Re: [LinuxBIOS] Tyan s2892 the OLPC way

[Lu, Yinghai]

It didn't find the partitions. Try to enable partition in your kernel
config.

YH

-----Original Message-----
From: Myles Watson [mailto:[e-mail]] 
Sent: Friday, October 13, 2006 1:29 PM
To: Lu, Yinghai; [e-mail]
Subject: RE: [LinuxBIOS] Tyan s2892 the OLPC way
> Boot log?

Attached. Sorry it took so long.  I needed to change the console to the
serial port.

Myles
> > > I think the error is something different.  I can mount my USB key
>
> that I
> > > formatted ext2, but when I try /dev/hda1 instead of /dev/sda1, it
>
> says
> > > Unknown error 6, which is "no such device or address".
> >
> > Forgive if you have done this already Just trying to cover all the
> > simple fixes first.   Have you verified that you really have IDE
> > devices enabled in your kernel?
>
> No problem, I appreciate the help
>
> I have
> CONFIG_IDE
> CONFIG_BLK_DEV_IDE
> CONFIG_IDE_GENERIC
>
> All enabled.  I couldn't find any others that made sense to me.
>
> Myles

[LinuxBIOS] Tyan s2892 the OLPC way

[Myles Watson]

> > > > I think the error is something different.  I can mount my USB key
> >
> > that I
> > > > formatted ext2, but when I try /dev/hda1 instead of /dev/sda1, it
> >
> > says
> > > > Unknown error 6, which is "no such device or address".
> > >
> > > Forgive if you have done this already Just trying to cover all the
> > > simple fixes first.   Have you verified that you really have IDE
> > > devices enabled in your kernel?
> >
> > No problem, I appreciate the help
> >
> > I have
> > CONFIG_IDE
> > CONFIG_BLK_DEV_IDE
> > CONFIG_IDE_GENERIC
> >
> > All enabled.  I couldn't find any others that made sense to me.

I was missing CONFIG_BLK_DEV_IDEDISK

The disks were recognized in the IDE driver, but the disk enumeration
functions were never called.

Thanks again for your help.  It mounts and kexecs.

Myles

[LinuxBIOS] Tyan s2892 the OLPC way

[ron minnich]

A quick writeup to the list of what you ended up doing would be great!

thanks

ron

[LinuxBIOS] Tyan s2892 the OLPC way

[Myles Watson]

> A quick writeup to the list of what you ended up doing would be great!
> thanks
> ron

Here it is.  Feel free to ask for clarifications.
Myles

Purpose: 
Customize the system to allow me to play with memory mappings and large
devices.  I wanted to minimize intermediate steps from LinuxBIOS to Linux to
minimize the areas of expertise I needed to develop. I also wanted to be
able to use the SATA drives as my boot drives.

Disclaimer: 
There are several places where my solutions are not as elegant as I wished
them to be.  Suggestions are welcome.

Current set up:
Tyan s2892 
LinuxBIOS with Linux 2.6.18-tiny as a payload

I started by installing LinuxBIOS on the system and using FILO and Etherboot
to boot to a kernel.  This allowed me to try the different payloads without
flashing every time.

Next I downloaded the OLPC buildrom

git clone git://dev.laptop.org/users/jcrouse/buildrom

I built it on my 32-bit system for convenience building the kernel.

I modified the Config.mk to include pciutils from

http://buildroot.uclibc.org/cgi-bin/viewcvs.cgi/trunk/buildroot/package/

and took out the graphical boot menu.  I also modified
buildrom/skeleton/devices.txt to add lines for my hard drives.  I just
copied the lines for sda and sda1 and made had hda1 hda2 and sda2.  The
important thing is to make sure that the major and minor numbers are
correct.

I modified buildrom/skeleton/linuxrc so that the device files were created
earlier, /dev/null didn't become a text file, and my drives got mounted.

I then modified buildrom/skeleton/bin/boot.functions so that doboot() called
my script on the hard drive for the kexec.  That's nice to avoid flashing
the BIOS for booting different kernels.

I downloaded Linux 2.6.18.1 (2.6.18-rc4 had some problems with SATA) and
patched it with the tiny patches that came with OLPC.
12-tiny-tiny-crc.patch fails, but was easy to apply by hand.

I configured the kernel to include support for ext2 and ext3, SATA, and IDE.

I ran make and copied the payloads from the buildrom/deploy directory to my
s2892 to be used. olpc-payload.elf.lzma (732K) is used for booting directly
from LinuxBIOS, and olpc-payload-uncompressed.elf (1.7M) was useful for
testing it with FILO and Etherboot.

I'd like to go one step further and use a 64-bit kernel so that any changes
I make to the kernel only need to be made once. Looking at mkelfimage, it
looks like the 64-bit file format is not supported.  It might be a simple
change, but I don't know how to do it.

Since I couldn't figure out how to make LinuxBIOS do without the Fallback
image, I configured it to have a zero size payload.

Now I have 
normal/linuxbios.strip (128K)
fallback/linuxbios.strip (128K)
normal/payload (732K)
fallback/payload (0K)
s2892vBIOS.bin (36K)

If I could get rid of the fallback it would make room for the 64-bit kernel
(50K bigger than the 32-bit kernel).  Then I'd just need to modify
mkelfimage and I'd be almost there :) I guess I could take out pciutils to
make up most of the difference (44K), but I like having them there for
debug.

-----------------------Config.lb----------------------

# Sample config file for
# the Tyan s2892
# This will make a target directory of ./s2892

target s2892
mainboard tyan/s2892

option ROM_SIZE	     =0xf7000

option CONFIG_ROM_STREAM=1

option CONFIG_CONSOLE_SERIAL8250=1
option CONFIG_CONSOLE_VGA=1
option FALLBACK_SIZE =0x20000
option ROM_IMAGE_SIZE=0x20000

# Tyan s2892
romimage "normal"
    option CONFIG_COMPRESSED_ROM_STREAM_LZMA=1
    option CONFIG_PRECOMPRESSED_ROM_STREAM=1
    option USE_FALLBACK_IMAGE=0
    option LINUXBIOS_EXTRA_VERSION="$(shell cat ../../VERSION)_Normal"
    payload ../olpc-payload.elf.lzma
end

romimage "fallback"
    option CONFIG_COMPRESSED_ROM_STREAM_LZMA=0
    option CONFIG_PRECOMPRESSED_ROM_STREAM=0
    option USE_FALLBACK_IMAGE=1
    option LINUXBIOS_EXTRA_VERSION="$(shell cat ../../VERSION)_Fallback"
    payload ../payload.zero
end

buildrom ./linuxbios.rom ROM_SIZE "normal" "fallback"

[LinuxBIOS] Tyan s2892 the OLPC way

[Stefan Reinauer]

* Myles Watson  [061017 17:35]:
> > A quick writeup to the list of what you ended up doing would be great!
> > thanks
> > ron
>
> Here it is.  Feel free to ask for clarifications.
> Myles

Thank you very much! I added it to the build tutorial section of the
Documentation page in the wiki. I'll do some formatting to it now.
> Purpose: 
> Customize the system to allow me to play with memory mappings and large
> devices.  I wanted to minimize intermediate steps from LinuxBIOS to Linux to
> minimize the areas of expertise I needed to develop. I also wanted to be
> able to use the SATA drives as my boot drives.
>
> Disclaimer: 
> There are several places where my solutions are not as elegant as I wished
> them to be.  Suggestions are welcome.
>
> Current set up:
> Tyan s2892 
> LinuxBIOS with Linux 2.6.18-tiny as a payload
>
> I started by installing LinuxBIOS on the system and using FILO and Etherboot
> to boot to a kernel.  This allowed me to try the different payloads without
> flashing every time.
>
> Next I downloaded the OLPC buildrom
>
> git clone git://dev.laptop.org/users/jcrouse/buildrom
>
> I built it on my 32-bit system for convenience building the kernel.
>
> I modified the Config.mk to include pciutils from
>
> http://buildroot.uclibc.org/cgi-bin/viewcvs.cgi/trunk/buildroot/package/
>
> and took out the graphical boot menu.  I also modified
> buildrom/skeleton/devices.txt to add lines for my hard drives.  I just
> copied the lines for sda and sda1 and made had hda1 hda2 and sda2.  The
> important thing is to make sure that the major and minor numbers are
> correct.
>
> I modified buildrom/skeleton/linuxrc so that the device files were created
> earlier, /dev/null didn't become a text file, and my drives got mounted.
>
> I then modified buildrom/skeleton/bin/boot.functions so that doboot() called
> my script on the hard drive for the kexec.  That's nice to avoid flashing
> the BIOS for booting different kernels.
>
> I downloaded Linux 2.6.18.1 (2.6.18-rc4 had some problems with SATA) and
> patched it with the tiny patches that came with OLPC.
> 12-tiny-tiny-crc.patch fails, but was easy to apply by hand.
>
> I configured the kernel to include support for ext2 and ext3, SATA, and IDE.
>
> I ran make and copied the payloads from the buildrom/deploy directory to my
> s2892 to be used. olpc-payload.elf.lzma (732K) is used for booting directly
> from LinuxBIOS, and olpc-payload-uncompressed.elf (1.7M) was useful for
> testing it with FILO and Etherboot.
>
> I'd like to go one step further and use a 64-bit kernel so that any changes
> I make to the kernel only need to be made once. Looking at mkelfimage, it
> looks like the 64-bit file format is not supported.  It might be a simple
> change, but I don't know how to do it.
>
> Since I couldn't figure out how to make LinuxBIOS do without the Fallback
> image, I configured it to have a zero size payload.
>
> Now I have 
> normal/linuxbios.strip (128K)
> fallback/linuxbios.strip (128K)
> normal/payload (732K)
> fallback/payload (0K)
> s2892vBIOS.bin (36K)
>
> If I could get rid of the fallback it would make room for the 64-bit kernel
> (50K bigger than the 32-bit kernel).  Then I'd just need to modify
> mkelfimage and I'd be almost there :) I guess I could take out pciutils to
> make up most of the difference (44K), but I like having them there for
> debug.
>
> -----------------------Config.lb----------------------
>
> # Sample config file for
> # the Tyan s2892
> # This will make a target directory of ./s2892
>
> target s2892
> mainboard tyan/s2892
>
> option ROM_SIZE	     =0xf7000
>
> option CONFIG_ROM_STREAM=1
>
> option CONFIG_CONSOLE_SERIAL8250=1
> option CONFIG_CONSOLE_VGA=1
> option FALLBACK_SIZE =0x20000
> option ROM_IMAGE_SIZE=0x20000
>
> # Tyan s2892
> romimage "normal"
>    option CONFIG_COMPRESSED_ROM_STREAM_LZMA=1
>    option CONFIG_PRECOMPRESSED_ROM_STREAM=1
>    option USE_FALLBACK_IMAGE=0
>    option LINUXBIOS_EXTRA_VERSION="$(shell cat ../../VERSION)_Normal"
>    payload ../olpc-payload.elf.lzma
> end
>
> romimage "fallback"
>    option CONFIG_COMPRESSED_ROM_STREAM_LZMA=0
>    option CONFIG_PRECOMPRESSED_ROM_STREAM=0
>    option USE_FALLBACK_IMAGE=1
>    option LINUXBIOS_EXTRA_VERSION="$(shell cat ../../VERSION)_Fallback"
>    payload ../payload.zero
> end
>
> buildrom ./linuxbios.rom ROM_SIZE "normal" "fallback"

[LinuxBIOS] Tyan s2892 the OLPC way

[yhlu]

Also try to reduce ROM_IMAGE_SIZE to get more space
> target s2892
> mainboard tyan/s2892
>
> option ROM_SIZE      =0xf7000
>
> option CONFIG_ROM_STREAM=1
>
> option CONFIG_CONSOLE_SERIAL8250=1
> option CONFIG_CONSOLE_VGA=1
> option FALLBACK_SIZE =0xf7000
> option ROM_IMAGE_SIZE=0x20000
>
> # Tyan s2892
> romimage "fallback"
>         option CONFIG_COMPRESSED_ROM_STREAM_LZMA=0
>         option CONFIG_PRECOMPRESSED_ROM_STREAM=0
>         option USE_FALLBACK_IMAGE=1
>         option LINUXBIOS_EXTRA_VERSION="$(shell cat ../../VERSION)_Fallback"
>         payload ../olpc-payload.elf.lzma
> end
>
> buildrom ./linuxbios.rom ROM_SIZE "fallback"