Date: Wed, 01 May 2013 08:54:55 -0600 From: Ian Lepore <ian@FreeBSD.org> To: Jakob Alvermark <jakob@alvermark.net> Cc: freebsd-arm@FreeBSD.org Subject: Re: Allwinner A13: Fatal kernel mode data abort: 'Translation Fault (S)' Message-ID: <1367420095.1180.68.camel@revolution.hippie.lan> In-Reply-To: <63837.85.229.93.125.1367417396.squirrel@alvermark.net> References: <63837.85.229.93.125.1367417396.squirrel@alvermark.net>
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On Wed, 2013-05-01 at 16:09 +0200, Jakob Alvermark wrote: > Hi again, > > In my effort to get FreeBSD running on the A13 I got a little further, > however not quite so far as I was hoping for. > > Any clues on this? > > Jakob > > sun5i#go 0x40200100 > ## Starting application at 0x40200100 ... > KDB: debugger backends: ddb > KDB: current backend: ddb > Copyright (c) 1992-2013 The FreeBSD Project. > Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 > The Regents of the University of California. All rights reserved. > FreeBSD is a registered trademark of The FreeBSD Foundation. > FreeBSD 10.0-CURRENT #0 r250141M: Wed May 1 14:15:44 CEST 2013 > root@test10:/home/jakob/a13-gonzo/obj/arm.armv6/usr/src/sys/A13 arm > FreeBSD clang version 3.3 (trunk 178860) 20130405 > WARNING: WITNESS option enabled, expect reduced performance. > CPU: Cortex A8-r3 rev 2 (Cortex-A core) > Supported features: ARM_ISA THUMB2 JAZELLE THUMBEE ARMv4 Security_Ext > WB disabled EABT branch prediction enabled > LoUU:2 LoC:2 LoUIS:1 > Cache level 1: > 32KB/64B 4-way data cache WT WB Read-Alloc > 32KB/64B 4-way instruction cache Read-Alloc > Cache level 2: > 256KB/64B 8-way unified cache WT WB Read-Alloc Write-Alloc > real memory = 536870912 (512 MB) > avail memory = 511303680 (487 MB) > random device not loaded; using insecure entropy > simplebus0: <Flattened device tree simple bus> on fdtbus0 > a13_ccm0: <Allwinner Clock Control Module> mem 0x1c20000-0x1c203ff on > simplebus0 > a13_timer0: <Allwinner A13 timer> mem 0x1c20c00-0x1c20c8f irq 22 on > simplebus0 > > vm_fault(0xc0716ff8, 0, 1, 0) -> 1 > Fatal kernel mode data abort: 'Translation Fault (S)' > trapframe: 0xc072aad4 > FSR=00000005, FAR=00000008, spsr=a00000d3 > r0 =00000000, r1 =00000004, r2 =00000001, r3 =c2f93b48 > r4 =00000120, r5 =00000040, r6 =c30ac500, r7 =00000000 > r8 =c0716508, r9 =00000000, r10=00000016, r11=c072ab40 > r12=c0716da4, ssp=c072ab20, slr=c04b0c64, pc =c04c013c > > [ thread pid 0 tid 100000 ] > Stopped at arm_unmask_irq+0x24: ldr r2, [r0, #0x008] > db> It looks like the timer driver tried to set up interrupts before the interrupt controller driver had attached. The arm_unmask_irq() routine tried to dereference a NULL pointer, I'm thinking from where it died it was a10_aintc_sc. -- Ian
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