From c8a7691f703d0d60bdde045610989dd3ef67ee27 Mon Sep 17 00:00:00 2001
From: weingart <weingart@openbsd.org>
Date: Fri, 18 Apr 1997 06:54:40 +0000
Subject: [PATCH] Clean up error handling a little.  There is a small problem
 with marginal disks.  This code does not like them at all.  I'm too frazzled
 right now to figure this out.  This should give better error messages...

---
 sys/arch/i386/stand/libsa/biosdev.c  | 27 +++++++++++++--------------
 sys/arch/i386/stand/libsa/biosdev.h  |  3 ++-
 sys/arch/i386/stand/libsa/biosdisk.S | 23 ++++++++++++++++++++++-
 3 files changed, 37 insertions(+), 16 deletions(-)

diff --git a/sys/arch/i386/stand/libsa/biosdev.c b/sys/arch/i386/stand/libsa/biosdev.c
index ce0862184f4..d7600c3dcf9 100644
--- a/sys/arch/i386/stand/libsa/biosdev.c
+++ b/sys/arch/i386/stand/libsa/biosdev.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: biosdev.c,v 1.10 1997/04/18 04:23:51 mickey Exp $	*/
+/*	$OpenBSD: biosdev.c,v 1.11 1997/04/18 06:54:40 weingart Exp $	*/
 
 /*
  * Copyright (c) 1996 Michael Shalayeff
@@ -307,10 +307,12 @@ biosstrategy(void *devdata, int rw,
 		if (debug)
 			printf(" (%d,%d,%d,%d)@%p", cyl, hd, sect, n, bb);
 #endif
-		for (error = 1, j = 5; error && j--;) {
-			error = (rw == F_READ)?
-				  biosread (bd->biosdev, cyl, hd, sect, n, bb)
-				: bioswrite(bd->biosdev, cyl, hd, sect, n, bb);
+		/* Try to do operation up to 5 times */
+		for (error = 1, j = 5; error && (j > 0); j--) {
+			if(rw == F_READ)
+				error = biosread(bd->biosdev, cyl, hd, sect, n, bb);
+			else
+				error = bioswrite(bd->biosdev, cyl, hd, sect, n, bb);
 
 			switch (error) {
 			case 0x00:	/* No errors */
@@ -318,15 +320,12 @@ biosstrategy(void *devdata, int rw,
 				error = 0;
 				break;
 
-			default:
-#ifdef	BIOS_DEBUG
-				if (debug) {
-					for (p = bd_errors; p < &bd_errors[bd_nents] &&
-			     			p->bd_id != error; p++);
-					printf("\nBIOS error %x (%s)\n", p->bd_id, p->msg);
-				}
-#endif
-				continue;
+			default:	/* All other errors */
+				for (p = bd_errors; p < &bd_errors[bd_nents] &&
+					p->bd_id != error; p++);
+				printf("\nBIOS error %x (%s)\n", p->bd_id, p->msg);
+				biosdreset();
+				break;
 			}
 		}
 
diff --git a/sys/arch/i386/stand/libsa/biosdev.h b/sys/arch/i386/stand/libsa/biosdev.h
index 198003f118a..c20004f32d8 100644
--- a/sys/arch/i386/stand/libsa/biosdev.h
+++ b/sys/arch/i386/stand/libsa/biosdev.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: biosdev.h,v 1.4 1997/04/09 08:39:17 mickey Exp $	*/
+/*	$OpenBSD: biosdev.h,v 1.5 1997/04/18 06:54:42 weingart Exp $	*/
 
 /*
  * Copyright (c) 1996 Michael Shalayeff
@@ -50,6 +50,7 @@ int biosioctl __P((struct open_file *, u_long, void *));
 
 /* biosdisk.S */
 u_int16_t biosdinfo __P((int dev));
+int		biosdreset __P((void));
 int     biosread  __P((int dev, int cyl, int hd, int sect, int nsect, void *));
 int     bioswrite __P((int dev, int cyl, int hd, int sect, int nsect, void *));
 
diff --git a/sys/arch/i386/stand/libsa/biosdisk.S b/sys/arch/i386/stand/libsa/biosdisk.S
index bd9e0c670ad..06890298926 100644
--- a/sys/arch/i386/stand/libsa/biosdisk.S
+++ b/sys/arch/i386/stand/libsa/biosdisk.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: biosdisk.S,v 1.5 1997/04/09 08:39:20 mickey Exp $	*/
+/*	$OpenBSD: biosdisk.S,v 1.6 1997/04/18 06:54:43 weingart Exp $	*/
 
 /*
  * Ported to boot 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
@@ -141,3 +141,24 @@ ENTRY(biosdinfo)
 	popl	%ebp
 	ret
 
+
+/*
+#
+# biosdreset(): reset disk system
+#
+*/
+
+ENTRY(biosdreset)
+	pushl	%ebp
+	movl	%esp, %ebp
+	pushl	%ebx
+	pushl	%ecx
+
+	movb	$0x00, %ah		# ask for disk info
+	BIOSINT(0x13)
+
+	popl	%ecx
+	popl	%ebx
+	popl	%ebp
+	ret
+
-- 
2.20.1