[PATCH 1/3] 8xx: Analogue & Micro Adder875 board support.

[Bryan O'Donoghue]

Greetings Scott.

I've tried both of the procedures you've outlined on the Adder875 with
the patches supplied against the paulus git tree to no avail.

Pass #1 :

Doing it safe with cuImage.8xx

Build system : Debian lenny, ELDK 4.1 uClibc
Kernel : Linux-2.6.24-rc6-g4f43143f-dirty - about two days old
Bootloader : U-Boot 1.3.1-g5c740711-dirty (Jan 15 2008 - 21:50)
	#define CONFIG_OF_LIBFDT 1
	#undef CONFIG_OF_FLAT_TREE
	- So that U-Boot will understand the three parameter bootm.
dtc : DTC 1.1.0-rc1

I do

1. source /opt/eldk/eldk_init ppc_8xx
2. export ARCH=powerpc

3. cd linux-2.6-paulus
4. git branch adder875-patchset master
5. git checkout adder875-patchset
6. cat ../adder875_patches/adder875.patch | patch -p1

The patch applies almost perfectly - except for a minor conflict in
arch/powerpc/boot/Makefile - where I add redboot-8xx.c right after
cuboot-rainer.c manually.

7. make distclean && mrproper && clean
8. make adder875-uboot_defconfig
9. make zImage

That runs just fine - and just to prove to you I haven't done anything
funny here the last few lines of output are

  HOSTLD  arch/powerpc/boot/dtc
  WRAP    arch/powerpc/boot/cuImage.8xx
DTC: dts->dtb  on file
"/home/deckard/Development/linux/linux-2.6-paulus/arch/powerpc/boot/dts/adder875-uboot.dts"
Image Name:   Linux-2.6.24-rc6-g4f43143f-dirty
Created:      Tue Jan 15 23:02:52 2008
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    1032266 Bytes = 1008.07 kB = 0.98 MB
Load Address: 0x00400000
Entry Point:  0x00400554
  WRAP    arch/powerpc/boot/zImage.redboot-8xx
DTC: dts->dtb  on file
"/home/deckard/Development/linux/linux-2.6-paulus/arch/powerpc/boot/dts/adder875-uboot.dts"

cp arch/powerpc/boot/ucImage.8xx /tftpboot

The U-Boot output is :
=> tftpboot 0x400000 cuImage.8xx
Using FEC ETHERNET device
TFTP from server 192.168.0.101; our IP address is 192.168.0.202
Filename 'cuImage.8xx'.
Load address: 0x400000
Loading:
#################################################################

#################################################################

#################################################################
         #######
done
Bytes transferred = 1032330 (fc08a hex)
=> bootm 0x400000
## Booting image at 00400000 ...
   Image Name:   Linux-2.6.24-rc6-g4f43143f-dirty
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    1032266 Bytes = 1008.1 kB
   Load Address: 00400000
   Entry Point:  00400554
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK

I haven't as yet tried to single step through the bootup process - but,
just to say that assuming the above procedure isn't _too_ far wrong -
the stuff posted to the list agains the tree you've recommended doesn't
seem to work..

If you can point out a flaw in my usage of it - that'd help alot. I have
some code I'd love to be able to use with the Adder875+powerpc layer -
which is why I'm interested in this patchset...


Pass #2 :

Replace step 9 with.

9. make uImage
10 dtc -o ../adder875-uboot.dtb -O dtb
arch/powerpc/boot/dts/adder875-uboot.dts 


cp arch/powerpc/boot/uImage /tftpboot
cp ../adder875-uboot.dtb /tftpboot

Finally in u-boot
=> tftpboot 0x400000 uImage
Using FEC ETHERNET device
TFTP from server 192.168.0.101; our IP address is 192.168.0.202
Filename 'uImage'.
Load address: 0x400000
Loading:
#################################################################

#################################################################

#################################################################
         ###
done
Bytes transferred = 1009496 (f6758 hex)
=> tftpboot 0x500000 adder875-uboot.dtb
Using FEC ETHERNET device
TFTP from server 192.168.0.101; our IP address is 192.168.0.202
Filename 'adder875-uboot.dtb'.
Load address: 0x500000
Loading: #
done
Bytes transferred = 3147 (c4b hex)
=> bootm 0x400000 - 0x500000
## Booting image at 00400000 ...
   Image Name:   Linux-2.6.24-rc6-g4f43143f-dirty
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    1009432 Bytes = 985.8 kB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
   Booting using the fdt at 0x500000


Aside from the u-boot modification of including

#define CONFIG_OF_LIBFDT 1

The rest is a pristine version of Yuli Barchoen's original U-Boot Adder
stuff.

The uImage + dtb seems to get a good bit further in that it seems to get
stuck somewhere inside of some trampoline code in time.c


(gdb) bt
#0  0xc000ee30 in __div64_32 ()
#1  0xc01d71f4 in time_init () at arch/powerpc/kernel/time.c:940


I might have a go at some proper debugging tomorrow after work.

If you have any suggestions as to what's going wrong or what I've not
done right I'd appreciate the help.

Best Regards,
BOD