Commit Graph

203 Commits

Author SHA1 Message Date
Ed Maste
fc2a8776a2 Rename assym.s to assym.inc
assym is only to be included by other .s files, and should never
actually be assembled by itself.

Reviewed by:	imp, bdrewery (earlier)
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D14180
2018-03-20 17:58:51 +00:00
Bruce Evans
c93ea91c54 Minor cleanups found while fixing a bug involving double mapping of low
memory:

Load the kernel eflags less magically, as in locore.  The magic increased
when I removed eflags from the pcb in r305899.

Remove a jump to low memory that became garbage when the i386 version was
mostly replaced by the amd64 version in r235622.

The amd64 version is very similar.  It still loads the flags magically,
but is not missing comments about using the special page table.

Reviewed by:	kib
2017-12-15 03:05:14 +00:00
Pedro F. Giffuni
83ef78be95 sys/i386: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 15:08:52 +00:00
Konstantin Belousov
b57a73f8e7 If x86 CPU implementation of the MWAIT instruction reasonably
interacts with interrupts, query ACPI and use MWAIT for entrance into
Cx sleep states.  Support C1 "I/O then halt" mode.  See Intel'
document 302223-007 "Intelб╝ Processor Vendor-Specific ACPI Interface
Specification" for description.

Move the acpi_cpu_c1() function into x86/cpu_machdep.c and use
it instead of inlining "sti; hlt" sequence in several places.

In the acpi(4) man page, besides documenting the dev.cpu.N.cx_methods
sysctl, correct the names for dev.cpu.N.{cx_usage,cx_lowest,cx_supported}
sysctls.

Both jkim and avg have some other patches implementing the mwait
functionality; this work is unrelated.  Linux does not rely on the
ACPI to provide correct tables describing Cx modes.  Instead, the
driver has pre-defined knowledge of the CPU models, it was supplied by
Intel.

Tested by:    pho (previous versions)
Sponsored by:	The FreeBSD Foundation
2015-05-09 12:28:48 +00:00
John Baldwin
d9f3b5e7b4 Correct a comment brought over from amd64. i386 doesn't use long
mode.
2014-08-12 18:22:57 +00:00
Hans Petter Selasky
af3b2549c4 Pull in r267961 and r267973 again. Fix for issues reported will follow. 2014-06-28 03:56:17 +00:00
Glen Barber
37a107a407 Revert r267961, r267973:
These changes prevent sysctl(8) from returning proper output,
such as:

 1) no output from sysctl(8)
 2) erroneously returning ENOMEM with tools like truss(1)
    or uname(1)
 truss: can not get etype: Cannot allocate memory
2014-06-27 22:05:21 +00:00
Hans Petter Selasky
3da1cf1e88 Extend the meaning of the CTLFLAG_TUN flag to automatically check if
there is an environment variable which shall initialize the SYSCTL
during early boot. This works for all SYSCTL types both statically and
dynamically created ones, except for the SYSCTL NODE type and SYSCTLs
which belong to VNETs. A new flag, CTLFLAG_NOFETCH, has been added to
be used in the case a tunable sysctl has a custom initialisation
function allowing the sysctl to still be marked as a tunable. The
kernel SYSCTL API is mostly the same, with a few exceptions for some
special operations like iterating childrens of a static/extern SYSCTL
node. This operation should probably be made into a factored out
common macro, hence some device drivers use this. The reason for
changing the SYSCTL API was the need for a SYSCTL parent OID pointer
and not only the SYSCTL parent OID list pointer in order to quickly
generate the sysctl path. The motivation behind this patch is to avoid
parameter loading cludges inside the OFED driver subsystem. Instead of
adding special code to the OFED driver subsystem to post-load tunables
into dynamically created sysctls, we generalize this in the kernel.

Other changes:
- Corrected a possibly incorrect sysctl name from "hw.cbb.intr_mask"
to "hw.pcic.intr_mask".
- Removed redundant TUNABLE statements throughout the kernel.
- Some minor code rewrites in connection to removing not needed
TUNABLE statements.
- Added a missing SYSCTL_DECL().
- Wrapped two very long lines.
- Avoid malloc()/free() inside sysctl string handling, in case it is
called to initialize a sysctl from a tunable, hence malloc()/free() is
not ready when sysctls from the sysctl dataset are registered.
- Bumped FreeBSD version to indicate SYSCTL API change.

MFC after:	2 weeks
Sponsored by:	Mellanox Technologies
2014-06-27 16:33:43 +00:00
Jung-uk Kim
00a54dfb1c Consistently use round_page(x) rather than roundup(x, PAGE_SIZE). There is
no functional change.
2013-02-15 22:43:08 +00:00
Eitan Adler
a8de37b024 This isn't functionally identical. In some cases a hint to disable
unit 0 would in fact disable all units.

This reverts r241856

Approved by: cperciva (implicit)
2012-10-22 13:06:09 +00:00
Eitan Adler
76b7512247 Now that device disabling is generic, remove extraneous code from the
device drivers that used to provide this feature.

Reviewed by:	des
Approved by:	cperciva
MFC after:	1 week
2012-10-22 03:41:14 +00:00
Jung-uk Kim
acd7df97cc - Fix resumectx() prototypes to reflect reality.
- For i386, simply jump to resumectx() with PCB in %ecx.
- Fix a style(9) nit while I am here.
2012-06-13 21:03:01 +00:00
Mitsuru IWASAKI
fb864578af Add x86/acpica/acpi_wakeup.c for amd64 and i386. Difference of
suspend/resume procedures are minimized among them.

common:
- Add global cpuset suspended_cpus to indicate APs are suspended/resumed.
- Remove acpi_waketag and acpi_wakemap from acpivar.h (no longer used).
- Add some variables in acpi_wakecode.S in order to minimize the difference
  among amd64 and i386.
- Disable load_cr3() because now CR3 is restored in resumectx().

amd64:
- Add suspend/resume related members (such as MSR) in PCB.
- Modify savectx() for above new PCB members.
- Merge acpi_switch.S into cpu_switch.S as resumectx().

i386:
- Merge(and remove) suspendctx() into savectx() in order to match with
  amd64 code.

Reviewed by:	attilio@, acpi@
2012-06-09 00:37:26 +00:00
Jung-uk Kim
9ad569771a Consistently use ACPI_SUCCESS() and ACPI_FAILURE() macros wherever possible. 2012-06-01 21:33:33 +00:00
Jung-uk Kim
db08ae007d Tidy up code clutter in SMP case a bit. No functional change. 2012-06-01 19:19:04 +00:00
Jung-uk Kim
108705d043 Call AcpiSetFirmwareWakingVector() with interrupt disabled for consistency. 2012-06-01 18:18:48 +00:00
Jung-uk Kim
d3638dc4de Improve style(9) in the previous commit. 2012-06-01 17:07:52 +00:00
Mitsuru IWASAKI
f0a101b7e2 Call AcpiLeaveSleepStatePrep() in interrupt disabled context
(described in ACPICA source code).

- Move intr_disable() and intr_restore() from acpi_wakeup.c to acpi.c
  and call AcpiLeaveSleepStatePrep() in interrupt disabled context.
- Add acpi_wakeup_machdep() to execute wakeup MD procedures and call
  it twice in interrupt disabled/enabled context (ia64 version is
  just dummy).
- Rename wakeup_cpus variable in acpi_sleep_machdep() to suspcpus in
  order to be shared by acpi_sleep_machdep() and acpi_wakeup_machdep().
- Move identity mapping related code to acpi_install_wakeup_handler()
  (i386 version) for preparation of x86/acpica/acpi_wakeup.c
  (MFC candidate).

Reviewed by:	jkim@
MFC after:	2 days
2012-06-01 15:26:32 +00:00
Mitsuru IWASAKI
29d8e665ba Revert the previous commit on wakecode address verbose printing.
This broke PAE kernel building.
2012-05-19 02:31:38 +00:00
Mitsuru IWASAKI
e3fd0bc1b2 Add SMP/i386 suspend/resume support.
Most part is merged from amd64.

- i386/acpica/acpi_wakecode.S
Replaced with amd64 code (from realmode to paging enabling code).

- i386/acpica/acpi_wakeup.c
Replaced with amd64 code (except for wakeup_pagetables stuff).

- i386/include/pcb.h
- i386/i386/genassym.c
Added PCB new members (CR0, CR2, CR4, DS, ED, FS, SS, GDT, IDT, LDT
and TR) needed for suspend/resume, not for context switch.

- i386/i386/swtch.s
Added suspendctx() and resumectx().
Note that savectx() was not changed and used for suspending (while
amd64 code uses it).
BSP and AP execute the same sequence, suspendctx(), acpi_wakecode()
and resumectx() for suspend/resume (in case of UP system also).

- i386/i386/apic_vector.s
Added cpususpend().

- i386/i386/mp_machdep.c
- i386/include/smp.h
Added cpususpend_handler().

- i386/include/apicvar.h
- kern/subr_smp.c
- sys/smp.h
Added IPI_SUSPEND and suspend_cpus().

- i386/i386/initcpu.c
- i386/i386/machdep.c
- i386/include/md_var.h
- pc98/pc98/machdep.c
Moved initializecpu() declarations to md_var.h.

MFC after:	3 days
2012-05-18 18:55:58 +00:00
John Baldwin
424e69759c Centralize declaration of the debug.acpi sysctl node. 2012-05-17 17:58:53 +00:00
Jung-uk Kim
4c52cad2f9 Merge ACPICA 20120320. 2012-03-20 21:37:52 +00:00
John Baldwin
5e9fcac6f4 MFamd64:
- Return failure for a suspend attempt if we have no wake address.
- Use intr_disable()/intr_restore() instead of ACPI_DISABLE_IRQS().
- Invoke intr_suspend() earlier and call intr_resume() if suspend
  fails.
- Use pause in the loop waiting for CPU to suspend.
- Restore PAT MSR, switchtime, switchticks, and MTRRs on resume.

Reviewed by:	jkim (earlier version)
MFC after:	2 weeks
2012-03-09 19:20:19 +00:00
Jung-uk Kim
a3c464fb3c MFamd64: (based on) r209957
Move logic of building ACPI headers for acpi_wakeup.c into better places,
remove intermediate makefile and shell script, and reduce diff between i386
and amd64.
2010-11-12 20:55:14 +00:00
Jung-uk Kim
93a8847473 Make APM emulation look more closer to its origin. Use device_get_softc(9)
instead of hardcoding acpi(4) unit number as we have device_t for it.
2010-11-10 18:50:12 +00:00
Jung-uk Kim
7c2bf852d7 Refactor acpi_machdep.c for amd64 and i386, move APM emulation into a new
file acpi_apm.c, and place it on sys/x86/acpica.
2010-11-10 01:29:56 +00:00
Jung-uk Kim
cedd86cafa Now OsdEnvironment.c is identical on amd64 and i386. Move it to a new home. 2010-11-09 00:27:18 +00:00
Jung-uk Kim
2473325fa8 Reduce diff between platforms and fix style(9) bugs. 2010-11-09 00:14:39 +00:00
John Baldwin
13e25cb7a5 Move the MADT parser for amd64 and i386 to sys/x86/acpica now that it is
identical on both platforms.
2010-11-08 20:57:02 +00:00
John Baldwin
c5b0b5fc6b Sync the APIC startup sequence with amd64:
- Register APIC enumerators at SI_SUB_TUNABLES - 1 instead of SI_SUB_CPU - 1.
- Probe CPUs at SI_SUB_TUNABLES - 1.  This allows i386 to set a truly
  accurate mp_maxid value rather than always setting it to MAXCPU - 1.
2010-11-08 20:35:09 +00:00
John Baldwin
f67b4bd367 A few small style and whitespace fixes. 2010-11-08 20:05:22 +00:00
John Baldwin
32c3d3b6e6 Move <machine/apicreg.h> to <x86/apicreg.h>. 2010-11-01 18:18:46 +00:00
John Baldwin
5ecdb3c46b Move the <machine/mca.h> header to <x86/mca.h>. 2010-11-01 17:40:35 +00:00
Rui Paulo
187278cadc For every instance of '.if ${CC} == "foo"' or '.if ${CC} != "foo"' in
Makefiles or *.mk files, use ${CC:T:Mfoo} instead, so only the basename
of the compiler command (excluding any arguments) is considered.

This allows you to use, for example, CC="/nondefault/path/clang -xxx",
and still have the various tests in bsd.*.mk identify your compiler as
clang correctly.

ICC if cases were also changed.

Submitted by:	Dimitry Andric <dimitry at andric.com>
2010-08-17 20:39:28 +00:00
John Baldwin
61d3f0bab2 Restore the machine check register banks on resume. For banks being
monitored via CMCI, reset the interrupt threshold to 1 on resume.

Reviewed by:	jkim
MFC after:	2 weeks
2010-06-15 18:51:41 +00:00
John Baldwin
3aa6d94e0c Update several places that iterate over CPUs to use CPU_FOREACH(). 2010-06-11 18:46:34 +00:00
John Baldwin
42c93b8d31 Use the same policy for rejecting / not-reject ACPI tables with incorrect
checksums as the base acpi(4) driver.  This fixes a problem where the MADT
parser would reject the MADT table during early boot causing the MP Table
to be, but then the acpi(4) driver would attach and use non-SMP interrupt
routing.

Tested by:	Alastair Hogge  agh of coolrhaug com
MFC after:	1 week
2010-03-19 12:43:18 +00:00
John Baldwin
d95e7f5a7a Extract the code to find and map the MADT ACPI table during early kernel
startup and genericize it so it can be reused to map other tables as well:
- Add a routine to walk a list of ACPI subtables such as those used in the
  APIC and SRAT tables in the MI acpi(4) driver.
- Move the routines for mapping and unmapping an ACPI table as well as
  mapping the RSDT or XSDT and searching for a table with a given signature
  out into acpica_machdep.c for both amd64 and i386.
2009-09-23 15:42:35 +00:00
Robert Watson
e76d823b81 Use C99 initialization for struct filterops.
Obtained from:	Mac OS X
Sponsored by:	Apple Inc.
MFC after:	3 weeks
2009-09-12 20:03:45 +00:00
John Baldwin
a56fe095f0 Temporarily revert the new-bus locking for 8.0 release. It will be
reintroduced after HEAD is reopened for commits by re@.

Approved by:	re (kib), attilio
2009-08-20 19:17:53 +00:00
Attilio Rao
444b91868b Make the newbus subsystem Giant free by adding the new newbus sxlock.
The newbus lock is responsible for protecting newbus internIal structures,
device states and devclass flags. It is necessary to hold it when all
such datas are accessed. For the other operations, softc locking should
ensure enough protection to avoid races.

Newbus lock is automatically held when virtual operations on the device
and bus are invoked when loading the driver or when the suspend/resume
take place. For other 'spourious' operations trying to access/modify
the newbus topology, newbus lock needs to be automatically acquired and
dropped.

For the moment Giant is also acquired in some key point (modules subsystem)
in order to avoid problems before the 8.0 release as module handlers could
make assumptions about it. This Giant locking should go just after
the release happens.

Please keep in mind that the public interface can be expanded in order
to provide more support, if there are really necessities at some point
and also some bugs could arise as long as the patch needs a bit of
further testing.

Bump __FreeBSD_version in order to reflect the newbus lock introduction.

Reviewed by:    ed, hps, jhb, imp, mav, scottl
No answer by:   ariff, thompsa, yongari
Tested by:      pho,
                G. Trematerra <giovanni dot trematerra at gmail dot com>,
                Brandon Gooch <jamesbrandongooch at gmail dot com>
Sponsored by:   Yahoo! Incorporated
Approved by:	re (ksmith)
2009-08-02 14:28:40 +00:00
Konstantin Belousov
d8b0556c6d Adapt vfs kqfilter to the shared vnode lock used by zfs write vop. Use
vnode interlock to protect the knote fields [1]. The locking assumes
that shared vnode lock is held, thus we get exclusive access to knote
either by exclusive vnode lock protection, or by shared vnode lock +
vnode interlock.

Do not use kl_locked() method to assert either lock ownership or the
fact that curthread does not own the lock. For shared locks, ownership
is not recorded, e.g. VOP_ISLOCKED can return LK_SHARED for the shared
lock not owned by curthread, causing false positives in kqueue subsystem
assertions about knlist lock.

Remove kl_locked method from knlist lock vector, and add two separate
assertion methods kl_assert_locked and kl_assert_unlocked, that are
supposed to use proper asserts. Change knlist_init accordingly.

Add convenience function knlist_init_mtx to reduce number of arguments
for typical knlist initialization.

Submitted by:	jhb [1]
Noted by:	jhb [2]
Reviewed by:	jhb
Tested by:	rnoland
2009-06-10 20:59:32 +00:00
Jung-uk Kim
129d3046ef Import ACPICA 20090521. 2009-06-05 18:44:36 +00:00
Warner Losh
1de9b53249 We don't need d_thread_t for cross-branch portability here anymore.
Move do struct thread * instead.
2009-05-20 16:47:40 +00:00
John Baldwin
b25fc07f53 At least one BIOS bogusly includes duplicate entries for I/O APICs. The
bogus entries have a starting IRQ that is invalid (> 255, so won't fit
into a PCI intline config register).  It had the side effect of breaking
MSI by "claiming" several IRQs in the MSI range.  Fix this by ignoring such
I/O APICs.

MFC after:	2 weeks
2009-03-05 16:03:44 +00:00
Roman Divacky
1faa4dcb71 Mark these variables as __used too. Fix a style of previous commit.
Noticed by:	Christoph Mallon
Approved by:	kib (mentor)
2009-02-18 22:44:55 +00:00
Roman Divacky
004aa5e7ad Mark these variables as __used as those are used in the asm block.
Approved by:	kib (mentor)
2009-02-18 18:25:16 +00:00
Ed Schouten
d3ce832719 Remove unit2minor() use from kernel code.
When I changed kern_conf.c three months ago I made device unit numbers
equal to (unneeded) device minor numbers. We used to require
bitshifting, because there were eight bits in the middle that were
reserved for a device major number. Not very long after I turned
dev2unit(), minor(), unit2minor() and minor2unit() into macro's.
The unit2minor() and minor2unit() macro's were no-ops.

We'd better not remove these four macro's from the kernel, because there
is a lot of (external) code that may still depend on them. For now it's
harmless to remove all invocations of unit2minor() and minor2unit().

Reviewed by:	kib
2008-09-26 14:19:52 +00:00
Ed Schouten
29d4cb241b Don't enforce unique device minor number policy anymore.
Except for the case where we use the cloner library (clone_create() and
friends), there is no reason to enforce a unique device minor number
policy. There are various drivers in the source tree that allocate unr
pools and such to provide minor numbers, without using them themselves.

Because we still need to support unique device minor numbers for the
cloner library, introduce a new flag called D_NEEDMINOR. All cdevsw's
that are used in combination with the cloner library should be marked
with this flag to make the cloning work.

This means drivers can now freely use si_drv0 to store their own flags
and state, making it effectively the same as si_drv1 and si_drv2. We
still keep the minor() and dev2unit() routines around to make drivers
happy.

The NTFS code also used the minor number in its hash table. We should
not do this anymore. If the si_drv0 field would be changed, it would no
longer end up in the same list.

Approved by:	philip (mentor)
2008-06-11 18:55:19 +00:00
Robert Watson
237fdd787b In keeping with style(9)'s recommendations on macros, use a ';'
after each SYSINIT() macro invocation.  This makes a number of
lightweight C parsers much happier with the FreeBSD kernel
source, including cflow's prcc and lxr.

MFC after:	1 month
Discussed with:	imp, rink
2008-03-16 10:58:09 +00:00