#ifndef XCPT_H
#define XCPT_H

#define MAX_NUM_XCPT			32
#define	XCPT_ERR_NOTHANDLED		0x80000000

typedef enum
{
	EXC_INT = 0, EXC_MOD = 1, EXC_TLBL = 2, EXC_TLBS = 3, EXC_ADEL = 4, EXC_ADES = 5,
	EXC_IBE = 6, EXC_DBE = 7, EXC_SYSCALL = 8, EXC_BP = 9, EXC_RI = 10, EXC_CPU = 11,
	EXC_OV = 12, EXC_TRAP = 13, EXC_VCEI = 14, EXC_FPE = 15, EXC_C2E = 16, EXC_WATCH = 23, EXC_VCED = 31

} EXCEPTION_CODE;

typedef unsigned int reg_t;

typedef struct xcptcontext
{
	/* This is the exception context frame that is passed to the exception
	handlers. It gets filled in by the low-level exception handler in
	"machine.S". An assembler version of this structure can be found at the
	bottom of "machine.H".*/
	reg_t sr;					/* Status Register */
	reg_t cr;					/* Cause Register */
	reg_t epc;					/* PC at time of exception. */
	reg_t baddr;
	reg_t regs[32];				/* Copy of all general purpose registers */
	reg_t mdlo;					/* HI/LO registers (used for memory management) */
	reg_t mdhi;
	reg_t count;				/* Timer registers */
	reg_t compare;
	struct xcptcontext * prev;	/* To link exceptions. (unused for now) */
	unsigned xclass;			/* Priority class of this exception. (unused for now). */

} EXCEPTION_CONTEXT;

typedef int (*fp_xcpt_t)(struct xcptcontext * xcp);

#define PRINT_REG(tag_str, reg)			\
			sputs(tag_str);				\
			print_word(reg);			\
			sputs("   ");


#define PRINT_REG_CHG(tag_str, reg, reg_last)			\
			sputs(tag_str);				\
			print_word(reg);			\
			sputs(reg != reg_last ? "*" : " ");			\
			sputs("  ");


// Public functions
void xcpt_register(int xcpt_num, fp_xcpt_t fp);
int xcpt_get_type(struct xcptcontext * xcp);
void xcpt_registers_print(struct xcptcontext * xcp);
void xcpt_registers_print_with_change(struct xcptcontext * xcp, struct xcptcontext * xcp_last);
void xcpt_exctype_print(struct xcptcontext * xcp);

#endif // XCPT_H