Commit Graph

9615 Commits

Author SHA1 Message Date
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
Peter Wemm
cd349af148 Add #include "opt_pmap.h" so locore picks up DISABLE_PSE etc options. 2003-10-03 14:33:00 +00:00
Peter Wemm
6ccf265bb0 Commit Bosko's patch to clean up the PSE/PG_G initialization to and
avoid problems with some Pentium 4 cpus and some older PPro/Pentium2
cpus.  There are several problems, some documented in Intel errata.
This patch:
1) moves the kernel to the second page in the PSE case.  There is an
errata that says that you Must Not point a 4MB page at physical
address zero on older cpus.  We avoided bugs here due to sheer luck.
2) sets up PSE page tables right from the start in locore, rather than
trying to switch from 4K to 4M (or 2M) pages part way through the boot
sequence at the same time that we're messing with PG_G.

For some reason, the pmap work over the last 18 months seems to tickle
the problems, and the PAE infrastructure changes disturb the cpu
bugs even more.

A couple of people have reported a problem with APM bios calls during
boot.  I'll work with people to get this resolved.

Obtained from:	bmilekic
2003-10-01 23:46:08 +00:00
Jeff Roberson
460c513686 - Add a memory barrier before the sse2_pagezero() function returns. This
code uses write combining which must be committed to memory prior to
   other uses of this page.

Spotted by:	alc
2003-10-01 08:52:46 +00:00
Jeff Roberson
1419773de3 - Hide more #ifdef logic in a new invlcaddr inline. This function flushes
the full tlb if you're on an I386or does an invlpg otherwise.

Glanced at by:	peter
2003-10-01 05:56:46 +00:00
Jeff Roberson
043407f803 - Define an inline pagezero() to select the appropriate full-page zeroing
function from one of bzero, i686_pagezero, or sse2_pagezero.
 - Use pagezero() in the three pmap functions that need to zero full pages.
2003-10-01 05:42:58 +00:00
Jeff Roberson
977f9ab515 - Add ss2_pagezero() for zeroing pages using the movnti instruction. This
instruction is enabled with SSE2 but does not use SSE registers.  It is a
   "non-temporal" move which bypasses the cache and does not dirty lines.
2003-10-01 05:25:27 +00:00
Jeff Roberson
fb9bde2d2b - Correct a problem with the last commit. The CMAP ptes need to be zeroed
prior to invalidating the TLB to be certain that the processor doesn't
   keep a cached copy.

Discussed with:	pete
Paniced:	tegge
Pointy Hat:	The usual spot
2003-10-01 00:27:09 +00:00
Jeff Roberson
fa3f9daae5 - On my Pentium4-M laptop, invalpg takes ~1100 cycles if the page is found in
the TLB and ~1600 if it is not.  Therefore, it is more effecient to
   invalidate the TLB after operations that use CMAP rather than before.
 - So that the tlb is invalidated prior to switching off of a processor, we
   must change the switchin functions to switchout functions.
 - Remove td_switchout from the thread and move it to the x86 pcb.
 - Move the code that calls switchout into swtch.s.  These changes make this
   optimization truely x86 specific.
2003-09-30 08:11:36 +00:00
Jeff Roberson
f75766288d - Correct a typo in a comment. 2003-09-30 04:51:12 +00:00
Bruce Evans
fa2e26c437 MFsio (sio.c 1.413: cleaned up and fixed setting of speeds in comparam()).
This is just a cleanup here (modulo rev.1.108 of kern/tty.c), since the
input speed can be different from to output speed and extra code to
handle both speeds naturally handled all cases.
2003-09-27 12:40:23 +00:00
Poul-Henning Kamp
70cd771337 The present defaults for the open and close for device drivers which
provide no methods does not make any sense, and is not used by any
driver.

It is a pretty hard to come up with even a theoretical concept of
a device driver which would always fail open and close with ENODEV.

Change the defaults to be nullopen() and nullclose() which simply
does nothing.

Remove explicit initializations to these from the drivers which
already used them.
2003-09-27 12:01:01 +00:00
Bruce Evans
7872ac5542 Quick fix for bitrot in locking in the SMP case. cd_getreg() and
cd_setreg() were still using !(read_eflags() & PSL_I) as the condition
for the lock hidden by COM_LOCK() (if any) being held.  This worked
when spin mutexes and/or critical_enter() used hard interrupt disablement,
but it has caused recursion on the non-recursive mutex com_mtx since
all relevant interrupt disablement became soft.  The recursion is
harmless unless there are other bugs, but it breaks an invariant so
it is fatal if spinlocks are witnessed.
2003-09-27 10:30:03 +00:00
Alan Cox
4487ff65db Addendum to the previous revision: If vm_page_alloc() for the page
table page fails, perform a VM_WAIT; update some comments in
_pmap_allocpte().
2003-09-27 05:44:53 +00:00
Poul-Henning Kamp
3623186cbc Initialize cn_name, ignore cn_dev. 2003-09-26 08:51:54 +00:00
Alan Cox
f3fd831cdd - Eliminate the pte object.
- Use kmem_alloc_nofault() rather than kmem_alloc_pageable() to allocate
   KVA space for the page directory page(s).  Submitted by: tegge
2003-09-25 02:51:06 +00:00
Peter Wemm
c460ac3a00 Add sysentvec->sv_fixlimits() hook so that we can catch cases on 64 bit
systems where the data/stack/etc limits are too big for a 32 bit process.

Move the 5 or so identical instances of ELF_RTLD_ADDR() into imgact_elf.c.

Supply an ia32_fixlimits function.  Export the clip/default values to
sysctl under the compat.ia32 heirarchy.

Have mmap(0, ...) respect the current p->p_limits[RLIMIT_DATA].rlim_max
value rather than the sysctl tweakable variable.  This allows mmap to
place mappings at sensible locations when limits have been reduced.

Have the imgact_elf.c ld-elf.so.1 placement algorithm use the same
method as mmap(0, ...) now does.

Note that we cannot remove all references to the sysctl tweakable
maxdsiz etc variables because /etc/login.conf specifies a datasize
of 'unlimited'.  And that causes exec etc to fail since it can no
longer find space to mmap things.
2003-09-25 01:10:26 +00:00
Warner Losh
00dc18b5a8 Per TRB vote: restore the aquire_timer0 and associated goo. This will
be gone in FreeBSD 6, so put BURN_BRIDGES around it.  The TRB also
felt that if something better comes along sooner, it can be used to
replace this code.

Delayed by: BSDcon and subsequent disk crash.
2003-09-24 15:33:33 +00:00
Yoshihiro Takahashi
33e38a2cc8 Implement the bus_space_map() function to allocate resources and initialize
a bus_handle, but currently it does only initializing a bus_handle.
2003-09-23 08:22:34 +00:00
Peter Wemm
795a3f5279 Microoptimization to allow the compiler to evaluate ntohl() etc on
known constants at compile time rather than at run time.  We have a number
of nasty hacks around the place to cache ntohl() of constants (eg: nfs).
This change allows the compiler to compile-time evaluate ntohl(1) as
0x01000000 rather than having to emit assembler code to do it.  This
has other smaller flow-on effects because the compiler can see that
ntohl(constant) itself has a constant value now and can propagate the
compile time evaluation.

Obtained from:  Ideas from NetBSD and Linux, and some code from NetBSD
2003-09-22 21:46:47 +00:00
Alan Cox
be19fdd17e Allocate the page table directory page(s) as "no object" pages. (This
leaves one explicit use of the pte object.)
2003-09-21 21:36:13 +00:00
Alan Cox
f8363bdee9 Reimplement pmap_release() such that it uses the page table rather than the
pte object to locate the page table directory pages.  (This is another step
toward the elimination of the pte object.)
2003-09-20 23:54:36 +00:00
Joerg Wunsch
9678710b1f Mention the puc(4) glue driver in a commented-out example so the user
of "dumb" PCI-based serial/parallel boards get a hint how to enable
them.

I wasn't sure about the ia64, pc98, powerpc, and sparc64 archs whether
they'd support puc(4) or not.
2003-09-19 20:04:55 +00:00
Sam Leffler
f4659f863c add Atheros driver 2003-09-19 01:42:24 +00:00
John Baldwin
eb975edd06 Fix a busted constant related to PCI configuration acess method #1. The
reserved bits in the port that must be zero are 24:30, not 20:30.  Bits
16:23 are used to set the bus number.  This meant that when we tested for
config mechanism #1, if the previous PCI configuration transaction sent
used a bus number greater than 15, one of the bits in 20:23 would be
non-zero and we would fail to use config mechanism #1 and thus fail to see
that PCI existed on the machine at all.

Obtained from:	Shanley's PCI System Architecture book
Tested by:	des
Proxied through:	njl
2003-09-18 17:00:03 +00:00
Bruce Evans
b6fab1eae2 Don't forget to reenable interrupts after a breakpoint and trace traps from
user mode.  This goes with rev.1.468 of machdep.c which changed the gates
for these traps to interrupt gates.  Having the interrupts disabled for
these traps from user mode is just an unwanted side effect.

This fixes at least 1 case of "panic: absolutely cannot call
smp_ipi_shootdown with interrupts already disabled".  Too much code was
run with interrupts disabled, and it sometimes hit a sanity check.

Fix verified by:	deischen
2003-09-18 07:01:30 +00:00
Mitsuru IWASAKI
d099a9d164 Add final adjustment code of battery status based on the battery capacity
rather than returning unknown status.
2003-09-17 08:47:39 +00:00
Alan Cox
6d66d714c7 Simplify (and micro-optimize) pmap_unuse_pt(): Only one caller,
pmap_remove_pte(), passed NULL instead of the required page table
page to pmap_unuse_pt().  Compute the necessary page table page
in pmap_remove_pte().  Also, remove some unreachable code from
pmap_remove_pte().
2003-09-13 21:57:38 +00:00
Alan Cox
b9850eb224 Add a new parameter to pmap_extract_and_hold() that is needed to eliminate
Giant from vmapbuf().

Idea from:	tegge
2003-09-12 07:07:49 +00:00
David E. O'Brien
3fc40c2484 Sort 'bge' correctly. 2003-09-10 18:54:59 +00:00
John Baldwin
bbdaad6fee Whitespace. 2003-09-10 07:09:16 +00:00
John Baldwin
810cb9ef5e We represent PCI intpin's two different ways. One is the way that the
intpin register is expressed in hardware where 0 means none, 1 means INTA,
2 INTB, etc.  The other way is commonly used in loops where 0 means INTA,
1 means INTB, etc.  The matchpin argument to pci_cfgintr_search() is
supposed to be the first form, but we passsed in a loop index of the
second.  This fix adds one to the loop index to convert to the first form.

Reported by:	Pavlin Radoslavov <pavlin@icir.org>
2003-09-10 06:00:53 +00:00
John Baldwin
a7321ecb19 Finish an earlier commit:
Add a acpi_SetDefaultIntrModel() method to allow drivers to set the
interrupt model prior to the acpi0 device being probed and attached.
2003-09-10 05:29:30 +00:00
John Baldwin
a547af297d Remove an XXX comment by using the per CPU mask added after this comment
was added.
2003-09-10 01:36:48 +00:00
John Baldwin
4c93af3788 Add a acpi_SetDefaultIntrModel() method to allow drivers to set the
interrupt model prior to the acpi0 device being probed and attached.
2003-09-10 01:14:42 +00:00
John Baldwin
f03cb48d41 Fix a typo. 2003-09-10 01:11:58 +00:00
John Baldwin
674e1d4532 Add comments to the members of the timecounter struct similar to other
timecounters.
2003-09-10 01:10:24 +00:00
John Baldwin
0e85b19ba9 Add constants for entries in the IDT and use those instead of magic
numbers.
2003-09-10 01:07:04 +00:00
Bill Paul
b9f78d2b4a Add a device driver for the Broadcom BCM4401 ethernet controller,
written by Stuart Walsh and Duncan Barclay (with some kibbitzing by
me). I'm checking it in on Stuart's behalf.

The BCM4401 is built into several x86 laptop and desktop systems. For the
moment, I have only enabled it in the x86 kernel config because although
it's a PCI device, I haven't heard of any standalone NICs that use it. If
somebody knows of one, we can easily add it to the other arches.

This driver uses register/structure data gleaned from the Linux
driver released by Broadcom, but does not contain any of the code
from the Linux driver itself. It uses busdma.
2003-09-09 18:17:23 +00:00
Scott Long
5fdcb0a62e Re-arrange the raid section a small bit and put drivers into their proper
category.
2003-09-09 06:36:32 +00:00
Eric Anholt
a1810e1513 Hook the SiS DRM up to the build
Sponsored by:	LinuxFund
2003-09-09 00:29:02 +00:00
Nate Lawson
bf10d4f8c4 Don't disable interrupts a second time. Remove an extraneous interrupt
enable (that happens elsewhere).  Clarify the interrupt disabling point
by using ACPI_DISABLE_IRQS().

Tested by:	Kevin Oberman
2003-09-08 06:22:54 +00:00
Alan Cox
ba2157f218 Introduce a new pmap function, pmap_extract_and_hold(). This function
atomically extracts and holds the physical page that is associated with the
given pmap and virtual address.  Such a function is needed to make the
memory mapping optimizations used by, for example, pipes and raw disk I/O
MP-safe.

Reviewed by:	tegge
2003-09-08 02:45:03 +00:00
Bill Paul
a94100fa9b Take the support for the 8139C+/8169/8169S/8110S chips out of the
rl(4) driver and put it in a new re(4) driver. The re(4) driver shares
the if_rlreg.h file with rl(4) but is a separate module. (Ultimately
I may change this. For now, it's convenient.)

rl(4) has been modified so that it will never attach to an 8139C+
chip, leaving it to re(4) instead. Only re(4) has the PCI IDs to
match the 8169/8169S/8110S gigE chips. if_re.c contains the same
basic code that was originally bolted onto if_rl.c, with the
following updates:

- Added support for jumbo frames. Currently, there seems to be
  a limit of approximately 6200 bytes for jumbo frames on transmit.
  (This was determined via experimentation.) The 8169S/8110S chips
  apparently are limited to 7.5K frames on transmit. This may require
  some more work, though the framework to handle jumbo frames on RX
  is in place: the re_rxeof() routine will gather up frames than span
  multiple 2K clusters into a single mbuf list.

- Fixed bug in re_txeof(): if we reap some of the TX buffers,
  but there are still some pending, re-arm the timer before exiting
  re_txeof() so that another timeout interrupt will be generated, just
  in case re_start() doesn't do it for us.

- Handle the 'link state changed' interrupt

- Fix a detach bug. If re(4) is loaded as a module, and you do
  tcpdump -i re0, then you do 'kldunload if_re,' the system will
  panic after a few seconds. This happens because ether_ifdetach()
  ends up calling the BPF detach code, which notices the interface
  is in promiscuous mode and tries to switch promisc mode off while
  detaching the BPF listner. This ultimately results in a call
  to re_ioctl() (due to SIOCSIFFLAGS), which in turn calls re_init()
  to handle the IFF_PROMISC flag change. Unfortunately, calling re_init()
  here turns the chip back on and restarts the 1-second timeout loop
  that drives re_tick(). By the time the timeout fires, if_re.ko
  has been unloaded, which results in a call to invalid code and
  blows up the system.

  To fix this, I cleared the IFF_UP flag before calling ether_ifdetach(),
  which stops the ioctl routine from trying to reset the chip.

- Modified comments in re_rxeof() relating to the difference in
  RX descriptor status bit layout between the 8139C+ and the gigE
  chips. The layout is different because the frame length field
  was expanded from 12 bits to 13, and they got rid of one of the
  status bits to make room.

- Add diagnostic code (re_diag()) to test for the case where a user
  has installed a broken 32-bit 8169 PCI NIC in a 64-bit slot. Some
  NICs have the REQ64# and ACK64# lines connected even though the
  board is 32-bit only (in this case, they should be pulled high).
  This fools the chip into doing 64-bit DMA transfers even though
  there is no 64-bit data path. To detect this, re_diag() puts the
  chip into digital loopback mode and sets the receiver to promiscuous
  mode, then initiates a single 64-byte packet transmission. The
  frame is echoed back to the host, and if the frame contents are
  intact, we know DMA is working correctly, otherwise we complain
  loudly on the console and abort the device attach. (At the moment,
  I don't know of any way to work around the problem other than
  physically modifying the board, so until/unless I can think of a
  software workaround, this will have do to.)

- Created re(4) man page

- Modified rlphy.c to allow re(4) to attach as well as rl(4).

Note that this code works for the sample 8169/Marvell 88E1000 NIC
that I have, but probably won't work for the 8169S/8110S chips.
RealTek has sent me some sample NICs, but they haven't arrived yet.
I will probably need to add an rlgphy driver to handle the on-board
PHY in the 8169S/8110S (it needs special DSP initialization).
2003-09-08 02:11:25 +00:00
Bruce Evans
4df0520624 clock.c:
Quick fix for calling DELAY() for ddb input in some (atkbd-based)
console drivers.  ddb must not use any normal locks, but DELAY()
normally calls getit() which needs clock_lock.  One problem with using
normal locks in ddb is that deadlock is possible, but deadlock on
clock_lock is unlikely becaluse clock_lock is bogusly recursive,
apparently just to hide the problem of ddb using it.  The i8254 clock
hardware has mostly write-only registers so it is important for it to
use a lock that gives exclusive access.  (atkbd hardware is also
unfriendly to reentrant software but that problem is more local and
already solved.)  I mostly saw the symptoms of the bug caused by
unlocking in getit() running cpu_unpend().  cpu_unpend() should not
be called while in ddb and Debugger() calls for failing assertions
about this caused a breakpoint within ddb.

ddb must also not call getit() because ddb may be being used to step
through clock initialization code that has stopped or otherwise mangled
the clock.  If the clock is stopped, then getit() always returns the
same value and DELAY() takes forever if it trusts getit().

The quick fix is implement DELAY(n) as (n * timer_freq / 1000000)
inb(0x84)'s if ddb is active.

machdep.c:
Don't permit recursion on clock_lock.
2003-09-07 14:23:08 +00:00
Bruce Evans
8aa1e716af Moved stop/start code for other CPUs to near the beginning/end of
kdb_trap().  Stopping the other CPUs acts like locking them out, but
it wasn't done early enough or held long enough to prevent concurrent
accesses to shared data.  In particular, the saved regs could be
clobbered.
2003-09-07 13:43:01 +00:00
Bruce Evans
2cf50c62a6 Restored non-egregious casts so that this file compiles on i386's with
64-bit longs again.
2003-09-07 13:23:45 +00:00
David Xu
75764c27a8 Turning on warning for static LDT allocation. 2003-09-07 05:23:28 +00:00
Peter Wemm
116b8c8695 Mark the isa compat shims for BURN_BRIDGES for 6.0 2003-09-05 14:55:11 +00:00
Peter Wemm
b324e86370 Clean up some antique stuff. We do not support Weitek FPUs etc, and never
did.
2003-09-05 14:54:26 +00:00
Poul-Henning Kamp
753374dad4 Give the ELAN timecounter better quality than i8254 2003-09-03 08:13:12 +00:00
Alexander Kabaev
1d49585050 Standardize idempotentcy ifdefs. Consistently use _MACHINE_VARARGS_H_
symbol.
2003-09-01 03:01:45 +00:00
Poul-Henning Kamp
f633e00615 Detect Geode CPUs and initialize the 27MHz timecounter "Geode".
This timecounter is 2usec faster than the i8254 and has 22 times
better resolution.
2003-08-31 16:20:34 +00:00
Alan Cox
411d10a600 Migrate the sf_buf allocator that is used by sendfile(2) and zero-copy
sockets into machine-dependent files.  The rationale for this
migration is illustrated by the modified amd64 allocator.  It uses the
amd64's direct map to avoid emphemeral mappings in the kernel's
address space.  On an SMP, the emphemeral mappings result in an IPI
for TLB shootdown for each transmitted page.  Yuck.

Maintainers of other 64-bit platforms with direct maps should be able
to use the amd64 allocator as a reference implementation.
2003-08-29 20:04:10 +00:00
Nate Lawson
ad1fdf57d2 Use the ACPICA AcpiEnterSleepStateS4bios instead of rolling our own. This
change also disables interrupts around non-S4 suspends whereas before we
did not do this.  Our version of AcpiEnterSleepStateS4bios was almost
identical to the ACPICA version.
2003-08-29 04:02:19 +00:00
John Baldwin
729d7ffbcf - Rename PCIx_HEADERTYPE* to PCIx_HDRTYPE* so the constants aren't so long.
- Add a new PCIM_HDRTYPE constant for the field in PCIR_HDRTYPE that holds
  the header type.
- Replace several magic numbers with appropriate constants for the header
  type register and a couple of PCI_FUNCMAX.
- Merge to amd64 the fix to the i386 bridge code to skip devices with
  unknown header types.

Requested by:	imp (1, 2)
2003-08-28 21:22:25 +00:00
Nate Lawson
cacbbaa703 Style cleanups. 2003-08-28 16:26:24 +00:00
David E. O'Brien
a7b60ab26e Fix copyright comment & FBSDID style nits.
Requested by:	bde
2003-08-25 09:48:48 +00:00
Yoshihiro Takahashi
f2a610fa25 Fix compile error. 2003-08-25 08:13:07 +00:00
Søren Schmidt
9250b177b5 Add device ataraid, this is now seperate and not pulled in by atadisk. 2003-08-24 09:30:13 +00:00
Warner Losh
afe1c7ba84 Even though this driver says it is broken, fix the location of the pci
include files.
2003-08-23 16:59:16 +00:00
Warner Losh
19b7ffd1b8 Prefer new location of pci include files (which have only been in the
tree for two or more years now), except in a few places where there's
code to be compatible with older versions of FreeBSD.
2003-08-22 07:20:27 +00:00
Alan Cox
3c5a69f7d0 Eliminate the last (direct) use of vm_page_lookup() on the pte object. 2003-08-22 05:49:29 +00:00
Alan Cox
1e584e46be Eliminate a possible race condition for multithreaded applications in
_pmap_allocpte(): Guarantee that the page table page is zero filled before
adding it to the directory.  Otherwise, a 2nd, 3rd, etc. thread could
access a nearby virtual address and use garbage for the address
translation.

Discussed with:	peter, tegge
2003-08-19 18:20:34 +00:00
Sam Leffler
d5882c1117 remove #define no longer used 2003-08-19 17:12:21 +00:00
John Baldwin
f13ba3ccc0 Add missing header include for MSR macros.
Submitted by:	bde
2003-08-18 17:01:04 +00:00
Alan Cox
90ca070d69 Acquire the pte object's mutex when performing vm_page_grab(). Note: It is
my long-term objective to eliminate the pte object.  In the near term, this
does, however, enable the addition of some vm object locking assertions.
2003-08-17 22:27:30 +00:00
Gordon Tetlow
df3d69c217 Fixup the ELF branding information to point to the new home of rtld. 2003-08-17 08:08:38 +00:00
Alan Cox
365b27ea29 In pmap_copy(), since we have the page table page's physical address
in hand, use PHYS_TO_VM_PAGE() rather than vm_page_lookup().
2003-08-17 04:48:21 +00:00
Marcel Moolenaar
710338e94f In vm_thread_swap{in|out}(), remove the alpha specific conditional
compilation and replace it with a call to cpu_thread_swap{in|out}().
This allows us to add similar code on ia64 without cluttering the
code even more.
2003-08-16 23:15:15 +00:00
Marcel Moolenaar
26502503e5 Further cleanup <machine/cpu.h> and <machine/md_var.h>: move the MI
prototypes of cpu_halt(), cpu_reset() and swi_vm() from md_var.h to
cpu.h. This affects db_command.c and kern_shutdown.c.

ia64: move all MD prototypes from cpu.h to md_var.h. This affects
madt.c, interrupt.c and mp_machdep.c. Remove is_physical_memory().
It's not used (vm_machdep.c).

alpha: the MD prototypes have been left in cpu.h with a comment
that they should be there. Moving them is left for later. It was
expected that the impact would be significant enough to be done in
a seperate commit.

powerpc: MD prototypes left in cpu.h. Comment added.

Suggested by: bde
Tested with: make universe (pc98 incomplete)
2003-08-16 16:57:57 +00:00
Poul-Henning Kamp
78a49a45bc Give timecounters a numeric quality field.
A timecounter will be selected when registered if its quality is
not negative and no less than the current timecounters.

Add a sysctl to report all available timecounters and their qualities.

Give the dummy timecounter a solid negative quality of minus a million.

Give the i8254 zero and the ACPI 1000.

The TSC gets 800, unless APM or SMP forces it negative.

Other timecounters default to zero quality and thereby retain current
selection behaviour.
2003-08-16 08:23:53 +00:00
Poul-Henning Kamp
8dcee923b5 remove acquire_timer0() and release_timer0() and related stuff. 2003-08-15 15:50:49 +00:00
John Baldwin
77f7a374d6 - Fix a typo in a comment.
- Use macros for MSR register indexes as well as the bitfields in the
  APICBASE MSR.
2003-08-15 15:25:19 +00:00
John Baldwin
6d84ef820f - Add macros describing some new MSR's in the Pentium 4 and some older
MSR's in the original Pentium.
- Add macros describing the bit fields in the APICBASE MSR.
2003-08-15 15:24:23 +00:00
John Baldwin
594dfbc391 - Fix a duplicated typo.
- Add a macro for the logical shift needed to extract an APIC ID from
  either from the local APIC ICR Hi register or the APIC ID registers of
  the local and IO APICs.
2003-08-15 15:23:13 +00:00
John Baldwin
426db9b60f - Remove redundant <sys/sysctl.h> include.
- Move the <machine/vm86.h> include up to the other <machine/*> includes.
2003-08-15 15:20:27 +00:00
John Baldwin
b37e8a903c Adjust the style of the #ifdef SMP in casuptr() so that the #ifdef SMP
just covers the lock prefix to match the existing style in other asm files
in i386.
2003-08-15 15:19:21 +00:00
John Baldwin
1b1a896518 - Update location of PCI headers.
- Use macros for PCI config registers instead of magic numbers.
- Small whitespace nits.
2003-08-15 15:18:29 +00:00
Poul-Henning Kamp
c43001fc56 As warned: Initiate deorbit burn for the pcaudio driver. 2003-08-15 14:56:05 +00:00