1 /* 2 * Copyright (c) 2006-2018, RT-Thread Development Team 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 * 6 * Change Logs: 7 * Date Author Notes 8 * 2006-03-13 Bernard first version 9 * 2006-05-27 Bernard add skyeye support 10 * 2007-11-19 Yi.Qiu fix rt_hw_trap_irq function 11 * 2013-03-29 aozima Modify the interrupt interface implementations. 12 */ 13 14 #include <rtthread.h> 15 #include <rthw.h> 16 17 #include <sep4020.h> 18 19 /** 20 * @addtogroup S3C24X0 21 */ 22 /*@{*/ 23 24 extern struct rt_thread *rt_current_thread; 25 26 /** 27 * this function will show registers of CPU 28 * 29 * @param regs the registers point 30 */ 31 32 void rt_hw_show_register (struct rt_hw_register *regs) 33 { 34 rt_kprintf("Execption:\n"); 35 rt_kprintf("r00:0x%08x r01:0x%08x r02:0x%08x r03:0x%08x\n", regs->r0, regs->r1, regs->r2, regs->r3); 36 rt_kprintf("r04:0x%08x r05:0x%08x r06:0x%08x r07:0x%08x\n", regs->r4, regs->r5, regs->r6, regs->r7); 37 rt_kprintf("r08:0x%08x r09:0x%08x r10:0x%08x\n", regs->r8, regs->r9, regs->r10); 38 rt_kprintf("fp :0x%08x ip :0x%08x\n", regs->fp, regs->ip); 39 rt_kprintf("sp :0x%08x lr :0x%08x pc :0x%08x\n", regs->sp, regs->lr, regs->pc); 40 rt_kprintf("cpsr:0x%08x\n", regs->cpsr); 41 } 42 43 /** 44 * When ARM7TDMI comes across an instruction which it cannot handle, 45 * it takes the undefined instruction trap. 46 * 47 * @param regs system registers 48 * 49 * @note never invoke this function in application 50 */ 51 void rt_hw_trap_udef(struct rt_hw_register *regs) 52 { 53 rt_hw_show_register(regs); 54 55 rt_kprintf("undefined instruction\n"); 56 rt_kprintf("thread - %s stack:\n", rt_current_thread->name); 57 rt_hw_backtrace((rt_uint32_t *)regs->fp, (rt_uint32_t)rt_current_thread->entry); 58 59 rt_hw_cpu_shutdown(); 60 } 61 62 /** 63 * The software interrupt instruction (SWI) is used for entering 64 * Supervisor mode, usually to request a particular supervisor 65 * function. 66 * 67 * @param regs system registers 68 * 69 * @note never invoke this function in application 70 */ 71 void rt_hw_trap_swi(struct rt_hw_register *regs) 72 { 73 rt_hw_show_register(regs); 74 75 rt_kprintf("software interrupt\n"); 76 rt_hw_cpu_shutdown(); 77 } 78 79 /** 80 * An abort indicates that the current memory access cannot be completed, 81 * which occurs during an instruction prefetch. 82 * 83 * @param regs system registers 84 * 85 * @note never invoke this function in application 86 */ 87 void rt_hw_trap_pabt(struct rt_hw_register *regs) 88 { 89 rt_hw_show_register(regs); 90 91 rt_kprintf("prefetch abort\n"); 92 rt_kprintf("thread - %s stack:\n", rt_current_thread->name); 93 rt_hw_backtrace((rt_uint32_t *)regs->fp, (rt_uint32_t)rt_current_thread->entry); 94 95 rt_hw_cpu_shutdown(); 96 } 97 98 /** 99 * An abort indicates that the current memory access cannot be completed, 100 * which occurs during a data access. 101 * 102 * @param regs system registers 103 * 104 * @note never invoke this function in application 105 */ 106 void rt_hw_trap_dabt(struct rt_hw_register *regs) 107 { 108 rt_hw_show_register(regs); 109 110 rt_kprintf("data abort\n"); 111 rt_kprintf("thread - %s stack:\n", rt_current_thread->name); 112 rt_hw_backtrace((rt_uint32_t *)regs->fp, (rt_uint32_t)rt_current_thread->entry); 113 114 rt_hw_cpu_shutdown(); 115 } 116 117 /** 118 * Normally, system will never reach here 119 * 120 * @param regs system registers 121 * 122 * @note never invoke this function in application 123 */ 124 void rt_hw_trap_resv(struct rt_hw_register *regs) 125 { 126 rt_kprintf("not used\n"); 127 rt_hw_show_register(regs); 128 rt_hw_cpu_shutdown(); 129 } 130 131 extern struct rt_irq_desc isr_table[]; 132 133 void rt_hw_trap_irq(void) 134 { 135 unsigned long intstat; 136 rt_uint32_t irq = 0; 137 rt_isr_handler_t isr_func; 138 void *param; 139 140 /*Get the final intrrupt source*/ 141 intstat = *(RP)(INTC_IFSR);; 142 143 /*Shift to get the intrrupt number*/ 144 while(intstat != 1) 145 { 146 intstat = intstat >> 1; 147 irq++; 148 } 149 150 /* get interrupt service routine */ 151 isr_func = isr_table[irq].handler; 152 param = isr_table[irq].param; 153 154 /* turn to interrupt service routine */ 155 isr_func(irq, param); 156 157 #ifdef RT_USING_INTERRUPT_INFO 158 isr_table[irq].counter++; 159 #endif /* RT_USING_INTERRUPT_INFO */ 160 } 161 162 void rt_hw_trap_fiq(void) 163 { 164 rt_kprintf("fast interrupt request\n"); 165 } 166 167 /*@}*/ 168