My custom board (same as 9260ek) is very unstable.
While Linux is booting, (almost always) Kernel Panic occurs at calibrate_delay(). But sometimes it goes goot to 'login'.
Quote:
Starting kernel ...
Linux version 2.6.22 (fukunaga@debian-etch) (gcc version 4.3.3 (Sourcery G++ Lite 2009q1-161) ) #6 Mon Dec 21 20:59:48 JST 2009
CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177
Machine: cew Sasanqua
Memory policy: ECC disabled, Data cache writeback
Clocks: CPU 198 MHz, master 99 MHz, main 18.432 MHz
CPU0: D VIVT write-back cache
CPU0: I cache: 8192 bytes, associativity 4, 32 byte lines, 64 sets
CPU0: D cache: 8192 bytes, associativity 4, 32 byte lines, 64 sets
Built 1 zonelists. Total pages: 16256
Kernel command line: mem=64M console=ttyS0,115200 initrd=0x21100000,3145728 root=/dev/ram0 rw
AT91: 96 gpio irqs in 3 banks
PID hash table entries: 256 (order: 8, 1024 bytes)
Console: colour dummy device 80x30
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory: 64MB = 64MB total
Memory: 59008KB available (2484K code, 232K data, 112K init)
Internal error: : 1 [#1]
Modules linked in:
CPU: 0 Not tainted (2.6.22 #6)
PC is at as_antic_waitnext+0x28/0x50
LR is at calibrate_delay+0xfc/0x198
pc : [<c00ffb04>] lr : [<c00248e4>] psr: 20000053
sp : c0293fb0 ip : ffff8ae4 fp : c0293fcc
r10: 2001ea1c r9 : 41069265 r8 : 2001ea50
r7 : 00000003 r6 : 00002000 r5 : c0298e08 r4 : ffff8ae4
r3 : efec8ae4 r2 : 00078000 r1 : c0295bb4 r0 : 00079ffb
Flags: nzCv IRQs on FIQs off Mode SVC_32 Segment kernel
Control: 0005317f Table: 20004000 DAC: 00000017
Process swapper (pid: 0, stack limit = 0xc0292260)
Stack: (0xc0293fb0 to 0xc0294000)
3fa0: c02b7ab8 c02aee0c c0295d54 c02cc0a4
3fc0: c0293ff4 c0293fd0 c0008cb8 c00247f8 c00087fc 00000000 00000000 c0020f14
3fe0: 00053175 c02af320 00000000 c0293ff8 20008030 c0008aa0 00000000 00000000
Backtrace:
[<c00247e8>] (calibrate_delay+0x0/0x198) from [<c0008cb8>] (start_kernel+0x228/0x2c0)
r7:c02cc0a4 r6:c0295d54 r5:c02aee0c r4:c02b7ab8
[<c0008a90>] (start_kernel+0x0/0x2c0) from [<20008030>] (0x20008030)
r5:c02af320 r4:00053175
Code: 9a000002 e59f0024 e59f1024 ebfca54b (e59030bc)
Kernel panic - not syncing: Attempted to kill the idle task!
Please any help or advice.
Forum
. When I changed GCC version from 4.3 to 4.2, linux can boot fine!