1 /* 2 * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include "rk3399_mcu.h" 8 9 /* Stack configuration */ 10 #define STACK_SIZE 0x00000100 11 __attribute__ ((section(".co_stack"))) 12 unsigned long pstack[STACK_SIZE]; 13 14 /* Macro definition */ 15 #define WEAK __attribute__ ((weak)) 16 17 /* System exception vector handler */ 18 __attribute__ ((used)) 19 void WEAK reset_handler(void); 20 void WEAK nmi_handler(void); 21 void WEAK hardware_fault_handler(void); 22 void WEAK svc_handler(void); 23 void WEAK pend_sv_handler(void); 24 void WEAK systick_handler(void); 25 26 extern int main(void); 27 28 /* Function prototypes */ 29 static void default_reset_handler(void); 30 static void default_handler(void); 31 32 /* 33 * The minimal vector table for a Cortex M3. Note that the proper constructs 34 * must be placed on this to ensure that it ends up at physical address 35 * 0x00000000. 36 */ 37 __attribute__ ((used, section(".isr_vector"))) 38 void (* const g_pfnVectors[])(void) = { 39 /* core Exceptions */ 40 (void *)&pstack[STACK_SIZE], /* the initial stack pointer */ 41 reset_handler, 42 nmi_handler, 43 hardware_fault_handler, 44 0, 0, 0, 0, 0, 0, 0, 45 svc_handler, 46 0, 0, 47 pend_sv_handler, 48 systick_handler, 49 50 /* external exceptions */ 51 0, 0, 0, 0, 0, 0, 0, 52 0, 0, 0, 0, 0, 0, 0, 53 0, 0, 0, 0, 0, 0, 0, 54 0, 0, 0, 0, 0, 0, 0, 55 0, 0, 0, 0 56 }; 57 58 /** 59 * This is the code that gets called when the processor first 60 * starts execution following a reset event. Only the absolutely 61 * necessary set is performed, after which the application 62 * supplied main() routine is called. 63 */ 64 static void default_reset_handler(void) 65 { 66 /* call the application's entry point */ 67 main(); 68 } 69 70 /** 71 * Provide weak aliases for each Exception handler to the Default_Handler. 72 * As they are weak aliases, any function with the same name will override 73 * this definition. 74 */ 75 #pragma weak reset_handler = default_reset_handler 76 #pragma weak nmi_handler = default_handler 77 #pragma weak hardware_fault_handler = default_handler 78 #pragma weak svc_handler = default_handler 79 #pragma weak pend_sv_handler = default_handler 80 #pragma weak systick_handler = default_handler 81 82 /** 83 * This is the code that gets called when the processor receives 84 * an unexpected interrupt. This simply enters an infinite loop, 85 * preserving the system state for examination by a debugger. 86 */ 87 static void default_handler(void) 88 { 89 /* go into an infinite loop. */ 90 while (1) 91 ; 92 } 93
