From a5ce2341ec04f333297cef729892cf886710ea89 Mon Sep 17 00:00:00 2001
From: Li-Ta Lo <ollie@lanl.gov>
Date: Fri, 17 Mar 2006 19:52:52 +0000
Subject: reformating, we are going to use it for vsa on geode GX.

There was some bug in setting up stack, what was that?


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2208 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
---
 src/mainboard/via/epia-m/vgabios.c | 590 ++++++++++++++++++-------------------
 1 file changed, 284 insertions(+), 306 deletions(-)

(limited to 'src/mainboard/via/epia-m')

diff --git a/src/mainboard/via/epia-m/vgabios.c b/src/mainboard/via/epia-m/vgabios.c
index 67620eaa2e..8565ba2236 100644
--- a/src/mainboard/via/epia-m/vgabios.c
+++ b/src/mainboard/via/epia-m/vgabios.c
@@ -77,56 +77,56 @@
    Core part of the bios no longer sets up any 16 bit segments */
 __asm__ (
 	/* pointer to original gdt */
-	"gdtarg:			\n\t"
-	".word	gdt_limit	\n\t"
-	".long	gdt			\n\t"		
+	"gdtarg:			\n"
+	"	.word	gdt_limit	\n"
+	"	.long	gdt	       	\n"		
 
 	/* compute the table limit */
-	"__mygdt_limit = __mygdt_end - __mygdt - 1	\n\t"
+	"__mygdt_limit = __mygdt_end - __mygdt - 1	\n"
 
-	"__mygdtaddr:			\n\t"
-	".word	__mygdt_limit	\n\t"
-	".long	__mygdt			\n\t"		
+	"__mygdtaddr:			\n"
+	"	.word	__mygdt_limit  	\n"
+	"	.long	__mygdt	       	\n"
 
-
-	"__mygdt: 				\n\t"
+	"__mygdt: 		       	\n"
 	/* selgdt 0, unused */
-	".word	0x0000, 0x0000	\n\t"
-	".byte	0x00, 0x00, 0x00, 0x00	\n\t"
+	"	.word	0x0000, 0x0000	\n"
+	"	.byte	0x00, 0x00, 0x00, 0x00	\n"
 
 	/* selgdt 8, unused */
-	".word	0x0000, 0x0000			\n\t"
-	".byte	0x00, 0x00, 0x00, 0x00	\n\t"
+	"	.word	0x0000, 0x0000	       	\n"
+	"	.byte	0x00, 0x00, 0x00, 0x00	\n"
 
 	/* selgdt 0x10, flat code segment */
-	".word	0xffff, 0x0000			\n\t"		
-	".byte	0x00, 0x9b, 0xcf, 0x00	\n\t"	
+	"	.word	0xffff, 0x0000	       	\n"
+	"	.byte	0x00, 0x9b, 0xcf, 0x00	\n"	
 
 	/* selgdt 0x18, flat data segment */
-	".word	0xffff, 0x0000			\n\t"		
-	".byte	0x00, 0x93, 0xcf, 0x00	\n\t"
+	"	.word	0xffff, 0x0000	       	\n"
+	"	.byte	0x00, 0x93, 0xcf, 0x00	\n"
 
 	/* selgdt 0x20, unused */
-	".word	0x0000, 0x0000			\n\t"
-	".byte	0x00, 0x00, 0x00, 0x00	\n\t"
+	"	.word	0x0000, 0x0000	       	\n"
+	"	.byte	0x00, 0x00, 0x00, 0x00	\n"
 
-        /*selgdt 0x28 16-bit 64k code at 0x00000000 */
-	".word 0xffff, 0x0000			\n\t"
-	".byte 0, 0x9a, 0, 0			\n\t"
+        /* selgdt 0x28 16-bit 64k code at 0x00000000 */
+	"	.word	0xffff, 0x0000	       	\n"
+	"	.byte	0, 0x9a, 0, 0	       	\n"
 
 	/* selgdt 0x30 16-bit 64k data at 0x00000000 */
-	".word 0xffff, 0x0000			\n\t"
-	".byte 0, 0x92, 0, 0			\n\t"
+	"	.word	0xffff, 0x0000	       	\n"
+	"	.byte	0, 0x92, 0, 0	       	\n"
 
-	"__mygdt_end:					\n\t"
+	"__mygdt_end:				\n"
 );
 
 /* Declare a pointer to where our idt is going to be i.e. at mem zero */
-__asm__ (
-	"__myidt:	\n"
-	"    .word 1023	\n"
-	"    .long 0 \n"
-	"    .word 0 \n"
+__asm__ ("__myidt:		\n"
+	 /* 16-bit limit */
+	 "	.word 1023	\n"
+	 /* 24-bit base */
+	 "	.long 0		\n"
+	 "	.word 0		\n"
 );
 
 /* The address arguments to this function are PHYSICAL ADDRESSES */ 
@@ -135,92 +135,93 @@ static void real_mode_switch_call_vga(unsigned long devfn)
 	__asm__ __volatile__ (
 		// paranoia -- does ecx get saved? not sure. This is 
 		// the easiest safe thing to do.
-		"	pushal\n"
+		"	pushal			\n"
 		/* save the stack */
-		"	mov %esp, __stack\n"
-		"	jmp 1f\n"
-		"__stack: .long 0\n"
+		"	mov 	%esp, __stack	\n"
+		"	jmp 	1f		\n"
+		"__stack: .long 0		\n"
 		"1:\n"
 		/* get devfn into %ecx */
-		"	movl    %esp, %ebp\n"
-		"	movl    8(%ebp), %ecx\n"
+		"	movl    %esp, %ebp	\n"
+		"	movl    8(%ebp), %ecx	\n"
 		/* load 'our' gdt */
-		"   lgdt %cs:__mygdtaddr		\n\t"
+		"	lgdt	%cs:__mygdtaddr	\n"
 
 		/*  This configures CS properly for real mode. */
-		"	ljmp $0x28, $__rms_16bit\n"
-		"__rms_16bit:                 \n"
-		".code16                      \n"
+		"	ljmp	$0x28, $__rms_16bit\n"
+		"__rms_16bit:		  	\n"
+		"	.code16			\n"
 		/* 16 bit code from here on... */
 
 		/* Load the segment registers w/ properly configured segment
 		 * descriptors.  They will retain these configurations (limits,
 		 * writability, etc.) once protected mode is turned off. */
-		"	mov  $0x30, %ax         \n"
-		"	mov  %ax, %ds          \n"
-		"	mov  %ax, %es          \n"
-		"	mov  %ax, %fs          \n"
-		"	mov  %ax, %gs          \n"
-		"	mov  %ax, %ss          \n"
+		"	mov	$0x30, %ax	\n"
+		"	mov	%ax, %ds       	\n"
+		"	mov	%ax, %es       	\n"
+		"	mov	%ax, %fs       	\n"
+		"	mov	%ax, %gs       	\n"
+		"	mov	%ax, %ss       	\n"
 
 		/* Turn off protection (bit 0 in CR0) */
-		"	movl %cr0, %eax        \n"
-		"	andl $0xFFFFFFFE, %eax  \n"
-		"	movl %eax, %cr0        \n"
+		"	movl	%cr0, %eax	\n"
+		"	andl	$0xFFFFFFFE, %eax \n"
+		"	movl	%eax, %cr0	\n"
 
 		/* Now really going into real mode */
-		"	ljmp $0,  $__rms_real \n"
-		"__rms_real:                  \n"
+		"	ljmp	$0,  $__rms_real\n"
+		"__rms_real:			\n"
 
-		// put the stack at the end of page zero. 
-		// that way we can easily share it between real and protected, 
-		// since the 16-bit ESP at segment 0 will work for any case. 
+		/* put the stack at the end of page zero. 
+		 * that way we can easily share it between real and protected, 
+		 * since the 16-bit ESP at segment 0 will work for any case. 
 		/* Setup a stack */
-		"    mov  $0x0, %ax       \n"
-		"    mov  %ax, %ss          \n"
-		"    movl  $0x1000, %eax       \n"
-		"    movl  %eax, %esp          \n"
+		"	mov	$0x0, %ax	\n"
+		"	mov	%ax, %ss	\n"
+		"	movl	$0x1000, %eax	\n"
+		"	movl	%eax, %esp	\n"
 
 		/* Load our 16 it idt */
-		"    xor  %ax, %ax          \n"
-		"    mov  %ax, %ds          \n"
-		"    lidt __myidt            \n"
-
+		"	xor	%ax, %ax	\n"
+		"	mov	%ax, %ds	\n"
+		"	lidt	__myidt		\n"
 
 		/* Dump zeros in the other segregs */
-		"    mov  %ax, %es          \n"
-		"    mov  %ax, %fs          \n"
-		"    mov  %ax, %gs          \n"
-		"    mov  $0x40, %ax          \n"
-		"    mov  %ax, %ds          \n"
-		"    mov %cx, %ax	\n"
-		/* go run the code */
-		" .byte 0x9a, 0x03, 0, 0, 0xc0  \n"
+		"	mov	%ax, %es       	\n"
+		"	mov	%ax, %fs       	\n"
+		"	mov	%ax, %gs       	\n"
+		"	mov	$0x40, %ax	\n"
+		"	mov	%ax, %ds	\n"
+		"	mov	%cx, %ax	\n"
+
+		/* run VGA BIOS at 0xc000:0003 */
+		"	lcall	$0xc000, $0x0003\n"
 
 		/* if we got here, just about done. 
 		 * Need to get back to protected mode */
-		"movl	%cr0, %eax\n"
-		"orl	$0x0000001, %eax\n" /* PE = 1 */
-		"movl	%eax, %cr0\n"
+		"	movl	%cr0, %eax	\n"
+		"	orl	$0x0000001, %eax\n" /* PE = 1 */
+		"	movl	%eax, %cr0	\n"
 
 		/* Now that we are in protected mode jump to a 32 bit code segment. */
-		"data32	ljmp	$0x10, $vgarestart\n"
+		"	data32	ljmp	$0x10, $vgarestart\n"
 		"vgarestart:\n"
-		".code32\n"
-		"    movw $0x18, %ax          \n"
-		"    mov  %ax, %ds          \n"
-		"    mov  %ax, %es          \n"
-		"    mov  %ax, %fs          \n"
-		"    mov  %ax, %gs          \n"
-		"    mov  %ax, %ss          \n"
+		"	.code32\n"
+		"	movw	$0x18, %ax     	\n"
+		"	mov	%ax, %ds       	\n"
+		"	mov	%ax, %es	\n"
+		"	mov	%ax, %fs	\n"
+		"	mov	%ax, %gs	\n"
+		"	mov	%ax, %ss	\n"
 
 		/* restore proper gdt and idt */
-		"	 lgdt %cs:gdtarg			\n"
-		"    lidt idtarg            \n"
-		".globl vga_exit\n"
-		"vga_exit:\n"
-		"    mov  __stack, %esp\n"
-		"    popal\n"
+		"	lgdt	%cs:gdtarg	\n"
+		"	lidt	idtarg		\n"
+
+		".globl vga_exit		\n"
+		"vga_exit:			\n"
+		"	mov	__stack, %esp	\n"
+		"	popal			\n"
 		);
 }
 
@@ -228,109 +229,109 @@ __asm__ (".text\n""real_mode_switch_end:\n");
 extern char real_mode_switch_end[];
 
 /* call vga bios int 10 function 0x4f14 to enable main console 
-   epia-m does not always autosence the main console so forcing it on is good !! */
- 
+   epia-m does not always autosence the main console so forcing it on is good !! */ 
 void vga_enable_console()
 {
 	__asm__ __volatile__ (
-		// paranoia -- does ecx get saved? not sure. This is 
-		// the easiest safe thing to do.
-		"	pushal\n"
+		/* paranoia -- does ecx get saved? not sure. This is 
+		 * the easiest safe thing to do. */
+		"	pushal			\n"
 		/* save the stack */
-		"	mov %esp, __stack\n"
+		"	mov	%esp, __stack	\n"
 
 		/* load 'our' gdt */
-		"   lgdt %cs:__mygdtaddr		\n\t"
+		"	lgdt 	%cs:__mygdtaddr	\n"
 
 		/*  This configures CS properly for real mode. */
-		"	ljmp $0x28, $__vga_ec_16bit\n"
-		"__vga_ec_16bit:                 \n"
-		".code16                      \n"
+		"	ljmp 	$0x28, $__vga_ec_16bit\n"
+		"__vga_ec_16bit:		\n"
+		"	.code16			\n"
 		/* 16 bit code from here on... */
 
 		/* Load the segment registers w/ properly configured segment
 		 * descriptors.  They will retain these configurations (limits,
 		 * writability, etc.) once protected mode is turned off. */
-		"	mov  $0x30, %ax         \n"
-		"	mov  %ax, %ds          \n"
-		"	mov  %ax, %es          \n"
-		"	mov  %ax, %fs          \n"
-		"	mov  %ax, %gs          \n"
-		"	mov  %ax, %ss          \n"
+		"	mov	$0x30, %ax     	\n"
+		"	mov	%ax, %ds       	\n"
+		"	mov	%ax, %es       	\n"
+		"	mov	%ax, %fs       	\n"
+		"	mov	%ax, %gs       	\n"
+		"	mov	%ax, %ss       	\n"
 
 		/* Turn off protection (bit 0 in CR0) */
-		"	movl %cr0, %eax        \n"
-		"	andl $0xFFFFFFFE, %eax  \n"
-		"	movl %eax, %cr0        \n"
+		"	movl	%cr0, %eax     	\n"
+		"	andl	$0xFFFFFFFE, %eax\n"
+		"	movl	%eax, %cr0     	\n"
 
 		/* Now really going into real mode */
-		"	ljmp $0,  $__vga_ec_real \n"
+		"	ljmp	$0, $__vga_ec_real \n"
 		"__vga_ec_real:                  \n"
 
-		// put the stack at the end of page zero. 
-		// that way we can easily share it between real and protected, 
-		// since the 16-bit ESP at segment 0 will work for any case. 
+		/* put the stack at the end of page zero. 
+		 * that way we can easily share it between real and protected, 
+		 * since the 16-bit ESP at segment 0 will work for any case. 
 		/* Setup a stack */
-		"    mov  $0x0, %ax       \n"
-		"    mov  %ax, %ss          \n"
-		"    movl  $0x1000, %eax       \n"
-		"    movl  %eax, %esp          \n"
+		"	mov	$0x0, %ax	\n"
+		"	mov	%ax, %ss	\n"
+		"	movl	$0x1000, %eax	\n"
+		"	movl	%eax, %esp	\n"
+
 		/* debugging for RGM */
-		"    mov $0x11, %al	\n"
-		" outb	%al, $0x80\n"
+		"	mov	$0x11, %al	\n"
+		"	outb	%al, $0x80	\n"
 
 		/* Load our 16 it idt */
-		"    xor  %ax, %ax          \n"
-		"    mov  %ax, %ds          \n"
-		"    lidt __myidt            \n"
+		"	xor	%ax, %ax       	\n"
+		"	mov	%ax, %ds	\n"
+		"	lidt	__myidt		\n"
 
 		/* Dump zeros in the other segregs */
-		"    mov  %ax, %ds          \n"
-		"    mov  %ax, %es          \n"
-		"    mov  %ax, %fs          \n"
-		"    mov  %ax, %gs          \n"
+		"	mov	%ax, %ds	\n"
+		"	mov	%ax, %es	\n"
+		"	mov	%ax, %fs	\n"
+		"	mov	%ax, %gs	\n"
 
 		/* ask bios to enable main console */
-		/* set up for int 10 call - values found from X server bios call routines */
-		"    movw $0x4f14,%ax    \n"
-		"    movw $0x8003,%bx     \n"
-		"    movw $1, %cx          \n"
-		"    movw $0, %dx          \n"
-		"    movw $0, %di          \n"
-		"  .byte 0xcd, 0x10             \n"
-		" movb $0x55, %al\noutb %al, $0x80\n"
+		/* set up for int 10 call - values found from X server
+		 * bios call routines */
+		"	movw	$0x4f14,%ax	\n"
+		"	movw	$0x8003,%bx	\n"
+		"	movw	$1, %cx		\n"
+		"	movw	$0, %dx		\n"
+		"	movw	$0, %di		\n"
+		"	int	$0x10		\n"
+
+		"	movb	$0x55, %al	\n"
+		"	outb	%al, $0x80	\n"
 
 		/* if we got here, just about done. 
 		 * Need to get back to protected mode */
-		"movl	%cr0, %eax\n"
-		"orl	$0x0000001, %eax\n" /* PE = 1 */
-		"movl	%eax, %cr0\n"
+		"	movl	%cr0, %eax	\n"
+		"	orl	$0x0000001, %eax\n" /* PE = 1 */
+		"	movl	%eax, %cr0	\n"
 
 		/* Now that we are in protected mode jump to a 32 bit code segment. */
-		"data32	ljmp	$0x10, $vga_ec_restart\n"
+		"	data32	ljmp	$0x10, $vga_ec_restart\n"
 		"vga_ec_restart:\n"
-		".code32\n"
-		"    movw $0x18, %ax          \n"
-		"    mov  %ax, %ds          \n"
-		"    mov  %ax, %es          \n"
-		"    mov  %ax, %fs          \n"
-		"    mov  %ax, %gs          \n"
-		"    mov  %ax, %ss          \n"
-
+		"	.code32\n"
+		"	movw	$0x18, %ax	\n"
+		"	mov	%ax, %ds	\n"
+		"	mov	%ax, %es	\n"
+		"	mov	%ax, %fs	\n"
+		"	mov	%ax, %gs	\n"
+		"	mov	%ax, %ss	\n"
 
 		/* restore proper gdt and idt */
-		"	 lgdt %cs:gdtarg			\n"
-		"    lidt idtarg            \n"
-		".globl vga__ec_exit\n"
+		"	lgdt	%cs:gdtarg 	\n"
+		"	lidt	idtarg		\n"
+		"	.globl	vga__ec_exit	\n"
 		"vga_ec_exit:\n"
-		"    mov  __stack, %esp\n"
-		"    popal\n"
+		"	mov	__stack, %esp	\n"
+		"	popal\n"
 		);
 }
 
-
-void
-do_vgabios(void)
+void do_vgabios(void)
 {
 	device_t dev;
 	unsigned long busdevfn;
@@ -340,19 +341,20 @@ do_vgabios(void)
 	int i;
 	
 	/* clear vga bios data area */
-	for (i=0x400; i<0x500; i++) {
+	for (i = 0x400; i < 0x500; i++) {
 		*(unsigned char *) i = 0;
 	}
 
 	dev = dev_find_class(PCI_CLASS_DISPLAY_VGA<<8 , 0);
 
-	if (! dev) {
+	if (!dev) {
 		printk_debug("NO VGA FOUND\n");
 		return;
 	}
 	printk_debug("found VGA: vid=%x, did=%x\n", dev->vendor, dev->device);
-	
-	/* declare rom address here - keep any config data out of the way of core LXB stuff */
+
+	/* declare rom address here - keep any config data out of the way
+	 * of core LXB stuff */
 
 	rom = 0xfffc0000;
 	pci_write_config32(dev, PCI_ROM_ADDRESS, rom|1);
@@ -373,12 +375,10 @@ do_vgabios(void)
 		    	real_mode_switch_call_vga(busdevfn);
 		} else
 			printk_debug("Failed to copy VGA BIOS to 0xc0000\n");
-		
 	} else 
 		printk_debug("BAD SIGNATURE 0x%x 0x%x\n", buf[0], buf[1]);
-	
-	pci_write_config32(dev, PCI_ROM_ADDRESS, 0);
 
+	pci_write_config32(dev, PCI_ROM_ADDRESS, 0);
 }
 
 
@@ -405,33 +405,33 @@ struct realidt {
 // more complex code in linuxbios itself. This helps a lot as we don't
 // have to do address fixup in this little stub, and calls are absolute
 // so the handler is relocatable.
-void handler(void) {
+void handler(void)
+{
 	__asm__ __volatile__ ( 
-		".code16\n"
-		"idthandle:\n"
-		"	pushal\n"
-		"	movb $0, %al\n"
-		"	ljmp $0, $callbiosint16\n"
-		"end_idthandle:\n"
-		".code32\n"
+		"	.code16		\n"
+		"idthandle:		\n"
+		"	pushal		\n"
+		"	movb 	$0, %al	\n"
+		"	ljmp 	$0, $callbiosint16\n"
+		"end_idthandle:		\n"
+		"	.code32		\n"
 		);
-
 }
 
-void debughandler(void) {
+void debughandler(void)
+{
 	__asm__ __volatile__ ( 
-		".code16\n"
-		"debughandle:\n"
-		"   pushw %cx  \n"
-		"   movw  $250, %cx \n"
-		"dbh1:         \n"
-		"	loop dbh1  \n"
-		"   popw %cx   \n"
-		"	iret \n"
-		"end_debughandle:\n"
-		".code32\n"
+		"	.code16		\n"
+		"debughandle:		\n"
+		"	pushw	%cx	\n"
+		"	movw	$250, %cx \n"
+		"dbh1:			\n"
+		"	loop	dbh1	\n"
+		"	popw	%cx	\n"
+		"	iret		\n"
+		"end_debughandle:	\n"
+		".code32		\n"
 		);
-
 }
 
 // Calling conventions. The first C function is called with this stuff
@@ -440,136 +440,118 @@ void debughandler(void) {
 // the C function will call the biosint function with these as
 // REFERENCE parameters. In this way, we can easily get 
 // returns back to the INTx caller (i.e. vgabios)
-void callbiosint(void) {
+void callbiosint(void)
+{
 	__asm__ __volatile__ (
-		".code16\n"
-		"callbiosint16:\n"
-		" push %ds \n"
-		" push %es \n"
-		" push %fs \n"
-		" push %gs \n"
+		"	.code16		\n"
+		"callbiosint16:		\n"
+		"	push	%ds	\n"
+		"	push	%es	\n"
+		"	push	%fs	\n"
+		"	push	%gs	\n"
 		// clean up the int #. To save space we put it in the lower
 		// byte. But the top 24 bits are junk. 
-		"andl $0xff, %eax\n"
+		"	andl	$0xff, %eax\n"
 		// this push does two things:
 		// - put the INT # on the stack as a parameter
 		// - provides us with a temp for the %cr0 mods.
-		"pushl	%eax\n"
-		"movl    %cr0, %eax\n"
-		//"andl    $0x7FFAFFD1, %eax\n" /* PG,AM,WP,NE,TS,EM,MP = 0 */
-		//"orl    $0x60000001, %eax\n" /* CD, NW, PE = 1 */
-		"orl    $0x00000001, %eax\n" /* PE = 1 */
-		"movl    %eax, %cr0\n"
+		"	pushl	%eax	\n"
+		"	movl    %cr0, %eax\n"
+		"	orl	$0x00000001, %eax\n" /* PE = 1 */
+		"	movl	%eax, %cr0\n"
 		/* Now that we are in protected mode jump to a 32 bit code segment. */
-		"data32  ljmp    $0x10, $biosprotect\n"
-		"biosprotect:\n"
-		".code32\n"
-		"    movw $0x18, %ax          \n"
-		"    mov  %ax, %ds          \n"
-		"    mov  %ax, %es          \n"
-		"    mov  %ax, %fs          \n"
-		"    mov  %ax, %gs          \n"
-		"    mov  %ax, %ss          \n"
-		"   lidt idtarg         \n"
+		"	data32  ljmp    $0x10, $biosprotect\n"
+		"biosprotect:		\n"
+		"	.code32		\n"
+		"	movw	$0x18, %ax          \n"
+		"	mov	%ax, %ds          \n"
+		"	mov	%ax, %es          \n"
+		"	mov	%ax, %fs          \n"
+		"	mov	%ax, %gs          \n"
+		"	mov	%ax, %ss          \n"
+		"	lidt	idtarg         \n"
 		"	call	biosint	\n"
 		// back to real mode ...
-		"    ljmp $0x28, $__rms_16bit2\n"
-		"__rms_16bit2:                 \n"
-		".code16                      \n" /* 16 bit code from here on... */
-		
+		"	ljmp	$0x28, $__rms_16bit2\n"
+		"__rms_16bit2:			\n"
+		"	.code16			\n"
+		/* 16 bit code from here on... */
 		/* Load the segment registers w/ properly configured segment
 		 * descriptors.  They will retain these configurations (limits,
 		 * writability, etc.) once protected mode is turned off. */
-		"    mov  $0x30, %ax         \n"
-		"    mov  %ax, %ds          \n"
-		"    mov  %ax, %es          \n"
-		"    mov  %ax, %fs          \n"
-		"    mov  %ax, %gs          \n"
-		"    mov  %ax, %ss          \n"
+		"	mov	$0x30, %ax	\n"
+		"	mov	%ax, %ds	\n"
+		"	mov	%ax, %es	\n"
+		"	mov	%ax, %fs	\n"
+		"	mov	%ax, %gs	\n"
+		"	mov	%ax, %ss	\n"
 		
 		/* Turn off protection (bit 0 in CR0) */
-		"    movl %cr0, %eax        \n"
-		"    andl $0xFFFFFFFE, %eax  \n"
-		"    movl %eax, %cr0        \n"
-		
+		"	movl	%cr0, %eax		\n"
+		"	andl	$0xFFFFFFFE, %eax	\n"
+		"	movl	%eax, %cr0		\n"
+
 		/* Now really going into real mode */
-		"    ljmp $0,  $__rms_real2 \n"
-		"__rms_real2:                  \n"
-		
-		/* Setup a stack */
-		"    mov  $0x0, %ax       \n"
-		"    mov  %ax, %ss          \n"
+		"	ljmp $0,  $__rms_real2	\n"
+		"__rms_real2:			\n"
+
+		/* Setup a stack
+		 * FixME: where is esp? */
+		"	mov	$0x0, %ax       \n"
+		"	mov	%ax, %ss	\n"
+
 		/* ebugging for RGM */
-		"    mov $0x11, %al      \n"
-		" outb  %al, $0x80\n"
-		"    xor  %ax, %ax          \n"
-		"    mov  %ax, %ds          \n"
-		"    lidt __myidt           \n"
-		"    mov  %ax, %es          \n"
-		"    mov  %ax, %fs          \n"
-		"    mov  %ax, %gs          \n"
-		"    mov  $0x40, %ax        \n"
-		"    mov  %ax, %ds          \n"
-		// pop the INT # that you pushed earlier
-		"   popl	%eax\n"
-		"   pop %gs \n"
-		"   pop %fs \n"
-		"   pop %es \n"
-		"   pop %ds \n"
-		"   popal\n"
-		"   iret\n"
-		".code32\n"
+		"	mov	$0x11, %al	\n"
+		"	outb	%al, $0x80	\n"
+
+		/* Load our 16 it idt */
+		"	xor	%ax, %ax	\n"
+		"	mov	%ax, %ds	\n"
+		"	lidt	__myidt		\n"
+
+		/* Dump zeros in the other segregs */
+		"	mov	%ax, %es	\n"
+		"	mov	%ax, %fs	\n"
+		"	mov	%ax, %gs	\n"
+		"	mov	$0x40, %ax	\n"
+		"	mov	%ax, %ds	\n"
+
+		/* pop the INT # that you pushed earlier */
+		"	popl	%eax		\n"
+		"	pop	%gs		\n"
+		"	pop	%fs		\n"
+		"	pop	%es		\n"
+		"	pop	%ds		\n"
+		"	popal			\n"
+		"	iret			\n"
+		"	.code32			\n"
 		);
 }
 
-
 enum {
 	PCIBIOS = 0x1a, 
 	MEMSIZE = 0x12
 };
-int
-pcibios(
-        unsigned long *pedi,
-        unsigned long *pesi,
-        unsigned long *pebp,
-        unsigned long *pesp,
-        unsigned long *pebx,
-        unsigned long *pedx,
-        unsigned long *pecx,
-        unsigned long *peax,
-        unsigned long *pflags
-        );
-int
-handleint21(
-        unsigned long *pedi,
-        unsigned long *pesi,
-        unsigned long *pebp,
-        unsigned long *pesp,
-        unsigned long *pebx,
-        unsigned long *pedx,
-        unsigned long *pecx,
-        unsigned long *peax,
-        unsigned long *pflags
+
+int pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
+	    unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
+	    unsigned long *pecx, unsigned long *peax, unsigned long *pflags);
+
+int handleint21(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
+		unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
+		unsigned long *pecx, unsigned long *peax, unsigned long *pflags
         );
 
 extern void vga_exit(void);
 
-int
-biosint(
-	unsigned long intnumber,
-	unsigned long gsfs,
-	unsigned long dses,
-	unsigned long edi, 
-	unsigned long esi,
-	unsigned long ebp, 
-	unsigned long esp, 
-	unsigned long ebx, 
-	unsigned long edx, 
-	unsigned long ecx, 
-	unsigned long eax, 
-	unsigned long cs_ip,
-	unsigned short stackflags
-	) {
+int biosint(unsigned long intnumber,
+	    unsigned long gsfs, unsigned long dses,
+	    unsigned long edi, unsigned long esi,
+	    unsigned long ebp, unsigned long esp, 
+	    unsigned long ebx, unsigned long edx, 
+	    unsigned long ecx, unsigned long eax, 
+	    unsigned long cs_ip, unsigned short stackflags)
+{
 	unsigned long ip; 
 	unsigned long cs; 
 	unsigned long flags;
@@ -579,10 +561,14 @@ biosint(
 	cs = cs_ip >> 16;
 	flags = stackflags;
 	
-	printk_debug("biosint: # 0x%lx, eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n", 
-		     intnumber, eax, ebx, ecx, edx);
-	printk_debug("biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n", ebp, esp, edi, esi);
-	printk_debug("biosint: ip 0x%x cs 0x%x flags 0x%x\n", ip, cs, flags);
+	printk_debug("biosint: INT# 0x%lx\n", intnumber);
+	printk_debug("biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n", 
+		      eax, ebx, ecx, edx);
+	printk_debug("biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n",
+		     ebp, esp, edi, esi);
+	printk_debug("biosint:  ip 0x%x   cs 0x%x  flags 0x%x\n",
+		     ip, cs, flags);
+
 	// cases in a good compiler are just as good as your own tables. 
 	switch (intnumber) {
 	case 0 ... 15:
@@ -667,8 +653,8 @@ void setup_realmode_idt(void)
 	intbyte = codeptr + 3;
 	*intbyte = 0x42; /* int42 is the relocated int10 */
 
-	/* debug handler - useful to set a programmable delay between instructions if the TF bit is set upon
-           call to real mode */
+	/* debug handler - useful to set a programmable delay between instructions if the
+	   TF bit is set upon call to real mode */
 	idts[1].cs = 0;
 	idts[1].offset = 16384;
 	memcpy(16384, &debughandle, &end_debughandle - &debughandle);
@@ -697,17 +683,10 @@ enum {
 };
 
 int
-pcibios(
-	unsigned long *pedi, 
-	unsigned long *pesi,
-	unsigned long *pebp, 
-	unsigned long *pesp, 
-	unsigned long *pebx, 
-	unsigned long *pedx, 
-	unsigned long *pecx, 
-	unsigned long *peax, 
-	unsigned long *pflags
-	) {
+pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, 
+	unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, 
+	unsigned long *pecx, unsigned long *peax, unsigned long *pflags)
+{
 	unsigned long edi = *pedi;
 	unsigned long esi = *pesi;
 	unsigned long ebp = *pebp;
@@ -808,7 +787,8 @@ pcibios(
 		
 		if (retval) 
 			retval = PCIBIOS_BADREG;
-		printk_debug("0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n", func, bus, devfn, reg, *pecx);
+		printk_debug("0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n",
+			     func, bus, devfn, reg, *pecx);
 		*peax = 0;
 		retval = 0;
 	}
@@ -821,13 +801,11 @@ pcibios(
 	return retval;
 } 
 
-
-
-int handleint21( unsigned long *edi, unsigned long *esi, unsigned long *ebp,
-			  unsigned long *esp, unsigned long *ebx, unsigned long *edx,
-			  unsigned long *ecx, unsigned long *eax, unsigned long *flags)
+int handleint21(unsigned long *edi, unsigned long *esi, unsigned long *ebp,
+		unsigned long *esp, unsigned long *ebx, unsigned long *edx,
+		unsigned long *ecx, unsigned long *eax, unsigned long *flags)
 {
-int res=-1;
+	int res=-1;
 	switch(*eax&0xffff)
 	{
 	case 0x5f19:
-- 
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