////////////////////////////////////////////////////////////////////////
// Installs ee exception handlers for the 'usual' exceptions and iop
// exception callback
void
installExceptionHandlers(void)
{
int i;
// Skip exception #8 (syscall) & 9 (breakpoint)
for (i = 1; i < 4; i++) {
SetVTLBRefillHandler(i, pkoExceptionHandler);
}
for (i = 4; i < 8; i++) {
SetVCommonHandler(i, pkoExceptionHandler);
}
for (i = 10; i < 14; i++) {
SetVCommonHandler(i, pkoExceptionHandler);
}
}
int ee_dbg_remove(int levels)
{
u32 oldintr, oldop;
int i;
if((levels < 1) || (levels > 3)) { return(-1); }
if(!(_installed_levels & levels)) { return(-1); }
if((levels & _installed_levels) & 2)
{
oldintr = DIntr();
oldop = ee_set_opmode(0);
ee_dbg_clr_bps();
// restore the original debug exception vector.
memcpy((void *) (0x80000100), &__saved_dbg_ex_vector, sizeof(__saved_dbg_ex_vector));
ee_set_opmode(oldop);
if(oldintr) { EIntr(); }
FlushCache(0);
FlushCache(2);
_installed_levels &= 1;
}
if((levels & _installed_levels) & 1)
{
// restore the exception handlers that we previously hooked.
for(i = 1; i <= 3; i++)
{
if(_old_l1_handlers[i] != NULL)
{
SetVTLBRefillHandler(i, _old_l1_handlers[i]);
_old_l1_handlers[i] = NULL;
}
}
for(i = 4; i <= 7; i++)
{
if(_old_l1_handlers[i] != NULL)
{
SetVCommonHandler(i, _old_l1_handlers[i]);
_old_l1_handlers[i] = NULL;
}
}
for(i = 10; i <= 13; i++)
{
if(_old_l1_handlers[i] != NULL)
{
SetVCommonHandler(i, _old_l1_handlers[i]);
_old_l1_handlers[i] = NULL;
}
}
FlushCache(0);
FlushCache(2);
_installed_levels &= 2;
}
return(0);
}
int ee_dbg_install(int levels)
{
u32 oldintr, oldop;
int i;
if(_installed_levels & levels)
{
return(-1);
}
if(levels & 1)
{
for(i = 0; i < 16; i++) { ee_level1_exception_handlers[i] = NULL; }
}
if(levels & 2)
{
for(i = 0; i < 4; i++) { ee_level2_exception_handlers[i] = NULL; }
oldintr = DIntr();
oldop = ee_set_opmode(0);
ee_dbg_clr_bps();
// save the original level 2 debug exception vector.
memcpy(&__saved_dbg_ex_vector, (void *) (0x80000100), 0x80);
// replace the level 2 debug exception vector with our own
memcpy((void *) (0x80000100), &__ee_level2_ex_vector, 32);
ee_set_opmode(oldop);
if(oldintr) { EIntr(); }
}
if(levels & 1)
{
// redirect desirable "Level 1" exceptions to our level 1 handler.
for(i = 1; i <= 3; i++)
{
_old_l1_handlers[i] = GetExceptionHandler(i);
SetVTLBRefillHandler(i, __ee_level1_ex_vector);
}
for(i = 4; i <= 7; i++)
{
_old_l1_handlers[i] = GetExceptionHandler(i);
SetVCommonHandler(i, __ee_level1_ex_vector);
}
for(i = 10; i <= 13; i++)
{
_old_l1_handlers[i] = GetExceptionHandler(i);
SetVCommonHandler(i, __ee_level1_ex_vector);
}
}
FlushCache(0);
FlushCache(2);
_installed_levels |= levels;
return(0);
}
