Commit Graph

9594 Commits

Author SHA1 Message Date
John Baldwin
7e42a90bf6 Use the same style of paragraph indention that the rest of NOTES uses in
the SMP section.
2003-11-11 15:49:37 +00:00
John Baldwin
20694d64a2 Axe rotted comment about MP Tables and PCI cards with built in bridges.
Now that we properly route PCI interrupts for the apic case, these cards
are no longer a problem.
2003-11-11 15:47:44 +00:00
John Baldwin
4e478d4521 MFamd64 (via P4, not in CVS yet):
- Use the static boot_address variable directly rather than passing it
  around to several functions.
- Clean up a couple of magic numbers.
2003-11-10 21:24:34 +00:00
John Baldwin
95020215db Bump APIC ID limits up to 32 since a machine with 16 CPUs will have APIC
IDs for the I/O APICs that are greater than 16.

Reported by:	John Cagle <john.cagle@hp.com>
2003-11-10 19:52:58 +00:00
John Baldwin
4c76854fad Update a comment related to SMP and describe the NO_MIXED_MODE kernel
option.

Requested by:	bde
2003-11-10 15:54:32 +00:00
John Baldwin
c68ec2c20b Update a comment.
Requested by:	bde
2003-11-10 15:48:30 +00:00
Marcel Moolenaar
fcaa2925a9 Change the clear_ret argument of get_mcontext() to be a flags argument.
Since all callers either passed 0 or 1 for clear_ret, define bit 0 in
the flags for use as clear_ret. Reserve bits 1, 2 and 3 for use by MI
code for possible (but unlikely) future use. The remaining bits are for
use by MD code.

This change is triggered by a need on ia64 to have another knob for
get_mcontext().
2003-11-09 20:31:04 +00:00
Seigo Tanimura
512824f8f7 - Implement selwakeuppri() which allows raising the priority of a
thread being waken up.  The thread waken up can run at a priority as
  high as after tsleep().

- Replace selwakeup()s with selwakeuppri()s and pass appropriate
  priorities.

- Add cv_broadcastpri() which raises the priority of the broadcast
  threads.  Used by selwakeuppri() if collision occurs.

Not objected in:	-arch, -current
2003-11-09 09:17:26 +00:00
Alan Cox
5e4a2fc9aa - Similar to post-PAE RELENG_4 split pmap_pte_quick() into two cases,
pmap_pte() and pmap_pte_quick().  The distinction being based upon the
   locks that are held by the caller.  When the given pmap is not the
   current pmap, pmap_pte() should be used when Giant is held and
   pmap_pte_quick() should be used when the vm page queues lock is held.
 - When assigning to PMAP1 or PMAP2, include PG_A anf PG_M.
 - Reenable the inlining of pmap_is_current().

In collaboration with:	tegge
2003-11-08 03:01:26 +00:00
John Baldwin
88861af1fb Dump the trigger and polarity of each intpin's default setting in the
bootverbose output.
2003-11-07 23:44:35 +00:00
Scott Long
eb3b7bf69f Document the lockfunc and lockfuncarg arguments to bus_dma_tag_create() in
the busdma headers.
2003-11-07 23:29:42 +00:00
John Baldwin
fab73bc221 Regen. 2003-11-07 21:36:35 +00:00
John Baldwin
572e11ac18 Sync up MP safe flags with global syscalls.master for the first time. This
includes read(), write(), close(), linux_setuid16(), linux_getuid16(),
linux_pause(), linux_nice(), linux_kill(), dup(), linux_pipe(),
linux_setgid16(), linux_getgid16(), linux_signal(), linux_geteuid16(),
linux_getegid16(), acct(), setpgid(), umask(), dup2(), getppid(),
getpgrp(), setsid(), linux_sigaction(), linux_sgetmask(), linux_ssetmask(),
linux_setreuid16(), linux_setregid16(), linux_sigsuspend(), getrusage(),
gettimeofday(), linux_getgroups16(), linux_setgroups16(), getpriority(),
setpriority(), linux_sigreturn(), linux_clone(), linux_sigprocmask(),
linux_getsid(), mlock(), munlock(), mlockall(), munlockall(),
sched_setparam(), sched_getparam(), linux_sched_setscheduler(),
linux_sched_getscheduler(), linux_sched_get_priority_max(),
linux_sched_get_priority_min(), sched_rr_get_interval(),
linux_setresuid16(), linux_getresuid16(), linux_setresgid16(),
linux_getresgid16(), linux_rt_sigaction(), linux_rt_sigprocmask(),
linux_rt_sigsuspend(), geteuid(), getegid(), setreuid(), setregid(),
linux_getgroups(), linux_setgroups(), setresuid(), getresuid(),
setresgid(), getresgid(), setuid(), and setgid().
2003-11-07 21:36:14 +00:00
John Baldwin
8dec768242 Only disable the old pin when doing a remap if it's current vector is still
the old vector.

Reported by:	sam
2003-11-06 14:47:53 +00:00
Peter Wemm
6350f49c4a OK, this might be a bit silly, but add another popcnt() candidate. 2003-11-06 01:24:25 +00:00
Eric Anholt
0ead5fc999 Spelling and grammar fixes.
PR:		kern/54658
Submitted by:	Roderick van Domburg <r.s.a.vandomburg@student.utwente.nl>
2003-11-05 23:56:02 +00:00
John Baldwin
e76f445443 Instead of marking all 159 interrupts as available in the IRQ resource
manager, only add interrupts that have an associated source in the
interrupt table to the resource manager.
2003-11-05 23:19:44 +00:00
John Baldwin
f84d8b318a When remapping an ISA interrupt from one intpin to another, disable the
pin that is used by the default identity mapping if it still maps to the
old vector.  The ACPI case might need some tweaking for the SCI interrupt
case since ACPI likes to address the intpin using both the IRQ remapped to
it as well as the previous existing PCI IRQ mapped to it.

Reported by:	kan
2003-11-05 23:15:52 +00:00
John Baldwin
240cfc80b3 Two style nits. 2003-11-05 23:07:39 +00:00
John Baldwin
be11140dfb - Adjust some of the bitfields in the ioapic_intsrc struct to be unsigned
rather than signed.  This fixes some cosmetics such as verbose printf's
  for IRQs greater than 127.
- The calculation for next_ioapic_base was also adjusted so that it will
  only complain once for each hole in the IRQs provided by ACPI for IO
  APICs.

Reported by:	Michal Mertl <mime@traveller.cz>
2003-11-05 16:18:06 +00:00
John Baldwin
fc0d431d4b Add a workaround for MP Tables that list the same PCI IRQ twice with
the same APIC / pin destination in both cases.

Reported by:	Pawel Jakub Dawidek <nick@garage.freebsd.pl>
2003-11-05 16:14:10 +00:00
John Baldwin
7542a92afa Tweak the version string output for ioapic devices. 2003-11-04 19:22:20 +00:00
John Baldwin
3de744b5d8 Use a wrapper around the driver interrupt handler. The wrapper accepts the
isa_device pointer as its argument and uses that to call the driver's
interrupt handler passing the unit number as its argument.  This should
fix COMPAT_OLDISA devices with a unit number of 0.

Reviewed by:	peter
Reported by:	bde
2003-11-04 19:04:54 +00:00
Yoshihiro Takahashi
dc5f261df8 Fix LINT 2003-11-04 14:02:13 +00:00
Yoshihiro Takahashi
0ca1bf3907 Fix to support pc98. 2003-11-04 13:13:04 +00:00
Yoshihiro Takahashi
95755cc99b Split pc98 support into pc98/pc98/nmi.c. 2003-11-04 13:01:41 +00:00
Peter Wemm
93c3f67fe7 Make this compile with PAE. 2003-11-04 01:07:04 +00:00
John Baldwin
8fd6ac3afa Remove old APIC header. 2003-11-03 23:10:34 +00:00
John Baldwin
892f579780 Remove remaining bits of old interrupt and APIC code. 2003-11-03 22:51:25 +00:00
John Baldwin
05354a6e42 Remove the SMP kernel config as SMP is now enabled in GENERIC. 2003-11-03 22:49:51 +00:00
John Baldwin
d1f5dae92b Remove references to SMP and APIC_IO since GENERIC (which this file
includes) already has those enabled by default.
2003-11-03 22:49:19 +00:00
John Baldwin
4443619c83 - Enable SMP and 'device apic' by default.
- Compile 'device acpi' into GENERIC by default as well.  Note that
  the beastie loader menu item to disable ACPI still works if ACPI is
  compiled into the kernel.
2003-11-03 22:48:25 +00:00
John Baldwin
bdb1bd342d Replace APIC_IO with 'device apic'. 2003-11-03 22:47:19 +00:00
John Baldwin
9fb19a6be3 Update includes for new interrupt code. 2003-11-03 22:38:00 +00:00
John Baldwin
73adfd0ca0 Catch up to interrupt code changes. 2003-11-03 22:37:28 +00:00
John Baldwin
7b525eb201 - Always allocate the maximum size for the IRQ resource manager. Ideally
we would manage this better by having the interrupt code add each
  interrupt vector to the resource map when each source is registered.
- Use the new interrupt code API for registering and tearing down interrupt
  handlers.
2003-11-03 22:36:43 +00:00
John Baldwin
bfba3d5ed3 Catch up to i386 interrupt and SMP code changes. 2003-11-03 22:34:53 +00:00
John Baldwin
147ad8d5ad New i386 SMP code:
- The MP code no longer knows anything specific about an MP Table.
  Instead, the local APIC code adds CPUs via the cpu_add() function when
  a local APIC is enumerated by an APIC enumerator.
- Don't divide the argument to mp_bootaddress() by 1024 just so that we
  can turn around and mulitply it by 1024 again.
- We no longer panic if SMP is enabled but we are booted on a UP machine.
- init_secondary(), the asm code between init_secondary() and ap_init()
  in mpboot.s and ap_init() have all been merged together in C into
  init_secondary().
- We now use the cpuid feature bits to determine if we should enable
  PSE, PGE, or VME on each AP.
- Due to the change in the implementation of critical sections, acquire
  the SMP TLB mutex around a slightly larger chunk of code for TLB
  shootdowns.
- Remove some of the debug code from the original SMP implementation
  that is no longer used or no longer applies to the new APIC code.
- Use a temporary hack to disable the ACPI module until the SMP code has
  been further reorganized to allow ACPI to work as a module again.
- Add a DDB command to dump the interesting contents of the IDT.
2003-11-03 22:32:04 +00:00
John Baldwin
9738024229 Don't probe PnP BIOS devices for PICs for now to avoid problems with those
devices claiming resources that they don't actually use.  The PIC drivers
only register valid interrupt sources, so we don't need to rely on these
drivers to claim invalid IRQs to prevent their use by other drivers.
2003-11-03 22:22:04 +00:00
John Baldwin
e9982e75c1 - Remove explicit enabling of the BSP's APIC in the APIC_IO case and the
slave pin on the master PIC in the !APIC_IO case.  The PIC drivers now
  manage these details internally.
- Remove an spl0() that hasn't done anything since SMPng was first
  committed.
- Update some comments that have rotted since SMPng.
2003-11-03 22:20:50 +00:00
John Baldwin
72e7f9b04a - Update includes.
- Use intr_suspend/resume() callouts to the interrupt code layer which
  suspends and resumes all the known interrupt sources instead of calling
  icu_reinit() directly.
2003-11-03 22:18:57 +00:00
John Baldwin
ab089945d3 Add the ACPI MADT table APIC enumerator. This code uses the ACPI Multiple
APIC Descriptor Table to enumerate both I/O APICs and local APICs.  ACPI
does not embed PCI interrupt routing information in the MADT like the MP
Table does.  Instead, ACPI stores the PCI interrupt routing information
in the _PRT object under each PCI bus device.  The MADT table simply
provides hints about which interrupt vectors map to which I/O APICs.  Thus
when using ACPI, the existing ACPI PCI bridge drivers are sufficient to
route PCI interrupts.
2003-11-03 22:17:44 +00:00
John Baldwin
8f8914ad98 Add the MP Table APIC enumerator. This code uses the BIOS MP Table to
enumerate I/O APICs as well as local APICs.  It also provides Host-PCI
and PCI-PCI bridge drivers to use the MP Table to route PCI interrupts.
2003-11-03 22:12:37 +00:00
John Baldwin
b9c72be725 - Export doreti as a global symbol.
- Don't include isa/vector.s.  Each PIC driver's entry points now live in
  their own standalone files.
2003-11-03 22:08:52 +00:00
John Baldwin
0b0da8649c Update names of entry points for interrupt frames. 2003-11-03 22:07:21 +00:00
John Baldwin
6f92bdd0c1 New APIC support code:
- The apic interrupt entry points have been rewritten so that each entry
  point can serve 32 different vectors.  When the entry is executed, it
  uses one of the 32-bit ISR registers to determine which vector in its
  assigned range was triggered.  Thus, the apic code can support 159
  different interrupt vectors with only 5 entry points.
- We now always to disable the local APIC to work around an errata in
  certain PPros and then re-enable it again if we decide to use the APICs
  to route interrupts.
- We no longer map IO APICs or local APICs using special page table
  entries.  Instead, we just use pmap_mapdev().  We also no longer
  export the virtual address of the local APIC as a global symbol to
  the rest of the system, but only in local_apic.c.  To aid this, the
  APIC ID of each CPU is exported as a per-CPU variable.
- Interrupt sources are provided for each intpin on each IO APIC.
  Currently, each source is given a unique interrupt vector meaning that
  PCI interrupts are not shared on most machines with an I/O APIC.
  That mapping for interrupt sources to interrupt vectors is up to the
  APIC enumerator driver however.
- We no longer probe to see if we need to use mixed mode to route IRQ 0,
  instead we always use mixed mode to route IRQ 0 for now.  This can be
  disabled via the 'NO_MIXED_MODE' kernel option.
- The npx(4) driver now always probes to see if a built-in FPU is present
  since this test can now be performed with the new APIC code.  However,
  an SMP kernel will panic if there is more than one CPU and a built-in
  FPU is not found.
- PCI interrupts are now properly routed when using APICs to route
  interrupts, so remove the hack to psuedo-route interrupts when the
  intpin register was read.
- The apic.h header was moved to apicreg.h and a new apicvar.h header
  that declares the APIs used by the new APIC code was added.
2003-11-03 21:53:38 +00:00
John Baldwin
223e573bbd Add the new atpic(4) driver for the 8259A master and slave PICs. By
default we provide 16 interrupt sources for IRQs 0 through 15.  However,
if the I/O APIC driver has already registered sources for any of those IRQs
then we will silently fail to register our own source for that IRQ.

Note that i386/isa/icu.h is now specific to the 8259A and no longer
contains any info relevant to APICs.  Also note that fast interrupts no
longer use a separate entry point.  Instead, both fast and threaded
interrupts share the same entry point which merely looks up the appropriate
source and passes control to intr_execute_handlers().
2003-11-03 21:34:45 +00:00
John Baldwin
a8084030ad Add a per-thread variable for saving the state of eflags to support the
critical section code.
2003-11-03 21:30:00 +00:00
John Baldwin
8c9799d31f Allocate space for the intrcnt array. This array is managed in the
interrupt code layer as interrupt sources are added and handlers added
to those sources.
2003-11-03 21:28:54 +00:00
John Baldwin
ecee5704ed New device interrupt code. This defines an interrupt source abstraction
that provides methods via a PIC driver to do things like mask a source,
unmask a source, enable it when the first interrupt handler is added, etc.
The interrupt code provides a table of interrupt sources indexed by IRQ
numbers, or vectors.  These vectors are what new-bus uses for its IRQ
resources and for bus_setup_intr()/bus_teardown_intr().  The interrupt
code then maps that vector a given interrupt source object.  When an
interrupt comes in, the low-level interrupt code looks up the interrupt
source for the source that triggered the interrupt and hands it off to
this code to execute the appropriate handlers.

By having an interrupt source abstraction, this allows us to have different
types of interrupt source providers within the shared IRQ address space.
For example, IRQ 0 may map to pin 0 of the master 8259A PIC, IRQs 1
through 60 may map to pins on various I/O APICs, and IRQs 120 through
128 may map to MSI interrupts for various PCI devices.
2003-11-03 21:25:52 +00:00
John Baldwin
5b02e68554 - Always use 256 IDT entries since it is now a runtime decison as to how
many entries we use.
- Add a constant IDT_IO_INTS for the first IDT entry used for device
  interrupts.
2003-11-03 21:12:04 +00:00
John Baldwin
e14243fac7 Move the NMI handling code out to its own file. 2003-11-03 21:10:17 +00:00
John Baldwin
5eb39b8d24 Define IDTVEC() and TRAP() assembly macros so that they can be shared
with several files.
2003-11-03 21:09:17 +00:00
John Baldwin
eb2a2211ff Revert the critical section implementation to disable interrupts via
cli/sti now that we support many more than 32 interrupt sources.
2003-11-03 21:06:54 +00:00
John Baldwin
8d8dbef5ac Remove soon to be obsolete file to break kernel build while the new
interrupt code comes in.
2003-11-03 21:00:34 +00:00
David E. O'Brien
b05170b6d7 Add AMD Features NX and LM. 2003-11-03 14:59:05 +00:00
Poul-Henning Kamp
5843f50d9b Change /dev/soekris-errled to be /dev/led/error and make it conditional
on CPU_SOEKRIS.

Note the subtle change in semantfics for 'f%d' flash instruction and the
new morse facility (see details in dev/led/led.c)
2003-11-03 11:03:40 +00:00
Poul-Henning Kamp
1c66457ee5 Introduce new CPU_SOEKRIS option to tell soekris hardware from other
hardware based on similar chipsets.
2003-11-03 10:34:40 +00:00
Poul-Henning Kamp
8dd85c33e3 Free major#100 2003-11-03 10:19:33 +00:00
Nate Lawson
00295e7473 Fix the logic to match the new name of the tunable.
Pointed out by:	iwasaki
2003-11-01 01:05:53 +00:00
Nate Lawson
cc65a50cc5 Change the reset video option to be positive (hw.acpi.reset_video).
Requested by:	jhb

Initialize the real mode stack.  This is needed at least for the return
address from the lcall.
Requested by:	takawata

Fix style bugs in acpi_wakecode.S
Requested by:	bde

Remove the kernel option now that we have the tunable.
2003-11-01 00:18:29 +00:00
John Baldwin
cd7ccabe44 For physical address regions between 0 and KERNLOAD, allow pmap_mapdev()
to use the direct mapped KVA at KERNBASE to service the request.  This also
allows pmap_mapdev() to be used for such addresses very early during the
boot process and might provide some small savings on KVA.

Reviewed by:	peter
2003-10-31 21:02:04 +00:00
John Baldwin
221111f6f2 Lower the priority of the legacy host to pci bridge driver so that other
non-ACPI host-bridge drivers can preempt this driver.
2003-10-31 21:00:37 +00:00
Brooks Davis
9bf40ede4a Replace the if_name and if_unit members of struct ifnet with new members
if_xname, if_dname, and if_dunit. if_xname is the name of the interface
and if_dname/unit are the driver name and instance.

This change paves the way for interface renaming and enhanced pseudo
device creation and configuration symantics.

Approved By:	re (in principle)
Reviewed By:	njl, imp
Tested On:	i386, amd64, sparc64
Obtained From:	NetBSD (if_xname)
2003-10-31 18:32:15 +00:00
John Baldwin
b62911f8dd - Finish externing of r_idt in the f00f hack code.
- Miscellaneous style fixes in the f00f hack code and some nearby code.

Submitted by:	bde
2003-10-31 14:24:28 +00:00
Peter Wemm
d49aa1354b Change the pmap_invalidate_xxx() functions so they test against
pmap == kernel_pmap rather than pmap->pm_active == -1.  gcc's inliner
can remove more code that way.  Only kernel_pmap has a pm_active of -1.
2003-10-30 22:15:22 +00:00
John Baldwin
1ab9ea3059 Include "opt_pmap.h" so that the DISABLE_P* options are honored. 2003-10-30 21:42:44 +00:00
John Baldwin
63239aa581 Always export r_gdt and r_idt and give them extern declarations in
machine/segments.h.
2003-10-30 21:42:17 +00:00
Brooks Davis
c020a92f9f There is no way to enter the attach routine twice with the same softc
without a detach call in between so don't try to deal with that
possiability.

This is a diff-reduction commit for the upcoming if_xname conversion.
2003-10-30 19:45:58 +00:00
Mitsuru IWASAKI
fbbdf7c7d2 Add sysctl MIB and loader tunable `hw.acpi.no_reset_video' as
the same effect as ACPI_NO_RESET_VIDEO kernel option.
2003-10-30 16:14:55 +00:00
David Xu
7eeaaf9b97 Try to fetch thread mailbox address in page fault trap, so when thread
blocks in page fault hanlder, and upcall thread can be scheduled. It is
useful if process is doing lots of mmap based I/O.
2003-10-30 02:55:43 +00:00
Mitsuru IWASAKI
d63ab51a51 Alphabetical order for ACPI options broken by adding ACPI_NO_RESET_VIDEO.
Add short comment about ACPI_NO_RESET_VIDEO into NOTES.

Pointed-out by:	njl
2003-10-29 14:22:09 +00:00
Mitsuru IWASAKI
92781c3567 Add kernel option ACPI_NO_RESET_VIDEO as workaround for problems
(e.g. LCD white-out after resume) on some machine cased by
re-initialize video BIOS code in acpi_wakecode.
2003-10-29 03:30:45 +00:00
John Baldwin
2e81e660b4 Fix pmap_unmapdev() to call pmap_kremove() instead of implementing it
directly so that it more closely mirrors pmap_mapdev() which calls
pmap_kenter().
2003-10-27 22:15:02 +00:00
Nate Lawson
450b6ff66f Call the VESA reset BIOS vector on the resume path. This may help displays
after resume.  I have not found it to break anything.
2003-10-27 06:26:51 +00:00
Nate Lawson
eb4f7a817c Fix style problems with new options.
Requested by:	bde
2003-10-27 02:42:08 +00:00
Peter Wemm
f3075be88a For the SMP case, flush the TLB at the beginning of the page zero/copy
routines.  Otherwise we run into trouble with speculative tlb preloads
on SMP systems.  This effectively defeats Jeff's revision 1.438
optimization (for his pentium4-M laptop) in the SMP case.  It breaks
other systems, particularly athlon-MP's.
2003-10-25 18:51:41 +00:00
Peter Wemm
b09a77f561 GC workaround code for detecting pentium4's and disabling PSE and PG_G.
It's been ifdef'ed out for ages.
2003-10-25 05:14:38 +00:00
John Baldwin
07930cce05 A few whitespace and comment tweaks. 2003-10-24 21:02:26 +00:00
John Baldwin
fe38ebca56 - Fail to probe if acpi0 probed ok as this driver basically tries to probe
the ACPI timer and we shouldn't do that if ACPI is already around to do
  that for us.
- Set a description and tweak the order of checks in the probe function
  to more closely match other PCI drivers.

This should probably be moved to sys/dev/piix/piix.c at some point and
turned on for all i386 kernels rather than just SMP ones.
2003-10-24 21:01:31 +00:00
Nate Lawson
3c0014e8ae Add the ACPICA_PEDANTIC option which is off by default. Enabling it will
enable strict checks of the AML.  Our default behavior will be to relax
checks to work on as many platforms as possible.  Also clean up and document
other ACPI options while I'm here.
2003-10-22 22:27:49 +00:00
Mike Silbersack
184dcdc7c8 Change all SYSCTLS which are readonly and have a related TUNABLE
from CTLFLAG_RD to CTLFLAG_RDTUN so that sysctl(8) can provide
more useful error messages.
2003-10-21 18:28:36 +00:00
David Xu
d5e1f581ff Use npxdrop in cpu_thread_exit to save some cycles.
Clear FPU pcb flags for new upcall thread, these flags needn't
be inherited, the new thread should start from clean FPU status.
2003-10-19 00:57:10 +00:00
Nate Lawson
4c3655b418 Add the cpu_idle_hook() function pointer so that other idlers can be
hooked at runtime.  Make C1 sleep (e.g., HLT) be the default.  This
prepares the way for further ACPI sleep states.
2003-10-18 22:25:07 +00:00
Bruce Evans
ed86674a3d Don't forget to load %es with the kernel data segment selector in
Xcpustop().  %es is used in at least the call to savectx() when savectx()
calls bcopy(), so not loading it was fatal if a stop IPI interrupts
user mode.

This reduces bugs starting and stopping CPUs for debuggers.  CPUs are
stopped mainly in kdb_trap() and cpu_reset().  At reset time there is
a good chance that all the CPUs are in the kernel, so the bug was
probably harmless then.
2003-10-16 10:44:24 +00:00
Doug Rabson
5f16902f7e Add a workaround for the fact that the priv field was removed from
struct driver. We were the last user of that field (and we are scheduled
for demolition) so there wasn't much point in keeping it.
2003-10-16 09:18:35 +00:00
Peter Wemm
6f366f87e6 Get some more data if we hit the pmap_enter() thing. 2003-10-15 00:45:35 +00:00
Peter Wemm
c513c3b569 Fix just about as many bugs in my last commit here as there were lines that
I changed.  That is never a good sign.
1) only map 1 page at address zero, not 4096 pages
2) page 1 starts at address 4096 (PAGE_SIZE) not 4095 (PAGE_MASK).  I
   don't even want to think what the pte's looked like.
3) subtract the r/o page group start address from the end before
   converting it to a count.  Otherwise an extra page is mapped.

If you were affected by this, the symptoms of this was a hang at boot
after the spinner.  Sorry folks. :-(

"You broke my laptop!" by:	sam
2003-10-14 17:02:18 +00:00
Alan Cox
50ac3f9939 - Modify pmap_is_current() to return FALSE when a pmap's page table is in
use because a kernel thread is borrowing it.  The borrowed page table
   can change spontaneously, making any dependence on its continued use
   subject to a race condition.
 - _pmap_unwire_pte_hold() cannot use pmap_is_current(): If a change is
   made to a page table page mapping for a borrowed page table, the TLB
   must be updated.

In collaboration with:	tegge
2003-10-13 03:28:31 +00:00
Poul-Henning Kamp
9b993f8210 Initialize CMAP3 to 0 2003-10-12 10:55:45 +00:00
Tim J. Robbins
a95edcba94 Fix a multitude of security bugs in the iBCS2 emulator:
- Return NULL instead of returning memory outside of the stackgap
  in stackgap_alloc() (FreeBSD-SA-00:42.linux)
- Check for stackgap_alloc() returning NULL in ibcs2_emul_find();
  other calls to stackgap_alloc() have not been changed since they
  are small fixed-size allocations.
- Replace use of strcpy() with strlcpy() in exec_coff_imgact()
  to avoid buffer overflow
- Use strlcat() instead of strcat() to avoid a one byte buffer
  overflow in ibcs2_setipdomainname()
- Use copyinstr() instead of copyin() in ibcs2_setipdomainname()
  to ensure that the string is null-terminated
- Avoid integer overflow in ibcs2_setgroups() and ibcs2_setgroups()
  by checking that gidsetsize argument is non-negative and
  no larger than NGROUPS_MAX.
- Range-check signal numbers in ibcs2_wait(), ibcs2_sigaction(),
  ibcs2_sigsys() and ibcs2_kill() to avoid accessing array past
  the end (or before the start)
2003-10-12 04:25:26 +00:00
Peter Wemm
c369afae3f Set page zero read/write right from the start rather than trying to
change it later on.
2003-10-10 23:35:15 +00:00
Peter Wemm
4dab350282 Move the pmap_kenter(KERNBASE, 0) a bit earlier so that it works for
the hasbrokenint12 tunable case too.  (with some related and unrelated
style fixes)

Submitted by:  bde
2003-10-10 17:43:42 +00:00
Robert Drehmel
ea924c4cd3 Implement preliminary support for the PT_SYSCALL command to ptrace(2). 2003-10-09 10:17:16 +00:00
Bruce M Simpson
2bc7dd5661 Move pmap_resident_count() from the MD pmap.h to the MI pmap.h.
Add a definition of pmap_wired_count().
Add a definition of vmspace_wired_count().

Reviewed by:	truckman
Discussed with:	peter
2003-10-06 01:47:12 +00:00
Alan Cox
ab87e2fb83 Don't bother setting a page table page's valid field. It is unused and
not setting it is consistent with other uses of VM_ALLOC_NOOBJ pages.
2003-10-05 00:12:16 +00:00
Peter Wemm
b63331a498 Fix the apm problem for real. We leave the first 4K page for the bios to
work in, but we had it mapped read-only.  While this has always been the
case, the PG_PS enable hack hid it and the apm bios code ended up taking
advantage of it.
2003-10-04 22:04:54 +00:00
Jeff Roberson
478042909d - The proper test is CPU_ENABLE_SSE and not CPU_ENABLED_SSE. This
effectively disabled the sse2_pagezero() code.

Spotted by:	bde
2003-10-04 13:07:53 +00:00
Peter Wemm
708b44ba6f Emulate bugs in the old PSE code so that apm works again.
I do not yet understand why, but apm *depended* on the fact that the old
PSE code caused the first 1MB of ram to be mapped read/write because it
was in the same 4MB page as the kernel text+data+bss blob.

If anybody ever tried DISABLE_PSE before, apm would not work.

If your cpu did not have PSE, apm would not work there either (eg: 486).

This bug has been around for a Very Long Time.

The Pentium-4-fix commits did not emulate this unintended side effect of
the PSE post-early-boot fixup, and thus apm blew up.  I've added a hack to
emulate the bug until either apm is fixed or we set fire to our bridges.

This is bad though because it gives kernel mode code the opportunity
to accidently write to the first few megs of the general page pool
which is remapped at KERNBASE.  It needs to be fixed properly.
2003-10-04 06:30:56 +00:00
Alan Cox
566526a957 Migrate pmap_prefault() into the machine-independent virtual memory layer.
A small helper function pmap_is_prefaultable() is added.  This function
encapsulate the few lines of pmap_prefault() that actually vary from
machine to machine.  Note: pmap_is_prefaultable() and pmap_mincore() have
much in common.  Going forward, it's worth considering their merger.
2003-10-03 22:46:53 +00:00