/* Copyright (c) 2009-2020 ARM Limited. All rights reserved. SPDX-License-Identifier: Apache-2.0 Licensed under the Apache License, Version 2.0 (the License); you may not use this file except in compliance with the License. You may obtain a copy of the License at www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an AS IS BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. NOTICE: This file has been modified by Nordic Semiconductor ASA. */ .syntax unified .arch armv6-m #ifdef __STARTUP_CONFIG #include "startup_config.h" #ifndef __STARTUP_CONFIG_STACK_ALIGNEMENT #define __STARTUP_CONFIG_STACK_ALIGNEMENT 3 #endif #endif .section .stack #if defined(__STARTUP_CONFIG) .align __STARTUP_CONFIG_STACK_ALIGNEMENT .equ Stack_Size, __STARTUP_CONFIG_STACK_SIZE #elif defined(__STACK_SIZE) .align 3 .equ Stack_Size, __STACK_SIZE #else .align 3 .equ Stack_Size, 2048 #endif .globl __StackTop .globl __StackLimit __StackLimit: .space Stack_Size .size __StackLimit, . - __StackLimit __StackTop: .size __StackTop, . - __StackTop .section .heap .align 3 #if defined(__STARTUP_CONFIG) .equ Heap_Size, __STARTUP_CONFIG_HEAP_SIZE #elif defined(__HEAP_SIZE) .equ Heap_Size, __HEAP_SIZE #else .equ Heap_Size, 2048 #endif .globl __HeapBase .globl __HeapLimit __HeapBase: .if Heap_Size .space Heap_Size .endif .size __HeapBase, . - __HeapBase __HeapLimit: .size __HeapLimit, . - __HeapLimit .section .isr_vector, "ax" .align 2 .globl __isr_vector __isr_vector: .long __StackTop /* Top of Stack */ .long Reset_Handler .long NMI_Handler .long HardFault_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 .long 0 /*Reserved */ .long 0 /*Reserved */ .long PendSV_Handler .long SysTick_Handler /* External Interrupts */ .long POWER_CLOCK_IRQHandler .long RADIO_IRQHandler .long UART0_IRQHandler .long SPI0_TWI0_IRQHandler .long SPI1_TWI1_IRQHandler .long 0 /*Reserved */ .long GPIOTE_IRQHandler .long ADC_IRQHandler .long TIMER0_IRQHandler .long TIMER1_IRQHandler .long TIMER2_IRQHandler .long RTC0_IRQHandler .long TEMP_IRQHandler .long RNG_IRQHandler .long ECB_IRQHandler .long CCM_AAR_IRQHandler .long WDT_IRQHandler .long RTC1_IRQHandler .long QDEC_IRQHandler .long LPCOMP_IRQHandler .long SWI0_IRQHandler .long SWI1_IRQHandler .long SWI2_IRQHandler .long SWI3_IRQHandler .long SWI4_IRQHandler .long SWI5_IRQHandler .long 0 /*Reserved */ .long 0 /*Reserved */ .long 0 /*Reserved */ .long 0 /*Reserved */ .long 0 /*Reserved */ .long 0 /*Reserved */ .size __isr_vector, . - __isr_vector /* Reset Handler */ .equ NRF_POWER_RAMON_ADDRESS, 0x40000524 .equ NRF_POWER_RAMONB_ADDRESS, 0x40000554 .equ NRF_POWER_RAMONx_RAMxON_ONMODE_Msk, 0x3 .text .thumb .thumb_func .align 1 .globl Reset_Handler .type Reset_Handler, %function Reset_Handler: MOVS R1, #NRF_POWER_RAMONx_RAMxON_ONMODE_Msk LDR R0, =NRF_POWER_RAMON_ADDRESS LDR R2, [R0] ORRS R2, R1 STR R2, [R0] LDR R0, =NRF_POWER_RAMONB_ADDRESS LDR R2, [R0] ORRS R2, R1 STR R2, [R0] /* Loop to copy data from read only memory to RAM. * The ranges of copy from/to are specified by following symbols: * __etext: LMA of start of the section to copy from. Usually end of text * __data_start__: VMA of start of the section to copy to. * __bss_start__: VMA of end of the section to copy to. Normally __data_end__ is used, but by using __bss_start__ * the user can add their own initialized data section before BSS section with the INSERT AFTER command. * * All addresses must be aligned to 4 bytes boundary. */ #ifndef __STARTUP_SKIP_ETEXT ldr r1, =__etext ldr r2, =__data_start__ ldr r3, =__bss_start__ subs r3, r3, r2 ble .L_loop1_done .L_loop1: subs r3, r3, #4 ldr r0, [r1,r3] str r0, [r2,r3] bgt .L_loop1 .L_loop1_done: #endif /* This part of work usually is done in C library startup code. Otherwise, * define __STARTUP_CLEAR_BSS to enable it in this startup. This section * clears the RAM where BSS data is located. * * The BSS section is specified by following symbols * __bss_start__: start of the BSS section. * __bss_end__: end of the BSS section. * * All addresses must be aligned to 4 bytes boundary. */ #ifdef __STARTUP_CLEAR_BSS ldr r1, =__bss_start__ ldr r2, =__bss_end__ movs r0, 0 subs r2, r2, r1 ble .L_loop3_done .L_loop3: subs r2, r2, #4 str r0, [r1, r2] bgt .L_loop3 .L_loop3_done: #endif /* __STARTUP_CLEAR_BSS */ /* Execute SystemInit function. */ bl SystemInit /* Call _start function provided by libraries. * If those libraries are not accessible, define __START as your entry point. */ #ifndef __START #define __START _start #endif bl __START .pool .size Reset_Handler,.-Reset_Handler .section ".text" /* Dummy Exception Handlers (infinite loops which can be modified) */ .weak NMI_Handler .type NMI_Handler, %function NMI_Handler: b . .size NMI_Handler, . - NMI_Handler .weak HardFault_Handler .type HardFault_Handler, %function HardFault_Handler: b . .size HardFault_Handler, . - HardFault_Handler .weak SVC_Handler .type SVC_Handler, %function SVC_Handler: b . .size SVC_Handler, . - SVC_Handler .weak PendSV_Handler .type PendSV_Handler, %function PendSV_Handler: b . .size PendSV_Handler, . - PendSV_Handler .weak SysTick_Handler .type SysTick_Handler, %function SysTick_Handler: b . .size SysTick_Handler, . - SysTick_Handler /* IRQ Handlers */ .globl Default_Handler .type Default_Handler, %function Default_Handler: b . .size Default_Handler, . - Default_Handler .macro IRQ handler .weak \handler .set \handler, Default_Handler .endm IRQ POWER_CLOCK_IRQHandler IRQ RADIO_IRQHandler IRQ UART0_IRQHandler IRQ SPI0_TWI0_IRQHandler IRQ SPI1_TWI1_IRQHandler IRQ GPIOTE_IRQHandler IRQ ADC_IRQHandler IRQ TIMER0_IRQHandler IRQ TIMER1_IRQHandler IRQ TIMER2_IRQHandler IRQ RTC0_IRQHandler IRQ TEMP_IRQHandler IRQ RNG_IRQHandler IRQ ECB_IRQHandler IRQ CCM_AAR_IRQHandler IRQ WDT_IRQHandler IRQ RTC1_IRQHandler IRQ QDEC_IRQHandler IRQ LPCOMP_IRQHandler IRQ SWI0_IRQHandler IRQ SWI1_IRQHandler IRQ SWI2_IRQHandler IRQ SWI3_IRQHandler IRQ SWI4_IRQHandler IRQ SWI5_IRQHandler .end