it more rich: reinstate debug options (commented out), add a bunch of
MI options, file systems, pseudo devices (commented out), sort some
entries, add more comments and clean up existing comments.
external buffer for the PC card connected to the channel. This hack
makes pcmcia cards "being used" at the boot time (by WinCE or NetBSD)
correctly detected. A machine running with root on NFS can now be
properly rebooted.
reversed order.
When you boot with two CF cards inserted, this options makes the one
in the "memory only" slot (channel 1), which is almost always the card
with the NetBSD install, attached as wd0.
Unlike using fixed unit numbers in the kernel config, if you boot with
only a single CF card, that single card will still be wd0 regardless
of which slot it is inserted in.
http://mail-index.netbsd.org/port-hpcsh/2003/10/23/0000.html provides
a more verbose description of why this option is convenient for most
usage patterns.
While here, do some cosmetic changes:
* sort PCMCIA network interfaces section.
* ksyms is not a wscons related pseudo device, so move it to misc.
* line up scif at shb line, and move related options to be after it.
Use CONFIG_HOOK_POWERCONTROL_LCDLIGHT to turn on/off the LCD in
response to WSDISPLAYIO_SVIDEO.
Implementation of these hooks for Jornada 680 is to follow shortly.
Gone are the old kern_sysctl(), cpu_sysctl(), hw_sysctl(),
vfs_sysctl(), etc, routines, along with sysctl_int() et al. Now all
nodes are registered with the tree, and nodes can be added (or
removed) easily, and I/O to and from the tree is handled generically.
Since the nodes are registered with the tree, the mapping from name to
number (and back again) can now be discovered, instead of having to be
hard coded. Adding new nodes to the tree is likewise much simpler --
the new infrastructure handles almost all the work for simple types,
and just about anything else can be done with a small helper function.
All existing nodes are where they were before (numerically speaking),
so all existing consumers of sysctl information should notice no
difference.
PS - I'm sorry, but there's a distinct lack of documentation at the
moment. I'm working on sysctl(3/8/9) right now, and I promise to
watch out for buses.
copyin() or copyout().
uvm_useracc() tells us whether the mapping permissions allow access to
the desired part of an address space, and many callers assume that
this is the same as knowing whether an attempt to access that part of
the address space will succeed. however, access to user space can
fail for reasons other than insufficient permission, most notably that
paging in any non-resident data can fail due to i/o errors. most of
the callers of uvm_useracc() make the above incorrect assumption. the
rest are all misguided optimizations, which optimize for the case
where an operation will fail. we'd rather optimize for operations
succeeding, in which case we should just attempt the access and handle
failures due to insufficient permissions the same way we handle i/o
errors. since there appear to be no good uses of uvm_useracc(), we'll
just remove it.
This only turns off the display in the LCD controller.
TODO: Need to add a platform specific way to turn the screen on and
off as well (e.g. on Jornada 680 this is bit 0 in hd64461 GPIO port B).
