Well, better late than newer, but things has been hectic
around here, sorry for the long delay.
DMA support has been added to the ATA disk driver.
This only works on Intel PIIX3/4, Acer Aladdin and Promise controllers.
The promise support works without the BIOS on the board,
and timing modes are set to support up to UDMA speed. This
solves the problems with having more than one promise controller
in the same system.
There is support for "generic" DMA, that might work on other
controllers, but now you have been warned :)
More chipset specific code will come soon, I have to find testers
with the approbiate HW, more on that when I have it ready.
The system now uses its own major numbers, please run MAKEDEV
with the devices you need (ad?, acd?, afd?, ast?).
For now the disk driver will also attach to the old wd major
so one can at least boot without this step, but be warned, this
will eventually go away. The bootblocks will have to be changed
before one can boot directly from an "ad" device though.
Fixed problems:
All known hang problems should be solved
The probe code has been sligthly changed, this should solve
the reports I have lying around (I hope).
Hangs when accessing ata & atapi device on the same channel simultaniously.
A real braino in ata_start caused this, fixed.
As usual USE AT YOUR OWN RISK!!, this is still pre alpha level code.
Especially the DMA support can hose your disk real bad if anything
goes wrong, agaiin you have been warned :)
But please tell me how it works for you!
Enjoy!
-Søren
affects cases where there is a slave but no master. These bugs
were usually recovered from provided ATAPI was configured, but only
after lengthy delays. Configuring ATAPI still fixes some bugs for
non-atapi drives.
Don't wait for seek complete in wdreset(). If necessary for pre-ata
drives, it can be waited for later (we got it wrong by only looking
at it for drive 0 anyway). It is set as part of a historical
signature for ata drives but doesn't say anything useful about the
reset state. It is cleared as part of a non-historical signature
for atapi drives so that drivers which don't understand atapi drives
seem to see no drive. Waiting for it caused lengthy delays and
broke the status returned by wdreset() in cases where the master
was not an ata drive. Then the whole wdprobe() failed in some
cases where the recovery code didn't work.
Don't wait for drive ready in wdreset(). The considerations are
the same as for seek complete, except drive ready does say something
useful about the reset state of ata drives, and waiting for it
later is required anyway for such drives.
Lengthy delays can now be avoided by not configuring nonexistent
(ata) drives. Unfortunately, this breaks detection of atapi drives
in some configurations.
for passing in their own data space and associated page table information.
Update the support files so that any pages in the vm86 page table are
mapped, rather than just one page.
Restore the E820 memory probe, and have it use the new interface.
of private_tss, and there's no need to use a bit array. Also fixes
the problem of using `je' after btrl, since cmpl sets ZF.
Noticed by: Luoqi, on -current
switching video modes. People typically see the panic when the screen
saver has been running and is being stopped.
WARNING: this is not a real fix. Something really funny must be
happening in the page table entries for the physical memory
0x0-0xa0000, which is mapped to the beginning of the kernel region.
Use the pmap_kenter/pmap_kremove inline functions
instead of duplicating them.
pmap_remove_all:
Eliminate an unused (but initialized) variable.
pmap_ts_reference:
Change the implementation. The new implementation is much smaller
and simpler, but functionally identical. (Reviewed by
"John S. Dyson" <dyson@iquest.net>.)
bootblocks in order to boot the kernel after this! Also note that this
change breaks BSDI BSD/OS compatibility.
Also increased default NKPT to 17 so that FreeBSD can boot on machines
with >=2GB of RAM. Booting on machines with exactly 4GB requires other
patches, not included.
KBD_INSTALL_CDEV).
- Removed the note that the VESA option cannot be used on the SMP system;
this is not true.
- Moved the option VESA to more appropriate place.
- Refined internal interface in keyboard drivers so that:
1. the side effect of device probe is kept minimal,
2. polling mode function is added,
3. and new ioctl and configuration options are added (see below).
- Added new ioctl: KDSETREPEAT
Set keyboard typematic rate. There has existed an ioctl command,
KDSETRAD, for the same purpose. However, KDSETRAD is dependent on
the AT keyboard. KDSETREPEAT provides more generic interface.
KDSETRAD will still be supported in the atkbd driver.
- Added new configuration options:
ATKBD_DFLT_KEYMAP
Specify a keymap to be used as the default, built-in keymap.
(There has been undocumented options, DKKEYMAP, UKKEYMAP, GRKEYMAP,
SWKEYMAP, RUKEYMAP, ESKEYMAP, and ISKEYMAP to set the default keymap.
These options are now gone for good. The new option is more general.)
KBD_DISABLE_KEYMAP_LOADING
Don't allow the user to change the keymap.
Move the Olicom token ring driver to the officially sanctionned location of
/sys/contrib. Also fix some brokenness in the generic token ring support.
Be warned that if_dl.h has been changed and SOME programs might
like recompilation.
config info. On early revision cards (742a), the EISA register space,
other than the location used to determine the address of the card's main
command ports, is write only.
to manage their own memory. Tested on my machine (make buildworld).
I've made analogous changes on the alpha, but don't have a machine
to test.
Not-objected-to by: dg, gibbs
