Create a new header lwp_private.h to contain _lwp_getprivate_fast,
_lwp_gettcb_fast, _lwp_settcb and remove them from mcontext.h, so that:
1. we don't need special hacks to hide them
2. we can include <lwp.h> where needed to get the necessary prototypes
without redefining them locally.

Undo previous lwp.h change.

Split __lwp_getprivate_fast and __lwp_*tcb from mcontext.h into a separate
lwp.h file.

branches: 1.30.36;
Retire compat_ibcs2, as discussed on tech-kern@. FreeBSD did the same
recently.

Remove the kernel PMC code. Sent yesterday on tech-kern@.

This change:

* Removes "options PERFCTRS", the associated includes, and the associated
ifdefs. In doing so, it removes several XXXSMPs in the MI code, which is
good.

* Removes the PMC code of ARM XSCALE.

* Removes all the pmc.h files. They were all empty, except for ARM XSCALE.

* Reorders the x86 PMC code not to rely on the legacy pmc.h file. The
definitions are put in sysarch.h.

* Removes the kern/sys_pmc.c file, and along with it, the sys_pmc_control
and sys_pmc_get_info syscalls. They are marked as OBSOL in kern,
netbsd32 and rump.

* Removes the pmc_evid_t and pmc_ctr_t types.

* Removes all the associated man pages. The sets are marked as obsolete.

branches: 1.28.52; 1.28.54;
Retire varargs.h support. Move machine/stdarg.h logic into MI
sys/stdarg.h and expect compiler to provide proper builtins, defaulting
to the GCC interface. lint still has a special fallback.
Reduce abuse of _BSD_VA_LIST_ by defining __va_list by default and
derive va_list as required by standards.

More MD changes to get vax compiling.

Partially adapt the VAX port to the newlock2 changes. These are untested
but they do at least compile.

don't install <machine/db_machdep.h>, this is kernel only

branches: 1.24.4; 1.24.8;
merge ktrace-lwp.

branches: 1.23.12;
Factor out W{CHAR,INT}_{MAX,MIN} into their own header file.

Enter vaxfp.h, the VAX pendant of <machine/ieee.h>.

branches: 1.21.2;
Merge the nathanw_sa branch.

Remove KDIR=, since SYS_INCLUDE=symlinks and KDIR are not supported any more.

Implement pmc(9) -- An interface to hardware performance monitoring
counters. These counters do not exist on all CPUs, but where they
do exist, can be used for counting events such as dcache misses that
would otherwise be difficult or impossible to instrument by code
inspection or hardware simulation.

pmc(9) is meant to be a general interface. Initially, the Intel XScale
counters are the only ones supported.

branches: 1.18.2; 1.18.8; 1.18.16;
Don't install machine/loadfile_machdep.h; per PR#12666.

Add definitions of C99 integer format conversion macros.
XXX Fastest minimum-width integer types haven't been decided upon yet.

Add definitions of C99 specified-width integer type limits.
XXX Fastest minimum-width integer types haven't been decided upon yet.

Add definitions of C99 minimum-width and greatest-width integer types.
XXX Fastest minimum-width integer types haven't been decided upon yet.

branches: 1.14.2;
Support to control the leds on VAXstations, taken from Sun3 and ported
to vax by Shinmyoh Koji (yesu@rb3.so-net.ne.jp).

Add <machine/int_types.h>, which provides namespace-pure definitions
of exact-width integer types.

export bus.h

Add coff_machdep.h (now need due to the recent exec_coff changes).

branches: 1.10.2;
Add loadfile() support. soon to be needed by bootblocks.

Oops, install <machine/lock.h> on these systems, too.

Add lcgreg.h.

Install "machineendian_machdep.h".

Add ibcs2_machdep.h and reformat so that adding new includes is a bit easier.

C99: Define a NAN macro in <math.h> which evaulates to a constant expression of
a single-precision quiet NaN; only to be defined on platforms that do support
this value.

branches: 1.4.2;
export elf_machdep.h

Add byte_swap.h here too.

Move the bswap functions from libutil to libc (this bups the
minor of libc and the major of libutil). For little-endian architectures
merge the bnswap() assembly versions with nto* and hton* using symbols
aliasing. Use symbol renaming for the bswap function in this case to avoid
namespace pollution.
Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian
machines, common code for inline macros go in machine/byte_swap.h
Sync libkern with libc.
Adjust #include in kernel sources for machine/bswap.h.

Rework the way kernel include files are installed. In the new method,
as with user-land programs, include files are installed by each directory
in the tree that has includes to install. (This allows more flexibility
as to what gets installed, makes 'partial installs' easier, and gives us
more options as to which machines' includes get installed at any given
time.) The old SYS_INCLUDES={symlinks,copies} behaviours are _both_
still supported, though at least one bug in the 'symlinks' case is
fixed by this change. Include files can't be build before installation,
so directories that have includes as targets (e.g. dev/pci) have to move
those targets into a different Makefile.

Switch all users (except ia64) of custom machine/ansi.h to common_ansi.h

Deduplicate the code among ports and poll definitions of types
directly from a compiler.

This fixes miscompilation of certain programs that instruct compilers
to generate code for different types. This bug has been detected with
-fshort-wchar in EFI firmware.

Proposed and discussed on a mailing list (twice).

Itanium uses custom !ELF fallback switch, temporarily leave it as it is.

branches: 1.26.54;
Retire varargs.h support. Move machine/stdarg.h logic into MI
sys/stdarg.h and expect compiler to provide proper builtins, defaulting
to the GCC interface. lint still has a special fallback.
Reduce abuse of _BSD_VA_LIST_ by defining __va_list by default and
derive va_list as required by standards.

1. {wctype,wctrans,mbstate}_t: switch MD to MI like other
libc implementation (such as *BSD and glibc2).

2. don't typedef void * wc{type,trans}_t, suggested by soda@-san.
it may pass through compiler type check, it's harmful.
so i introduce dummy struct __tag_wc{type,trans}_t(iconv_t already does).

no ABI change was made.

branches: 1.24.4; 1.24.6;
merge christos-time_t

branches: 1.23.2;
Drop support for compiling a.out kernel. Elves rule!

branches: 1.22.16; 1.22.18; 1.22.22; 1.22.24; 1.22.28;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

clean up some definitions around rune_t which are not needed anymore

branches: 1.20.8; 1.20.16; 1.20.22; 1.20.26; 1.20.28;
fix gcc -Werror -Wmissing-braces problem
mbstate_t(this is opaque object)'s initializer should be ``{ 0 }'',
so changed 1st field of union from character array to integer.

branches: 1.19.20; 1.19.22;
merge ktrace-lwp.

branches: 1.18.16;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.17.2;
add some ISO C 1995 I18N functions and types:
btowc, wctrans, towctrans, wcscoll, wcsxfrm, wctype_t and wctrans_t.

branches: 1.16.4;
Only define _BSD_WCHAR_T_ once.

branches: 1.15.2;
Change clock_t and time_t to more LP64 friendly types.

Under ELF, change clock_t and time_t to int's (more LP64 friendly).

branches: 1.13.4;
Add the types needed by the new locale code.

switch size_t, ptrdiff_t, & ssize_t to long int (signed or unsigned) for
__ELF__.

More GCC 2.96 changes.

fix typo

Use __builtin_va_list when GCC >= 2.96

G/c _BSD_INTPTR_T_ and _BSD_UINTPTR_T_.

branches: 1.7.14; 1.7.22;
Provide definitions for intptr_t and uintptr_t, signed resp. unsigned integral
types large enough to hold any pointer.

Add _BSD_SUSECONDS_T_ and _BSD_USECONDS_T_; do some space vs. tab formatting
cleanup

Define _BSD_CLOCKID_T_ and _BSD_TIMER_T_

Add _BSD_WINT_T_ definition so we can handle wint_t type added in NA1.

new RCS ID format.

Changes to make files more 4.4/1.0B working.

branches: 1.1.2;
Initial VAX port merging.

Rename __LDPGSZ to AOUT_LDPGSZ, to accurately reflect what it is.

branches: 1.5.30;
VAX logical page size increased to 4k.

relocation_info added.

new RCS ID format.

Minor updates of some errouneous parameters.

Initial VAX port merging.

PR 58960: fix misunderstanding in semantic and provide both the original
id string as well as _NETBSD_REVISIONID.
Do not rely on string concatenation in the inline assembler, use .ascii
and .asciz for individual string parts instead.

PR 58960: vax/asm.h: Respect NETBSD_REVISIONID.

branches: 1.28.26;
Mark the .ident section as mergable string section to avoid redundant
entries.

branches: 1.27.2; 1.27.12;
Add __KERNEL_RCSID() macro.

branches: 1.26.38;
Really fix polyf/polyd macros. Now returns expected results.

Remove an unneeded indirect access from polyd/polyf macros

branches: 1.24.2; 1.24.6; 1.24.8;
Add macros for polyd and polyf

Align functions on 4 byte boundaries, not 16.
Add END(x) for function sizing.

branches: 1.22.2; 1.22.4;
Consistently use .gnu.warning with .pushsectio and .popsection on all
architectures instead of obsolete STABS frames for linker warnings.

branches: 1.21.16;
remove a strain # endif from the previous commit.

Drop support for compiling a.out kernel. Elves rule!

branches: 1.19.4; 1.19.6; 1.19.10;
Put RCSIDs in section ".ident"

branches: 1.18.72;
Add a STRONG_ALIAS macro

branches: 1.17.2;
merge ktrace-lwp.

branches: 1.16.16;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.15.6;
Use the register prefix in the ELF case in _PROF_PROLOGUE.

branches: 1.14.4; 1.14.8; 1.14.18;
Revert WEAK_ALIAS back to ELF only.
Change ALTENTRY so there is no change of alignment or section

Rework ALTENTRY a bit.

a.out allow weak symbols too.

Add ELF support.

Add a WEAK_ALIAS() macro.

branches: 1.9.8; 1.9.18;
Move the bswap functions from libutil to libc (this bups the
minor of libc and the major of libutil). For little-endian architectures
merge the bnswap() assembly versions with nto* and hton* using symbols
aliasing. Use symbol renaming for the bswap function in this case to avoid
namespace pollution.
Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian
machines, common code for inline macros go in machine/byte_swap.h
Sync libkern with libc.
Adjust #include in kernel sources for machine/bswap.h.

Argh, fix the ANSI CPP version of the a.out WARN_REFERENCES().

Implement WARN_REFERENCES().

Add .type pseudo-ops needed for shared libraries.

PROF -> GPROF

Changed to work correctly with both K&R and ANSI cpp.

mtpr support for 11/780 added. DELAY added. mcount() corrected.
trapframe fixed to support all registers.

new RCS ID format.

branches: 1.1.2;
Initial VAX port merging.

Remove autoconf.h include from am7930.c as per Matt Thomas so
vax/include/autoconf.h isn't necessary.

Added as a placeholder so kernels compile until a better fix is found.

Change sys/arch/xxx/include/bswap.h to #include machine/byte_swap.h then
sys/bswap.h in order to pick up the MD inline routines and the constant
folding definitions in the right order.
Code can include either sys/bswap.h or machine/bswap.h with the same effect.

branches: 1.3.42; 1.3.54;
Use machine instead of vax in include path.

branches: 1.2.2; 1.2.10;
Include <sys/bswap.h> for function prototypes. i386, pc532 and vax
still include <machine/byte_swap.h> and define macros for some of
the bswap*() functions.

Move the bswap functions from libutil to libc (this bups the
minor of libc and the major of libutil). For little-endian architectures
merge the bnswap() assembly versions with nto* and hton* using symbols
aliasing. Use symbol renaming for the bswap function in this case to avoid
namespace pollution.
Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian
machines, common code for inline macros go in machine/byte_swap.h
Sync libkern with libc.
Adjust #include in kernel sources for machine/bswap.h.

Remove cargo-culted '#if 0' code that was designed to produce a
compile-time error if any of the bus_space_*_8 functions was used,
but was documented that it produces a link-time error.

branches: 1.35.8;
Avoid duplicate PRIxBUSADDR and follow the likely intention, providing PRIxBSH.

Provide PRIxBUSADDR, PRIxBUSSIZE, PRIuBUSSIZE, and PRIxBSH for all arches
to follow arm and (generic) mips.

Reviewed by christos.

branches: 1.33.18;
Elide unused variable warnings (Felix Deichmann)

Hooks needed for QVSS support

branches: 1.31.44; 1.31.64;
Remove clause 3 and 4 from TNF licenses

branches: 1.30.2; 1.30.4;
Rototill the vax code. Switch to devicet/PRIV_ALLOC. Cleanup vax autoconf
code. Move to prototype definitions. staticfy, constify, avoid casting.
Use device_* accessors.

branches: 1.29.2; 1.29.6;
change all u_int{8,16,32}_t to uint{8,16,32}_t

branches: 1.28.20; 1.28.26;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

add a pair of new bus_dma(9) functions:
int _bus_dmatag_subregion(bus_dma_tag_t tag,
bus_addr_t min_addr,
bus_addr_t max_addr,
bus_dma_tag_t *newtag,
int flags)
void _bus_dmatag_destroy(bus_dma_tag_t tag)

that allow a (normally broken/limited) device to restrict the bus address
range it can talk to. this is used by bce(4) to limit DMA addresses to
1GB range, the maximum the chip can address.

all this is from Yorick Hardy <yhardy@uj.ac.za> with input from several
people on tech-kern.

XXX: bus_dma(9) needs an update still.

branches: 1.26.20;
Change "inline" back to "__inline" in .h files -- C99 is still too
new, and some apps compile things in C89 mode. C89 keywords stay.

As per core@.

branches: 1.25.2; 1.25.4; 1.25.6;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

branches: 1.23.4;
Add a dm_maxsegsz public member to bus_dmamap_t. This allows a user of the API
to select the maximum segment size for each bus_dmamap_load (up to the maxsegsz
supplied to bus_dmamap_create). dm_maxsegsz is reset to the value supplied to
bus_dmamap_create when the dmamap is unloaded.

branches: 1.22.2; 1.22.10; 1.22.12;
Handle 64bit DMA addresses on PCI for platforms that can (currently only
enabled on amd64). Add a dmat64 field to various PCI attach structures,
and pass it down where needed. Implement a simple new function called
pci_dma64_available(pa) to test if 64bit DMA addresses may be used.
This returns 1 iff _PCI_HAVE_DMA64 is defined in <machine/pci_machdep.h>,
and there is more than 4G of memory.

Introduce BUS_DMA_NOCACHE, and bus_dmamem_map() of i386 supports it.

Add multiple inclusion protection.

Fix vax_mem_read_region_{2,4} bug, by der Mouse (mouse@Rodents.Montreal.QC.CA).

branches: 1.18.4;
Add bus_space_mmap().

branches: 1.17.2;
Add BUS_DMA_READ and BUS_DMA_WRITE flags, that hint the back-end
at dmamap load time that the mapping will be used for a unidirectional
transfer of the specified direction.

branches: 1.16.2;
constraint, not contraint.

Add the BUS_DMA_STREAMING flag.

branches: 1.14.2;
Change the kernel mmap interface so that the offset to map is an
"off_t" and the return value is a "paddr_t" to allow mappings
at offsets past 2^31 bytes. Somewhat inspired by FreeBSD, which
only changed the offset to a "vm_offset_t".

Includes updates for the i386, pc532 and sh3 mmmmap from Jason Thorpe.

branches: 1.13.2;
Forward declaration of `struct proc'.

branches: 1.12.2;
Add fix for VS4000 SCSI hangs on disk writes. Add a VAX_BUS_DMA_SPILLPAGE
and use it in the asc_vsbus driver.

explicitely #include <sys/systm.h> #if BUS_SPACE_DEBUG to get a printf()
prototype

fix bug in bus_space_subregion

define a "BUS_SPACE_MAP_PREFETCHABLE" flag which basically means that
device accesses are idempotent (but should not be cached by the CPU)

branches: 1.8.2;
nuke current definitions provided by __BUS_SPACE_COMPAT_OLDDEFS.
I'll do what I can to make new ones soon. 8-)

Add an define for SGMAP.

bus.h'ify more of the vax code.

First towards use of bus.h routines on vax. Allocate DMA memory for
LANCE chip on vaxstations.

branches: 1.4.4;
Add a macro to check for sufficient pointer alignment in bus.h context,
"BUS_SPACE_ALIGNED_POINTER()".
Equal to the param.h "ALIGNED_POINTER()" normally, but obeys additional
requirements of the bus_space_xxx_n() macros. (BUS_SPACE_DEBUG)

Fix some old mistakes when I originally committed this.

don't define __BUS_SPACE_COMPAT_OLDDEFS by default. As stated in
bus_space(9), if drivers want it (they shouldn't; easy to convert) they
can define it right before including bus.h. There's been a release since
the interfaces were (slightly) changed, and no code in the source tree
uses the old interfaces as far as I can tell.

Initial steps to getting the VAX to use the MI driver framework.

Eliminate recursive dependency on <sys/bswap.h> in MD <byte_swap.h>

On certain NetBSD archs, it isn't possible to include <sys/bswap.h>
directly without including <sys/endian.h> first. This has been
broken since at least before netbsd-10, but recent changes elsewhere
have made this problem more visible for some reason.

Fix this by not including <sys/types.h>, eliminating recursive
inclusion - <sys/types.h> includes <machine/endian.h>. It would
be nice to remove that line from types.h, since it's no longer
necessary, but currently the kernel assumes that <sys/endian.h> is
included from <sys/types.h> in various places (and possibly userspace
software does too).

For now we can take the less dangerous option by avoiding
including <sys/types.h> from these bswap headers. They don't need the
full header, and applications that assume transclusion aren't portable
anyway, since architectures like sparc64 don't include <sys/types.h>
via <sys/bswap.h>.

PR pkg/59839 palemoon, firefox, etc., don't build on arm64 any more

branches: 1.12.54;
cast return value

branches: 1.11.116; 1.11.136; 1.11.140;
Remove duplicate #include <sys/types.h>

branches: 1.10.2; 1.10.4;
Move all the stuff that detects bswapxx(constant) into the MI sys/bswap.h
Put the minimum to define the required inline assembler or C into the MD files.
NB: there may be some fallout from this!

branches: 1.9.2;
inline -> __inline

Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

branches: 1.6.16;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.5.16;
Move .s files to .S files. (and .s.o rules in boot/Makefile.inc)
Put in register prefixes everywhere.

#include <sys/types.h> in case this is included before that was.

Use inline functions for the byte swap routines. Allows libc to build
again (-Wshadow).

branches: 1.2.4; 1.2.8;
GCC 2.96 wants the = constraint first. Older gcc(s) don't care.

branches: 1.1.8;
Move the bswap functions from libutil to libc (this bups the
minor of libc and the major of libutil). For little-endian architectures
merge the bnswap() assembly versions with nto* and hton* using symbols
aliasing. Use symbol renaming for the bswap function in this case to avoid
namespace pollution.
Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian
machines, common code for inline macros go in machine/byte_swap.h
Sync libkern with libc.
Adjust #include in kernel sources for machine/bswap.h.

Update copyright notice for Ludd (remove clause 3 & 4).

branches: 1.2.48; 1.2.68;
Rototill the vax code. Switch to devicet/PRIV_ALLOC. Cleanup vax autoconf
code. Move to prototype definitions. staticfy, constify, avoid casting.
Use device_* accessors.

branches: 1.1.2; 1.1.42; 1.1.104; 1.1.124; 1.1.128;
Console Communication Area (CCA) layout description.
Used on for example VAX 6000 machines.

Change CMSG_SPACE and CMSG_LEN to provide Integer Constant Expressions
again. This was changed in sys/socket.h r1.51 to work around fallout
from the IPv6 aux data migration. It broke the historic ABI on some
platforms. This commit restores compatibility for netbsd32 code on such
platforms and provides a template for future changes to the CMSG_*
alignment. Revert PCC/Clang workarounds in postfix and tmux.

branches: 1.6.182; 1.6.186;
Garbage-collect.

Must #define __warn_references if not GNUC.

Bug fixes and cleanup from Chris Demetriou <cgd@pa.dec.com>:
- fix _C_LABEL so that it actually works.
- make __RENAME use _C_LABEL.
- fix __RENAME so that it expects an unquoted argument.
- fix __indr_reference and __warn_references so that they
supply their own final semicolon.
- define __warn_references to nothing if not GNU C (required
by the way it's used).

The __warn_references semicolon change has to be made
so that __warn_references can be defined into nothing.
(A ; all by itself isn't a great idea.) The __indr_reference
change was made for consistency.

Implement __RENAME() in <machine/cdefs.h>

branches: 1.2.18;
Changed name of __weak_reference() to __indr_reference(). They really
are indirect references, and I want to add a real __weak_reference()
macro to <machine/cdefs.h> soon.

This file, which will be included by <sys/cdefs.h>, will contain macros
such as __warn_references() and __weak_reference() which are actually
machine dependant. This will make it easier for ports that are being
bootstraped with ELF and ECOFF based toolchains.

This change also introduces a new macro, _C_LABEL(x). _C_LABEL expands
its argument, an identifier, to a character string of the identifier
name as it is represented in an object file.

For most ports, _C_LABEL(x) will expand to "_x", for ELF based ports
_C_LABEL(x) will expand to "x".

Update copyright notice for Ludd (remove clause 3 & 4).

branches: 1.9.2;
PR/49207: Kamil Rytarowski: Add sys/clock.h with generic time macros
(derived from clock_subr.h). Keep clock_subr.h with the kernel structures
and functions to reduce diffs, and have clock.h only include standalone
constants and macros.

branches: 1.8.18;
Correct definition of leap year. Make yeartonum and numtoyear use
full years so that year 2000 is correctly counted as a leap year.

Now NetBSD under SIMH picks up correct time-of-day clock value. It
used to be a day behind, since 2000 - 1900 = 100 and naive leap year
test wouldn't count it as a leap year.

branches: 1.7.4;
Remove `volatile' qualifier from argument types of
struct timeval passed to todr_gettime(9) and todr_settime(9).
We no longer have an ancient and volatile struct timeval `time'
global since we have switched to MI timercounter(9) on all port.

XXX1: some of these RTC drivers still assume 32bit time_t
XXX2: some of these should be rewritten to use todr_[gs]ettime_ymdhms()
XXX3: todr(9) man page doesn't mention todr_[gs]ettime_ymdhms()

branches: 1.6.60; 1.6.70;
Switch VAX over to generic TODR

branches: 1.5.40; 1.5.54; 1.5.58;
Make yeartonum/numtoyear visible.

branches: 1.4.2;
Styr upp deklarationen av clockchippsparametrarna.

Add some external variables.

Oops, I forgot to check this file in after clock changes.

Reworked time handling; now also handles clock chip CPUs correctly.

Remove clause 3 and 4 from TNF licenses

branches: 1.1.4; 1.1.6; 1.1.132; 1.1.134; 1.1.136;
Add coff_machdep.h (now need due to the recent exec_coff changes).

vax: PR port-vax/55415

Remove VAX-specific workaround to force pre-emption, as it is now
no longer needed.

tested by oster@

With the overhaul of the scheduler code the semantics of
ci_want_resched have changed, and for some reason vax
still requires ci_want_resched set to 1 in order to do
preemption. This commit contains a workaround for the
preemption issued discussed in PR#55415.

XXX pullup-10

branches: 1.106.2;

Support save/restore of AST levels in the PCB for context switching.

Code written by ragge@ , tested by oster@.

Improved the performance of kernel profiling on MULTIPROCESSOR, and possible to get profiling data for each CPU.

In the current implementation, locks are acquired at the entrance of the mcount
internal function, so the higher the number of cores, the more lock conflict
occurs, making profiling performance in a MULTIPROCESSOR environment unusable
and slow. Profiling buffers has been changed to be reserved for each CPU,
improving profiling performance in MP by several to several dozen times.

- Eliminated cpu_simple_lock in mcount internal function, using per-CPU buffers.
- Add ci_gmon member to struct cpu_info of each MP arch.
- Add kern.profiling.percpu node in sysctl tree.
- Add new -c <cpuid> option to kgmon(8) to specify the cpuid, like openbsd.
For compatibility, if the -c option is not specified, the entire system can be
operated as before, and the -p option will get the total profiling data for
all CPUs.

Fix false sharing problems with cpu_info. Identified with tprof(8).
This was a very nice win in my tests on a 48 CPU box.

- Reorganise cpu_data slightly according to usage.
- Put cpu_onproc into struct cpu_info alongside ci_curlwp (now is ci_onproc).
- On x86, put some items in their own cache lines according to usage, like
the IPI bitmask and ci_want_resched.

cpu_need_resched():

- Remove all code that should be MI, leaving the bare minimum under arch/.
- Make the required actions very explicit.
- Pass in LWP pointer for convenience.
- When a trap is required on another CPU, have the IPI set it locally.
- Expunge cpu_did_resched().

- Cleanup for dynamic sysctl:
- Remove unused *_NAMES macros for sysctl.
- Remove unused *_MAXID for sysctls.
- Move CTL_MACHDEP sysctl definitions for m68k into m68k/include/cpu.h and
use them on all m68k machines.

branches: 1.101.4; 1.101.6;
dumpconf(void) long doesn't exist, remove the prototype

PR kern/39714 by Henning Petersen

Update copyright notice for Ludd (remove clause 3 & 4).

branches: 1.99.4;
Implement MI IPI interface with cross-call support.

branches: 1.98.2;
use __unused instead of __USE and void cast to mark iterator variable unused
where needed (from phone)

__USE cii

make cpu_need_resched() macros consistent; __USE flags

branches: 1.95.2;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.94.2;
Change cpu_idle to be an inline which sets IPL to 1 and then back to 0
so simh can recognize the kernel is idle.

branches: 1.93.2; 1.93.6; 1.93.8;
device_t, cfdata_t, etc.
CFATTACH_DECL -> CFATTACH_DECL_NEW for sizeof(struct device).

branches: 1.92.2;
Support LWP_PC

branches: 1.91.2;
Switch to use <sys/device_if.h>

Implement CAS using a RAS for non-MP VAX systems. This technique uses the
atomicity of indirect addressing for correctness. It also uses the knowledge
of dereferencing an address outside the page table length will cause a PTELEN
trap. [Tested on netbsd-5]

A big bunch of bugfixes from Johnny Billquist. Highlights:
- Makes the VAX8600 work as expected (500kg of hardware :-)
- Fix a hard-tracked bug causing VAXen to hang at splhigh.

Implement high priority (XC_HIGHPRI) xcall(9) mechanism - a facility
to execute functions from software interrupt context, at SOFTINT_CLOCK.
Functions must be lightweight. Will be used for passive serialization.

OK ad@.

branches: 1.87.2; 1.87.4;
Remove `volatile' qualifier from argument types of
struct timeval passed to todr_gettime(9) and todr_settime(9).
We no longer have an ancient and volatile struct timeval `time'
global since we have switched to MI timercounter(9) on all port.

XXX1: some of these RTC drivers still assume 32bit time_t
XXX2: some of these should be rewritten to use todr_[gs]ettime_ymdhms()
XXX3: todr(9) man page doesn't mention todr_[gs]ettime_ymdhms()

Provide cpu_lwp_free* stubs in vax and powerpc.
Reported by <he>.

branches: 1.85.4; 1.85.14;
Rototill the vax code. Switch to devicet/PRIV_ALLOC. Cleanup vax autoconf
code. Move to prototype definitions. staticfy, constify, avoid casting.
Use device_* accessors.

Remove CTL_MACHDEP_NAMES, it's not used anywhere.

Ok by martin@.

A number of performance changes:
Change internal register SSP to contain curlwp insread curcpu(). This
shrinks the GENERIC by 2KB.
Add rwlock stubs (rw_enter, rw_exit, rw_tryenter).
Simplify simple lock code for uniprocessors.
Do SPL raise/lower in cpu_handle_ipi instead of simple_locks.

branches: 1.82.2; 1.82.6;
Make NetBSD/vax work again. Add support for __HAVE_FAST_SOFTINTS.
Add a few small optimizations.

Add cpu_intr_p (checks PSL_IS in PSL).
Change badaddr to take a volatile pointer

Don't need sys/lock.h

branches: 1.79.2; 1.79.8;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

ci_need_resched -> ci_want_resched

branches: 1.77.8; 1.77.10; 1.77.12;
merge yamt-idlelwp branch. asked by core@. some ports still needs work.

from doc/BRANCHES:

idle lwp, and some changes depending on it.

1. separate context switching and thread scheduling.
(cf. gmcgarry_ctxsw)
2. implement idle lwp.
3. clean up related MD/MI interfaces.
4. make scheduler(s) modular.

branches: 1.76.2; 1.76.4; 1.76.10;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.75.2;
Partially adapt the VAX port to the newlock2 changes. These are untested
but they do at least compile.

Switch VAX over to generic TODR

Add a comment indicating that the cpuid (derived from the autoconfiguration
unit number of the CPU) should be cached in the cpu_info.

branches: 1.72.4; 1.72.6; 1.72.8; 1.72.10; 1.72.12;
merge ktrace-lwp.

Fixes to make GENERIC.MP build again. Several changes:
o Rename global variable "tramp" to "vax_mp_tramp" to avoid warning
with -Wshadow when compiling the signal code.
o Rename a macro-local variable _s to __s in __cpu_simple_lock()
to avoid -Wshadow warning when MALLOC() is used (also declares _s).
o Follow up -Wcast-qual by making a number of function arguments const char*
where string literals are used.

branches: 1.70.12;
move some per-cpu data definitions to MI place so that they can be modified
without touching all ports. discussed on tech-kern@.

Add CPU_INFO_INTERATOR/FOREACH support.

Add #define cpu_lwp_free do { } while (/*CONSTCOND*/0)
(VAX systems don't need to do anything in cpu_lwp_free)

Rearrange process exit path to avoid need to free resources from different
process context ('reaper').

From within the exiting process context:
* deactivate pmap and free vmspace while we can still block
* introduce MD cpu_lwp_free() - this cleans all MD-specific context (such
as FPU state), and is the last potentially blocking operation;
all of cpu_wait(), and most of cpu_exit(), is now folded into cpu_lwp_free()
* process is now immediatelly marked as zombie and made available for pickup
by parent; the remaining last lwp continues the exit as fully detached
* MI (rather than MD) code bumps uvmexp.swtch, cpu_exit() is now same
for both 'process' and 'lwp' exit

uvm_lwp_exit() is modified to never block; the u-area memory is now
always just linked to the list of available u-areas. Introduce (blocking)
uvm_uarea_drain(), which is called to release the excessive u-area memory;
this is called by parent within wait4(), or by pagedaemon on memory shortage.
uvm_uarea_free() is now private function within uvm_glue.c.

MD process/lwp exit code now always calls lwp_exit2() immediatelly after
switching away from the exiting lwp.

g/c now unneeded routines and variables, including the reaper kernel thread

branches: 1.66.2;
Add machdep sysctl support. Support booted_device, consdev, and
printfataltraps.

Need to forward declare struct buf and struct pte for function prototypes.

Merge the nathanw_sa branch.

Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
by using this grammer.

- Added the new naming convention.
The name of the device switch must be <prefix>_[bc]devsw for auto-generation
of device switch tables.

- The backward compatibility of loading block/character device
switch by LKM framework is broken. This is necessary to convert
from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
the LKM framework will refer it to assign device major number dynamically.

branches: 1.62.4;
Major update of the vax pmap:
- Reinstall the "dynamic page table length" that was removed some
years ago.
- Limit the user page table submap to max 5% of available memory.
- Free the page table space when a process is swapped out.
- If the UPT submap runs out of space, throw away pmap mappings
using the same algorithm as for swapping processes.

As a result of this, 4MB machines are useable again and it's even possible
to compile a kernel for 2MB machines (but it will be slow... :-)

Still to do:
- Multiprocessor fixes.
- More profiling.

branches: 1.61.2; 1.61.8;
Don't need to prototype child_return() here, it's in <sys/proc.h>.

Add rudimentary multiprocessor support for DDB.

Add IPI_TBIA to flush the translation buffer.

Break out the MP-dependent calls. Add definitions for the IPI functions.

use _KERNEL_OPT

Add ci_cpuid.
Change the CLKF_ macros because the idle loop is now running at IPL1.

branches: 1.55.2;
Add prototype.

Make need_resched() take a "struct cpu_info *" argument. This
causes gives a primitive form of processor affinity. Its use in
roundrobin() still needs some work.

Add badaddr() field.

Allow printf's from slave CPUs by stealing the v_putc function.
Easier than expected because the printout lock is hold in the higher levels.

Code to spin up other CPUs on a VAX 8200 system.
Haven't solved the printf() problem yet, though.

Move spl macros from <machine/param.h> to <machine/intr.h>
Fix botch on my part and make the IPL_* match reality on VAX.
Redefine spl macro using the symbolic IPL_ instead of being hardcoded.
Move schedsoftnet, schedsoftclock from <machine/cpu.h> to <machine/intr.h>
Add a _setsirr macro for schedsoft*.
Add softintr function and framework.

Eliminate booted_from. extern'ed booted_device (for raidframe). nothing
outside autoconf.c in sys/arch/vax needs to deal with booted_device).

Use the cpu_info struct to store cpu-specific data in the same way in
both uniprocessor and multiprocessor environments. Use the otherwise
unused internal CPU register SSP to store the cpu_info pointer.
The macros curcpu(), curproc, cpu_number() and need_resched() are now the
same in both uniprocessor and multiprocessor environments.

Rewrite cpu_fork(), it now looks like and works as other ports' cpu_fork()
(calling child_return() etc...). Have fun, Jason!

branches: 1.46.2;
This need <sys/sched.h> to compile.

First sweep at scheduler state cleanup. Collect MI scheduler
state into global and per-CPU scheduler state:

- Global state: sched_qs (run queues), sched_whichqs (bitmap
of non-empty run queues), sched_slpque (sleep queues).
NOTE: These may collectively move into a struct schedstate
at some point in the future.

- Per-CPU state, struct schedstate_percpu: spc_runtime
(time process on this CPU started running), spc_flags
(replaces struct proc's p_schedflags), and
spc_curpriority (usrpri of processes on this CPU).

- Every platform must now supply a struct cpu_info and
a curcpu() macro. Simplify existing cpu_info declarations
where appropriate.

- All references to per-CPU scheduler state now made through
curcpu(). NOTE: this will likely be adjusted in the future
after further changes to struct proc are made.

Tested on i386 and Alpha. Changes are mostly mechanical, but apologies
in advance if it doesn't compile on a particular platform.

Add prototype for findcpu in _STANDALONE.

Ops, forgot to commit this.

First cut of multiprocessor support for vax. Still much to do before
other CPUs than the master can spin up.

Protect against multiple includes.

branches: 1.40.2; 1.40.4; 1.40.6;
Centralize the declaration and clearing of `cold'.

Define cpu_number() as discussed on tech-smp.

Clean up all bus handling stuff, it has become a mess the latest years.
Add a new bus; "ibus" that is the internal MicroVAX bus.

Better and more understandable way to find out CPU type.

Real-time clock is started on the same way on all CPUs, there is no
need for a special CPU-dependent hook for this.

Use "access_type" in pmap_enter() more intelligent.
Allocate device register space bigger than the logical page size
from the kernel map, thus decreasing the pre-allocated page table memory.

branches: 1.34.4;
Another giant change: Allocate register space dynamic instead of compiled-in.
This is done on a physical page size basis, instead of virtual (as the
(on vax yet non-existing) bus_* routines does). This is similar to the
way uba allocation is done.

Allocate (almost) all interrupt vectors dynamically. Simplifies much
work when adding support for new machines and devices.

Latent support for revamped "local bus" support.

configure() prototype is in <sys/device.h>

cpu_set_kpc() prototype is already in <sys/systm.h>.

Basic support for VS4000/60.

#ifdef _KERNEL whole this file.

Remove unnecessary code for interrupt vector handling.

Wall cleaning.

Fix clearing of redundant restart flag; CPU specific.
Also clean up a bit.

Actually do 'halt' or 'reboot' on MicroVAX.

Add definitions for DEC HW device numbers.

Basic change to cpu-config code. This will make support of new
cpu types much easier.

Remove bogus prototypes.

branches: 1.20.4;
Update prototypes to match new calling convention of functions that
find the boot device.

branches: 1.19.2;
Numerous changes to be able to put Bertram Barth's VAXstation support in.
(Some) Support for VAXstation 2000/MicroVAX 2000, VAXstation 3100/76.

Automatic changing of root device after boot now works.

Fixed all (proto)type errors. Fixes PR 2377.

Added prototypes to everything. Made all files compile with -Wall.

Changes due to 11/780 support. Raise splimp() to BR7.

Fix #includes.

MicroVAX III support added.

New file pcb.h. USRTEXT changed to 0x400.

BROKEN_SWAP removed, swapping verified OK.
pmap_collect(pmap) added as null define.

Removed cpu_set_init_frame() use.
Increased default limits of memory use, ridiculously small before.

define BROKEN_SWAP and/or cpu_swapout as appropriate.

mtpr support for 11/780 added. DELAY added. mcount() corrected.
trapframe fixed to support all registers.

Some bug fixes & update of pcb.

Def's for uVAXII added.

Lots of fixes...

Lots of updates & fixes.

new RCS ID format.

Changes to make files more 4.4/1.0B working.

branches: 1.1.2;
Initial VAX port merging.

vax/ddb(4): clean up machine dependent code and improve usability

First, let's garbage collect some dead code wrapped in #if 0/#endif
that were introduced in back in 1999 in revision 1.17 of db_machdep.c,
when VAX stack tracing was last reworked. There's also an unused
argument "stackbase" in db_dump_stack() that can go away.

Next, fix stack tracing on panic. The panicstr has already been printed
by the time we get here from db_panic(), and at least on !MULTIPROCESSOR
the panic stack trace caused a recursive panic immediately. While here,
add tracing by lwp and proc addresses. The code for tracing a process or
lwp should live in its own function, and we can rearrange the logic in
db_stack_trace_print() to be a bit clearer.

While here, add some basic memory access checks so we don't suffer
from recursive panics all the time. For the same reason, get the
process with db_find_proc() rather than proc_find_raw().

branches: 1.20.34; 1.20.40;
Cleanup and clarify the ELFSIZE mess:

We now have 2 variables automatically set in elf_machdep.h:

ARCH_ELFSIZE: the size for userland binaries
KERN_ELFSIZE: the size for the kernel binaries

DB_ELFSIZE has been deleted and KERN_ELFSIZE should have always the
same values DB_ELFSIZE used to have.

In sys/exec_elf.h, if ELFSIZE is not set, it is set to KERN_ELFSIZE
for the kernel and ARCH_ELFSIZE for userland. These defaults should
eliminate the need for most manual ELFSIZE setting.

branches: 1.19.12;
Cleanup trapframe handling. Instead of keeping a trapframe pointer in the
pcb, put in the mdlwp instead. We had a dummy field so it didn't grow in
size. This also follows the practice that mips and powerpc follow that a
pointer to the user trapframe is in l->l_md.md_utf. Make trapframe members
start with tf_

Introduce DDB_EXPR_FMT and replace the logic around DB_EXPR_T_IS_QUAD.

branches: 1.17.2;
Machine dependent code is considered as part of UVM. Include
internal API header.

branches: 1.16.14; 1.16.16;
Drop support for compiling a.out kernel. Elves rule!

branches: 1.15.4; 1.15.6; 1.15.10;
Rototill the vax code. Switch to devicet/PRIV_ALLOC. Cleanup vax autoconf
code. Move to prototype definitions. staticfy, constify, avoid casting.
Use device_* accessors.

branches: 1.14.38; 1.14.58; 1.14.62;
closes: PR kern/32359

modifies machine/db_machdep.h: BKPT_SET(inst) to BKPT_SET(inst, addr) for all archs ie; passess the
breakpoint address as well.

Patch from cherry@mahiti.org

branches: 1.13.2;
Fix various places where assignment happen to casted lvalues.
(t)v = foo; is not legal C.

branches: 1.12.18; 1.12.32; 1.12.34; 1.12.36; 1.12.38;
Add a BKPT_ADDR() macro which gives MD code a chance to munge a
breakpoint address before it's used. Currently a no-op on all but sh5.

This is useful on sh5, for example, to mask off the instruction
type encoding in the bottom two address bits, and makes it possible
to do "db> break $rXX" instead of manually munging the address.

Nuke local extern label_t *db_recover; it's now in <ddb/db_extern.h>

branches: 1.10.2; 1.10.8;
Add rudimentary multiprocessor support for DDB.

Include ELF symbol in DDB is we are an ELF kernel.

branches: 1.8.2;
remove include of <vm/vm.h>. <vm/vm.h> -> <uvm/uvm_extern.h>

expunge vm_offset_t and vm_size_t.
add bus_dma support for the vs4000 dma translation map (sgmap).
enhance the vsbus for the lance to work with it.
remove the sgmap init code from ka46/48/49.c

branches: 1.6.12;
Basic support for VS4000/60.

Wall cleaning.

#define DB_AOUT_SYMBOLS

FIXUP_PC_AFTER_BREAK now takes an arg of type db_regs_t *

Added prototypes to everything. Made all files compile with -Wall.

DDB support. splddb() and trapcode for ddb.

s/helt/held+s/eroneously/erroneously/+s/splitted/split/+s/recommented/recommended/

Drop MAXPARTITIONS down to 12 - we do not have more space to store a
larger disklabel in the bootblocks at least on some supported machines.
Keep the extended major/minor sheme compatible with the 6.0 release and
note that we had a bigger MAXPARTITIONS in between.

branches: 1.6.2;
- Increase MAXPARTITIONS for vax from 8 to 16, using the standard NetBSD
mechanism to ensure all existing /dev nodes continue to work
- Adjust boot block layout to fit additional partitions
- Adjust number of inodes on install media

branches: 1.5.2; 1.5.8;
Add getlabelusesmbr(), as proposed in
http://mail-index.netbsd.org/tech-userlevel/2011/08/25/msg005404.html
This is used by disk tools such as disklabel(8) to dynamically decide is
the undelyling platform uses a disklabel-in-mbr-partition or not
(instead of using a compile-time list of ports).
getlabelusesmbr() reads the sysctl kern.labelusesmbr, takes its value from the
machdep #define LABELUSESMBR.
For evbmips, make LABELUSESMBR 1 if the platform uses pmon
as bootloader, and 0 (the previous value) otherwise.

Fixed bug that caused d partition being treated as c.
RAW_PART is 2, not 3.

branches: 1.3.8;
LOCORE -> _LOCORE

mtpr support for 11/780 added. DELAY added. mcount() corrected.
trapframe fixed to support all registers.

move arch dependence to archs. clean up a bit. deal with weird MAXPARTITONS.

vax/elf_machdep.h: permit usage with <sys/elfdefinitions.h>.

PR lib/59564

Cleanup and clarify the ELFSIZE mess:

We now have 2 variables automatically set in elf_machdep.h:

ARCH_ELFSIZE: the size for userland binaries
KERN_ELFSIZE: the size for the kernel binaries

DB_ELFSIZE has been deleted and KERN_ELFSIZE should have always the
same values DB_ELFSIZE used to have.

In sys/exec_elf.h, if ELFSIZE is not set, it is set to KERN_ELFSIZE
for the kernel and ARCH_ELFSIZE for userland. These defaults should
eliminate the need for most manual ELFSIZE setting.

branches: 1.5.166;
Add support for dumping ELF-cormat core files.

branches: 1.4.4; 1.4.8;
Reflect the new reality.

Move dl* function definitions to libc on ELF.
Based on the patch supplied by Takuya Shiozaki <tshiozak@astec.co.jp>.
See http://mail-index.netbsd.org/tech-userlevel/2000/02/23/0000.html.

Update to match new SVR4-style definition names in <sys/exec_elf.h>.

branches: 1.1.2; 1.1.4; 1.1.6;
Initial VAX ELF32 support (mostly untested). It's checked primarily for
testing and archival for now. I don't expect anyone to work with it
since the binutils and gas changes are still pending. But you got to
crawl before you walk.

In the `MY THAT'S GROSS' department...
Eliminate the recursive include of machine/endian.h from sys/endian.h.

Foolish consistency. Mainly, always use underscores and sys/endian.h.

branches: 1.15.2;
Include <sys/endian.h> after defining whether where are little- or
big-endian. i386, pc532 and vax still include <machine/byte_swap.h>
and define macros for the {n,h}to{h,n}*() functions. mips also
defines some endian-independent assembly-code aliases for unaligned
memory accesses.

Mark [hn]to[nh][ls]() with __const__, so they are subject to CSE.

Move the bswap functions from libutil to libc (this bups the
minor of libc and the major of libutil). For little-endian architectures
merge the bnswap() assembly versions with nto* and hton* using symbols
aliasing. Use symbol renaming for the bswap function in this case to avoid
namespace pollution.
Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian
machines, common code for inline macros go in machine/byte_swap.h
Sync libkern with libc.
Adjust #include in kernel sources for machine/bswap.h.

Support for compound statements enclosed in parenthes to appear as
expressions is a GNU C extension; mark as such them with __extension__ to
suppress portability warnings. Addresses kern/3562 and misc/6185, as suggested
by Dave Sainty <dave@dtsp.co.nz>.

EGCS fixes. Implement htons as a C macro instead of asm; generates as
good code as the asm implementation _and_ can be optimized.

Lots of kernlib functions rewritten as inline macros.

Add byte-swapping functions (bswap16, bswap32, bswap64) to libkern.
Only assembly version for i386 bswap16 and bswap32 for now (bswap64 uses
bswap32). Contribution of assembly versions of these are welcome.
Add byte-swapping of ext2fs metadata for big-endian systems.
Tested on i386 and sparc.

branches: 1.8.10;
use in_addr_t and in_port_t

Added prototypes to everything. Made all files compile with -Wall.

Bug fix in byte_swap_word(); didn't always make it.

nton?/ntoh? moved to endian.h.

KERNEL -> _KERNEL

Lots of fixes...

new RCS ID format.

branches: 1.1.2;
Initial VAX port merging.

Move the definitions of ntohl() and friends into sys/endian.h where they
are defined in terms of bswap32() and bswap16().
This makes the definition be in the same place for all systems regardless
of creed^Wendianness.

branches: 1.2.4; 1.2.44; 1.2.56;
Use machine instead of vax in include path.

branches: 1.1.2;
In the `MY THAT'S GROSS' department...
Eliminate the recursive include of machine/endian.h from sys/endian.h.

moved to aout_machdep.h (via repository copy)

relocation_info added.

new RCS ID format.

branches: 1.2.2;
Minor updates of some errouneous parameters.

Initial VAX port merging.

merge ktrace-lwp.

Oops, s/DECIMAL_DIGIT/DECIMAL_DIG/.

C99: provide DECIMAL_DIGIT.

C99: provide FLT_EVAL_METHOD.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.5.46;
Make DBL_MIN and DBL_MAX makes limits.h (otherwise CPP complains when
building xlint).

Minor changes.

Multiple-inclusion crap, correct precision of DBL_*, etc.

branches: 1.2.18;
new RCS ID format.

branches: 1.1.2;
Initial VAX port merging.

Update copyright notice for Ludd (remove clause 3 & 4).

branches: 1.2.176; 1.2.196;
more cleanup. use __builtin_frame_address(0) instead of our funky
FRAMEOFFSET macro. define an interrupt call frame and use that directly
instead of some magic offsets. Make boot autoconf.o use the current
reality.

branches: 1.1.30; 1.1.38;
Function call definition on stack. (calls frame)

Retire compat_ibcs2, as discussed on tech-kern@. FreeBSD did the same
recently.

branches: 1.12.62; 1.12.64;
Change u_long to vaddr_t/vsize_t in exec code where appropriate (mostly
involves setregs and vmcmds). Should result in no code differences.

Remove clause 3 and 4 from TNF licenses

branches: 1.10.6; 1.10.8; 1.10.10;
Make sysmachine take a lwp instead of a proc.

branches: 1.9.40; 1.9.46;
welcome to syscall_intern.

branches: 1.8.4; 1.8.6; 1.8.8; 1.8.10;
merge ktrace-lwp.

branches: 1.7.16;
Add SA_SIGINFO support for VAX.

Fix "constify sendsig/trapsignal" fallout for non-siginfo'd archs. Test
compiled on most architectures.

branches: 1.5.2;
Merge the nathanw_sa branch.

Add kernel support for having userland provide the signal trampoline:

* struct sigacts gets a new sigact_sigdesc structure, which has the
sigaction and the trampoline/version. Version 0 means "legacy kernel
provided trampoline". Other versions are coordinated with machine-
dependent code in libc.
* sigaction1() grows two more arguments -- the trampoline pointer and
the trampoline version.
* A new __sigaction_sigtramp() system call is provided to register a
trampoline along with a signal handler.
* The handler is no longer passed to sensig() functions. Instead,
sendsig() looks up the handler by peeking in the sigacts for the
process getting the signal (since it has to look in there for the
trampoline anyway).
* Native sendsig() functions now select the appropriate trampoline and
its arguments based on the trampoline version in the sigacts.

Changes to libc to use the new facility will be checked in later. Kernel
version not bumped; we will ride the 1.6C bump made recently.

branches: 1.3.2; 1.3.6; 1.3.10; 1.3.18;
Move COFF_LDPGSZ to ibcs2_machdep.h. Fix nmagic loader to deal with
subpage mappings.

branches: 1.2.4;
Add some machine dependent stuff for vax.

branches: 1.1.2;
close the i386 ibcs2 machdep.h; nothing really machine dependent in it yet.

Include <sys/common_int_const.h> if __INTMAX_C_SUFFIX__ is defined.

branches: 1.3.18;
fix wrong integer promotion rule(removed U suffix from UINT{8,16}_C).
see ISO/IEC 9899:1999 7.18.4.3.

branches: 1.2.20; 1.2.22;
Remove clause 3 and 4 from TNF licenses

branches: 1.1.2; 1.1.4; 1.1.12; 1.1.130; 1.1.132; 1.1.134;
Add definitions of C99 integer constant macros.

Revert back to 1.7.

Fix SCN?FAST{8,16} formats to match reality (int) in gcc4.8.3

Revert previous changes, gcc configuration will be adapted instead.

intptr_t and uintptr_t are not long any more.

include <sys/common_int_fmtio.h> if __INTPTR_FMTd__ is defined

branches: 1.4.38;
Drop support for compiling a.out kernel. Elves rule!

branches: 1.3.2; 1.3.6;
Remove clause 3 and 4 from TNF licenses

branches: 1.2.2; 1.2.10; 1.2.128; 1.2.130; 1.2.132;
Add definitions for C99 fastest minimum-width integer types.

branches: 1.1.2;
Add definitions of C99 integer format conversion macros.
XXX Fastest minimum-width integer types haven't been decided upon yet.

Include <sys/common_init_limits.h> if __SIG_ATOMIC_MAX__ is defined.

branches: 1.8.38;
Drop support for compiling a.out kernel. Elves rule!

branches: 1.7.2; 1.7.6;
Remove clause 3 and 4 from TNF licenses

branches: 1.6.16; 1.6.18; 1.6.20;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

Fix definitions of UCHAR_MAX/USHRT_MAX and related
types. C99 requires that these definitions promote to (signed/unsigned)
integer the same way as the types the definition is for. And since
unsigned char/short fit into an "int" on all our archs and thus promote
to signed int, the definitions must not be unsigned.
Fixes PR lib/31306 by Neil Booth.

branches: 1.4.30; 1.4.38; 1.4.44; 1.4.48; 1.4.50;
merge ktrace-lwp.

branches: 1.3.12;
Factor out W{CHAR,INT}_{MAX,MIN} into their own header file.

branches: 1.2.2; 1.2.10; 1.2.26;
Add definitions for C99 fastest minimum-width integer types.

branches: 1.1.2;
Add definitions of C99 specified-width integer type limits.
XXX Fastest minimum-width integer types haven't been decided upon yet.

include <sys/common_int_mwgwtypes.h> if __UINT_FAST64_TYPE__ is defined.

branches: 1.4.44;
Remove clause 3 and 4 from TNF licenses

branches: 1.3.74; 1.3.76; 1.3.78;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

branches: 1.2.2; 1.2.10; 1.2.42;
Add definitions for C99 fastest minimum-width integer types.

branches: 1.1.2;
Add definitions of C99 minimum-width and greatest-width integer types.
XXX Fastest minimum-width integer types haven't been decided upon yet.

Include <sys/common_int_types.h> if __UINTPTR_TYPE__ is defined.

branches: 1.11.38;
Drop support for compiling a.out kernel. Elves rule!

branches: 1.10.74; 1.10.78; 1.10.80; 1.10.84;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

branches: 1.8.2;
Include <sys/cdefs.h> for __signed; related to lib/30072.

branches: 1.7.6; 1.7.14;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.6.8; 1.6.24;
* Move definitions of exact-width integer types from <machine/types.h>
to <sys/types.h> and <sys/stdint.h>.
* Add a new C99 <stdint.h> header, which provides integer types of
explicit width, related limits and integer constant macros.
* Extend <inttypes.h> to provide <stdint.h> definitions and format
macros for printf() and scanf().
* Add C99 strtoimax() and strtoumax() functions.
* Use the latter within scanf().
* Add C99 %j, %t and %z printf()/scanf() conversions for
intmax_t, pointer-type and size_t arguments.

Catch up with ansi.h rev. 1.12: define intptr_t and uintptr_t as long
integers in ELF environments, like is done with ptrdiff_t.

Replace the 'unsigned __COMPILER_INT64__' construct with a new name,
__COMPILER_UINT64__, to be supplied - if such a case is made, it shouldn't
be assumed that the unsigned type-specifier may be applied to it.

branches: 1.3.2;
replace 'long long' with int64_t to compile stand alone program with
compiler other than GCC.

branches: 1.2.2;
Resolve some formatting nits; add __intptr_t and __uintptr_t.

Add <machine/int_types.h>, which provides namespace-pure definitions
of exact-width integer types.

vax/intr.h: Expose ipl_cookie_t to _KMEMUSER for crash(8).

branches: 1.30.4;
In order to prevent _mcount() from being recursively called when built with COPTS=-O0,
sprinkle `__always_inline' to make _mcount() be generated as a single function.

Revert using __insn_barrier(); changed to use "memory" clobber in the
mtpr() macro.

Add __insn_barrier() to _splset(). See also kern/38637.

branches: 1.27.24;
Make NetBSD/vax work again. Add support for __HAVE_FAST_SOFTINTS.
Add a few small optimizations.

Change IPL_SOFTBIO to 0x0b

Interrupt handling changes, in discussion since February:

- Reduce available SPL levels for hardware devices to none, vm, sched, high.
- Acquire kernel_lock only for interrupts at IPL_VM.
- Implement threaded soft interrupts.

branches: 1.24.16; 1.24.18; 1.24.24;
Shrink VAX kmutex from 12 bytes to 8. Fix various LOCKDEBUG/DIAGNOSTIC
problems.

branches: 1.23.2; 1.23.6;
Remove spllowersoftclock() and CLKF_BASEPRI(), and always dispatch callouts
via a soft interrupt. In the near future, softclock will be run from process
context.

Partially adapt the VAX port to the newlock2 changes. These are untested
but they do at least compile.

merge yamt-splraiseipl branch.

- finish implementing splraiseipl (and makeiplcookie).
http://mail-index.NetBSD.org/tech-kern/2006/07/01/0000.html
- complete workqueue(9) and fix its ipl problem, which is reported
to cause audio skipping.
- fix netbt (at least compilation problems) for some ports.
- fix PR/33218.

branches: 1.20.14; 1.20.16;
Change "inline" back to "__inline" in .h files -- C99 is still too
new, and some apps compile things in C89 mode. C89 keywords stay.

As per core@.

branches: 1.19.2; 1.19.4; 1.19.6;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

Give splraiseipl() to the vax, from Johnny Billquist

implement splraiseipl() for the following ports.
evbppc, evbmips, evbsh3, hp700, mac68k, vax, x68k.

branches: 1.16.2; 1.16.8;
Rename val -> __val in macros, to avoid variable shadowing, as reported
by Johnny Billquist. While here, add spaludio().

Tidy up the namespace: lint -> __lint__.

branches: 1.14.2; 1.14.4;
Rename IPL_IMP -> IPL_VM.

branches: 1.13.8; 1.13.12;
Add splipi().

Remove the use of splimp() from the NetBSD kernel. splnet()
and only splnet() is allowed for the protection of data structures
used by network devices.

Add spluba().

branches: 1.10.2;
Make softclock a generic soft interrupt of the API is available,
adding the requisite void * argument to softclock().

Rename __GENERIC_SOFT_INTERRUPTS to __HAVE_GENERIC_SOFT_INTERRUPTS,
and place the definition in <machine/types.h>. This can now be used
as a flag to indicate whether or not <machine/intr.h> can be included
to get the generic soft interrupt API.

Make sure everybody has an splvm() and equate it with splimp() (splimp()
is the historical name for this interrupt level, and the historical name
is going to go away in the near future).

Add spllock(). See spl(9) for details.

Make sure we provide splsched() as described in spl(9).

GCC 2.96 wants the = constraint first. Older gcc(s) don't care.

Make spl0 & spllowersoftclock return void.

no need to raise ipl since the definition of softintr_schedule is that
it's from at or above softipl.

Move spl macros from <machine/param.h> to <machine/intr.h>
Fix botch on my part and make the IPL_* match reality on VAX.
Redefine spl macro using the symbolic IPL_ instead of being hardcoded.
Move schedsoftnet, schedsoftclock from <machine/cpu.h> to <machine/intr.h>
Add a _setsirr macro for schedsoft*.
Add softintr function and framework.

branches: 1.1.12; 1.1.20;
Initial steps to getting the VAX to use the MI driver framework.

A big bunch of bugfixes from Johnny Billquist. Highlights:
- Makes the VAX8600 work as expected (500kg of hardware :-)
- Fix a hard-tracked bug causing VAXen to hang at splhigh.

branches: 1.12.44; 1.12.64; 1.12.66;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.11.26;
merge ktrace-lwp.

branches: 1.10.16;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.9.2;
Add some instrumentation and clean up some VAX8600 code.
From Johnny Billquist.

branches: 1.8.8;
Add a VAXANY type. Eventually to used in INSTALL / GENERIC to easily
include support for all VAX platforms

branches: 1.7.4;
Put all cputype definitions in one file instead of separate files.
This was becoming unmaintainable.

branches: 1.6.2;
Revamp the VAX interrupt handling code. Make it compatible with all the
other ports. Clean up some things.

branches: 1.5.2;
Ungarble the copyright notice.

branches: 1.4.24;
Support for VAX 8600/8650 added. Works with lots of Unibus adapters,
and will probably work with Massbus adapters as well. (Not tested,
but it's the same code as for 11/780). Ubareset's may cause crashes
on 8600 also like 11/780, but they are more uncommon. No support
for console RL02 yet, but it's likely to come.

No need anymore.

new RCS ID format.

branches: 1.1.2;
Initial VAX port merging.

Update copyright notice for Ludd (remove clause 3 & 4).

branches: 1.5.156; 1.5.176;
Add multiple inclusion protection.

branches: 1.4.30;
Change backplace0 to mainbus0 (for consistency with other ports).
Remove unused function protocols from ka410.h and ka43.h
Fix some ka46 missing references

Remove unnecessary code for interrupt vector handling.

Basic change to cpu-config code. This will make support of new
cpu types much easier.

branches: 1.1.6;
Numerous changes to be able to put Bertram Barth's VAXstation support in.
(Some) Support for VAXstation 2000/MicroVAX 2000, VAXstation 3100/76.

Update copyright notice for Ludd (remove clause 3 & 4).

branches: 1.3.156; 1.3.176;
Add multiple inclusion protection.

branches: 1.2.32;
Enable use of secondary cache, if present.

Numerous changes to be able to put Bertram Barth's VAXstation support in.
(Some) Support for VAXstation 2000/MicroVAX 2000, VAXstation 3100/76.

Update copyright notice for Ludd (remove clause 3 & 4).

branches: 1.7.122; 1.7.142;
merge ktrace-lwp.

Fix halt/reboot register write syntax. From Johnny Billquist.

branches: 1.5.6;
Add multiple inclusion protection.

branches: 1.4.30;
Change backplace0 to mainbus0 (for consistency with other ports).
Remove unused function protocols from ka410.h and ka43.h
Fix some ka46 missing references

Wall cleaning.

Updates to KA43 (VS3100/76) support by Bertram Barth.

Numerous changes to be able to put Bertram Barth's VAXstation support in.
(Some) Support for VAXstation 2000/MicroVAX 2000, VAXstation 3100/76.

Update copyright notice for Ludd (remove clause 3 & 4).

branches: 1.3.156; 1.3.176;
Add multiple inclusion protection.

branches: 1.2.30;
Cache and microsecond clock resolution on KA46.

Basic support for VS4000/60.

Fix various typos in comments. Also add missing NetBSD RCS Id in some of these files.

Update copyright notice for Ludd (remove clause 3 & 4).

branches: 1.3.156; 1.3.176;
Add multiple inclusion protection.

branches: 1.2.12;
Add some defines gleaned from OpenVMS to enable cache on the 4000/VLC.

branches: 1.1.8;
Basic KA48 (VAXstation 4000 VLC) support.
From Michael Kukat <michael@camaronet.de>

merge ktrace-lwp.

Uppercase CPU, plural is CPUs.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.5.24;
Move KA630 definitions from boot/boot/consio.c to here.

Revamp the VAX interrupt handling code. Make it compatible with all the
other ports. Clean up some things.

branches: 1.3.14;
Wall cleaning.

Actually do 'halt' or 'reboot' on MicroVAX.

Numerous changes to be able to put Bertram Barth's VAXstation support in.
(Some) Support for VAXstation 2000/MicroVAX 2000, VAXstation 3100/76.

fix various typos, mainly in comments, but also log messages, docs, game text.

merge ktrace-lwp.

Uppercase CPU, plural is CPUs.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.9.6;
Add multiple inclusion protection.

branches: 1.8.6;
Use comments around the token after a #endif.

branches: 1.7.16;
Clean up all bus handling stuff, it has become a mess the latest years.
Add a new bus; "ibus" that is the internal MicroVAX bus.

Actually do 'halt' or 'reboot' on MicroVAX.

Improve sub-type identification of the CVAX CPU, for later cache handling.

branches: 1.4.8;
Fixed all (proto)type errors. Fixes PR 2377.

Added prototypes to everything. Made all files compile with -Wall.

LOCORE -> _LOCORE

MicroVAX III support added.

Update copyright notice for Ludd (remove clause 3 & 4).

branches: 1.3.156; 1.3.176;
Add multiple inclusion protection.

branches: 1.2.8;
Some defines for the 6000/400 CPU.

branches: 1.1.2; 1.1.4;
Complete support for VAX 4000/300. From Michael Kukat. (michael@camaronet.de)

Update copyright notice for Ludd (remove clause 3 & 4).

branches: 1.2.156; 1.2.176;
Add multiple inclusion protection.

branches: 1.1.2; 1.1.10;
Oops, forgot this file.

Update copyright notice for Ludd (remove clause 3 & 4).

branches: 1.1.4; 1.1.6; 1.1.28; 1.1.46;
Patches from Brad Parker to support vax730.

Update copyright notice for Ludd (remove clause 3 & 4).

branches: 1.10.156; 1.10.176;
Add multiple inclusion protection.

branches: 1.9.20;
Clean up all bus handling stuff, it has become a mess the latest years.
Add a new bus; "ibus" that is the internal MicroVAX bus.

Remove bogus prototypes.

branches: 1.7.6;
Numerous changes to be able to put Bertram Barth's VAXstation support in.
(Some) Support for VAXstation 2000/MicroVAX 2000, VAXstation 3100/76.

Fixed all (proto)type errors. Fixes PR 2377.

Added prototypes to everything. Made all files compile with -Wall.

Fix #includes.

11/750 specific things moved to ka750.h

new RCS ID format.

branches: 1.1.2;
Initial VAX port merging.

Rototill the vax code. Switch to devicet/PRIV_ALLOC. Cleanup vax autoconf
code. Move to prototype definitions. staticfy, constify, avoid casting.
Use device_* accessors.

branches: 1.8.50; 1.8.70; 1.8.74;
merge ktrace-lwp.

branches: 1.7.16;
Uppercase CPU, plural is CPUs.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.5.6;
Add multiple inclusion protection.

branches: 1.4.8;
Add define for IPI vector.

branches: 1.3.6;
Revamp the VAX interrupt handling code. Make it compatible with all the
other ports. Clean up some things.

branches: 1.2.8;
Allocate (almost) all interrupt vectors dynamically. Simplifies much
work when adding support for new machines and devices.

Support for VAX8200; the ka820/ka825 CPUs.

Update copyright notice for Ludd (remove clause 3 & 4).

branches: 1.5.48; 1.5.68;
Rototill the vax code. Switch to devicet/PRIV_ALLOC. Cleanup vax autoconf
code. Move to prototype definitions. staticfy, constify, avoid casting.
Use device_* accessors.

branches: 1.4.50; 1.4.70; 1.4.74;
merge ktrace-lwp.

branches: 1.3.16;
Uppercase CPU, plural is CPUs.

branches: 1.2.6;
Add multiple inclusion protection.

branches: 1.1.2; 1.1.10;
Support for the KA88 CPU and the NMI backplane.

No need anymore.

new RCS ID format.

branches: 1.1.2;
Initial VAX port merging.

Remove clause 3 and 4 from TNF licenses

branches: 1.4.74; 1.4.76; 1.4.78;
merge ktrace-lwp.

Fix comments regarding configration bounaries

Update RESIDUE_LW[01] to their correct offsets

branches: 1.1.6; 1.1.30;
Initial definition of registers for VS400 LCG cards. Still needs more.

Remove clause 3 and 4 from TNF licenses

branches: 1.1.4; 1.1.128; 1.1.130; 1.1.132;
Support to control the leds on VAXstations, taken from Sun3 and ported
to vax by Shinmyoh Koji (yesu@rb3.so-net.ne.jp).

Fix wrong scoping of {U,}LLONG_MAX. More cases, not just amd64.
PR 53298 from Roberto E. Vargas Caballero.

branches: 1.20.34; 1.20.36;
add missing SSIZE_MIN