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  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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lib/check_signature.c
 
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#include <linux/io.h>
 
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#include <linux/module.h>
 
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/**
 
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 *      check_signature         -       find BIOS signatures
 
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 *      @io_addr: mmio address to check
 
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 *      @signature:  signature block
 
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 *      @length: length of signature
 
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 *
 
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 *      Perform a signature comparison with the mmio address io_addr. This
 
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 *      address should have been obtained by ioremap.
 
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 *      Returns 1 on a match.
 
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 */
 
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int check_signature(const volatile void __iomem *io_addr,
 
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                        const unsigned char *signature, int length)
 
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{
 
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        while (length--) {
 
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                if (readb(io_addr) != *signature)
 
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                        return 0;
 
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                io_addr++;
 
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                signature++;
 
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        }
 
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        return 1;
 
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}
 
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EXPORT_SYMBOL(check_signature);