Grant,
sorry for having troubled you. Looks like the build system has been in
an invalid state...
After doing a git-pull and "make distclean" + "make mpc5200_defconfig"
the system is finally up and running.
Using mpc5200-simple-platform machine description
Linux version 2.6.25-rc6-00978-g275c005-dirty ([EMAIL PROTECTED]) (gcc version
4.0.0 (DENX ELDK 4.1 4.0.0)) #9 Tue Mar 18 11:25:07 CET 2008
Found initrd at 0xc397a000:0xc3c00000
arch/powerpc/platforms/52xx/mpc52xx_common.c: Error mapping XLB in
mpc52xx_setup_cpu(). Expect some abnormal behavior
Zone PFN ranges:
DMA 0 -> 16384
Normal 16384 -> 16384
Movable zone start PFN for each node
early_node_map[1] active PFN ranges
0: 0 -> 16384
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16256
Kernel command line: root=/dev/ram ro rootfstype=squashfs
ip=192.168.65.57::192.168.65.15:255.255.255.0 console=ttyPSC0,115200N8
e1000.TxDescriptors=1500 e1000.SmartPowerDownEnable=1
MPC52xx PIC is up and running!
PID hash table entries: 256 (order: 8, 1024 bytes)
clocksource: timebase mult[79364d9] shift[22] registered
console [ttyPSC0] enabled
....
regards,
Andre
Andre Schwarz schrieb:
Grant,
I've pulled the latest git and built a mpc5200_simple system with a
minimal dts.
There's not a single char put on the console ....
Grant Likely schrieb:
On Sun, Mar 16, 2008 at 1:15 PM, André Schwarz
<[EMAIL PROTECTED]> wrote:
All,
I'm quite stuck in getting our MPC5200B based systems work on 2.6.24+
... maybe someone could give me some hints.
Up to now the systems have been running on 2.6.19 without any problems.
This is what I've done so far :
- get a recent system with 2.6.19 running and keep the toolchain (gcc
4.0) including RFS uImage.
- latest bootloader (u-boot 1.3.2) is running fine with dtb support.
- Kernel and RFS images are available via bootp/tftp
- device tree blob seems ok, i.e. u-boot can display the blob and fill
in all clocks correctly.
- Kernel gets called with Kernel, RFS and dtb on suitable adresses
(0x100000, 0x600000, 0x5F0000).
- nothing more happens. It looks like the console isn't working properly
- maybe worse ...
Can you either halt the processor or reset the board and access memory
after this point? You should see if you can access __log_buf (Look in
System.map for the address and subtract 0xc0000000 to get the physical
address). __log_buf should give you clues about how far booting
progresses.
(c033d4b4 b __log_buf) yields all zeroes - nothing logged at all.
Examining the CPU state with the bdi shows :
Target CPU : MPC8280/8220/5200 (Zeppo)
Target state : debug mode
Debug entry cause : COP halt
Current PC : 0xc000552c
Current CR : 0x48000042
Current MSR : 0x00009032
Current LR : 0xc00166c0
The program counter shows the adress of "irq_set_virq_count" which has
a BUG() macro. Looks like this one evaluates to true.
What do you think ?
The kernel has been build using the "MPC5200 simple" setup. I've added
our board identifier "mv,mvbluecougar" to the list of supported boards
in the "mpc52xx_simple.c" file. This identifier is used in the dtb as
well of course. This should be enough along with a valid device tree
blob, isn't it ? Did I miss anything already ?
Yes, this should be enough (on a side note; it should probably be
"matrix-vision,bluecougar" unless of''mv' is your company's stock
ticker symbol).
As far as I did understand by reading the docs it should be possible
running a general MPC52xx kernel with a custom dtb ? Is this correct ?
That is correct.
The dts file has already been reduced to a minimum, i.e. only the cpu,
pic, xlb and a few nodes like psc1 and psc2 are present. No bestcomm,
pci, ata or "advanced" features like mtd partitions. All I want to get
working is the serial console on "/dev/ttyPSC0".
Cheers,
g.
regards,
Andre
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