60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
#ifndef XCPT_H
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#define XCPT_H
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#define MAX_NUM_XCPT 32
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#define XCPT_ERR_NOTHANDLED 0x80000000
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typedef enum
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{
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EXC_INT = 0, EXC_MOD = 1, EXC_TLBL = 2, EXC_TLBS = 3, EXC_ADEL = 4, EXC_ADES = 5,
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EXC_IBE = 6, EXC_DBE = 7, EXC_SYSCALL = 8, EXC_BP = 9, EXC_RI = 10, EXC_CPU = 11,
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EXC_OV = 12, EXC_TRAP = 13, EXC_VCEI = 14, EXC_FPE = 15, EXC_C2E = 16, EXC_WATCH = 23, EXC_VCED = 31
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} EXCEPTION_CODE;
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typedef unsigned int reg_t;
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typedef struct xcptcontext
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{
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/* This is the exception context frame that is passed to the exception
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handlers. It gets filled in by the low-level exception handler in
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"machine.S". An assembler version of this structure can be found at the
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bottom of "machine.H".*/
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reg_t sr; /* Status Register */
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reg_t cr; /* Cause Register */
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reg_t epc; /* PC at time of exception. */
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reg_t baddr;
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reg_t regs[32]; /* Copy of all general purpose registers */
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reg_t mdlo; /* HI/LO registers (used for memory management) */
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reg_t mdhi;
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reg_t count; /* Timer registers */
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reg_t compare;
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struct xcptcontext * prev; /* To link exceptions. (unused for now) */
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unsigned xclass; /* Priority class of this exception. (unused for now). */
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} EXCEPTION_CONTEXT;
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typedef int (*fp_xcpt_t)(struct xcptcontext * xcp);
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#define PRINT_REG(tag_str, reg) \
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sputs(tag_str); \
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print_word(reg); \
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sputs(" ");
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#define PRINT_REG_CHG(tag_str, reg, reg_last) \
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sputs(tag_str); \
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print_word(reg); \
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sputs(reg != reg_last ? "*" : " "); \
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sputs(" ");
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// Public functions
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void xcpt_register(int xcpt_num, fp_xcpt_t fp);
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int xcpt_get_type(struct xcptcontext * xcp);
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void xcpt_registers_print(struct xcptcontext * xcp);
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void xcpt_registers_print_with_change(struct xcptcontext * xcp, struct xcptcontext * xcp_last);
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void xcpt_exctype_print(struct xcptcontext * xcp);
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#endif // XCPT_H
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