[Skyeye-developer] Problems with custom compiled blackfin uClinux image

[Paulo Silva]

Sires,

I am trying to boot a customized compiled uClinux image for Blackfin
processor in the skyeye emulator,
but I'm having problems loading the file system, after the system boot.

I need to know if my compilation is wrong (I don't have a Blackfin board
available right now to test this assumption)
of if there is some special option on compilation to enable the system
loading in skyeye.

The boot message I get is shown below:

=====

big_endian is false.
arch: blackfin
mach info: name bf533, mach_init addr 0x8097a80
uart_mod:0, desc_in:, desc_out:, converter:
exec file "images/linux"'s format is elf32-little.
load section .text: addr = 0x00001000  size = 0x000acce8.
load section .init: addr = 0x000adce8  size = 0x0000a6c4.
load section .text_l1: lma = 0x000b83ac (vma = 0xffa00000)  size =
0x000000cc.
not load section .data_l1: addr = 0xff800000  size = 0x00000000 .
load section .data: addr = 0x000b8478  size = 0x00023568.
not load section .bss: addr = 0x000db9e0  size = 0x00013048 .
not load section .comment: addr = 0x00000000  size = 0x00002d5a .
load section .romfs: addr = 0x000eea28  size = 0x00800000.
call ARMul_InitSymTable,kernel filename is images/linux.
start addr is set to 0x00001000 by exec file.
Linux version 2.6.12.1-BFIN-2005R4 (paulo at m01sys052xp) (gcc version 3.4.4
(Blackfin 05R4 20051205)) #12 Thu Apr 17 15:45:35 BRT 2008
Blackfin support (C) 2004 Analog Devices, Inc.
ADSP-BF533 Rev. 0.0
Warning: Unsupported Chip Revision ADSP-BF533 Rev. 0.0 detected
uClinux/BF533
Blackfin uClinux support by blackfin.uclinux.org
Processor Speed: 110 MHz core clock and 22 Mhz System Clock
Board Memory: 128MB
Memory map:
  text = 0x001000-0x0adce8
  data = 0x0b8478-0x0db9e0
  bss  = 0x0db9e0-0x0eea28
  rootfs = 0x8000000-0x8000000
  stack = 0x0ba000-0x0bc000
Hardware Trace Enabled
Built 1 zonelists
Kernel command line:
Configuring Blackfin Priority Driven Interrupts
PID hash table entries: 1024 (order: 10, 16384 bytes)
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Physical pages: 8000
Memory available: 128768k/130334k RAM, (40k init code, 691k kernel code,
217k data, 0k dma)
Blackfin Scratchpad data SRAM: 4 KB
Blackfin DATA_A SRAM: 32 KB
Blackfin DATA_B SRAM: 32 KB
Security Framework v1.0.0 initialized
Capability LSM initialized
Mount-cache hash table entries: 512
Linux NoNET1.0 for Linux 2.6
Blackfin DMA Controller for BF533
stamp_init(): registering device resources
Real Time Clock Driver v1.10e
blackfin_dpmc_init
Dynamic Power Management Controller: major=10, minor = 254
DPMC Driver v0.1
BlackFin BF533 serial driver version 2.00 With DMA Support
io scheduler noop registered
io scheduler cfq registered
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
VFS: Cannot open root device "<NULL>" or unknown-block(0,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(0,0)

==X==

I've realized in this dump two strange things. First, in the Memory map, the
rootfs block begins and ends at the 0x8000000 address,
which turns it to 0 (ZERO) size. Second, the "root=" boot option (the system
cannot load the "<NULL>" root device).

I suppose if I correct these two problems, I can load the system on skyeye,
but I can't find any uClinux build option
(given by "make menuconfig") that configures system boot options, nor I can
find how to set the rootfs image address. I know,
only, how to define the file or directory that contains the rootfs model
structure.

Anyone can help me?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.gro.clinux.org/pipermail/skyeye-developer/attachments/20080417/fbe0bc9c/attachment.htm