1 files changed, 45 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/gpllib/disk/util.c b/contrib/syslinux-4.02/com32/gpllib/disk/util.c
new file mode 100644
index 0000000..59c0328
--- /dev/null
+++ b/contrib/syslinux-4.02/com32/gpllib/disk/util.c
@@ -0,0 +1,45 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   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;
+}