From: Rupesh S <rupesh.sugathan@gmail.com>
To: linuxppc-embedded@ozlabs.org
Subject: PPC kernel hangs
Date: Tue, 12 Oct 2004 14:24:50 -0700 [thread overview]
Message-ID: <1e44ebcf04101214247d3072b6@mail.gmail.com> (raw)
Hi,
To perform a Memory Mapped access of a device, I setup the OR and BR
registers in the bootloader (u-boot). I am able to read and write to
the device being in the u-boot prompt. However, when I try to access
the device after the Linux kernel boots up (say, in a driver), it
gives me a exception message as follows.
#################################################################
enabl0004, DSISR: 00000063
TASK = c3ef4000[18] 'insmod' Last syscall: 128
last math 00000000 last altivec 00000000
GPR00: C60B0338 C3EF5E50 C3EF4000 60000004 00001032 00000001 C018009E C60B0000
GPR08: C60B0BB8 C60B085C C60B0BBC C60B0000 C0180000 10056374 00000000 00000000
3
TASK = c3ef4000[18] 'insmod' Last syscall: 128
last math 00000000 last altivec 00000000
GPR00: C60B0338 C3EF5E50 C3EF4000 60000004 00001032 00000001 C018009E C60B0000
GPR08: C60B0BB8 C60B085C C60B0BBC C60B0000 C0180000 10056374 00000000 00000000
GPR16: 00000000 00000000 00000000 00000000 00009032 C3EF5E98 10064EBC C3E2C000
GPR24: C02EEA80 00000008 C60B2000 00000060 FFFFFFEA 00000000 C60B0000 C60B0000
Call backtrace:
00000000 C60B0338 C0014DE4 C000447C 10050000 1000B27C 1000C344
10003CBC 100038C8 0FE70E88 00000000
#################################################################
My platform is MPC880 Processor.
Do I need to setup something more in the kernel?
--
Rupesh S
next reply other threads:[~2004-10-12 21:31 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-12 21:24 Rupesh S [this message]
2004-10-12 21:36 ` PPC kernel hangs Eugene Surovegin
2004-10-12 23:03 ` Jon Masters
2004-10-12 23:05 ` Jon Masters
2004-10-12 23:34 ` Eugene Surovegin
2004-10-13 18:00 ` Jon Masters
2004-10-14 16:44 ` Rupesh S
2004-10-14 21:23 ` Jon Masters
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