Revision 43598875b35fdd3f699954078b7df24b5647a27a authored by Ben Skeggs on 22 November 2012, 03:27:37 UTC, committed by Ben Skeggs on 28 November 2012, 23:58:04 UTC
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
1 parent e5e454f
check_signature.c
#include <linux/io.h>
#include <linux/export.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);
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