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author | phk <phk@FreeBSD.org> | 1999-09-08 12:42:15 +0000 |
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committer | phk <phk@FreeBSD.org> | 1999-09-08 12:42:15 +0000 |
commit | 3f39c0c765fc26ab5360021ecf84d9ecfcb27d14 (patch) | |
tree | 467822be5efa12e0b744f172e2221acacae2194d /sys | |
parent | 65fb255e80438793cceabbc4e52bdc950d65f8aa (diff) | |
download | FreeBSD-src-3f39c0c765fc26ab5360021ecf84d9ecfcb27d14.zip FreeBSD-src-3f39c0c765fc26ab5360021ecf84d9ecfcb27d14.tar.gz |
Update docs for 3.3-R
OK'ed by: jkh
Diffstat (limited to 'sys')
-rw-r--r-- | sys/contrib/dev/fla/README | 157 | ||||
-rw-r--r-- | sys/contrib/dev/fla/prep.fla.sh | 3 |
2 files changed, 142 insertions, 18 deletions
diff --git a/sys/contrib/dev/fla/README b/sys/contrib/dev/fla/README index 22bdbed..413e97d 100644 --- a/sys/contrib/dev/fla/README +++ b/sys/contrib/dev/fla/README @@ -1,6 +1,6 @@ -README and FAQ for the fla driver. + README and FAQ for the fla driver. + ================================== -$FreeBSD$ [0] COPYRIGHT & LICENSE @@ -8,17 +8,23 @@ $FreeBSD$ agree to be bound by the terms of this license, please contact M-systems and make arrangements with them. -[1] Which devices are supported ? +[1] What does this driver do ? + + This driver supports up to eight M-systems DiskOnChip + devices. The driver has been tested with the following devices: DiskOnChip2000 (8, 12, 24, 32, 40, 72, 144 MB) DiskOnChipMillenium (8 MB) + DiskOnChipMillenium TSOP (8 MB) + + You can find full details, specs etc on M-systems homepage: + http://www.m-sys.com [2] Which firmware version ? - The driver has only been tested with version 1.21, but should - also work with earlier versions. + The driver has only been tested with version 1.21. [3] How many devices ? @@ -27,19 +33,16 @@ $FreeBSD$ [4] Which FreeBSD versions ? - The driver is tested for 4.0-CURRENT and 3.2-STABLE. Porting - to earlier versions of FreeBSD should be a simple matter of - modifying the fla.c file. [patches are welcome] + The driver is tested for 4.0-CURRENT and 3.3-RELEASE. - For 3.2-STABLE sources earlier than 1999-08-01 you - will need to apply the patch in file patch.00 + Porting to earlier versions of FreeBSD should be a simple + matter of modifying the fla.c file. [patches are welcome] [5] Can I install FreeBSD with sysinstall ? - Yes, from medio july FreeBSD-4.X snapshots have recognized the - fla devices in sysinstall. You need to build a custom kernel - with the driver though. See below about booting from a fla - device. + Yes, it has been tested in FreeBSD-4.0-CURRENT and it works. + You will need to build a kernel with the fla driver since + the default "GENERIC" kernel doesn't contain the fla driver. [6] How to boot from a fla device ? @@ -63,12 +66,132 @@ $FreeBSD$ [8] Who to contact ? doc2k@phk.freebsd.dk will offer limited best-effort help - to the extent time permits. + to the extent time permits. Further support for special + projects or configurations available at reasonable hourly + rates. + +[9] Getting detailed + + The DiskOnChip product gets out in some odd corners of the + PC-architecture, and chances are that things don't do what + you expect. Here are some hints and random observations + I've made during my work with these devices. + +[9a] Choosing an address for the DOC + + Each DOC needs a 8K memory window starting on an 8K boundary. + The lowest possible address is C000:0, the highest is DE00:0 + + If your hardware puts the DOC another place, you will need + to modify the doc2k_probe() call in fla.c. + + It is important that you set the BIOS to not do "fancy things" + with this window, in particular no kind of cache or shadowing + can be enabled. + + Be aware that some hardware will decode a 32k memory window + for the DOC device. + + If everything is OK, the DOC will print a message during + the BIOS startup. + + For large devices it can take some time to check the flash + data structures, but if it takes more than 3 minutes + something is wrong. + + If you boot a MSDOS floppy and run FDISK you should be able + to see the DOC device. + + If it doesnt work: + + If you machine never gets to the point where it will boot, + but just hangs it could be because you have a BIOS which + need the "slightly special" DOC firmware. Obviously you + will need to put the DOC in another machine to load this + firmware. You can download the firmware and utilities + from M-systems website http://www.m-sys.com + + If the machine boots, but the device isn't visible it can + be because some other device uses the same memory window, + or because the BIOS prevents it from being used. If you + boot MSDOS and enter DEBUG, you should be able to find a + BIOS extension signature at the address using the 'd' + command, for instance 'd d800:0'. + + A special case is when the DOC prints the BIOS message + but disappears afterwards, this can happen because another + card (NCR SCSI controllers for instance) steal the memory + window later in the boot process. In such a case the + above check with DEBUG will not show the BIOS signature. + +[9b] So just who is drive 'C' here anyway ? + + Using the DUPDATE program you can choose to have the DOC + add itself at the front or the back of the device list. -[9] Will more documentation be forthcoming ? + This is, unfortunately not the only thing affecting the + drive order, the above mentioned NCR SCSI controllers also + have some builtin AI, and the result can be very confusing + because the DOC will come before even the floppy as a result. - YES. + There is no simple solution for this case, only variuos + work-arounds. But chances are good that most users will + not use both a DOC and a SCSI in the same system, except + maybe for initial programming. + +[9c] MBR/fdisk + + The boot firmware in the DOC and/or the FreeBSD bootblocks + mandate that the first MBR slice/(partition in FDISK lingo) + start exactly at "sector #1, head #1, cylinder #0." You + will have problems booting from the fla if you don't get this + right. The prep.fla.sh script will do this for you. + + DO NOT WRITE JUNK IN THE MBR! The DOC firmware relies on + various fields and can get utterly confused if they don't + make sense. + +[9d] Getting the FreeBSD kernel to use the fla as root + + Please see above under item 6. + +[9e] I turned the machine off while it was running and now my + DOC hangs during boot/panics the machine/does weird things. + + If a write operation to the DOC gets interrupted by reset + or power-failure, it can happen that the flash data structures + are left in a state the sofware cannot cope with. + + Your best chance is to DUPDATE, DFORMAT the device again. + + If it hangs during boot, you can use this particular dirty + trick ENTIRELY AT YOUR OWN RISK! DO NOT COMPLAIN IF THIS + DOESN'T WORK FOR YOU OR IF YOU DESTROY YOUR COMPUTER OR + DOC DEVICE DOING IT! + + Jumper the DOC for an address which will not work, but which + will not interfere with the system either, C000:0 seems to + work pretty universally for this. + + Boot MSDOS and rejumper the DOC for its real (working) address. + + Run DUPDATE and use the /win:xxxx argument to point it at the + DOC device. + +[9f] Apart from that... + + ...the DOC is just like any other disk, but it is silent, + has better MTBF and doesn't take up a lot of space. + + +[10] History + + The fla driver was written by Poul-Henning Kamp <phk@FreeBSD.org> + under contract for M-systems, and using their "OSAK" + development kit. Good Luck, Poul-Henning + +$FreeBSD$ diff --git a/sys/contrib/dev/fla/prep.fla.sh b/sys/contrib/dev/fla/prep.fla.sh index 9d3999d..5d27717 100644 --- a/sys/contrib/dev/fla/prep.fla.sh +++ b/sys/contrib/dev/fla/prep.fla.sh @@ -1,8 +1,9 @@ #!/bin/sh +# $FreeBSD$ dev=fla0 -grep "$dev.*sectors" /var/run/dmesg | tr -d '(:)' | awk ' +grep "$dev.*sectors" /var/run/dmesg.boot | tr -d '(:)' | awk ' { v = $3 c = $5 |