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/* ----------------------------------------------------------------------- *
*
* Copyright 2009 Pierre-Alexandre Meyer
*
* Some parts borrowed from chain.c32:
*
* Copyright 2003-2009 H. Peter Anvin - All Rights Reserved
* Copyright 2009 Intel Corporation; author: H. Peter Anvin
*
* This file is part of Syslinux, and is made available under
* the terms of the GNU General Public License version 2.
*
* ----------------------------------------------------------------------- */
#include <com32.h>
#include <stdlib.h>
#include <string.h>
#include <disk/geom.h>
#define MAX_NB_RETRIES 6
/**
* int13_retry - int13h with error handling
* @inreg: int13h function parameters
* @outreg: output registers
*
* Call int 13h, but with retry on failure. Especially floppies need this.
**/
int int13_retry(const com32sys_t * inreg, com32sys_t * outreg)
{
int retry = MAX_NB_RETRIES; /* Number of retries */
com32sys_t tmpregs;
if (!outreg)
outreg = &tmpregs;
while (retry--) {
__intcall(0x13, inreg, outreg);
if (!(outreg->eflags.l & EFLAGS_CF))
return 0; /* CF=0 => OK */
}
/* If we get here: error */
return -1;
}
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