Add a generic PC platform
This code adds a generic x86 platform, enabling barebox to act as a bootloader like 'GRUB'. Very minimalistic, yet. Supports only a serial console and is tested with QEMU only. Signed-off-by: Juergen Beisert <jbe@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Juergen Beisert
Sascha Hauer
parent
7dcc15e819
commit
46348b5d65
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@ -35,7 +35,7 @@ Blackfin type:
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x86 type:
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@li nothing yet
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@li @subpage generic_pc
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coldfire/m68k type:
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@ -0,0 +1,186 @@
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#
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# Automatically generated make config: don't edit
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# barebox version: 2009.12.0-x86-trunk
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#
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CONFIG_ARCH_TEXT_BASE=0x00007c00
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CONFIG_BOARDINFO="Generic x86 bootloader"
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# CONFIG_BOARD_LINKER_SCRIPT is not set
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CONFIG_GENERIC_LINKER_SCRIPT=y
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CONFIG_X86=y
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CONFIG_MACH_X86_GENERIC=y
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CONFIG_X86_BIOS_BRINGUP=y
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# CONFIG_X86_NATIVE_BRINGUP is not set
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#
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# BIOS boot source
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#
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CONFIG_X86_HDBOOT=y
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#
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# Board specific settings
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#
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CONFIG_GREGORIAN_CALENDER=y
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CONFIG_HAS_KALLSYMS=y
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CONFIG_HAS_MODULES=y
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CONFIG_CMD_MEMORY=y
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CONFIG_ENV_HANDLING=y
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#
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# General Settings
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#
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CONFIG_LOCALVERSION_AUTO=y
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#
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# memory layout
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#
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CONFIG_HAVE_CONFIGURABLE_TEXT_BASE=y
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CONFIG_TEXT_BASE=0x00007c00
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CONFIG_HAVE_CONFIGURABLE_MEMORY_LAYOUT=y
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CONFIG_MEMORY_LAYOUT_DEFAULT=y
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# CONFIG_MEMORY_LAYOUT_FIXED is not set
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CONFIG_STACK_SIZE=0x7000
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CONFIG_MALLOC_SIZE=0x400000
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CONFIG_BROKEN=y
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CONFIG_EXPERIMENTAL=y
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# CONFIG_MODULES is not set
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# CONFIG_KALLSYMS is not set
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CONFIG_PROMPT="uboot:"
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CONFIG_BAUDRATE=115200
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CONFIG_LONGHELP=y
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CONFIG_CBSIZE=1024
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CONFIG_MAXARGS=16
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CONFIG_SHELL_HUSH=y
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# CONFIG_SHELL_SIMPLE is not set
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CONFIG_GLOB=y
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CONFIG_PROMPT_HUSH_PS2="> "
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CONFIG_CMDLINE_EDITING=y
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CONFIG_AUTO_COMPLETE=y
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CONFIG_DYNAMIC_CRC_TABLE=y
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CONFIG_ERRNO_MESSAGES=y
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CONFIG_TIMESTAMP=y
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CONFIG_CONSOLE_FULL=y
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CONFIG_CONSOLE_ACTIVATE_FIRST=y
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# CONFIG_OF_FLAT_TREE is not set
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CONFIG_PARTITION=y
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CONFIG_DEFAULT_ENVIRONMENT=y
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CONFIG_DEFAULT_ENVIRONMENT_PATH="board/x86_generic/env"
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#
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# Debugging
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#
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CONFIG_DEBUG_INFO=y
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# CONFIG_ENABLE_FLASH_NOISE is not set
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# CONFIG_ENABLE_PARTITION_NOISE is not set
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# CONFIG_ENABLE_DEVICE_NOISE is not set
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#
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# Commands
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#
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#
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# scripting
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#
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CONFIG_CMD_EDIT=y
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CONFIG_CMD_SLEEP=y
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CONFIG_CMD_SAVEENV=y
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CONFIG_CMD_LOADENV=y
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CONFIG_CMD_EXPORT=y
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CONFIG_CMD_PRINTENV=y
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CONFIG_CMD_READLINE=y
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# CONFIG_CMD_TRUE is not set
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# CONFIG_CMD_FALSE is not set
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#
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# file commands
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#
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CONFIG_CMD_LS=y
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CONFIG_CMD_RM=y
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CONFIG_CMD_CAT=y
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CONFIG_CMD_MKDIR=y
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CONFIG_CMD_RMDIR=y
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CONFIG_CMD_CP=y
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CONFIG_CMD_PWD=y
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CONFIG_CMD_CD=y
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CONFIG_CMD_MOUNT=y
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CONFIG_CMD_UMOUNT=y
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#
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# console
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#
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CONFIG_CMD_CLEAR=y
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CONFIG_CMD_ECHO=y
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#
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# memory
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#
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# CONFIG_CMD_LOADB is not set
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# CONFIG_CMD_LOADY is not set
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# CONFIG_CMD_LOADS is not set
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CONFIG_CMD_MEMINFO=y
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# CONFIG_CMD_CRC is not set
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# CONFIG_CMD_MTEST is not set
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#
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# flash
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#
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# CONFIG_CMD_FLASH is not set
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#
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# booting
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#
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# CONFIG_CMD_BOOTM is not set
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CONFIG_CMD_LINUX16=y
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CONFIG_CMD_RESET=y
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CONFIG_CMD_GO=y
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CONFIG_CMD_TIMEOUT=y
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# CONFIG_CMD_PARTITION is not set
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CONFIG_CMD_TEST=y
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CONFIG_CMD_VERSION=y
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CONFIG_CMD_HELP=y
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CONFIG_CMD_DEVINFO=y
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# CONFIG_NET is not set
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#
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# Drivers
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#
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#
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# serial drivers
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#
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CONFIG_DRIVER_SERIAL_NS16550=y
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#
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# SPI drivers
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#
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# CONFIG_SPI is not set
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# CONFIG_I2C is not set
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#
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# flash drivers
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#
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# CONFIG_DRIVER_CFI is not set
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# CONFIG_DRIVER_CFI_OLD is not set
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# CONFIG_NAND is not set
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CONFIG_ATA=y
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#
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# drive types
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#
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CONFIG_ATA_DISK=y
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#
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# interface types
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#
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CONFIG_ATA_BIOS=y
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# CONFIG_USB is not set
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# CONFIG_USB_GADGET is not set
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# CONFIG_VIDEO is not set
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#
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# Filesystem support
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#
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# CONFIG_FS_CRAMFS is not set
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CONFIG_FS_RAMFS=y
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CONFIG_FS_DEVFS=y
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CONFIG_CRC32=y
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# CONFIG_GENERIC_FIND_NEXT_BIT is not set
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@ -0,0 +1 @@
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obj-y += generic_pc.o
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@ -0,0 +1,21 @@
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/*
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* Copyright (C) 2009 Juergen Beisert, Pengutronix
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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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/* nothing special yet */
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@ -0,0 +1,37 @@
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#!/bin/sh
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. /env/config
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if [ x$1 = xdisk ]; then
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root=disk
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kernel=disk
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fi
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if [ x$1 = xnet ]; then
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root=net
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kernel=net
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fi
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if [ x$ip = xdhcp ]; then
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bootargs="$bootargs ip=dhcp"
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else
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bootargs="$bootargs ip=$eth0.ipaddr:$eth0.serverip:$eth0.gateway:$eth0.netmask:::"
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fi
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if [ x$root = xdisk ]; then
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bootargs="$bootargs root=$rootpart_disk rootfstype=$rootpart_fs rw"
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else
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bootargs="$bootargs root=/dev/nfs nfsroot=$eth0.serverip:$nfsroot,v3,tcp rw"
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fi
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if [ $kernel = net ]; then
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if [ x$ip = xdhcp ]; then
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dhcp
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fi
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tftp $uimage uImage || exit 1
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bootm uImage
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else
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bootargs="BOOT_IMAGE=$kernel_device auto $bootargs"
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linux16 $kernel_device
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fi
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@ -0,0 +1,15 @@
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#!/bin/sh
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PATH=/env/bin
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export PATH
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. /env/config
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echo
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echo -n "Hit any key to stop autoboot: "
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timeout -a $autoboot_timeout
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if [ $? != 0 ]; then
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exit
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fi
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boot
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@ -0,0 +1,31 @@
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#
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# basic config
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#
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# boot source: 'disk' or 'net'
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kernel=disk
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root=disk
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# data for the NFS case
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nfsroot="/path/to/nfs_root"
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# data for the disk case
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kernel_device=/dev/biosdisk0.1
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rootpart_disk=/dev/sda1
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rootpart_fs=ext2
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baudrate=115200
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serial=ttyS0
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# use UART for console
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bootargs="console=$serial,$baudrate"
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autoboot_timeout=3
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# use 'dhcp' to do dhcp in uboot and in kernel
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# ip=dhcp
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# or set your networking parameters here
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# eth0.ipaddr=192.168.3.11
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# eth0.netmask=255.255.255.0
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# eth0.gateway=a.b.c.d
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# eth0.serverip=192.168.3.10
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# eth0.ethaddr=aa.bb.cc.dd.ee.ff
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@ -0,0 +1,140 @@
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/*
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* Copyright (C) 2009 Juergen Beisert, Pengutronix
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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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/**
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* @file
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* @brief Generic PC support to let barebox acting as a boot loader
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*/
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#include <common.h>
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#include <types.h>
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#include <driver.h>
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#include <init.h>
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#include <asm/syslib.h>
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#include <ns16550.h>
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static struct memory_platform_data ram_pdata = {
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.name = "ram0",
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.flags = DEVFS_RDWR,
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};
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static struct device_d sdram_dev = {
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.name = "mem",
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.size = 16 * 1024 * 1024,
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.map_base = 0,
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.platform_data = &ram_pdata,
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};
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static struct device_d bios_disk_dev = {
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.name = "biosdrive",
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.size = 1,
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};
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/*
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* These datas are from the MBR, created by the linker and filled by the
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* setup tool while installing barebox on the disk drive
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*/
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extern uint64_t pers_env_storage;
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extern uint16_t pers_env_size;
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extern uint8_t pers_env_drive;
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/**
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* Persistant environment "not used" marker.
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* Note: Must be in accordance to the value the tool "setup_mbr" writes.
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*/
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#define PATCH_AREA_PERS_SIZE_UNUSED 0x000
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static int devices_init(void)
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{
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int rc;
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sdram_dev.size = bios_get_memsize(); /* extended memory only */
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sdram_dev.size <<= 10;
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register_device(&sdram_dev);
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register_device(&bios_disk_dev);
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if (pers_env_size != PATCH_AREA_PERS_SIZE_UNUSED) {
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rc = devfs_add_partition("disk0", /* FIXME */
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pers_env_storage * 512,
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(unsigned)pers_env_size * 512,
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DEVFS_PARTITION_FIXED, "env0");
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printf("Partition: %d\n", rc);
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} else
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printf("No persistant storage defined\n");
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return 0;
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}
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device_initcall(devices_init);
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#ifdef CONFIG_DRIVER_SERIAL_NS16550
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static struct NS16550_plat serial_plat = {
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.clock = 1843200,
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.f_caps = CONSOLE_STDIN | CONSOLE_STDOUT | CONSOLE_STDERR,
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.reg_read = x86_uart_read,
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.reg_write = x86_uart_write,
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};
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/* we are expecting always one serial interface */
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static struct device_d generic_pc_serial_device = {
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.name = "serial_ns16550",
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.map_base = 0x3f8,
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.size = 8,
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.platform_data = (void *)&serial_plat,
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};
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static int pc_console_init(void)
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{
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/* Register the serial port */
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return register_device(&generic_pc_serial_device);
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}
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console_initcall(pc_console_init);
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#endif
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/** @page generic_pc Generic PC based bootloader
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This platform acts as a generic PC based bootloader. It depends on at least
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one boot media that is connected locally (no network boot) and can be
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handled by the regular BIOS (any kind of hard disks for example).
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The created @a barebox image can be used to boot a standard x86 bzImage
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Linux kernel.
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Refer section @ref x86_bootloader_preparations how to do so.
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How to get the binary image:
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Using the default configuration:
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@code
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make ARCH=x86 generic_defconfig
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@endcode
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Build the binary image:
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@code
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make ARCH=x86 CROSS_COMPILE=x86compiler
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@endcode
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@note replace the 'x86compiler' with your x86 (cross) compiler.
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*/
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Reference in New Issue