Date: Wed, 18 Dec 1996 03:08:51 +0100 From: se@FreeBSD.ORG (Stefan Esser) To: ruey@tpts1.seed.net.tw (PC_user) Cc: freebsd-hardware@FreeBSD.ORG Subject: Re: TekrAm DC-390F scsi card Message-ID: <Mutt.19961218030851.se@x14.mi.uni-koeln.de> In-Reply-To: <199612171728.BAA24094@tpts1.seed.net.tw>; from PC_user on Dec 18, 1996 01:28:45 %2B1419 References: <199612171728.BAA24094@tpts1.seed.net.tw>
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On Dec 18, ruey@tpts1.seed.net.tw (PC_user) wrote: > Hi, > > I'm trying to get my TekrAm DC-390F (ncr53c875) work under FreeBSD. But > I always get the following message while booting > > Probing for devices on PCI bus 0: > chip0 <SiS 85c496> rev 1 on pci0:5 > de0 <Digital 21041 Ethernet> rev 17 int a irq 9 on pci0:10 > de0: 21041 [10Mb/s] pass 1.1 > de0: address 00:80:c8:34:93:bd > vga0 <VGA-compatible display device> rev 6 int a irq 9 on pci0:11 > ncr0 <ncr 53c875 wide scsi> rev 1 int a irq 10 on pci0:12 > CACHE TEST FAILED: reg dstat-sstat2 readback ffffffff. > CACHE INCORRECTLY CONFIGURED. > Probing for devices on the ISA bus: > sc0 at 0x60-0x6f irq 1 on motherboard > ... > > and the system cannot detect any scsi device. > Please tell me how to fix this problem. Could you please send VERBOSE boot messages (ie. enter "-v"- at the "Boot: " prompt). The NCR driver does some basic tests before it starts to actually initialize the controller. And the first one already failed on your system. The test writes "0xffffffff" into some NCR register, which are guaranteed to return 0 in some of their bits. If the value read back does not contain those 0 bits, then the CPU read it from its cache, not from the NCR chip (which must be memory mapped into a non-cacheable memory region). Seems that your CPU read back the 0xffff with no single bit cleared. This prevents operation of the NCR (and any other memory mapped PCI card) on your motherboard. Please send the VERBOSE boot message log. You will find lines like the following in it: ncr1 <ncr 53c875 wide scsi> rev 1 int a irq 12 on pci0:4 mapreg[10] type=1 addr=0000e400 size=0100. mapreg[14] type=0 addr=fbfde000 size=0100. mapreg[18] type=0 addr=fbfdd000 size=1000. reg20: virtual=0xf54f8000 physical=0xfbfde000 size=0x100 On my system the Tekram is mapped to address 0xfbfde000 (mapreg[14]). I've once before seen a system, whose PCI BIOS mapped some PCI chip into memory space below 1MB. It is often possible to remap any PCI device to some other unused memory address. You may try to build a kernel with NCR_IOMAPPED defined. This will make the driver use port I/O instead of memory accesses. Regards, STefan
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