Updated the GRUB version info and how to build GRUB from source.

Added how to boot over the network with a PXE Netboot BIOS.

c/src/lib/libbsp/i386/pc386/HOWTO

@@ -1,5 +1,5 @@
 +-----------------------------------------------------------------------------+
-| RTEMS 4.5.0 PC386 BSP HOWTO - 1998/04/21                                    |
+| RTEMS 4.6.0 PC386 BSP HOWTO - 2003/05/08                                    |
 |                                                                             |
 +-----------------------------------------------------------------------------+
 | (C) Copyright 1998 -                                                        |
@@ -16,6 +16,7 @@
 +-----------------------------------------------------------------------------+
 | History:                                                                    |
 |  12 June 2000 - Updated to 4.5 (Joel)                                       |
+|   8 May  2003 - PXE GRUB (Chris Johns)                                      |
 +-----------------------------------------------------------------------------+
 
 CVS Revision: $Id$
@@ -30,7 +31,7 @@ above.
 
     It covers essentially the aspects of loading images, since
 information concerning other issues such as building the development
-tools and the RTEMS distribution can be found in the 'RTEMS 4.0.0
+tools and the RTEMS distribution can be found in the 'RTEMS 4.6.0
 On-Line Library' under 'Getting Started with RTEMS for C/C++ Users'.
 
     Please note that everything in the following text using the
@@ -42,7 +43,7 @@ substituted by the real thing!
 ------------------------------------------------
 
     Obtaining, building and installing the tools for building the
-PC386 BSP of RTEMS is covered in detail in the 'RTEMS 4.5.0 On-Line
+PC386 BSP of RTEMS is covered in detail in the 'RTEMS 4.6.0 On-Line
 Library' -> 'Getting Started with RTEMS for C/C++ Users'.  You can
 either use pre-built toolset executables or build your own from
 the instructions given there.
@@ -54,7 +55,7 @@ This is format used by the i386-rtems target.
 4. Building RTEMS
 -----------------
     Obtaining, building and installing the tools for building the
-PC386 BSP is covered in detail in the 'RTEMS 4.5.0 On-Line Library' ->
+PC386 BSP is covered in detail in the 'RTEMS 4.6.0 On-Line Library' ->
 'Getting Started with RTEMS for C/C++ Users' -> 'Building RTEMS'.
 
     When running configure, use the following values for the listed
@@ -106,31 +107,49 @@ restoring any files, use a command similar to the following:
       zcat <file>.tgz | tar tvf -
 
 
-6.2 Using GRUB to load RTEMS PC386 applications
+6.2 Using GRUB to load RTEMS PC386 applications from Floppy
------------------------------------------------
+-----------------------------------------------------------
 
     Using GRUB (GRand Unified Bootloader) is the simplest way to load
-and run your PC386 BSP samples, tests and programs.
+and run your PC386 BSP samples, tests and programs. You will need to build GRUB
+so you need a working GCC and friends. The online documentation for GRUB lists
+what you need:
+
+    - http://www.gnu.org/manual/grub/html_node/index.html
 
     You can get the latest release of GRUB from its homepage:
 
-    - http://www.gnu.org/grub/
+    - http://www.gnu.org/software/grub/
 
-NOTE: The former location was http://www.uruk.org/grub and ftp from
+    Once you obtain the .tar.gz archive from:
-      ftp://ftp.uruk.org/public/grub.
 
-    Once you obtain the .tar.gz archive 'grub-0.4.tar.gz', change to a
+    - ftp://alpha.gnu.org/gnu/grub/
-temporary directory (you won't need the grub files after this and can
-just go ahead and delete the whole directory structure that was
-generated) and unarchive 'grub-0.4.tar.gz' following the instructions
-given above in [2. Unarchiving].
 
-    After this is done change the directory to:
+Download the lastest version (grub-0.93.tar.gz), change to a temporary
+directory (you won't need the grub files after this and can just go ahead and
+delete the whole directory structure that was generated) and unarchive
+'grub-0.93.tar.gz' following the instructions given above in [2. Unarchiving].
 
-      grub-0.4/bin_std
+      $ cd /tmp
+      $ mkdir grub
+      $ cd grub
+      $ cat grub-0.93.tar.gz | gzip -d | tar xf -
 
-and there you'll find the two files you'll need from this archive:
+after this is done create a build directory and decend into it:
-'stage1' and 'stage2'.
+
+      $ mkdir build
+      $ cd build
+
+then configure GRUB with the standard options:
+
+      $ ../grub-0.93/configure
+
+and if successful run make:
+
+      $ make
+
+    Once complete you should have the 'stage1' and 'stage2' files. They will be
+in the directories with the same name.
 
     You should have two (2) formatted diskettes available. One of
 these will only be used temporarily to create the other one, and we'll
@@ -172,19 +191,21 @@ diskette.
    Execute your OS's equivalent of (this should work for recent
 FreeBSD versions and Linux just fine):
 
-     dd if=stage1 of=/dev/fd0 bs=512 count=1
+     dd if=stage1/stage1 of=/dev/fd0 bs=512 count=1
-     dd if=stage2 of=/dev/fd0 bs=512 seek=1
+     dd if=stage2/stage2 of=/dev/fd0 bs=512 seek=1
 
    Under DOS/Windows/NT, courtesy of Eric Hanchrow (erich@microsoft.com):
 
      * Use the copy /b command to binary concatenate the stage1 and
        stage2 files together via:
 
-         copy /b stage1 stage2 grub.raw
+         copy /b stage1\stage1 stage2\stage2 grub.raw
 
      * Use rawrite.exe (which is available in many places on the net and
        in some Linux distributions) to write grub.raw to a diskette.
 
+(CCJ: I am not sure about the Windows location etc)
+
    Next stage: copy the 'stage1' and 'stage2' files to the 'GRUB FS'
 diskette (if you are using Linux you can mount the diskette in an
 appropriate mount point and then 'cp' the files to it, if it is either
@@ -233,7 +254,79 @@ to choose which program you want to load from GRUB's menu.
 directory of the GRUB tree starting with the 'index.html' file.
 
 
-6.3  Using NetBoot to load RTEMS PC386 applications
+6.3 Using GRUB to load RTEMS PC386 applications via PXE NetBoot
+----------------------------------------------------------------
+
+PXE is the Intel Preboot Execution Environment. A number of PC 
+manufactures provide a PXE option in the BIOS. This is usually a 
+Net Boot option in a BIOS configuration screen. The simplist way to 
+load an RTEMS application via PXE is to use GRUB as a first stage 
+loader.
+
+You will need to determine your network card, and have a working
+network with a DHCP (or BOOTP), and TFTP server.
+
+You may to find a TFTP server that does not support option 
+negotiations. A google search shows a number of PC's have a buggy
+PXE loader. Supressing option negotiations seems to make them
+work.
+
+You will need to build GRUB for your network card. Follow the
+procedure in item 6.2 up to the configure point. At this point
+run the following configure command:
+
+    $ ../grub-0.93/configure --enable-diskless --enable-eepro100
+
+for an Etherexpress Pro 100 network card, then run make:
+
+    $ make
+
+    Once complete you should have the 'stage2/pxegrub' file. Copy 
+this to your TFTP server's download directory. Configure your
+DHCP server to provide an IP address and download the image. For
+the ISC server found on operating systems such as Linux something
+like the following should do:
+
+  #
+  # PC loading RTEMS via PXE and GRUB
+  #
+
+  group
+  {
+    filename "/tftpboot/pxeboot";
+    host rtems-pc { hardware ethernet 00:08:c7:73:41:65; }
+  }
+
+If all works your PC should boot and load GRUB over the network:
+
+    GRUB  version 0.93  (639K lower / 64512K upper memory)
+
+  Address: 10.10.10.10
+  NetMask: 255.255.255.0
+  Server: 10.10.10.1
+  Gateway: 10.10.10.1
+
+   [ Minimal BASH-like line editing is supported.  For the first word, TAB
+     lists possible command completions.  Anywhere else TAB lists the possible
+     completions of a device/filename. ]
+
+  grub>
+
+Copy your RTEMS executable to the TFTP server directory then enter 
+the following GRUB commands:
+
+  grub> root (nd)
+    Filesystem type is tftp, using whole disk
+
+  grub> kernel ticker.exe
+     [Multiboot-elf, <0x100000:0x1e5a4:0x2b08>, shtab=0x122140, entry=0x10000c]
+
+  grub> boot
+
+The GRUB documents how to get GRUB to load a configuration file.
+
+
+6.4 Using NetBoot to load RTEMS PC386 applications
 ---------------------------------------------------
 
     To load the '*.bt' files you can