Re: [COMMIT] VGABIOS support for EPIA

[Karl Hammar]

...
> You can make VGABIOS+Etherboot payload, to load VGABIOS *and*
> boot Etherboot.
> If your VGABIOS is 64K,
> cat video.bios.bin ide_disk.zelf >vgabios+etherboot.bin
>
> this command puts VGABIOS at beginning and Etherboot at +64K
> of the output file.
> Then, config like this will let LinuxBIOS boot the Etherboot:
> payload vgabios+etherboot.bin
> option VGABIOS_START=0xfffc0000
> option ZKERNEL_START=0xfffd0000
>
> To autmate the 'cat' step we need some hack to config file
> but I haven't figured it out.

Maybe something like:

$ cat lb
  #!/bin/sh

base=FFFC0000		# bc need it to be upcase
  out="vgabios+etherboot.bin"
  files="video.bios.bin ide_disk.zelf"

ls -l $files

: > config
  : > $out

echo payload $out > config

for i in $files
  do
    cat $i | dd bs=64k conv=sync 2>/dev/null >> $out	# pad the files to 64k
    size=`stat -L -c %s $out`				# filesize in bytes (decimal)
    hsz=`echo "obase=16; $size" | bc`			# filesize in bytes (hex)
    SSZ=`echo "obase=16; ibase=16; $base+$hsz" | bc`	# add it to $base
    echo option ${i}_START=0x$SSZ >> config
  done

ls -l $out
  echo Config file:
  cat config

Using faked input files just for testing:

$ ./lb
  -rw-r--r--    1 karl     users        5291 May 26 16:50 ide_disk.zelf
  -rw-r--r--    1 karl     users       17470 May 26 16:50 video.bios.bin
  -rw-r--r--    1 karl     users      131072 May 26 17:23 vgabios+etherboot.bin
  Config file:
  payload vgabios+etherboot.bin
  option video.bios.bin_START=0xFFFD0000
  option ide_disk.zelf_START=0xFFFE0000

Regards,
/Karl

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Karl Hammar                    Aspö Data           [e-mail]
Lilla Aspö 2340                                                Networks
S-742 94 Östhammar          [phone]                   Computers
Sweden                     [phone]                 Consulting
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