2017-06-17 16:19:42 -05:00
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/* File: startup_ARMCM3.s
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* Purpose: startup file for Cortex-M3/M4 devices. Should use with
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* GNU Tools for ARM Embedded Processors
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* Version: V1.1
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* Date: 17 June 2011
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*
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* Copyright (C) 2011 ARM Limited. All rights reserved.
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* ARM Limited (ARM) is supplying this software for use with Cortex-M3/M4
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* processor based microcontrollers. This file can be freely distributed
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* within development tools that are supporting such ARM based processors.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
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* OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
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* ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
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* CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
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*/
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.syntax unified
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.arch armv7-m
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/* Memory Model
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The HEAP starts at the end of the DATA section and grows upward.
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The STACK starts at the end of the RAM and grows downward.
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The HEAP and stack STACK are only checked at compile time:
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(DATA_SIZE + HEAP_SIZE + STACK_SIZE) < RAM_SIZE
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This is just a check for the bare minimum for the Heap+Stack area before
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aborting compilation, it is not the run time limit:
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Heap_Size + Stack_Size = 0x80 + 0x80 = 0x100
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*/
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.section .stack
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.align 3
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#ifdef __STACK_SIZE
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.equ Stack_Size, __STACK_SIZE
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#else
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.equ Stack_Size, 0xc00
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#endif
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.globl __StackTop
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.globl __StackLimit
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__StackLimit:
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.space Stack_Size
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.size __StackLimit, . - __StackLimit
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__StackTop:
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.size __StackTop, . - __StackTop
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.section .heap
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.align 3
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#ifdef __HEAP_SIZE
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.equ Heap_Size, __HEAP_SIZE
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#else
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.equ Heap_Size, 0x800
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#endif
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.globl __HeapBase
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.globl __HeapLimit
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__HeapBase:
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.space Heap_Size
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.size __HeapBase, . - __HeapBase
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__HeapLimit:
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.size __HeapLimit, . - __HeapLimit
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.section .isr_vector
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.align 2
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.globl __isr_vector
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__isr_vector:
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.long __StackTop /* Top of Stack */
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.long Reset_Handler /* Reset Handler */
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.long NMI_Handler /* NMI Handler */
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.long HardFault_Handler /* Hard Fault Handler */
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.long MemManage_Handler /* MPU Fault Handler */
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.long BusFault_Handler /* Bus Fault Handler */
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.long UsageFault_Handler /* Usage Fault Handler */
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.long 0 /* Reserved */
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.long 0 /* Reserved */
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.long 0 /* Reserved */
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.long 0 /* Reserved */
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.long SVC_Handler /* SVCall Handler */
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.long DebugMon_Handler /* Debug Monitor Handler */
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.long 0 /* Reserved */
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.long PendSV_Handler /* PendSV Handler */
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.long SysTick_Handler /* SysTick Handler */
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/* External interrupts */
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.long WDT_IRQHandler /* 16: Watchdog Timer */
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.long TIMER0_IRQHandler /* 17: Timer0 */
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.long TIMER1_IRQHandler /* 18: Timer1 */
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.long TIMER2_IRQHandler /* 19: Timer2 */
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.long TIMER3_IRQHandler /* 20: Timer3 */
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.long UART0_IRQHandler /* 21: UART0 */
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.long UART1_IRQHandler /* 22: UART1 */
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.long UART2_IRQHandler /* 23: UART2 */
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.long UART3_IRQHandler /* 24: UART3 */
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.long PWM1_IRQHandler /* 25: PWM1 */
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.long I2C0_IRQHandler /* 26: I2C0 */
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.long I2C1_IRQHandler /* 27: I2C1 */
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.long I2C2_IRQHandler /* 28: I2C2 */
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.long SPI_IRQHandler /* 29: SPI */
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.long SSP0_IRQHandler /* 30: SSP0 */
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.long SSP1_IRQHandler /* 31: SSP1 */
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.long PLL0_IRQHandler /* 32: PLL0 Lock (Main PLL) */
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.long RTC_IRQHandler /* 33: Real Time Clock */
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.long EINT0_IRQHandler /* 34: External Interrupt 0 */
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.long EINT1_IRQHandler /* 35: External Interrupt 1 */
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.long EINT2_IRQHandler /* 36: External Interrupt 2 */
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.long EINT3_IRQHandler /* 37: External Interrupt 3 */
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.long ADC_IRQHandler /* 38: A/D Converter */
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.long BOD_IRQHandler /* 39: Brown-Out Detect */
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.long USB_IRQHandler /* 40: USB */
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.long CAN_IRQHandler /* 41: CAN */
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.long DMA_IRQHandler /* 42: General Purpose DMA */
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.long I2S_IRQHandler /* 43: I2S */
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.long ENET_IRQHandler /* 44: Ethernet */
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.long RIT_IRQHandler /* 45: Repetitive Interrupt Timer */
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.long MCPWM_IRQHandler /* 46: Motor Control PWM */
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.long QEI_IRQHandler /* 47: Quadrature Encoder Interface */
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.long PLL1_IRQHandler /* 48: PLL1 Lock (USB PLL) */
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.long USBActivity_IRQHandler /* 49: USB Activity */
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.long CANActivity_IRQHandler /* 50: CAN Activity */
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.size __isr_vector, . - __isr_vector
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.text
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.thumb
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.thumb_func
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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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/* Loop to copy data from read only memory to RAM. The ranges
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* of copy from/to are specified by following symbols evaluated in
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* linker script.
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* _etext: End of code section, i.e., begin of data sections to copy from.
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* __data_start__/__data_end__: RAM address range that data should be
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* copied to. Both must be aligned to 4 bytes boundary. */
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ldr r1, =__etext
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ldr r2, =__data_start__
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ldr r3, =__data_end__
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.flash_to_ram_loop:
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cmp r2, r3
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ittt lt
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ldrlt r0, [r1], #4
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strlt r0, [r2], #4
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blt .flash_to_ram_loop
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ldr r0, =SystemInit
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blx r0
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ldr r0, =SystemPostInit
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blx r0
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ldr r0, =_start
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bx r0
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.pool
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.size Reset_Handler, . - Reset_Handler
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/* Macro to define default handlers. Default handler
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* will be weak symbol and just dead loops. They can be
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* overwritten by other handlers */
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.macro def_default_handler handler_name
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.align 1
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.thumb_func
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.weak \handler_name
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.type \handler_name, %function
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\handler_name :
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b .
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.size \handler_name, . - \handler_name
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.endm
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def_default_handler NMI_Handler
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def_default_handler HardFault_Handler
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def_default_handler MemManage_Handler
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def_default_handler BusFault_Handler
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def_default_handler UsageFault_Handler
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def_default_handler SVC_Handler
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def_default_handler DebugMon_Handler
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def_default_handler PendSV_Handler
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def_default_handler SysTick_Handler
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def_default_handler Default_Handler
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def_default_handler WDT_IRQHandler
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def_default_handler TIMER0_IRQHandler
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def_default_handler TIMER1_IRQHandler
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def_default_handler TIMER2_IRQHandler
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def_default_handler TIMER3_IRQHandler
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def_default_handler UART0_IRQHandler
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def_default_handler UART1_IRQHandler
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def_default_handler UART2_IRQHandler
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def_default_handler UART3_IRQHandler
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def_default_handler PWM1_IRQHandler
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def_default_handler I2C0_IRQHandler
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def_default_handler I2C1_IRQHandler
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def_default_handler I2C2_IRQHandler
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def_default_handler SPI_IRQHandler
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def_default_handler SSP0_IRQHandler
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def_default_handler SSP1_IRQHandler
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def_default_handler PLL0_IRQHandler
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def_default_handler RTC_IRQHandler
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def_default_handler EINT0_IRQHandler
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def_default_handler EINT1_IRQHandler
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def_default_handler EINT2_IRQHandler
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def_default_handler EINT3_IRQHandler
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def_default_handler ADC_IRQHandler
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def_default_handler BOD_IRQHandler
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def_default_handler USB_IRQHandler
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def_default_handler CAN_IRQHandler
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def_default_handler DMA_IRQHandler
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def_default_handler I2S_IRQHandler
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def_default_handler ENET_IRQHandler
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def_default_handler RIT_IRQHandler
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def_default_handler MCPWM_IRQHandler
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def_default_handler QEI_IRQHandler
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def_default_handler PLL1_IRQHandler
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def_default_handler USBActivity_IRQHandler
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def_default_handler CANActivity_IRQHandler
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.weak DEF_IRQHandler
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.set DEF_IRQHandler, Default_Handler
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.end
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