Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

12 files changed, 4198 insertions, 0 deletions

diff --git a/arch/i386/boot/Makefile b/arch/i386/boot/Makefile
new file mode 100644
index 0000000..aa7064a
--- /dev/null
+++ b/arch/i386/boot/Makefile
@@ -0,0 +1,104 @@
+#
+# arch/i386/boot/Makefile
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 1994 by Linus Torvalds
+#
+
+# ROOT_DEV specifies the default root-device when making the image.
+# This can be either FLOPPY, CURRENT, /dev/xxxx or empty, in which case
+# the default of FLOPPY is used by 'build'.
+
+ROOT_DEV := CURRENT
+
+# If you want to preset the SVGA mode, uncomment the next line and
+# set SVGA_MODE to whatever number you want.
+# Set it to -DSVGA_MODE=NORMAL_VGA if you just want the EGA/VGA mode.
+# The number is the same as you would ordinarily press at bootup.
+
+SVGA_MODE := -DSVGA_MODE=NORMAL_VGA
+
+# If you want the RAM disk device, define this to be the size in blocks.
+
+#RAMDISK := -DRAMDISK=512
+
+targets		:= vmlinux.bin bootsect bootsect.o setup setup.o \
+		   zImage bzImage
+subdir- 	:= compressed
+
+hostprogs-y	:= tools/build
+
+HOSTCFLAGS_build.o := $(LINUXINCLUDE)
+
+# ---------------------------------------------------------------------------
+
+$(obj)/zImage:  IMAGE_OFFSET := 0x1000
+$(obj)/zImage:  EXTRA_AFLAGS := -traditional $(SVGA_MODE) $(RAMDISK)
+$(obj)/bzImage: IMAGE_OFFSET := 0x100000
+$(obj)/bzImage: EXTRA_AFLAGS := -traditional $(SVGA_MODE) $(RAMDISK) -D__BIG_KERNEL__
+$(obj)/bzImage: BUILDFLAGS   := -b
+
+quiet_cmd_image = BUILD   $@
+cmd_image = $(obj)/tools/build $(BUILDFLAGS) $(obj)/bootsect $(obj)/setup \
+	    $(obj)/vmlinux.bin $(ROOT_DEV) > $@
+
+$(obj)/zImage $(obj)/bzImage: $(obj)/bootsect $(obj)/setup \
+			      $(obj)/vmlinux.bin $(obj)/tools/build FORCE
+	$(call if_changed,image)
+	@echo 'Kernel: $@ is ready'
+
+$(obj)/vmlinux.bin: $(obj)/compressed/vmlinux FORCE
+	$(call if_changed,objcopy)
+
+LDFLAGS_bootsect := -Ttext 0x0 -s --oformat binary
+LDFLAGS_setup	 := -Ttext 0x0 -s --oformat binary -e begtext
+
+$(obj)/setup $(obj)/bootsect: %: %.o FORCE
+	$(call if_changed,ld)
+
+$(obj)/compressed/vmlinux: FORCE
+	$(Q)$(MAKE) $(build)=$(obj)/compressed IMAGE_OFFSET=$(IMAGE_OFFSET) $@
+
+# Set this if you want to pass append arguments to the zdisk/fdimage kernel
+FDARGS = 
+
+$(obj)/mtools.conf: $(src)/mtools.conf.in
+	sed -e 's|@OBJ@|$(obj)|g' < $< > $@
+
+# This requires write access to /dev/fd0
+zdisk: $(BOOTIMAGE) $(obj)/mtools.conf
+	MTOOLSRC=$(obj)/mtools.conf mformat a:			; sync
+	syslinux /dev/fd0					; sync
+	echo 'default linux $(FDARGS)' | \
+		MTOOLSRC=$(src)/mtools.conf mcopy - a:syslinux.cfg
+	MTOOLSRC=$(obj)/mtools.conf mcopy $(BOOTIMAGE) a:linux	; sync
+
+# These require being root or having syslinux 2.02 or higher installed
+fdimage fdimage144: $(BOOTIMAGE) $(obj)/mtools.conf
+	dd if=/dev/zero of=$(obj)/fdimage bs=1024 count=1440
+	MTOOLSRC=$(obj)/mtools.conf mformat v:			; sync
+	syslinux $(obj)/fdimage					; sync
+	echo 'default linux $(FDARGS)' | \
+		MTOOLSRC=$(obj)/mtools.conf mcopy - v:syslinux.cfg
+	MTOOLSRC=$(obj)/mtools.conf mcopy $(BOOTIMAGE) v:linux	; sync
+
+fdimage288: $(BOOTIMAGE) $(obj)/mtools.conf
+	dd if=/dev/zero of=$(obj)/fdimage bs=1024 count=2880
+	MTOOLSRC=$(obj)/mtools.conf mformat w:			; sync
+	syslinux $(obj)/fdimage					; sync
+	echo 'default linux $(FDARGS)' | \
+		MTOOLSRC=$(obj)/mtools.conf mcopy - w:syslinux.cfg
+	MTOOLSRC=$(obj)/mtools.conf mcopy $(BOOTIMAGE) w:linux	; sync
+
+zlilo: $(BOOTIMAGE)
+	if [ -f $(INSTALL_PATH)/vmlinuz ]; then mv $(INSTALL_PATH)/vmlinuz $(INSTALL_PATH)/vmlinuz.old; fi
+	if [ -f $(INSTALL_PATH)/System.map ]; then mv $(INSTALL_PATH)/System.map $(INSTALL_PATH)/System.old; fi
+	cat $(BOOTIMAGE) > $(INSTALL_PATH)/vmlinuz
+	cp System.map $(INSTALL_PATH)/
+	if [ -x /sbin/lilo ]; then /sbin/lilo; else /etc/lilo/install; fi
+
+install: $(BOOTIMAGE)
+	sh $(srctree)/$(src)/install.sh $(KERNELRELEASE) $< System.map "$(INSTALL_PATH)"
diff --git a/arch/i386/boot/bootsect.S b/arch/i386/boot/bootsect.S
new file mode 100644
index 0000000..ba9fe14d
--- /dev/null
+++ b/arch/i386/boot/bootsect.S
@@ -0,0 +1,98 @@
+/*
+ *	bootsect.S		Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ *	modified by Drew Eckhardt
+ *	modified by Bruce Evans (bde)
+ *	modified by Chris Noe (May 1999) (as86 -> gas)
+ *	gutted by H. Peter Anvin (Jan 2003)
+ *
+ * BIG FAT NOTE: We're in real mode using 64k segments.  Therefore segment
+ * addresses must be multiplied by 16 to obtain their respective linear
+ * addresses. To avoid confusion, linear addresses are written using leading
+ * hex while segment addresses are written as segment:offset.
+ *
+ */
+
+#include <asm/boot.h>
+
+SETUPSECTS	= 4			/* default nr of setup-sectors */
+BOOTSEG		= 0x07C0		/* original address of boot-sector */
+INITSEG		= DEF_INITSEG		/* we move boot here - out of the way */
+SETUPSEG	= DEF_SETUPSEG		/* setup starts here */
+SYSSEG		= DEF_SYSSEG		/* system loaded at 0x10000 (65536) */
+SYSSIZE		= DEF_SYSSIZE		/* system size: # of 16-byte clicks */
+					/* to be loaded */
+ROOT_DEV	= 0 			/* ROOT_DEV is now written by "build" */
+SWAP_DEV	= 0			/* SWAP_DEV is now written by "build" */
+
+#ifndef SVGA_MODE
+#define SVGA_MODE ASK_VGA
+#endif
+
+#ifndef RAMDISK
+#define RAMDISK 0
+#endif
+
+#ifndef ROOT_RDONLY
+#define ROOT_RDONLY 1
+#endif
+
+.code16
+.text
+
+.global _start
+_start:
+
+	# Normalize the start address
+	jmpl	$BOOTSEG, $start2
+
+start2:
+	movw	%cs, %ax
+	movw	%ax, %ds
+	movw	%ax, %es
+	movw	%ax, %ss
+	movw	$0x7c00, %sp
+	sti
+	cld
+
+	movw	$bugger_off_msg, %si
+
+msg_loop:
+	lodsb
+	andb	%al, %al
+	jz	die
+	movb	$0xe, %ah
+	movw	$7, %bx
+	int	$0x10
+	jmp	msg_loop
+
+die:
+	# Allow the user to press a key, then reboot
+	xorw	%ax, %ax
+	int	$0x16
+	int	$0x19
+
+	# int 0x19 should never return.  In case it does anyway,
+	# invoke the BIOS reset code...
+	ljmp	$0xf000,$0xfff0
+
+
+bugger_off_msg:
+	.ascii	"Direct booting from floppy is no longer supported.\r\n"
+	.ascii	"Please use a boot loader program instead.\r\n"
+	.ascii	"\n"
+	.ascii	"Remove disk and press any key to reboot . . .\r\n"
+	.byte	0
+	
+
+	# Kernel attributes; used by setup
+
+	.org 497
+setup_sects:	.byte SETUPSECTS
+root_flags:	.word ROOT_RDONLY
+syssize:	.word SYSSIZE
+swap_dev:	.word SWAP_DEV
+ram_size:	.word RAMDISK
+vid_mode:	.word SVGA_MODE
+root_dev:	.word ROOT_DEV
+boot_flag:	.word 0xAA55
diff --git a/arch/i386/boot/compressed/Makefile b/arch/i386/boot/compressed/Makefile
new file mode 100644
index 0000000..258ea95
--- /dev/null
+++ b/arch/i386/boot/compressed/Makefile
@@ -0,0 +1,25 @@
+#
+# linux/arch/i386/boot/compressed/Makefile
+#
+# create a compressed vmlinux image from the original vmlinux
+#
+
+targets		:= vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o
+EXTRA_AFLAGS	:= -traditional
+
+LDFLAGS_vmlinux := -Ttext $(IMAGE_OFFSET) -e startup_32
+
+$(obj)/vmlinux: $(obj)/head.o $(obj)/misc.o $(obj)/piggy.o FORCE
+	$(call if_changed,ld)
+	@:
+
+$(obj)/vmlinux.bin: vmlinux FORCE
+	$(call if_changed,objcopy)
+
+$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,gzip)
+
+LDFLAGS_piggy.o := -r --format binary --oformat elf32-i386 -T
+
+$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE
+	$(call if_changed,ld)
diff --git a/arch/i386/boot/compressed/head.S b/arch/i386/boot/compressed/head.S
new file mode 100644
index 0000000..c5e80b6
--- /dev/null
+++ b/arch/i386/boot/compressed/head.S
@@ -0,0 +1,128 @@
+/*
+ *  linux/boot/head.S
+ *
+ *  Copyright (C) 1991, 1992, 1993  Linus Torvalds
+ */
+
+/*
+ *  head.S contains the 32-bit startup code.
+ *
+ * NOTE!!! Startup happens at absolute address 0x00001000, which is also where
+ * the page directory will exist. The startup code will be overwritten by
+ * the page directory. [According to comments etc elsewhere on a compressed
+ * kernel it will end up at 0x1000 + 1Mb I hope so as I assume this. - AC]
+ *
+ * Page 0 is deliberately kept safe, since System Management Mode code in 
+ * laptops may need to access the BIOS data stored there.  This is also
+ * useful for future device drivers that either access the BIOS via VM86 
+ * mode.
+ */
+
+/*
+ * High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
+ */
+.text
+
+#include <linux/linkage.h>
+#include <asm/segment.h>
+
+	.globl startup_32
+	
+startup_32:
+	cld
+	cli
+	movl $(__BOOT_DS),%eax
+	movl %eax,%ds
+	movl %eax,%es
+	movl %eax,%fs
+	movl %eax,%gs
+
+	lss stack_start,%esp
+	xorl %eax,%eax
+1:	incl %eax		# check that A20 really IS enabled
+	movl %eax,0x000000	# loop forever if it isn't
+	cmpl %eax,0x100000
+	je 1b
+
+/*
+ * Initialize eflags.  Some BIOS's leave bits like NT set.  This would
+ * confuse the debugger if this code is traced.
+ * XXX - best to initialize before switching to protected mode.
+ */
+	pushl $0
+	popfl
+/*
+ * Clear BSS
+ */
+	xorl %eax,%eax
+	movl $_edata,%edi
+	movl $_end,%ecx
+	subl %edi,%ecx
+	cld
+	rep
+	stosb
+/*
+ * Do the decompression, and jump to the new kernel..
+ */
+	subl $16,%esp	# place for structure on the stack
+	movl %esp,%eax
+	pushl %esi	# real mode pointer as second arg
+	pushl %eax	# address of structure as first arg
+	call decompress_kernel
+	orl  %eax,%eax 
+	jnz  3f
+	popl %esi	# discard address
+	popl %esi	# real mode pointer
+	xorl %ebx,%ebx
+	ljmp $(__BOOT_CS), $0x100000
+
+/*
+ * We come here, if we were loaded high.
+ * We need to move the move-in-place routine down to 0x1000
+ * and then start it with the buffer addresses in registers,
+ * which we got from the stack.
+ */
+3:
+	movl $move_routine_start,%esi
+	movl $0x1000,%edi
+	movl $move_routine_end,%ecx
+	subl %esi,%ecx
+	addl $3,%ecx
+	shrl $2,%ecx
+	cld
+	rep
+	movsl
+
+	popl %esi	# discard the address
+	popl %ebx	# real mode pointer
+	popl %esi	# low_buffer_start
+	popl %ecx	# lcount
+	popl %edx	# high_buffer_start
+	popl %eax	# hcount
+	movl $0x100000,%edi
+	cli		# make sure we don't get interrupted
+	ljmp $(__BOOT_CS), $0x1000 # and jump to the move routine
+
+/*
+ * Routine (template) for moving the decompressed kernel in place,
+ * if we were high loaded. This _must_ PIC-code !
+ */
+move_routine_start:
+	movl %ecx,%ebp
+	shrl $2,%ecx
+	rep
+	movsl
+	movl %ebp,%ecx
+	andl $3,%ecx
+	rep
+	movsb
+	movl %edx,%esi
+	movl %eax,%ecx	# NOTE: rep movsb won't move if %ecx == 0
+	addl $3,%ecx
+	shrl $2,%ecx
+	rep
+	movsl
+	movl %ebx,%esi	# Restore setup pointer
+	xorl %ebx,%ebx
+	ljmp $(__BOOT_CS), $0x100000
+move_routine_end:
diff --git a/arch/i386/boot/compressed/misc.c b/arch/i386/boot/compressed/misc.c
new file mode 100644
index 0000000..fa67045
--- /dev/null
+++ b/arch/i386/boot/compressed/misc.c
@@ -0,0 +1,382 @@
+/*
+ * misc.c
+ * 
+ * This is a collection of several routines from gzip-1.0.3 
+ * adapted for Linux.
+ *
+ * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
+ * puts by Nick Holloway 1993, better puts by Martin Mares 1995
+ * High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
+ */
+
+#include <linux/linkage.h>
+#include <linux/vmalloc.h>
+#include <linux/tty.h>
+#include <video/edid.h>
+#include <asm/io.h>
+
+/*
+ * gzip declarations
+ */
+
+#define OF(args)  args
+#define STATIC static
+
+#undef memset
+#undef memcpy
+
+/*
+ * Why do we do this? Don't ask me..
+ *
+ * Incomprehensible are the ways of bootloaders.
+ */
+static void* memset(void *, int, size_t);
+static void* memcpy(void *, __const void *, size_t);
+#define memzero(s, n)     memset ((s), 0, (n))
+
+typedef unsigned char  uch;
+typedef unsigned short ush;
+typedef unsigned long  ulg;
+
+#define WSIZE 0x8000		/* Window size must be at least 32k, */
+				/* and a power of two */
+
+static uch *inbuf;	     /* input buffer */
+static uch window[WSIZE];    /* Sliding window buffer */
+
+static unsigned insize = 0;  /* valid bytes in inbuf */
+static unsigned inptr = 0;   /* index of next byte to be processed in inbuf */
+static unsigned outcnt = 0;  /* bytes in output buffer */
+
+/* gzip flag byte */
+#define ASCII_FLAG   0x01 /* bit 0 set: file probably ASCII text */
+#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
+#define EXTRA_FIELD  0x04 /* bit 2 set: extra field present */
+#define ORIG_NAME    0x08 /* bit 3 set: original file name present */
+#define COMMENT      0x10 /* bit 4 set: file comment present */
+#define ENCRYPTED    0x20 /* bit 5 set: file is encrypted */
+#define RESERVED     0xC0 /* bit 6,7:   reserved */
+
+#define get_byte()  (inptr < insize ? inbuf[inptr++] : fill_inbuf())
+		
+/* Diagnostic functions */
+#ifdef DEBUG
+#  define Assert(cond,msg) {if(!(cond)) error(msg);}
+#  define Trace(x) fprintf x
+#  define Tracev(x) {if (verbose) fprintf x ;}
+#  define Tracevv(x) {if (verbose>1) fprintf x ;}
+#  define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
+#  define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
+#else
+#  define Assert(cond,msg)
+#  define Trace(x)
+#  define Tracev(x)
+#  define Tracevv(x)
+#  define Tracec(c,x)
+#  define Tracecv(c,x)
+#endif
+
+static int  fill_inbuf(void);
+static void flush_window(void);
+static void error(char *m);
+static void gzip_mark(void **);
+static void gzip_release(void **);
+  
+/*
+ * This is set up by the setup-routine at boot-time
+ */
+static unsigned char *real_mode; /* Pointer to real-mode data */
+
+#define RM_EXT_MEM_K   (*(unsigned short *)(real_mode + 0x2))
+#ifndef STANDARD_MEMORY_BIOS_CALL
+#define RM_ALT_MEM_K   (*(unsigned long *)(real_mode + 0x1e0))
+#endif
+#define RM_SCREEN_INFO (*(struct screen_info *)(real_mode+0))
+
+extern char input_data[];
+extern int input_len;
+
+static long bytes_out = 0;
+static uch *output_data;
+static unsigned long output_ptr = 0;
+
+static void *malloc(int size);
+static void free(void *where);
+
+static void putstr(const char *);
+
+extern int end;
+static long free_mem_ptr = (long)&end;
+static long free_mem_end_ptr;
+
+#define INPLACE_MOVE_ROUTINE  0x1000
+#define LOW_BUFFER_START      0x2000
+#define LOW_BUFFER_MAX       0x90000
+#define HEAP_SIZE             0x3000
+static unsigned int low_buffer_end, low_buffer_size;
+static int high_loaded =0;
+static uch *high_buffer_start /* = (uch *)(((ulg)&end) + HEAP_SIZE)*/;
+
+static char *vidmem = (char *)0xb8000;
+static int vidport;
+static int lines, cols;
+
+#ifdef CONFIG_X86_NUMAQ
+static void * xquad_portio = NULL;
+#endif
+
+#include "../../../../lib/inflate.c"
+
+static void *malloc(int size)
+{
+	void *p;
+
+	if (size <0) error("Malloc error");
+	if (free_mem_ptr <= 0) error("Memory error");
+
+	free_mem_ptr = (free_mem_ptr + 3) & ~3;	/* Align */
+
+	p = (void *)free_mem_ptr;
+	free_mem_ptr += size;
+
+	if (free_mem_ptr >= free_mem_end_ptr)
+		error("Out of memory");
+
+	return p;
+}
+
+static void free(void *where)
+{	/* Don't care */
+}
+
+static void gzip_mark(void **ptr)
+{
+	*ptr = (void *) free_mem_ptr;
+}
+
+static void gzip_release(void **ptr)
+{
+	free_mem_ptr = (long) *ptr;
+}
+ 
+static void scroll(void)
+{
+	int i;
+
+	memcpy ( vidmem, vidmem + cols * 2, ( lines - 1 ) * cols * 2 );
+	for ( i = ( lines - 1 ) * cols * 2; i < lines * cols * 2; i += 2 )
+		vidmem[i] = ' ';
+}
+
+static void putstr(const char *s)
+{
+	int x,y,pos;
+	char c;
+
+	x = RM_SCREEN_INFO.orig_x;
+	y = RM_SCREEN_INFO.orig_y;
+
+	while ( ( c = *s++ ) != '\0' ) {
+		if ( c == '\n' ) {
+			x = 0;
+			if ( ++y >= lines ) {
+				scroll();
+				y--;
+			}
+		} else {
+			vidmem [ ( x + cols * y ) * 2 ] = c; 
+			if ( ++x >= cols ) {
+				x = 0;
+				if ( ++y >= lines ) {
+					scroll();
+					y--;
+				}
+			}
+		}
+	}
+
+	RM_SCREEN_INFO.orig_x = x;
+	RM_SCREEN_INFO.orig_y = y;
+
+	pos = (x + cols * y) * 2;	/* Update cursor position */
+	outb_p(14, vidport);
+	outb_p(0xff & (pos >> 9), vidport+1);
+	outb_p(15, vidport);
+	outb_p(0xff & (pos >> 1), vidport+1);
+}
+
+static void* memset(void* s, int c, size_t n)
+{
+	int i;
+	char *ss = (char*)s;
+
+	for (i=0;i<n;i++) ss[i] = c;
+	return s;
+}
+
+static void* memcpy(void* __dest, __const void* __src,
+			    size_t __n)
+{
+	int i;
+	char *d = (char *)__dest, *s = (char *)__src;
+
+	for (i=0;i<__n;i++) d[i] = s[i];
+	return __dest;
+}
+
+/* ===========================================================================
+ * Fill the input buffer. This is called only when the buffer is empty
+ * and at least one byte is really needed.
+ */
+static int fill_inbuf(void)
+{
+	if (insize != 0) {
+		error("ran out of input data");
+	}
+
+	inbuf = input_data;
+	insize = input_len;
+	inptr = 1;
+	return inbuf[0];
+}
+
+/* ===========================================================================
+ * Write the output window window[0..outcnt-1] and update crc and bytes_out.
+ * (Used for the decompressed data only.)
+ */
+static void flush_window_low(void)
+{
+    ulg c = crc;         /* temporary variable */
+    unsigned n;
+    uch *in, *out, ch;
+    
+    in = window;
+    out = &output_data[output_ptr]; 
+    for (n = 0; n < outcnt; n++) {
+	    ch = *out++ = *in++;
+	    c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
+    }
+    crc = c;
+    bytes_out += (ulg)outcnt;
+    output_ptr += (ulg)outcnt;
+    outcnt = 0;
+}
+
+static void flush_window_high(void)
+{
+    ulg c = crc;         /* temporary variable */
+    unsigned n;
+    uch *in,  ch;
+    in = window;
+    for (n = 0; n < outcnt; n++) {
+	ch = *output_data++ = *in++;
+	if ((ulg)output_data == low_buffer_end) output_data=high_buffer_start;
+	c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
+    }
+    crc = c;
+    bytes_out += (ulg)outcnt;
+    outcnt = 0;
+}
+
+static void flush_window(void)
+{
+	if (high_loaded) flush_window_high();
+	else flush_window_low();
+}
+
+static void error(char *x)
+{
+	putstr("\n\n");
+	putstr(x);
+	putstr("\n\n -- System halted");
+
+	while(1);	/* Halt */
+}
+
+#define STACK_SIZE (4096)
+
+long user_stack [STACK_SIZE];
+
+struct {
+	long * a;
+	short b;
+	} stack_start = { & user_stack [STACK_SIZE] , __BOOT_DS };
+
+static void setup_normal_output_buffer(void)
+{
+#ifdef STANDARD_MEMORY_BIOS_CALL
+	if (RM_EXT_MEM_K < 1024) error("Less than 2MB of memory");
+#else
+	if ((RM_ALT_MEM_K > RM_EXT_MEM_K ? RM_ALT_MEM_K : RM_EXT_MEM_K) < 1024) error("Less than 2MB of memory");
+#endif
+	output_data = (char *)0x100000; /* Points to 1M */
+	free_mem_end_ptr = (long)real_mode;
+}
+
+struct moveparams {
+	uch *low_buffer_start;  int lcount;
+	uch *high_buffer_start; int hcount;
+};
+
+static void setup_output_buffer_if_we_run_high(struct moveparams *mv)
+{
+	high_buffer_start = (uch *)(((ulg)&end) + HEAP_SIZE);
+#ifdef STANDARD_MEMORY_BIOS_CALL
+	if (RM_EXT_MEM_K < (3*1024)) error("Less than 4MB of memory");
+#else
+	if ((RM_ALT_MEM_K > RM_EXT_MEM_K ? RM_ALT_MEM_K : RM_EXT_MEM_K) <
+			(3*1024))
+		error("Less than 4MB of memory");
+#endif	
+	mv->low_buffer_start = output_data = (char *)LOW_BUFFER_START;
+	low_buffer_end = ((unsigned int)real_mode > LOW_BUFFER_MAX
+	  ? LOW_BUFFER_MAX : (unsigned int)real_mode) & ~0xfff;
+	low_buffer_size = low_buffer_end - LOW_BUFFER_START;
+	high_loaded = 1;
+	free_mem_end_ptr = (long)high_buffer_start;
+	if ( (0x100000 + low_buffer_size) > ((ulg)high_buffer_start)) {
+		high_buffer_start = (uch *)(0x100000 + low_buffer_size);
+		mv->hcount = 0; /* say: we need not to move high_buffer */
+	}
+	else mv->hcount = -1;
+	mv->high_buffer_start = high_buffer_start;
+}
+
+static void close_output_buffer_if_we_run_high(struct moveparams *mv)
+{
+	if (bytes_out > low_buffer_size) {
+		mv->lcount = low_buffer_size;
+		if (mv->hcount)
+			mv->hcount = bytes_out - low_buffer_size;
+	} else {
+		mv->lcount = bytes_out;
+		mv->hcount = 0;
+	}
+}
+
+
+asmlinkage int decompress_kernel(struct moveparams *mv, void *rmode)
+{
+	real_mode = rmode;
+
+	if (RM_SCREEN_INFO.orig_video_mode == 7) {
+		vidmem = (char *) 0xb0000;
+		vidport = 0x3b4;
+	} else {
+		vidmem = (char *) 0xb8000;
+		vidport = 0x3d4;
+	}
+
+	lines = RM_SCREEN_INFO.orig_video_lines;
+	cols = RM_SCREEN_INFO.orig_video_cols;
+
+	if (free_mem_ptr < 0x100000) setup_normal_output_buffer();
+	else setup_output_buffer_if_we_run_high(mv);
+
+	makecrc();
+	putstr("Uncompressing Linux... ");
+	gunzip();
+	putstr("Ok, booting the kernel.\n");
+	if (high_loaded) close_output_buffer_if_we_run_high(mv);
+	return high_loaded;
+}
diff --git a/arch/i386/boot/compressed/vmlinux.scr b/arch/i386/boot/compressed/vmlinux.scr
new file mode 100644
index 0000000..1ed9d79
--- /dev/null
+++ b/arch/i386/boot/compressed/vmlinux.scr
@@ -0,0 +1,9 @@
+SECTIONS
+{
+  .data : { 
+	input_len = .;
+	LONG(input_data_end - input_data) input_data = .; 
+	*(.data) 
+	input_data_end = .; 
+	}
+}
diff --git a/arch/i386/boot/edd.S b/arch/i386/boot/edd.S
new file mode 100644
index 0000000..027d6b3
--- /dev/null
+++ b/arch/i386/boot/edd.S
@@ -0,0 +1,176 @@
+/*
+ * BIOS Enhanced Disk Drive support
+ * Copyright (C) 2002, 2003, 2004 Dell, Inc.
+ * by Matt Domsch <Matt_Domsch@dell.com> October 2002
+ * conformant to T13 Committee www.t13.org
+ *   projects 1572D, 1484D, 1386D, 1226DT
+ * disk signature read by Matt Domsch <Matt_Domsch@dell.com>
+ *	and Andrew Wilks <Andrew_Wilks@dell.com> September 2003, June 2004
+ * legacy CHS retreival by Patrick J. LoPresti <patl@users.sourceforge.net>
+ *      March 2004
+ * Command line option parsing, Matt Domsch, November 2004
+ */
+
+#include <linux/edd.h>
+#include <asm/setup.h>
+
+#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
+	movb	$0, (EDD_MBR_SIG_NR_BUF)
+	movb	$0, (EDDNR)
+
+# Check the command line for two options:
+# edd=of  disables EDD completely  (edd=off)
+# edd=sk  skips the MBR test    (edd=skipmbr)
+	pushl	%esi
+    	cmpl	$0, %cs:cmd_line_ptr
+	jz	done_cl
+	movl	%cs:(cmd_line_ptr), %esi
+# ds:esi has the pointer to the command line now
+	movl	$(COMMAND_LINE_SIZE-7), %ecx
+# loop through kernel command line one byte at a time
+cl_loop:
+	cmpl	$EDD_CL_EQUALS, (%si)
+	jz	found_edd_equals
+	incl	%esi
+	loop	cl_loop
+	jmp	done_cl
+found_edd_equals:
+# only looking at first two characters after equals
+    	addl	$4, %esi
+	cmpw	$EDD_CL_OFF, (%si)	# edd=of
+	jz	do_edd_off
+	cmpw	$EDD_CL_SKIP, (%si)	# edd=sk
+	jz	do_edd_skipmbr
+	jmp	done_cl
+do_edd_skipmbr:
+    	popl	%esi
+	jmp	edd_start
+do_edd_off:
+	popl	%esi
+	jmp	edd_done
+done_cl:
+	popl	%esi
+
+
+# Read the first sector of each BIOS disk device and store the 4-byte signature
+edd_mbr_sig_start:
+	movb	$0x80, %dl			# from device 80
+	movw	$EDD_MBR_SIG_BUF, %bx		# store buffer ptr in bx
+edd_mbr_sig_read:
+	movl	$0xFFFFFFFF, %eax
+	movl	%eax, (%bx)			# assume failure
+	pushw	%bx
+	movb	$READ_SECTORS, %ah
+	movb	$1, %al				# read 1 sector
+	movb	$0, %dh				# at head 0
+	movw	$1, %cx				# cylinder 0, sector 0
+	pushw	%es
+	pushw	%ds
+	popw	%es
+    	movw	$EDDBUF, %bx			# disk's data goes into EDDBUF
+	pushw	%dx             # work around buggy BIOSes
+	stc                     # work around buggy BIOSes
+	int	$0x13
+	sti                     # work around buggy BIOSes
+	popw	%dx
+	popw	%es
+	popw	%bx
+	jc	edd_mbr_sig_done		# on failure, we're done.
+	movl	(EDDBUF+EDD_MBR_SIG_OFFSET), %eax # read sig out of the MBR
+	movl	%eax, (%bx)			# store success
+	incb	(EDD_MBR_SIG_NR_BUF)		# note that we stored something
+	incb	%dl				# increment to next device
+	addw	$4, %bx				# increment sig buffer ptr
+	cmpb	$EDD_MBR_SIG_MAX, (EDD_MBR_SIG_NR_BUF)	# Out of space?
+	jb	edd_mbr_sig_read		# keep looping
+edd_mbr_sig_done:
+
+# Do the BIOS Enhanced Disk Drive calls
+# This consists of two calls:
+#    int 13h ah=41h "Check Extensions Present"
+#    int 13h ah=48h "Get Device Parameters"
+#    int 13h ah=08h "Legacy Get Device Parameters"
+#
+# A buffer of size EDDMAXNR*(EDDEXTSIZE+EDDPARMSIZE) is reserved for our use
+# in the boot_params at EDDBUF.  The first four bytes of which are
+# used to store the device number, interface support map and version
+# results from fn41.  The next four bytes are used to store the legacy
+# cylinders, heads, and sectors from fn08. The following 74 bytes are used to
+# store the results from fn48.  Starting from device 80h, fn41, then fn48
+# are called and their results stored in EDDBUF+n*(EDDEXTSIZE+EDDPARMIZE).
+# Then the pointer is incremented to store the data for the next call.
+# This repeats until either a device doesn't exist, or until EDDMAXNR
+# devices have been stored.
+# The one tricky part is that ds:si always points EDDEXTSIZE bytes into
+# the structure, and the fn41 and fn08 results are stored at offsets
+# from there.  This removes the need to increment the pointer for
+# every store, and leaves it ready for the fn48 call.
+# A second one-byte buffer, EDDNR, in the boot_params stores
+# the number of BIOS devices which exist, up to EDDMAXNR.
+# In setup.c, copy_edd() stores both boot_params buffers away
+# for later use, as they would get overwritten otherwise.
+# This code is sensitive to the size of the structs in edd.h
+edd_start:
+						# %ds points to the bootsector
+       						# result buffer for fn48
+	movw	$EDDBUF+EDDEXTSIZE, %si		# in ds:si, fn41 results
+						# kept just before that
+	movb	$0x80, %dl			# BIOS device 0x80
+
+edd_check_ext:
+	movb	$CHECKEXTENSIONSPRESENT, %ah    # Function 41
+	movw	$EDDMAGIC1, %bx			# magic
+	int	$0x13				# make the call
+	jc	edd_done			# no more BIOS devices
+
+	cmpw	$EDDMAGIC2, %bx			# is magic right?
+	jne	edd_next			# nope, next...
+
+	movb	%dl, %ds:-8(%si)		# store device number
+	movb	%ah, %ds:-7(%si)		# store version
+	movw	%cx, %ds:-6(%si)		# store extensions
+	incb	(EDDNR)				# note that we stored something
+
+edd_get_device_params:
+	movw	$EDDPARMSIZE, %ds:(%si)		# put size
+	movw	$0x0, %ds:2(%si)		# work around buggy BIOSes
+	movb	$GETDEVICEPARAMETERS, %ah	# Function 48
+	int	$0x13				# make the call
+						# Don't check for fail return
+						# it doesn't matter.
+edd_get_legacy_chs:
+	xorw    %ax, %ax
+	movw    %ax, %ds:-4(%si)
+	movw    %ax, %ds:-2(%si)
+        # Ralf Brown's Interrupt List says to set ES:DI to
+	# 0000h:0000h "to guard against BIOS bugs"
+	pushw   %es
+	movw    %ax, %es
+	movw    %ax, %di
+	pushw   %dx                             # legacy call clobbers %dl
+	movb    $LEGACYGETDEVICEPARAMETERS, %ah # Function 08
+	int     $0x13                           # make the call
+	jc      edd_legacy_done                 # failed
+	movb    %cl, %al                        # Low 6 bits are max
+	andb    $0x3F, %al                      #   sector number
+	movb	%al, %ds:-1(%si)                # Record max sect
+	movb    %dh, %ds:-2(%si)                # Record max head number
+	movb    %ch, %al                        # Low 8 bits of max cyl
+	shr     $6, %cl
+	movb    %cl, %ah                        # High 2 bits of max cyl
+	movw    %ax, %ds:-4(%si)
+
+edd_legacy_done:
+	popw    %dx
+	popw    %es
+	movw	%si, %ax			# increment si
+	addw	$EDDPARMSIZE+EDDEXTSIZE, %ax
+	movw	%ax, %si
+
+edd_next:
+	incb	%dl				# increment to next device
+	cmpb	$EDDMAXNR, (EDDNR) 		# Out of space?
+	jb	edd_check_ext			# keep looping
+
+edd_done:
+#endif
diff --git a/arch/i386/boot/install.sh b/arch/i386/boot/install.sh
new file mode 100644
index 0000000..90f2452
--- /dev/null
+++ b/arch/i386/boot/install.sh
@@ -0,0 +1,40 @@
+#!/bin/sh
+#
+# arch/i386/boot/install.sh
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 1995 by Linus Torvalds
+#
+# Adapted from code in arch/i386/boot/Makefile by H. Peter Anvin
+#
+# "make install" script for i386 architecture
+#
+# Arguments:
+#   $1 - kernel version
+#   $2 - kernel image file
+#   $3 - kernel map file
+#   $4 - default install path (blank if root directory)
+#
+
+# User may have a custom install script
+
+if [ -x ~/bin/installkernel ]; then exec ~/bin/installkernel "$@"; fi
+if [ -x /sbin/installkernel ]; then exec /sbin/installkernel "$@"; fi
+
+# Default install - same as make zlilo
+
+if [ -f $4/vmlinuz ]; then
+	mv $4/vmlinuz $4/vmlinuz.old
+fi
+
+if [ -f $4/System.map ]; then
+	mv $4/System.map $4/System.old
+fi
+
+cat $2 > $4/vmlinuz
+cp $3 $4/System.map
+
+if [ -x /sbin/lilo ]; then /sbin/lilo; else /etc/lilo/install; fi
diff --git a/arch/i386/boot/mtools.conf.in b/arch/i386/boot/mtools.conf.in
new file mode 100644
index 0000000..efd6d24
--- /dev/null
+++ b/arch/i386/boot/mtools.conf.in
@@ -0,0 +1,17 @@
+#
+# mtools configuration file for "make (b)zdisk"
+#
+
+# Actual floppy drive
+drive a:
+  file="/dev/fd0"
+
+# 1.44 MB floppy disk image
+drive v:
+  file="@OBJ@/fdimage" cylinders=80 heads=2 sectors=18 filter
+
+# 2.88 MB floppy disk image (mostly for virtual uses)
+drive w:
+  file="@OBJ@/fdimage" cylinders=80 heads=2 sectors=36 filter
+
+
diff --git a/arch/i386/boot/setup.S b/arch/i386/boot/setup.S
new file mode 100644
index 0000000..a934ab3
--- /dev/null
+++ b/arch/i386/boot/setup.S
@@ -0,0 +1,1028 @@
+/*
+ *	setup.S		Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * setup.s is responsible for getting the system data from the BIOS,
+ * and putting them into the appropriate places in system memory.
+ * both setup.s and system has been loaded by the bootblock.
+ *
+ * This code asks the bios for memory/disk/other parameters, and
+ * puts them in a "safe" place: 0x90000-0x901FF, ie where the
+ * boot-block used to be. It is then up to the protected mode
+ * system to read them from there before the area is overwritten
+ * for buffer-blocks.
+ *
+ * Move PS/2 aux init code to psaux.c
+ * (troyer@saifr00.cfsat.Honeywell.COM) 03Oct92
+ *
+ * some changes and additional features by Christoph Niemann,
+ * March 1993/June 1994 (Christoph.Niemann@linux.org)
+ *
+ * add APM BIOS checking by Stephen Rothwell, May 1994
+ * (sfr@canb.auug.org.au)
+ *
+ * High load stuff, initrd support and position independency
+ * by Hans Lermen & Werner Almesberger, February 1996
+ * <lermen@elserv.ffm.fgan.de>, <almesber@lrc.epfl.ch>
+ *
+ * Video handling moved to video.S by Martin Mares, March 1996
+ * <mj@k332.feld.cvut.cz>
+ *
+ * Extended memory detection scheme retwiddled by orc@pell.chi.il.us (david
+ * parsons) to avoid loadlin confusion, July 1997
+ *
+ * Transcribed from Intel (as86) -> AT&T (gas) by Chris Noe, May 1999.
+ * <stiker@northlink.com>
+ *
+ * Fix to work around buggy BIOSes which dont use carry bit correctly
+ * and/or report extended memory in CX/DX for e801h memory size detection 
+ * call.  As a result the kernel got wrong figures.  The int15/e801h docs
+ * from Ralf Brown interrupt list seem to indicate AX/BX should be used
+ * anyway.  So to avoid breaking many machines (presumably there was a reason
+ * to orginally use CX/DX instead of AX/BX), we do a kludge to see
+ * if CX/DX have been changed in the e801 call and if so use AX/BX .
+ * Michael Miller, April 2001 <michaelm@mjmm.org>
+ *
+ * New A20 code ported from SYSLINUX by H. Peter Anvin. AMD Elan bugfixes
+ * by Robert Schwebel, December 2001 <robert@schwebel.de>
+ */
+
+#include <linux/config.h>
+#include <asm/segment.h>
+#include <linux/version.h>
+#include <linux/compile.h>
+#include <asm/boot.h>
+#include <asm/e820.h>
+#include <asm/page.h>
+	
+/* Signature words to ensure LILO loaded us right */
+#define SIG1	0xAA55
+#define SIG2	0x5A5A
+
+INITSEG  = DEF_INITSEG		# 0x9000, we move boot here, out of the way
+SYSSEG   = DEF_SYSSEG		# 0x1000, system loaded at 0x10000 (65536).
+SETUPSEG = DEF_SETUPSEG		# 0x9020, this is the current segment
+				# ... and the former contents of CS
+
+DELTA_INITSEG = SETUPSEG - INITSEG	# 0x0020
+
+.code16
+.globl begtext, begdata, begbss, endtext, enddata, endbss
+
+.text
+begtext:
+.data
+begdata:
+.bss
+begbss:
+.text
+
+start:
+	jmp	trampoline
+
+# This is the setup header, and it must start at %cs:2 (old 0x9020:2)
+
+		.ascii	"HdrS"		# header signature
+		.word	0x0203		# header version number (>= 0x0105)
+					# or else old loadlin-1.5 will fail)
+realmode_swtch:	.word	0, 0		# default_switch, SETUPSEG
+start_sys_seg:	.word	SYSSEG
+		.word	kernel_version	# pointing to kernel version string
+					# above section of header is compatible
+					# with loadlin-1.5 (header v1.5). Don't
+					# change it.
+
+type_of_loader:	.byte	0		# = 0, old one (LILO, Loadlin,
+					#      Bootlin, SYSLX, bootsect...)
+					# See Documentation/i386/boot.txt for
+					# assigned ids
+	
+# flags, unused bits must be zero (RFU) bit within loadflags
+loadflags:
+LOADED_HIGH	= 1			# If set, the kernel is loaded high
+CAN_USE_HEAP	= 0x80			# If set, the loader also has set
+					# heap_end_ptr to tell how much
+					# space behind setup.S can be used for
+					# heap purposes.
+					# Only the loader knows what is free
+#ifndef __BIG_KERNEL__
+		.byte	0
+#else
+		.byte	LOADED_HIGH
+#endif
+
+setup_move_size: .word  0x8000		# size to move, when setup is not
+					# loaded at 0x90000. We will move setup 
+					# to 0x90000 then just before jumping
+					# into the kernel. However, only the
+					# loader knows how much data behind
+					# us also needs to be loaded.
+
+code32_start:				# here loaders can put a different
+					# start address for 32-bit code.
+#ifndef __BIG_KERNEL__
+		.long	0x1000		#   0x1000 = default for zImage
+#else
+		.long	0x100000	# 0x100000 = default for big kernel
+#endif
+
+ramdisk_image:	.long	0		# address of loaded ramdisk image
+					# Here the loader puts the 32-bit
+					# address where it loaded the image.
+					# This only will be read by the kernel.
+
+ramdisk_size:	.long	0		# its size in bytes
+
+bootsect_kludge:
+		.long	0		# obsolete
+
+heap_end_ptr:	.word	modelist+1024	# (Header version 0x0201 or later)
+					# space from here (exclusive) down to
+					# end of setup code can be used by setup
+					# for local heap purposes.
+
+pad1:		.word	0
+cmd_line_ptr:	.long 0			# (Header version 0x0202 or later)
+					# If nonzero, a 32-bit pointer
+					# to the kernel command line.
+					# The command line should be
+					# located between the start of
+					# setup and the end of low
+					# memory (0xa0000), or it may
+					# get overwritten before it
+					# gets read.  If this field is
+					# used, there is no longer
+					# anything magical about the
+					# 0x90000 segment; the setup
+					# can be located anywhere in
+					# low memory 0x10000 or higher.
+
+ramdisk_max:	.long (-__PAGE_OFFSET-(512 << 20)-1) & 0x7fffffff
+					# (Header version 0x0203 or later)
+					# The highest safe address for
+					# the contents of an initrd
+
+trampoline:	call	start_of_setup
+		.align 16
+					# The offset at this point is 0x240
+		.space	(0x7ff-0x240+1) # E820 & EDD space (ending at 0x7ff)
+# End of setup header #####################################################
+
+start_of_setup:
+# Bootlin depends on this being done early
+	movw	$0x01500, %ax
+	movb	$0x81, %dl
+	int	$0x13
+
+#ifdef SAFE_RESET_DISK_CONTROLLER
+# Reset the disk controller.
+	movw	$0x0000, %ax
+	movb	$0x80, %dl
+	int	$0x13
+#endif
+
+# Set %ds = %cs, we know that SETUPSEG = %cs at this point
+	movw	%cs, %ax		# aka SETUPSEG
+	movw	%ax, %ds
+# Check signature at end of setup
+	cmpw	$SIG1, setup_sig1
+	jne	bad_sig
+
+	cmpw	$SIG2, setup_sig2
+	jne	bad_sig
+
+	jmp	good_sig1
+
+# Routine to print asciiz string at ds:si
+prtstr:
+	lodsb
+	andb	%al, %al
+	jz	fin
+
+	call	prtchr
+	jmp	prtstr
+
+fin:	ret
+
+# Space printing
+prtsp2:	call	prtspc		# Print double space
+prtspc:	movb	$0x20, %al	# Print single space (note: fall-thru)
+
+# Part of above routine, this one just prints ascii al
+prtchr:	pushw	%ax
+	pushw	%cx
+	movw	$7,%bx
+	movw	$0x01, %cx
+	movb	$0x0e, %ah
+	int	$0x10
+	popw	%cx
+	popw	%ax
+	ret
+
+beep:	movb	$0x07, %al
+	jmp	prtchr
+	
+no_sig_mess: .string	"No setup signature found ..."
+
+good_sig1:
+	jmp	good_sig
+
+# We now have to find the rest of the setup code/data
+bad_sig:
+	movw	%cs, %ax			# SETUPSEG
+	subw	$DELTA_INITSEG, %ax		# INITSEG
+	movw	%ax, %ds
+	xorb	%bh, %bh
+	movb	(497), %bl			# get setup sect from bootsect
+	subw	$4, %bx				# LILO loads 4 sectors of setup
+	shlw	$8, %bx				# convert to words (1sect=2^8 words)
+	movw	%bx, %cx
+	shrw	$3, %bx				# convert to segment
+	addw	$SYSSEG, %bx
+	movw	%bx, %cs:start_sys_seg
+# Move rest of setup code/data to here
+	movw	$2048, %di			# four sectors loaded by LILO
+	subw	%si, %si
+	pushw	%cs
+	popw	%es
+	movw	$SYSSEG, %ax
+	movw	%ax, %ds
+	rep
+	movsw
+	movw	%cs, %ax			# aka SETUPSEG
+	movw	%ax, %ds
+	cmpw	$SIG1, setup_sig1
+	jne	no_sig
+
+	cmpw	$SIG2, setup_sig2
+	jne	no_sig
+
+	jmp	good_sig
+
+no_sig:
+	lea	no_sig_mess, %si
+	call	prtstr
+
+no_sig_loop:
+	hlt
+	jmp	no_sig_loop
+
+good_sig:
+	movw	%cs, %ax			# aka SETUPSEG
+	subw	$DELTA_INITSEG, %ax 		# aka INITSEG
+	movw	%ax, %ds
+# Check if an old loader tries to load a big-kernel
+	testb	$LOADED_HIGH, %cs:loadflags	# Do we have a big kernel?
+	jz	loader_ok			# No, no danger for old loaders.
+
+	cmpb	$0, %cs:type_of_loader 		# Do we have a loader that
+						# can deal with us?
+	jnz	loader_ok			# Yes, continue.
+
+	pushw	%cs				# No, we have an old loader,
+	popw	%ds				# die. 
+	lea	loader_panic_mess, %si
+	call	prtstr
+
+	jmp	no_sig_loop
+
+loader_panic_mess: .string "Wrong loader, giving up..."
+
+loader_ok:
+# Get memory size (extended mem, kB)
+
+	xorl	%eax, %eax
+	movl	%eax, (0x1e0)
+#ifndef STANDARD_MEMORY_BIOS_CALL
+	movb	%al, (E820NR)
+# Try three different memory detection schemes.  First, try
+# e820h, which lets us assemble a memory map, then try e801h,
+# which returns a 32-bit memory size, and finally 88h, which
+# returns 0-64m
+
+# method E820H:
+# the memory map from hell.  e820h returns memory classified into
+# a whole bunch of different types, and allows memory holes and
+# everything.  We scan through this memory map and build a list
+# of the first 32 memory areas, which we return at [E820MAP].
+# This is documented at http://www.acpi.info/, in the ACPI 2.0 specification.
+
+#define SMAP  0x534d4150
+
+meme820:
+	xorl	%ebx, %ebx			# continuation counter
+	movw	$E820MAP, %di			# point into the whitelist
+						# so we can have the bios
+						# directly write into it.
+
+jmpe820:
+	movl	$0x0000e820, %eax		# e820, upper word zeroed
+	movl	$SMAP, %edx			# ascii 'SMAP'
+	movl	$20, %ecx			# size of the e820rec
+	pushw	%ds				# data record.
+	popw	%es
+	int	$0x15				# make the call
+	jc	bail820				# fall to e801 if it fails
+
+	cmpl	$SMAP, %eax			# check the return is `SMAP'
+	jne	bail820				# fall to e801 if it fails
+
+#	cmpl	$1, 16(%di)			# is this usable memory?
+#	jne	again820
+
+	# If this is usable memory, we save it by simply advancing %di by
+	# sizeof(e820rec).
+	#
+good820:
+	movb	(E820NR), %al			# up to 32 entries
+	cmpb	$E820MAX, %al
+	jnl	bail820
+
+	incb	(E820NR)
+	movw	%di, %ax
+	addw	$20, %ax
+	movw	%ax, %di
+again820:
+	cmpl	$0, %ebx			# check to see if
+	jne	jmpe820				# %ebx is set to EOF
+bail820:
+
+
+# method E801H:
+# memory size is in 1k chunksizes, to avoid confusing loadlin.
+# we store the 0xe801 memory size in a completely different place,
+# because it will most likely be longer than 16 bits.
+# (use 1e0 because that's what Larry Augustine uses in his
+# alternative new memory detection scheme, and it's sensible
+# to write everything into the same place.)
+
+meme801:
+	stc					# fix to work around buggy
+	xorw	%cx,%cx				# BIOSes which dont clear/set
+	xorw	%dx,%dx				# carry on pass/error of
+						# e801h memory size call
+						# or merely pass cx,dx though
+						# without changing them.
+	movw	$0xe801, %ax
+	int	$0x15
+	jc	mem88
+
+	cmpw	$0x0, %cx			# Kludge to handle BIOSes
+	jne	e801usecxdx			# which report their extended
+	cmpw	$0x0, %dx			# memory in AX/BX rather than
+	jne	e801usecxdx			# CX/DX.  The spec I have read
+	movw	%ax, %cx			# seems to indicate AX/BX 
+	movw	%bx, %dx			# are more reasonable anyway...
+
+e801usecxdx:
+	andl	$0xffff, %edx			# clear sign extend
+	shll	$6, %edx			# and go from 64k to 1k chunks
+	movl	%edx, (0x1e0)			# store extended memory size
+	andl	$0xffff, %ecx			# clear sign extend
+ 	addl	%ecx, (0x1e0)			# and add lower memory into
+						# total size.
+
+# Ye Olde Traditional Methode.  Returns the memory size (up to 16mb or
+# 64mb, depending on the bios) in ax.
+mem88:
+
+#endif
+	movb	$0x88, %ah
+	int	$0x15
+	movw	%ax, (2)
+
+# Set the keyboard repeat rate to the max
+	movw	$0x0305, %ax
+	xorw	%bx, %bx
+	int	$0x16
+
+# Check for video adapter and its parameters and allow the
+# user to browse video modes.
+	call	video				# NOTE: we need %ds pointing
+						# to bootsector
+
+# Get hd0 data...
+	xorw	%ax, %ax
+	movw	%ax, %ds
+	ldsw	(4 * 0x41), %si
+	movw	%cs, %ax			# aka SETUPSEG
+	subw	$DELTA_INITSEG, %ax		# aka INITSEG
+	pushw	%ax
+	movw	%ax, %es
+	movw	$0x0080, %di
+	movw	$0x10, %cx
+	pushw	%cx
+	cld
+	rep
+ 	movsb
+# Get hd1 data...
+	xorw	%ax, %ax
+	movw	%ax, %ds
+	ldsw	(4 * 0x46), %si
+	popw	%cx
+	popw	%es
+	movw	$0x0090, %di
+	rep
+	movsb
+# Check that there IS a hd1 :-)
+	movw	$0x01500, %ax
+	movb	$0x81, %dl
+	int	$0x13
+	jc	no_disk1
+	
+	cmpb	$3, %ah
+	je	is_disk1
+
+no_disk1:
+	movw	%cs, %ax			# aka SETUPSEG
+	subw	$DELTA_INITSEG, %ax 		# aka INITSEG
+	movw	%ax, %es
+	movw	$0x0090, %di
+	movw	$0x10, %cx
+	xorw	%ax, %ax
+	cld
+	rep
+	stosb
+is_disk1:
+# check for Micro Channel (MCA) bus
+	movw	%cs, %ax			# aka SETUPSEG
+	subw	$DELTA_INITSEG, %ax		# aka INITSEG
+	movw	%ax, %ds
+	xorw	%ax, %ax
+	movw	%ax, (0xa0)			# set table length to 0
+	movb	$0xc0, %ah
+	stc
+	int	$0x15				# moves feature table to es:bx
+	jc	no_mca
+
+	pushw	%ds
+	movw	%es, %ax
+	movw	%ax, %ds
+	movw	%cs, %ax			# aka SETUPSEG
+	subw	$DELTA_INITSEG, %ax		# aka INITSEG
+	movw	%ax, %es
+	movw	%bx, %si
+	movw	$0xa0, %di
+	movw	(%si), %cx
+	addw	$2, %cx				# table length is a short
+	cmpw	$0x10, %cx
+	jc	sysdesc_ok
+
+	movw	$0x10, %cx			# we keep only first 16 bytes
+sysdesc_ok:
+	rep
+	movsb
+	popw	%ds
+no_mca:
+#ifdef CONFIG_X86_VOYAGER
+	movb	$0xff, 0x40	# flag on config found
+	movb	$0xc0, %al
+	mov	$0xff, %ah
+	int	$0x15		# put voyager config info at es:di
+	jc	no_voyager
+	movw	$0x40, %si	# place voyager info in apm table
+	cld
+	movw	$7, %cx
+voyager_rep:
+	movb	%es:(%di), %al
+	movb	%al,(%si)
+	incw	%di
+	incw	%si
+	decw	%cx
+	jnz	voyager_rep
+no_voyager:	
+#endif
+# Check for PS/2 pointing device
+	movw	%cs, %ax			# aka SETUPSEG
+	subw	$DELTA_INITSEG, %ax		# aka INITSEG
+	movw	%ax, %ds
+	movw	$0, (0x1ff)			# default is no pointing device
+	int	$0x11				# int 0x11: equipment list
+	testb	$0x04, %al			# check if mouse installed
+	jz	no_psmouse
+
+	movw	$0xAA, (0x1ff)			# device present
+no_psmouse:
+
+#if defined(CONFIG_X86_SPEEDSTEP_SMI) || defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
+	movl	$0x0000E980, %eax		# IST Support 
+	movl	$0x47534943, %edx		# Request value
+	int	$0x15
+
+	movl	%eax, (96)
+	movl	%ebx, (100)
+	movl	%ecx, (104)
+	movl	%edx, (108)
+#endif
+
+#if defined(CONFIG_APM) || defined(CONFIG_APM_MODULE)
+# Then check for an APM BIOS...
+						# %ds points to the bootsector
+	movw	$0, 0x40			# version = 0 means no APM BIOS
+	movw	$0x05300, %ax			# APM BIOS installation check
+	xorw	%bx, %bx
+	int	$0x15
+	jc	done_apm_bios			# Nope, no APM BIOS
+	
+	cmpw	$0x0504d, %bx			# Check for "PM" signature
+	jne	done_apm_bios			# No signature, no APM BIOS
+
+	andw	$0x02, %cx			# Is 32 bit supported?
+	je	done_apm_bios			# No 32-bit, no (good) APM BIOS
+
+	movw	$0x05304, %ax			# Disconnect first just in case
+	xorw	%bx, %bx
+	int	$0x15				# ignore return code
+	movw	$0x05303, %ax			# 32 bit connect
+	xorl	%ebx, %ebx
+	xorw	%cx, %cx			# paranoia :-)
+	xorw	%dx, %dx			#   ...
+	xorl	%esi, %esi			#   ...
+	xorw	%di, %di			#   ...
+	int	$0x15
+	jc	no_32_apm_bios			# Ack, error. 
+
+	movw	%ax,  (66)			# BIOS code segment
+	movl	%ebx, (68)			# BIOS entry point offset
+	movw	%cx,  (72)			# BIOS 16 bit code segment
+	movw	%dx,  (74)			# BIOS data segment
+	movl	%esi, (78)			# BIOS code segment lengths
+	movw	%di,  (82)			# BIOS data segment length
+# Redo the installation check as the 32 bit connect
+# modifies the flags returned on some BIOSs
+	movw	$0x05300, %ax			# APM BIOS installation check
+	xorw	%bx, %bx
+	xorw	%cx, %cx			# paranoia
+	int	$0x15
+	jc	apm_disconnect			# error -> shouldn't happen
+
+	cmpw	$0x0504d, %bx			# check for "PM" signature
+	jne	apm_disconnect			# no sig -> shouldn't happen
+
+	movw	%ax, (64)			# record the APM BIOS version
+	movw	%cx, (76)			# and flags
+	jmp	done_apm_bios
+
+apm_disconnect:					# Tidy up
+	movw	$0x05304, %ax			# Disconnect
+	xorw	%bx, %bx
+	int	$0x15				# ignore return code
+
+	jmp	done_apm_bios
+
+no_32_apm_bios:
+	andw	$0xfffd, (76)			# remove 32 bit support bit
+done_apm_bios:
+#endif
+
+#include "edd.S"
+
+# Now we want to move to protected mode ...
+	cmpw	$0, %cs:realmode_swtch
+	jz	rmodeswtch_normal
+
+	lcall	*%cs:realmode_swtch
+
+	jmp	rmodeswtch_end
+
+rmodeswtch_normal:
+        pushw	%cs
+	call	default_switch
+
+rmodeswtch_end:
+# we get the code32 start address and modify the below 'jmpi'
+# (loader may have changed it)
+	movl	%cs:code32_start, %eax
+	movl	%eax, %cs:code32
+
+# Now we move the system to its rightful place ... but we check if we have a
+# big-kernel. In that case we *must* not move it ...
+	testb	$LOADED_HIGH, %cs:loadflags
+	jz	do_move0			# .. then we have a normal low
+						# loaded zImage
+						# .. or else we have a high
+						# loaded bzImage
+	jmp	end_move			# ... and we skip moving
+
+do_move0:
+	movw	$0x100, %ax			# start of destination segment
+	movw	%cs, %bp			# aka SETUPSEG
+	subw	$DELTA_INITSEG, %bp		# aka INITSEG
+	movw	%cs:start_sys_seg, %bx		# start of source segment
+	cld
+do_move:
+	movw	%ax, %es			# destination segment
+	incb	%ah				# instead of add ax,#0x100
+	movw	%bx, %ds			# source segment
+	addw	$0x100, %bx
+	subw	%di, %di
+	subw	%si, %si
+	movw 	$0x800, %cx
+	rep
+	movsw
+	cmpw	%bp, %bx			# assume start_sys_seg > 0x200,
+						# so we will perhaps read one
+						# page more than needed, but
+						# never overwrite INITSEG
+						# because destination is a
+						# minimum one page below source
+	jb	do_move
+
+end_move:
+# then we load the segment descriptors
+	movw	%cs, %ax			# aka SETUPSEG
+	movw	%ax, %ds
+		
+# Check whether we need to be downward compatible with version <=201
+	cmpl	$0, cmd_line_ptr
+	jne	end_move_self		# loader uses version >=202 features
+	cmpb	$0x20, type_of_loader
+	je	end_move_self		# bootsect loader, we know of it
+
+# Boot loader doesnt support boot protocol version 2.02.
+# If we have our code not at 0x90000, we need to move it there now.
+# We also then need to move the params behind it (commandline)
+# Because we would overwrite the code on the current IP, we move
+# it in two steps, jumping high after the first one.
+	movw	%cs, %ax
+	cmpw	$SETUPSEG, %ax
+	je	end_move_self
+
+	cli					# make sure we really have
+						# interrupts disabled !
+						# because after this the stack
+						# should not be used
+	subw	$DELTA_INITSEG, %ax		# aka INITSEG
+	movw	%ss, %dx
+	cmpw	%ax, %dx
+	jb	move_self_1
+
+	addw	$INITSEG, %dx
+	subw	%ax, %dx			# this will go into %ss after
+						# the move
+move_self_1:
+	movw	%ax, %ds
+	movw	$INITSEG, %ax			# real INITSEG
+	movw	%ax, %es
+	movw	%cs:setup_move_size, %cx
+	std					# we have to move up, so we use
+						# direction down because the
+						# areas may overlap
+	movw	%cx, %di
+	decw	%di
+	movw	%di, %si
+	subw	$move_self_here+0x200, %cx
+	rep
+	movsb
+	ljmp	$SETUPSEG, $move_self_here
+
+move_self_here:
+	movw	$move_self_here+0x200, %cx
+	rep
+	movsb
+	movw	$SETUPSEG, %ax
+	movw	%ax, %ds
+	movw	%dx, %ss
+end_move_self:					# now we are at the right place
+
+#
+# Enable A20.  This is at the very best an annoying procedure.
+# A20 code ported from SYSLINUX 1.52-1.63 by H. Peter Anvin.
+# AMD Elan bug fix by Robert Schwebel.
+#
+
+#if defined(CONFIG_X86_ELAN)
+	movb $0x02, %al			# alternate A20 gate
+	outb %al, $0x92			# this works on SC410/SC520
+a20_elan_wait:
+	call a20_test
+	jz a20_elan_wait
+	jmp a20_done
+#endif
+
+
+A20_TEST_LOOPS		=  32		# Iterations per wait
+A20_ENABLE_LOOPS	= 255		# Total loops to try		
+
+
+#ifndef CONFIG_X86_VOYAGER
+a20_try_loop:
+
+	# First, see if we are on a system with no A20 gate.
+a20_none:
+	call	a20_test
+	jnz	a20_done
+
+	# Next, try the BIOS (INT 0x15, AX=0x2401)
+a20_bios:
+	movw	$0x2401, %ax
+	pushfl					# Be paranoid about flags
+	int	$0x15
+	popfl
+
+	call	a20_test
+	jnz	a20_done
+
+	# Try enabling A20 through the keyboard controller
+#endif /* CONFIG_X86_VOYAGER */
+a20_kbc:
+	call	empty_8042
+
+#ifndef CONFIG_X86_VOYAGER
+	call	a20_test			# Just in case the BIOS worked
+	jnz	a20_done			# but had a delayed reaction.
+#endif
+
+	movb	$0xD1, %al			# command write
+	outb	%al, $0x64
+	call	empty_8042
+
+	movb	$0xDF, %al			# A20 on
+	outb	%al, $0x60
+	call	empty_8042
+
+#ifndef CONFIG_X86_VOYAGER
+	# Wait until a20 really *is* enabled; it can take a fair amount of
+	# time on certain systems; Toshiba Tecras are known to have this
+	# problem.
+a20_kbc_wait:
+	xorw	%cx, %cx
+a20_kbc_wait_loop:
+	call	a20_test
+	jnz	a20_done
+	loop	a20_kbc_wait_loop
+
+	# Final attempt: use "configuration port A"
+a20_fast:
+	inb	$0x92, %al			# Configuration Port A
+	orb	$0x02, %al			# "fast A20" version
+	andb	$0xFE, %al			# don't accidentally reset
+	outb	%al, $0x92
+
+	# Wait for configuration port A to take effect
+a20_fast_wait:
+	xorw	%cx, %cx
+a20_fast_wait_loop:
+	call	a20_test
+	jnz	a20_done
+	loop	a20_fast_wait_loop
+
+	# A20 is still not responding.  Try frobbing it again.
+	# 
+	decb	(a20_tries)
+	jnz	a20_try_loop
+	
+	movw	$a20_err_msg, %si
+	call	prtstr
+
+a20_die:
+	hlt
+	jmp	a20_die
+
+a20_tries:
+	.byte	A20_ENABLE_LOOPS
+
+a20_err_msg:
+	.ascii	"linux: fatal error: A20 gate not responding!"
+	.byte	13, 10, 0
+
+	# If we get here, all is good
+a20_done:
+
+#endif /* CONFIG_X86_VOYAGER */
+# set up gdt and idt
+	lidt	idt_48				# load idt with 0,0
+	xorl	%eax, %eax			# Compute gdt_base
+	movw	%ds, %ax			# (Convert %ds:gdt to a linear ptr)
+	shll	$4, %eax
+	addl	$gdt, %eax
+	movl	%eax, (gdt_48+2)
+	lgdt	gdt_48				# load gdt with whatever is
+						# appropriate
+
+# make sure any possible coprocessor is properly reset..
+	xorw	%ax, %ax
+	outb	%al, $0xf0
+	call	delay
+
+	outb	%al, $0xf1
+	call	delay
+
+# well, that went ok, I hope. Now we mask all interrupts - the rest
+# is done in init_IRQ().
+	movb	$0xFF, %al			# mask all interrupts for now
+	outb	%al, $0xA1
+	call	delay
+	
+	movb	$0xFB, %al			# mask all irq's but irq2 which
+	outb	%al, $0x21			# is cascaded
+
+# Well, that certainly wasn't fun :-(. Hopefully it works, and we don't
+# need no steenking BIOS anyway (except for the initial loading :-).
+# The BIOS-routine wants lots of unnecessary data, and it's less
+# "interesting" anyway. This is how REAL programmers do it.
+#
+# Well, now's the time to actually move into protected mode. To make
+# things as simple as possible, we do no register set-up or anything,
+# we let the gnu-compiled 32-bit programs do that. We just jump to
+# absolute address 0x1000 (or the loader supplied one),
+# in 32-bit protected mode.
+#
+# Note that the short jump isn't strictly needed, although there are
+# reasons why it might be a good idea. It won't hurt in any case.
+	movw	$1, %ax				# protected mode (PE) bit
+	lmsw	%ax				# This is it!
+	jmp	flush_instr
+
+flush_instr:
+	xorw	%bx, %bx			# Flag to indicate a boot
+	xorl	%esi, %esi			# Pointer to real-mode code
+	movw	%cs, %si
+	subw	$DELTA_INITSEG, %si
+	shll	$4, %esi			# Convert to 32-bit pointer
+
+# jump to startup_32 in arch/i386/boot/compressed/head.S
+#	
+# NOTE: For high loaded big kernels we need a
+#	jmpi    0x100000,__BOOT_CS
+#
+#	but we yet haven't reloaded the CS register, so the default size 
+#	of the target offset still is 16 bit.
+#       However, using an operand prefix (0x66), the CPU will properly
+#	take our 48 bit far pointer. (INTeL 80386 Programmer's Reference
+#	Manual, Mixing 16-bit and 32-bit code, page 16-6)
+
+	.byte 0x66, 0xea			# prefix + jmpi-opcode
+code32:	.long	0x1000				# will be set to 0x100000
+						# for big kernels
+	.word	__BOOT_CS
+
+# Here's a bunch of information about your current kernel..
+kernel_version:	.ascii	UTS_RELEASE
+		.ascii	" ("
+		.ascii	LINUX_COMPILE_BY
+		.ascii	"@"
+		.ascii	LINUX_COMPILE_HOST
+		.ascii	") "
+		.ascii	UTS_VERSION
+		.byte	0
+
+# This is the default real mode switch routine.
+# to be called just before protected mode transition
+default_switch:
+	cli					# no interrupts allowed !
+	movb	$0x80, %al			# disable NMI for bootup
+						# sequence
+	outb	%al, $0x70
+	lret
+
+
+#ifndef CONFIG_X86_VOYAGER
+# This routine tests whether or not A20 is enabled.  If so, it
+# exits with zf = 0.
+#
+# The memory address used, 0x200, is the int $0x80 vector, which
+# should be safe.
+
+A20_TEST_ADDR = 4*0x80
+
+a20_test:
+	pushw	%cx
+	pushw	%ax
+	xorw	%cx, %cx
+	movw	%cx, %fs			# Low memory
+	decw	%cx
+	movw	%cx, %gs			# High memory area
+	movw	$A20_TEST_LOOPS, %cx
+	movw	%fs:(A20_TEST_ADDR), %ax
+	pushw	%ax
+a20_test_wait:
+	incw	%ax
+	movw	%ax, %fs:(A20_TEST_ADDR)
+	call	delay				# Serialize and make delay constant
+	cmpw	%gs:(A20_TEST_ADDR+0x10), %ax
+	loope	a20_test_wait
+
+	popw	%fs:(A20_TEST_ADDR)
+	popw	%ax
+	popw	%cx
+	ret	
+
+#endif /* CONFIG_X86_VOYAGER */
+
+# This routine checks that the keyboard command queue is empty
+# (after emptying the output buffers)
+#
+# Some machines have delusions that the keyboard buffer is always full
+# with no keyboard attached...
+#
+# If there is no keyboard controller, we will usually get 0xff
+# to all the reads.  With each IO taking a microsecond and
+# a timeout of 100,000 iterations, this can take about half a
+# second ("delay" == outb to port 0x80). That should be ok,
+# and should also be plenty of time for a real keyboard controller
+# to empty.
+#
+
+empty_8042:
+	pushl	%ecx
+	movl	$100000, %ecx
+
+empty_8042_loop:
+	decl	%ecx
+	jz	empty_8042_end_loop
+
+	call	delay
+
+	inb	$0x64, %al			# 8042 status port
+	testb	$1, %al				# output buffer?
+	jz	no_output
+
+	call	delay
+	inb	$0x60, %al			# read it
+	jmp	empty_8042_loop
+
+no_output:
+	testb	$2, %al				# is input buffer full?
+	jnz	empty_8042_loop			# yes - loop
+empty_8042_end_loop:
+	popl	%ecx
+	ret
+
+# Read the cmos clock. Return the seconds in al
+gettime:
+	pushw	%cx
+	movb	$0x02, %ah
+	int	$0x1a
+	movb	%dh, %al			# %dh contains the seconds
+	andb	$0x0f, %al
+	movb	%dh, %ah
+	movb	$0x04, %cl
+	shrb	%cl, %ah
+	aad
+	popw	%cx
+	ret
+
+# Delay is needed after doing I/O
+delay:
+	outb	%al,$0x80
+	ret
+
+# Descriptor tables
+#
+# NOTE: The intel manual says gdt should be sixteen bytes aligned for
+# efficiency reasons.  However, there are machines which are known not
+# to boot with misaligned GDTs, so alter this at your peril!  If you alter
+# GDT_ENTRY_BOOT_CS (in asm/segment.h) remember to leave at least two
+# empty GDT entries (one for NULL and one reserved).
+#
+# NOTE:	On some CPUs, the GDT must be 8 byte aligned.  This is
+# true for the Voyager Quad CPU card which will not boot without
+# This directive.  16 byte aligment is recommended by intel.
+#
+	.align 16
+gdt:
+	.fill GDT_ENTRY_BOOT_CS,8,0
+
+	.word	0xFFFF				# 4Gb - (0x100000*0x1000 = 4Gb)
+	.word	0				# base address = 0
+	.word	0x9A00				# code read/exec
+	.word	0x00CF				# granularity = 4096, 386
+						#  (+5th nibble of limit)
+
+	.word	0xFFFF				# 4Gb - (0x100000*0x1000 = 4Gb)
+	.word	0				# base address = 0
+	.word	0x9200				# data read/write
+	.word	0x00CF				# granularity = 4096, 386
+						#  (+5th nibble of limit)
+gdt_end:
+	.align	4
+	
+	.word	0				# alignment byte
+idt_48:
+	.word	0				# idt limit = 0
+	.word	0, 0				# idt base = 0L
+
+	.word	0				# alignment byte
+gdt_48:
+	.word	gdt_end - gdt - 1		# gdt limit
+	.word	0, 0				# gdt base (filled in later)
+
+# Include video setup & detection code
+
+#include "video.S"
+
+# Setup signature -- must be last
+setup_sig1:	.word	SIG1
+setup_sig2:	.word	SIG2
+
+# After this point, there is some free space which is used by the video mode
+# handling code to store the temporary mode table (not used by the kernel).
+
+modelist:
+
+.text
+endtext:
+.data
+enddata:
+.bss
+endbss:
diff --git a/arch/i386/boot/tools/build.c b/arch/i386/boot/tools/build.c
new file mode 100644
index 0000000..26509b8
--- /dev/null
+++ b/arch/i386/boot/tools/build.c
@@ -0,0 +1,184 @@
+/*
+ *  $Id: build.c,v 1.5 1997/05/19 12:29:58 mj Exp $
+ *
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ *  Copyright (C) 1997 Martin Mares
+ */
+
+/*
+ * This file builds a disk-image from three different files:
+ *
+ * - bootsect: exactly 512 bytes of 8086 machine code, loads the rest
+ * - setup: 8086 machine code, sets up system parm
+ * - system: 80386 code for actual system
+ *
+ * It does some checking that all files are of the correct type, and
+ * just writes the result to stdout, removing headers and padding to
+ * the right amount. It also writes some system data to stderr.
+ */
+
+/*
+ * Changes by tytso to allow root device specification
+ * High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
+ * Cross compiling fixes by Gertjan van Wingerde, July 1996
+ * Rewritten by Martin Mares, April 1997
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/sysmacros.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <asm/boot.h>
+
+typedef unsigned char byte;
+typedef unsigned short word;
+typedef unsigned long u32;
+
+#define DEFAULT_MAJOR_ROOT 0
+#define DEFAULT_MINOR_ROOT 0
+
+/* Minimal number of setup sectors (see also bootsect.S) */
+#define SETUP_SECTS 4
+
+byte buf[1024];
+int fd;
+int is_big_kernel;
+
+void die(const char * str, ...)
+{
+	va_list args;
+	va_start(args, str);
+	vfprintf(stderr, str, args);
+	fputc('\n', stderr);
+	exit(1);
+}
+
+void file_open(const char *name)
+{
+	if ((fd = open(name, O_RDONLY, 0)) < 0)
+		die("Unable to open `%s': %m", name);
+}
+
+void usage(void)
+{
+	die("Usage: build [-b] bootsect setup system [rootdev] [> image]");
+}
+
+int main(int argc, char ** argv)
+{
+	unsigned int i, c, sz, setup_sectors;
+	u32 sys_size;
+	byte major_root, minor_root;
+	struct stat sb;
+
+	if (argc > 2 && !strcmp(argv[1], "-b"))
+	  {
+	    is_big_kernel = 1;
+	    argc--, argv++;
+	  }
+	if ((argc < 4) || (argc > 5))
+		usage();
+	if (argc > 4) {
+		if (!strcmp(argv[4], "CURRENT")) {
+			if (stat("/", &sb)) {
+				perror("/");
+				die("Couldn't stat /");
+			}
+			major_root = major(sb.st_dev);
+			minor_root = minor(sb.st_dev);
+		} else if (strcmp(argv[4], "FLOPPY")) {
+			if (stat(argv[4], &sb)) {
+				perror(argv[4]);
+				die("Couldn't stat root device.");
+			}
+			major_root = major(sb.st_rdev);
+			minor_root = minor(sb.st_rdev);
+		} else {
+			major_root = 0;
+			minor_root = 0;
+		}
+	} else {
+		major_root = DEFAULT_MAJOR_ROOT;
+		minor_root = DEFAULT_MINOR_ROOT;
+	}
+	fprintf(stderr, "Root device is (%d, %d)\n", major_root, minor_root);
+
+	file_open(argv[1]);
+	i = read(fd, buf, sizeof(buf));
+	fprintf(stderr,"Boot sector %d bytes.\n",i);
+	if (i != 512)
+		die("Boot block must be exactly 512 bytes");
+	if (buf[510] != 0x55 || buf[511] != 0xaa)
+		die("Boot block hasn't got boot flag (0xAA55)");
+	buf[508] = minor_root;
+	buf[509] = major_root;
+	if (write(1, buf, 512) != 512)
+		die("Write call failed");
+	close (fd);
+
+	file_open(argv[2]);				    /* Copy the setup code */
+	for (i=0 ; (c=read(fd, buf, sizeof(buf)))>0 ; i+=c )
+		if (write(1, buf, c) != c)
+			die("Write call failed");
+	if (c != 0)
+		die("read-error on `setup'");
+	close (fd);
+
+	setup_sectors = (i + 511) / 512;	/* Pad unused space with zeros */
+	/* for compatibility with ancient versions of LILO. */
+	if (setup_sectors < SETUP_SECTS)
+		setup_sectors = SETUP_SECTS;
+	fprintf(stderr, "Setup is %d bytes.\n", i);
+	memset(buf, 0, sizeof(buf));
+	while (i < setup_sectors * 512) {
+		c = setup_sectors * 512 - i;
+		if (c > sizeof(buf))
+			c = sizeof(buf);
+		if (write(1, buf, c) != c)
+			die("Write call failed");
+		i += c;
+	}
+
+	file_open(argv[3]);
+	if (fstat (fd, &sb))
+		die("Unable to stat `%s': %m", argv[3]);
+	sz = sb.st_size;
+	fprintf (stderr, "System is %d kB\n", sz/1024);
+	sys_size = (sz + 15) / 16;
+	if (!is_big_kernel && sys_size > DEF_SYSSIZE)
+		die("System is too big. Try using bzImage or modules.");
+	while (sz > 0) {
+		int l, n;
+
+		l = (sz > sizeof(buf)) ? sizeof(buf) : sz;
+		if ((n=read(fd, buf, l)) != l) {
+			if (n < 0)
+				die("Error reading %s: %m", argv[3]);
+			else
+				die("%s: Unexpected EOF", argv[3]);
+		}
+		if (write(1, buf, l) != l)
+			die("Write failed");
+		sz -= l;
+	}
+	close(fd);
+
+	if (lseek(1, 497, SEEK_SET) != 497)		    /* Write sizes to the bootsector */
+		die("Output: seek failed");
+	buf[0] = setup_sectors;
+	if (write(1, buf, 1) != 1)
+		die("Write of setup sector count failed");
+	if (lseek(1, 500, SEEK_SET) != 500)
+		die("Output: seek failed");
+	buf[0] = (sys_size & 0xff);
+	buf[1] = ((sys_size >> 8) & 0xff);
+	if (write(1, buf, 2) != 2)
+		die("Write of image length failed");
+
+	return 0;					    /* Everything is OK */
+}
diff --git a/arch/i386/boot/video.S b/arch/i386/boot/video.S
new file mode 100644
index 0000000..925d3f5
--- /dev/null
+++ b/arch/i386/boot/video.S
@@ -0,0 +1,2007 @@
+/*	video.S
+ *
+ *	Display adapter & video mode setup, version 2.13 (14-May-99)
+ *
+ *	Copyright (C) 1995 -- 1998 Martin Mares <mj@ucw.cz>
+ *	Based on the original setup.S code (C) Linus Torvalds and Mats Anderson
+ *
+ *	Rewritten to use GNU 'as' by Chris Noe <stiker@northlink.com> May 1999
+ *
+ *	For further information, look at Documentation/svga.txt.
+ *
+ */
+
+#include <linux/config.h> /* for CONFIG_VIDEO_* */
+
+/* Enable autodetection of SVGA adapters and modes. */
+#undef CONFIG_VIDEO_SVGA
+
+/* Enable autodetection of VESA modes */
+#define CONFIG_VIDEO_VESA
+
+/* Enable compacting of mode table */
+#define CONFIG_VIDEO_COMPACT
+
+/* Retain screen contents when switching modes */
+#define CONFIG_VIDEO_RETAIN
+
+/* Enable local mode list */
+#undef CONFIG_VIDEO_LOCAL
+
+/* Force 400 scan lines for standard modes (hack to fix bad BIOS behaviour */
+#undef CONFIG_VIDEO_400_HACK
+
+/* Hack that lets you force specific BIOS mode ID and specific dimensions */
+#undef CONFIG_VIDEO_GFX_HACK
+#define VIDEO_GFX_BIOS_AX 0x4f02	/* 800x600 on ThinkPad */
+#define VIDEO_GFX_BIOS_BX 0x0102
+#define VIDEO_GFX_DUMMY_RESOLUTION 0x6425	/* 100x37 */
+
+/* This code uses an extended set of video mode numbers. These include:
+ * Aliases for standard modes
+ *	NORMAL_VGA (-1)
+ *	EXTENDED_VGA (-2)
+ *	ASK_VGA (-3)
+ * Video modes numbered by menu position -- NOT RECOMMENDED because of lack
+ * of compatibility when extending the table. These are between 0x00 and 0xff.
+ */
+#define VIDEO_FIRST_MENU 0x0000
+
+/* Standard BIOS video modes (BIOS number + 0x0100) */
+#define VIDEO_FIRST_BIOS 0x0100
+
+/* VESA BIOS video modes (VESA number + 0x0200) */
+#define VIDEO_FIRST_VESA 0x0200
+
+/* Video7 special modes (BIOS number + 0x0900) */
+#define VIDEO_FIRST_V7 0x0900
+
+/* Special video modes */
+#define VIDEO_FIRST_SPECIAL 0x0f00
+#define VIDEO_80x25 0x0f00
+#define VIDEO_8POINT 0x0f01
+#define VIDEO_80x43 0x0f02
+#define VIDEO_80x28 0x0f03
+#define VIDEO_CURRENT_MODE 0x0f04
+#define VIDEO_80x30 0x0f05
+#define VIDEO_80x34 0x0f06
+#define VIDEO_80x60 0x0f07
+#define VIDEO_GFX_HACK 0x0f08
+#define VIDEO_LAST_SPECIAL 0x0f09
+
+/* Video modes given by resolution */
+#define VIDEO_FIRST_RESOLUTION 0x1000
+
+/* The "recalculate timings" flag */
+#define VIDEO_RECALC 0x8000
+
+/* Positions of various video parameters passed to the kernel */
+/* (see also include/linux/tty.h) */
+#define PARAM_CURSOR_POS	0x00
+#define PARAM_VIDEO_PAGE	0x04
+#define PARAM_VIDEO_MODE	0x06
+#define PARAM_VIDEO_COLS	0x07
+#define PARAM_VIDEO_EGA_BX	0x0a
+#define PARAM_VIDEO_LINES	0x0e
+#define PARAM_HAVE_VGA		0x0f
+#define PARAM_FONT_POINTS	0x10
+
+#define PARAM_LFB_WIDTH		0x12
+#define PARAM_LFB_HEIGHT	0x14
+#define PARAM_LFB_DEPTH		0x16
+#define PARAM_LFB_BASE		0x18
+#define PARAM_LFB_SIZE		0x1c
+#define PARAM_LFB_LINELENGTH	0x24
+#define PARAM_LFB_COLORS	0x26
+#define PARAM_VESAPM_SEG	0x2e
+#define PARAM_VESAPM_OFF	0x30
+#define PARAM_LFB_PAGES		0x32
+#define PARAM_VESA_ATTRIB	0x34
+
+/* Define DO_STORE according to CONFIG_VIDEO_RETAIN */
+#ifdef CONFIG_VIDEO_RETAIN
+#define DO_STORE call store_screen
+#else
+#define DO_STORE
+#endif /* CONFIG_VIDEO_RETAIN */
+
+# This is the main entry point called by setup.S
+# %ds *must* be pointing to the bootsector
+video:	pushw	%ds		# We use different segments
+	pushw	%ds		# FS contains original DS
+	popw	%fs
+	pushw	%cs		# DS is equal to CS
+	popw	%ds
+	pushw	%cs		# ES is equal to CS
+	popw	%es
+	xorw	%ax, %ax
+	movw	%ax, %gs	# GS is zero
+	cld
+	call	basic_detect	# Basic adapter type testing (EGA/VGA/MDA/CGA)
+#ifdef CONFIG_VIDEO_SELECT
+	movw	%fs:(0x01fa), %ax		# User selected video mode
+	cmpw	$ASK_VGA, %ax			# Bring up the menu
+	jz	vid2
+
+	call	mode_set			# Set the mode
+	jc	vid1
+
+	leaw	badmdt, %si			# Invalid mode ID
+	call	prtstr
+vid2:	call	mode_menu
+vid1:
+#ifdef CONFIG_VIDEO_RETAIN
+	call	restore_screen			# Restore screen contents
+#endif /* CONFIG_VIDEO_RETAIN */
+	call	store_edid
+#endif /* CONFIG_VIDEO_SELECT */
+	call	mode_params			# Store mode parameters
+	popw	%ds				# Restore original DS
+	ret
+
+# Detect if we have CGA, MDA, EGA or VGA and pass it to the kernel.
+basic_detect:
+	movb	$0, %fs:(PARAM_HAVE_VGA)
+	movb	$0x12, %ah	# Check EGA/VGA
+	movb	$0x10, %bl
+	int	$0x10
+	movw	%bx, %fs:(PARAM_VIDEO_EGA_BX)	# Identifies EGA to the kernel
+	cmpb	$0x10, %bl			# No, it's a CGA/MDA/HGA card.
+	je	basret
+
+	incb	adapter
+	movw	$0x1a00, %ax			# Check EGA or VGA?
+	int	$0x10
+	cmpb	$0x1a, %al			# 1a means VGA...
+	jne	basret				# anything else is EGA.
+	
+	incb	%fs:(PARAM_HAVE_VGA)		# We've detected a VGA
+	incb	adapter
+basret:	ret
+
+# Store the video mode parameters for later usage by the kernel.
+# This is done by asking the BIOS except for the rows/columns
+# parameters in the default 80x25 mode -- these are set directly,
+# because some very obscure BIOSes supply insane values.
+mode_params:
+#ifdef CONFIG_VIDEO_SELECT
+	cmpb	$0, graphic_mode
+	jnz	mopar_gr
+#endif
+	movb	$0x03, %ah			# Read cursor position
+	xorb	%bh, %bh
+	int	$0x10
+	movw	%dx, %fs:(PARAM_CURSOR_POS)
+	movb	$0x0f, %ah			# Read page/mode/width
+	int	$0x10
+	movw	%bx, %fs:(PARAM_VIDEO_PAGE)
+	movw	%ax, %fs:(PARAM_VIDEO_MODE)	# Video mode and screen width
+	cmpb	$0x7, %al			# MDA/HGA => segment differs
+	jnz	mopar0
+
+	movw	$0xb000, video_segment
+mopar0: movw	%gs:(0x485), %ax		# Font size
+	movw	%ax, %fs:(PARAM_FONT_POINTS)	# (valid only on EGA/VGA)
+	movw	force_size, %ax			# Forced size?
+	orw	%ax, %ax
+	jz	mopar1
+
+	movb	%ah, %fs:(PARAM_VIDEO_COLS)
+	movb	%al, %fs:(PARAM_VIDEO_LINES)
+	ret
+
+mopar1:	movb	$25, %al
+	cmpb	$0, adapter			# If we are on CGA/MDA/HGA, the
+	jz	mopar2				# screen must have 25 lines.
+
+	movb	%gs:(0x484), %al		# On EGA/VGA, use the EGA+ BIOS
+	incb	%al				# location of max lines.
+mopar2: movb	%al, %fs:(PARAM_VIDEO_LINES)
+	ret
+
+#ifdef CONFIG_VIDEO_SELECT
+# Fetching of VESA frame buffer parameters
+mopar_gr:
+	leaw	modelist+1024, %di
+	movb	$0x23, %fs:(PARAM_HAVE_VGA)
+	movw	16(%di), %ax
+	movw	%ax, %fs:(PARAM_LFB_LINELENGTH)
+	movw	18(%di), %ax
+	movw	%ax, %fs:(PARAM_LFB_WIDTH)
+	movw	20(%di), %ax
+	movw	%ax, %fs:(PARAM_LFB_HEIGHT)
+	movb	25(%di), %al
+	movb	$0, %ah
+	movw	%ax, %fs:(PARAM_LFB_DEPTH)
+	movb	29(%di), %al	
+	movb	$0, %ah
+	movw	%ax, %fs:(PARAM_LFB_PAGES)
+	movl	40(%di), %eax
+	movl	%eax, %fs:(PARAM_LFB_BASE)
+	movl	31(%di), %eax
+	movl	%eax, %fs:(PARAM_LFB_COLORS)
+	movl	35(%di), %eax
+	movl	%eax, %fs:(PARAM_LFB_COLORS+4)
+	movw	0(%di), %ax
+	movw	%ax, %fs:(PARAM_VESA_ATTRIB)
+
+# get video mem size
+	leaw	modelist+1024, %di
+	movw	$0x4f00, %ax
+	int	$0x10
+	xorl	%eax, %eax
+	movw	18(%di), %ax
+	movl	%eax, %fs:(PARAM_LFB_SIZE)
+
+# switching the DAC to 8-bit is for <= 8 bpp only
+	movw	%fs:(PARAM_LFB_DEPTH), %ax
+	cmpw	$8, %ax
+	jg	dac_done
+
+# get DAC switching capability
+	xorl	%eax, %eax
+	movb	10(%di), %al
+	testb	$1, %al
+	jz	dac_set
+
+# attempt to switch DAC to 8-bit
+	movw	$0x4f08, %ax
+	movw	$0x0800, %bx
+	int	$0x10
+	cmpw	$0x004f, %ax
+	jne     dac_set
+	movb    %bh, dac_size		# store actual DAC size
+
+dac_set:
+# set color size to DAC size
+	movb	dac_size, %al
+	movb	%al, %fs:(PARAM_LFB_COLORS+0)
+	movb	%al, %fs:(PARAM_LFB_COLORS+2)
+	movb	%al, %fs:(PARAM_LFB_COLORS+4)
+	movb	%al, %fs:(PARAM_LFB_COLORS+6)
+
+# set color offsets to 0
+	movb	$0, %fs:(PARAM_LFB_COLORS+1)
+	movb	$0, %fs:(PARAM_LFB_COLORS+3)
+	movb	$0, %fs:(PARAM_LFB_COLORS+5)
+	movb	$0, %fs:(PARAM_LFB_COLORS+7)
+
+dac_done:
+# get protected mode interface informations
+	movw	$0x4f0a, %ax
+	xorw	%bx, %bx
+	xorw	%di, %di
+	int	$0x10
+	cmp	$0x004f, %ax
+	jnz	no_pm
+
+	movw	%es, %fs:(PARAM_VESAPM_SEG)
+	movw	%di, %fs:(PARAM_VESAPM_OFF)
+no_pm:	ret
+
+# The video mode menu
+mode_menu:
+	leaw	keymsg, %si			# "Return/Space/Timeout" message
+	call	prtstr
+	call	flush
+nokey:	call	getkt
+
+	cmpb	$0x0d, %al			# ENTER ?
+	je	listm				# yes - manual mode selection
+
+	cmpb	$0x20, %al			# SPACE ?
+	je	defmd1				# no - repeat
+
+	call 	beep
+	jmp	nokey
+
+defmd1:	ret					# No mode chosen? Default 80x25
+
+listm:	call	mode_table			# List mode table
+listm0:	leaw	name_bann, %si			# Print adapter name
+	call	prtstr
+	movw	card_name, %si
+	orw	%si, %si
+	jnz	an2
+
+	movb	adapter, %al
+	leaw	old_name, %si
+	orb	%al, %al
+	jz	an1
+
+	leaw	ega_name, %si
+	decb	%al
+	jz	an1
+
+	leaw	vga_name, %si
+	jmp	an1
+
+an2:	call	prtstr
+	leaw	svga_name, %si
+an1:	call	prtstr
+	leaw	listhdr, %si			# Table header
+	call	prtstr
+	movb	$0x30, %dl			# DL holds mode number
+	leaw	modelist, %si
+lm1:	cmpw	$ASK_VGA, (%si)			# End?
+	jz	lm2
+
+	movb	%dl, %al			# Menu selection number
+	call	prtchr
+	call	prtsp2
+	lodsw
+	call	prthw				# Mode ID
+	call	prtsp2
+	movb	0x1(%si), %al
+	call	prtdec				# Rows
+	movb	$0x78, %al			# the letter 'x'
+	call	prtchr
+	lodsw
+	call	prtdec				# Columns
+	movb	$0x0d, %al			# New line
+	call	prtchr
+	movb	$0x0a, %al
+	call	prtchr
+	incb	%dl				# Next character
+	cmpb	$0x3a, %dl
+	jnz	lm1
+
+	movb	$0x61, %dl
+	jmp	lm1
+
+lm2:	leaw	prompt, %si			# Mode prompt
+	call	prtstr
+	leaw	edit_buf, %di			# Editor buffer
+lm3:	call	getkey
+	cmpb	$0x0d, %al			# Enter?
+	jz	lment
+
+	cmpb	$0x08, %al			# Backspace?
+	jz	lmbs
+
+	cmpb	$0x20, %al			# Printable?
+	jc	lm3
+
+	cmpw	$edit_buf+4, %di		# Enough space?
+	jz	lm3
+
+	stosb
+	call	prtchr
+	jmp	lm3
+
+lmbs:	cmpw	$edit_buf, %di			# Backspace
+	jz	lm3
+
+	decw	%di
+	movb	$0x08, %al
+	call	prtchr
+	call	prtspc
+	movb	$0x08, %al
+	call	prtchr
+	jmp	lm3
+	
+lment:	movb	$0, (%di)
+	leaw	crlft, %si
+	call	prtstr
+	leaw	edit_buf, %si
+	cmpb	$0, (%si)			# Empty string = default mode
+	jz	lmdef
+
+	cmpb	$0, 1(%si)			# One character = menu selection
+	jz	mnusel
+
+	cmpw	$0x6373, (%si)			# "scan" => mode scanning
+	jnz	lmhx
+
+	cmpw	$0x6e61, 2(%si)
+	jz	lmscan
+
+lmhx:	xorw	%bx, %bx			# Else => mode ID in hex
+lmhex:	lodsb
+	orb	%al, %al
+	jz	lmuse1
+
+	subb	$0x30, %al
+	jc	lmbad
+
+	cmpb	$10, %al
+	jc	lmhx1
+
+	subb	$7, %al
+	andb	$0xdf, %al
+	cmpb	$10, %al
+	jc	lmbad
+
+	cmpb	$16, %al
+	jnc	lmbad
+
+lmhx1:	shlw	$4, %bx
+	orb	%al, %bl
+	jmp	lmhex
+
+lmuse1:	movw	%bx, %ax
+	jmp	lmuse
+
+mnusel:	lodsb					# Menu selection
+	xorb	%ah, %ah
+	subb	$0x30, %al
+	jc	lmbad
+
+	cmpb	$10, %al
+	jc	lmuse
+	
+	cmpb	$0x61-0x30, %al
+	jc	lmbad
+	
+	subb	$0x61-0x30-10, %al
+	cmpb	$36, %al
+	jnc	lmbad
+
+lmuse:	call	mode_set
+	jc	lmdef
+
+lmbad:	leaw	unknt, %si
+	call	prtstr
+	jmp	lm2
+lmscan:	cmpb	$0, adapter			# Scanning only on EGA/VGA
+	jz	lmbad
+
+	movw	$0, mt_end			# Scanning of modes is
+	movb	$1, scanning			# done as new autodetection.
+	call	mode_table
+	jmp	listm0
+lmdef:	ret
+
+# Additional parts of mode_set... (relative jumps, you know)
+setv7:						# Video7 extended modes
+	DO_STORE
+	subb	$VIDEO_FIRST_V7>>8, %bh
+	movw	$0x6f05, %ax
+	int	$0x10
+	stc
+	ret
+
+_setrec:	jmp	setrec			# Ugly...
+_set_80x25:	jmp	set_80x25
+
+# Aliases for backward compatibility.
+setalias:
+	movw	$VIDEO_80x25, %ax
+	incw	%bx
+	jz	mode_set
+
+	movb	$VIDEO_8POINT-VIDEO_FIRST_SPECIAL, %al
+	incw	%bx
+	jnz	setbad				# Fall-through!
+
+# Setting of user mode (AX=mode ID) => CF=success
+mode_set:
+	movw	%ax, %fs:(0x01fa)		# Store mode for use in acpi_wakeup.S
+	movw	%ax, %bx
+	cmpb	$0xff, %ah
+	jz	setalias
+
+	testb	$VIDEO_RECALC>>8, %ah
+	jnz	_setrec
+
+	cmpb	$VIDEO_FIRST_RESOLUTION>>8, %ah
+	jnc	setres
+	
+	cmpb	$VIDEO_FIRST_SPECIAL>>8, %ah
+	jz	setspc
+	
+	cmpb	$VIDEO_FIRST_V7>>8, %ah
+	jz	setv7
+	
+	cmpb	$VIDEO_FIRST_VESA>>8, %ah
+	jnc	check_vesa
+	
+	orb	%ah, %ah
+	jz	setmenu
+	
+	decb	%ah
+	jz	setbios
+
+setbad:	clc
+	movb	$0, do_restore			# The screen needn't be restored
+	ret
+
+setvesa:
+	DO_STORE
+	subb	$VIDEO_FIRST_VESA>>8, %bh
+	movw	$0x4f02, %ax			# VESA BIOS mode set call
+	int	$0x10
+	cmpw	$0x004f, %ax			# AL=4f if implemented
+	jnz	setbad				# AH=0 if OK
+
+	stc
+	ret
+
+setbios:
+	DO_STORE
+	int	$0x10				# Standard BIOS mode set call
+	pushw	%bx
+	movb	$0x0f, %ah			# Check if really set
+	int	$0x10
+	popw	%bx
+	cmpb	%bl, %al
+	jnz	setbad
+	
+	stc
+	ret
+
+setspc:	xorb	%bh, %bh			# Set special mode
+	cmpb	$VIDEO_LAST_SPECIAL-VIDEO_FIRST_SPECIAL, %bl
+	jnc	setbad
+	
+	addw	%bx, %bx
+	jmp	*spec_inits(%bx)
+
+setmenu:
+	orb	%al, %al			# 80x25 is an exception
+	jz	_set_80x25
+	
+	pushw	%bx				# Set mode chosen from menu
+	call	mode_table			# Build the mode table
+	popw	%ax
+	shlw	$2, %ax
+	addw	%ax, %si
+	cmpw	%di, %si
+	jnc	setbad
+	
+	movw	(%si), %ax			# Fetch mode ID
+_m_s:	jmp	mode_set
+
+setres:	pushw	%bx				# Set mode chosen by resolution
+	call	mode_table
+	popw	%bx
+	xchgb	%bl, %bh
+setr1:	lodsw
+	cmpw	$ASK_VGA, %ax			# End of the list?
+	jz	setbad
+	
+	lodsw
+	cmpw	%bx, %ax
+	jnz	setr1
+	
+	movw	-4(%si), %ax			# Fetch mode ID
+	jmp	_m_s
+
+check_vesa:
+	leaw	modelist+1024, %di
+	subb	$VIDEO_FIRST_VESA>>8, %bh
+	movw	%bx, %cx			# Get mode information structure
+	movw	$0x4f01, %ax
+	int	$0x10
+	addb	$VIDEO_FIRST_VESA>>8, %bh
+	cmpw	$0x004f, %ax
+	jnz	setbad
+
+	movb	(%di), %al			# Check capabilities.
+	andb	$0x19, %al
+	cmpb	$0x09, %al
+	jz	setvesa				# This is a text mode
+
+	movb	(%di), %al			# Check capabilities.
+	andb	$0x99, %al
+	cmpb	$0x99, %al
+	jnz	_setbad				# Doh! No linear frame buffer.
+
+	subb	$VIDEO_FIRST_VESA>>8, %bh
+	orw	$0x4000, %bx			# Use linear frame buffer
+	movw	$0x4f02, %ax			# VESA BIOS mode set call
+	int	$0x10
+	cmpw	$0x004f, %ax			# AL=4f if implemented
+	jnz	_setbad				# AH=0 if OK
+
+	movb	$1, graphic_mode		# flag graphic mode
+	movb	$0, do_restore			# no screen restore
+	stc
+	ret
+
+_setbad:	jmp	setbad          	# Ugly...
+
+# Recalculate vertical display end registers -- this fixes various
+# inconsistencies of extended modes on many adapters. Called when
+# the VIDEO_RECALC flag is set in the mode ID.
+
+setrec:	subb	$VIDEO_RECALC>>8, %ah		# Set the base mode
+	call	mode_set
+	jnc	rct3
+
+	movw	%gs:(0x485), %ax		# Font size in pixels
+	movb	%gs:(0x484), %bl		# Number of rows
+	incb	%bl
+	mulb	%bl				# Number of visible
+	decw	%ax				# scan lines - 1
+	movw	$0x3d4, %dx
+	movw	%ax, %bx
+	movb	$0x12, %al			# Lower 8 bits
+	movb	%bl, %ah
+	outw	%ax, %dx
+	movb	$0x07, %al		# Bits 8 and 9 in the overflow register
+	call	inidx
+	xchgb	%al, %ah
+	andb	$0xbd, %ah
+	shrb	%bh
+	jnc	rct1
+	orb	$0x02, %ah
+rct1:	shrb	%bh
+	jnc	rct2
+	orb	$0x40, %ah
+rct2:	movb	$0x07, %al
+	outw	%ax, %dx
+	stc
+rct3:	ret
+
+# Table of routines for setting of the special modes.
+spec_inits:
+	.word	set_80x25
+	.word	set_8pixel
+	.word	set_80x43
+	.word	set_80x28
+	.word	set_current
+	.word	set_80x30
+	.word	set_80x34
+	.word	set_80x60
+	.word	set_gfx
+
+# Set the 80x25 mode. If already set, do nothing.
+set_80x25:
+	movw	$0x5019, force_size		# Override possibly broken BIOS
+use_80x25:
+#ifdef CONFIG_VIDEO_400_HACK
+	movw	$0x1202, %ax			# Force 400 scan lines
+	movb	$0x30, %bl
+	int	$0x10
+#else
+	movb	$0x0f, %ah			# Get current mode ID
+	int	$0x10
+	cmpw	$0x5007, %ax	# Mode 7 (80x25 mono) is the only one available
+	jz	st80		# on CGA/MDA/HGA and is also available on EGAM
+
+	cmpw	$0x5003, %ax	# Unknown mode, force 80x25 color
+	jnz	force3
+
+st80:	cmpb	$0, adapter	# CGA/MDA/HGA => mode 3/7 is always 80x25
+	jz	set80
+
+	movb	%gs:(0x0484), %al	# This is EGA+ -- beware of 80x50 etc.
+	orb	%al, %al		# Some buggy BIOS'es set 0 rows
+	jz	set80
+	
+	cmpb	$24, %al		# It's hopefully correct
+	jz	set80
+#endif /* CONFIG_VIDEO_400_HACK */
+force3:	DO_STORE
+	movw	$0x0003, %ax			# Forced set
+	int	$0x10
+set80:	stc
+	ret
+
+# Set the 80x50/80x43 8-pixel mode. Simple BIOS calls.
+set_8pixel:
+	DO_STORE
+	call	use_80x25			# The base is 80x25
+set_8pt:
+	movw	$0x1112, %ax			# Use 8x8 font
+	xorb	%bl, %bl
+	int	$0x10
+	movw	$0x1200, %ax			# Use alternate print screen
+	movb	$0x20, %bl
+	int	$0x10
+	movw	$0x1201, %ax			# Turn off cursor emulation
+	movb	$0x34, %bl
+	int	$0x10
+	movb	$0x01, %ah			# Define cursor scan lines 6-7
+	movw	$0x0607, %cx
+	int	$0x10
+set_current:
+	stc
+	ret
+
+# Set the 80x28 mode. This mode works on all VGA's, because it's a standard
+# 80x25 mode with 14-point fonts instead of 16-point.
+set_80x28:
+	DO_STORE
+	call	use_80x25			# The base is 80x25
+set14:	movw	$0x1111, %ax			# Use 9x14 font
+	xorb	%bl, %bl
+	int	$0x10
+	movb	$0x01, %ah			# Define cursor scan lines 11-12
+	movw	$0x0b0c, %cx
+	int	$0x10
+	stc
+	ret
+
+# Set the 80x43 mode. This mode is works on all VGA's.
+# It's a 350-scanline mode with 8-pixel font.
+set_80x43:
+	DO_STORE
+	movw	$0x1201, %ax			# Set 350 scans
+	movb	$0x30, %bl
+	int	$0x10
+	movw	$0x0003, %ax			# Reset video mode
+	int	$0x10
+	jmp	set_8pt				# Use 8-pixel font
+
+# Set the 80x30 mode (all VGA's). 480 scanlines, 16-pixel font.
+set_80x30:
+	call	use_80x25			# Start with real 80x25
+	DO_STORE
+	movw	$0x3cc, %dx			# Get CRTC port
+	inb	%dx, %al
+	movb	$0xd4, %dl
+	rorb	%al				# Mono or color?
+	jc	set48a
+
+	movb	$0xb4, %dl
+set48a:	movw	$0x0c11, %ax		# Vertical sync end (also unlocks CR0-7)
+ 	call	outidx
+	movw	$0x0b06, %ax			# Vertical total
+ 	call	outidx
+	movw	$0x3e07, %ax			# (Vertical) overflow
+ 	call	outidx
+	movw	$0xea10, %ax			# Vertical sync start
+ 	call	outidx
+	movw	$0xdf12, %ax			# Vertical display end
+	call	outidx
+	movw	$0xe715, %ax			# Vertical blank start
+ 	call	outidx
+	movw	$0x0416, %ax			# Vertical blank end
+ 	call	outidx
+	pushw	%dx
+	movb	$0xcc, %dl			# Misc output register (read)
+ 	inb	%dx, %al
+ 	movb	$0xc2, %dl			# (write)
+ 	andb	$0x0d, %al	# Preserve clock select bits and color bit
+ 	orb	$0xe2, %al			# Set correct sync polarity
+ 	outb	%al, %dx
+	popw	%dx
+	movw	$0x501e, force_size
+	stc					# That's all.
+	ret
+
+# Set the 80x34 mode (all VGA's). 480 scans, 14-pixel font.
+set_80x34:
+	call	set_80x30			# Set 480 scans
+	call	set14				# And 14-pt font
+	movw	$0xdb12, %ax			# VGA vertical display end
+	movw	$0x5022, force_size
+setvde:	call	outidx
+	stc
+	ret
+
+# Set the 80x60 mode (all VGA's). 480 scans, 8-pixel font.
+set_80x60:
+	call	set_80x30			# Set 480 scans
+	call	set_8pt				# And 8-pt font
+	movw	$0xdf12, %ax			# VGA vertical display end
+	movw	$0x503c, force_size
+	jmp	setvde
+
+# Special hack for ThinkPad graphics
+set_gfx:
+#ifdef CONFIG_VIDEO_GFX_HACK
+	movw	$VIDEO_GFX_BIOS_AX, %ax
+	movw	$VIDEO_GFX_BIOS_BX, %bx
+	int	$0x10
+	movw	$VIDEO_GFX_DUMMY_RESOLUTION, force_size
+	stc
+#endif
+	ret
+
+#ifdef CONFIG_VIDEO_RETAIN
+
+# Store screen contents to temporary buffer.
+store_screen:
+	cmpb	$0, do_restore			# Already stored?
+	jnz	stsr
+
+	testb	$CAN_USE_HEAP, loadflags	# Have we space for storing?
+	jz	stsr
+	
+	pushw	%ax
+	pushw	%bx
+	pushw	force_size			# Don't force specific size
+	movw	$0, force_size
+	call	mode_params			# Obtain params of current mode
+	popw	force_size
+	movb	%fs:(PARAM_VIDEO_LINES), %ah
+	movb	%fs:(PARAM_VIDEO_COLS), %al
+	movw	%ax, %bx			# BX=dimensions
+	mulb	%ah
+	movw	%ax, %cx			# CX=number of characters
+	addw	%ax, %ax			# Calculate image size
+	addw	$modelist+1024+4, %ax
+	cmpw	heap_end_ptr, %ax
+	jnc	sts1				# Unfortunately, out of memory
+
+	movw	%fs:(PARAM_CURSOR_POS), %ax	# Store mode params
+	leaw	modelist+1024, %di
+	stosw
+	movw	%bx, %ax
+	stosw
+	pushw	%ds				# Store the screen
+	movw	video_segment, %ds
+	xorw	%si, %si
+	rep
+	movsw
+	popw	%ds
+	incb	do_restore			# Screen will be restored later
+sts1:	popw	%bx
+	popw	%ax
+stsr:	ret
+
+# Restore screen contents from temporary buffer.
+restore_screen:
+	cmpb	$0, do_restore			# Has the screen been stored?
+	jz	res1
+
+	call	mode_params			# Get parameters of current mode
+	movb	%fs:(PARAM_VIDEO_LINES), %cl
+	movb	%fs:(PARAM_VIDEO_COLS), %ch
+	leaw	modelist+1024, %si		# Screen buffer
+	lodsw					# Set cursor position
+	movw	%ax, %dx
+	cmpb	%cl, %dh
+	jc	res2
+	
+	movb	%cl, %dh
+	decb	%dh
+res2:	cmpb	%ch, %dl
+	jc	res3
+	
+	movb	%ch, %dl
+	decb	%dl
+res3:	movb	$0x02, %ah
+	movb	$0x00, %bh
+	int	$0x10
+	lodsw					# Display size
+	movb	%ah, %dl			# DL=number of lines
+	movb	$0, %ah				# BX=phys. length of orig. line
+	movw	%ax, %bx
+	cmpb	%cl, %dl			# Too many?
+	jc	res4
+
+	pushw	%ax
+	movb	%dl, %al
+	subb	%cl, %al
+	mulb	%bl
+	addw	%ax, %si
+	addw	%ax, %si
+	popw	%ax
+	movb	%cl, %dl
+res4:	cmpb	%ch, %al			# Too wide?
+	jc	res5
+	
+	movb	%ch, %al			# AX=width of src. line
+res5:	movb	$0, %cl
+	xchgb	%ch, %cl
+	movw	%cx, %bp			# BP=width of dest. line
+	pushw	%es
+	movw	video_segment, %es
+	xorw	%di, %di			# Move the data
+	addw	%bx, %bx			# Convert BX and BP to _bytes_
+	addw	%bp, %bp
+res6:	pushw	%si
+	pushw	%di
+	movw	%ax, %cx
+	rep
+	movsw
+	popw	%di
+	popw	%si
+	addw	%bp, %di
+	addw	%bx, %si
+	decb	%dl
+	jnz	res6
+	
+	popw	%es				# Done
+res1:	ret
+#endif /* CONFIG_VIDEO_RETAIN */
+
+# Write to indexed VGA register (AL=index, AH=data, DX=index reg. port)
+outidx:	outb	%al, %dx
+	pushw	%ax
+	movb	%ah, %al
+	incw	%dx
+	outb	%al, %dx
+	decw	%dx
+	popw	%ax
+	ret
+
+# Build the table of video modes (stored after the setup.S code at the
+# `modelist' label. Each video mode record looks like:
+#	.word	MODE-ID		(our special mode ID (see above))
+#	.byte	rows		(number of rows)
+#	.byte	columns		(number of columns)
+# Returns address of the end of the table in DI, the end is marked
+# with a ASK_VGA ID.
+mode_table:
+	movw	mt_end, %di			# Already filled?
+	orw	%di, %di
+	jnz	mtab1x
+	
+	leaw	modelist, %di			# Store standard modes:
+	movl	$VIDEO_80x25 + 0x50190000, %eax	# The 80x25 mode (ALL)
+	stosl
+	movb	adapter, %al			# CGA/MDA/HGA -- no more modes
+	orb	%al, %al
+	jz	mtabe
+	
+	decb	%al
+	jnz	mtabv
+	
+	movl	$VIDEO_8POINT + 0x502b0000, %eax	# The 80x43 EGA mode
+	stosl
+	jmp	mtabe
+
+mtab1x:	jmp	mtab1
+
+mtabv:	leaw	vga_modes, %si			# All modes for std VGA
+	movw	$vga_modes_end-vga_modes, %cx
+	rep	# I'm unable to use movsw as I don't know how to store a half
+	movsb	# of the expression above to cx without using explicit shr.
+
+	cmpb	$0, scanning			# Mode scan requested?
+	jz	mscan1
+	
+	call	mode_scan
+mscan1:
+
+#ifdef CONFIG_VIDEO_LOCAL
+	call	local_modes
+#endif /* CONFIG_VIDEO_LOCAL */
+
+#ifdef CONFIG_VIDEO_VESA
+	call	vesa_modes			# Detect VESA VGA modes
+#endif /* CONFIG_VIDEO_VESA */
+
+#ifdef CONFIG_VIDEO_SVGA
+	cmpb	$0, scanning			# Bypass when scanning
+	jnz	mscan2
+	
+	call	svga_modes			# Detect SVGA cards & modes
+mscan2:
+#endif /* CONFIG_VIDEO_SVGA */
+
+mtabe:
+
+#ifdef CONFIG_VIDEO_COMPACT
+	leaw	modelist, %si
+	movw	%di, %dx
+	movw	%si, %di
+cmt1:	cmpw	%dx, %si			# Scan all modes
+	jz	cmt2
+
+	leaw	modelist, %bx			# Find in previous entries
+	movw	2(%si), %cx
+cmt3:	cmpw	%bx, %si
+	jz	cmt4
+
+	cmpw	2(%bx), %cx			# Found => don't copy this entry
+	jz	cmt5
+
+	addw	$4, %bx
+	jmp	cmt3
+
+cmt4:	movsl					# Copy entry
+	jmp	cmt1
+
+cmt5:	addw	$4, %si				# Skip entry
+	jmp	cmt1
+
+cmt2:
+#endif	/* CONFIG_VIDEO_COMPACT */
+
+	movw	$ASK_VGA, (%di)			# End marker
+	movw	%di, mt_end
+mtab1:	leaw	modelist, %si			# SI=mode list, DI=list end
+ret0:	ret
+
+# Modes usable on all standard VGAs
+vga_modes:
+	.word	VIDEO_8POINT
+	.word	0x5032				# 80x50
+	.word	VIDEO_80x43
+	.word	0x502b				# 80x43
+	.word	VIDEO_80x28
+	.word	0x501c				# 80x28
+	.word	VIDEO_80x30
+	.word	0x501e				# 80x30
+	.word	VIDEO_80x34
+	.word	0x5022				# 80x34
+	.word	VIDEO_80x60
+	.word	0x503c				# 80x60
+#ifdef CONFIG_VIDEO_GFX_HACK
+	.word	VIDEO_GFX_HACK
+	.word	VIDEO_GFX_DUMMY_RESOLUTION
+#endif
+
+vga_modes_end:
+# Detect VESA modes.
+
+#ifdef CONFIG_VIDEO_VESA
+vesa_modes:
+	cmpb	$2, adapter			# VGA only
+	jnz	ret0
+
+	movw	%di, %bp			# BP=original mode table end
+	addw	$0x200, %di			# Buffer space
+	movw	$0x4f00, %ax			# VESA Get card info call
+	int	$0x10
+	movw	%bp, %di
+	cmpw	$0x004f, %ax			# Successful?
+	jnz	ret0
+	
+	cmpw	$0x4556, 0x200(%di)
+	jnz	ret0
+	
+	cmpw	$0x4153, 0x202(%di)
+	jnz	ret0
+	
+	movw	$vesa_name, card_name		# Set name to "VESA VGA"
+	pushw	%gs
+	lgsw	0x20e(%di), %si			# GS:SI=mode list
+	movw	$128, %cx			# Iteration limit
+vesa1:
+# gas version 2.9.1, using BFD version 2.9.1.0.23 buggers the next inst.
+# XXX:	lodsw	%gs:(%si), %ax			# Get next mode in the list
+	gs; lodsw
+	cmpw	$0xffff, %ax			# End of the table?
+	jz	vesar
+	
+	cmpw	$0x0080, %ax			# Check validity of mode ID
+	jc	vesa2
+	
+	orb	%ah, %ah		# Valid IDs: 0x0000-0x007f/0x0100-0x07ff
+	jz	vesan			# Certain BIOSes report 0x80-0xff!
+
+	cmpw	$0x0800, %ax
+	jnc	vesae
+
+vesa2:	pushw	%cx
+	movw	%ax, %cx			# Get mode information structure
+	movw	$0x4f01, %ax
+	int	$0x10
+	movw	%cx, %bx			# BX=mode number
+	addb	$VIDEO_FIRST_VESA>>8, %bh
+	popw	%cx
+	cmpw	$0x004f, %ax
+	jnz	vesan			# Don't report errors (buggy BIOSES)
+
+	movb	(%di), %al			# Check capabilities. We require
+	andb	$0x19, %al			# a color text mode.
+	cmpb	$0x09, %al
+	jnz	vesan
+	
+	cmpw	$0xb800, 8(%di)		# Standard video memory address required
+	jnz	vesan
+
+	testb	$2, (%di)			# Mode characteristics supplied?
+	movw	%bx, (%di)			# Store mode number
+	jz	vesa3
+	
+	xorw	%dx, %dx
+	movw	0x12(%di), %bx			# Width
+	orb	%bh, %bh
+	jnz	vesan
+	
+	movb	%bl, 0x3(%di)
+	movw	0x14(%di), %ax			# Height
+	orb	%ah, %ah
+	jnz	vesan
+	
+	movb	%al, 2(%di)
+	mulb	%bl
+	cmpw	$8193, %ax		# Small enough for Linux console driver?
+	jnc	vesan
+
+	jmp	vesaok
+
+vesa3:	subw	$0x8108, %bx	# This mode has no detailed info specified,
+	jc	vesan		# so it must be a standard VESA mode.
+
+	cmpw	$5, %bx
+	jnc	vesan
+
+	movw	vesa_text_mode_table(%bx), %ax
+	movw	%ax, 2(%di)
+vesaok:	addw	$4, %di				# The mode is valid. Store it.
+vesan:	loop	vesa1			# Next mode. Limit exceeded => error
+vesae:	leaw	vesaer, %si
+	call	prtstr
+	movw	%bp, %di			# Discard already found modes.
+vesar:	popw	%gs
+	ret
+
+# Dimensions of standard VESA text modes
+vesa_text_mode_table:
+	.byte	60, 80				# 0108
+	.byte	25, 132				# 0109
+	.byte	43, 132				# 010A
+	.byte	50, 132				# 010B
+	.byte	60, 132				# 010C
+#endif	/* CONFIG_VIDEO_VESA */
+
+# Scan for video modes. A bit dirty, but should work.
+mode_scan:
+	movw	$0x0100, %cx			# Start with mode 0
+scm1:	movb	$0, %ah				# Test the mode
+	movb	%cl, %al
+	int	$0x10
+	movb	$0x0f, %ah
+	int	$0x10
+	cmpb	%cl, %al
+	jnz	scm2				# Mode not set
+
+	movw	$0x3c0, %dx			# Test if it's a text mode
+	movb	$0x10, %al			# Mode bits
+	call	inidx
+	andb	$0x03, %al
+	jnz	scm2
+	
+	movb	$0xce, %dl			# Another set of mode bits
+	movb	$0x06, %al
+	call	inidx
+	shrb	%al
+	jc	scm2
+	
+	movb	$0xd4, %dl			# Cursor location
+	movb	$0x0f, %al
+	call	inidx
+	orb	%al, %al
+	jnz	scm2
+	
+	movw	%cx, %ax			# Ok, store the mode
+	stosw
+	movb	%gs:(0x484), %al		# Number of rows
+	incb	%al
+	stosb
+	movw	%gs:(0x44a), %ax		# Number of columns
+	stosb
+scm2:	incb	%cl
+	jns	scm1
+	
+	movw	$0x0003, %ax			# Return back to mode 3
+	int	$0x10
+	ret
+
+tstidx:	outw	%ax, %dx			# OUT DX,AX and inidx
+inidx:	outb	%al, %dx			# Read from indexed VGA register
+	incw	%dx			# AL=index, DX=index reg port -> AL=data
+	inb	%dx, %al
+	decw	%dx
+	ret
+
+# Try to detect type of SVGA card and supply (usually approximate) video
+# mode table for it.
+
+#ifdef CONFIG_VIDEO_SVGA
+svga_modes:
+	leaw	svga_table, %si			# Test all known SVGA adapters
+dosvga:	lodsw
+	movw	%ax, %bp			# Default mode table
+	orw	%ax, %ax
+	jz	didsv1
+
+	lodsw					# Pointer to test routine
+	pushw	%si
+	pushw	%di
+	pushw	%es
+	movw	$0xc000, %bx
+	movw	%bx, %es
+	call	*%ax				# Call test routine
+	popw	%es
+	popw	%di
+	popw	%si
+	orw	%bp, %bp
+	jz	dosvga
+	
+	movw	%bp, %si			# Found, copy the modes
+	movb	svga_prefix, %ah
+cpsvga:	lodsb
+	orb	%al, %al
+	jz	didsv
+	
+	stosw
+	movsw
+	jmp	cpsvga
+
+didsv:	movw	%si, card_name			# Store pointer to card name
+didsv1:	ret
+
+# Table of all known SVGA cards. For each card, we store a pointer to
+# a table of video modes supported by the card and a pointer to a routine
+# used for testing of presence of the card. The video mode table is always
+# followed by the name of the card or the chipset.
+svga_table:
+	.word	ati_md, ati_test
+	.word	oak_md, oak_test
+	.word	paradise_md, paradise_test
+	.word	realtek_md, realtek_test
+	.word	s3_md, s3_test
+	.word	chips_md, chips_test
+	.word	video7_md, video7_test
+	.word	cirrus5_md, cirrus5_test
+	.word	cirrus6_md, cirrus6_test
+	.word	cirrus1_md, cirrus1_test
+	.word	ahead_md, ahead_test
+	.word	everex_md, everex_test
+	.word	genoa_md, genoa_test
+	.word	trident_md, trident_test
+	.word	tseng_md, tseng_test
+	.word	0
+
+# Test routines and mode tables:
+
+# S3 - The test algorithm was taken from the SuperProbe package
+# for XFree86 1.2.1. Report bugs to Christoph.Niemann@linux.org
+s3_test:
+	movw	$0x0f35, %cx	# we store some constants in cl/ch
+	movw	$0x03d4, %dx
+	movb	$0x38, %al
+	call	inidx
+	movb	%al, %bh	# store current CRT-register 0x38
+	movw	$0x0038, %ax
+	call	outidx		# disable writing to special regs
+	movb	%cl, %al	# check whether we can write special reg 0x35
+	call	inidx
+	movb	%al, %bl	# save the current value of CRT reg 0x35
+	andb	$0xf0, %al	# clear bits 0-3
+	movb	%al, %ah
+	movb	%cl, %al	# and write it to CRT reg 0x35
+	call	outidx
+	call	inidx		# now read it back
+	andb	%ch, %al	# clear the upper 4 bits
+	jz	s3_2		# the first test failed. But we have a
+
+	movb	%bl, %ah	# second chance
+	movb	%cl, %al
+	call	outidx
+	jmp	s3_1		# do the other tests
+
+s3_2:	movw	%cx, %ax	# load ah with 0xf and al with 0x35
+	orb	%bl, %ah	# set the upper 4 bits of ah with the orig value
+	call	outidx		# write ...
+	call	inidx		# ... and reread 
+	andb	%cl, %al	# turn off the upper 4 bits
+	pushw	%ax
+	movb	%bl, %ah	# restore old value in register 0x35
+	movb	%cl, %al
+	call	outidx
+	popw	%ax
+	cmpb	%ch, %al	# setting lower 4 bits was successful => bad
+	je	no_s3		# writing is allowed => this is not an S3
+
+s3_1:	movw	$0x4838, %ax	# allow writing to special regs by putting
+	call	outidx		# magic number into CRT-register 0x38
+	movb	%cl, %al	# check whether we can write special reg 0x35
+	call	inidx
+	movb	%al, %bl
+	andb	$0xf0, %al
+	movb	%al, %ah
+	movb	%cl, %al
+	call	outidx
+	call	inidx
+	andb	%ch, %al
+	jnz	no_s3		# no, we can't write => no S3
+
+	movw	%cx, %ax
+	orb	%bl, %ah
+	call	outidx
+	call	inidx
+	andb	%ch, %al
+	pushw	%ax
+	movb	%bl, %ah	# restore old value in register 0x35
+	movb	%cl, %al
+	call	outidx
+	popw	%ax
+	cmpb	%ch, %al
+	jne	no_s31		# writing not possible => no S3
+	movb	$0x30, %al
+	call	inidx		# now get the S3 id ...
+	leaw	idS3, %di
+	movw	$0x10, %cx
+	repne
+	scasb
+	je	no_s31
+
+	movb	%bh, %ah
+	movb	$0x38, %al
+	jmp	s3rest
+
+no_s3:	movb	$0x35, %al	# restore CRT register 0x35
+	movb	%bl, %ah
+	call	outidx
+no_s31:	xorw	%bp, %bp	# Detection failed
+s3rest:	movb	%bh, %ah
+	movb	$0x38, %al	# restore old value of CRT register 0x38
+	jmp	outidx
+
+idS3:	.byte	0x81, 0x82, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95
+	.byte	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa8, 0xb0
+
+s3_md:	.byte	0x54, 0x2b, 0x84
+	.byte	0x55, 0x19, 0x84
+	.byte	0
+	.ascii	"S3"
+	.byte	0
+
+# ATI cards.
+ati_test:
+	leaw 	idati, %si
+	movw	$0x31, %di
+	movw	$0x09, %cx
+	repe
+	cmpsb
+	je	atiok
+
+	xorw	%bp, %bp
+atiok:	ret
+
+idati:	.ascii	"761295520"
+
+ati_md:	.byte	0x23, 0x19, 0x84
+	.byte	0x33, 0x2c, 0x84
+	.byte	0x22, 0x1e, 0x64
+	.byte	0x21, 0x19, 0x64
+	.byte	0x58, 0x21, 0x50
+	.byte	0x5b, 0x1e, 0x50
+	.byte	0
+	.ascii	"ATI"
+	.byte	0
+
+# AHEAD
+ahead_test:
+	movw	$0x200f, %ax
+	movw	$0x3ce, %dx
+	outw	%ax, %dx
+	incw	%dx
+	inb	%dx, %al
+	cmpb	$0x20, %al
+	je	isahed
+
+	cmpb	$0x21, %al
+	je	isahed
+	
+	xorw	%bp, %bp
+isahed:	ret
+
+ahead_md:
+	.byte	0x22, 0x2c, 0x84
+	.byte	0x23, 0x19, 0x84
+	.byte	0x24, 0x1c, 0x84
+	.byte	0x2f, 0x32, 0xa0
+	.byte	0x32, 0x22, 0x50
+	.byte	0x34, 0x42, 0x50
+	.byte	0
+	.ascii	"Ahead"
+	.byte	0
+
+# Chips & Tech.
+chips_test:
+	movw	$0x3c3, %dx
+	inb	%dx, %al
+	orb	$0x10, %al
+	outb	%al, %dx
+	movw	$0x104, %dx
+	inb	%dx, %al
+	movb	%al, %bl
+	movw	$0x3c3, %dx
+	inb	%dx, %al
+	andb	$0xef, %al
+	outb	%al, %dx
+	cmpb	$0xa5, %bl
+	je	cantok
+	
+	xorw	%bp, %bp
+cantok:	ret
+
+chips_md:
+	.byte	0x60, 0x19, 0x84
+	.byte	0x61, 0x32, 0x84
+	.byte	0
+	.ascii	"Chips & Technologies"
+	.byte	0
+
+# Cirrus Logic 5X0
+cirrus1_test:
+	movw	$0x3d4, %dx
+	movb	$0x0c, %al
+	outb	%al, %dx
+	incw	%dx
+	inb	%dx, %al
+	movb	%al, %bl
+	xorb	%al, %al
+	outb	%al, %dx
+	decw	%dx
+	movb	$0x1f, %al
+	outb	%al, %dx
+	incw	%dx
+	inb	%dx, %al
+	movb	%al, %bh
+	xorb	%ah, %ah
+	shlb	$4, %al
+	movw	%ax, %cx
+	movb	%bh, %al
+	shrb	$4, %al
+	addw	%ax, %cx
+	shlw	$8, %cx
+	addw	$6, %cx
+	movw	%cx, %ax
+	movw	$0x3c4, %dx
+	outw	%ax, %dx
+	incw	%dx
+	inb	%dx, %al
+	andb	%al, %al
+	jnz	nocirr
+	
+	movb	%bh, %al
+	outb	%al, %dx
+	inb	%dx, %al
+	cmpb	$0x01, %al
+	je	iscirr
+
+nocirr:	xorw	%bp, %bp
+iscirr: movw	$0x3d4, %dx
+	movb	%bl, %al
+	xorb	%ah, %ah
+	shlw	$8, %ax
+	addw	$0x0c, %ax
+	outw	%ax, %dx
+	ret
+
+cirrus1_md:
+	.byte	0x1f, 0x19, 0x84
+	.byte	0x20, 0x2c, 0x84
+	.byte	0x22, 0x1e, 0x84
+	.byte	0x31, 0x25, 0x64
+	.byte	0
+	.ascii	"Cirrus Logic 5X0"
+	.byte	0
+
+# Cirrus Logic 54XX
+cirrus5_test:
+	movw	$0x3c4, %dx
+	movb	$6, %al
+	call	inidx
+	movb	%al, %bl			# BL=backup
+	movw	$6, %ax
+	call	tstidx
+	cmpb	$0x0f, %al
+	jne	c5fail
+	
+	movw	$0x1206, %ax
+	call	tstidx
+	cmpb	$0x12, %al
+	jne	c5fail
+	
+	movb	$0x1e, %al
+	call	inidx
+	movb	%al, %bh
+	movb	%bh, %ah
+	andb	$0xc0, %ah
+	movb	$0x1e, %al
+	call	tstidx
+	andb	$0x3f, %al
+	jne	c5xx
+	
+	movb	$0x1e, %al
+	movb	%bh, %ah
+	orb	$0x3f, %ah
+	call	tstidx
+	xorb	$0x3f, %al
+	andb	$0x3f, %al
+c5xx:	pushf
+	movb	$0x1e, %al
+	movb	%bh, %ah
+	outw	%ax, %dx
+	popf
+	je	c5done
+
+c5fail:	xorw	%bp, %bp
+c5done:	movb	$6, %al
+	movb	%bl, %ah
+	outw	%ax, %dx
+	ret
+
+cirrus5_md:
+	.byte	0x14, 0x19, 0x84
+	.byte	0x54, 0x2b, 0x84
+	.byte	0
+	.ascii	"Cirrus Logic 54XX"
+	.byte	0
+
+# Cirrus Logic 64XX -- no known extra modes, but must be identified, because
+# it's misidentified by the Ahead test.
+cirrus6_test:
+	movw	$0x3ce, %dx
+	movb	$0x0a, %al
+	call	inidx
+	movb	%al, %bl	# BL=backup
+	movw	$0xce0a, %ax
+	call	tstidx
+	orb	%al, %al
+	jne	c2fail
+	
+	movw	$0xec0a, %ax
+	call	tstidx
+	cmpb	$0x01, %al
+	jne	c2fail
+	
+	movb	$0xaa, %al
+	call	inidx		# 4X, 5X, 7X and 8X are valid 64XX chip ID's. 
+	shrb	$4, %al
+	subb	$4, %al
+	jz	c6done
+	
+	decb	%al
+	jz	c6done
+	
+	subb	$2, %al
+	jz	c6done
+	
+	decb	%al
+	jz	c6done
+	
+c2fail:	xorw	%bp, %bp
+c6done:	movb	$0x0a, %al
+	movb	%bl, %ah
+	outw	%ax, %dx
+	ret
+
+cirrus6_md:
+	.byte	0
+	.ascii	"Cirrus Logic 64XX"
+	.byte	0
+
+# Everex / Trident
+everex_test:
+	movw	$0x7000, %ax
+	xorw	%bx, %bx
+	int	$0x10
+	cmpb	$0x70, %al
+	jne	noevrx
+	
+	shrw	$4, %dx
+	cmpw	$0x678, %dx
+	je	evtrid
+	
+	cmpw	$0x236, %dx
+	jne	evrxok
+
+evtrid:	leaw	trident_md, %bp
+evrxok:	ret
+
+noevrx:	xorw	%bp, %bp
+	ret
+
+everex_md:
+	.byte	0x03, 0x22, 0x50
+	.byte	0x04, 0x3c, 0x50
+	.byte	0x07, 0x2b, 0x64
+	.byte	0x08, 0x4b, 0x64
+	.byte	0x0a, 0x19, 0x84
+	.byte	0x0b, 0x2c, 0x84
+	.byte	0x16, 0x1e, 0x50
+	.byte	0x18, 0x1b, 0x64
+	.byte	0x21, 0x40, 0xa0
+	.byte	0x40, 0x1e, 0x84
+	.byte	0
+	.ascii	"Everex/Trident"
+	.byte	0
+
+# Genoa.
+genoa_test:
+	leaw	idgenoa, %si			# Check Genoa 'clues'
+	xorw	%ax, %ax
+	movb	%es:(0x37), %al
+	movw	%ax, %di
+	movw	$0x04, %cx
+	decw	%si
+	decw	%di
+l1:	incw	%si
+	incw	%di
+	movb	(%si), %al
+	testb	%al, %al
+	jz	l2
+
+	cmpb	%es:(%di), %al
+l2:	loope 	l1
+	orw	%cx, %cx
+	je	isgen
+	
+	xorw	%bp, %bp
+isgen:	ret
+
+idgenoa: .byte	0x77, 0x00, 0x99, 0x66
+
+genoa_md:
+	.byte	0x58, 0x20, 0x50
+	.byte	0x5a, 0x2a, 0x64
+	.byte	0x60, 0x19, 0x84
+	.byte	0x61, 0x1d, 0x84
+	.byte	0x62, 0x20, 0x84
+	.byte	0x63, 0x2c, 0x84
+	.byte	0x64, 0x3c, 0x84
+	.byte	0x6b, 0x4f, 0x64
+	.byte	0x72, 0x3c, 0x50
+	.byte	0x74, 0x42, 0x50
+	.byte	0x78, 0x4b, 0x64
+	.byte	0
+	.ascii	"Genoa"
+	.byte	0
+
+# OAK
+oak_test:
+	leaw	idoakvga, %si
+	movw	$0x08, %di
+	movw	$0x08, %cx
+	repe
+	cmpsb
+	je	isoak
+	
+	xorw	%bp, %bp
+isoak:	ret
+
+idoakvga: .ascii  "OAK VGA "
+
+oak_md: .byte	0x4e, 0x3c, 0x50
+	.byte	0x4f, 0x3c, 0x84
+	.byte	0x50, 0x19, 0x84
+	.byte	0x51, 0x2b, 0x84
+	.byte	0
+	.ascii	"OAK"
+	.byte	0
+
+# WD Paradise.
+paradise_test:
+	leaw	idparadise, %si
+	movw	$0x7d, %di
+	movw	$0x04, %cx
+	repe
+	cmpsb
+	je	ispara
+	
+	xorw	%bp, %bp
+ispara:	ret
+
+idparadise:	.ascii	"VGA="
+
+paradise_md:
+	.byte	0x41, 0x22, 0x50
+	.byte	0x47, 0x1c, 0x84
+	.byte	0x55, 0x19, 0x84
+	.byte	0x54, 0x2c, 0x84
+	.byte	0
+	.ascii	"Paradise"
+	.byte	0
+
+# Trident.
+trident_test:
+	movw	$0x3c4, %dx
+	movb	$0x0e, %al
+	outb	%al, %dx
+	incw	%dx
+	inb	%dx, %al
+	xchgb	%al, %ah
+	xorb	%al, %al
+	outb	%al, %dx
+	inb	%dx, %al
+	xchgb	%ah, %al
+	movb	%al, %bl	# Strange thing ... in the book this wasn't
+	andb	$0x02, %bl	# necessary but it worked on my card which
+	jz	setb2		# is a trident. Without it the screen goes
+				# blurred ...
+	andb	$0xfd, %al
+	jmp	clrb2		
+
+setb2:	orb	$0x02, %al	
+clrb2:	outb	%al, %dx
+	andb	$0x0f, %ah
+	cmpb	$0x02, %ah
+	je	istrid
+
+	xorw	%bp, %bp
+istrid:	ret
+
+trident_md:
+	.byte	0x50, 0x1e, 0x50
+	.byte	0x51, 0x2b, 0x50
+	.byte	0x52, 0x3c, 0x50
+	.byte	0x57, 0x19, 0x84
+	.byte	0x58, 0x1e, 0x84
+	.byte	0x59, 0x2b, 0x84
+	.byte	0x5a, 0x3c, 0x84
+	.byte	0
+	.ascii	"Trident"
+	.byte	0
+
+# Tseng.
+tseng_test:
+	movw	$0x3cd, %dx
+	inb	%dx, %al	# Could things be this simple ! :-)
+	movb	%al, %bl
+	movb	$0x55, %al
+	outb	%al, %dx
+	inb	%dx, %al
+	movb	%al, %ah
+	movb	%bl, %al
+	outb	%al, %dx
+	cmpb	$0x55, %ah
+ 	je	istsen
+
+isnot:	xorw	%bp, %bp
+istsen:	ret
+
+tseng_md:
+	.byte	0x26, 0x3c, 0x50
+	.byte	0x2a, 0x28, 0x64
+	.byte	0x23, 0x19, 0x84
+	.byte	0x24, 0x1c, 0x84
+	.byte	0x22, 0x2c, 0x84
+	.byte	0x21, 0x3c, 0x84
+	.byte	0
+	.ascii	"Tseng"
+	.byte	0
+
+# Video7.
+video7_test:
+	movw	$0x3cc, %dx
+	inb	%dx, %al
+	movw	$0x3b4, %dx
+	andb	$0x01, %al
+	jz	even7
+
+	movw	$0x3d4, %dx
+even7:	movb	$0x0c, %al
+	outb	%al, %dx
+	incw	%dx
+	inb	%dx, %al
+	movb	%al, %bl
+	movb	$0x55, %al
+	outb	%al, %dx
+	inb	%dx, %al
+	decw	%dx
+	movb	$0x1f, %al
+	outb	%al, %dx
+	incw	%dx
+	inb	%dx, %al
+	movb	%al, %bh
+	decw	%dx
+	movb	$0x0c, %al
+	outb	%al, %dx
+	incw	%dx
+	movb	%bl, %al
+	outb	%al, %dx
+	movb	$0x55, %al
+	xorb	$0xea, %al
+	cmpb	%bh, %al
+	jne	isnot
+	
+	movb	$VIDEO_FIRST_V7>>8, svga_prefix # Use special mode switching
+	ret
+
+video7_md:
+	.byte	0x40, 0x2b, 0x50
+	.byte	0x43, 0x3c, 0x50
+	.byte	0x44, 0x3c, 0x64
+	.byte	0x41, 0x19, 0x84
+	.byte	0x42, 0x2c, 0x84
+	.byte	0x45, 0x1c, 0x84
+	.byte	0
+	.ascii	"Video 7"
+	.byte	0
+
+# Realtek VGA
+realtek_test:
+	leaw	idrtvga, %si
+	movw	$0x45, %di
+	movw	$0x0b, %cx
+	repe
+	cmpsb
+	je	isrt
+	
+	xorw	%bp, %bp
+isrt:	ret
+
+idrtvga:	.ascii	"REALTEK VGA"
+
+realtek_md:
+	.byte	0x1a, 0x3c, 0x50
+	.byte	0x1b, 0x19, 0x84
+	.byte	0x1c, 0x1e, 0x84
+	.byte	0x1d, 0x2b, 0x84
+	.byte	0x1e, 0x3c, 0x84
+	.byte	0
+	.ascii	"REALTEK"
+	.byte	0
+
+#endif	/* CONFIG_VIDEO_SVGA */
+
+# User-defined local mode table (VGA only)
+#ifdef CONFIG_VIDEO_LOCAL
+local_modes:
+	leaw	local_mode_table, %si
+locm1:	lodsw
+	orw	%ax, %ax
+	jz	locm2
+	
+	stosw
+	movsw
+	jmp	locm1
+
+locm2:	ret
+
+# This is the table of local video modes which can be supplied manually
+# by the user. Each entry consists of mode ID (word) and dimensions
+# (byte for column count and another byte for row count). These modes
+# are placed before all SVGA and VESA modes and override them if table
+# compacting is enabled. The table must end with a zero word followed
+# by NUL-terminated video adapter name.
+local_mode_table:
+	.word	0x0100				# Example: 40x25
+	.byte	25,40
+	.word	0
+	.ascii	"Local"
+	.byte	0
+#endif	/* CONFIG_VIDEO_LOCAL */
+
+# Read a key and return the ASCII code in al, scan code in ah
+getkey:	xorb	%ah, %ah
+	int	$0x16
+	ret
+
+# Read a key with a timeout of 30 seconds.
+# The hardware clock is used to get the time.
+getkt:	call	gettime
+	addb	$30, %al			# Wait 30 seconds
+	cmpb	$60, %al
+	jl	lminute
+
+	subb	$60, %al
+lminute:
+	movb	%al, %cl
+again:	movb	$0x01, %ah
+	int	$0x16
+	jnz	getkey				# key pressed, so get it
+
+	call	gettime
+	cmpb	%cl, %al
+	jne	again
+
+	movb	$0x20, %al			# timeout, return `space'
+	ret
+
+# Flush the keyboard buffer
+flush:	movb	$0x01, %ah
+	int	$0x16
+	jz	empty
+	
+	xorb	%ah, %ah
+	int	$0x16
+	jmp	flush
+
+empty:	ret
+
+# Print hexadecimal number.
+prthw:	pushw	%ax
+	movb	%ah, %al
+	call	prthb
+	popw	%ax
+prthb:	pushw	%ax
+	shrb	$4, %al
+	call	prthn
+	popw	%ax
+	andb	$0x0f, %al
+prthn:	cmpb	$0x0a, %al
+	jc	prth1
+
+	addb	$0x07, %al
+prth1:	addb	$0x30, %al
+	jmp	prtchr
+
+# Print decimal number in al
+prtdec:	pushw	%ax
+	pushw	%cx
+	xorb	%ah, %ah
+	movb	$0x0a, %cl
+	idivb	%cl
+	cmpb	$0x09, %al
+	jbe	lt100
+
+	call	prtdec
+	jmp	skip10
+
+lt100:	addb	$0x30, %al
+	call	prtchr
+skip10:	movb	%ah, %al
+	addb	$0x30, %al
+	call	prtchr	
+	popw	%cx
+	popw	%ax
+	ret
+
+store_edid:
+	pushw	%es				# just save all registers 
+	pushw	%ax				
+	pushw	%bx
+	pushw   %cx
+	pushw	%dx
+	pushw   %di
+
+	pushw	%fs                             
+	popw    %es
+
+	movl	$0x13131313, %eax		# memset block with 0x13
+	movw    $32, %cx
+	movw	$0x140, %di
+	cld
+	rep 
+	stosl  
+
+	movw	$0x4f15, %ax                    # do VBE/DDC 
+	movw	$0x01, %bx
+	movw	$0x00, %cx
+	movw    $0x01, %dx
+	movw	$0x140, %di
+	int	$0x10	
+
+	popw	%di				# restore all registers        
+	popw	%dx
+	popw	%cx
+	popw	%bx
+	popw	%ax
+	popw	%es	
+	ret
+
+# VIDEO_SELECT-only variables
+mt_end:		.word	0	# End of video mode table if built
+edit_buf:	.space	6	# Line editor buffer
+card_name:	.word	0	# Pointer to adapter name
+scanning:	.byte	0	# Performing mode scan
+do_restore:	.byte	0	# Screen contents altered during mode change
+svga_prefix:	.byte	VIDEO_FIRST_BIOS>>8	# Default prefix for BIOS modes
+graphic_mode:	.byte	0	# Graphic mode with a linear frame buffer
+dac_size:	.byte	6	# DAC bit depth
+
+# Status messages
+keymsg:		.ascii	"Press <RETURN> to see video modes available, "
+		.ascii	"<SPACE> to continue or wait 30 secs"
+		.byte	0x0d, 0x0a, 0
+
+listhdr:	.byte	0x0d, 0x0a
+		.ascii	"Mode:    COLSxROWS:"
+
+crlft:		.byte	0x0d, 0x0a, 0
+
+prompt:		.byte	0x0d, 0x0a
+		.asciz	"Enter mode number or `scan': "
+
+unknt:		.asciz	"Unknown mode ID. Try again."
+
+badmdt:		.ascii	"You passed an undefined mode number."
+		.byte	0x0d, 0x0a, 0
+
+vesaer:		.ascii	"Error: Scanning of VESA modes failed. Please "
+		.ascii	"report to <mj@ucw.cz>."
+		.byte	0x0d, 0x0a, 0
+
+old_name:	.asciz	"CGA/MDA/HGA"
+
+ega_name:	.asciz	"EGA"
+
+svga_name:	.ascii	" "
+
+vga_name:	.asciz	"VGA"
+
+vesa_name:	.asciz	"VESA"
+
+name_bann:	.asciz	"Video adapter: "
+#endif /* CONFIG_VIDEO_SELECT */
+
+# Other variables:
+adapter:	.byte	0	# Video adapter: 0=CGA/MDA/HGA,1=EGA,2=VGA
+video_segment:	.word	0xb800	# Video memory segment
+force_size:	.word	0	# Use this size instead of the one in BIOS vars