Toradex Colibri Tegra 2 -- first step

Just a quick post. Thanks to the work of ant micro guys on Toradex Colibri Tegra 250 U-Boot, I was able to use that as a jump start towards Tegra 250 Linux port. I did a very very basic port, the bootlog follows.

I will eventually work on this port more as it seems quite interesting.


U-Boot 2011.03-rc2 (Apr 27 2011 - 21:33:54)

TEGRA2
Board: TORADEX Colibri Tegra2
dynamic ram_size = 268435456
DRAM: 256 MiB
Using default environment

In: serial
Out: serial
Err: serial
Net: Net Initialization Skipped
No ethernet found.
Colibri Tegra2 # usb reset ; setenv serverip 10.0.0.1 ; setenv ipaddr 10.0.0.2 ; setenv netmask 255.255.255.0 ; tftpboot 0x01000000 10.0.0.1:uImage ; bootm 0x01000000
(Re)start USB...
USB: Register 10011 NbrPorts 1
USB EHCI 1.00
scanning bus for devices... 2 USB Device(s) found
scanning bus for storage devices... 0 Storage Device(s) found
scanning bus for ethernet devices... 1 Ethernet Device(s) found
Waiting for Ethernet connection... done.
Using asx0 device
TFTP from server 10.0.0.1; our IP address is 10.0.0.2
Filename 'uImage'.
Load address: 0x1000000
Loading: EHCI timed out on TD - token=0x8008d80
T #################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
##
done
Bytes transferred = 2336144 (23a590 hex)
## Booting kernel from Legacy Image at 01000000 ...
Image Name: Linux-3.0.0-rc1-08421-g4f2e4c1-d
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 2336080 Bytes = 2.2 MiB
Load Address: 00008000
Entry Point: 00008000
Verifying Checksum ... OK
Loading Kernel Image ... OK
OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Linux version 3.0.0-rc1-08421-g4f2e4c1-dirty (root@mashiro) (gcc version 4.4.5 (Debian 4.4.5-8) ) #11 SMP PREEMPT Fri Jun 10 05:18:47 CEST 2011
[ 0.000000] CPU: ARMv7 Processor [411fc090] revision 0 (ARMv7), cr=10c5387f
[ 0.000000] CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
[ 0.000000] Machine: Toradex Colibri Tegra2
[ 0.000000] Memory policy: ECC disabled, Data cache writealloc
[ 0.000000] Tegra SKU: 8 CPU Process: 0 Core Process: 0
[ 0.000000] L310 cache controller enabled
[ 0.000000] l2x0: 8 ways, CACHE_ID 0x410000c4, AUX_CTRL 0x6e080001, Cache size: 65536 B
[ 0.000000] PERCPU: Embedded 7 pages/cpu @c06ef000 s4960 r8192 d15520 u32768
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 65024
[ 0.000000] Kernel command line: mem=256M@0x0 console=ttyS0,115200
[ 0.000000] PID hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
[ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
[ 0.000000] Memory: 256MB = 256MB total
[ 0.000000] Memory: 254776k/254776k available, 7368k reserved, 0K highmem
[ 0.000000] Virtual kernel memory layout:
[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)
[ 0.000000] fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
[ 0.000000] DMA : 0xffc00000 - 0xffe00000 ( 2 MB)
[ 0.000000] vmalloc : 0xd0800000 - 0xfe000000 ( 728 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xd0000000 ( 256 MB)
[ 0.000000] pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB)
[ 0.000000] modules : 0xbf000000 - 0xbfe00000 ( 14 MB)
[ 0.000000] .init : 0xc0008000 - 0xc00e3000 ( 876 kB)
[ 0.000000] .text : 0xc00e3000 - 0xc0474ddc (3656 kB)
[ 0.000000] .data : 0xc0476000 - 0xc04a5ce0 ( 192 kB)
[ 0.000000] Preemptible hierarchical RCU implementation.
[ 0.000000] NR_IRQS:416
[ 0.000000] sched_clock: 32 bits at 1000kHz, resolution 1000ns, wraps every 4294967ms
[ 0.005600] Calibrating delay loop... 1987.37 BogoMIPS (lpj=9936896)
[ 0.060049] pid_max: default: 32768 minimum: 301
[ 0.060431] Mount-cache hash table entries: 512
[ 0.061121] Initializing cgroup subsys debug
[ 0.061131] Initializing cgroup subsys cpuacct
[ 0.061157] Initializing cgroup subsys freezer
[ 0.061216] CPU: Testing write buffer coherency: ok
[ 0.061406] Calibrating local timer... 249.49MHz.
[ 0.260476] CPU1: Booted secondary processor
[ 0.320055] Brought up 2 CPUs
[ 0.320064] SMP: Total of 2 processors activated (3981.31 BogoMIPS).
[ 0.325413] print_constraints: dummy:
[ 0.325634] NET: Registered protocol family 16
[ 0.333888] bio: create slab at 0
[ 0.334557] vgaarb: loaded
[ 0.335681] Switching to clocksource timer_us
[ 0.337174] NET: Registered protocol family 2
[ 0.337330] IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.337807] TCP established hash table entries: 8192 (order: 4, 65536 bytes)
[ 0.337944] TCP bind hash table entries: 8192 (order: 4, 98304 bytes)
[ 0.338055] TCP: Hash tables configured (established 8192 bind 8192)
[ 0.338063] TCP reno registered
[ 0.338072] UDP hash table entries: 128 (order: 0, 4096 bytes)
[ 0.338167] UDP-Lite hash table entries: 128 (order: 0, 4096 bytes)
[ 0.338532] NET: Registered protocol family 1
[ 0.339113] RPC: Registered named UNIX socket transport module.
[ 0.339121] RPC: Registered udp transport module.
[ 0.339127] RPC: Registered tcp transport module.
[ 0.339133] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 0.340005] Switched to NOHz mode on CPU #0
[ 0.340479] Switched to NOHz mode on CPU #1
[ 0.799161] io scheduler noop registered (default)
[ 0.799366] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[ 1.145889] ttyS0: detected caps 00001100 should be 00003100
[ 1.145903] serial8250.0: ttyS0 at MMIO 0x70006000 (irq = 68) is a XScale
[ 1.507896] console [ttyS0] enabled
[ 1.628949] loop: module loaded
[ 1.632324] i2c-core: driver [apds9802als] using legacy suspend method
[ 1.638867] i2c-core: driver [apds9802als] using legacy resume method
[ 1.645365] i2c-core: driver [isl29003] using legacy suspend method
[ 1.651637] i2c-core: driver [isl29003] using legacy resume method
[ 1.658610] sdhci: Secure Digital Host Controller Interface driver
[ 1.664775] sdhci: Copyright(c) Pierre Ossman
[ 1.669576] TCP cubic registered
[ 1.672953] NET: Registered protocol family 10
[ 1.678392] Mobile IPv6
[ 1.680831] IPv6 over IPv4 tunneling driver
[ 1.686364] NET: Registered protocol family 17
[ 1.690824] NET: Registered protocol family 15
[ 1.695255] VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 1
[ 1.702955] Registering SWP/SWPB emulation handler
[ 1.713026] Kernel not built with RTC support, ALARM timers will not wake from suspend
[ 1.721309] Freeing init memory: 876K
(II) mounting sysfs to /sys
(II) mounting procfs to /proc
(II) mounting devpts to /dev/pts
(II) mounting debugfs to /sys/kernel/debug
(II) ifconfig usb0 10.0.0.2 netmask 255.255.255.0
ifconfig: SIOCSIFADDR: No such device
/bin/sh: can't access tty; job control turned off
~ # cat /proc/cpuinfo
Processor : ARMv7 Processor rev 0 (v7l)
processor : 0
BogoMIPS : 1987.37

processor : 1
BogoMIPS : 1993.93

Features : swp half thumb fastmult vfp edsp vfpv3 vfpv3d16
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x1
CPU part : 0xc09
CPU revision : 0

Hardware : Toradex Colibri Tegra2
Revision : 0000
Serial : 0000000000000000

It's been half a year again ...

It's been more than half a year since I last published here. It's just about time to sum things up again.

Firstly, this whole lag is because there was that Operating Systems class where our team wrote a complete OS for MIPS R4kc, including kernel threads, memory management, disk driver, SMP support, userland support etc.

Then, me and Cyril Hrubis started lecturing class "NSWI075 -- Linux kernel" on the university we both study at, Charles University in Prague, Faculty of Mathematics and Physics. The class was enjoyable, even though it was a lot of work to prepare for each of the lectures. Even through this stuff went on, we even managed to make a 2-and-half day long hack-a-ton for our students.

This actually resulted in us finding there are some very capable people in the class, which already got some patches mainline. This is actually quite positive information. Here we also even got tiny bits of device tree on Intel/Marvell PXA!

In parallel with NSWI075, I got involved in a project where our task was to analyze and potentially improve capabilities of Linux in certain network operation. This is where I got to taste real device tree based thing and also got a taste of PowerPC machine. The device in this case was the completely boring MPC5200-based board.

Other than university projects, firstly, I got Efika Smartbook. The device is actually very nice and interesting and I'm very happy with it. I worked on U-Boot for this thing, which still isn't quite ready. There is still a reset problem on the Smartbook, which I didn't have time to debug yet. Though with a tiny change in Linux or U-Boot, the system works fine.

Hardware-wise, there was another event where I got a new toy. That was, FOSDEM. I bought there the Ben Nanonote MIPS/JZ4740 based handheld. It's an awesome thing, but due to Operating Systems class and stuff, I wasn't able to hack on it at all.

FOSDEM though requires a special paragraph or two here. We called it a school field-trip, since the group of people I went there with were all my students from NSWI106 -- Administration of UNIX class. We met a few other friends on the airport, though the most interesting was the first evening in there. Delirium Cafe, where we had some Belgian beer, made things very interesting. So much we left the hotel the other day sometimes past noon.

When we arrived at FOSDEM, we quickly met with many well-known people. For me, it was a friend I sometimes meet even here in Prague since he's local -- Pavel Machek. As for the foreigners though, it was Hector Oron, Wookey, rtp, Loic Minier and many others from the Debian/ARM team. There were obviously many others. Lastly, I must not forget to mention that for whole that time, I had no other than ARM-based hardware with me. I had no x86 laptop with me and I had no trouble at all. As for FOSDEM, it was really enjoyable and next year I'll likely go with a bigger group of friends, but that's all.

Next important event was my visit of DENX. Meeting Wolfgang Denk, Detlev Zundel and others from that was an awesome experience. Seeing how the company works and how they work with the hardware was something awesome. Here again I saw a lot of interesting hardware and had a great time with those people.

But due to me being too busy with all the stuff happening, I got barely any time to hack on kernel. I got a few fixes in, but most of the stuff I tried pushing down on my students. I really hope I'll be able to bring in a few new kernel hackers soon.