1 /* 2 * File : cpu.c 3 * This file is part of RT-Thread RTOS 4 * COPYRIGHT (C) 2010, RT-Thread Development Team 5 * 6 * The license and distribution terms for this file may be 7 * found in the file LICENSE in this distribution or at 8 * http://www.rt-thread.org/license/LICENSE 9 * 10 * Change Logs: 11 * Date Author Notes 12 * 2010-05-17 swkyer first version 13 */ 14 #ifndef __EXCEPTION_H__ 15 #define __EXCEPTION_H__ 16 17 18 /* 19 * important register numbers 20 */ 21 #define REG_EPC 37 22 #define REG_FP 72 23 #define REG_SP 29 24 25 /* 26 * Stack layout for the GDB exception handler 27 * Derived from the stack layout described in asm-mips/stackframe.h 28 * 29 * The first PTRSIZE*6 bytes are argument save space for C subroutines. 30 */ 31 #define NUMREGS 90 32 33 #define GDB_FR_REG0 (PTRSIZE*6) /* 0 */ 34 #define GDB_FR_REG1 ((GDB_FR_REG0) + LONGSIZE) /* 1 */ 35 #define GDB_FR_REG2 ((GDB_FR_REG1) + LONGSIZE) /* 2 */ 36 #define GDB_FR_REG3 ((GDB_FR_REG2) + LONGSIZE) /* 3 */ 37 #define GDB_FR_REG4 ((GDB_FR_REG3) + LONGSIZE) /* 4 */ 38 #define GDB_FR_REG5 ((GDB_FR_REG4) + LONGSIZE) /* 5 */ 39 #define GDB_FR_REG6 ((GDB_FR_REG5) + LONGSIZE) /* 6 */ 40 #define GDB_FR_REG7 ((GDB_FR_REG6) + LONGSIZE) /* 7 */ 41 #define GDB_FR_REG8 ((GDB_FR_REG7) + LONGSIZE) /* 8 */ 42 #define GDB_FR_REG9 ((GDB_FR_REG8) + LONGSIZE) /* 9 */ 43 #define GDB_FR_REG10 ((GDB_FR_REG9) + LONGSIZE) /* 10 */ 44 #define GDB_FR_REG11 ((GDB_FR_REG10) + LONGSIZE) /* 11 */ 45 #define GDB_FR_REG12 ((GDB_FR_REG11) + LONGSIZE) /* 12 */ 46 #define GDB_FR_REG13 ((GDB_FR_REG12) + LONGSIZE) /* 13 */ 47 #define GDB_FR_REG14 ((GDB_FR_REG13) + LONGSIZE) /* 14 */ 48 #define GDB_FR_REG15 ((GDB_FR_REG14) + LONGSIZE) /* 15 */ 49 #define GDB_FR_REG16 ((GDB_FR_REG15) + LONGSIZE) /* 16 */ 50 #define GDB_FR_REG17 ((GDB_FR_REG16) + LONGSIZE) /* 17 */ 51 #define GDB_FR_REG18 ((GDB_FR_REG17) + LONGSIZE) /* 18 */ 52 #define GDB_FR_REG19 ((GDB_FR_REG18) + LONGSIZE) /* 19 */ 53 #define GDB_FR_REG20 ((GDB_FR_REG19) + LONGSIZE) /* 20 */ 54 #define GDB_FR_REG21 ((GDB_FR_REG20) + LONGSIZE) /* 21 */ 55 #define GDB_FR_REG22 ((GDB_FR_REG21) + LONGSIZE) /* 22 */ 56 #define GDB_FR_REG23 ((GDB_FR_REG22) + LONGSIZE) /* 23 */ 57 #define GDB_FR_REG24 ((GDB_FR_REG23) + LONGSIZE) /* 24 */ 58 #define GDB_FR_REG25 ((GDB_FR_REG24) + LONGSIZE) /* 25 */ 59 #define GDB_FR_REG26 ((GDB_FR_REG25) + LONGSIZE) /* 26 */ 60 #define GDB_FR_REG27 ((GDB_FR_REG26) + LONGSIZE) /* 27 */ 61 #define GDB_FR_REG28 ((GDB_FR_REG27) + LONGSIZE) /* 28 */ 62 #define GDB_FR_REG29 ((GDB_FR_REG28) + LONGSIZE) /* 29 */ 63 #define GDB_FR_REG30 ((GDB_FR_REG29) + LONGSIZE) /* 30 */ 64 #define GDB_FR_REG31 ((GDB_FR_REG30) + LONGSIZE) /* 31 */ 65 66 /* 67 * Saved special registers 68 */ 69 #define GDB_FR_STATUS ((GDB_FR_REG31) + LONGSIZE) /* 32 */ 70 #define GDB_FR_LO ((GDB_FR_STATUS) + LONGSIZE) /* 33 */ 71 #define GDB_FR_HI ((GDB_FR_LO) + LONGSIZE) /* 34 */ 72 #define GDB_FR_BADVADDR ((GDB_FR_HI) + LONGSIZE) /* 35 */ 73 #define GDB_FR_CAUSE ((GDB_FR_BADVADDR) + LONGSIZE) /* 36 */ 74 #define GDB_FR_EPC ((GDB_FR_CAUSE) + LONGSIZE) /* 37 */ 75 76 ///* 77 // * Saved floating point registers 78 // */ 79 //#define GDB_FR_FPR0 ((GDB_FR_EPC) + LONGSIZE) /* 38 */ 80 //#define GDB_FR_FPR1 ((GDB_FR_FPR0) + LONGSIZE) /* 39 */ 81 //#define GDB_FR_FPR2 ((GDB_FR_FPR1) + LONGSIZE) /* 40 */ 82 //#define GDB_FR_FPR3 ((GDB_FR_FPR2) + LONGSIZE) /* 41 */ 83 //#define GDB_FR_FPR4 ((GDB_FR_FPR3) + LONGSIZE) /* 42 */ 84 //#define GDB_FR_FPR5 ((GDB_FR_FPR4) + LONGSIZE) /* 43 */ 85 //#define GDB_FR_FPR6 ((GDB_FR_FPR5) + LONGSIZE) /* 44 */ 86 //#define GDB_FR_FPR7 ((GDB_FR_FPR6) + LONGSIZE) /* 45 */ 87 //#define GDB_FR_FPR8 ((GDB_FR_FPR7) + LONGSIZE) /* 46 */ 88 //#define GDB_FR_FPR9 ((GDB_FR_FPR8) + LONGSIZE) /* 47 */ 89 //#define GDB_FR_FPR10 ((GDB_FR_FPR9) + LONGSIZE) /* 48 */ 90 //#define GDB_FR_FPR11 ((GDB_FR_FPR10) + LONGSIZE) /* 49 */ 91 //#define GDB_FR_FPR12 ((GDB_FR_FPR11) + LONGSIZE) /* 50 */ 92 //#define GDB_FR_FPR13 ((GDB_FR_FPR12) + LONGSIZE) /* 51 */ 93 //#define GDB_FR_FPR14 ((GDB_FR_FPR13) + LONGSIZE) /* 52 */ 94 //#define GDB_FR_FPR15 ((GDB_FR_FPR14) + LONGSIZE) /* 53 */ 95 //#define GDB_FR_FPR16 ((GDB_FR_FPR15) + LONGSIZE) /* 54 */ 96 //#define GDB_FR_FPR17 ((GDB_FR_FPR16) + LONGSIZE) /* 55 */ 97 //#define GDB_FR_FPR18 ((GDB_FR_FPR17) + LONGSIZE) /* 56 */ 98 //#define GDB_FR_FPR19 ((GDB_FR_FPR18) + LONGSIZE) /* 57 */ 99 //#define GDB_FR_FPR20 ((GDB_FR_FPR19) + LONGSIZE) /* 58 */ 100 //#define GDB_FR_FPR21 ((GDB_FR_FPR20) + LONGSIZE) /* 59 */ 101 //#define GDB_FR_FPR22 ((GDB_FR_FPR21) + LONGSIZE) /* 60 */ 102 //#define GDB_FR_FPR23 ((GDB_FR_FPR22) + LONGSIZE) /* 61 */ 103 //#define GDB_FR_FPR24 ((GDB_FR_FPR23) + LONGSIZE) /* 62 */ 104 //#define GDB_FR_FPR25 ((GDB_FR_FPR24) + LONGSIZE) /* 63 */ 105 //#define GDB_FR_FPR26 ((GDB_FR_FPR25) + LONGSIZE) /* 64 */ 106 //#define GDB_FR_FPR27 ((GDB_FR_FPR26) + LONGSIZE) /* 65 */ 107 //#define GDB_FR_FPR28 ((GDB_FR_FPR27) + LONGSIZE) /* 66 */ 108 //#define GDB_FR_FPR29 ((GDB_FR_FPR28) + LONGSIZE) /* 67 */ 109 //#define GDB_FR_FPR30 ((GDB_FR_FPR29) + LONGSIZE) /* 68 */ 110 //#define GDB_FR_FPR31 ((GDB_FR_FPR30) + LONGSIZE) /* 69 */ 111 // 112 //#define GDB_FR_FSR ((GDB_FR_FPR31) + LONGSIZE) /* 70 */ 113 //#define GDB_FR_FIR ((GDB_FR_FSR) + LONGSIZE) /* 71 */ 114 //#define GDB_FR_FRP ((GDB_FR_FIR) + LONGSIZE) /* 72 */ 115 // 116 //#define GDB_FR_DUMMY ((GDB_FR_FRP) + LONGSIZE) /* 73, unused ??? */ 117 // 118 ///* 119 // * Again, CP0 registers 120 // */ 121 //#define GDB_FR_CP0_INDEX ((GDB_FR_DUMMY) + LONGSIZE) /* 74 */ 122 #define GDB_FR_FRP ((GDB_FR_EPC) + LONGSIZE) /* 72 */ 123 #define GDB_FR_CP0_INDEX ((GDB_FR_FRP) + LONGSIZE) /* 74 */ 124 125 #define GDB_FR_CP0_RANDOM ((GDB_FR_CP0_INDEX) + LONGSIZE) /* 75 */ 126 #define GDB_FR_CP0_ENTRYLO0 ((GDB_FR_CP0_RANDOM) + LONGSIZE)/* 76 */ 127 #define GDB_FR_CP0_ENTRYLO1 ((GDB_FR_CP0_ENTRYLO0) + LONGSIZE)/* 77 */ 128 #define GDB_FR_CP0_CONTEXT ((GDB_FR_CP0_ENTRYLO1) + LONGSIZE)/* 78 */ 129 #define GDB_FR_CP0_PAGEMASK ((GDB_FR_CP0_CONTEXT) + LONGSIZE)/* 79 */ 130 #define GDB_FR_CP0_WIRED ((GDB_FR_CP0_PAGEMASK) + LONGSIZE)/* 80 */ 131 #define GDB_FR_CP0_REG7 ((GDB_FR_CP0_WIRED) + LONGSIZE) /* 81 */ 132 #define GDB_FR_CP0_REG8 ((GDB_FR_CP0_REG7) + LONGSIZE) /* 82 */ 133 #define GDB_FR_CP0_REG9 ((GDB_FR_CP0_REG8) + LONGSIZE) /* 83 */ 134 #define GDB_FR_CP0_ENTRYHI ((GDB_FR_CP0_REG9) + LONGSIZE) /* 84 */ 135 #define GDB_FR_CP0_REG11 ((GDB_FR_CP0_ENTRYHI) + LONGSIZE)/* 85 */ 136 #define GDB_FR_CP0_REG12 ((GDB_FR_CP0_REG11) + LONGSIZE) /* 86 */ 137 #define GDB_FR_CP0_REG13 ((GDB_FR_CP0_REG12) + LONGSIZE) /* 87 */ 138 #define GDB_FR_CP0_REG14 ((GDB_FR_CP0_REG13) + LONGSIZE) /* 88 */ 139 #define GDB_FR_CP0_PRID ((GDB_FR_CP0_REG14) + LONGSIZE) /* 89 */ 140 141 #define GDB_FR_SIZE ((((GDB_FR_CP0_PRID) + LONGSIZE) + (PTRSIZE-1)) & ~(PTRSIZE-1)) 142 143 /* 144 * This is the same as above, but for the high-level 145 * part of the INT stub. 146 */ 147 typedef struct pt_regs_s 148 { 149 /* Saved main processor registers. */ 150 rt_base_t regs[32]; 151 /* Saved special registers. */ 152 rt_base_t cp0_status; 153 rt_base_t hi; 154 rt_base_t lo; 155 rt_base_t cp0_badvaddr; 156 rt_base_t cp0_cause; 157 rt_base_t cp0_epc; 158 } pt_regs_t; 159 160 typedef void (* exception_func_t)(pt_regs_t *regs); 161 162 extern exception_func_t sys_exception_handlers[]; 163 exception_func_t rt_set_except_vector(int n, exception_func_t func); 164 void install_default_execpt_handle(void); 165 166 #endif /* end of __EXCEPTION_H__ */ 167