Date: Sat, 21 May 2011 01:34:02 +0200 From: Damjan Marion <damjan.marion@gmail.com> To: freebsd-arm@freebsd.org, freebsd-hackers@freebsd.org Subject: vm_fault when accessing PCI address space Message-ID: <D209676D-CDA8-4490-8965-86488C41D404@gmail.com>
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Hi, I'm made some progress on porting existing marvell orion ARM code to work on 88F5181L SoC which have embedded PCI controller. PCI driver detects resources and recognizes Atheros wlan card, however when driver tries to access 1st register with bus_space_write_4 vm_fault happens: vm_fault(0xc0e4f000, e8007000, 2, 0) -> 1 Fatal kernel mode data abort: 'Translation Fault (S)' trapframe: 0xc0d3faa4 FSR=00000005, FAR=e800704c, spsr=600000d3 r0 =00000000, r1 =e8000000, r2 =0000704c, r3 =00000003 r4 =c13cd000, r5 =c0c4bd60, r6 =c0bece04, r7 =c12dd000 r8 =00000023, r9 =c0d074c8, r10=c0d3fba4, r11=c0d3fb00 r12=00000000, ssp=c0d3faf0, slr=c095f830, pc =c0bece04 [ thread pid 0 tid 100000 ] Stopped at generic_bs_w_4: str r3, [r1, r2] 0xe8000000 is PCI mem space. I can see that PCI driver (mv_pci.c) allocates this resource: pcib0: <Marvell Integrated PCI/PCI-E Controller> mem 0xf1030000-0xf1031fff irq 0 on fdtbus0 pci0: <PCI bus> on pcib0 mv_pcib_alloc_resource: start=0xe8000000 end=0xe800ffff count=0x00010000 flags=0x00 What can be the reason for this vm_fault? Thanks for any hint or idea, Damjan
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