[net-next-2.6.git] / lib / check_signature.c

#include <linux/io.h>
#include <linux/module.h>

/**
 *	check_signature		-	find BIOS signatures
 *	@io_addr: mmio address to check
 *	@signature:  signature block
 *	@length: length of signature
 *
 *	Perform a signature comparison with the mmio address io_addr. This
 *	address should have been obtained by ioremap.
 *	Returns 1 on a match.
 */

int check_signature(const volatile void __iomem *io_addr,
			const unsigned char *signature, int length)
{
	while (length--) {
		if (readb(io_addr) != *signature)
			return 0;
		io_addr++;
		signature++;
	}
	return 1;
}
EXPORT_SYMBOL(check_signature);
Commit	Line	Data
cc2ea416 AM	1	#include <linux/io.h>
	2	#include <linux/module.h>
	3
	4	/**
	5	* check_signature - find BIOS signatures
	6	* @io_addr: mmio address to check
	7	* @signature: signature block
	8	* @length: length of signature
	9	*
	10	* Perform a signature comparison with the mmio address io_addr. This
	11	* address should have been obtained by ioremap.
	12	* Returns 1 on a match.
	13	*/
	14
	15	int check_signature(const volatile void __iomem *io_addr,
	16	const unsigned char *signature, int length)
	17	{
	18	while (length--) {
	19	if (readb(io_addr) != *signature)
	20	return 0;
	21	io_addr++;
	22	signature++;
	23	}
	24	return 1;
	25	}
	26	EXPORT_SYMBOL(check_signature);