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/*
 *   FILE: head.c
 * AUTHOR: kma
 *  DESCR: Initialization code for the i960.
 */
 
#ident "$Id: head.c,v 1.1 2005-12-20 09:42:38 jcastillo Exp $"
 
#include <linux/autoconf.h>
#include <linux/kernel.h>
 
/*
 * So here we are! Running at ipl 31, in supervisor mode, on mon960's user
 * stack. Do we need to do much here? Let's just get right into start_kernel.
 */
 
int main(void)
{
	long oldac;
 
	extern void start_kernel(void);
 
	/* 64-bit math routines need the overflow mask bit set */
	__asm__ __volatile__
		("modac	%1, %1, %1" : "=r"(oldac) : "0"(1 << 12));
 
	/* Make the i960 think it's in an interrupt handler. This has the effect
	 * of not switching to the interrupt stack for every interrupt. Of
	 * course, we wouldn't need this if there were a sensible way of
	 * specifying an interrupt stack short of reinitializing the CPU, but
	 * such is life.
	 * 
	 * XXX: this has the effect of using user stacks for interrupts too.
	 * The world's a scary place.
	 */
	__asm__ __volatile__ ("modpc	%1, %1, %1" : "=r"(oldac) : "0"(1<<13));
 
#ifdef CONFIG_CMDLINE_PROMPT
	/* do crazy command-line obtainments... */
#endif
 
	start_kernel();
 
	printk("XXX: start_kernel returned!!!\n");
	for(;;) ;
}