[mirror_ubuntu-artful-kernel.git] / arch / blackfin / kernel / exception.c

/* Basic functions for adding/removing custom exception handlers
 *
 * Copyright 2004-2009 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later
 */

#include <linux/module.h>
#include <asm/irq_handler.h>

int bfin_request_exception(unsigned int exception, void (*handler)(void))
{
	void (*curr_handler)(void);

	if (exception > 0x3F)
		return -EINVAL;

	curr_handler = ex_table[exception];

	if (curr_handler != ex_replaceable)
		return -EBUSY;

	ex_table[exception] = handler;

	return 0;
}
EXPORT_SYMBOL(bfin_request_exception);

int bfin_free_exception(unsigned int exception, void (*handler)(void))
{
	void (*curr_handler)(void);

	if (exception > 0x3F)
		return -EINVAL;

	curr_handler = ex_table[exception];

	if (curr_handler != handler)
		return -EBUSY;

	ex_table[exception] = ex_replaceable;

	return 0;
}
EXPORT_SYMBOL(bfin_free_exception);
Commit	Line	Data
2a12c463 RG	1	/* Basic functions for adding/removing custom exception handlers
	2	*
	3	* Copyright 2004-2009 Analog Devices Inc.
	4	*
	5	* Licensed under the GPL-2 or later
	6	*/
	7
	8	#include <linux/module.h>
	9	#include <asm/irq_handler.h>
	10
	11	int bfin_request_exception(unsigned int exception, void (*handler)(void))
	12	{
	13	void (*curr_handler)(void);
	14
	15	if (exception > 0x3F)
	16	return -EINVAL;
	17
	18	curr_handler = ex_table[exception];
	19
	20	if (curr_handler != ex_replaceable)
	21	return -EBUSY;
	22
	23	ex_table[exception] = handler;
	24
	25	return 0;
	26	}
	27	EXPORT_SYMBOL(bfin_request_exception);
	28
	29	int bfin_free_exception(unsigned int exception, void (*handler)(void))
	30	{
	31	void (*curr_handler)(void);
	32
	33	if (exception > 0x3F)
	34	return -EINVAL;
	35
	36	curr_handler = ex_table[exception];
	37
	38	if (curr_handler != handler)
	39	return -EBUSY;
	40
	41	ex_table[exception] = ex_replaceable;
	42
	43	return 0;
	44	}
	45	EXPORT_SYMBOL(bfin_free_exception);