/*
 * coswitch for the m68k architecture
 */

int
coswitch (int *old_cs, int *new_cs, int first)
{
	asm ("movl %a6@(8),%a0");		/* a0 = old */
	asm ("movl %a6@(12),%a1");		/* a1 = new */
	asm ("movl %a7,%a0@");		        /* save sp in cstate[0] */
	asm ("movl %a6,%a0@(4)");		/* save a6 (fp) in cstate[0] */
	asm ("moveml #0x3cfc,%a0@(8)");		/* store d2-d7, a2-a6 in old->cstate */

	if (first == 0) {                       /* this is first activation */
		asm ("movl %a1@,%a7");
		asm ("movl #0,%a6");
		new_context (0, 0);
		syserr ("new_context() returned in coswitch");
	}
	else {
		asm ("movl %a1@,%a7");		/* restore sp */
		asm ("movl %a1@(4),%a6");	/* restore fp */
		asm ("moveml %a1@(8),#0x3cfc");	/* restore d2-d7, a2-a6 */
	}
}