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#ifndef __DS2_EXCPT_H__
#define __DS2_EXCPT_H__
#include <mipsregs.h>
extern unsigned int Process_RA;
extern unsigned int Process_SP;
#define SAVE_PROCESS_REGISTER() \
do{ unsigned int sr ; \
sr = read_c0_status(); \
write_c0_status((sr&(~1))); \
__asm__ __volatile__( \
"sw $31,0x00(%0)\n\t" \
"sw $29,0x00(%1)\n\t" \
: \
: "r" (&Process_RA),"r" (&Process_SP)); \
write_c0_status(sr); \
}while(0)
#define RESTORE_PROCESS_REGISTER() \
__asm__ __volatile__( \
"lw $31,0x00(%0)\n\t" \
"lw $29,0x00(%1)\n\t" \
: \
: "r" (&Process_RA),"r" (&Process_SP))
inline static void excpt_exit(x) \
{
unsigned int sr;
sr = read_c0_status();
write_c0_status(sr & (~1));
__asm__ __volatile__("lw $2,0x00(%0)\n\t" :: "r" (&x));
RESTORE_PROCESS_REGISTER();
write_c0_status(sr);
__asm__ __volatile__(
"jr $31\n\t"
"nop\n\t"
);
}
typedef void (*PFun_Exception_Handler)(unsigned int);
//Setup handle to process the exception
//except_index: exception number
//except_handle: handle to process the exception
//arg: argument to the handle
extern int Setup_except_handle(unsigned int except_index, PFun_Exception_Handler except_handle, unsigned int arg);
//Add a write watched exception, if the CPU write the addr, a exception will
// generated, the watch exception's number is 23
//addr: address to be watched
extern void add_watch_point(unsigned int addr);
#endif //__DS2_EXCPT_H__
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