On 2002.08.23 10:09 Wolfgang Denk wrote: > In message <20020823095133.F12271 at zambia.cambridgebroadband.com> you > wrote: > > > > Here's my Oops: > > > > > > Oops: kernel access of bad area, sig: 11 > > NIP: C00C0A0C XER: C000037F LR: C00C0A00 SP: C1763460 REGS: c17633b0 > > TRAP: 0300 > > MSR: 00009032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11 > > DAR: 40009E9A, DSISR: 00000409 > > TASK = c1762000[117] 'cardmgr' Last syscall: 54 last math 00000000 > last > > altivec 00000000 > > GPR00: C00C0A00 C1763460 C1762000 00009B78 000000EC 00000000 > C01C838C > > C0009E9A GPR08: 00009032 40009E9A C0009E9A C01C8360 53935E95 > 1002205C > > 00000000 100B9E90 GPR16: 100BA770 00000001 007FFF00 00000000 > C17636D8 > > C1C9D670 00000002 C4040000 GPR24: C4040000 0000010E 00000100 > C01C84B8 > > 00000000 00000000 C01C83C8 000000EC Call backtrace: C00C0A00 > C00C0F04 > > C00C10EC C00C188C C00C221C C00BBFD4 C00BCAAC C00BCB4C C403F7A4 > C403FBE0 > > C40031BC C4004808 C403F18C C400F874 C40105B4 C00435C8 C000259C > 10002BAC > > 100032C0 10004764 0FED9DBC 00000000 > > > > Does this look familiar? :-/ > > Alex, I guess Steven was more interested in the _decoded_ output of > the stack backtrace. >
Yes, of course. The crash occurs in the ide_cs client. The order of calls is: (CARD INSERTION) -> ide_event() -> ide_config() -> ide_register(). The crash occurs somewhere in ide_register(), but I find reading through that code a bit hairy as I don't really know anything about IDE myself. I suspect that I've got a problem with byte ordering. This would explain the problem I get when I insert an ethernet card. When I do this, the client 3c574_cs tries to write a command to a register on the card, and read another register to determine when the command has been completed - however, this never happens. This could be a result of performing reads and writes in the wrong order. In Magnus' email (http://lists.linuxppc.org/linuxppc-embedded/200005/msg00227.html) he talks about Endianness. However, I've been through the source files he talks about (my kernel is linux-2.4.4-2001-11-24) and all of the changes he refers to are already there. Any ideas? Alex > Wolfgang Denk > > -- > Software Engineering: Embedded and Realtime Systems, Embedded Linux > Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de > The software required `Windows 95 or better', so I installed Linux. > ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
