PSL_IPL0
[IPL_NONE] = PSL_IPL0|PSL_S,
[IPL_NONE] = PSL_S | PSL_IPL0,
#define _spl0() _spl(PSL_S|PSL_IPL0)
[IPL_NONE] = PSL_S | PSL_IPL0,
[IPL_NONE] = PSL_S | PSL_IPL0,
[IPL_NONE] = PSL_S | PSL_IPL0,