1 /* 2 * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "rk3399_mcu.h" 32 33 /* Stack configuration */ 34 #define STACK_SIZE 0x00000100 35 __attribute__ ((section(".co_stack"))) 36 unsigned long pstack[STACK_SIZE]; 37 38 /* Macro definition */ 39 #define WEAK __attribute__ ((weak)) 40 41 /* System exception vector handler */ 42 __attribute__ ((used)) 43 void WEAK reset_handler(void); 44 void WEAK nmi_handler(void); 45 void WEAK hardware_fault_handler(void); 46 void WEAK svc_handler(void); 47 void WEAK pend_sv_handler(void); 48 void WEAK systick_handler(void); 49 50 extern int main(void); 51 52 /* Function prototypes */ 53 static void default_reset_handler(void); 54 static void default_handler(void); 55 56 /* 57 * The minimal vector table for a Cortex M3. Note that the proper constructs 58 * must be placed on this to ensure that it ends up at physical address 59 * 0x00000000. 60 */ 61 __attribute__ ((used, section(".isr_vector"))) 62 void (* const g_pfnVectors[])(void) = { 63 /* core Exceptions */ 64 (void *)&pstack[STACK_SIZE], /* the initial stack pointer */ 65 reset_handler, 66 nmi_handler, 67 hardware_fault_handler, 68 0, 0, 0, 0, 0, 0, 0, 69 svc_handler, 70 0, 0, 71 pend_sv_handler, 72 systick_handler, 73 74 /* external exceptions */ 75 0, 0, 0, 0, 0, 0, 0, 76 0, 0, 0, 0, 0, 0, 0, 77 0, 0, 0, 0, 0, 0, 0, 78 0, 0, 0, 0, 0, 0, 0, 79 0, 0, 0, 0 80 }; 81 82 /** 83 * This is the code that gets called when the processor first 84 * starts execution following a reset event. Only the absolutely 85 * necessary set is performed, after which the application 86 * supplied main() routine is called. 87 */ 88 static void default_reset_handler(void) 89 { 90 /* call the application's entry point */ 91 main(); 92 } 93 94 /** 95 * Provide weak aliases for each Exception handler to the Default_Handler. 96 * As they are weak aliases, any function with the same name will override 97 * this definition. 98 */ 99 #pragma weak reset_handler = default_reset_handler 100 #pragma weak nmi_handler = default_handler 101 #pragma weak hardware_fault_handler = default_handler 102 #pragma weak svc_handler = default_handler 103 #pragma weak pend_sv_handler = default_handler 104 #pragma weak systick_handler = default_handler 105 106 /** 107 * This is the code that gets called when the processor receives 108 * an unexpected interrupt. This simply enters an infinite loop, 109 * preserving the system state for examination by a debugger. 110 */ 111 static void default_handler(void) 112 { 113 /* go into an infinite loop. */ 114 while (1) 115 ; 116 } 117