PSR_CWP
regs->psr = (regs->psr & (PSR_CWP)) | PSR_S;
unsigned long cwp = regs->psr & PSR_CWP;
regs->psr = (gdb_regs[GDB_PSR] & ~PSR_CWP) | cwp;
ti->kwim = 1 << (((psr & PSR_CWP) + 1) % nwindows);