Date: Sat, 19 Jun 2010 16:01:32 -0700 (PDT) From: tom armistead <tom.armistead@yahoo.com> To: Nathan Whitehorn <nwhitehorn@freebsd.org> Cc: freebsd-ppc@freebsd.org Subject: Re: IMAC G3 (700Mhz) 7.2 & 8.0 install fails with "fatal kernel trap:" Message-ID: <925747.73385.qm@web58104.mail.re3.yahoo.com>
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Thanks -- I've now tried 8.1 RC1 and found it failed in the same way. There are no messages from the kernel prior to the fatal kernel trap message. I did some investigation... The failure messages displayed with the 8.1 RC1 install attempt are: fatal kernel trap: exception = 0x4 (instruction storage trap) virtual address = 0x59f3e8 srr0 = 0x59f3e8 srr1 = 0x8003030 lr = 0x5c27bc curthread =0x83fb50 pid = 0, com = panic: instruction storage trap Uptime: 1s I disassembled the kernel and it looks like the failing address is in the subroutine moea_bootstrap(). 59f3d8: 60 00 00 00 nop 59f3dc: 60 00 00 00 nop 59f3e0: 7d 30 83 a6 mtibatu 0,r9 59f3e4: 7c 11 83 a6 mtibatl 0,r0 59f3e8: 4c 00 01 2c isync <<<< failure address 59f3ec: 7d 38 83 a6 mtdbatu 0,r9 59f3f0: 7c 19 83 a6 mtdbatl 0,r0 And I found a previous problem report that looks like the same issue: http://lists.freebsd.org/pipermail/freebsd-ppc/2008-March/002661.html There was a fix for that issue but it looks like it doesn't work for the CPU on the 700Mhz iMAC. I think to really solve this problem, you have to shut off translation, load the BATs and then re-enable translation. When I patched in a segment of code to do just that, the kernel booted and the installer started up.home | help
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