Config manual
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Ronald G. Minnich
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Documentation/configmanual.lyx
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Documentation/configmanual.lyx
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#This file was created by <root> Thu Jan 11 12:04:16 2001
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#LyX 1.0 (C) 1995-1999 Matthias Ettrich and the LyX Team
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\lyxformat 2.15
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\textclass article
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\language default
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\inputencoding latin1
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\fontscheme default
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\graphics default
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\paperfontsize default
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\spacing single
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\papersize Default
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\paperpackage a4
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\use_geometry 0
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\use_amsmath 0
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\paperorientation portrait
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\secnumdepth 3
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\tocdepth 3
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\paragraph_separation indent
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\defskip medskip
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\quotes_language english
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\quotes_times 2
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\papercolumns 1
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\papersides 1
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\paperpagestyle default
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\layout Title
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The LinuxBIOS Configuration Tool
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\layout Author
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Ron Minnich
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\layout Section
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All you need to know
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\layout Standard
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LinuxBIOS consists of two parts: a small bootstrap, which brings the hardware
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up; and a Linux kernel.
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The kernel is built in the usual manner.
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The bootstrap is built in a build directory, using source components that
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reside in a source tree.
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Unlike Linux, and very much like BSD, the bootstrap is intended to be built
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in a directory that is the
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\emph on
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outside
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\emph default
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the source tree.
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We structure it this way so that users can easily load the newest snapshot
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of LinuxBIOS from the sourceforge.net server, and then build a new LinuxBIOS.
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The directory in which LinuxBIOS is built is called the
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\emph on
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build
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\emph default
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directory; the source directory is called the
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\emph on
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source
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\emph default
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directory, and the Linux kernel directory is called (strangely enough)
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the
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\emph on
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kernel
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\emph default
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directory.
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\layout Standard
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The build directory is initially empty.
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Three files are needed to build a complete LInuxBIOS: a Makefile; a crt0.S
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(assembly startup) file; and ldscript.ld, a script for ld to link the objects
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into a bootstrap.
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Note that the bootstrap and the kernel are not linked via ld; they are
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totally seperated components.
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The Makefile contains the list of objects used to build the bootstrap;
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the location of the source tree; the location of the kernel; and any other
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commands needed to build a full LinuxBIOS romimage.
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The crt0.S file contains is just enough code to make the machine usable
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for the rest of the bootstrap, which is itself written in C.
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The ldscript.ld file defines address relocations for the bootstrap so it
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will run correctly from FLASH or Disk On Chip.
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\layout Standard
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The LinuxBIOS configuration tool is used to build these three critical files.
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The user writes a top-level configuration file and then runs the configuration
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tool.
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The tool uses other files in the source tree to set parameters for the
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generated files, and then writes the configuration files for a given build.
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\layout Subsection
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Configuration file Format
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\layout Standard
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We show an example of a configuration file in Figure
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\begin_inset LatexCommand \ref{sampleconfig}
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\end_inset
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.
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\layout Standard
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We will describe this file line by line.
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First, we name the build directory, in this case matsonic.
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Next, we name the mainboard: matsonic/ms7308e.
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Next we set a few options, such as SERIAL_CONSOLE (enable serial console
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logging); UPDATE_MICROCODE (the bootstrap will load new microcode on the
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broken Coppermine PIIIs if needed); ENABLE_L2_CACHE (the bootstrap will
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correctly enable L2 cache if needed); and finally, enable the VGA frame
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buffer.
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The next command (
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\family typewriter
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\size footnotesize
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linux /usr/src/linux
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\family default
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\size default
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) defines the path to vmlinux.
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Finally, the
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\family typewriter
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\size footnotesize
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commandline
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\family default
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\size default
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command sets the command line for Linux.
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The minimum commandline currently required is the one which sets the root
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file system.
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\layout Standard
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\begin_float fig
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\layout Standard
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\family typewriter
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\size footnotesize
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# Sample config file for Matsonic MS7308E with DoC Millennium (as root)
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\layout Standard
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\family typewriter
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\size footnotesize
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\protected_separator
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\layout Standard
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\family typewriter
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\size footnotesize
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# This will make a target directory of ./matsonic
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\layout Standard
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\family typewriter
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\size footnotesize
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target matsonic
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\layout Standard
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|
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\family typewriter
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\size footnotesize
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\protected_separator
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\layout Standard
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\family typewriter
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\size footnotesize
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# Matsonic MS7308E mainboard
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\layout Standard
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\family typewriter
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\size footnotesize
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mainboard matsonic/ms7308e
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\layout Standard
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\family typewriter
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\size footnotesize
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\protected_separator
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\layout Standard
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\family typewriter
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\size footnotesize
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# Enable Serial Console for debugging
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\layout Standard
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\family typewriter
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\size footnotesize
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option SERIAL_CONSOLE
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\layout Standard
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\family typewriter
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\size footnotesize
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\protected_separator
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\layout Standard
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\family typewriter
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\size footnotesize
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# Enable MicroCode update and L2 Cache init for PII and PIII
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\layout Standard
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\family typewriter
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\size footnotesize
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option UPDATE_MICROCODE
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\layout Standard
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\family typewriter
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\size footnotesize
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option CONFIGURE_L2_CACHE
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\layout Standard
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\family typewriter
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\size footnotesize
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\protected_separator
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\layout Standard
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\family typewriter
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\size footnotesize
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# Use the internal VGA frame buffer device
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\layout Standard
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\family typewriter
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\size footnotesize
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option HAVE_FRAMEBUFFER
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\layout Standard
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|
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|
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\family typewriter
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\size footnotesize
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\protected_separator
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\layout Standard
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\family typewriter
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\size footnotesize
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# Path to your kernel (vmlinux)
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\layout Standard
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\family typewriter
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\size footnotesize
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linux /usr/src/linux
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\layout Standard
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\family typewriter
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\size footnotesize
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\protected_separator
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\layout Standard
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\family typewriter
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\size footnotesize
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# Kernel command line parameters
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\layout Standard
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\family typewriter
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\size footnotesize
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commandline root=/dev/nftla1 single
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\layout Standard
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\family typewriter
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\size footnotesize
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\protected_separator
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\layout Caption
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\begin_inset LatexCommand \label{sampleconfig}
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\end_inset
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A Sample Configuration File for the Matsonic MS7308E
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\end_float
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\layout Standard
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This sample configuration file is all that you will usually need.
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In fact, all the configuration files we have written to date involve small
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variations on this file.
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\layout Subsection
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The commands you need to know
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\layout Standard
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There are only five commands used in the file above.
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We describe them in Table
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\begin_inset LatexCommand \ref{fivecommands}
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\end_inset
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.
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\layout Standard
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\begin_float tab
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\layout Standard
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\align center \LyXTable
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multicol5
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10 2 0 0 -1 -1 -1 -1
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1 1 0 0
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1 0 0 0
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1 0 0 0
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0 0 1 0
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0 0 1 0
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0 0 1 0
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0 0 1 0
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1 0 0 0
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1 1 0 0
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1 1 0 0
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8 1 0 "" ""
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8 1 1 "" ""
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0 8 1 0 0 0 0 "" ""
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0 8 1 0 0 0 0 "" ""
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0 8 1 0 0 0 0 "" ""
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0 8 1 0 0 0 0 "" ""
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0 8 1 0 0 0 0 "" ""
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0 8 1 0 1 0 0 "" ""
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0 8 1 0 0 0 0 "" ""
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0 8 1 0 1 0 0 "" ""
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0 8 1 0 0 0 0 "" ""
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0 8 1 0 1 0 0 "" ""
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0 8 1 0 0 0 0 "" ""
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0 8 1 0 1 0 0 "" ""
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0 8 1 0 0 0 0 "" ""
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0 8 1 0 0 0 0 "" ""
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0 8 1 0 0 0 0 "" ""
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0 8 1 0 0 0 0 "" ""
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0 8 1 0 0 0 0 "" ""
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0 8 1 0 0 0 0 "" ""
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0 8 1 0 0 0 0 "" ""
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0 8 1 0 0 0 0 "" ""
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Command
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\newline
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What it does
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\newline
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target
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\newline
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Name the build directory.
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(Should we remove this? seems pointless.)
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\newline
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mainboard
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\newline
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Name the mainboard to be used for this build.
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This command will
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\newline
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\newline
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cause the tool to look in the source tree for
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\newline
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\newline
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src/<mainboard name>/Config
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\newline
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\newline
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Commands in that Config file are processed.
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\newline
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\newline
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\newline
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option
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\newline
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Set an option in the Makefile
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\newline
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linux
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\newline
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Name the directory in which the kernel image (vmlinux) resides
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\newline
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commandline
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\newline
|
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Set the command line for Linux
|
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\layout Standard
|
||||
|
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|
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\begin_inset LatexCommand \label{fivecommands}
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|
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\end_inset
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|
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|
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\end_float
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\layout Comment
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A question on the target command.
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Shouldn't it be part of the invocation of the command? We're not sure we
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like this command.
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\layout Subsection
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||||
|
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Running the configuration tool
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\layout Standard
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||||
|
||||
To run the configuration tool, you need to make a build directory, then
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run the tool.
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The standard BSD config tool will delete and re-create build directories
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as needed, but we are not that confident.
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If you want the build directory removed or created, it is up to you.
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|
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\layout Standard
|
||||
|
||||
We show a sample run in Figure
|
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\begin_inset LatexCommand \ref{samplerun}
|
||||
|
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\end_inset
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||||
|
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.
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We cd to /tmp, make a build directory (matsonic), make a build file (matsonic.co
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nfig), and run the config tool using Python.
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The tool will show the additional config files it processes.
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Error handling right now is not very good, but there are some errors that
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it will show.
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\layout Standard
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||||
|
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\begin_float fig
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\layout Standard
|
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|
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|
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\family typewriter
|
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\size scriptsize
|
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[root@maxroach /tmp]# cd /tmp
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\layout Standard
|
||||
|
||||
|
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\family typewriter
|
||||
\size scriptsize
|
||||
[root@maxroach /tmp]# mkdir matsonic
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\layout Standard
|
||||
|
||||
|
||||
\family typewriter
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||||
\size scriptsize
|
||||
[root@maxroach /tmp]# cat > matsonic.config
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\layout Standard
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||||
|
||||
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\family typewriter
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||||
\size scriptsize
|
||||
target matsonic
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
|
||||
\protected_separator
|
||||
|
||||
\layout Standard
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||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
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# Matsonic MS7308E mainboard
|
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\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
mainboard matsonic/ms7308e
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
|
||||
\protected_separator
|
||||
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
# Enable Serial Console for debugging
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
option SERIAL_CONSOLE
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
|
||||
\protected_separator
|
||||
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
# Enable MicroCode update and L2 Cache init for PII and PIII
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
option UPDATE_MICROCODE
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
option CONFIGURE_L2_CACHE
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
|
||||
\protected_separator
|
||||
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
# Use the internal VGA frame buffer device
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
option HAVE_FRAMEBUFFER
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
|
||||
\protected_separator
|
||||
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
# Path to your kernel (vmlinux)
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
linux /usr/src/linux
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
|
||||
\protected_separator
|
||||
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
# Kernel command line parameters
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
commandline root=/dev/hda1
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
[root@maxroach /tmp]# python ~/src/freebios/util/config/NLBConfig.py matsonic.conf
|
||||
ig ~/src/freebios
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
Will place Makefile, crt0.S, ldscript.ld in
|
||||
\protected_separator
|
||||
matsonic
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
Process config file:
|
||||
\protected_separator
|
||||
/root/src/freebios/src/mainboard/matsonic/ms7308e/Config
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
Process config file:
|
||||
\protected_separator
|
||||
/root/src/freebios/src/northsouthbridge/sis/630/Config
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
Added ram init file:
|
||||
\protected_separator
|
||||
northsouthbridge/sis/630/raminit.inc
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
Process config file:
|
||||
\protected_separator
|
||||
/root/src/freebios/src/cpu/p5/Config
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
Process config file:
|
||||
\protected_separator
|
||||
/root/src/freebios/src/cpu/p6/Config
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
Process config file:
|
||||
\protected_separator
|
||||
/root/src/freebios/src/lib/Config
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
Now Process the base files
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
Makebase is : /root/src/freebios/util/config/make.base :
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
Trying to create
|
||||
\protected_separator
|
||||
matsonic/Makefile
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
Trying to create
|
||||
\protected_separator
|
||||
matsonic/ldscript.ld
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
Trying to create
|
||||
\protected_separator
|
||||
matsonic/crt0.S
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
Check for crt0.S param file: /root/src/freebios/src/include/northsouthbridge/sis/
|
||||
630/param.h
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
|
||||
\protected_separator
|
||||
Adding include to crt0.S for this parameter file:
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
|
||||
\protected_separator
|
||||
#include <northsouthbridge/sis/630/param.h>
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
|
||||
\protected_separator
|
||||
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
[root@maxroach /tmp]#
|
||||
\layout Standard
|
||||
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
|
||||
\protected_separator
|
||||
|
||||
\layout Caption
|
||||
|
||||
|
||||
\begin_inset LatexCommand \label{samplerun}
|
||||
|
||||
\end_inset
|
||||
|
||||
Running the config tool.
|
||||
Your output may vary somewhat.
|
||||
|
||||
\end_float
|
||||
\layout Standard
|
||||
|
||||
That is about all you should need to know to build most Linux kernels.
|
||||
In the next section we will cover more detail, for those who need to know
|
||||
more.
|
||||
|
||||
\layout Section
|
||||
|
||||
More than you need to know
|
||||
\layout Standard
|
||||
|
||||
The config tool is written in Python, and processes files written in a little
|
||||
language.
|
||||
Most of the commands in the little language set values of variables in
|
||||
the program, or add elements to lists.
|
||||
Some of the commands result in other files being read in and processed.
|
||||
In most cases these are other configuration files.
|
||||
Commands that name hardware (such as the
|
||||
\family typewriter
|
||||
mainboard
|
||||
\family default
|
||||
command) in most cases search for a configuration file in the path TOP/src/<nam
|
||||
e>/Config, where TOP represents the top of the source tree.
|
||||
For an example, see Table
|
||||
\begin_inset LatexCommand \ref{fivecommands}
|
||||
|
||||
\end_inset
|
||||
|
||||
.
|
||||
|
||||
\layout Standard
|
||||
|
||||
The naming of resources in most cases is <vendor id>/<hardware>.
|
||||
We show the resource names in Table
|
||||
\begin_inset LatexCommand \ref{resourcepaths}
|
||||
|
||||
\end_inset
|
||||
|
||||
.
|
||||
|
||||
\layout Standard
|
||||
|
||||
\begin_float tab
|
||||
\layout Standard
|
||||
\align center \LyXTable
|
||||
multicol5
|
||||
12 2 0 0 -1 -1 -1 -1
|
||||
1 1 0 0
|
||||
1 0 0 0
|
||||
1 0 0 0
|
||||
0 0 1 0
|
||||
0 0 1 0
|
||||
1 0 0 0
|
||||
1 0 0 0
|
||||
0 0 1 0
|
||||
0 0 1 0
|
||||
1 0 0 0
|
||||
1 0 0 0
|
||||
1 1 0 0
|
||||
8 1 0 "" ""
|
||||
8 1 1 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 1 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 1 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 1 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 1 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
0 8 1 0 0 0 0 "" ""
|
||||
|
||||
Resource Name
|
||||
\newline
|
||||
Path
|
||||
\newline
|
||||
mainboard
|
||||
\newline
|
||||
TOP/src/mainboard/<vendor>/<partname>
|
||||
\newline
|
||||
cpu
|
||||
\newline
|
||||
TOP/src/cpu/<partname>.
|
||||
|
||||
\newline
|
||||
|
||||
\newline
|
||||
NOTE: no vendor in this path.
|
||||
We did this because so much of this
|
||||
\newline
|
||||
|
||||
\newline
|
||||
code is generic.
|
||||
Was this right?
|
||||
\newline
|
||||
northbridge
|
||||
\newline
|
||||
TOP/src/northbridge/<vendor>/<partname>
|
||||
\newline
|
||||
northsouthbridge
|
||||
\newline
|
||||
TOP/src/northsouthbridge/<vendor>/<partname>
|
||||
\newline
|
||||
|
||||
\newline
|
||||
NOTE: sets path for northbridge and southbridge,
|
||||
\newline
|
||||
|
||||
\newline
|
||||
since this command is for integrated chipsets (i.e.
|
||||
SiS 630)
|
||||
\newline
|
||||
southbridge
|
||||
\newline
|
||||
TOP/src/southbridge/<vendor>/<partname>
|
||||
\newline
|
||||
superio
|
||||
\newline
|
||||
TOP/src/superio/<vendor>/<partname>
|
||||
\newline
|
||||
pcibridge
|
||||
\newline
|
||||
TOP/src/pcibridge/<vendor>/<partname>
|
||||
\layout Caption
|
||||
|
||||
|
||||
\begin_inset LatexCommand \label{resourcepaths}
|
||||
|
||||
\end_inset
|
||||
|
||||
How resources are named
|
||||
\end_float
|
||||
\layout Standard
|
||||
|
||||
The commands and their effects are shown in Table
|
||||
\layout Standard
|
||||
|
||||
\the_end
|
||||
Loading…
Add table
Add a link
Reference in a new issue