This one is an example on how to drop vgabios.c from the mainboard or chipset

directories and use the global (v3) one in util/x86emu instead. It also fixes
the breakage introduced by 4000

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4001 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

4 files changed, 21 insertions, 851 deletions

diff --git a/src/mainboard/emulation/qemu-x86/Config.lb b/src/mainboard/emulation/qemu-x86/Config.lb
index 49cbb95ac5..160bfa6ac5 100644
--- a/src/mainboard/emulation/qemu-x86/Config.lb
+++ b/src/mainboard/emulation/qemu-x86/Config.lb
@@ -39,7 +39,6 @@ arch i386 end
 ##
 
 driver mainboard.o
-object vgabios.o
 if HAVE_PIRQ_TABLE object irq_tables.o end
 #object reset.o
 
diff --git a/src/mainboard/emulation/qemu-x86/Options.lb b/src/mainboard/emulation/qemu-x86/Options.lb
index e1fa3b13f7..bf8ac39ef1 100644
--- a/src/mainboard/emulation/qemu-x86/Options.lb
+++ b/src/mainboard/emulation/qemu-x86/Options.lb
@@ -35,6 +35,8 @@ uses CROSS_COMPILE
 uses CC
 uses HOSTCC
 uses OBJCOPY
+uses CONFIG_PCI_ROM_RUN
+uses CONFIG_PCI_OPTION_ROM_RUN_VM86
 
 uses CONFIG_CONSOLE_SERIAL8250
 
@@ -78,6 +80,12 @@ default IRQ_SLOT_COUNT=6
 ##
 default HAVE_OPTION_TABLE=1
 
+##
+## Option ROM init
+##
+default CONFIG_PCI_ROM_RUN=1
+default CONFIG_PCI_OPTION_ROM_RUN_VM86=1
+
 ###
 ### coreboot layout values
 ###
@@ -113,5 +121,3 @@ default CC="$(CROSS_COMPILE)gcc -m32"
 default HOSTCC="gcc"
 
 end
-
-
diff --git a/src/mainboard/emulation/qemu-x86/mainboard.c b/src/mainboard/emulation/qemu-x86/mainboard.c
index 99e289f334..7e3273a43e 100644
--- a/src/mainboard/emulation/qemu-x86/mainboard.c
+++ b/src/mainboard/emulation/qemu-x86/mainboard.c
@@ -3,21 +3,24 @@
 #include <device/pci.h>
 #include <device/pci_ids.h>
 #include <device/pci_ops.h>
+#include <pc80/keyboard.h>
 #include <arch/io.h>
 #include "chip.h"
 
-void vga_enable_console();
-
 static void vga_init(device_t dev)
 {
-	/* code to make vga init run in real mode - does work but against the current coreboot philosophy */
-	printk_debug("INSTALL REAL-MODE IDT\n");
-        setup_realmode_idt();
-        printk_debug("DO THE VGA BIOS\n");
-        do_vgabios();
-
-	vga_enable_console();
-
+	/* The VGA OPROM already lives at 0xc0000,
+	 * force coreboot to use it.
+	 */
+	dev->on_mainboard = 1;
+	dev->rom_address = 0xc0000;
+
+	/* Now do the usual initialization */
+	pci_dev_init(dev);
+
+	/* This sneaked in here, because Qemu does not
+	 * emulate a SuperIO chip
+	 */
 	init_pc_keyboard(0x60, 0x64, 0);
 }
 
diff --git a/src/mainboard/emulation/qemu-x86/vgabios.c b/src/mainboard/emulation/qemu-x86/vgabios.c
deleted file mode 100644
index 6daa22666d..0000000000
--- a/src/mainboard/emulation/qemu-x86/vgabios.c
+++ /dev/null
@@ -1,838 +0,0 @@
-#include <console/console.h>
-#include <device/pci.h>
-#include <device/pci_ids.h>
-#include <device/pci_ops.h>
-#undef __KERNEL__
-#include <arch/io.h>
-#include <string.h>
-
-/* vgabios.c. Derived from: */
-
-/*------------------------------------------------------------ -*- C -*-
- *  2 Kernel Monte a.k.a. Linux loading Linux on x86
- *
- *  Erik Arjan Hendriks <hendriks@lanl.gov>
- *
- *  This version is a derivative of the original two kernel monte
- *  which is (C) 2000 Scyld.
- *
- *  Copyright (C) 2000 Scyld Computing Corporation
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Portions related to the alpha architecture are:
- *
- *  Copyright(C) 2001 University of California.  LA-CC Number 01-67.
- *  This software has been authored by an employee or employees of the
- *  University of California, operator of the Los Alamos National
- *  Laboratory under Contract No.  W-7405-ENG-36 with the U.S.
- *  Department of Energy.  The U.S. Government has rights to use,
- *  reproduce, and distribute this software. If the software is
- *  modified to produce derivative works, such modified software should
- *  be clearly marked, so as not to confuse it with the version
- *  available from LANL.
- *
- *  This software may be used and distributed according to the terms
- *  of the GNU General Public License, incorporated herein by
- *  reference to http://www.gnu.org/licenses/gpl.html.
- *
- *  This software is provided by the author(s) "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 author(s) 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.
- *
- *  $Id: vgabios.c,v 1.5 2004/10/06 17:33:52 rminnich Exp $
- *--------------------------------------------------------------------*/
-
-/* Modified to be a self sufficient plug in so that it can be used 
-   without reliance on other parts of core coreboot 
-   (C) 2005 Nick.Barker9@btinternet.com
-
-  Used initially for epia-m where there are problems getting the bios
-  emulator to successfully run this bios.
-*/
-
-/* Declare a temporary global descriptor table - necessary because the
-   Core part of the bios no longer sets up any 16 bit segments */
-__asm__ (
-	/* pointer to original gdt */
-	"gdtarg:			\n"
-	"	.word	gdt_limit	\n"
-	"	.long	gdt	       	\n"		
-
-	/* compute the table limit */
-	"__mygdt_limit = __mygdt_end - __mygdt - 1	\n"
-
-	"__mygdtaddr:			\n"
-	"	.word	__mygdt_limit  	\n"
-	"	.long	__mygdt	       	\n"
-
-	"__mygdt: 		       	\n"
-	/* selgdt 0, unused */
-	"	.word	0x0000, 0x0000	\n"
-	"	.byte	0x00, 0x00, 0x00, 0x00	\n"
-
-	/* selgdt 8, unused */
-	"	.word	0x0000, 0x0000	       	\n"
-	"	.byte	0x00, 0x00, 0x00, 0x00	\n"
-
-	/* selgdt 0x10, flat code segment */
-	"	.word	0xffff, 0x0000	       	\n"
-	"	.byte	0x00, 0x9b, 0xcf, 0x00	\n"	
-
-	/* selgdt 0x18, flat data segment */
-	"	.word	0xffff, 0x0000	       	\n"
-	"	.byte	0x00, 0x93, 0xcf, 0x00	\n"
-
-	/* selgdt 0x20, unused */
-	"	.word	0x0000, 0x0000	       	\n"
-	"	.byte	0x00, 0x00, 0x00, 0x00	\n"
-
-        /* selgdt 0x28 16-bit 64k code at 0x00000000 */
-	"	.word	0xffff, 0x0000	       	\n"
-	"	.byte	0, 0x9a, 0, 0	       	\n"
-
-	/* selgdt 0x30 16-bit 64k data at 0x00000000 */
-	"	.word	0xffff, 0x0000	       	\n"
-	"	.byte	0, 0x92, 0, 0	       	\n"
-
-	"__mygdt_end:				\n"
-);
-
-/* Declare a pointer to where our idt is going to be i.e. at mem zero */
-__asm__ ("__myidt:		\n"
-	 /* 16-bit limit */
-	 "	.word 1023	\n"
-	 /* 24-bit base */
-	 "	.long 0		\n"
-	 "	.word 0		\n"
-);
-
-/* The address arguments to this function are PHYSICAL ADDRESSES */ 
-static void real_mode_switch_call_vga(unsigned long devfn)
-{
-	__asm__ __volatile__ (
-		// paranoia -- does ecx get saved? not sure. This is 
-		// the easiest safe thing to do.
-		"	pushal			\n"
-		/* save the stack */
-		"	mov 	%esp, __stack	\n"
-		"	jmp 	1f		\n"
-		"__stack: .long 0		\n"
-		"1:\n"
-		/* get devfn into %ecx */
-		"	movl    %esp, %ebp	\n"
-		"	movl    8(%ebp), %ecx	\n"
-		/* load 'our' gdt */
-		"	lgdt	%cs:__mygdtaddr	\n"
-
-		/*  This configures CS properly for real mode. */
-		"	ljmp	$0x28, $__rms_16bit\n"
-		"__rms_16bit:		  	\n"
-		"	.code16			\n"
-		/* 16 bit code from here on... */
-
-		/* Load the segment registers w/ properly configured segment
-		 * descriptors.  They will retain these configurations (limits,
-		 * writability, etc.) once protected mode is turned off. */
-		"	mov	$0x30, %ax	\n"
-		"	mov	%ax, %ds       	\n"
-		"	mov	%ax, %es       	\n"
-		"	mov	%ax, %fs       	\n"
-		"	mov	%ax, %gs       	\n"
-		"	mov	%ax, %ss       	\n"
-
-		/* Turn off protection (bit 0 in CR0) */
-		"	movl	%cr0, %eax	\n"
-		"	andl	$0xFFFFFFFE, %eax \n"
-		"	movl	%eax, %cr0	\n"
-
-		/* Now really going into real mode */
-		"	ljmp	$0,  $__rms_real\n"
-		"__rms_real:			\n"
-
-		/* put the stack at the end of page zero. 
-		 * that way we can easily share it between real and protected, 
-		 * since the 16-bit ESP at segment 0 will work for any case. 
-		/* Setup a stack */
-		"	mov	$0x0, %ax	\n"
-		"	mov	%ax, %ss	\n"
-		"	movl	$0x1000, %eax	\n"
-		"	movl	%eax, %esp	\n"
-
-		/* Load our 16 it idt */
-		"	xor	%ax, %ax	\n"
-		"	mov	%ax, %ds	\n"
-		"	lidt	__myidt		\n"
-
-		/* Dump zeros in the other segregs */
-		"	mov	%ax, %es       	\n"
-		"	mov	%ax, %fs       	\n"
-		"	mov	%ax, %gs       	\n"
-		"	mov	$0x40, %ax	\n"
-		"	mov	%ax, %ds	\n"
-		"	mov	%cx, %ax	\n"
-
-		/* run VGA BIOS at 0xc000:0003 */
-		"	lcall	$0xc000, $0x0003\n"
-
-		/* if we got here, just about done. 
-		 * Need to get back to protected mode */
-		"	movl	%cr0, %eax	\n"
-		"	orl	$0x0000001, %eax\n" /* PE = 1 */
-		"	movl	%eax, %cr0	\n"
-
-		/* Now that we are in protected mode jump to a 32 bit code segment. */
-		"	data32	ljmp	$0x10, $vgarestart\n"
-		"vgarestart:\n"
-		"	.code32\n"
-		"	movw	$0x18, %ax     	\n"
-		"	mov	%ax, %ds       	\n"
-		"	mov	%ax, %es	\n"
-		"	mov	%ax, %fs	\n"
-		"	mov	%ax, %gs	\n"
-		"	mov	%ax, %ss	\n"
-
-		/* restore proper gdt and idt */
-		"	lgdt	%cs:gdtarg	\n"
-		"	lidt	idtarg		\n"
-
-		".globl vga_exit		\n"
-		"vga_exit:			\n"
-		"	mov	__stack, %esp	\n"
-		"	popal			\n"
-		);
-}
-
-__asm__ (".text\n""real_mode_switch_end:\n");
-extern char real_mode_switch_end[];
-
-/* call vga bios int 10 function 0x4f14 to enable main console 
-   epia-m does not always autosence the main console so forcing it on is good !! */ 
-void vga_enable_console()
-{
-	__asm__ __volatile__ (
-		/* paranoia -- does ecx get saved? not sure. This is 
-		 * the easiest safe thing to do. */
-		"	pushal			\n"
-		/* save the stack */
-		"	mov	%esp, __stack	\n"
-
-		/* load 'our' gdt */
-		"	lgdt 	%cs:__mygdtaddr	\n"
-
-		/*  This configures CS properly for real mode. */
-		"	ljmp 	$0x28, $__vga_ec_16bit\n"
-		"__vga_ec_16bit:		\n"
-		"	.code16			\n"
-		/* 16 bit code from here on... */
-
-		/* Load the segment registers w/ properly configured segment
-		 * descriptors.  They will retain these configurations (limits,
-		 * writability, etc.) once protected mode is turned off. */
-		"	mov	$0x30, %ax     	\n"
-		"	mov	%ax, %ds       	\n"
-		"	mov	%ax, %es       	\n"
-		"	mov	%ax, %fs       	\n"
-		"	mov	%ax, %gs       	\n"
-		"	mov	%ax, %ss       	\n"
-
-		/* Turn off protection (bit 0 in CR0) */
-		"	movl	%cr0, %eax     	\n"
-		"	andl	$0xFFFFFFFE, %eax\n"
-		"	movl	%eax, %cr0     	\n"
-
-		/* Now really going into real mode */
-		"	ljmp	$0, $__vga_ec_real \n"
-		"__vga_ec_real:                  \n"
-
-		/* put the stack at the end of page zero. 
-		 * that way we can easily share it between real and protected, 
-		 * since the 16-bit ESP at segment 0 will work for any case. 
-		/* Setup a stack */
-		"	mov	$0x0, %ax	\n"
-		"	mov	%ax, %ss	\n"
-		"	movl	$0x1000, %eax	\n"
-		"	movl	%eax, %esp	\n"
-
-		/* debugging for RGM */
-		"	mov	$0x11, %al	\n"
-		"	outb	%al, $0x80	\n"
-
-		/* Load our 16 it idt */
-		"	xor	%ax, %ax       	\n"
-		"	mov	%ax, %ds	\n"
-		"	lidt	__myidt		\n"
-
-		/* Dump zeros in the other segregs */
-		"	mov	%ax, %ds	\n"
-		"	mov	%ax, %es	\n"
-		"	mov	%ax, %fs	\n"
-		"	mov	%ax, %gs	\n"
-
-		/* ask bios to enable main console */
-		/* set up for int 10 call - values found from X server
-		 * bios call routines */
-		//"	movw	$0x4f14,%ax	\n"
-		"	movw	$0x0002,%ax	\n"
-		//"	movw	$0x8003,%bx	\n"
-		"	movw	$1, %cx		\n"
-		"	movw	$0, %dx		\n"
-		"	movw	$0, %di		\n"
-		"	int	$0x10		\n"
-
-		"	movb	$0x55, %al	\n"
-		"	outb	%al, $0x80	\n"
-
-		/* if we got here, just about done. 
-		 * Need to get back to protected mode */
-		"	movl	%cr0, %eax	\n"
-		"	orl	$0x0000001, %eax\n" /* PE = 1 */
-		"	movl	%eax, %cr0	\n"
-
-		/* Now that we are in protected mode jump to a 32 bit code segment. */
-		"	data32	ljmp	$0x10, $vga_ec_restart\n"
-		"vga_ec_restart:\n"
-		"	.code32\n"
-		"	movw	$0x18, %ax	\n"
-		"	mov	%ax, %ds	\n"
-		"	mov	%ax, %es	\n"
-		"	mov	%ax, %fs	\n"
-		"	mov	%ax, %gs	\n"
-		"	mov	%ax, %ss	\n"
-
-		/* restore proper gdt and idt */
-		"	lgdt	%cs:gdtarg 	\n"
-		"	lidt	idtarg		\n"
-		"	.globl	vga__ec_exit	\n"
-		"vga_ec_exit:\n"
-		"	mov	__stack, %esp	\n"
-		"	popal\n"
-		);
-}
-
-void do_vgabios(void)
-{
-	device_t dev;
-	unsigned long busdevfn;
-	unsigned int rom = 0;
-	unsigned char *buf;
-	unsigned int size = 64*1024;
-	int i;
-	
-	/* clear vga bios data area */
-	for (i = 0x400; i < 0x500; i++) {
-		*(unsigned char *) i = 0;
-	}
-
-	dev = dev_find_class(PCI_CLASS_DISPLAY_VGA<<8 , 0);
-
-	if (!dev) {
-		printk_debug("NO VGA FOUND\n");
-		return;
-	}
-	printk_debug("found VGA: vid=%x, did=%x\n", dev->vendor, dev->device);
-
-	/* declare rom address here - keep any config data out of the way
-	 * of core LXB stuff */
-
-	rom = 0xc0000;
-	// pci_write_config32(dev, PCI_ROM_ADDRESS, rom|1);
-	printk_debug("rom base, size: %x\n", rom);
-
-	buf = (unsigned char *) rom;
-	if ((buf[0] == 0x55) && (buf[1] == 0xaa)) {
-		memcpy((void *) 0xc0000, buf, size);
-
-		// write_protect_vgabios();  // in northbridge
-
-	  	// check signature again
-		buf = (unsigned char *) 0xc0000;
-		if (buf[0]==0x55 && buf[1]==0xAA) {
-			busdevfn = (dev->bus->secondary << 8) | dev->path.pci.devfn;
-			printk_debug("bus/devfn = %#x\n", busdevfn);
-
-		    	real_mode_switch_call_vga(busdevfn);
-		} else
-			printk_debug("Failed to copy VGA BIOS to 0xc0000\n");
-	} else 
-		printk_debug("BAD SIGNATURE 0x%x 0x%x\n", buf[0], buf[1]);
-
-	pci_write_config32(dev, PCI_ROM_ADDRESS, 0);
-}
-
-
-// we had hoped to avoid this. 
-// this is a stub IDT only. It's main purpose is to ignore calls 
-// to the BIOS. 
-// no longer. Dammit. We have to respond to these.
-struct realidt {
-	unsigned short offset, cs;
-}; 
-
-// from a handy writeup that andrey found.
-
-// handler. 
-// There are some assumptions we can make here. 
-// First, the Top Of Stack (TOS) is located on the top of page zero. 
-// we can share this stack between real and protected mode. 
-// that simplifies a lot of things ...
-// we'll just push all the registers on the stack as longwords, 
-// and pop to protected mode. 
-// second, since this only ever runs as part of coreboot, 
-// we know all the segment register values -- so we don't save any.
-// keep the handler that calls things small. It can do a call to 
-// more complex code in coreboot itself. This helps a lot as we don't
-// have to do address fixup in this little stub, and calls are absolute
-// so the handler is relocatable.
-void handler(void)
-{
-	__asm__ __volatile__ ( 
-		"	.code16		\n"
-		"idthandle:		\n"
-		"	pushal		\n"
-		"	movb 	$0, %al	\n"
-		"	ljmp 	$0, $callbiosint16\n"
-		"end_idthandle:		\n"
-		"	.code32		\n"
-		);
-}
-
-void debughandler(void)
-{
-	__asm__ __volatile__ ( 
-		"	.code16		\n"
-		"debughandle:		\n"
-		"	pushw	%cx	\n"
-		"	movw	$250, %cx \n"
-		"dbh1:			\n"
-		"	loop	dbh1	\n"
-		"	popw	%cx	\n"
-		"	iret		\n"
-		"end_debughandle:	\n"
-		".code32		\n"
-		);
-}
-
-// Calling conventions. The first C function is called with this stuff
-// on the stack. They look like value parameters, but note that if you
-// modify them they will go back to the INTx function modified. 
-// the C function will call the biosint function with these as
-// REFERENCE parameters. In this way, we can easily get 
-// returns back to the INTx caller (i.e. vgabios)
-void callbiosint(void)
-{
-	__asm__ __volatile__ (
-		"	.code16		\n"
-		"callbiosint16:		\n"
-		"	push	%ds	\n"
-		"	push	%es	\n"
-		"	push	%fs	\n"
-		"	push	%gs	\n"
-		// clean up the int #. To save space we put it in the lower
-		// byte. But the top 24 bits are junk. 
-		"	andl	$0xff, %eax\n"
-		// this push does two things:
-		// - put the INT # on the stack as a parameter
-		// - provides us with a temp for the %cr0 mods.
-		"	pushl	%eax	\n"
-		"	movl    %cr0, %eax\n"
-		"	orl	$0x00000001, %eax\n" /* PE = 1 */
-		"	movl	%eax, %cr0\n"
-		/* Now that we are in protected mode jump to a 32 bit code segment. */
-		"	data32  ljmp    $0x10, $biosprotect\n"
-		"biosprotect:		\n"
-		"	.code32		\n"
-		"	movw	$0x18, %ax          \n"
-		"	mov	%ax, %ds          \n"
-		"	mov	%ax, %es          \n"
-		"	mov	%ax, %fs          \n"
-		"	mov	%ax, %gs          \n"
-		"	mov	%ax, %ss          \n"
-		"	lidt	idtarg         \n"
-		"	call	biosint	\n"
-		// back to real mode ...
-		"	ljmp	$0x28, $__rms_16bit2\n"
-		"__rms_16bit2:			\n"
-		"	.code16			\n"
-		/* 16 bit code from here on... */
-		/* Load the segment registers w/ properly configured segment
-		 * descriptors.  They will retain these configurations (limits,
-		 * writability, etc.) once protected mode is turned off. */
-		"	mov	$0x30, %ax	\n"
-		"	mov	%ax, %ds	\n"
-		"	mov	%ax, %es	\n"
-		"	mov	%ax, %fs	\n"
-		"	mov	%ax, %gs	\n"
-		"	mov	%ax, %ss	\n"
-		
-		/* Turn off protection (bit 0 in CR0) */
-		"	movl	%cr0, %eax		\n"
-		"	andl	$0xFFFFFFFE, %eax	\n"
-		"	movl	%eax, %cr0		\n"
-
-		/* Now really going into real mode */
-		"	ljmp $0,  $__rms_real2	\n"
-		"__rms_real2:			\n"
-
-		/* Setup a stack
-		 * FixME: where is esp? */
-		"	mov	$0x0, %ax       \n"
-		"	mov	%ax, %ss	\n"
-
-		/* ebugging for RGM */
-		"	mov	$0x11, %al	\n"
-		"	outb	%al, $0x80	\n"
-
-		/* Load our 16 it idt */
-		"	xor	%ax, %ax	\n"
-		"	mov	%ax, %ds	\n"
-		"	lidt	__myidt		\n"
-
-		/* Dump zeros in the other segregs */
-		"	mov	%ax, %es	\n"
-		"	mov	%ax, %fs	\n"
-		"	mov	%ax, %gs	\n"
-		"	mov	$0x40, %ax	\n"
-		"	mov	%ax, %ds	\n"
-
-		/* pop the INT # that you pushed earlier */
-		"	popl	%eax		\n"
-		"	pop	%gs		\n"
-		"	pop	%fs		\n"
-		"	pop	%es		\n"
-		"	pop	%ds		\n"
-		"	popal			\n"
-		"	iret			\n"
-		"	.code32			\n"
-		);
-}
-
-enum {
-	PCIBIOS = 0x1a, 
-	MEMSIZE = 0x12
-};
-
-int pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
-	    unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
-	    unsigned long *pecx, unsigned long *peax, unsigned long *pflags);
-
-int handleint21(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
-		unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
-		unsigned long *pecx, unsigned long *peax, unsigned long *pflags
-        );
-
-extern void vga_exit(void);
-
-int biosint(unsigned long intnumber,
-	    unsigned long gsfs, unsigned long dses,
-	    unsigned long edi, unsigned long esi,
-	    unsigned long ebp, unsigned long esp, 
-	    unsigned long ebx, unsigned long edx, 
-	    unsigned long ecx, unsigned long eax, 
-	    unsigned long cs_ip, unsigned short stackflags)
-{
-	unsigned long ip; 
-	unsigned long cs; 
-	unsigned long flags;
-	int ret = -1;
-	
-	ip = cs_ip & 0xffff;
-	cs = cs_ip >> 16;
-	flags = stackflags;
-	
-	printk_debug("biosint: INT# 0x%lx\n", intnumber);
-	printk_debug("biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n", 
-		      eax, ebx, ecx, edx);
-	printk_debug("biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n",
-		     ebp, esp, edi, esi);
-	printk_debug("biosint:  ip 0x%x   cs 0x%x  flags 0x%x\n",
-		     ip, cs, flags);
-
-	// cases in a good compiler are just as good as your own tables. 
-	switch (intnumber) {
-	case 0 ... 15:
-		// These are not BIOS service, but the CPU-generated exceptions
-		printk_info("biosint: Oops, exception %u\n", intnumber);
-		if (esp < 0x1000) {
-			printk_debug("Stack contents: ");
-			while (esp < 0x1000) {
-				printk_debug("0x%04x ", *(unsigned short *) esp);
-				esp += 2;
-			}
-			printk_debug("\n");
-		}
-		printk_debug("biosint: Bailing out\n");
-		// "longjmp"
-		vga_exit();
-		break;
-		
-	case PCIBIOS:
-		ret = pcibios( &edi, &esi, &ebp, &esp, 
-			       &ebx, &edx, &ecx, &eax, &flags);
-		break;
-	case MEMSIZE: 
-		// who cares. 
-		eax = 64 * 1024;
-		ret = 0;
-		break;
-	case 0x15:
-		ret=handleint21( &edi, &esi, &ebp, &esp, 
-				&ebx, &edx, &ecx, &eax, &flags);
-		break;
-	default:
-		printk_info("BIOSINT: Unsupport int #0x%x\n", 
-			    intnumber);
-		break;
-	}
-	if (ret)
-		flags |= 1; // carry flags
-	else
-		flags &= ~1;
-	stackflags = flags;
-	return ret;
-} 
-
-
-void setup_realmode_idt(void) 
-{
-	extern unsigned char idthandle, end_idthandle;
-	extern unsigned char debughandle, end_debughandle;
-
-	int i;
-	struct realidt *idts = (struct realidt *) 0;
-	int codesize = &end_idthandle - &idthandle;
-	unsigned char *intbyte, *codeptr;
-	
-	// for each int, we create a customized little handler
-	// that just pushes %ax, puts the int # in %al, 
-	// then calls the common interrupt handler. 
-	// this necessitated because intel didn't know much about 
-	// architecture when they did the 8086 (it shows)
-	// (hmm do they know anymore even now :-)
-	// obviously you can see I don't really care about memory 
-	// efficiency. If I did I would probe back through the stack
-	// and get it that way. But that's really disgusting.
-	for (i = 0; i < 256; i++) {
-		idts[i].cs = 0;
-		codeptr = (char*) 4096 + i * codesize;
-		idts[i].offset = (unsigned) codeptr;
-		memcpy(codeptr, &idthandle, codesize);
-		intbyte = codeptr + 3;
-		*intbyte = i;
-	}
-	
-	// fixed entry points
-	
-	// VGA BIOSes tend to hardcode f000:f065 as the previous handler of
-	// int10. 
-	// calling convention here is the same as INTs, we can reuse
-	// the int entry code.
-	codeptr = (char*) 0xff065;
-	memcpy(codeptr, &idthandle, codesize);
-	intbyte = codeptr + 3;
-	*intbyte = 0x42; /* int42 is the relocated int10 */
-
-	/* debug handler - useful to set a programmable delay between instructions if the
-	   TF bit is set upon call to real mode */
-	idts[1].cs = 0;
-	idts[1].offset = 16384;
-	memcpy(16384, &debughandle, &end_debughandle - &debughandle);
-
-	
-}
-
-
-
-enum {
-	CHECK = 0xb001,
-	FINDDEV = 0xb102,
-	READCONFBYTE = 0xb108,
-	READCONFWORD = 0xb109,
-	READCONFDWORD = 0xb10a,
-	WRITECONFBYTE = 0xb10b,
-	WRITECONFWORD = 0xb10c,
-	WRITECONFDWORD = 0xb10d
-};
-
-// errors go in AH. Just set these up so that word assigns
-// will work. KISS. 
-enum {
-	PCIBIOS_NODEV = 0x8600,
-	PCIBIOS_BADREG = 0x8700
-};
-
-int
-pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, 
-	unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, 
-	unsigned long *pecx, unsigned long *peax, unsigned long *pflags)
-{
-	unsigned long edi = *pedi;
-	unsigned long esi = *pesi;
-	unsigned long ebp = *pebp;
-	unsigned long esp = *pesp;
-	unsigned long ebx = *pebx;
-	unsigned long edx = *pedx;
-	unsigned long ecx = *pecx;
-	unsigned long eax = *peax;
-	unsigned long flags = *pflags;
-	unsigned short func = (unsigned short) eax;
-	int retval = 0;
-	unsigned short devid, vendorid, devfn;
-	short devindex; /* Use short to get rid of gabage in upper half of 32-bit register */
-	unsigned char bus;
-	device_t dev;
-	
-	switch(func) {
-	case  CHECK:
-		*pedx = 0x4350;
-		*pecx = 0x2049;
-		retval = 0;
-		break;
-	case FINDDEV:
-	{
-		devid = *pecx;
-		vendorid = *pedx;
-		devindex = *pesi;
-		dev = 0;
-		while ((dev = dev_find_device(vendorid, devid, dev))) {
-			if (devindex <= 0)
-				break;
-			devindex--;
-		}
-		if (dev) {
-			unsigned short busdevfn;
-			*peax = 0;
-			// busnum is an unsigned char;
-			// devfn is an int, so we mask it off. 
-			busdevfn = (dev->bus->secondary << 8)
-				| (dev->path.pci.devfn & 0xff);
-			printk_debug("0x%x: return 0x%x\n", func, busdevfn);
-			*pebx = busdevfn;
-			retval = 0;
-		} else {
-			*peax = PCIBIOS_NODEV;
-			retval = -1;
-		}
-	}
-	break;
-	case READCONFDWORD:
-	case READCONFWORD:
-	case READCONFBYTE:
-	case WRITECONFDWORD:
-	case WRITECONFWORD:
-	case WRITECONFBYTE:
-	{
-		unsigned long dword;
-		unsigned short word;
-		unsigned char byte;
-		unsigned char reg;
-		
-		devfn = *pebx & 0xff;
-		bus = *pebx >> 8;
-		reg = *pedi;
-		dev = dev_find_slot(bus, devfn);
-		if (! dev) {
-			printk_debug("0x%x: BAD DEVICE bus %d devfn 0x%x\n", func, bus, devfn);
-			// idiots. the pcibios guys assumed you'd never pass a bad bus/devfn!
-			*peax = PCIBIOS_BADREG;
-			retval = -1;
-		}
-		switch(func) {
-		case READCONFBYTE:
-			byte = pci_read_config8(dev, reg);
-			*pecx = byte;
-			break;
-		case READCONFWORD:
-			word = pci_read_config16(dev, reg);
-			*pecx = word;
-			break;
-		case READCONFDWORD:
-			dword = pci_read_config32(dev, reg);
-			*pecx = dword;
-			break;
-		case WRITECONFBYTE:
-			byte = *pecx;
-			pci_write_config8(dev, reg, byte);
-			break;
-		case WRITECONFWORD:
-			word = *pecx;
-			pci_write_config16(dev, reg, word);
-			break;
-		case WRITECONFDWORD:
-			dword = *pecx;
-			pci_write_config32(dev, reg, dword);
-			break;
-		}
-		
-		if (retval) 
-			retval = PCIBIOS_BADREG;
-		printk_debug("0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n",
-			     func, bus, devfn, reg, *pecx);
-		*peax = 0;
-		retval = 0;
-	}
-	break;
-	default:
-		printk_err("UNSUPPORTED PCIBIOS FUNCTION 0x%x\n",  func);
-		break;
-	}
-	
-	return retval;
-} 
-
-int handleint21(unsigned long *edi, unsigned long *esi, unsigned long *ebp,
-		unsigned long *esp, unsigned long *ebx, unsigned long *edx,
-		unsigned long *ecx, unsigned long *eax, unsigned long *flags)
-{
-	int res=-1;
-	switch(*eax&0xffff)
-	{
-	case 0x5f19:
-		break;
-	case 0x5f18:
-		*eax=0x5f;
-		*ebx=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory
-		*ecx=0x060;
-		res=0;
-		break;
-	case 0x5f00:
-		*eax = 0x8600;
-		break;
-	case 0x5f01:
-		*eax = 0x5f;
-		*ecx = (*ecx & 0xffffff00 ) | 2; // panel type =  2 = 1024 * 768
-		res = 0;
-		break;
-	case 0x5f02:
-		*eax=0x5f;
-		*ebx= (*ebx & 0xffff0000) | 2;
-		*ecx= (*ecx & 0xffff0000) | 0x401;  // PAL + crt only 
-		*edx= (*edx & 0xffff0000) | 0;  // TV Layout - default
-		res=0;
-		break;
-	case 0x5f0f:
-		*eax=0x860f;
-		break;
-	}
-	return res;
-}