Add 32 bit versions of message and dump_eax that write directly to

the serial port. Useful for debugging - especially real_to_prot!

sys/arch/i386/stand/lib/Makefile

@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.28 2009/03/30 09:22:52 tsutsui Exp $
+#	$NetBSD: Makefile,v 1.29 2009/11/19 22:13:17 dsl Exp $
 
 S?=	${.CURDIR}/../../../..
 
@@ -23,7 +23,7 @@ SRCS+= pread.c menuutils.c parseutils.c
 SRCS+= bootinfo.c bootinfo_biosgeom.c bootinfo_memmap.c
 SRCS+= startprog.S multiboot.S panic.c
 SRCS+= biosgetsystime.S cpufunc.S bootmenu.c
-SRCS+= realprot.S message.S dump_eax.S pvcopy.S putstr.S
+SRCS+= realprot.S message.S message32.S dump_eax.S pvcopy.S putstr.S
 SRCS+= rasops.c vbe.c biosvbe.S
 .if (${I386_INCLUDE_DISK} == "yes")
 SRCS+= biosdisk.c biosdisk_ll.c bios_disk.S

sys/arch/i386/stand/lib/message32.S

@@ -0,0 +1,87 @@
+/*	$NetBSD: message32.S,v 1.1 2009/11/19 22:13:17 dsl Exp $	*/
+
+/*-
+ * Copyright (c) 2003 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by David Laight.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <machine/asm.h>
+
+/* 
+ * Output messages directly to serial port from 32bit mode.
+ * Useful for debugging when the real-prot is suspect.
+ *
+ * %ds:dump_eax_buff must be somewhere it is safe to write 12 bytes.
+ */
+
+#ifndef COM_PORT_VAL
+#define COM_PORT_VAL $0x3f8	/* Standard address COM1 (dty0) */
+#endif
+
+	.globl	message32
+	.code32
+message32:
+	pusha   
+message32_1:
+	lodsb   
+2:
+	mov     COM_PORT_VAL, %dx
+	outb    %al, %dx
+	add     $5, %dl
+3:      inb     %dx
+	test    $0x40, %al
+	jz      3b
+
+	lodsb
+	test    %al, %al
+	jnz     2b
+	popa
+	ret     
+
+	.globl	dump_eax32
+dump_eax32:
+	pusha
+	movl	$dump_eax_buff, %esi
+	mov	%esi, %edi
+	push	$8
+	pop	%ecx
+1:	roll	$4, %eax
+	push	%eax
+	andb	$0x0f, %al
+	addb	$0x30, %al			/* 30..3f - clear AF */
+#if 1 /* 5 bytes to generate real hex... */
+	daa					/* 30..39, 40..45 */
+	addb	$0xc0, %al			/* f0..f9, 00..05 */
+	adcb	$0x40, %al			/* 30..39, 41..46 */
+#endif
+	movb	%al,(%edi)
+	inc	%edi
+	pop	%eax
+	loop	1b
+	push	$0x20				/* space + 3 NULs */
+	pop	(%edi)
+	jmp	message32_1