Date: Thu, 22 Jan 1998 23:37:03 -0800 From: Donald Acton <acton@opentext.com> To: Greg Lehey <grog@lemis.com> Cc: Donald Acton <acton@opentext.com>, freebsd-questions@FreeBSD.ORG, acton@vn.opentext.com, acton@stoner.nsg.bc.ca Subject: Re: DMA beyond end of ISA in 3.0 Message-ID: <199801230737.XAA13973@stoner.nsg.bc.ca> In-Reply-To: Your message of "Fri, 23 Jan 1998 17:52:04 %2B1030." <19980123175204.39831@lemis.com>
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Greg Lehay responded with >This is probably because your kernel is built without the line > >options BOUNCE_BUFFERS #include support for DMA bounce buffers > >You need these with ISA DMA devices like your Adaptec 154x if you have >more than 16 MB memory. > I should have mentioned that this problem occurs with the kernel on the boot floppies shipped with the various releases, and with the kernel's I have built. Here is a copy of the kernel configuration file I have been using. Donald machine "i386" cpu "I386_CPU" cpu "I486_CPU" cpu "I586_CPU" ident Comox maxusers 10 options INET #InterNETworking options FFS #Berkeley Fast Filesystem options NFS #Network Filesystem options MSDOSFS #MSDOS Filesystem options "CD9660" #ISO 9660 Filesystem options PROCFS #Process filesystem options "COMPAT_43" #Compatible with BSD 4.3 [KEEP THIS!] options SCSI_DELAY=15 #Be pessimistic about Joe SCSI device options BOUNCE_BUFFERS #include support for DMA bounce buffers options UCONSOLE #Allow users to grab the console options FAILSAFE #Be conservative options USERCONFIG #boot -c editor options VISUAL_USERCONFIG #visual boot -c editor options SYSVSHM options SYSVSEM options SYSVMSG options "MD5" config kernel root on wd0 controller isa0 controller eisa0 controller pci0 controller fdc0 at isa? port "IO_FD1" bio irq 6 drq 2 vector fdintr disk fd0 at fdc0 drive 0 disk fd1 at fdc0 drive 1 tape ft0 at fdc0 drive 2 options "CMD640" # work around CMD640 chip deficiency controller wdc0 at isa? port "IO_WD1" bio irq 14 vector wdintr disk wd0 at wdc0 drive 0 controller wdc1 at isa? port "IO_WD2" bio irq 15 vector wdintr disk wd2 at wdc1 drive 0 disk wd3 at wdc1 drive 1 # A single entry for any of these controllers (ncr, ahb, ahc, amd) is # sufficient for any number of installed devices. options "TUNE_1542" controller aha0 at isa? port "IO_AHA0" bio irq ? drq 5 vector ahaintr controller scbus0 device sd0 device st0 device cd0 #Only need one of these, the code dynamically grows # syscons is the default console driver, resembling an SCO console device sc0 at isa? port "IO_KBD" tty irq 1 vector scintr # Enable this and PCVT_FREEBSD for pcvt vt220 compatible console driver #device vt0 at isa? port "IO_KBD" tty irq 1 vector pcrint #options XSERVER # support for X server #options FAT_CURSOR # start with block cursor # If you have a ThinkPAD, uncomment this along with the rest of the PCVT lines #options PCVT_SCANSET=2 # IBM keyboards are non-std device npx0 at isa? port "IO_NPX" irq 13 vector npxintr # # Laptop support (see LINT for more options) # #controller card0 #device pcic0 at card? #device pcic1 at card? device sio0 at isa? port "IO_COM1" flags 0x10 tty irq 4 vector sioin tr device sio1 at isa? port "IO_COM2" tty irq 3 vector siointr device sio2 at isa? disable port "IO_COM3" tty irq 5 vector siointr device sio3 at isa? disable port "IO_COM4" tty irq 9 vector siointr device lpt0 at isa? port? tty irq 7 vector lptintr device lpt1 at isa? port? tty # Order is important here due to intrusive probes, do *not* alphabetize # this list of network interfaces until the probes have been fixed. # Right now it appears that the ie0 must be probed before ep0. See # revision 1.20 of this file. device ed0 at isa? port 0x300 net irq 10 iomem 0xcc000 vector edintr device ie0 at isa? port 0x300 net irq 10 iomem 0xd0000 vector ieintr pseudo-device loop pseudo-device ether pseudo-device ppp 1 pseudo-device tun 2 pseudo-device pty 16 pseudo-device gzip # Exec gzipped a.out's pseudo-device vn pseudo-device bpfilter 2 # KTRACE enables the system-call tracing facility ktrace(2). # This adds 4 KB bloat to your kernel, and slightly increases # the costs of each syscall. options KTRACE #kernel tracing # This provides support for System V shared memory. # options SYSVSHM
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