x86: Remove unused real mode code

This code is pretty old and we want to support only 32-bit systems now.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Graeme Russ <graeme.russ@gmail.com>

README

@@ -3820,11 +3820,6 @@ Low Level (hardware related) configuration options:
 		If defined, the x86 reset vector code is included. This is not
 		needed when U-Boot is running from Coreboot.
 
-- CONFIG_X86_NO_REAL_MODE
-		If defined, x86 real mode code is omitted. This assumes a
-		32-bit environment where such code is not needed. You will
-		need to do this when U-Boot is running from Coreboot.
-
 
 Freescale QE/FMAN Firmware Support:
 -----------------------------------

arch/x86/include/asm/realmode.h

@@ -1,36 +0,0 @@
-/*
- * (C) Copyright 2002
- * Daniel Engström, Omicron Ceti AB, daniel@omicron.se
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#ifndef __ASM_REALMODE_H_
-#define __ASM_REALMODE_H_
-#include <asm/ptrace.h>
-
-extern ulong __realmode_start;
-extern ulong __realmode_size;
-extern char realmode_enter;
-
-int bios_setup(void);
-int enter_realmode(u16 seg, u16 off, struct pt_regs *in, struct pt_regs *out);
-int enter_realmode_int(u8 lvl, struct pt_regs *in, struct pt_regs *out);
-
-#endif

arch/x86/lib/Makefile

@@ -25,16 +25,6 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(ARCH).o
 
-ifeq ($(CONFIG_X86_NO_REAL_MODE),)
-SOBJS-$(CONFIG_SYS_PC_BIOS)	+= bios.o
-SOBJS-$(CONFIG_SYS_PCI_BIOS)	+= bios_pci.o
-COBJS-y	+= realmode.o
-SOBJS-y	+= realmode_switch.o
-
-COBJS-$(CONFIG_SYS_PC_BIOS)	+= bios_setup.o
-COBJS-$(CONFIG_VIDEO_VGA)	+= video_bios.o
-endif
-
 COBJS-y	+= board.o
 COBJS-y	+= bootm.o
 COBJS-y	+= cmd_boot.o

arch/x86/lib/bios.S

@@ -1,569 +0,0 @@
-/*
- * (C) Copyright 2002
- * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-/*
- * Based on msbios.c from rolo 1.6:
- *----------------------------------------------------------------------
- * (C) Copyright 2000
- * Sysgo Real-Time Solutions GmbH
- * Klein-Winternheim, Germany
- *----------------------------------------------------------------------
- */
-
-#include "bios.h"
-
-/*
- * During it's initialization phase, before switching to protected
- * mode, the Linux Kernel makes a few BIOS calls. This won't work
- * if the board does not have a BIOS.
- *
- * This is a very minimalisic BIOS that supplies just enough
- * functionality to keep the Linux Kernel happy. It is NOT
- * a general purpose replacement for a real BIOS !!
- */
-
-.section .bios, "ax"
-.code16
-.org 0
-	/* a call to f000:0 should warmboot */
-	jmp	realmode_reset
-
-.globl rm_int00
-.hidden rm_int00
-.type rm_int00, @function
-rm_int00:
-	pushw	$0
-	jmp	any_interrupt16
-.globl rm_int01
-.hidden rm_int01
-.type rm_int01, @function
-rm_int01:
-	pushw	$1
-	jmp	any_interrupt16
-.globl rm_int02
-.hidden rm_int02
-.type rm_int02, @function
-rm_int02:
-	pushw	$2
-	jmp	any_interrupt16
-.globl rm_int03
-.hidden rm_int03
-.type rm_int03, @function
-rm_int03:
-	pushw	$3
-	jmp	any_interrupt16
-.globl rm_int04
-.hidden rm_int04
-.type rm_int04, @function
-rm_int04:
-	pushw	$4
-	jmp	any_interrupt16
-.globl rm_int05
-.hidden rm_int05
-.type rm_int05, @function
-rm_int05:
-	pushw	$5
-	jmp	any_interrupt16
-.globl rm_int06
-.hidden rm_int06
-.type rm_int06, @function
-rm_int06:
-	pushw	$6
-	jmp	any_interrupt16
-.globl rm_int07
-.hidden rm_int07
-.type rm_int07, @function
-rm_int07:
-	pushw	$7
-	jmp	any_interrupt16
-.globl rm_int08
-.hidden rm_int08
-.type rm_int08, @function
-rm_int08:
-	pushw	$8
-	jmp	any_interrupt16
-.globl rm_int09
-.hidden rm_int09
-.type rm_int09, @function
-rm_int09:
-	pushw	$9
-	jmp	any_interrupt16
-.globl rm_int0a
-.hidden rm_int0a
-.type rm_int0a, @function
-rm_int0a:
-	pushw	$10
-	jmp	any_interrupt16
-.globl rm_int0b
-.hidden rm_int0b
-.type rm_int0b, @function
-rm_int0b:
-	pushw	$11
-	jmp	any_interrupt16
-.globl rm_int0c
-.hidden rm_int0c
-.type rm_int0c, @function
-rm_int0c:
-	pushw	$12
-	jmp	any_interrupt16
-.globl rm_int0d
-.hidden rm_int0d
-.type rm_int0d, @function
-rm_int0d:
-	pushw	$13
-	jmp	any_interrupt16
-.globl rm_int0e
-.hidden rm_int0e
-.type rm_int0e, @function
-rm_int0e:
-	pushw	$14
-	jmp	any_interrupt16
-.globl rm_int0f
-.hidden rm_int0f
-.type rm_int0f, @function
-rm_int0f:
-	pushw	$15
-	jmp	any_interrupt16
-.globl rm_int10
-.hidden rm_int10
-.type rm_int10, @function
-rm_int10:
-	pushw	$16
-	jmp	any_interrupt16
-.globl rm_int11
-.hidden rm_int11
-.type rm_int11, @function
-rm_int11:
-	pushw	$17
-	jmp	any_interrupt16
-.globl rm_int12
-.hidden rm_int12
-.type rm_int12, @function
-rm_int12:
-	pushw	$18
-	jmp	any_interrupt16
-.globl rm_int13
-.hidden rm_int13
-.type rm_int13, @function
-rm_int13:
-	pushw	$19
-	jmp	any_interrupt16
-.globl rm_int14
-.hidden rm_int14
-.type rm_int14, @function
-rm_int14:
-	pushw	$20
-	jmp	any_interrupt16
-.globl rm_int15
-.hidden rm_int15
-.type rm_int15, @function
-rm_int15:
-	pushw	$21
-	jmp	any_interrupt16
-.globl rm_int16
-.hidden rm_int16
-.type rm_int16, @function
-rm_int16:
-	pushw	$22
-	jmp	any_interrupt16
-.globl rm_int17
-.hidden rm_int17
-.type rm_int17, @function
-rm_int17:
-	pushw	$23
-	jmp	any_interrupt16
-.globl rm_int18
-.hidden rm_int18
-.type rm_int18, @function
-rm_int18:
-	pushw	$24
-	jmp	any_interrupt16
-.globl rm_int19
-.hidden rm_int19
-.type rm_int19, @function
-rm_int19:
-	pushw	$25
-	jmp	any_interrupt16
-.globl rm_int1a
-.hidden rm_int1a
-.type rm_int1a, @function
-rm_int1a:
-	pushw	$26
-	jmp	any_interrupt16
-.globl rm_int1b
-.hidden rm_int1b
-.type rm_int1b, @function
-rm_int1b:
-	pushw	$27
-	jmp	any_interrupt16
-.globl rm_int1c
-.hidden rm_int1c
-.type rm_int1c, @function
-rm_int1c:
-	pushw	$28
-	jmp	any_interrupt16
-.globl rm_int1d
-.hidden rm_int1d
-.type rm_int1d, @function
-rm_int1d:
-	pushw	$29
-	jmp	any_interrupt16
-.globl rm_int1e
-.hidden rm_int1e
-.type rm_int1e, @function
-rm_int1e:
-	pushw	$30
-	jmp	any_interrupt16
-.globl rm_int1f
-.hidden rm_int1f
-.type rm_int1f, @function
-rm_int1f:
-	pushw	$31
-	jmp	any_interrupt16
-.globl rm_def_int
-.hidden rm_def_int
-.type rm_def_int, @function
-rm_def_int:
-	iret
-
-	/*
-	 * All interrupt jumptable entries jump to here after pushing the
-	 * interrupt vector number onto the stack.
-	 */
-any_interrupt16:
-	MAKE_BIOS_STACK
-
-gs	movw	OFFS_VECTOR(%bp), %ax
-	cmpw	$0x10, %ax
-	je	Lint_10h
-	cmpw	$0x11, %ax
-	je	Lint_11h
-	cmpw	$0x12, %ax
-	je	Lint_12h
-	cmpw	$0x13, %ax
-	je	Lint_13h
-	cmpw	$0x15, %ax
-	je	Lint_15h
-	cmpw	$0x16, %ax
-	je	Lint_16h
-	cmpw	$0x1a, %ax
-	je	Lint_1ah
-	movw	$0xffff, %ax
-	jmp	Lout
-Lint_10h:
-	/* VGA BIOS services */
-	call	bios_10h
-	jmp	Lout
-Lint_11h:
-	call	bios_11h
-	jmp	Lout
-Lint_12h:
-	call	bios_12h
-	jmp	Lout
-Lint_13h:
-	/* BIOS disk services */
-	call	bios_13h
-	jmp	Lout
-Lint_15h:
-	/* Misc. BIOS services */
-	call	bios_15h
-	jmp	Lout
-Lint_16h:
-	/* keyboard services */
-	call	bios_16h
-	jmp	Lout
-Lint_1ah:
-	/* PCI bios */
-	call	bios_1ah
-	jmp	Lout
-Lout:
-	cmpw	$0, %ax
-	je	Lhandeled
-
-	/*
-	 * Insert code for unhandeled INTs here.
-	 *
-	 * ROLO prints a message to the console we could do that but then
-	 * we're in 16bit mode so we'll have to get back into 32bit mode
-	 * to use the console I/O routines (if we do this we should make
-	 * int 0x10 and int 0x16 work as well)
-	 */
-Lhandeled:
-	RESTORE_CALLERS_STACK
-
-	/* dump vector number */
-	addw	$2,%sp
-
-	/* return from interrupt */
-	iret
-
-/*
- ************************************************************
- * BIOS	interrupt 10h -- VGA services
- ************************************************************
- */
-bios_10h:
-gs	movw	OFFS_AX(%bp), %ax
-	shrw	$8, %ax
-	cmpw	$0x3, %ax
-	je	Lcur_pos
-	cmpw	$0xf, %ax
-	je	Lvid_state
-	cmpw	$0x12, %ax
-	je	Lvid_cfg
-	movw	$0xffff, %ax
-	ret
-Lcur_pos:
-	/* Read Cursor Position and Size */
-gs	movw	$0, OFFS_CX(%bp)
-gs	movw	$0, OFFS_DX(%bp)
-	xorw	%ax, %ax
-	ret
-Lvid_state:
-	/* Get Video State - 80 columns, 80x25, 16 colors */
-gs	movw	$(80 << 8|0x03), OFFS_AX(%bp)
-gs	movw	$0, OFFS_BX(%bp)
-	xorw	%ax, %ax
-	ret
-Lvid_cfg:
-	/* Video Subsystem Configuration (EGA/VGA) - indicate CGA/MDA/HGA */
-gs	movw	$0x10, OFFS_BX(%bp)
-	xorw	%ax, %ax
-	ret
-
-/*
- ************************************************************
- * BIOS interrupt 11h -- Equipment determination
- ************************************************************
- */
-
-bios_11h:
-cs	movw	bios_equipment, %ax
-gs	movw	%ax, OFFS_AX(%bp)
-	xorw	%ax, %ax
-	ret
-
-/*
- ************************************************************
- * BIOS	interrupt 12h -- Get Memory Size
- ************************************************************
- */
-bios_12h:
-cs	movw	ram_in_64kb_chunks, %ax
-	cmpw	$0xa, %ax
-	ja	b12_more_than_640k
-	shlw	$6, %ax
-	jmp	b12_return
-b12_more_than_640k:
-	movw	$0x280, %ax
-b12_return:
-	/* return number of kilobytes in ax */
-gs	movw	%ax, OFFS_AX(%bp)
-
-gs	movw	OFFS_FLAGS(%bp), %ax
-
-	/* clear carry -- function succeeded */
-	andw	$0xfffe, %ax
-gs	movw	%ax, OFFS_FLAGS(%bp)
-
-	xorw	%ax, %ax
-	ret
-
-/*
- ************************************************************
- * BIOS interrupt 13h -- Disk services
- ************************************************************
- */
-bios_13h:
-gs	movw	OFFS_AX(%bp), %ax
-	shrw	$8, %ax
-	cmpw	$0x15, %ax
-	je	Lfunc_15h
-	movw	$0xffff, %ax
-	ret
-Lfunc_15h:
-gs	movw	OFFS_AX(%bp), %ax
-
-	/* return AH=0->drive not present */
-	andw	$0x00ff, %ax
-gs	movw	%ax, OFFS_AX(%bp)
-	xorw	%ax, %ax
-	ret
-
-/*
- ***********************************************************
- * BIOS interrupt 15h -- Miscellaneous services
- ***********************************************************
- */
-bios_15h:
-gs	movw	OFFS_AX(%bp), %ax
-	shrw	$8, %ax
-	cmpw	$0xc0, %ax
-	je	Lfunc_c0h
-	cmpw	$0xe8, %ax
-	je	Lfunc_e8h
-	cmpw	$0x88, %ax
-	je	Lfunc_88h
-	movw	$0xffff, %ax
-	ret
-
-Lfunc_c0h:
-	/* Return System Configuration Parameters (PS2 only) */
-gs	movw	OFFS_FLAGS(%bp), %ax
-
-	/* return carry -- function not supported */
-	orw	$1, %ax
-gs	movw	%ax, OFFS_FLAGS(%bp)
-	xorw	%ax, %ax
-	ret
-
-Lfunc_e8h:
-gs	movw	OFFS_AX(%bp), %ax
-	andw	$0xff, %ax
-	cmpw	$1, %ax
-	je	Lfunc_e801h
-gs	movw	OFFS_FLAGS(%bp), %ax
-
-	/* return carry -- function not supported */
-	orw	$1, %ax
-gs	movw	%ax, OFFS_FLAGS(%bp)
-	xorw	%ax, %ax
-	ret
-
-Lfunc_e801h:
-	/* Get memory size for >64M Configurations */
-cs	movw	ram_in_64kb_chunks, %ax
-	cmpw	$0x100, %ax
-	ja	e801_more_than_16mb
-
-	/* multiply by 64 */
-	shlw	$6, %ax
-
-	/* 1st meg does not count */
-	subw	$0x400, %ax
-
-	/* return memory size between 1M and 16M in 1kb chunks in AX and CX */
-gs	movw	%ax, OFFS_AX(%bp)
-gs	movw	%ax, OFFS_CX(%bp)
-
-	/* set BX and DX to 0*/
-gs	movw	$0, OFFS_BX(%bp)
-gs	movw	$0, OFFS_DX(%bp)
-gs	movw	OFFS_FLAGS(%bp), %ax
-
-	/* clear carry -- function succeeded */
-	andw	$0xfffe, %ax
-gs	movw	%ax, OFFS_FLAGS(%bp)
-	xorw	%ax, %ax
-	ret
-
-e801_more_than_16mb:
-	/* subtract 16MB */
-	subw	$0x100, %ax
-
-	/* return 0x3c00 (16MB-1MB) in AX and CX */
-gs	movw	$0x3c00, OFFS_AX(%bp)
-gs	movw	$0x3c00, OFFS_CX(%bp)
-
-	/* set BX and DX to number of 64kb chunks above 16MB */
-gs	movw	%ax, OFFS_BX(%bp)
-gs	movw	%ax, OFFS_DX(%bp)
-
-gs	movw	OFFS_FLAGS(%bp), %ax
-
-	/* clear carry -- function succeeded */
-	andw	$0xfffe, %ax
-gs	movw	%ax, OFFS_FLAGS(%bp)
-	xorw	%ax, %ax
-	ret
-
-Lfunc_88h:
-cs	movw	ram_in_64kb_chunks, %ax
-	cmpw	$0x100, %ax
-	jna	b88_not_more_than16
-	movw	$0x100, %ax
-b88_not_more_than16:
-	shlw	$6, %ax
-
-	/* 1st meg does not count */
-	subw	$0x400, %ax
-
-	/* return number of kilobytes between 16MB and 16MB in ax */
-gs	movw	%ax, OFFS_AX(%bp)
-
-gs	movw	OFFS_FLAGS(%bp), %ax
-
-	/* clear carry -- function succeeded */
-	andw	$0xfffe, %ax
-gs	movw	%ax, OFFS_FLAGS(%bp)
-
-	xorw	%ax, %ax
-	ret
-
-/*
- ************************************************************
- * BIOS interrupt 16h -- keyboard services
- ************************************************************
- */
-bios_16h:
-gs	movw	OFFS_AX(%bp), %ax
-	shrw	$8, %ax
-	cmpw	$0x03, %ax
-	je	Lfunc_03h
-	movw	$0xffff, %ax
-	ret
-Lfunc_03h:
-	/* do nothing -- function not supported */
-	xorw	%ax, %ax
-	ret
-
-/*
- ************************************************************
- * BIOS interrupt 1ah -- PCI bios
- ************************************************************
- */
-bios_1ah:
-gs	movw	OFFS_AX(%bp), %ax
-	cmpb	$0xb1, %ah
-	je	Lfunc_b1h
-	movw	$0xffff, %ax
-	ret
-Lfunc_b1h:
-	call	realmode_pci_bios
-
-	/* do nothing -- function not supported */
-	xorw	%ax, %ax
-	ret
-
-
-.globl ram_in_64kb_chunks
-.hidden ram_in_64kb_chunks
-.type ram_in_64kb_chunks, @function
-ram_in_64kb_chunks:
-	.word	0
-
-.globl bios_equipment
-.hidden bios_equipment
-.type bios_equipment, @function
-bios_equipment:
-	.word	0

arch/x86/lib/bios.h

@@ -145,9 +145,6 @@ extern void *rm_int1e;
 extern void *rm_int1f;
 extern void *rm_def_int;
 
-extern void *realmode_reset;
-extern void *realmode_pci_bios_call_entry;
-
 #define RELOC_16_LONG(seg, off) (*(u32 *)(seg << 4 | (u32)&off))
 #define RELOC_16_WORD(seg, off) (*(u16 *)(seg << 4 | (u32)&off))
 #define RELOC_16_BYTE(seg, off) (*(u8 *)(seg << 4 | (u32)&off))

arch/x86/lib/bios_pci.S

@@ -1,447 +0,0 @@
-/*
- * (C) Copyright 2002
- * Daniel Engström, Omicron Ceti AB, daniel@omicron.se
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-/*
- * x86 realmode assembly implementation of a PCI BIOS
- * for platforms that use one PCI hose and configuration
- * access type 1. (The common case for low-end PC's)
- */
-
-#include "bios.h"
-
-#define PCI_BIOS_DEBUG
-
-.section .bios, "ax"
-.code16
-.globl realmode_pci_bios_call_entry
-.hidden realmode_pci_bios_call_entry
-.type realmode_pci_bios_call_entry, @function
-realmode_pci_bios_call_entry:
-	MAKE_BIOS_STACK
-	call realmode_pci_bios
-	RESTORE_CALLERS_STACK
-	ret
-
-
-.globl realmode_pci_bios
-realmode_pci_bios:
-gs	movw	OFFS_AX(%bp), %ax
-	cmpb	$1, %al
-	je	pci_bios_present
-	cmpb	$2, %al
-	je	pci_bios_find_device
-	cmpb	$3, %al
-	je	pci_bios_find_class
-	cmpb	$6, %al
-	je	pci_bios_generate_special_cycle
-	cmpb	$8, %al
-	je	pci_bios_read_cfg_byte
-	cmpb	$9, %al
-	je	pci_bios_read_cfg_word
-	cmpb	$10, %al
-	je	pci_bios_read_cfg_dword
-	cmpb	$11, %al
-	je	pci_bios_write_cfg_byte
-	cmpb	$12, %al
-	je	pci_bios_write_cfg_word
-	cmpb	$13, %al
-	je	pci_bios_write_cfg_dword
-	cmpb	$14, %al
-	je	pci_bios_get_irq_routing
-	cmpb	$15, %al
-	je	pci_bios_set_irq
-	jmp	unknown_function
-
-/*****************************************************************************/
-
-pci_bios_present:
-#ifdef PCI_BIOS_DEBUG
-cs	incl	num_pci_bios_present
-#endif
-	movl	$0x20494350, %eax
-gs	movl	%eax, OFFS_EDX(%bp)
-
-	/* We support cfg type 1 version 2.10 */
-	movb	$0x01, %al
-gs	movb	%al, OFFS_AL(%bp)
-	movw	$0x0210, %ax
-gs	movw	%ax, OFFS_BX(%bp)
-
-	/* last bus number */
-cs	movb	pci_last_bus, %al
-gs	movb	%al, OFFS_CL(%bp)
-	jmp	clear_carry
-
-/*****************************************************************************/
-
-/* device 0-31, function 0-7 */
-pci_bios_find_device:
-#ifdef PCI_BIOS_DEBUG
-cs	incl	num_pci_bios_find_device
-#endif
-gs	movw	OFFS_CX(%bp), %di
-	shll	$16, %edi
-gs	movw	OFFS_DX(%bp), %di
-	/* edi now holds device in upper 16 bits and vendor in lower 16 bits */
-
-gs	movw	OFFS_SI(%bp), %si
-
-	/* start at bus 0 dev 0 function 0 */
-	xorw	%bx, %bx
-pfd_loop:
-	/* dword 0 is vendor/device */
-	xorw	%ax, %ax
-	call	__pci_bios_select_register
-	movw	$0xcfc, %dx
-	inl	%dx, %eax
-
-	/* our device ? */
-	cmpl	%edi, %eax
-	je	pfd_found_one
-pfd_next_dev:
-	/* check for multi function devices */
-	movw	%bx, %ax
-	andw	$3, %ax
-	jnz	pfd_function_not_zero
-	movw	$0x000c, %ax
-	call	__pci_bios_select_register
-	movw	$0xcfe, %dx
-	inb	%dx, %al
-	andb	$0x80, %al
-	jz	pfd_not_multi_function
-pfd_function_not_zero:
-	/* next function, overflows in to device number, then bus number */
-	incw	%bx
-	jmp	pfd_check_bus
-
-pfd_not_multi_function:
-	/* remove function bits */
-	andw	$0xfff8, %bx
-
-	/* next device, overflows in to bus number */
-	addw	$0x0008, %bx
-pfd_check_bus:
-cs	movb	pci_last_bus, %ah
-	cmpb	%ah, %bh
-	ja	pfd_not_found
-	jmp	pfd_loop
-pfd_found_one:
-	decw	%si
-	js	pfd_done
-	jmp	pfd_next_dev
-
-pfd_done:
-gs	movw	%bx, OFFS_BX(%bp)
-	jmp	clear_carry
-
-pfd_not_found:
-	/* device not found */
-	movb	$0x86, %ah
-	jmp	set_carry
-
-/*****************************************************************************/
-
-pci_bios_find_class:
-#ifdef PCI_BIOS_DEBUG
-cs	incl	num_pci_bios_find_class
-#endif
-gs	movl	OFFS_ECX(%bp), %edi
-
-	/* edi now holds class-code in lower 24 bits */
-	andl	$0x00ffffff, %edi
-gs	movw	OFFS_SI(%bp), %si
-
-	/* start at bus 0 dev 0 function 0 */
-	xorw	%bx, %bx
-pfc_loop:
-	/* dword 8 is class-code high 24bits */
-	movw	$8, %ax
-	call	__pci_bios_select_register
-	movw	$0xcfc, %dx
-	inl	%dx, %eax
-	shrl	$8, %eax
-	andl	$0x00ffffff, %eax
-
-	/* our device ? */
-	cmpl	%edi, %eax
-	je	pfc_found_one
-pfc_next_dev:
-	/* check for multi function devices */
-	andw	$3, %bx
-	jnz	pfc_function_not_zero
-	movw	$0x000c, %ax
-	call	__pci_bios_select_register
-	movw	$0xcfe, %dx
-	inb	%dx, %al
-	andb	$0x80, %al
-	jz	pfc_not_multi_function
-pfc_function_not_zero:
-	/* next function, overflows in to device number, then bus number */
-	incw	%bx
-	jmp	pfc_check_bus
-
-pfc_not_multi_function:
-	/* remove function bits */
-	andw	$0xfff8, %bx
-
-	/* next device, overflows in to bus number */
-	addw	$0x0008, %bx
-pfc_check_bus:
-cs	movb	pci_last_bus, %ah
-	cmpb	%ah, %bh
-	ja	pfc_not_found
-	jmp	pfc_loop
-pfc_found_one:
-	decw	%si
-	js	pfc_done
-	jmp	pfc_next_dev
-
-pfc_done:
-gs	movw	%bx, OFFS_BX(%bp)
-	jmp	clear_carry
-
-pfc_not_found:
-	/* device not found */
-	movb	$0x86, %ah
-	jmp	set_carry
-
-/*****************************************************************************/
-
-pci_bios_generate_special_cycle:
-#ifdef PCI_BIOS_DEBUG
-cs	incl	num_pci_bios_generate_special_cycle
-#endif
-	/* function not supported */
-	movb	$0x81, %ah
-	jmp	set_carry
-
-/*****************************************************************************/
-
-pci_bios_read_cfg_byte:
-#ifdef PCI_BIOS_DEBUG
-cs	incl	num_pci_bios_read_cfg_byte
-#endif
-	call	pci_bios_select_register
-gs	movw	OFFS_DI(%bp), %dx
-	andw	$3, %dx
-	addw	$0xcfc, %dx
-	inb	%dx, %al
-gs	movb	%al, OFFS_CL(%bp)
-	jmp	clear_carry
-
-/*****************************************************************************/
-
-pci_bios_read_cfg_word:
-#ifdef PCI_BIOS_DEBUG
-cs	incl	num_pci_bios_read_cfg_word
-#endif
-	call	pci_bios_select_register
-gs	movw	OFFS_DI(%bp), %dx
-	andw	$2, %dx
-	addw	$0xcfc, %dx
-	inw	%dx, %ax
-gs	movw	%ax, OFFS_CX(%bp)
-	jmp	clear_carry
-
-
-/*****************************************************************************/
-
-pci_bios_read_cfg_dword:
-#ifdef PCI_BIOS_DEBUG
-cs	incl	num_pci_bios_read_cfg_dword
-#endif
-	call	pci_bios_select_register
-	movw	$0xcfc, %dx
-	inl	%dx, %eax
-gs	movl	%eax, OFFS_ECX(%bp)
-	jmp	clear_carry
-
-/*****************************************************************************/
-
-pci_bios_write_cfg_byte:
-#ifdef PCI_BIOS_DEBUG
-cs	incl	num_pci_bios_write_cfg_byte
-#endif
-	call	pci_bios_select_register
-gs	movw	OFFS_DI(%bp), %dx
-gs	movb	OFFS_CL(%bp), %al
-	andw	$3, %dx
-	addw	$0xcfc, %dx
-	outb	%al, %dx
-	jmp	clear_carry
-
-/*****************************************************************************/
-
-pci_bios_write_cfg_word:
-#ifdef PCI_BIOS_DEBUG
-cs	incl	num_pci_bios_write_cfg_word
-#endif
-	call	pci_bios_select_register
-gs	movw	OFFS_DI(%bp), %dx
-gs	movw	OFFS_CX(%bp), %ax
-	andw	$2, %dx
-	addw	$0xcfc, %dx
-	outw	%ax, %dx
-	jmp	clear_carry
-
-/*****************************************************************************/
-
-pci_bios_write_cfg_dword:
-#ifdef PCI_BIOS_DEBUG
-cs	incl	num_pci_bios_write_cfg_dword
-#endif
-	call	pci_bios_select_register
-gs	movl	OFFS_ECX(%bp), %eax
-	movw	$0xcfc, %dx
-	outl	%eax, %dx
-	jmp	clear_carry
-
-/*****************************************************************************/
-
-pci_bios_get_irq_routing:
-#ifdef PCI_BIOS_DEBUG
-cs	incl	num_pci_bios_get_irq_routing
-#endif
-	/* function not supported */
-	movb	$0x81, %ah
-	jmp	set_carry
-
-/*****************************************************************************/
-
-pci_bios_set_irq:
-#ifdef PCI_BIOS_DEBUG
-cs	incl	num_pci_bios_set_irq
-#endif
-	/* function not supported */
-	movb	$0x81, %ah
-	jmp	set_carry
-
-/*****************************************************************************/
-
-unknown_function:
-#ifdef PCI_BIOS_DEBUG
-cs	incl	num_pci_bios_unknown_function
-#endif
-	/* function not supported */
-	movb	$0x81, %ah
-	jmp	set_carry
-
-/*****************************************************************************/
-
-pci_bios_select_register:
-gs	movw	OFFS_BX(%bp), %bx
-gs	movw	OFFS_DI(%bp), %ax
-/* destroys eax, dx */
-__pci_bios_select_register:
-	/* BX holds device id, AX holds register index */
-	pushl	%ebx
-	andl	$0xfc, %eax
-	andl	$0xffff, %ebx
-	shll	$8, %ebx
-	orl	%ebx, %eax
-	orl	$0x80000000, %eax
-	movw	$0xcf8, %dx
-	outl	%eax, %dx
-	popl	%ebx
-	ret
-
-
-clear_carry:
-gs	movw	OFFS_FLAGS(%bp), %ax
-
-	/* clear carry -- function succeeded */
-	andw	$0xfffe, %ax
-gs	movw	%ax, OFFS_FLAGS(%bp)
-	xorw	%ax, %ax
-gs	movb	%ah, OFFS_AH(%bp)
-	ret
-
-set_carry:
-gs	movb	%ah, OFFS_AH(%bp)
-gs	movw	OFFS_FLAGS(%bp), %ax
-
-	/* return carry -- function not supported */
-	orw	$1, %ax
-gs	movw	%ax, OFFS_FLAGS(%bp)
-	movw	$-1, %ax
-	ret
-
-/*****************************************************************************/
-
-.globl pci_last_bus
-pci_last_bus:
-	.byte	0
-
-#ifdef PCI_BIOS_DEBUG
-.globl num_pci_bios_present
-num_pci_bios_present:
-	.long	0
-
-.globl num_pci_bios_find_device
-num_pci_bios_find_device:
-	.long	0
-
-.globl num_pci_bios_find_class
-num_pci_bios_find_class:
-	.long	0
-
-.globl num_pci_bios_generate_special_cycle
-num_pci_bios_generate_special_cycle:
-	.long 0
-
-.globl num_pci_bios_read_cfg_byte
-num_pci_bios_read_cfg_byte:
-	.long	0
-
-.globl num_pci_bios_read_cfg_word
-num_pci_bios_read_cfg_word:
-	.long	0
-
-.globl num_pci_bios_read_cfg_dword
-num_pci_bios_read_cfg_dword:
-	.long	0
-
-.globl num_pci_bios_write_cfg_byte
-num_pci_bios_write_cfg_byte:
-	.long	0
-
-.globl num_pci_bios_write_cfg_word
-num_pci_bios_write_cfg_word:
-	.long	0
-
-.globl num_pci_bios_write_cfg_dword
-num_pci_bios_write_cfg_dword:
-	.long	0
-
-.globl num_pci_bios_get_irq_routing
-num_pci_bios_get_irq_routing:
-	.long	0
-
-.globl num_pci_bios_set_irq
-num_pci_bios_set_irq:
-	.long	0
-
-.globl num_pci_bios_unknown_function
-num_pci_bios_unknown_function:
-	.long	0
-#endif

arch/x86/lib/bios_setup.c

@@ -1,179 +0,0 @@
-/*
- * (C) Copyright 2002
- * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-/*
- * Partly based on msbios.c from rolo 1.6:
- *----------------------------------------------------------------------
- * (C) Copyright 2000
- * Sysgo Real-Time Solutions GmbH
- * Klein-Winternheim, Germany
- *----------------------------------------------------------------------
- */
-
-#include <common.h>
-#include <pci.h>
-#include <asm/realmode.h>
-#include <asm/io.h>
-#include "bios.h"
-
-DECLARE_GLOBAL_DATA_PTR;
-
-#define NUMVECTS	256
-
-static int set_jmp_vector(int entry_point, void *target)
-{
-	if (entry_point & ~0xffff)
-		return -1;
-
-	if (((u32)target - 0xf0000) & ~0xffff)
-		return -1;
-
-	printf("set_jmp_vector: 0xf000:%04x -> %p\n",
-			entry_point, target);
-
-	/* jmp opcode */
-	writeb(0xea, 0xf0000 + entry_point);
-
-	/* offset */
-	writew(((u32)target-0xf0000), 0xf0000 + entry_point + 1);
-
-	/* segment */
-	writew(0xf000, 0xf0000 + entry_point + 3);
-
-	return 0;
-}
-
-/* Install an interrupt vector */
-static void setvector(int vector, u16 segment, void *handler)
-{
-	u16 *ptr = (u16 *)(vector * 4);
-	ptr[0] = ((u32)handler - (segment << 4)) & 0xffff;
-	ptr[1] = segment;
-
-#if 0
-	printf("setvector: int%02x -> %04x:%04x\n",
-			vector, ptr[1], ptr[0]);
-#endif
-}
-
-int bios_setup(void)
-{
-	/* The BIOS section is not relocated and still in the ROM. */
-	ulong bios_start = (ulong)&__bios_start;
-	ulong bios_size = (ulong)&__bios_size;
-
-	static int done;
-	int vector;
-#ifdef CONFIG_PCI
-	struct pci_controller *pri_hose;
-#endif
-	if (done)
-		return 0;
-
-	done = 1;
-
-	if (bios_size > 65536) {
-		printf("BIOS too large (%ld bytes, max is 65536)\n",
-				bios_size);
-		return -1;
-	}
-
-	memcpy(BIOS_BASE, (void *)bios_start, bios_size);
-
-	/* clear bda */
-	memset(BIOS_DATA, 0, BIOS_DATA_SIZE);
-
-	/* enter some values to the bda */
-	writew(0x3f8, BIOS_DATA);   /* com1 addr */
-	writew(0x2f8, BIOS_DATA+2); /* com2 addr */
-	writew(0x3e8, BIOS_DATA+4); /* com3 addr */
-	writew(0x2e8, BIOS_DATA+6); /* com4 addr */
-	writew(0x278, BIOS_DATA+8); /* lpt1 addr */
-	/*
-	 * The kernel wants to read the base memory size
-	 * from 40:13. Put a zero there to avoid an error message
-	 */
-	writew(0, BIOS_DATA+0x13);  /* base memory size */
-
-
-	/* setup realmode interrupt vectors */
-	for (vector = 0; vector < NUMVECTS; vector++)
-		setvector(vector, BIOS_CS, &rm_def_int);
-
-	setvector(0x00, BIOS_CS, &rm_int00);
-	setvector(0x01, BIOS_CS, &rm_int01);
-	setvector(0x02, BIOS_CS, &rm_int02);
-	setvector(0x03, BIOS_CS, &rm_int03);
-	setvector(0x04, BIOS_CS, &rm_int04);
-	setvector(0x05, BIOS_CS, &rm_int05);
-	setvector(0x06, BIOS_CS, &rm_int06);
-	setvector(0x07, BIOS_CS, &rm_int07);
-	setvector(0x08, BIOS_CS, &rm_int08);
-	setvector(0x09, BIOS_CS, &rm_int09);
-	setvector(0x0a, BIOS_CS, &rm_int0a);
-	setvector(0x0b, BIOS_CS, &rm_int0b);
-	setvector(0x0c, BIOS_CS, &rm_int0c);
-	setvector(0x0d, BIOS_CS, &rm_int0d);
-	setvector(0x0e, BIOS_CS, &rm_int0e);
-	setvector(0x0f, BIOS_CS, &rm_int0f);
-	setvector(0x10, BIOS_CS, &rm_int10);
-	setvector(0x11, BIOS_CS, &rm_int11);
-	setvector(0x12, BIOS_CS, &rm_int12);
-	setvector(0x13, BIOS_CS, &rm_int13);
-	setvector(0x14, BIOS_CS, &rm_int14);
-	setvector(0x15, BIOS_CS, &rm_int15);
-	setvector(0x16, BIOS_CS, &rm_int16);
-	setvector(0x17, BIOS_CS, &rm_int17);
-	setvector(0x18, BIOS_CS, &rm_int18);
-	setvector(0x19, BIOS_CS, &rm_int19);
-	setvector(0x1a, BIOS_CS, &rm_int1a);
-	setvector(0x1b, BIOS_CS, &rm_int1b);
-	setvector(0x1c, BIOS_CS, &rm_int1c);
-	setvector(0x1d, BIOS_CS, &rm_int1d);
-	setvector(0x1e, BIOS_CS, &rm_int1e);
-	setvector(0x1f, BIOS_CS, &rm_int1f);
-
-	set_jmp_vector(0xfff0, &realmode_reset);
-	set_jmp_vector(0xfe6e, &realmode_pci_bios_call_entry);
-
-	/* fill in data area */
-	RELOC_16_WORD(0xf000, ram_in_64kb_chunks) = gd->ram_size >> 16;
-	RELOC_16_WORD(0xf000, bios_equipment) = 0; /* FixMe */
-
-	/* If we assume only one PCI hose, this PCI hose
-	 * will own PCI bus #0, and the last PCI bus of
-	 * that PCI hose will be the last PCI bus in the
-	 * system.
-	 * (This, ofcause break on multi hose systems,
-	 *  but our PCI BIOS only support one hose anyway)
-	 */
-#ifdef CONFIG_PCI
-	pri_hose = pci_bus_to_hose(0);
-	if (NULL != pri_hose) {
-		/* fill in last pci bus number for use by the realmode
-		 * PCI BIOS */
-		RELOC_16_BYTE(0xf000, pci_last_bus) = pri_hose->last_busno;
-	}
-#endif
-	return 0;
-}

arch/x86/lib/realmode.c

@@ -1,93 +0,0 @@
-/*
- * (C) Copyright 2002
- * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <common.h>
-#include <asm/io.h>
-#include <asm/ptrace.h>
-#include <asm/realmode.h>
-
-#define REALMODE_MAILBOX ((char *)0xe00)
-
-int realmode_setup(void)
-{
-	/* The realmode section is not relocated and still in the ROM. */
-	ulong realmode_start = (ulong)&__realmode_start;
-	ulong realmode_size = (ulong)&__realmode_size;
-
-	/* copy the realmode switch code */
-	if (realmode_size > (REALMODE_MAILBOX - (char *)REALMODE_BASE)) {
-		printf("realmode switch too large (%ld bytes, max is %d)\n",
-		       realmode_size,
-		       (int)(REALMODE_MAILBOX - (char *)REALMODE_BASE));
-		return -1;
-	}
-
-	memcpy((char *)REALMODE_BASE, (void *)realmode_start, realmode_size);
-	asm("wbinvd\n");
-
-	return 0;
-}
-
-int enter_realmode(u16 seg, u16 off, struct pt_regs *in, struct pt_regs *out)
-{
-
-	/* setup out thin bios emulation */
-	if (bios_setup())
-		return -1;
-
-	if (realmode_setup())
-		return -1;
-
-	in->eip = off;
-	in->xcs = seg;
-	if ((in->esp & 0xffff) < 4)
-		printf("Warning: entering realmode with sp < 4 will fail\n");
-
-	memcpy(REALMODE_MAILBOX, in, sizeof(struct pt_regs));
-	asm("wbinvd\n");
-
-	__asm__ volatile (
-		 "lcall $0x20,%0\n" : : "i" (&realmode_enter));
-
-	asm("wbinvd\n");
-	memcpy(out, REALMODE_MAILBOX, sizeof(struct pt_regs));
-
-	return out->eax;
-}
-
-/*
- * This code is supposed to access a realmode interrupt
- * it does currently not work for me
- */
-int enter_realmode_int(u8 lvl, struct pt_regs *in, struct pt_regs *out)
-{
-	/* place two instructions at 0x700 */
-	writeb(0xcd, 0x700);  /* int $lvl */
-	writeb(lvl, 0x701);
-	writeb(0xcb, 0x702);  /* lret */
-	asm("wbinvd\n");
-
-	enter_realmode(0x00, 0x700, in, out);
-
-	return out->eflags & 0x00000001;
-}

arch/x86/lib/realmode_switch.S

@@ -1,232 +0,0 @@
-/*
- * (C) Copyright 2002
- * Daniel Engström, Omicron Ceti AB, daniel@omicron.se
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-/* 32bit -> 16bit -> 32bit mode switch code */
-
-/*
- * Stack frame at 0xe00
- *	e00 ebx;
- *	e04 ecx;
- *	e08 edx;
- *	e0c esi;
- *	e10 edi;
- *	e14 ebp;
- *	e18 eax;
- *	e1c ds;
- *	e20 es;
- *	e24 fs;
- *	e28 gs;
- *	e2c orig_eax;
- *	e30 eip;
- *	e34 cs;
- *	e38 eflags;
- *	e3c esp;
- *	e40 ss;
- */
-
-#define a32		.byte 0x67;	/* address size prefix 32 */
-#define o32		.byte 0x66;	/* operand size prefix 32 */
-
-.section .realmode, "ax"
-.code16
-
-	/* 16bit protected mode code here */
-.globl realmode_enter
-realmode_enter:
-o32	pusha
-o32	pushf
-	cli
-	sidt	saved_idt
-	sgdt	saved_gdt
-	movl	%esp, %eax
-	movl	%eax, saved_protected_mode_esp
-
-	movl	$0x10, %eax
-	movl	%eax, %esp
-	movw	$0x28, %ax
-	movw	%ax, %ds
-	movw	%ax, %es
-	movw	%ax, %fs
-	movw	%ax, %gs
-
-	lidt	realmode_idt_ptr
-	/* Go back into real mode by clearing PE to 0 */
-	movl	%cr0, %eax
-	andl	$0x7ffffffe, %eax
-	movl	%eax, %cr0
-
-	/* switch to real mode */
-	ljmp	$0x0,$do_realmode
-
-do_realmode:
-	/* realmode code from here */
-	movw	%cs,%ax
-	movw	%ax,%ds
-	movw	%ax,%es
-	movw	%ax,%fs
-	movw	%ax,%gs
-
-	/* create a temporary stack */
-	movw	$0xc0, %ax
-	movw	%ax, %ss
-	movw	$0x200, %ax
-	movw	%ax, %sp
-
-	popl	%ebx
-	popl	%ecx
-	popl	%edx
-	popl	%esi
-	popl	%edi
-	popl	%ebp
-	popl	%eax
-	movl	%eax, temp_eax
-	popl	%eax
-	movw	%ax, %ds
-	popl	%eax
-	movw	%ax, %es
-	popl	%eax
-	movw	%ax, %fs
-	popl	%eax
-	movw	%ax, %gs
-	popl	%eax				/* orig_eax */
-	popl	%eax
-cs	movw	%ax, temp_ip
-	popl	%eax
-cs	movw	%ax, temp_cs
-o32	popf
-	popl	%eax
-	popw	%ss
-	movl	%eax, %esp
-cs	movl	temp_eax, %eax
-
-	/* self-modifying code, better flush the cache */
-	wbinvd
-
-	.byte	0x9a				/* lcall */
-temp_ip:
-	.word	0				/* new ip */
-temp_cs:
-	.word	0				/* new cs */
-
-realmode_ret:
-	/* save eax, esp and ss */
-cs	movl	%eax, saved_eax
-	movl	%esp, %eax
-cs	movl	%eax, saved_esp
-	movw	%ss, %ax
-cs	movw	%ax, saved_ss
-
-	/*
-	 * restore the stack, note that we set sp to 0x244;
-	 * pt_regs is 0x44 bytes long and we push the structure
-	 * backwards on to the stack, bottom first
-	 */
-	movw	$0xc0, %ax
-	movw	%ax, %ss
-	movw	$0x244, %ax
-	movw	%ax, %sp
-
-	xorl	%eax,%eax
-cs	movw	saved_ss, %ax
-	pushl	%eax
-cs	movl	saved_esp, %eax
-	pushl	%eax
-o32	pushf
-	xorl	%eax,%eax
-cs	movw	temp_cs, %ax
-	pushl	%eax
-cs	movw	temp_ip, %ax
-	pushl	%eax
-	pushl	$0
-	movw	%gs, %ax
-	pushl	%eax
-	movw	%fs, %ax
-	pushl	%eax
-	movw	%es, %ax
-	pushl	%eax
-	movw	%ds, %ax
-	pushl	%eax
-	movl	saved_eax, %eax
-	pushl	%eax
-	pushl	%ebp
-	pushl	%edi
-	pushl	%esi
-	pushl	%edx
-	pushl	%ecx
-	pushl	%ebx
-
-o32 cs	lidt	saved_idt
-o32 cs	lgdt	saved_gdt
-
-	/* Go back into protected mode reset PE to 1 */
-	movl	%cr0, %eax
-	orl	$1,%eax
-	movl	%eax, %cr0
-
-	/* flush prefetch queue */
-	jmp	next_line
-next_line:
-	movw	$return_ptr, %ax
-	movw	%ax,%bp
-o32 cs	ljmp	*(%bp)
-
-.code32
-protected_mode:
-	/* Reload segment registers */
-	movl	$0x18, %eax
-	movw	%ax, %fs
-	movw	%ax, %ds
-	movw	%ax, %gs
-	movw	%ax, %es
-	movw	%ax, %ss
-	movl	saved_protected_mode_esp, %eax
-	movl	%eax, %esp
-	popf
-	popa
-	ret
-
-temp_eax:
-	.long	0
-
-saved_ss:
-	.word	0
-saved_esp:
-	.long	0
-saved_eax:
-	.long	0
-
-realmode_idt_ptr:
-	.word	0x400
-	.word	0x0, 0x0
-
-saved_gdt:
-	.word	0, 0, 0, 0
-saved_idt:
-	.word	0, 0, 0, 0
-
-saved_protected_mode_esp:
-	.long	0
-
-return_ptr:
-	.long	protected_mode
-	.word	0x10

arch/x86/lib/video.c

@@ -26,7 +26,6 @@
 #include <stdio_dev.h>
 #include <i8042.h>
 #include <asm/ptrace.h>
-#include <asm/realmode.h>
 #include <asm/io.h>
 #include <asm/pci.h>
 
@@ -222,10 +221,5 @@ int video_init(void)
 
 int drv_video_init(void)
 {
-#ifndef CONFIG_X86_NO_REAL_MODE
-	if (video_bios_init())
-		return 1;
-#endif
-
 	return video_init();
 }

arch/x86/lib/video_bios.c

@@ -1,196 +0,0 @@
-/*
- * (C) Copyright 2002
- * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <common.h>
-#include <pci.h>
-#include <malloc.h>
-#include <asm/ptrace.h>
-#include <asm/realmode.h>
-#include <asm/io.h>
-#include <asm/pci.h>
-#include "bios.h"
-
-#undef PCI_BIOS_DEBUG
-#undef VGA_BIOS_DEBUG
-
-#ifdef	VGA_BIOS_DEBUG
-#define	PRINTF(fmt, args...)	printf(fmt, ##args)
-#else
-#define PRINTF(fmt, args...)
-#endif
-
-#define PCI_CLASS_VIDEO			3
-#define PCI_CLASS_VIDEO_STD		0
-#define PCI_CLASS_VIDEO_PROG_IF_VGA	0
-
-DEFINE_PCI_DEVICE_TABLE(supported) = {
-	{PCI_VIDEO_VENDOR_ID, PCI_VIDEO_DEVICE_ID},
-	{}
-};
-
-static u32 probe_pci_video(void)
-{
-	struct pci_controller *hose;
-	pci_dev_t devbusfn = pci_find_devices(supported, 0);
-
-	if ((devbusfn != -1)) {
-		u32 old;
-		u32 addr;
-
-		/* PCI video device detected */
-		printf("Found PCI VGA device at %02x.%02x.%x\n",
-		       PCI_BUS(devbusfn),
-		       PCI_DEV(devbusfn),
-		       PCI_FUNC(devbusfn));
-
-		/* Enable I/O decoding as well, PCI viudeo boards
-		 * support I/O accesses, but they provide no
-		 * bar register for this since the ports are fixed.
-		 */
-		pci_write_config_word(devbusfn,
-				      PCI_COMMAND,
-				      PCI_COMMAND_MEMORY |
-				      PCI_COMMAND_IO |
-				      PCI_COMMAND_MASTER);
-
-		/* Test the ROM decoder, do the device support a rom? */
-		pci_read_config_dword(devbusfn, PCI_ROM_ADDRESS, &old);
-		pci_write_config_dword(devbusfn, PCI_ROM_ADDRESS,
-				       (u32)PCI_ROM_ADDRESS_MASK);
-		pci_read_config_dword(devbusfn, PCI_ROM_ADDRESS, &addr);
-		pci_write_config_dword(devbusfn, PCI_ROM_ADDRESS, old);
-
-		if (!addr) {
-			printf("PCI VGA have no ROM?\n");
-			return 0;
-		}
-
-		/* device have a rom */
-		if (pci_shadow_rom(devbusfn, (void *)0xc0000)) {
-			printf("Shadowing of PCI VGA BIOS failed\n");
-			return 0;
-		}
-
-		/* Now enable lagacy VGA port access */
-		hose = pci_bus_to_hose(PCI_BUS(devbusfn));
-		if (pci_enable_legacy_video_ports(hose)) {
-			printf("PCI VGA enable failed\n");
-			return 0;
-		}
-
-
-		/* return the pci device info, that we'll need later */
-		return PCI_BUS(devbusfn) << 8 |
-			PCI_DEV(devbusfn) << 3 | (PCI_FUNC(devbusfn) & 7);
-	}
-
-	return 0;
-}
-
-static int probe_isa_video(void)
-{
-	u32 ptr;
-	char *buf;
-
-	ptr = isa_map_rom(0xc0000, 0x8000);
-
-	if (!ptr)
-		return -1;
-
-	buf = malloc(0x8000);
-	if (!buf) {
-		isa_unmap_rom(ptr);
-		return -1;
-	}
-
-	if (readw(ptr) != 0xaa55) {
-		free(buf);
-		isa_unmap_rom(ptr);
-		return -1;
-	}
-
-	/* shadow the rom */
-	memcpy(buf, (void *)ptr, 0x8000);
-	isa_unmap_rom(ptr);
-	memcpy((void *)0xc0000, buf, 0x8000);
-
-	free(buf);
-
-	return 0;
-}
-
-int video_bios_init(void)
-{
-	struct pt_regs regs;
-	int size;
-	int i;
-	u8 sum;
-
-	/* clear the video bios area in case we warmbooted */
-	memset((void *)0xc0000, 0, 0x8000);
-	memset(&regs, 0, sizeof(struct pt_regs));
-
-	if (probe_isa_video())
-		/* No ISA board found, try the PCI bus */
-		regs.eax = probe_pci_video();
-
-	/* Did we succeed in mapping any video bios */
-	if (readw(0xc0000) == 0xaa55) {
-		PRINTF("Found video bios signature\n");
-		size = readb(0xc0002) * 512;
-		PRINTF("size %d\n", size);
-		sum = 0;
-
-		for (i = 0; i < size; i++)
-			sum += readb(0xc0000 + i);
-
-		PRINTF("Checksum is %sOK\n", sum ? "NOT " : "");
-
-		if (sum)
-			return 1;
-
-		/*
-		 * Some video bioses (ATI Mach64) seem to think that
-		 * the original int 10 handler is always at
-		 * 0xf000:0xf065 , place an iret instruction there
-		 */
-		writeb(0xcf, 0xff065);
-
-		regs.esp = 0x8000;
-		regs.xss = 0x2000;
-		enter_realmode(0xc000, 3, &regs, &regs);
-
-		PRINTF("INT 0x10 vector after:  %04x:%04x\n",
-		       readw(0x42), readw(0x40));
-		PRINTF("BIOS returned %scarry\n",
-		       regs.eflags & 0x00000001 ? "" : "NOT ");
-#ifdef PCI_BIOS_DEBUG
-		print_bios_bios_stat();
-#endif
-		return regs.eflags & 0x00000001;
-
-	}
-
-	return 1;
-
-}

arch/x86/lib/zimage.c

@@ -33,7 +33,6 @@
 #include <asm/io.h>
 #include <asm/ptrace.h>
 #include <asm/zimage.h>
-#include <asm/realmode.h>
 #include <asm/byteorder.h>
 #include <asm/bootparam.h>
 #ifdef CONFIG_SYS_COREBOOT
@@ -175,16 +174,9 @@ struct boot_params *load_zimage(char *image, unsigned long kernel_size,
 	else
 		*load_address = (void *)ZIMAGE_LOAD_ADDR;
 
-#if (defined CONFIG_ZBOOT_32 || defined CONFIG_X86_NO_REAL_MODE)
 	printf("Building boot_params at 0x%8.8lx\n", (ulong)setup_base);
 	memset(setup_base, 0, sizeof(*setup_base));
 	setup_base->hdr = params->hdr;
-#else
-	/* load setup */
-	printf("Moving Real-Mode Code to 0x%8.8lx (%d bytes)\n",
-	       (ulong)setup_base, setup_size);
-	memmove(setup_base, image, setup_size);
-#endif
 
 	if (bootproto >= 0x0204)
 		kernel_size = hdr->syssize * 16;
@@ -241,10 +233,8 @@ int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot,
 	struct setup_header *hdr = &setup_base->hdr;
 	int bootproto = get_boot_protocol(hdr);
 
-#if (defined CONFIG_ZBOOT_32 || defined CONFIG_X86_NO_REAL_MODE)
 	setup_base->e820_entries = install_e820_map(
 		ARRAY_SIZE(setup_base->e820_map), setup_base->e820_map);
-#endif
 
 	if (bootproto == 0x0100) {
 		setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
@@ -300,7 +290,6 @@ void boot_zimage(void *setup_base, void *load_address)
 #ifdef CONFIG_SYS_COREBOOT
 	timestamp_add_now(TS_U_BOOT_START_KERNEL);
 #endif
-#if defined CONFIG_ZBOOT_32
 	/*
 	 * Set %ebx, %ebp, and %edi to 0, %esi to point to the boot_params
 	 * structure, and then jump to the kernel. We assume that %cs is
@@ -317,18 +306,6 @@ void boot_zimage(void *setup_base, void *load_address)
 	   "b"(0), "D"(0)
 	:  "%ebp"
 	);
-#else
-	struct pt_regs regs;
-
-	memset(&regs, 0, sizeof(struct pt_regs));
-	regs.xds = (u32)setup_base >> 4;
-	regs.xes = regs.xds;
-	regs.xss = regs.xds;
-	regs.esp = 0x9000;
-	regs.eflags = 0;
-	enter_realmode(((u32)setup_base + SETUP_START_OFFSET) >> 4, 0,
-		       &regs, &regs);
-#endif
 }
 
 void setup_pcat_compatibility(void)