Hi Scott:<br>
<br>
After enabling debugging option from kernel (2.6.29) , here is the log.<br>
<br>
We do have an external debugger(BDI). But soon after the crash happens,
looks like the core freezes and hence reading from any location in
memeory gives "SAP: Read access failed" error.<br>
<br>
I have disabled PCI. <br>
<br>
--Thanks,<br>
Junita<br>
<br>
Screen-dump :<br>
===========<br>
Bytes transferred = 12288 (3000 hex)<br>
SC3000> bootm 0x00600000 - 0x00900000<br>
## Booting image at 00600000 ...<br>
Image Name: Linux-2.6.29<br>
Created: 2009-12-11 2:59:37 UTC<br>
Image Type: PowerPC Linux Kernel Image (gzip compressed)<br>
Data Size: 2177151 Bytes = 2.1 MB<br>
Load Address: 00000000<br>
Entry Point: 00000000<br>
Verifying Checksum ... OK<br>
Uncompressing Kernel Image ... OK<br>
Booting using the fdt at 0x900000<br>
Loading Device Tree to 007fc000, end 007fefff ... OK<br>
Using MPC834x ITX machine description<br>
Linux version 2.6.29 (root@localhost.localdomain) (gcc version 4.1.2) #1 Thu De9console [udbg0] enabled<br>
setup_arch: bootmem<br>
mpc834x_itx_setup_arch()<br>
Found FSL PCI host bridge at 0x00000000e0008600. Firmware bus number: 1->1<br>
PCI host bridge /pci@e0008600 ranges:<br>
MEM 0x00000000a0000000..0x00000000afffffff -> 0x00000000a0000000 Prefetch<br>
MEM 0x00000000b0000000..0x00000000bfffffff -> 0x00000000b0000000<br>
IO 0x00000000e3000000..0x00000000e3ffffff -> 0x0000000000000000<br>
arch: exit<br>
Zone PFN ranges:<br>
DMA 0x00000000 -> 0x00008000<br>
Normal 0x00008000 -> 0x00008000<br>
HighMem 0x00008000 -> 0x00008000<br>
Movable zone start PFN for each node<br>
early_node_map[1] active PFN ranges<br>
0: 0x00000000 -> 0x00008000<br>
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 32512<br>
Kernel command line: root=/dev/ram rw console=ttyS0,115200 mem=128M<br>
IPIC (128 IRQ sources) at fe7fc700<br>
BUG: spinlock bad magic on CPU#0, swapper/0<br>
lock: c041c3b8, .magic: dead4ead, .owner: <none>/-1, .owner_cpu: -1<br>
Call Trace:<br>
[c0449db0] [c0008990] show_stack+0x3c/0x160 (unreliable)<br>
[c0449de0] [c01fced8] spin_bug+0x8c/0xd0<br>
[c0449e00] [c01fd0e0] _raw_spin_lock+0x94/0x16c<br>
[c0449e30] [c02bcef0] _spin_lock_irqsave+0x20/0x38<br>
[c0449e50] [c004ea4c] down_trylock+0x18/0x4c<br>
[c0449e60] [c0032650] try_acquire_console_sem+0x20/0x7c<br>
[c0449e70] [c0032de0] vprintk+0x148/0x3a4<br>
[c0449f20] [c003308c] printk+0x50/0x60<br>
[c0449f60] [c03f4e98] ipic_init+0x17c/0x180<br>
[c0449fa0] [c03fa7dc] mpc834x_itx_init_IRQ+0x2c/0x40<br>
[c0449fb0] [c03ebee8] init_IRQ+0x24/0x34<br>
[c0449fc0] [c03e570c] start_kernel+0x158/0x2b4<br>
[c0449ff0] [00003438] 0x3438<br>
PID hash table entries: 512 (order: 9, 2048 bytes)<br>
time_init: decrementer frequency = 66.666666 MHz<br>
time_init: processor frequency = 399.999996 MHz<br>
clocksource: timebase mult[3c00001] shift[22] registered<br>
clockevent: decrementer mult[1111] shift[16] cpu[0]<br>
Console: colour dummy device 80x25<br>
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)<br>
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)<br>
High memory: 0k<br>
Memory: 124912k/131072k available (4188k kernel code, 6008k reserved,
192k data)SLUB: Genslabs=12, HWalign=32, Order=0-3, MinObjects=0,
CPUs=1, Nodes=1<br>
Calibrating delay loop... 133.12 BogoMIPS (lpj=266240)<br>
Mount-cache hash table entries: 512<br>
khelper used greatest stack depth: 7656 bytes left<br>
Unable to handle kernel paging request for data at address 0xffff3f60<br>
Faulting instruction address: 0xc005e984<br>
Oops: Kernel access of bad area, sig: 11 [#1]<br>
MPC834x ITX<br>
NIP: c005e984 LR: c005eae8 CTR: c005eb48<br>
REGS: c781dd00 TRAP: 0300 Not tainted (2.6.29)<br>
MSR: 00009032 <EE,ME,IR,DR> CR: 22000088 XER: 00000000<br>
DAR: ffff3f60, DSISR: 20000000<br>
TASK = c7818000[1] 'swapper' THREAD: c781c000<br>
GPR00: c005eae8 c781ddb0 c7818000 ffff3f60 c03c1300 fffedb2b 00000100 00000000<br>
GPR08: c0427c84 ffff3f60 00000001 c0440000 42000084 ffffffff 0fff7000 00800000<br>
GPR16: ffffffff 00000000 007fff00 00000000 00000001 c0470000 c0478d1c c03a0000<br>
GPR24: 00000001 c0470000 0000000a c781c000 00009032 00000000 c0478ce0 c0427c64<br>
NIP [c005e984] __rcu_process_callbacks+0x12c/0x2f0<br>
LR [c005eae8] __rcu_process_callbacks+0x290/0x2f0<br>
Call Trace:<br>
[c781ddb0] [c005eae8] __rcu_process_callbacks+0x290/0x2f0 (unreliable)<br>
[c781ddd0] [c005eb68] rcu_process_callbacks+0x20/0x44<br>
[c781dde0] [c0038244] __do_softirq+0x90/0x140<br>
[c781de20] [c0006534] do_softirq+0x58/0x5c<br>
[c781de30] [c00380a0] irq_exit+0x48/0x58<br>
[c781de40] [c0010e64] timer_interrupt+0x12c/0x188<br>
[c781de60] [c0014484] ret_from_except+0x0/0x14<br>
--- Exception: 901 at udbg_550_putc+0x1c/0x58<br>
LR = udbg_puts+0x48/0x6c<br>
[c781df20] [00000000] (null) (unreliable)<br>
[c781df30] [c03ee80c] udbg_progress+0x14/0x30<br>
[c781df40] [c03ee8f8] ppc_init+0x3c/0x68<br>
[c781df50] [c0003884] do_one_initcall+0x34/0x1a8<br>
[c781dfd0] [c03e516c] kernel_init+0x94/0xf8<br>
[c781dff0] [c0013c10] kernel_thread+0x4c/0x68<br>
Instruction dump:<br>
39200000 901e0008 913e0004 801f0000 901e0000 807e0024 2f830000 419e0090<br>
7c691b78 3ba00000 48000008 41920038 <83e90000> 2e1f0000 41920008 7c00fa2c<br>
Kernel panic - not syncing: Fatal exception in interrupt<br>
<br>
<br>
<br>
<br><br><div><span class="gmail_quote">On 12/11/09, <b class="gmail_sendername">Scott Wood</b> <<a href="mailto:scottwood@freescale.com">scottwood@freescale.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<span class="q">Junita Ajith wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi Scott:<br>
<br>
I am still stuck at Linux kernel booting in MPC8343EA based board.<br>
<br>
I have disabled "Ethernet, PCI, USB, dma engines " in the *.dts file and also in the kernel config.<br>
I am using MPC8349emitxgp.dts ; enabled MPC8349ITX support in
kernel config also. In fact, I tried building MPC8349emITX; MPC8349MDS
also. Same behaviour!<br>
<br>
With this, the kernel boots up (explicitly passing the DTB file and cuImage NEVER worked) and hangs after<br>
<br>
I am using Linux-V-2.6.27.18 and using powerpc-e300c3-gnu
toolchain - gcc-4.1.69-eglibc-2.5.69-1 to build
u-boot-1.3.2 & linux.<br>
<br>
With this, the kernel boots up (explicitly passing the DTB file and cuImage NEVER worked) and hangs after printing<br>
"Calibrating delay loop... 133.12 BogoMIPS (lpj=266240)"<br>
<br>
With a few debug printks looks like the kernel hangs in<br>
"cpu_idle" in --main/init.c<br>
</blockquote>
<br></span>
Try to find out what threads are blocked where.<br>
<br>
There may also have been a problem transitioning to the normal serial
driver. Do you have an external debugger than can extract the log
buffer?<br><span class="sg">
<br>
-Scott<br>
</span></blockquote></div><br>