1 /* ----------------------------------------------------------------------- * 2 * 3 * Copyright 2009 Pierre-Alexandre Meyer 4 * 5 * Some parts borrowed from chain.c32: 6 * 7 * Copyright 2003-2009 H. Peter Anvin - All Rights Reserved 8 * Copyright 2009 Intel Corporation; author: H. Peter Anvin 9 * 10 * This file is part of Syslinux, and is made available under 11 * the terms of the GNU General Public License version 2. 12 * 13 * ----------------------------------------------------------------------- */ 14 15 #include <com32.h> 16 #include <stdlib.h> 17 #include <string.h> 18 #include <disk/geom.h> 19 20 #define MAX_NB_RETRIES 6 21 22 /** 23 * int13_retry - int13h with error handling 24 * @inreg: int13h function parameters 25 * @outreg: output registers 26 * 27 * Call int 13h, but with retry on failure. Especially floppies need this. 28 **/ 29 int int13_retry(const com32sys_t * inreg, com32sys_t * outreg) 30 { 31 int retry = MAX_NB_RETRIES; /* Number of retries */ 32 com32sys_t tmpregs; 33 34 if (!outreg) 35 outreg = &tmpregs; 36 37 while (retry--) { 38 __intcall(0x13, inreg, outreg); 39 if (!(outreg->eflags.l & EFLAGS_CF)) 40 return 0; /* CF=0 => OK */ 41 } 42 43 /* If we get here: error */ 44 return -1; 45 } 46
