void
_general_exception_handler( unsigned int cause, unsigned int status )
{
uint32_t excep_code;
uint32_t excep_addr;
excep_code = (cause & 0x0000007C) >> 2;
excep_addr = __builtin_mfc0(_CP0_EPC, _CP0_EPC_SELECT);
if ((cause & 0x80000000) != 0)
{
excep_addr += 4;
}
while (1);
}
/* enable this if ReadCoreTimer and WriteCoreTimer are missing */
unsigned int ReadCoreTimer(void)
{
unsigned int timer;
timer = __builtin_mfc0(9, 0);
return timer;
}
typedef enum {
EXCEP_IRQ = 0, // interrupt
EXCEP_ADDR_ERR_L = 4, // address error exception (load or ifetch)
EXCEP_ADDR_ERR_S, // address error exception (store)
EXCEP_BUS_ERR_F, // bus error (ifetch)
EXCEP_BUS_ERR_LS, // bus error (load/store)
EXCEP_SYSCALL, // syscall
EXCEP_BREAKPOINT, // breakpoint
EXCEP_RES_OPCODE, // reserved instruction
EXCEP_CP_UNUSE, // coprocessor unusable
EXCEP_OVERFLOW, // arithmetic overflow
EXCEP_TRAP, // trap (possible divide by zero)
EXCEP_IS1 = 16, // implementation specfic 1
EXCEP_CEU, // CorExtend Unuseable
EXCEP_C2E // coprocessor 2
} _EXCEP_CODE;
volatile _EXCEP_CODE _excep_code;
volatile void *_excep_addr;
void _general_exception_handler (void)
{
_excep_code = (__builtin_mfc0(13, 0) & 0x0000007C) >> 2;
_excep_addr = (void*)__builtin_mfc0(14, 0);
//for (;;);
}
