When spibus is attached as child of Intel SPI controller it scans all
ACPI nodes for "SPI Serial Bus Connection Resource Descriptor" described
in section 19.6.126 of ACPI specs.
If such a descriptor is found, SPI child is added to spibus, it's SPI
chip select, mode, clock, IRQ resource and ACPI handle are added to ivars.
Existing ACPI bus-hosted child is deleted afterwards.
Apple ACPI SPI extensions are supported.
Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D41248
Required for Apple and Microsoft -compatible HID-over-SPI drivers.
Most logic was already implemented in commit 3c08673438
"spibus: extend API: add cs_delay ivar, KEEP_CS and NO_SLEEP flags".
It dissallowed driver sleeps in the interrupt context. This commit
extends this feature to handle ddb/kdb context with following:
- Skip driver locking if SPI functions were called from kdb/ddb.
- Reinitialize controller if kdb/ddb initiated SPI transfer has
interrupted another already running one. Does not work very
reliable yet.
Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D41247
Some devices like Apple HID-over-SPI may contain more than one report
descriptors necessitating creation of multiple hidbus children.
Add indentificator of child devices to distinct them.
No functional changes intended.
Differential Revision: https://reviews.freebsd.org/D41246
IRQ Resource is allocated on spibus(4). We must release it here too
rather than propagate request down the tree.
Fixes: 4dd8db62e9 ("Add IRQ resource to SPIBUS")
MFC after: 1 week
Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D41243
By letting vm_phys_enqueue_contig handle the case when npages == 0,
the callers can stop checking it, and the compiler can stop
zero-checking with every call to ffs(). Letting vm_phys_enqueue_contig
call vm_phys_enqueue_contig for part of its work also saves a few
bytes.
The amd64 object code shrinks by 128 bytes.
Reviewed by: kib (previous version)
Tested by: pho
Differential Revision: https://reviews.freebsd.org/D41154
Free allocated per-CPU structures in the pcpu_fini and finalize methods.
While here, add debug trace entries to these methods.
Reviewed by: jkoshy, andrew
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D41269
Free allocated per-CPU structures in the pcpu_fini and finalize methods.
While here, add debug trace entries to these methods.
Reviewed by: jkoshy, andrew
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D41268
Add web links to intro(9) and the Architecture Handbook.
Reviewed by: lwhsu, emaste
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D41253
This page has existed as a placeholder since its creation in 1995. It
does not provide a useful introduction to the content in this section.
Reimagine it as a top-level overview page containing brief descriptions
and links to existing pages in section 9. It is roughly organized into
sub-sections, grouped by topic or subsystem. In other words, the page is
meant to function as a map to other content.
There is a balance to be found here between providing as many links as
possible and keeping the page concise and searchable. In general the aim
is to reference pages which provide the best entry point to a particular
topic. For example, a link is given to locking(9), but not to the
specific lock pages such as mutex(9) or rwlock(9).
NetBSD has done something similar with their intro(9), so some
inspiration has been taken from there, although their content doesn't
align that closely with what we have.
I have done a thorough review of our existing pages and formed these
subsections around them, but they are meant to evolve.
PR: 270481
Reviewed by: imp, emaste
MFC after: 3 weeks
Relnotes: yes
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D41104
This page documents 'struct bio', so this can be helpful with finding or
referencing it.
Reviewed by: imp, markj
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D41252
The driver belabors the point about unsupported SFPs, printing multiple
times on link up. Limit it to once.
Reviewed by: markj
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D39785
This feature masks TSO capability when a link comes up at 10 or 100mbit
due to errata on the chips. This behavior matches previous versions of
FreeBSD as well as NetBSD and Linux.
A tunable, hw.em.unsupported_tso may be set if the admin desires to
disabling automasking and configure TSO settings manually.
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D41170
patch to fix half-cycle trigonometric functions
Paul Zimmermann, a MPFR developer, contacted me about large errors in
the half-cycle trigonometric functions. I've have investigated these
issues and developed the attached patch. The float, double, and ld80
(long double) changes have been tested.
Caveat emptor: The ld128 changes have not been compiled. The ld128
changes have not been tested. I do not have access to a system that
uses ld128 floating point.
Here is an itemized list of changes:
* lib/msun/src/math_private.h:
. Add fast floor macros to compute the integer part of |x| for
0 <= |x| 01xp(N-1), where N is the precision of the type of x.
These macros are used in the half-cycle trigonometric functions
(e.g., sinpi(x)).
. The FFLOOR80 macros is used with the Intel 80-bit extended double
functions. This macors corrects an off-by-one error, which led to
enormous error for |x| > 0x1p32.
* lib/msun/src/s_cospif.c:
* lib/msun/src/s_cospi.c:
* lib/msun/ld80/s_cospil.c:
. Update Copyright years.
. Use FFLOOR*() macro to get integer part of |x|.
. Correct handle the range 0x1p(N-1) <= |x| < 0x1pN. Here, one needs
to determine if the integral value of |x| is even or odd to choose
+1 or -1. If |x| >= 0x1pN, always return +1.
* lib/msun/src/s_sinpif.c:
* lib/msun/src/s_sinpi.c:
* lib/msun/ld80/s_sinpil.c:
. Update Copyright years.
. Use FFLOOR*() macro to get integer part of |x|.
* lib/msun/src/s_tanpif.c:
* lib/msun/src/s_tanpi.c:
* lib/msun/ld80/s_tanpil.c:
. Update Copyright years.
. For +-0.5, return +-inf. Previously, tanpi[fl]() returned an NaN.
. Use FFLOOR*() to get integer part of |x|. Need to determine if the
integer part is even or odd. This is used to set +-0 for |x|
integral
and +-inf for (n+1/2).
. For 0x1p(N-1) <= |x| < 0x1pN need to determine if x is an even or
odd
integer to select +0 or -0. For |x| >= 0x1pN, it is always an even
integer, select 0.
. Note, tanpi[fl](x) is an odd function, so one needs to consider
tanpi[fl](-|x|) = - tanpi[fl](|x|).
* lib/msun/ld128/s_cospil.c:
* lib/msun/ld128/s_sinpil.c:
* lib/msun/ld128/s_tanpil.c:
. Update Copyright years.
. These routines use an FFLOOR128 macros, which likely should be
replaced by a bit twiddling algorithm.
. The same considerations above are applied to 0x1p112 <= |x| <
0x1p113,
and |x| >= 0x1p113 cases.
. Note, even and odd determination used fmodl(x,2.), which is likely
slow.
PR: 272742
MFC after: 1 week
David Das (das@) committed Bruce Evan's (bde's) WIP code for
expl() and logl() in git revision 25a4d6bfda. That code
included instrumentation that allowed bde to generate pari
scripts used in testing/debugging. This patch removes that
instrumentation as it is unlikely that others will ever use it.
* math/libm/msun/src/math_private.h:
. Remove bde's macros for the generation of pari scripts.
* math/libm/msun/ld128/s_expl.c:
* math/libm/msun/ld128/s_logl.c:
* math/libm/msun/ld80/s_expl.c:
* math/libm/msun/ld80/s_logl.c:
. Remove bde's DOPRINT_START macro.
. Change RETURNP to RETURNF.
. Change RETURN2P to RETURNF. Adjust arguments as needed.
. Change RETURNPI to RETURNI.
. Change RETURN2PI to RETURNI. Adjust arguments as needed.
PR: 272765
MFC after: 1 week
Quote re arg to grep in case it has spaces, and quote [:blank:] tr arg
to avoid the shell interpreting [].
PR: 272729
Reviewed by: Mina Galić <freebsd@igalic.co>
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D41282
Older versions of FreeBSD included the HPN patch set and provided
client-side VersionAddendum. Both of these changes have been retired
but we've retained the option parsing for backwards compatibility to
avoid breaking upgrades. Add comment references to the relevant
commits.
Sponsored by: The FreeBSD Foundation
There was a window between commits 4ae6991228 ("dtrace: Add
WITH_DTRACE_ASAN") and 848ff9bc1b ("libdtrace: Explicitly set SHLIBDIR
and SHLIB_MAJOR") where libdtrace.so.2 was being installed to /usr/lib
instead of /lib.
Early during boot, thread0 runs with td->td_ucred == NULL. This is
fixed up in proc0_init() at SI_SUB_INTRINSIC. If a panic occurs before
then, rather than dereference a NULL pointer, simply allow the thread to
enter KDB.
Reported by: stevek
Reviewed by: mhorne, stevek
MFC after: 1 week
Fixes: cab1056105 ("kdb: Modify securelevel policy")
Differential Revision: https://reviews.freebsd.org/D41280
Match other platforms, include the kernel config in the build.
Reviewed by: emaste
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D41284
By letting vm_phys_enqueue_contig handle the case when npages == 0,
the callers can stop checking it, and the compiler can stop
zero-checking with every call to ffs(). Letting vm_phys_enqueue_contig
call vm_phys_enqueue_contig for part of its work also saves a few
bytes.
The amd64 object code shrinks by 80 bytes.
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D41154
Toolchain components were historically statically linked. They became
normal dynamically linked executables in commit 6ab18ea64d. There is
no need to keep a special case build option for the toolchain; users who
want statically linked toolchain (or any other) components can use the
existing NO_SHARED knob.
Reviewed by: dim, sjg
Relnotes: Yes
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D41266
Use an sbuf that drains to printf to avoid duplicating code in the two
versions of each function.
Reviewed by: mav
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D41263
Andrew Turner