[oe] Puzzled over Angstrom generated kernel on a new board

[Daniel P. Smith]

Hey all,

I am working on getting OE running on the Gateworks' Laguna platform which uses the Cavium Networks Econa CNS3xxx (ARM11 MPcore) processor. The Gateworks' BSP for the Laguna is provided as a patch set to OpenWRT. I have created a kernel recipe that includes all the provided patches. The resulting kernel uImage from bitbake faults(interrupt raised or just freezes) right after decompression starts. What is puzzling is that I able to build a working kernel by manually running the build using the internal OE toolchain (note that local make and mkimage was used though). I am curious if anyone may have a hint why the bitbake generated uImage faults.

Below is the serial output from a session that just froze.

U-Boot 2008.10-mpcore-svn119 (Aug  3 2010 - 13:23:17)

CPU: Cavium Networks CNS3000
ID Code: 410fb024 (Part number: 0xB02, Revision number: 4)
CPU ID: 900
I2C:   ready
DRAM:  128 MB
Flash: 16 MB
Gateworks Corporation Copyright 2010
Model Number: GW2388-SP212-A
Manufacturer Date: 01-21-2002
Serial #: 259328
Net:   eth0, eth1, eth2
Hit any key to stop autoboot:  0
Laguna > printenv
bootargs=console=ttyS0,115200 root=/dev/mtdblock3 rootfstype=squashfs,jffs2 noinitrd init=/etc/preinit
bootcmd=bootm 0x10060000
baudrate=115200
netmask=255.255.0.0
tftp_bsize=512
udp_frag_size=512
ethaddr=00:D0:12:4B:ED:24
eth1addr=00:D0:12:4B:ED:25
eth2addr=00:D0:12:4B:ED:26
ethact=eth0
bootdelay=5
ipaddr=172.16.20.1
serverip=172.16.20.101
stdin=serial
stdout=serial
stderr=serial

Environment size: 384/131068 bytes 
Laguna > tftpboot 0x800000 /laguna/uImage-laguna.bin
Using eth0 device
TFTP from server 172.16.20.101; our IP address is 172.16.20.1
Filename '/laguna/uImage-laguna.bin'.
Load address: 0x800000
Loading: T T #################################################################
         #################################################################
         #################################################################
         #################################################################
         ###################################################
done
Bytes transferred = 1589252 (184004 hex)
Laguna > bootm 0x800000
## Booting kernel from Legacy Image at 00800000 ...
   Image Name:   Angstrom/2.6.31.14/laguna
   Created:      2011-05-05  15:32:55 UTC
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    1589188 Bytes =  1.5 MB
   Load Address: 20008000
   Entry Point:  20008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
OK

Starting kernel ...

Uncompressing Liu


Here is how I ran the manual kernel build, this was ran in the kernel work directory of my OE build.

  $ export TOOLCHAIN=/home/viscous/project/oe/build-laguna/tmp/sysroots/i686-linux/usr/armv6
  $ export PATH=$TOOLCHAIN/bin:$PATH
  $ export CCFLAGS="-march=armv6k -mtune=mpcore -mfpu=vfp -mfloat-abi=softfp -funit-at-a-time"
  $ make clean
  $ make CROSS_COMPILE="arm-angstrom-linux-gnueabi-" ARCH="arm" KBUILD_HAVE_NLS=no CONFIG_SHELL="/bin/bash" CC="arm-angstrom-linux-gnueabi-gcc" "uImage"

Here is the machine configuration,

include/tune-cns3xxx.inc
========================
TARGET_CC_ARCH = "-march=armv6k -mtune=mpcore -mfpu=vfp -mfloat-abi=softfp -funit-at-a-time"
TARGET_CC_KERNEL_ARCH = "-march=armv6k -mtune=mpcore -mfpu=vfp -mfloat-abi=softfp -funit-at-a-time"
FEED_ARCH = "armv6"
BASE_PACKAGE_ARCH = "armv6"
PACKAGE_EXTRA_ARCHS += "armv4 armv4t armv5te armv6"

laguna.conf
========================
#@TYPE: Machine
#@NAME: Laguna
#@DESCRIPTION: The Gateworks Laguna GW2388 Router Board.
TARGET_ARCH = "arm"

PREFERRED_PROVIDER_virtual/kernel = "linux-cns3xxx"
PREFERRED_VERSION_linux-cns3xxx ?= "2.6.31.14"

MACHINE_FEATURES = "kernel26 uboot pci ext2 wifi usbhost usbgadget"
SERIAL_CONSOLE = "-L 115200 ttyS0"

CPU_FEATURES += "vfp"

require conf/machine/include/tune-cns3xxx.inc

KERNEL_IMAGETYPE = "uImage"


V/r,
Daniel P. Smith