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>
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:
-----------------------------------
+++ /dev/null
-/*
- * (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
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
+++ /dev/null
-/*
- * (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
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))
+++ /dev/null
-/*
- * (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
+++ /dev/null
-/*
- * (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;
-}
+++ /dev/null
-/*
- * (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;
-}
+++ /dev/null
-/*
- * (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
#include <stdio_dev.h>
#include <i8042.h>
#include <asm/ptrace.h>
-#include <asm/realmode.h>
#include <asm/io.h>
#include <asm/pci.h>
int drv_video_init(void)
{
-#ifndef CONFIG_X86_NO_REAL_MODE
- if (video_bios_init())
- return 1;
-#endif
-
return video_init();
}
+++ /dev/null
-/*
- * (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;
-
-}
#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
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;
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;
#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
"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)
projects / u-boot / commitdiff