size .size __HeapBase, . - __HeapBase __HeapLimit: .size __HeapLimit, . - __HeapLimit .section .vector_table,"a",%progbits .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 0 /* Reserved */ .long 0 /* Reserved */ .long 0 /* Reserved */ .long 0 /* Reserved */ .long 0 /* Reserved */ .long 0 /* Reserved */ .long 0 /* Reserved */ .long SVC_Handler /* SVCall Handler */ .long 0 /* Reserved */ .long 0 /* Reserved */ .long PendSV_Handler /* PendSV Handler */ .long SysTick_Handler /* SysTick Handler */ /* External interrupts */ .long DMA0_IRQHandler /* DMA channel 0 transfer complete interrupt */ .long DMA1_IRQHandler /* DMA channel 1 transfer complete interrupt */ .long DMA2_IRQHandler /* DMA channel 2 transfer complete interrupt */ .long DMA3_IRQHandler /* DMA channel 3 transfer complete interrupt */ .long Default_Handler /* Reserved interrupt 20 */ .long FTFA_IRQHandler /* FTFA interrupt */ .long LVD_LVW_IRQHandler /* Low Voltage Detect, Low Voltage Warning */ .long LLW_IRQHandler /* Low Leakage Wakeup */ .long I2C0_IRQHandler /* I2C0 interrupt */ .long I2C1_IRQHandler /* I2C0 interrupt 25 */ .long SPI0_IRQHandler /* SPI0 interrupt */ .long SPI1_IRQHandler /* SPI1 interrupt */ .long UART0_IRQHandler /* UART0 status/error interrupt */ .long UART1_IRQHandler /* UART1 status/error interrupt */ .long UART2_IRQHandler /* UART2 status/error interrupt */ .long ADC0_IRQHandler /* ADC0 interrupt */ .long CMP0_IRQHandler /* CMP0 interrupt */ .long TPM0_IRQHandler /* TPM0 fault, overflow and channels interrupt */ .long TPM1_IRQHandler /* TPM1 fault, overflow and channels interrupt */ .long TPM2_IRQHandler /* TPM2 fault, overflow and channels interrupt */ .long RTC_IRQHandler /* RTC interrupt */ .long RTC_Seconds_IRQHandler /* RTC seconds interrupt */ .long PIT_IRQHandler /* PIT timer interrupt */ .long Default_Handler /* Reserved interrupt 39 */ .long USB0_IRQHandler /* USB0 interrupt */ .long DAC0_IRQHandler /* DAC interrupt */ .long TSI0_IRQHandler /* TSI0 interrupt */ .long MCG_IRQHandler /* MCG interrupt */ .long LPTimer_IRQHandler /* LPTimer interrupt */ .long Default_Handler /* Reserved interrupt 45 */ .long PORTA_IRQHandler /* Port A interrupt */ .long PORTD_IRQHandler /* Port D interrupt */ .size __isr_vector, . - __isr_vector .section .text.Reset_Handler .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__ subs r3, r2 ble .Lflash_to_ram_loop_end movs r4, 0 .Lflash_to_ram_loop: ldr r0, [r1,r4] str r0, [r2,r4] adds r4, 4 cmp r4, r3 blt .Lflash_to_ram_loop .Lflash_to_ram_loop_end: 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 SVC_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 DMA0_IRQHandler def_irq_default_handler DMA1_IRQHandler def_irq_default_handler DMA2_IRQHandler def_irq_default_handler DMA3_IRQHandler def_irq_default_handler FTFA_IRQHandler def_irq_default_handler LVD_LVW_IRQHandler def_irq_default_handler LLW_IRQHandler def_irq_default_handler I2C0_IRQHandler def_irq_default_handler I2C1_IRQHandler def_irq_default_handler SPI0_IRQHandler def_irq_default_handler SPI1_IRQHandler def_irq_default_handler UART0_IRQHandler def_irq_default_handler UART1_IRQHandler def_irq_default_handler UART2_IRQHandler def_irq_default_handler ADC0_IRQHandler def_irq_default_handler CMP0_IRQHandler def_irq_default_handler TPM0_IRQHandler def_irq_default_handler TPM1_IRQHandler def_irq_default_handler TPM2_IRQHandler def_irq_default_handler RTC_IRQHandler def_irq_default_handler RTC_Seconds_IRQHandler def_irq_default_handler PIT_IRQHandler def_irq_default_handler USB0_IRQHandler def_irq_default_handler DAC0_IRQHandler def_irq_default_handler TSI0_IRQHandler def_irq_default_handler MCG_IRQHandler def_irq_default_handler LPTimer_IRQHandler def_irq_default_handler PORTA_IRQHandler def_irq_default_handler PORTD_IRQHandler def_irq_default_handler DEF_IRQHandler /* Flash protection region, placed at 0x400 */ .text .thumb .align 2 .section .kinetis_flash_config_field,"a",%progbits kinetis_flash_config: .long 0xffffffff .long 0xffffffff .long 0xffffffff .long 0xfffffffe .end