to various pmap_*() functions instead of looking up the physical address
and passing that. In many cases, the first thing the pmap code was doing
was going to a lot of trouble to get back the original vm_page_t, or
it's shadow pv_table entry.
Inspired by: John Dyson's 1998 patches.
Also:
Eliminate pv_table as a seperate thing and build it into a machine
dependent part of vm_page_t. This eliminates having a seperate set of
structions that shadow each other in a 1:1 fashion that we often went to
a lot of trouble to translate from one to the other. (see above)
This happens to save 4 bytes of physical memory for each page in the
system. (8 bytes on the Alpha).
Eliminate the use of the phys_avail[] array to determine if a page is
managed (ie: it has pv_entries etc). Store this information in a flag.
Things like device_pager set it because they create vm_page_t's on the
fly that do not have pv_entries. This makes it easier to "unmanage" a
page of physical memory (this will be taken advantage of in subsequent
commits).
Add a function to add a new page to the freelist. This could be used
for reclaiming the previously wasted pages left over from preloaded
loader(8) files.
Reviewed by: dillon
chipsets. An example of this is the USB controller on these chipsets.
With this, I can now use USB devices on the test Alpha I am borrowing at
the moment.
Reviewed by: dfr, obrien
same functionality. Sharing code should help cache issues.
Remove in_cksum_partial, since its not being used, and we now have
a way to compute partial checksums on mbuf chains.
via sysctl. It's done pretty simply but it should be quite adequate.
Also move SHMMAXPGS from $machine/include/vmparam.h as the comments that
went with it were wrong... we don't allocate KVM space for the pages so
that comment is bogus.. The only practical limit is how much physical
ram you want to lock up as this stuff isn't paged out or swap backed.
- Microsoft IntelliMouse Explorer: 2 buttons on top, 2 side buttons
and a wheel which also acts as the middle button. The mouse is
recognized as "IntelliMouse Explorer".
- Genius NetScroll Optical: 2 buttons on top, 2 side buttons and a
wheel which also acts as the middle button. The mouse is recognized
as "NetMouse/NetScroll Optical".
- MouseSystems SmartScroll Mouse (OEM from Genius?): 3 buttons on top,
1 side button and a wheel. The mouse is recognized as Genius
"NetScroll".
- IBM ScrollPoint: 2 buttons on top and a stick between the buttons.
The stick can perform "horizontal scroll" in W*ndows environment.
The horizontal movement of the stick is detected. It is currently
mapped to the Z axis movement in the same way as the first wheel.
The mouse is recognized as "MouseMan+", as it is considered to be
a variation of MouseMan.
- A4 Tech 4D and 4D+ mice. These mice have two wheels! The movement
of the second wheel is reported as the Z axis movement in the
same way as the first wheel. These mice are recognized as "4D
Mouse" and "4D+ Mouse".
- Tweak IntelliMouse support code a bit so that less-than-compatible
wheel mice can work properly with the psm driver.
- Add driver configuration flags which correspond to the kernel
options PSM_HOOKRESUME and PSM_RESETAFTERSUSPEND, so that we don't
need to recompile the kernel when we need these functions.
- Properly keep track of the irq resource.
- Add a watchdog timer in case interrupts are lost (experimental).
- Add `detach' function (experimental).
just the first one.
* Don't reserve extra memory for the prom console unless the platform
actually uses it.
* Fix some historical confusion and a minor bug in the message buffer
initialisation.
Submitted by: gallatin for the prom console part
Approved by: jkh
was needed to make attach/detach of devices work, which is
needed for the PCCARD support.
(PCCARD support is still not working though, more to come on that)
Support the CMD646 chip which is used on many alphas, sadly only
in WDMA2 mode, as the silicon is broken beyond belief for UDMA modes.
Lots of cosmetic fixes here and there.
Sorry for the size of this megapatchfromhell but it was not
possible otherwise...
newbus patches based on work from: dfr (Doug Rabson)
fixes some namespace pollution in general and breakage of modules that
aren't in the sys tree in particular (<machine/ipl.h> includes further
headers that aren't installed under /usr/include).
Reimplemented SPLASSERT() so that it is more machine independent and
less bloated and doesn't require the <machine/ipl.h> include spam.
In particular, don't assume that `cpl' can be printed using %08x
format. The alpha arch doesn't even have `cpl'. SPLASSERT() was
harmless on alphas because it isn't actually used.
delivering SIGBUS). This will allow a non-superuser to control unaligned
access behaviour on a per-process basis once a userland control program
(uac) is written.
Reviewed by: obrien
Tested by: obrien
unless both "option INVARIANTS" and "options INVARIANT_SUPPORT"
are defined in the kernel's config(8) file.
SPLASSERT(expression, msg) used KASSERT to check that the
expression is true, panic()ing the kernel otherwise.
Approved by: jkh
Reviewed by: jdp, dfr, phk, eivind and green
is an application space macro and the applications are supposed to be free
to use it as they please (but cannot). This is consistant with the other
BSD's who made this change quite some time ago. More commits to come.
In combination with Doug's recent alpha_cpu.h, this reduces the cost
of ipl raising/lowering significantly. This is most pronounced when
doing file reads.
Reviewed by: dfr
specific instructions such as rpcc and mb. This should provide some
performance improvements and will allow me to delete the file pal.s.
To allow people time to update their loadable modules, I will leave pal.s
alone for now.
was likely to be counted as idle time.
Note that we are counting time spent in software interrupt handlers as
interrupt time, so this invalidates the i386 meaning of intr_nesting_level.
Reviewed by: dfr, bde
Tested by: anderson@cs.duke.edu
The old code was spread out through the machdep code and was sloppy about
enabling and disabling the FEN bit (which controls access to the FP
register set). This caused a DIAGNOSTIC warning "DANGER WILL ROBINSON:
FEN SET IN cpu_fork!" sometimes when operating under high loads and could
conceivably lead to processes getting incorrect FP results.
The new code is much more strict about the FEN bit and makes sure that
*only* fpcurproc ever has it enabled. This also allows us to remove a
section of code from the exception_return path which might improve
performance marginally.
Reviewed by: gallatin
Merge the contents (less some trivial bordering the silly comments)
of <vm/vm_prot.h> and <vm/vm_inherit.h> into <vm/vm.h>. This puts
the #defines for the vm_inherit_t and vm_prot_t types next to their
typedefs.
This paves the road for the commit to follow shortly: change
useracc() to use VM_PROT_{READ|WRITE} rather than B_{READ|WRITE}
as argument.
* Change the hack used on the alpha for mapping devices into DENSE or
BWX memory spaces to a simpler one. Its still a hack and should be
a seperate api to explicitly map the resource.
* Add $FreeBSD$ as necessary.
struct sigcontext and ucontext_t/mcontext_t are defined in such
a way that both (ie struct sigcontext and ucontext_t) can be
passed on to sigreturn. The signal handler is still given a
ucontext_t for maximum flexibility.
For backward compatibility sigreturn restores the state for the
alternate signal stack from sigcontext.sc_onstack and not from
ucontext_t.uc_stack. A good way to determine which value the
application has set and thus which value to use, is still open
for discussion.
NOTE: This change should only affect those binaries that use
sigcontext and/or ucontext_t. In the source tree itself
this is only doscmd. Recompilation is required for those
applications.
This commit also fixes a lot of style bugs without hopefully
adding new ones.
NOTE: struct sigaltstack.ss_size now has type size_t again. For
some reason I changed that into unsigned int.
Parts submitted by: bde
sigaltstack bug found by: bde
-----------------------------
By introducing a new sigframe so that the signal handler operates
on the new siginfo_t and on ucontext_t instead of sigcontext, we
now need two version of sendsig and sigreturn.
A flag in struct proc determines whether the process expects an
old sigframe or a new sigframe. The signal trampoline handles
which sigreturn to call. It does this by testing for a magic
cookie in the frame.
The alpha uses osigreturn to implement longjmp. This means that
osigreturn is not only used for compatibility with existing
binaries. To handle the new sigset_t, setjmp saves it in
sc_reserved (see NOTE).
the struct sigframe has been moved from frame.h to sigframe.h
to handle the complex header dependencies that was caused by
the new sigframe.
NOTE: For the i386, the size of jmp_buf has been increased to hold
the new sigset_t. On the alpha this has been prevented by
using sc_reserved in sigcontext.
be set by a kernel conf option due to the struct buf structural
dependancy (sizing of b_pages[]) creating a conflict with modules
(which are not compiled with kernel config options overrides).
We'll be able to sysctl these two later on when the buffer subsystem
is revamped.
equivalent to SYS_RES_MEMORY for x86 but for alpha, the rman_get_virtual()
address of the resource is initialised to point into either dense-mapped
or bwx-mapped space respectively, allowing direct memory pointers to be
used to device memory.
Reviewed by: Andrew Gallatin <gallatin@cs.duke.edu>
