[2.6.29] MPC8560 Powerpc Port linux-2.6.29

[Deepak Gaur]

Hello all

I have a custom board with MPC8560 and 1GB DDR SDRAM. I am trying to port linux - 2.6.29
on this board. The U-BOOT is already ported on the board and is working.

The OS uImage is stored in code flash at address 0xe0000000 and OS is booted by U-BOOT 
While OS do boot but after some prints weired errors start showing up. Rootfile system
is NFS based . I have checked the register values with Hardware person using Trace32
emulator and they are as expected.

----------------------------------------------------------------------------------------
FLASH: 32.5 MB
L2:    256 KB enabled
In:    serial
Out:   serial
Err:   serial
Net:   TSEC1, TSEC2
Hit any key to stop autoboot:  0
WARNING: adjusting available memory to 30000000
## Booting kernel from Legacy Image at e0000000 ...
   Image Name:   Linux-2.6.29
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    1451400 Bytes =  1.4 MB
   Load Address: 00400000
   Entry Point:  004005a8
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
Using MPC85xx ADS machine description
Memory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=256Mb residual: 256Mb
Linux version 2.6.29 (deepak at Localhost) (gcc version 3.4.3 (MontaVista
3.4.3-25.0.96.0600665 2006-05-179Found FSL PCI host bridge at 0x00000000a0008000.
Firmware bus number: 0->0
PCI host bridge /pci at a0008000 (primary) ranges:
 MEM 0x0000000080000000..0x000000009fffffff -> 0x0000000080000000
  IO 0x00000000a2000000..0x00000000a2ffffff -> 0x0000000000000000
Zone PFN ranges:
  DMA      0x00000000 -> 0x00030000
  Normal   0x00030000 -> 0x00030000
Movable zone start PFN for each node
early_node_map[1] active PFN ranges
    0: 0x00000000 -> 0x00030000
MMU: Allocated 1088 bytes of context maps for 255 contexts
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 195072
Kernel command line: console=ttyCPM0,9600 root=/dev/nfs rw nfsroot=rootpath ip=dhcp
mpic: Setting up MPIC " OpenPIC  " version 1.2 at a0040000, max 1 CPUs
mpic: ISU size: 56, shift: 6, mask: 3f
mpic: Initializing for 56 sources
PID hash table entries: 4096 (order: 12, 16384 bytes)
clocksource: timebase mult[79364d9] shift[22] registered
console [ttyCPM0] enabled
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
BUG: Bad page state in process swapper  pfn:2fc69
page:c0d0ed20 flags:(null) count:0 mapcount:-524288 mapping:(null) index:0
Call Trace:
[c02dbef0] [c0007a84] show_stack+0x48/0x174 (unreliable)
[c02dbf20] [c006fa14] bad_page+0x9c/0x160
[c02dbf40] [c0071564] __free_pages_ok+0x2c8/0x3a8
[c02dbf70] [c02a9788] free_all_bootmem_core+0x1a4/0x240
[c02dbfa0] [c02a4544] mem_init+0x64/0x178
[c02dbfc0] [c029a67c] start_kernel+0x1d0/0x2a8
[c02dbff0] [c00003b4] skpinv+0x2dc/0x318
BUG: Bad page state in process swapper  pfn:2fc8f
page:c0d0f1e0 flags:(null) count:0 mapcount:7799008 mapping:(null) index:0
Call Trace:
[c02dbef0] [c0007a84] show_stack+0x48/0x174 (unreliable)
[c02dbf20] [c006fa14] bad_page+0x9c/0x160
[c02dbf40] [c0071564] __free_pages_ok+0x2c8/0x3a8
[c02dbf70] [c02a9788] free_all_bootmem_core+0x1a4/0x240
[c02dbfa0] [c02a4544] mem_init+0x64/0x178
[c02dbfc0] [c029a67c] start_kernel+0x1d0/0x2a8
[c02dbff0] [c00003b4] skpinv+0x2dc/0x318
BUG: Bad page state in process swapper  pfn:2fcc4
page:c0d0f880 flags:(null) count:0 mapcount:7799040 mapping:(null) index:0
Call Trace:
[c02dbef0] [c0007a84] show_stack+0x48/0x174 (unreliable)
[c02dbf20] [c006fa14] bad_page+0x9c/0x160
[c02dbf40] [c0071564] __free_pages_ok+0x2c8/0x3a8
[c02dbf70] [c02a9788] free_all_bootmem_core+0x1a4/0x240
[c02dbfa0] [c02a4544] mem_init+0x64/0x178
[c02dbfc0] [c029a67c] start_kernel+0x1d0/0x2a8
[c02dbff0] [c00003b4] skpinv+0x2dc/0x318
BUG: Bad page state in process swapper  pfn:2fce8
--------------------------------------------------------------------------------------

Can anyone kindly help me in understanding the issue.

with regards,

Deepak Gaur
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Deepak Gaur