mirror of
https://github.com/AsahiLinux/u-boot
synced 2025-02-17 22:49:02 +00:00
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>
This commit is contained in:
Simon Glass
parent
588a13f742
commit
96dfc0633a
12 changed files with 0 additions and 1799 deletions
5
README
5
README
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@ -3820,11 +3820,6 @@ Low Level (hardware related) configuration options:
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If defined, the x86 reset vector code is included. This is not
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needed when U-Boot is running from Coreboot.
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- CONFIG_X86_NO_REAL_MODE
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If defined, x86 real mode code is omitted. This assumes a
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32-bit environment where such code is not needed. You will
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need to do this when U-Boot is running from Coreboot.
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Freescale QE/FMAN Firmware Support:
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-----------------------------------
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@ -1,36 +0,0 @@
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/*
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* (C) Copyright 2002
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* Daniel Engström, Omicron Ceti AB, daniel@omicron.se
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef __ASM_REALMODE_H_
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#define __ASM_REALMODE_H_
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#include <asm/ptrace.h>
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extern ulong __realmode_start;
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extern ulong __realmode_size;
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extern char realmode_enter;
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int bios_setup(void);
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int enter_realmode(u16 seg, u16 off, struct pt_regs *in, struct pt_regs *out);
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int enter_realmode_int(u8 lvl, struct pt_regs *in, struct pt_regs *out);
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#endif
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@ -25,16 +25,6 @@ include $(TOPDIR)/config.mk
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LIB = $(obj)lib$(ARCH).o
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ifeq ($(CONFIG_X86_NO_REAL_MODE),)
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SOBJS-$(CONFIG_SYS_PC_BIOS) += bios.o
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SOBJS-$(CONFIG_SYS_PCI_BIOS) += bios_pci.o
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COBJS-y += realmode.o
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SOBJS-y += realmode_switch.o
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COBJS-$(CONFIG_SYS_PC_BIOS) += bios_setup.o
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COBJS-$(CONFIG_VIDEO_VGA) += video_bios.o
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endif
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COBJS-y += board.o
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COBJS-y += bootm.o
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COBJS-y += cmd_boot.o
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@ -1,569 +0,0 @@
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/*
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* (C) Copyright 2002
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* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* Based on msbios.c from rolo 1.6:
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*----------------------------------------------------------------------
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* (C) Copyright 2000
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* Sysgo Real-Time Solutions GmbH
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* Klein-Winternheim, Germany
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*----------------------------------------------------------------------
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*/
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#include "bios.h"
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/*
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* During it's initialization phase, before switching to protected
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* mode, the Linux Kernel makes a few BIOS calls. This won't work
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* if the board does not have a BIOS.
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*
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* This is a very minimalisic BIOS that supplies just enough
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* functionality to keep the Linux Kernel happy. It is NOT
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* a general purpose replacement for a real BIOS !!
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*/
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.section .bios, "ax"
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.code16
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.org 0
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/* a call to f000:0 should warmboot */
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jmp realmode_reset
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.globl rm_int00
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.hidden rm_int00
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.type rm_int00, @function
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rm_int00:
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pushw $0
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jmp any_interrupt16
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.globl rm_int01
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.hidden rm_int01
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.type rm_int01, @function
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rm_int01:
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pushw $1
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jmp any_interrupt16
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.globl rm_int02
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.hidden rm_int02
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.type rm_int02, @function
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rm_int02:
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pushw $2
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jmp any_interrupt16
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.globl rm_int03
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.hidden rm_int03
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.type rm_int03, @function
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rm_int03:
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pushw $3
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jmp any_interrupt16
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.globl rm_int04
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.hidden rm_int04
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.type rm_int04, @function
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rm_int04:
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pushw $4
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jmp any_interrupt16
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.globl rm_int05
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.hidden rm_int05
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.type rm_int05, @function
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rm_int05:
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pushw $5
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jmp any_interrupt16
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.globl rm_int06
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.hidden rm_int06
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.type rm_int06, @function
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rm_int06:
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pushw $6
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jmp any_interrupt16
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.globl rm_int07
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.hidden rm_int07
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.type rm_int07, @function
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rm_int07:
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pushw $7
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jmp any_interrupt16
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.globl rm_int08
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.hidden rm_int08
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.type rm_int08, @function
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rm_int08:
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pushw $8
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jmp any_interrupt16
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.globl rm_int09
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.hidden rm_int09
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.type rm_int09, @function
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rm_int09:
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pushw $9
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jmp any_interrupt16
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.globl rm_int0a
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.hidden rm_int0a
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.type rm_int0a, @function
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rm_int0a:
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pushw $10
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jmp any_interrupt16
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.globl rm_int0b
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.hidden rm_int0b
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.type rm_int0b, @function
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rm_int0b:
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pushw $11
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jmp any_interrupt16
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.globl rm_int0c
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.hidden rm_int0c
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.type rm_int0c, @function
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rm_int0c:
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pushw $12
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jmp any_interrupt16
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.globl rm_int0d
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.hidden rm_int0d
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.type rm_int0d, @function
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rm_int0d:
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pushw $13
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jmp any_interrupt16
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.globl rm_int0e
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.hidden rm_int0e
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.type rm_int0e, @function
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rm_int0e:
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pushw $14
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jmp any_interrupt16
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.globl rm_int0f
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.hidden rm_int0f
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.type rm_int0f, @function
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rm_int0f:
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pushw $15
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jmp any_interrupt16
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.globl rm_int10
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.hidden rm_int10
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.type rm_int10, @function
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rm_int10:
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pushw $16
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jmp any_interrupt16
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.globl rm_int11
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.hidden rm_int11
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.type rm_int11, @function
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rm_int11:
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pushw $17
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jmp any_interrupt16
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.globl rm_int12
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.hidden rm_int12
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.type rm_int12, @function
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rm_int12:
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pushw $18
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jmp any_interrupt16
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.globl rm_int13
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.hidden rm_int13
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.type rm_int13, @function
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rm_int13:
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pushw $19
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jmp any_interrupt16
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.globl rm_int14
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.hidden rm_int14
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.type rm_int14, @function
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rm_int14:
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pushw $20
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jmp any_interrupt16
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.globl rm_int15
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.hidden rm_int15
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.type rm_int15, @function
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rm_int15:
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pushw $21
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jmp any_interrupt16
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.globl rm_int16
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.hidden rm_int16
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.type rm_int16, @function
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rm_int16:
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pushw $22
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jmp any_interrupt16
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.globl rm_int17
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.hidden rm_int17
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.type rm_int17, @function
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rm_int17:
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pushw $23
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jmp any_interrupt16
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.globl rm_int18
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.hidden rm_int18
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.type rm_int18, @function
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rm_int18:
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pushw $24
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jmp any_interrupt16
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.globl rm_int19
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.hidden rm_int19
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.type rm_int19, @function
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rm_int19:
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pushw $25
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jmp any_interrupt16
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.globl rm_int1a
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.hidden rm_int1a
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.type rm_int1a, @function
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rm_int1a:
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pushw $26
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jmp any_interrupt16
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.globl rm_int1b
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.hidden rm_int1b
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.type rm_int1b, @function
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rm_int1b:
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pushw $27
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jmp any_interrupt16
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.globl rm_int1c
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.hidden rm_int1c
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.type rm_int1c, @function
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rm_int1c:
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pushw $28
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jmp any_interrupt16
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.globl rm_int1d
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.hidden rm_int1d
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.type rm_int1d, @function
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rm_int1d:
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pushw $29
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jmp any_interrupt16
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.globl rm_int1e
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.hidden rm_int1e
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.type rm_int1e, @function
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rm_int1e:
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pushw $30
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jmp any_interrupt16
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.globl rm_int1f
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.hidden rm_int1f
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.type rm_int1f, @function
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rm_int1f:
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pushw $31
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jmp any_interrupt16
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.globl rm_def_int
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.hidden rm_def_int
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.type rm_def_int, @function
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rm_def_int:
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iret
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/*
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* All interrupt jumptable entries jump to here after pushing the
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* interrupt vector number onto the stack.
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*/
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any_interrupt16:
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MAKE_BIOS_STACK
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gs movw OFFS_VECTOR(%bp), %ax
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cmpw $0x10, %ax
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je Lint_10h
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cmpw $0x11, %ax
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je Lint_11h
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cmpw $0x12, %ax
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je Lint_12h
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cmpw $0x13, %ax
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je Lint_13h
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cmpw $0x15, %ax
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je Lint_15h
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cmpw $0x16, %ax
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je Lint_16h
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cmpw $0x1a, %ax
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je Lint_1ah
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movw $0xffff, %ax
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jmp Lout
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Lint_10h:
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/* VGA BIOS services */
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call bios_10h
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jmp Lout
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Lint_11h:
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call bios_11h
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jmp Lout
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Lint_12h:
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call bios_12h
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jmp Lout
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Lint_13h:
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/* BIOS disk services */
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call bios_13h
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jmp Lout
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Lint_15h:
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/* Misc. BIOS services */
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call bios_15h
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jmp Lout
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Lint_16h:
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/* keyboard services */
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call bios_16h
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jmp Lout
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Lint_1ah:
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/* PCI bios */
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call bios_1ah
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jmp Lout
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Lout:
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cmpw $0, %ax
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je Lhandeled
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/*
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* Insert code for unhandeled INTs here.
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*
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* ROLO prints a message to the console we could do that but then
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* we're in 16bit mode so we'll have to get back into 32bit mode
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* to use the console I/O routines (if we do this we should make
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* int 0x10 and int 0x16 work as well)
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*/
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Lhandeled:
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RESTORE_CALLERS_STACK
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/* dump vector number */
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addw $2,%sp
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/* return from interrupt */
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iret
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/*
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************************************************************
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* BIOS interrupt 10h -- VGA services
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************************************************************
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*/
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bios_10h:
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gs movw OFFS_AX(%bp), %ax
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shrw $8, %ax
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cmpw $0x3, %ax
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je Lcur_pos
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cmpw $0xf, %ax
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je Lvid_state
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cmpw $0x12, %ax
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je Lvid_cfg
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movw $0xffff, %ax
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ret
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Lcur_pos:
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/* Read Cursor Position and Size */
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gs movw $0, OFFS_CX(%bp)
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gs movw $0, OFFS_DX(%bp)
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xorw %ax, %ax
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ret
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Lvid_state:
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/* Get Video State - 80 columns, 80x25, 16 colors */
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gs movw $(80 << 8|0x03), OFFS_AX(%bp)
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gs movw $0, OFFS_BX(%bp)
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xorw %ax, %ax
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ret
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Lvid_cfg:
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/* Video Subsystem Configuration (EGA/VGA) - indicate CGA/MDA/HGA */
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gs movw $0x10, OFFS_BX(%bp)
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xorw %ax, %ax
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ret
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/*
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************************************************************
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* BIOS interrupt 11h -- Equipment determination
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************************************************************
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*/
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bios_11h:
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cs movw bios_equipment, %ax
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gs movw %ax, OFFS_AX(%bp)
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xorw %ax, %ax
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ret
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/*
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************************************************************
|
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* BIOS interrupt 12h -- Get Memory Size
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************************************************************
|
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*/
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bios_12h:
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cs movw ram_in_64kb_chunks, %ax
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cmpw $0xa, %ax
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ja b12_more_than_640k
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shlw $6, %ax
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jmp b12_return
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b12_more_than_640k:
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movw $0x280, %ax
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b12_return:
|
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/* return number of kilobytes in ax */
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gs movw %ax, OFFS_AX(%bp)
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gs movw OFFS_FLAGS(%bp), %ax
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|
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/* clear carry -- function succeeded */
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andw $0xfffe, %ax
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gs movw %ax, OFFS_FLAGS(%bp)
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xorw %ax, %ax
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ret
|
||||
|
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/*
|
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************************************************************
|
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* BIOS interrupt 13h -- Disk services
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************************************************************
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*/
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bios_13h:
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gs movw OFFS_AX(%bp), %ax
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shrw $8, %ax
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cmpw $0x15, %ax
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je Lfunc_15h
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movw $0xffff, %ax
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ret
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Lfunc_15h:
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gs movw OFFS_AX(%bp), %ax
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/* return AH=0->drive not present */
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andw $0x00ff, %ax
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gs movw %ax, OFFS_AX(%bp)
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xorw %ax, %ax
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ret
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/*
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***********************************************************
|
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* BIOS interrupt 15h -- Miscellaneous services
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***********************************************************
|
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*/
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bios_15h:
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gs movw OFFS_AX(%bp), %ax
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shrw $8, %ax
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cmpw $0xc0, %ax
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je Lfunc_c0h
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cmpw $0xe8, %ax
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je Lfunc_e8h
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cmpw $0x88, %ax
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je Lfunc_88h
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movw $0xffff, %ax
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ret
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|
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Lfunc_c0h:
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/* Return System Configuration Parameters (PS2 only) */
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gs movw OFFS_FLAGS(%bp), %ax
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|
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/* return carry -- function not supported */
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orw $1, %ax
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gs movw %ax, OFFS_FLAGS(%bp)
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xorw %ax, %ax
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ret
|
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|
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Lfunc_e8h:
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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
|
||||
|
|
@ -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))
|
||||
|
|
|
|||
|
|
@ -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
|
||||
|
|
@ -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;
|
||||
}
|
||||
|
|
@ -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;
|
||||
}
|
||||
|
|
@ -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
|
||||
|
|
@ -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();
|
||||
}
|
||||
|
|
|
|||
|
|
@ -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(®s, 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, ®s, ®s);
|
||||
|
||||
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;
|
||||
|
||||
}
|
||||
|
|
@ -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(®s, 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,
|
||||
®s, ®s);
|
||||
#endif
|
||||
}
|
||||
|
||||
void setup_pcat_compatibility(void)
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue