From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <40F541AC.1090501@bluewin.ch> Date: Wed, 14 Jul 2004 16:22:36 +0200 From: Wolfgang Grandegger MIME-Version: 1.0 To: hu Cc: linuxppc-dev Subject: Re: Oops:kernel access of bad areasig:11 References: <20040714053136.86F102F86F@smtp.263.net> In-Reply-To: <20040714053136.86F102F86F@smtp.263.net> Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: On 07/14/2004 07:33 AM hu wrote: > 1)environment > Linux kernel 2.4.4-rthal5 > ppcboot 1.1.5 > MPC823 board > > 2)I'm running a device driver which read data from touchpanel which use SIU_IRQ2, but I often get message like that: > Oops: kernel access of bad area, sig: 11 > NIP: C000C4E8 XER: C000206F LR: C000C4E0 SP: C07FBEF0 REGS: c07fbe40 TRAP: 0300 > MSR: 00009032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11 > DAR: 00000004,DISR: 0000013C > last math 00000000 last altivec 00000000 > GPR00: 00000002 C07FBEF0 C07FA000 C07FBF08 00009032 C0C09E58 C0C08000 00000020 > GPR08: C01A9138 C0195364 C0C08000 C07FBF30 2F7B6A70 1007C2B8 40024400 00000000 > GPR16: 00000000 00000000 00000000 00000000 00000000 00003400 00580000 00002C7E > GPR24: 00000000 0001C200 00000001 C07FBEF8 00000000 C07FBF00 00664BDA C07FBEF0 > > Call backtrace: > C000C468 C002B440 C0004DA8 > > 3) I look through past document in linux-embedded, and I check /arch/ppc/kernel/m8xx_setup.c, it exists: > fp = binfo->bi_intfreq * 1000000 / 16; > and /arch/ppc/8xx_io/commproc.c, it exits: > #define BRG_INT_CLK (((bd_t *)__res)->bi_intfreq * 1000000 ) It's difficult to guess from your input what might provoke the error. Here are few more questions: - Does the same problem show up with the stanndard (non-RTAI) kernel? - Is RTAI running, e.g. RTAI modules loaded? - Have you tried to interpret the backtrace? And if it really has to do with RTAI, then you are off-topic on this list. Wolfgang. ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/