the most "officially looking" is IEC 60027-2, ie "Ki", "Mi", ...,
which is not too popular, and which would require more code changes.
So stick with the traditional capital "K" for (divisor==1024), and use
the SI "k" otherwise (ie (divisor==1000)).
Change the name of structure ieee80211_bss to ieee80211_node, which is
used for management of stations in hostap mode, and peers in ibss mode.
Split off ic_opmode, ic_phytype from ic_flags.
Preparation to merge 'wi' driver into 80211subr.c.
before rev 1.4. This change makes OF 2.4 machines actually boot, and
it works fine on my OF 2.01 machine. No reports of failures on other
archs.
I expect this change is fine as the original code flushed the just-loaded
ofwboot out of the cache, conditionalized on FIRMWORKSBUGS. In rev.
1.4, the code got in-lined, and changed to actually flush low memory
out of the cache. Since machines kept booting, I expect the firmware
was really flushing the binary out of the cache, so we're fine.
a vector of indices into the cfdata table to specify potential parents,
record the interface attributes that devices have and add a new "parent
spec" structure which lists the iattr, as well as optionally listing
specific parent device instances.
See:
http://mail-index.netbsd.org/tech-kern/2002/09/25/0014.html
...for a detailed description.
While here, const poison some things, as suggested by Matt Thomas.
it actually fixes a problem:
When /bin/sh gets a SIGSEGV, its signal handler calls brk and the offending
instruction is retried. Usually it gets another SIGSEGV, and things loops
until it pases without the SIGSEGV. This is the normal mode of operation, and
it can be reproduced on IRIX by a 10kB shell script starting by echo /*
However... the signal handler checks for BADVADDR in the saved registers
in struct sigcontext. If it does not find it, it gives up and exit instead
of retrying. Filling the field enables us to carry on normal operation
(which is to get dozens of SIGSEGV) instead of getting a failure at the
first SIGSEGV.
Setup sequence obtained from Krups OFW with some CyberPro-specific
magic from Linux driver. The driver still has a lot of hardcoded
stuff, but it is useful enough to bring up wscons on netwinder.
XXX: Proper console attachment needs to be written (the driver was
originally developed on sparc, where our approach to attaching console
is totally different).
Caveat emptor!
hunting for an MSS option to clamp. The previous code assumed that at least
one more byte of options (such as a TCPOPT_EOL) would follow the MSS
option; now, we allow the MSS option to end on the last byte of the
TCP header.
Packets have been observed "in the wild" with a TCP header length of
'6' (24 bytes.. 20 bytes fixed header, 4 bytes options) with a 4-byte
MSS option exactly filling the 4 bytes of options payload and no
following TCPOPT_EOL.
RFC793 is quite explicit that the EOL byte:
" .. need only be used if the end of the options would not
otherwise coincide with the end of the TCP header."
bpf_mtap() gets called with not-well-initialized mbuf, so we need to go through
it without touching m->m_pkthdr.len and such. it's part of our bpf_mtap() API
(at least today).
by me:
* Speed up reading/writing buffers from the hardware by avoiding
slow forward seeks. In preparation to use the optimization, do
not read overlapping bytes. This is currently disabled, but can
be enabled with OPTIMIZE_RW_DATA.
* Hand 802.11 and Prism-specific frames to BPF. User can watch these
frames by specifying an alternate DLT to e.g. tcpdump(8).
* Add support for SIOC[SG]80211BSSID and SIOC[SG]80211CHANNEL.
* Issue join requests and track join/create state through link-status
notifications.
* Split wi_rxeof into separate routines for receiving Ethernet II,
802.11 data, and 802.11 management frames.
* Bug fix: Account for aligning m_data to a word boundary in the Rx
buffer size check.
* Bug fix: Check for LLC/SNAP even if the firmware tells us the frame
is Ethernet II, as the firmware sometimes gets this wrong.
* Process as many events as possible when we get an interrupt, using
a simple heuristic to avoid reprocessing an event (which can have
bad side-effects). Clamp the time spent in the interrupt handler
to 4ms.
* Redo the timeout loops to be consistent and less prone to error.
* Add delays to timeout loops which were missing them, so that a
fast CPU won't win the race.
* Borrow some timeout loop values from the linux-wlan-ng driver,
which seems to reflect a high level of clue (due to direct support
from Intersil).
* Get rid of silly wi_read_data(..., len + 2) idiom; simply round up
in wi_read_data() and wi_write_data(). Also, protect against a
length of 0.
* Name some frequently-used constants. Correct spelling. Other style nits.
* Bug fix: On Prism, set Create IBSS register to 0 *always*. The meaning
of Create IBSS == 1 is join an IBSS or *ESS*, and we do not want to
join an ESS, because that would put us in an inconsistent state. 0
is the right value for Prism.
* Bug fix: Clean up state at the top of wi_init(), in the event that
we don't reach the bottom.
* Simplify wi_start() by always providing an RFC1042-encoded 802.11
frame to the firmware.
* Larval powersave support for HostAP mode, enabled by WI_HOSTAP_POWERSAVE.
* Bug fix: Call wi_stop() from wi_shutdown().
* Bug fix: sync media options with HostAP mode in wi_sync_media().
* In wi_media_status(), inquire firmware for current media state if
media == auto. From FreeBSD.
* Clean up the way buffer lengths are computed by using pointer
arithmetic rather than magic constants.
* Swap the order of comparisons in addr_cmp() for speed.
* Bug fix: Send ReAssoc Response instead of Assoc Response to a
ReAssoc Request.
* Bug fix: Copy SSID using the correct size.
* Give more meaningful names to offsets in a wi_frame.
* Bug fix: Assign the right values to the named constants for
Rx frame encoding.
* Get rid of useless SNAP constants.
there's an error. Store the result of this function in a signed
variable instead of an unsigned variable before checking if the return
value is greater than zero.
Allocate/Prefetch one cache-line ahead of the one we're about to deal with.
This reduces the chances of the cpu stalling while waiting for the cache
to flush a dirty line in order to satisfy the Allocate/Prefetch request.
registers in any trap/interrupt exception frame found.
- Slight tweak to more accurately detect the correct call-site when
looking for a function's prologue.
explicitly in single file which implicitly needed it (altq_conf.c)
this avoids pulling in implicit dependency on <sys/conf.h> to every
file including <net/if.h> (which includes <altq/if_altq.h> to get altq
related structures)
tearing down a vm_map. use this to skip the pmap_update()
at the end of all the removes, which allows pmaps to optimize
pmap tear-down. also, use the new pmap_remove_all() hook to
let the pmap implemenation know what we're up to.
- use struct vm_page_md for attaching pv entries to struct vm_page
- change pseg_set()'s return value to indicate whether the spare page
was used as an L2 or L3 PTP.
- use a pool for pv entries instead of malloc().
- put PTPs on a list attached to the pmap so we can free them
more efficiently (by just walking the list) in pmap_destroy().
- use the new pmap_remove_all() interface to avoid flushing the cache and TLB
for each pmap_remove() that's done as we are tearing down an address space.
- in pmap_enter(), handle replacing an existing mapping more efficiently
than just calling pmap_remove() on it. also, skip flushing the
TSB and TLB if there was no previous mapping, since there can't be
anything we need to flush. also, preload the TSB if we're pre-setting
the mod/ref bits.
- allocate hardware contexts like the MIPS pmap:
allocate them all sequentially without reuse, then once we run out
just invalidate all user TLB entries and flush the entire L1 dcache.
- fix pmap_extract() for the case where the va is not page-aligned and
nothing is mapped there.
- fix calculation of TSB size. it was comparing physmem (which is
in units of pages) to constants that only make sense if they are
in units of bytes.
- avoid sleeping in pmap_enter(), instead let the caller do it.
- use pmap_kenter_pa() instead of pmap_enter() where appropriate.
- remove code to handle impossible cases in various functions.
- tweak asm code to pipeline a little better.
- remove many unnecessary spls and membars.
- lots of code cleanup.
- no doubt other stuff that I've forgotten.
the result of all this is that a fork+exit microbenchmark is 34% faster
and a fork+exec+exit microbenchmark is 28% faster.
cpu_idle() and new cpu_switch() to replace the old cpu_switch()
which did the lot. Runs leaner without overly blocking interrupts.
Includes cleanup of the RAS code to make use of callee-saved registers.
Benchmarks on DX4 @ 100MHz reveal a slight performance improvement
but probably not statistically signficant. More TBD to verify this.
Changes passed a pounding on Athlon @ 1GHz too.
This is done by adding an extra argument to mi_switch() and
cpu_switch() which specifies the new process. If NULL is passed,
then the new function chooseproc() is invoked to wait for a new
process to appear on the run queue.
Also provides an opportunity for optimisations if "switching to self".
Also added are C versions of the setrunqueue() and remrunqueue()
low-level primitives if __HAVE_MD_RUNQUEUE is not defined by MD code.
All these changes are contingent upon the __HAVE_CHOOSEPROC flag being
defined by MD code to indicate that cpu_switch() supports the changes.
rely on default value. It should actually be extracted
from the bootpath instead, but that involves translating
from apple partition map entries to netbsd disklabel entries.
memory fault handler. IRIX uses irix_vm_fault, and all other emulation
use NULL, which means to use uvm_fault.
- While we are there, explicitely set to NULL the uninitialized fields in
struct emul: e_fault and e_sysctl on most ports
- e_fault is used by the trap handler, for now only on mips. In order to avoid
intrusive modifications in UVM, the function pointed by e_fault does not
has exactly the same protoype as uvm_fault:
int uvm_fault __P((struct vm_map *, vaddr_t, vm_fault_t, vm_prot_t));
int e_fault __P((struct proc *, vaddr_t, vm_fault_t, vm_prot_t));
- In IRIX share groups, all the VM space is shared, except one page.
This bounds us to have different VM spaces and synchronize modifications
to the VM space accross share group members. We need an IRIX specific hook
to the page fault handler in order to propagate VM space modifications
caused by page faults.
This is the last of the 'easy' ones that Krister made me aware of.
Total savings on i386 GENERIC kernel: 13151 bytes
RAIDframe in GENERIC is now at: 179033
Thanks again Krister!
are related to using libsa's alloc(). Problems go away with this alloc().
The problem is that the libsa alloc() assumes we can grab memory off
the end of the program. That assumption doesn't work for us. It's
much better to use the alloc() we were using as it calls OF_claim()
to get memory.
This ensures we start from the actual call site, not the return address.
The latter may actually be in the next consecutive function if the current
function has the __noreturn__ attribute and the alignment is Just Right.
thorpej