2013-01-08 21:05:02 +08:00
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/*
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* File : cpu.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2010, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2010-05-17 swkyer first version
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*/
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#ifndef __EXCEPTION_H__
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#define __EXCEPTION_H__
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/*
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* important register numbers
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*/
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#define REG_EPC 37
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#define REG_FP 72
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#define REG_SP 29
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/*
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* Stack layout for the GDB exception handler
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* Derived from the stack layout described in asm-mips/stackframe.h
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*
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* The first PTRSIZE*6 bytes are argument save space for C subroutines.
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*/
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#define NUMREGS 90
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#define GDB_FR_REG0 (PTRSIZE*6) /* 0 */
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#define GDB_FR_REG1 ((GDB_FR_REG0) + LONGSIZE) /* 1 */
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#define GDB_FR_REG2 ((GDB_FR_REG1) + LONGSIZE) /* 2 */
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#define GDB_FR_REG3 ((GDB_FR_REG2) + LONGSIZE) /* 3 */
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#define GDB_FR_REG4 ((GDB_FR_REG3) + LONGSIZE) /* 4 */
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#define GDB_FR_REG5 ((GDB_FR_REG4) + LONGSIZE) /* 5 */
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#define GDB_FR_REG6 ((GDB_FR_REG5) + LONGSIZE) /* 6 */
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#define GDB_FR_REG7 ((GDB_FR_REG6) + LONGSIZE) /* 7 */
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#define GDB_FR_REG8 ((GDB_FR_REG7) + LONGSIZE) /* 8 */
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#define GDB_FR_REG9 ((GDB_FR_REG8) + LONGSIZE) /* 9 */
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#define GDB_FR_REG10 ((GDB_FR_REG9) + LONGSIZE) /* 10 */
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#define GDB_FR_REG11 ((GDB_FR_REG10) + LONGSIZE) /* 11 */
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#define GDB_FR_REG12 ((GDB_FR_REG11) + LONGSIZE) /* 12 */
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#define GDB_FR_REG13 ((GDB_FR_REG12) + LONGSIZE) /* 13 */
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#define GDB_FR_REG14 ((GDB_FR_REG13) + LONGSIZE) /* 14 */
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#define GDB_FR_REG15 ((GDB_FR_REG14) + LONGSIZE) /* 15 */
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#define GDB_FR_REG16 ((GDB_FR_REG15) + LONGSIZE) /* 16 */
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#define GDB_FR_REG17 ((GDB_FR_REG16) + LONGSIZE) /* 17 */
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#define GDB_FR_REG18 ((GDB_FR_REG17) + LONGSIZE) /* 18 */
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#define GDB_FR_REG19 ((GDB_FR_REG18) + LONGSIZE) /* 19 */
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#define GDB_FR_REG20 ((GDB_FR_REG19) + LONGSIZE) /* 20 */
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#define GDB_FR_REG21 ((GDB_FR_REG20) + LONGSIZE) /* 21 */
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#define GDB_FR_REG22 ((GDB_FR_REG21) + LONGSIZE) /* 22 */
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#define GDB_FR_REG23 ((GDB_FR_REG22) + LONGSIZE) /* 23 */
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#define GDB_FR_REG24 ((GDB_FR_REG23) + LONGSIZE) /* 24 */
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#define GDB_FR_REG25 ((GDB_FR_REG24) + LONGSIZE) /* 25 */
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#define GDB_FR_REG26 ((GDB_FR_REG25) + LONGSIZE) /* 26 */
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#define GDB_FR_REG27 ((GDB_FR_REG26) + LONGSIZE) /* 27 */
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#define GDB_FR_REG28 ((GDB_FR_REG27) + LONGSIZE) /* 28 */
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#define GDB_FR_REG29 ((GDB_FR_REG28) + LONGSIZE) /* 29 */
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#define GDB_FR_REG30 ((GDB_FR_REG29) + LONGSIZE) /* 30 */
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#define GDB_FR_REG31 ((GDB_FR_REG30) + LONGSIZE) /* 31 */
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/*
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* Saved special registers
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*/
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#define GDB_FR_STATUS ((GDB_FR_REG31) + LONGSIZE) /* 32 */
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#define GDB_FR_LO ((GDB_FR_STATUS) + LONGSIZE) /* 33 */
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#define GDB_FR_HI ((GDB_FR_LO) + LONGSIZE) /* 34 */
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#define GDB_FR_BADVADDR ((GDB_FR_HI) + LONGSIZE) /* 35 */
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#define GDB_FR_CAUSE ((GDB_FR_BADVADDR) + LONGSIZE) /* 36 */
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#define GDB_FR_EPC ((GDB_FR_CAUSE) + LONGSIZE) /* 37 */
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///*
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// * Saved floating point registers
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// */
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//#define GDB_FR_FPR0 ((GDB_FR_EPC) + LONGSIZE) /* 38 */
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//#define GDB_FR_FPR1 ((GDB_FR_FPR0) + LONGSIZE) /* 39 */
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//#define GDB_FR_FPR2 ((GDB_FR_FPR1) + LONGSIZE) /* 40 */
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//#define GDB_FR_FPR3 ((GDB_FR_FPR2) + LONGSIZE) /* 41 */
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//#define GDB_FR_FPR4 ((GDB_FR_FPR3) + LONGSIZE) /* 42 */
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//#define GDB_FR_FPR5 ((GDB_FR_FPR4) + LONGSIZE) /* 43 */
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//#define GDB_FR_FPR6 ((GDB_FR_FPR5) + LONGSIZE) /* 44 */
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//#define GDB_FR_FPR7 ((GDB_FR_FPR6) + LONGSIZE) /* 45 */
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//#define GDB_FR_FPR8 ((GDB_FR_FPR7) + LONGSIZE) /* 46 */
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//#define GDB_FR_FPR9 ((GDB_FR_FPR8) + LONGSIZE) /* 47 */
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//#define GDB_FR_FPR10 ((GDB_FR_FPR9) + LONGSIZE) /* 48 */
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//#define GDB_FR_FPR11 ((GDB_FR_FPR10) + LONGSIZE) /* 49 */
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//#define GDB_FR_FPR12 ((GDB_FR_FPR11) + LONGSIZE) /* 50 */
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//#define GDB_FR_FPR13 ((GDB_FR_FPR12) + LONGSIZE) /* 51 */
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//#define GDB_FR_FPR14 ((GDB_FR_FPR13) + LONGSIZE) /* 52 */
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//#define GDB_FR_FPR15 ((GDB_FR_FPR14) + LONGSIZE) /* 53 */
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//#define GDB_FR_FPR16 ((GDB_FR_FPR15) + LONGSIZE) /* 54 */
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//#define GDB_FR_FPR17 ((GDB_FR_FPR16) + LONGSIZE) /* 55 */
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//#define GDB_FR_FPR18 ((GDB_FR_FPR17) + LONGSIZE) /* 56 */
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//#define GDB_FR_FPR19 ((GDB_FR_FPR18) + LONGSIZE) /* 57 */
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//#define GDB_FR_FPR20 ((GDB_FR_FPR19) + LONGSIZE) /* 58 */
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//#define GDB_FR_FPR21 ((GDB_FR_FPR20) + LONGSIZE) /* 59 */
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//#define GDB_FR_FPR22 ((GDB_FR_FPR21) + LONGSIZE) /* 60 */
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//#define GDB_FR_FPR23 ((GDB_FR_FPR22) + LONGSIZE) /* 61 */
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//#define GDB_FR_FPR24 ((GDB_FR_FPR23) + LONGSIZE) /* 62 */
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//#define GDB_FR_FPR25 ((GDB_FR_FPR24) + LONGSIZE) /* 63 */
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//#define GDB_FR_FPR26 ((GDB_FR_FPR25) + LONGSIZE) /* 64 */
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//#define GDB_FR_FPR27 ((GDB_FR_FPR26) + LONGSIZE) /* 65 */
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//#define GDB_FR_FPR28 ((GDB_FR_FPR27) + LONGSIZE) /* 66 */
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//#define GDB_FR_FPR29 ((GDB_FR_FPR28) + LONGSIZE) /* 67 */
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//#define GDB_FR_FPR30 ((GDB_FR_FPR29) + LONGSIZE) /* 68 */
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//#define GDB_FR_FPR31 ((GDB_FR_FPR30) + LONGSIZE) /* 69 */
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//
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//#define GDB_FR_FSR ((GDB_FR_FPR31) + LONGSIZE) /* 70 */
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//#define GDB_FR_FIR ((GDB_FR_FSR) + LONGSIZE) /* 71 */
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//#define GDB_FR_FRP ((GDB_FR_FIR) + LONGSIZE) /* 72 */
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//
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//#define GDB_FR_DUMMY ((GDB_FR_FRP) + LONGSIZE) /* 73, unused ??? */
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//
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///*
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// * Again, CP0 registers
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// */
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//#define GDB_FR_CP0_INDEX ((GDB_FR_DUMMY) + LONGSIZE) /* 74 */
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#define GDB_FR_FRP ((GDB_FR_EPC) + LONGSIZE) /* 72 */
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#define GDB_FR_CP0_INDEX ((GDB_FR_FRP) + LONGSIZE) /* 74 */
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#define GDB_FR_CP0_RANDOM ((GDB_FR_CP0_INDEX) + LONGSIZE) /* 75 */
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#define GDB_FR_CP0_ENTRYLO0 ((GDB_FR_CP0_RANDOM) + LONGSIZE)/* 76 */
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#define GDB_FR_CP0_ENTRYLO1 ((GDB_FR_CP0_ENTRYLO0) + LONGSIZE)/* 77 */
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#define GDB_FR_CP0_CONTEXT ((GDB_FR_CP0_ENTRYLO1) + LONGSIZE)/* 78 */
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#define GDB_FR_CP0_PAGEMASK ((GDB_FR_CP0_CONTEXT) + LONGSIZE)/* 79 */
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#define GDB_FR_CP0_WIRED ((GDB_FR_CP0_PAGEMASK) + LONGSIZE)/* 80 */
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#define GDB_FR_CP0_REG7 ((GDB_FR_CP0_WIRED) + LONGSIZE) /* 81 */
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#define GDB_FR_CP0_REG8 ((GDB_FR_CP0_REG7) + LONGSIZE) /* 82 */
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#define GDB_FR_CP0_REG9 ((GDB_FR_CP0_REG8) + LONGSIZE) /* 83 */
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#define GDB_FR_CP0_ENTRYHI ((GDB_FR_CP0_REG9) + LONGSIZE) /* 84 */
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#define GDB_FR_CP0_REG11 ((GDB_FR_CP0_ENTRYHI) + LONGSIZE)/* 85 */
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#define GDB_FR_CP0_REG12 ((GDB_FR_CP0_REG11) + LONGSIZE) /* 86 */
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#define GDB_FR_CP0_REG13 ((GDB_FR_CP0_REG12) + LONGSIZE) /* 87 */
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#define GDB_FR_CP0_REG14 ((GDB_FR_CP0_REG13) + LONGSIZE) /* 88 */
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#define GDB_FR_CP0_PRID ((GDB_FR_CP0_REG14) + LONGSIZE) /* 89 */
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#define GDB_FR_SIZE ((((GDB_FR_CP0_PRID) + LONGSIZE) + (PTRSIZE-1)) & ~(PTRSIZE-1))
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/*
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* This is the same as above, but for the high-level
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* part of the INT stub.
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*/
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typedef struct pt_regs_s
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{
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/* Saved main processor registers. */
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rt_base_t regs[32];
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/* Saved special registers. */
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rt_base_t cp0_status;
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rt_base_t hi;
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rt_base_t lo;
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rt_base_t cp0_badvaddr;
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rt_base_t cp0_cause;
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rt_base_t cp0_epc;
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} pt_regs_t;
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typedef void (* exception_func_t)(pt_regs_t *regs);
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extern exception_func_t sys_exception_handlers[];
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exception_func_t rt_set_except_vector(int n, exception_func_t func);
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void install_default_execpt_handle(void);
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#endif /* end of __EXCEPTION_H__ */
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