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Diffstat (limited to 'FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Qemu_mps2/init/startup.c')
| -rw-r--r-- | FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Qemu_mps2/init/startup.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Qemu_mps2/init/startup.c b/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Qemu_mps2/init/startup.c new file mode 100644 index 000000000..6c588ddfa --- /dev/null +++ b/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Qemu_mps2/init/startup.c @@ -0,0 +1,203 @@ +/* + * FreeRTOS V202011.00 + * Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of + * this software and associated documentation files (the "Software"), to deal in + * the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of + * the Software, and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS + * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR + * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER + * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * https://www.FreeRTOS.org + * https://github.com/FreeRTOS + * + */ + +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include "CMSIS/CMSDK_CM3.h" +#include "CMSIS/core_cm3.h" + +extern void vPortSVCHandler( void ); +extern void xPortPendSVHandler( void ); +extern void xPortSysTickHandler( void ); +extern void uart_init(); +extern int main(); + +void __attribute__((weak)) EthernetISR (void); + +extern uint32_t _estack, _sidata, _sdata, _edata, _sbss, _ebss; + +__attribute__((naked)) void Reset_Handler(void) + { + // set stack pointer + __asm volatile ("ldr r0, =_estack"); + __asm volatile ("mov sp, r0"); + // copy .data section from flash to RAM + for (uint32_t *src = &_sidata, *dest = &_sdata; dest < &_edata;) + { + *dest++ = *src++; + } + + // zero out .bss section + for (uint32_t *dest = &_sbss; dest < &_ebss;) + { + *dest++ = 0; + } + // jump to board initialisation + void _start(void); + _start(); +} + +void prvGetRegistersFromStack( uint32_t *pulFaultStackAddress ) +{ +/* These are volatile to try and prevent the compiler/linker optimising them +away as the variables never actually get used. If the debugger won't show the +values of the variables, make them global my moving their declaration outside +of this function. */ + volatile uint32_t r0; + volatile uint32_t r1; + volatile uint32_t r2; + volatile uint32_t r3; + volatile uint32_t r12; + volatile uint32_t lr; /* Link register. */ + volatile uint32_t pc; /* Program counter. */ + volatile uint32_t psr;/* Program status register. */ + + r0 = pulFaultStackAddress[ 0 ]; + r1 = pulFaultStackAddress[ 1 ]; + r2 = pulFaultStackAddress[ 2 ]; + r3 = pulFaultStackAddress[ 3 ]; + + r12 = pulFaultStackAddress[ 4 ]; + lr = pulFaultStackAddress[ 5 ]; + pc = pulFaultStackAddress[ 6 ]; + psr = pulFaultStackAddress[ 7 ]; + + /* When the following line is hit, the variables contain the register values. */ + for( ;; ); +} + +static void Default_Handler( void ) __attribute__( ( naked ) ); +void Default_Handler(void) +{ + __asm volatile + ( + "Default_Handler: \n" + " ldr r3, NVIC_INT_CTRL_CONST \n" + " ldr r2, [r3, #0]\n" + " uxtb r2, r2\n" + "Infinite_Loop:\n" + " b Infinite_Loop\n" + ".size Default_Handler, .-Default_Handler\n" + ".align 4\n" + "NVIC_INT_CTRL_CONST: .word 0xe000ed04\n" + ); +} +static void HardFault_Handler( void ) __attribute__( ( naked ) ); +void Default_Handler2(void) +{ + + __asm volatile + ( + " tst lr, #4 \n" + " ite eq \n" + " mrseq r0, msp \n" + " mrsne r0, psp \n" + " ldr r1, [r0, #24] \n" + " ldr r2, handler2_address_const \n" + " bx r2 \n" + " handler2_address_const: .word prvGetRegistersFromStack \n" + ); +} + +void Default_Handler3(void) +{ + for (;;) { } +} + +void Default_Handler4(void) +{ + for (;;) { } +} + +void Default_Handler5(void) +{ + for (;;) { } +} + +void Default_Handler6(void) +{ + for (;;) { } +} + +const uint32_t* isr_vector[] __attribute__((section(".isr_vector"))) = +{ + (uint32_t*)&_estack, + (uint32_t*)&Reset_Handler, // Reset -15 + (uint32_t*)&Default_Handler, // NMI_Handler -14 + (uint32_t*)&Default_Handler2, // HardFault_Handler -13 + (uint32_t*)&Default_Handler3, // MemManage_Handler -12 + (uint32_t*)&Default_Handler4, // BusFault_Handler -11 + (uint32_t*)&Default_Handler5, // UsageFault_Handler -10 + 0, // reserved + 0, // reserved + 0, // reserved + 0, // reserved -6 + (uint32_t*)&vPortSVCHandler, // SVC_Handler -5 + (uint32_t*)&Default_Handler6, // DebugMon_Handler -4 + 0, // reserved + (uint32_t*)&xPortPendSVHandler, // PendSV handler -2 + (uint32_t*)&xPortSysTickHandler, // SysTick_Handler -1 + 0, // uart0 receive 0 + 0, // uart0 transmit + 0, // uart1 receive + 0, // uart1 transmit + 0, // uart 2 receive + 0, // uart 2 transmit + 0, // GPIO 0 combined interrupt + 0, // GPIO 2 combined interrupt + 0, // Timer 0 + 0, // Timer 1 + 0, // Dial Timer + 0, // SPI0 SPI1 + 0, // uart overflow 1, 2,3 + 0, // Ethernet 13 + +}; + +void _start(void) +{ + uart_init(); + main(0, 0); + exit(0); +} + +__attribute__((naked)) void exit(int status) +{ + // Force qemu to exit using ARM Semihosting + __asm volatile ( + "mov r1, r0\n" + "cmp r1, #0\n" + "bne .notclean\n" + "ldr r1, =0x20026\n" // ADP_Stopped_ApplicationExit, a clean exit + ".notclean:\n" + "movs r0, #0x18\n" // SYS_EXIT + "bkpt 0xab\n" + "end: b end\n" + ); +} + |