/****************************************************************************
**+-----------------------------------------------------------------------+**
**|                                                                       |**
**| Copyright(c) 1998 - 2008 Texas Instruments. All rights reserved.      |**
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****************************************************************************/


#include <linux/stddef.h>

unsigned long check_stack(unsigned long *base)
{
	
	register unsigned long sp asm ("sp");
	unsigned long retval = sp;
	*base = ((sp & ~0x1fff) + 0x380);
	return retval;
}

unsigned long check_stack_start(unsigned long *base)
{
    unsigned long i;
	unsigned long from,to;

	to = check_stack(&from);
	*base = from;

	/* run from the stack pointer down to the base */
	for (i = from;i<to;i+=4) 
	{
		/* fill up the pattern */
		*(long *)i = 0xdeadbeef;
	}
/*	printk("check_stack_start: from =%x to=%x data=%x\n",from,to,*(long *)(from+4));*/
	return to;
}

unsigned long check_stack_stop(unsigned long *base)
{
    unsigned long i;
	unsigned long from,to;

	to = check_stack(&from);
	*base = from;

	/* run from the stack pointer down to the base */
	for (i = from;i<to;i+=4) 
	{
		/* check up the pattern */
		if ((*(long *)i) != 0xdeadbeef)
			break;
	}

	/*printk("check_stack_stop: from =%x to=%x data=%x data=%x i=0x%x\n",from,to,*(long *)from,*(long *)(from+4),i);*/
	/* return the first time when the pattern doesn't match */
	return i;
}