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: 1.50.32;
Add multiboot 2 support to x86 bootloaders

multiboot 2 is required to boot Xen on an EFI system.
This also require a kernel patch for properly discovering
the ACPI RSDP, which is available after 20190912, in
src/sys/arch/x86/acpi/acpi_machdep.c 1.26-1.28

There are a few missing bit in this multiboot 2 implementation
(which are unused by Xen):
- Header tags Address, Freambuffer, and Relocatable are ignored
- Tags APM and Network are not provided
- Tags ACPI old and ACP new are only provided for ACPI boot
- Tag boot device does not provides the subpart (BSD disklabel partition)

Notes:
- multiboot2 is disabled in dosboot, otherwise the binary
gets too big and build fails.
- in src/sys/arch/i386/stand/efiboot, consinit() is renamed
as efi_consinit() to avoid prototype conflicts in src/sys/sys/systm.h

branches: 1.49.4;
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: 1.48.2; 1.48.4;
Remove vm86.

Pass 4.

Remove ibcs2_machdep.h on i386, and don't install it.

Move freebsd_machdep.h into sys/compat/freebsd, and don't install it. Now,
the compat_freebsd files are all contained in sys/compat/freebsd.

Unlink svr4_machdep.h.

branches: 1.44.10;
Add cpu_rng, a framework for simple on-CPU random number generators.

branches: 1.43.4;
Rename sljitarch.h to sljit_machdep.h.

branches: 1.42.2;
Change i386 to use x86/fpu.c instead of i386/isa/npx.c
This changes the trap10 and trap13 code to call directly into fpu.c,
removing all the code for T_ARITHTRAP, T_XMM and T_FPUNDA from i386/trap.c
Not all of the code thate appeared to handle fpu traps was ever called!
Most of the changes just replace the include of machine/npx.h with x86/fpu.h
(or remove it entirely).

branches: 1.41.2;
Build sljit test when MKSLJIT != no and set MKSLJIT to yes on amd64 and i386.

branches: 1.40.2;
on x86, <machine/cpufunc.h> only pulls in <x86/cpufunc.h>. The latter
is not installed to userland and noone missed it, so the former ones
can not be useful either. Don't install them.

branches: 1.39.2;
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.

On i386, good-bye <machine/bus.h>.

Add support for fenv.h interface for i386 and amd64.

Submitted by Stathis Kamperis as part of GSoC 2010 and ported from
FreeBSD.

branches: 1.36.10; 1.36.24; 1.36.30; 1.36.32;
- Make __cpu_simple_lock and similar real functions and patch at runtime.
- Remove old x86 atomic ops.
- Drop text alignment back to 16 on i386 (really, this time).
- Minor cleanup.

branches: 1.35.2; 1.35.6;
- Remove I486_CPU, I586_CPU, I686_CPU options. They buy us nothing and
clutter the code significantly.
- Remove pccons.

branches: 1.34.6; 1.34.12; 1.34.22; 1.34.24; 1.34.28; 1.34.30;
Merge newlock2 to head.

branches: 1.33.4;
don't install <machine/db_machdep.h>, this is kernel only

branches: 1.32.2;
Revert yesterday's change that attempted to fix the detection of the
boot device when using a Multiboot boot loader. It couldn't work because
these boot loaders do not pass a checksum of the disk so matchbiosdisk()
cannot really find any matches. I should have gone to sleep before
commiting...

Found by xtraeme@.

branches: 1.31.2;
When booting an i386 kernel with Multiboot, properly detect the boot device
by looking it up in the x86_alldisks table (instead of trying to match it
to 'wd*' manually).

In order to do this, move the cpu_rootconf function from x86 common code
to amd64 and i386 specific one. This way, i386 can do an extra step (call
the appropriate Multiboot code) in the appropriate place (after
x86_matchbiosdisks and before findroot()).

Implement support for 'The Multiboot Specification' so that i386 kernels
can be booted directly from Multiboot-compliant boot loaders (e.g. GRUB).
See the added multiboot(8) manual page for more information.

No objections in tech-kern@; only positive comments.

branches: 1.29.2; 1.29.4;
merge ktrace-lwp.

branches: 1.28.2;
"loadfile_machdep.h" should not be installed as pointed out by
Izumi Tsutsui. This needs to be fixed in the build process.

Install "loadfile_machdep.h" to fix build of "libsa".

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

branches: 1.25.2;
Don't install machine/mouse.h on i386 and prep; there are no users for
the old busmouse interface any longer, we use wsmouse now.

Merge the nathanw_sa branch.

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

install intrdefs.h so it can be used by intr.h (and libkvm)

Merge Bill Sommerfeld's i386 MP branch. This code has some known
caveats, but works quite well in a lot of MP cases, and all
UP cases that I have tested. Parts of this will hopefully be
reworked in the not-too-distant future.

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: 1.19.2; 1.19.8; 1.19.12;
Add mtrr.h to INCS list to get installed on a make includes

branches: 1.18.4; 1.18.6;
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 integer constant macros.
Tidy Makefiles up a little.

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

branches: 1.14.4;
Machine pmc.h

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

Require that each each MACHINE/MACHINE_ARCH supply a lock.h. This file
contains the values __SIMPLELOCK_LOCKED and __SIMPLELOCK_UNLOCKED, which
replace the old SIMPLELOCK_LOCKED and SIMPLELOCK_UNLOCKED. These files
are also required to supply inline functions __cpu_simple_lock(),
__cpu_simple_lock_try(), and __cpu_simple_unlock() if locking is to be
supported on that platform (i.e. if MULTIPROCESSOR is defined in the
_KERNEL case). Change these functions to take an int * (&alp->lock_data)
rather than the struct simplelock * itself.

These changes make it possible for userland to use the locking primitives
by including <machine/lock.h>.

Install "endian_machdep.h" required for "sys/endian.h".

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.

Don't let loadfile_machdep.h make it to /usr/include - the i386
stand Makefiles already set up the compile environment so that
machine/loadfile_machdep.h can be found.

branches: 1.8.2; 1.8.4; 1.8.6;
PMAP_NEW is no longer optional on the i386; the old pmap's page table
allocation strategy no longer works at all. Move pmap.new.* to pmap.*.

To read the revision history of PMAP_NEW up until this merge, use cvs
rlog of the old pmap.new.* files.

MD defines for the MI loadfile

branches: 1.6.4;
Add an ieee.h.

Add missing backslashes between continued lines.

Oups, need byte_swap.h too. Pointed out by Robert V. Baron

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.

linux_machdep.h has moved.

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.

Disable SSE and AVX for kernel modules too.

branches: 1.2.2;
Now that GCC 4.8 on i486 has stolen the frame pointer, do like amd64 and
add -fno-omit-frame-pointer to kernel DEFCOPTS and modules CFLAGS.

branches: 1.1.4; 1.1.8; 1.1.22; 1.1.26; 1.1.40;
Enable SSP (Stack Smash Protection) in x86 kernels by default (except
in i386 *TINY kernels). The NetBSD/i386 "ALL" kernel is unconditionally
compiled with SSP enabled.

Change approved by the core team.

MI implementation of AcpiAcquireGlobalLock and AcpiReleaseGlobalLock.

Replace asm implementation of ACPI global lock functions with C equivalents.

branches: 1.9.2; 1.9.4; 1.9.6;
Revert previous.

Remove a nasty hack that slipped in during the ACPICA update that should
never have made it in-tree. How ACPI has ever worked since 4.99.42 is
beyond me.

branches: 1.7.10;
Merge jmcneill-pm branch.

branches: 1.6.48; 1.6.50; 1.6.60; 1.6.62;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

branches: 1.4.16;
- leave a compiler which register is used for an asm argument.
- use correct asm constraints.
- eliminate usage of dummy variables.

use correct asm operand indexes.
(previously 'GLptr' was used as mask.)
this long standing bug seems to be uncovered by
my previous change(rev.1.2) on some machines.

PR/22457 from Matthias Scheler, and tested by him.

in ACPI_ACQUIRE_GLOBAL_LOCK,
don't assume that the reserved bits of the global lock are all zero.
it's actually needed for, at least, IBM Thinkpad X21 (2662-64J).

branches: 1.1.2;
Add a new include file with some ACPI MD macros, to move i386 specific
stuff out of acnetbsd.h

Redirect to x86/.

Add various external declarations to accomodate ACPI MP probing as an
alternate method to MPBIOS probing. Move some stuff common to the two
methods into mpconfig.h

branches: 1.5.2;
- Disable Interrput before execute AcpiEnterSleepState().
- Add acpi_md_OsDisableInterrupt() for this.

add MD support for ACPI sleep/wakeup.

Update for acpica-unix-20020612. From Takayoshi Kochi.

branches: 1.2.2; 1.2.4; 1.2.10; 1.2.18;
Bah, fix typo that crept in (tank you vi(1)).

Machine-dependent ACPI CA Osd routines for i386.

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: 1.27.18;
Make clock_t unsigned int everywhere.
Ok: matt@, mrg@

On i386, prefer __WCHAR/WINT_TYPE__ where available instead of hardcoded
_BSD_WCHAR_T_ value.

This mimics some other ports, and more importantly fixes compilation with
i386 compilers which define __WCHAR_TYPE__ as "long int" instead of the
"int" we had in there. That superficial mismatch resulted in errors
such as:

lib/libc/gen/vis.c:109:1: error: array of inappropriate type initialized from string constant
static const wchar_t char_shell[] = L"'`\";&<>()|{}]\\$!^~";

No change to NetBSD (our gcc does define __WCHAR_TYPE__, but it is
"int" ... as expected ... since the NetBSD build worked ;)

branches: 1.25.12; 1.25.28; 1.25.30;
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: 1.23.2; 1.23.4; 1.23.6;
merge christos-time_t

branches: 1.22.2;
- use _I386_FOO_H for multi-include protection
- use <i386/foo.h> in a couple of places

branches: 1.21.16; 1.21.18; 1.21.22; 1.21.28;
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: 1.19.8; 1.19.16; 1.19.22; 1.19.26; 1.19.28;
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: 1.18.20; 1.18.22;
merge ktrace-lwp.

branches: 1.17.16;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

branches: 1.16.2;
add some ISO C 1995 I18N functions and types:
btowc, wctrans, towctrans, wcscoll, wcsxfrm, wctype_t and wctrans_t.

branches: 1.15.2;
replace 'long long' with int64_t to compile stand alone program with
compiler other than GCC.

make mbstate_t bigger (32 -> 128 bytes).
XXX if you have libc after citrus locale import, please recompile libc,
and your applications that use mbstate_t (rather rare). really sorry
for the mess.

populate _BSD_MBSTATE_T_. add warning regarding to rune_t.

G/c _BSD_INTPTR_T_ and _BSD_UINTPTR_T_.

branches: 1.11.2;
Use __GNUC_PREREQ__().

Make varargs and stdarg work with GCC 2.96 and later.

branches: 1.9.14;
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.

new way of naming things

branches: 1.3.2;
Cleanup and garbage collection; nothing significant. From magnum branch.

branches: 1.2.4;
add rcsids to everything and clean up headers

branches: 1.1.1;
Initial revision

Redirect some includes to x86/foo.h

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

branches: 1.6.42;
new RCS ID format.

Fix spelling error in Copyright notice

Put definition of __LDPGSZ and `struct relocation_info' where they belong:
in <machine/exec.h>.

branches: 1.3.4;
convert magic numbers to network byte order, and attendent changes

add prototype for a function to be called from execve to check a_mid type

machine-dependent exec stuff

Redirect some includes to x86/foo.h

Add various external declarations to accomodate ACPI MP probing as an
alternate method to MPBIOS probing. Move some stuff common to the two
methods into mpconfig.h

branches: 1.2.2;
Merge Bill Sommerfeld's i386 MP branch. This code has some known
caveats, but works quite well in a lot of MP cases, and all
UP cases that I have tested. Parts of this will hopefully be
reworked in the not-too-distant future.

branches: 1.1.2; 1.1.4;
file apicvar.h was initially added on branch sommerfeld_i386mp_1.

Remove some definitions that were part of the APM bos interface.

branches: 1.25.34; 1.25.44;
Remove clause 3 and 4 from TNF licenses

branches: 1.24.58; 1.24.60; 1.24.62;
remove functions we don't use
and adjust to the new prototype.

branches: 1.23.4; 1.23.8; 1.23.16;
merge ktrace-lwp.

branches: 1.22.2;
kill the "busname" attach arg for acpi, apm, pnpbios and vesabios,
and pass NULL "print" function pointers to their config_found functions
because they shouldn't be called anyway

inspired by the last commit -- apm_attach_args aren't necessary at all,
kill them
being here fix cast-qual problems in debug code

PR/30387: Nicolas Joly: -current i386 GENERIC_LAPTOP kernel compilation failure

Wrap some areas with #ifndef _LOCORE so assembly files can pick up some defs
from here. Needed for bioscall fixes in PR#14946

Nuke __P().

branches: 1.17.2;
Use PAGE_SIZE rather than NBPG.

Moved MI APM definitions into dev/apm.

Merge Bill Sommerfeld's i386 MP branch. This code has some known
caveats, but works quite well in a lot of MP cases, and all
UP cases that I have tested. Parts of this will hopefully be
reworked in the not-too-distant future.

Make it possible to query each battery individually by making the
APM_IOC_GETPOWER ioctl read/write. Setting the batteryid in the passed
structure returns the data for just that battery. The old ioctl
remains for binary compatibility but has been renamed.

Itojun already did the hard work -- I just added a couple of lines.

reviewed by: thorpej

branches: 1.13.2;
support multiple batteries (currently only # of batteris is visible -
need to tweak ioctl API more). PR 10545.

branches: 1.12.2;
remove needless externs in front of function prototypes

Some bios's when apm is disabled [or even some functions of it are disabled],
they keep giving error 0x30b. Unfortunately this keeps happening every second
making the console unusable. Keep track of the last error that occurred and
if the last 10 times apm was called the same error was returned, give up and
exit the apm thread.

branches: 1.10.2;
Enable the APM_IOC_DEV_CTL ioctl. Works at least for turning off & on
a LCD screen on a Dell Inspiron 5000e (and probably many others).

branches: 1.9.2; 1.9.10;
add some v1.2 bits, comment out the APM_IOC_DEV_CTL ioctl which I didn't
find a use for

copyright has been assigned to TNF, update notice

add 32-bit register support and beginnings of APM V1.2 support

put in place a proper bioscall.h (sorry about that!)
finish up incomplete job of moving structure used by bioscall() to
<machine/bioscall.h>, with associated changes in include file strategy,
genassym stuff, etc.

branches: 1.5.10;
add pre-probe step so that autoconfiguration does not print 'apm0 at
mainbus0 not configured' message if configured but not present in the
BIOS

clean up missing prototype, extra variable

change APM to use new almost-generalized BIOS trampoline:

/*
* void bioscall(int function, struct apmregs *regs):
* call the BIOS interrupt "function" from real mode with
* registers as specified in "regs"
* (for the flags, though, only these flags are passed to the BIOS;
* the remainder come from the flags register at the time of the call:
* (PSL_C|PSL_PF|PSL_AF|PSL_Z|PSL_N|PSL_D|PSL_V)
*
* Fills in *regs with registers as returned by BIOS.
*/

Thanks to Charles Hannum for complaining and inspiring me to hack this
together.

make all constants use APM_ prefix, and some other minor cleanup so that
this can be the sole APM include file

add Advanced Power Management driver
Includes bootstrap support from FreeBSD (Tatsumi HOSOKAWA and <ukai>)

i386/asm.h: Missed a spot in previous concatenated-.asciz change.

PR toolchain/58960: Missing support for _NETBSD_REVISIONID on various
ports

x86 machine/asm.h: Avoid juxtaposition for concatenation.

clang asm doesn't seem to like it. Instead of `.asciz "foo" "bar"',
do `.ascii "foo"; .asciz "bar"'.

PR toolchain/58960: Missing support for _NETBSD_REVISIONID on various
ports

branches: 1.45.2;
i386/asm.h: Respect _NETBSD_REVISIONID.

Merge the bouyer-xenpvh branch, bringing in Xen PV drivers support under HVM
guests in GENERIC.
Xen support can be disabled at runtime with
boot -c
disable hypervisor

Mark the .ident section as mergable string section to avoid redundant
entries.

branches: 1.42.18; 1.42.28;
define ALTENTRY(), needed by dtrace.

branches: 1.41.6;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

branches: 1.40.2; 1.40.12; 1.40.16;
Use minimal alignment for functions in standalone code.

branches: 1.39.6;
Consistently use .gnu.warning with .pushsectio and .popsection on all
architectures instead of obsolete STABS frames for linker warnings.

branches: 1.38.14; 1.38.22;
add macros to designate the end of asm functions. ok by Andrew Doran.

branches: 1.37.6; 1.37.8; 1.37.10;
- Make __cpu_simple_lock and similar real functions and patch at runtime.
- Remove old x86 atomic ops.
- Drop text alignment back to 16 on i386 (really, this time).
- Minor cleanup.

restore section after RCSID.

branches: 1.35.2; 1.35.4; 1.35.6;
Drop _ALIGN_TEXT back to 16. 32 was a bit silly.

branches: 1.34.2;
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.

branches: 1.33.2; 1.33.6;
Keep alignment small for _STANDALONE.

- Align assembly routines on 32-byte boundaries.
- Don't bother doing anything special for CPUVAR() when !MULTIPROCESSOR.

branches: 1.31.6; 1.31.14; 1.31.16; 1.31.18; 1.31.22;
Merge newlock2 to head.

branches: 1.30.18;
Add a STRONG_ALIAS macro

branches: 1.29.2;
merge ktrace-lwp.

branches: 1.28.12;
fix a compile error in the case DDB && !GPROF.
the problem pointed by Jaka Jejcic on current-users@ and
by several others privately.

call mcount in Xspllower.

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

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

branches: 1.25.2;
set symbol to be a function using .type directive in IDTVEC macro
so that ddb backtrace can pick them up after recent ksyms changes.

suggested by Matt Thomas on tech-kern.
ok'ed by Frank van der Linden.

Make CVAR asm reference macro CVAROFF, taking an offset.

Redirect some includes to x86/foo.h

New interrupt code. The basic idea behind it is to hide the differences
in interrupt controllers in struct pic, and try to keep as much
common code as possible. At the lowest (asm) level, this is done
with CPP macros.

The main structure is now struct intrsource, describing an established
interrupt line, of any kind (soft/hard local apic/legacy apic/IO apic).
For quick masking, there may be a maximum of 32 sources per CPU.
Sources can be assigned to any CPU in the MP case, though currently they
all go to the boot CPU.

branches: 1.21.2;
Move the IDTVEC() macro to <machine/asm.h>, and make it work with
an ISO C preprocessor.

branches: 1.20.10;
for ELF, put RCSID string into .ident section,
add __KERNEL_RCSID macro which is undefined in case of NO_KERNEL_RCSIDS

branches: 1.19.4; 1.19.6;
Remove ALTENTRY(). It's dangerous and should not be used.

Add a WEAK_ALIAS() macro.

branches: 1.17.6;
charles was on drugs. There's no such thing as #elifdef.

branches: 1.16.2;
Fix WARN_REFERENCES() here for the ELF case.

branches: 1.15.2; 1.15.4; 1.15.6;
For ELF, rename the profiling entry from mcount to __mcount to avoid clashing
with the user's namespace, also within file scope; for binary compatibility,
define a weak alias for the previous name to cover our tracks.

Unlike in an i386 a.out assembler, where in an .align n directive n is meant
to be the logarithm to base 2 of the alignment, in an ELF environment n is
the actual alignment boundary; thus, adjust the directives accordingly.

Albeit the wonderful i386 architecture doesn't mind the smaller alignment in
an obvious way, it is likely to have resulted in some performance penalty
during the a.out->ELF transition.

C_LABEL has no _ if __ELF__

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

Implement WARN_REFERENCES().

Define the ALTENTRY() macro here.

Change asm.h to make it usable for kernel profiling as well.
Make mcount() a prototype in profile.h

PROF -> GPROF

new RCS ID format.

Misc changes to make this file more like the asm.h headers used by other
architectures:
Renamed _C_FUNC() to _C_LABEL()
Renamed _ASM_FUNC() to _ASM_LABEL()
Merged _BEGIN_ENTRY with _ENTRY
Renamed _END_ENTRY to _PROF_PROLOGUE

When assembling with profiling enabled, set up stack frame before calling
mcount() in _PROF_PROLOGUE. Also omit emitting .long 0's, as they are no
longer used by the profiling code.

branches: 1.5.2;
Added RCSID macro, for RCS ID's (what else?).

branches: 1.4.2;
Add .type directive to ENRTY().
Move PIC_ macros over here from SYS.h

Cleanup and garbage collection; nothing significant. From magnum branch.

branches: 1.2.2;
STDC -> __STDC__

Move asm.h from /usr/include/sys to /usr/include/machine.

- Make __cpu_simple_lock and similar real functions and patch at runtime.
- Remove old x86 atomic ops.
- Drop text alignment back to 16 on i386 (really, this time).
- Minor cleanup.

branches: 1.13.2; 1.13.4; 1.13.8;
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.

Make the atomics inline unless !__GNUC__.

Make build in userspace again.

x86 changes for pcc and LKMs.

- Replace most inline assembly with proper functions. As a side effect
this reduces the size of amd64 GENERIC by about 120kB, and i386 by a
smaller amount. Nearly all of the inlines did something slow, or something
that does not need to be fast.
- Make curcpu() and curlwp functions proper, unless __GNUC__ && _KERNEL.
In that case make them inlines. Makes curlwp LKM and preemption safe.
- Make bus_space and bus_dma more LKM friendly.
- Share a few more files between the ports.
- Other minor changes.

branches: 1.9.2; 1.9.4; 1.9.12; 1.9.14; 1.9.16;
KNF, properly protect.

branches: 1.8.2; 1.8.6; 1.8.8; 1.8.10;
Merge newlock2 to head.

branches: 1.7.20;
inline -> __inline

u_intN_t -> uintN_t

__asm__ -> __asm
__const__ -> const
__inline__ -> inline
__volatile__ -> volatile

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

branches: 1.3.18;
Redirect some includes to x86/foo.h

branches: 1.2.2;
Merge Bill Sommerfeld's i386 MP branch. This code has some known
caveats, but works quite well in a lot of MP cases, and all
UP cases that I have tested. Parts of this will hopefully be
reworked in the not-too-distant future.

branches: 1.1.2; 1.1.4;
file atomic.h was initially added on branch sommerfeld_i386mp_1.

Define some optional routines that will help device_register() to
register ISA & PCI devices. Add stub implementations of the routines.

Revert yesterday's change that attempted to fix the detection of the
boot device when using a Multiboot boot loader. It couldn't work because
these boot loaders do not pass a checksum of the disk so matchbiosdisk()
cannot really find any matches. I should have gone to sleep before
commiting...

Found by xtraeme@.

branches: 1.1.2;
When booting an i386 kernel with Multiboot, properly detect the boot device
by looking it up in the x86_alldisks table (instead of trying to match it
to 'wd*' manually).

In order to do this, move the cpu_rootconf function from x86 common code
to amd64 and i386 specific one. This way, i386 can do an extra step (call
the appropriate Multiboot code) in the appropriate place (after
x86_matchbiosdisks and before findroot()).

Redirect some includes to x86/foo.h

branches: 1.1.2; 1.1.10;
Basic interface to BIOS32. Separated from UCHIYAMA Yasushi's PCI BIOS
patches and cleaned up a bit.

Remove clause 3 and 4 from TNF licenses

branches: 1.10.74; 1.10.76; 1.10.78;
merge ktrace-lwp.

Nuke __P().

branches: 1.8.2;
Use PAGE_SIZE rather than NBPG.

branches: 1.7.2;
Add support for getting %es value from the bios call.

branches: 1.6.4;
Clean up bios_reg a little, and add support for accessing
the byte variants of the registers (e.g. %ah, %al, etc.).

branches: 1.5.12;
copyright has been assigned to TNF, update notice

add prototype for bioscall()

add 32-bit register support to BIOSCALL interface

branches: 1.2.2;
put in place a proper bioscall.h (sorry about that!)
finish up incomplete job of moving structure used by bioscall() to
<machine/bioscall.h>, with associated changes in include file strategy,
genassym stuff, etc.

Someone [who will remain nameless] forgot this...

Redirect some includes to x86/foo.h

For x86_64, split the bootinfo memory entry words to avoid growth of the
structure due to alignment.

The correct way to decorate objects with attributes is to use __attribute__
instead of the synonyms understood by gcc.

Make biosgeom struct packed, so that it works out on x86_64.

Think before committing.. previous wasn't actually needed, the values are
guaranteed to fit in 32 bits when loading the kernel into physmem,
and it avoids bootloader incompatibility.

Use long for ssym and esym in btinfo_symtab, so that it works out for
both i386 and x86_64.

branches: 1.8.4; 1.8.6;
Actually define the ACPI memory map entry (bi_memmap_entry).

branches: 1.7.8; 1.7.18;
Clean up the BIOS disk matching code a bit (better naming, one structure
and sysctl to export to userland). Also, only use total number of sectors
given in the extended parameters if the physical chs geometry is
marked invalid. Hopefully fixes a problem where BIOSs would not correctly
fill in this field.

Create a list of native disks too, and make it retrievable. It contains
all matching BIOS disks per entry, so that we have complete match info.
Enable the matching code.

add a definition to pass the "memory map", ie the outcome of INT15/0xe820,
to the kernel

Add some fields to the already defined, but unused, bootinfo structure
for BIOS geometry. Define CPU_BIOS_GEOM sysctl value in cpu.h.

Add btinfo_symtab, to pass symbol table information.
Actually the current ddb_init interface sucks, since there is no
magic number for a.out and it applies heuristics. It would be nice
if the boot blocks passed more info.

Use the MI <sys/disklabel_mbr.h>, not our own machine-dependent
definitions.

branches: 1.1.2;
Data structures passed from the boot loader to the kernel.

new RCS ID format.

branches: 1.1.2;
LBL "/dev/audio" include file.
probably will need to be hacked if "the right things" are done to bsd_audio.c

- use _I386_FOO_H for multi-include protection
- use <i386/foo.h> in a couple of places

branches: 1.3.72; 1.3.76; 1.3.82;
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: 1.2.54; 1.2.66;
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.

On i386, good-bye <machine/bus.h>.

branches: 1.41.122;
Redirect some includes to x86/foo.h

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

Merge Bill Sommerfeld's i386 MP branch. This code has some known
caveats, but works quite well in a lot of MP cases, and all
UP cases that I have tested. Parts of this will hopefully be
reworked in the not-too-distant future.

trivially rename some macro parameters to avoid lint warnings.

branches: 1.37.2;
fix typo

branches: 1.36.2;
Implement bus_space_mmap().

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: 1.34.2;
remove some lint, including ansifying some inlines

Move _i386_memio_unmap() into bus_machdep.c; the ACPI code wants it.

Fix bus_space_write_multi_* in the memory case; the asm constraints
were wrong.

Add the BUS_DMA_STREAMING flag.

branches: 1.30.2; 1.30.4;
Define bus_space_*_stream_N functions as their non-stream counterparts.

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: 1.28.6;
implement bus_space_vaddr()

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

Make the inline asm conform to what gcc thinks they should look like (per
discussions in http://gcc.gnu.org/ml/gcc-patches/1998-11/msg00004.html)

Approved by fvdl.

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

branches: 1.24.2;
nuke current definitions provided by __BUS_SPACE_COMPAT_OLDDEFS.
I'll do what I can to make new ones soon. 8-)

branches: 1.23.4;
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)

Add a private bounce threshold to the DMA map, initialized in a bus-dependent
fashion.

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.

vm_offset_t -> {vaddr_t,paddr_t}, vm_size_t -> vsize_t

Don't enable BUS_SPACE_DEBUG automatically if DEBUG is defined.

Add debugging support to the bus_space macros. If BUS_SPACE_DEBUG (or DEBUG)
is defined, the bus_space macros will check to ensure that the bus address
and the target buffer (if applicable) are aligned properly for the size
of the type being used. If they are not, a message will be displayed on
the console.

While strict alignment is not strictly necessary on the x86, ensuring
proper alignment can aid performance, and help make drivers more portable
to architectures (like the Alpha and StrongARM) which _do_ require strict
alignment.

Add a `bounce threshold' to the i386 DMA tag.

Garbage-collect the DMA tag's "_cookie" member; it's not used for anything.

Add offset and length parameters to bus_dmamap_sync(), used for specifiying
partial syncs of a DMA mapping.

Change the last argument of bus_dmamap_sync() from bus_dmasync_op_t to int,
and allow more than one synchronization operation to be specified in
a single call. Dissallow mixing of PRE and POST operations.

Add dm_mapsize to bus_dmamap_t and rename BUS_DMAMEM_NOSYNC to
BUS_DMA_COHERENT.

Provide workaround (by Charles Hannum) for error in register allocation that
could occur in bus_space_write_multi*

Sync with bus_space(9):
* make map and alloc take 'flags' rather than 'cacheable,' for
more flexibility.
* rename BUS_BARRIER_* to BUS_SPACE_BARRIER_*, for consistency.
* rename bus_space_copy_* to bus_space_copy_region_* and make their
defns match the updated spec.
Backward compatibility is provided by defining __BUS_SPACE_COMPAT_OLDDEFS,
which is currently defined by default.

fix spelling error, pr-3974 from Dave Huang

branches: 1.9.2;
rename i386 bus_space_{map,unmap,subregion,alloc,free} implementation
functions (which only work on memory and i/o space) to i386_memio_*,
and make bus_space_* in bus.h be #defines which invoke them. This makes
life easier for people who need to define the all of the bus_space functions
so that they work on spaces other than memory and I/O space. Also, add
an _i386_memio_map function which is like i386_memio_map but doesn't do
the extent map checking or allocation. _i386_memio_map and i386_memio_*
are for use only by machine-dependent code.

Pull thorpej-bus-dma branch into mainline.

branches: 1.7.8;
Oops, bus_space_set_{multi,region}_N() is supposed to have an `offset'
argument. Add one to the `prototype' in the comment which preceeds
`not implemented' :-)

Two things pointed out by Chris Demetriou <cgd@cs.cmu.edu>:
- The boundary argument to bus_space_alloc() should be a bus_size_t, not
a bus_addr_t.
- The buffer arguments in the "multiple write" methods should have
const qualifiers.

And one from me:
- Make bus_space_barrier() eat up the arguments passed to it so that
the compiler doesn't needlessly whine.

New bus.h implementation/interface:
- No more distinction between i/o-mapped and memory-mapped
devices. It's all "bus space" now, and space tags
differentiate the space with finer grain than the
bus chipset tag.
- Add memory barrier methods.
- Implement space alloc/free methods.
- Implement region read/write methods (like memcpy to/from
bus space).
This interface provides a better abstraction for dealing with
machine-independent chipset drivers.

New implementation of bus_io_{,un}map() for the i386. Details:

- A fixed extent map (statically allocated descriptor storage) is
created in init386(), just before the call to consinit(). The
fixed descriptor storage has enough room for 8 region entires,
which is plenty for early initialization, but doesn't chew up
that much memory.

This extent map (ioport_ex) manages the i386 i/o port
space (0x0 - 0xffff).

- Just before the call to configure() in cpu_startup(), a
flag is set which notifies the bus_io functions that it is
safe to use malloc() to allocate descriptor storage, in the
event that more than 8 regions are needed.

- bus_io_map() attempts to allocate the specified region from
ioport_ex. If the allocation succeeds, the io handle is
filled in. If the allocation fails, it is implied that
something else is already using that io space, and an
error condition is returned.

- bus_io_unmap() frees a region previously allocated from
ioport_ex in bus_io_map(). If the free fails, a warning
is printed on the conole.

These changes implement "port accounting". This is required for
proper autoconfiguration on the i386 port, and makes dealing with,
among other things, PCMCIA io mappings _much_ easier.

Avoid unused variable warnings, by using the first argument to the bus
functions.

Add bus_io_{read,write}_multi_{1,2,4,8}() to the <machine/bus.h>
interface, and implement them (except for the 8-byte versions) on
the i386.

bus memory and I/O space access functions/macros, to be used by
machine-independent code for more sane access to bus resources.
New functions will be added to this set, in the future, as appropriate,
but this is a good starting set. Defines:
bus_{io,mem}_{map,unmap}
bus_{io,mem}_{read,write}_{1,2,4,8}
functions, and several types to go with them.

branches: 1.1.2;
Per discussion at
<http://mail-index.netbsd.org/tech-kern/2010/04/02/msg007941.html>,
divide each machine's bus.h into bus_defs.h (constants & data types)
and bus_funcs.h (macro implementations of bus_space(9) routines and MD
prototypes).

Note that some bus_space(9) routines' implementation will move to .c
files from inline subroutines or macros in .h files.

I've only made the split for machine architectures where there is PCI.
All of the non-PCI-having architectures will require a similar split.

These #include files are not referenced by any (committed) Makefiles or
header files, yet. Changes to Makefiles, to <sys/bus.h>, and to some
more machine-dependent files will dribble in before I throw the switch.

branches: 1.1.2;
Per discussion at
<http://mail-index.netbsd.org/tech-kern/2010/04/02/msg007941.html>,
divide each machine's bus.h into bus_defs.h (constants & data types)
and bus_funcs.h (macro implementations of bus_space(9) routines and MD
prototypes).

Note that some bus_space(9) routines' implementation will move to .c
files from inline subroutines or macros in .h files.

I've only made the split for machine architectures where there is PCI.
All of the non-PCI-having architectures will require a similar split.

These #include files are not referenced by any (committed) Makefiles or
header files, yet. Changes to Makefiles, to <sys/bus.h>, and to some
more machine-dependent files will dribble in before I throw the switch.

merge ktrace-lwp.

branches: 1.1.2; 1.1.4; 1.1.12;
add files which i forgot to add with arch/x86/x86/bus_dma.c rev.1.21.

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: 1.17.28;
Clean up _LKM --> _MODULE leftovers.

Note that _KERNEL is always defined for modules.

Trailing whitespace

Remove clause 3 and 4 from TNF licenses

branches: 1.14.14; 1.14.16; 1.14.18;
- Remove I486_CPU, I586_CPU, I686_CPU options. They buy us nothing and
clutter the code significantly.
- Remove pccons.

branches: 1.13.2;
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.

branches: 1.12.2;
x86 changes for pcc and LKMs.

- Replace most inline assembly with proper functions. As a side effect
this reduces the size of amd64 GENERIC by about 120kB, and i386 by a
smaller amount. Nearly all of the inlines did something slow, or something
that does not need to be fast.
- Make curcpu() and curlwp functions proper, unless __GNUC__ && _KERNEL.
In that case make them inlines. Makes curlwp LKM and preemption safe.
- Make bus_space and bus_dma more LKM friendly.
- Share a few more files between the ports.
- Other minor changes.

branches: 1.11.6; 1.11.14; 1.11.22; 1.11.24; 1.11.26;
Remove duplicate #includes, patch contributed in private mail
by Slava Semushin <slava.semushin@gmail.com>.

To verify that no nasty side effects of duplicate includes (or their
removal) have an effect here, I've compiled an i386/ALL kernel with
and without the patch, and the only difference in the resulting .o
files was in shifted line numbers in some assert() calls.
The comparison of the .o files was based on the output of "objdump -D".

Thanks to martin@ for the input on testing.

branches: 1.10.18;
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

u_intN_t -> uintN_t

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

branches: 1.6.2; 1.6.34;
minor knf

explicitly pull in sys/types.h

replace __byte_swap_long_variable and __byte_swap_word_variable
#define ({ }) with static __inline { }

branches: 1.3.4; 1.3.8;
use _KERNEL_OPT

branches: 1.2.8;
This code has nothing to do with UCB.

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.

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: 1.8.2; 1.8.6;
Add an optional MD calling convention flag for use in libsa when space
optimisation is critical. Use this on i386 to switch to register passing
calling convention for the file system entry points and most assembler
call backs that have to preserve at least 3 registers.

branches: 1.7.8; 1.7.26;
- use _I386_FOO_H for multi-include protection
- use <i386/foo.h> in a couple of places

branches: 1.6.146; 1.6.150; 1.6.156;
Garbage-collect.

Add ELF crap.

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".

branches: 1.2.4; 1.2.10;
convert to timecounters (from branch simonb-timecounters)

branches: 1.1.2; 1.1.4; 1.1.6; 1.1.12;
Prototypes for i386-related clock functions.

Remove clause 3 and 4 from TNF licenses

branches: 1.1.4; 1.1.6; 1.1.8; 1.1.134; 1.1.136; 1.1.138;
Move a bunch of the COFF definitions into exec_coff.h, so they can be used by
other code. XXX Not tested on SH3 yet.

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: 1.10.2; 1.10.4;
Remove opms(4) and its device, /dev/pms0, from the i386 port, because
it has been obsoleted by pms(4).

Reviewed by fvdl and christos.

Use "#define<tab>".

- define other DEV_ constants that the local port uses.
- delete cdev_decl(mm) since <sys/conf.h> does it.

branches: 1.6.4;
now that duplicated stuff has been moved to sys/conf.h, remove unnecessary
defs for: lpt, joy, pc

branches: 1.5.12; 1.5.26;
Assign copyright to TNF.

remove unneeded stuff

Implement poll(2).

Add the joystick

Fwd declarations for MD drivers.

x86: avoid annoying GCC 12 bounds check in curcpu() and curlwp().

these functions read %gs and return an pointer at an offset from this
value (the current cpu, or lwp pointers), and GCC is complaining that
they're accessing a array cpu_info[0] (ie, zero length, no storage.)

several attempts to workaround it have failed, and because of the
asm volatile nature of this, it seems very unlikely a compiler would
take this and do something wrong with it.

i386: Make curlwp and curcpu() flushable.

The only effect of the `volatile' qualifier on an asm block with
outputs is to force the instructions to appear in the generated code,
even if the outputs end up being unused. Since these instructions
have no (architectural) side effects -- provided %fs is set
correctly, which must be the case here -- there's no need for the
volatile qualifier, so nix it.

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.

mi_userret(): take care of calling preempt(), set spc_curpriority directly,
and remove MD code that does the same.

We reorganise definitions for XEN source support as follows:

XEN - common sources required for baseline XEN support.
XENPV - sources required for support of XEN in PV mode.
XENPVHVM - sources required for support for XEN in HVM mode.
XENPVH - sources required for support for XEN in PVH mode.

On Xen, copy just the bits we need from the trapframe for hardclock(9)
and statclock(9).

Current, the macros that use the trapframe are:
CLKF_USERMODE()
CLKF_PC()
CLKF_INTR()

Of these, CLKF_INTR() already ignores the frame and uses the ci_idepth
variable to do its job.

Convert the two remaining ones to do this, but only for XEN.

branches: 1.179.2; 1.179.4;
Remove the second argument from USERMODE and KERNELMODE, it is unused
now that we don't have vm86 anymore.

branches: 1.178.6;
Move the per-cpu l3 page allocation code to a separate MD function. Avoids code duplication for xen PAE

branches: 1.177.2; 1.177.6;
whitespace

branches: 1.176.2; 1.176.12;
_LKM -> _MODULE

branches: 1.175.6;
Mark x86_curlwp() with __attribute__ ((const)), so gcc can CSE it and know
that it does not clobber global data.

Wrap stuff in #ifdef _KERNEL

Share cpu.h between the x86 ports.

Simplify x86 identcpu code, and share between i386/amd64.

Improve x86 tsc handling:

- Ditch the cross-CPU calibration stuff. It didn't work properly, and it's
near impossible to synchronize the CPUs in a running system, because bus
traffic will interfere with any calibration attempt, messing up the
timings.

- Only enable the TSC on CPUs where we are sure it does not drift. If we are
On a known good CPU, give the TSC high timecounter quality, making it the
default.

- When booting CPUs, detect TSC skew and account for it. Most Intel MP
systems have synchronized counters, but that need not be true if the
system has a complicated bus structure. As far as I know, AMD systems
do not have synchronized TSCs and so we need to handle skew.

- While an AP is waiting to be set running, try and make the TSC drift by
entering a reduced power state. If we detect drift, ensure that the TSC
does not get a high timecounter quality. This should not happen and is
only for safety.

- Make cpu_counter() stuff LKM safe.

Make cpu_idle a macro calling a function pointer on x86.
Select the Xen idle routine for Xen, mwait if supported by the CPU and
it is not AMD and halt otherwise. As reported by Christoph Egger,
AMD Barcelona keeps the CPU in C0 state with MWAIT, contrary to HLT,
which uses C1 and therefore much less power.

branches: 1.169.2;
Avoid unneeded AST faults.

Add support for kernel preeemption to the i386 and amd64 ports. Notes:

- I have seen one isolated panic in the x86 pmap, but otherwise i386
seems stable with preemption enabled.

- amd64 is missing the FPU handling changes and it's not yet safe to
enable it there.

- The usual level for kern.sched.kpreempt_pri will be 128 once enabled
by default. For testing, setting it to 0 helps to shake out bugs.

branches: 1.167.2;
- Give ci_want_resched a single cache line, and align. This is for monitor/
mwait. At least one errata sheet from Intel notes that a single line
should be used.
- Align cc_microtime.

Access Xen's vcpu info structure per-CPU.
Tested on i386 and amd64 (both dom0 and domU) by me.
Xen2 tested (both dom0 and domU) by bouyer.
OK bouyer

branches: 1.165.2;
Add back the CPU_TMLR_* definitions for binary sysctl compatibility
with NetBSD pre-2.0, and use them in the longrun driver again.

Requested by cube@.

Remove CTL_MACHDEP_NAMES, it's not used anywhere.

Ok by martin@.

- Fixup the machdep.tm_longrun_* sysctl nodes creation.
- The CTL_TMLR_ static definitions for CTL_MACHDEP are not needed anymore.

Split off the Transmeta Crusoe Longrun code into its own file, that
way identcpu.c and machdep.c are not cluttered with foreign code.

The driver is built by default as before, but the sysctl subtree will
only be created if longrun is detected and not always as the old code
did. This matches what the FreeBSD code does.

Ok by christos@.

branches: 1.161.2; 1.161.6;
Align cc_microtime and struct cpu_info to 64b.

Remove options MATH_EMULATE.

Introduce optional cpu_offline_md to execute MD actions at the end of
cpu_offline. Use this on amd64/i386 to force a FPU save. As this was
triggered by npxsave_cpu/fpusave_cpu not working for a different CPU,
remove the cpu_info argument and adjust npxsave_*/fpusave_* to use bool
for the save.

OK ad@

Merge the bouyer-xeni386 branch to head, at tag bouyer-xeni386-merge1 (the
branch is still active and will see i386PAE support developement).
Sumary of changes:
- switch xeni386 to the x86/x86/pmap.c, and the xen/x86/x86_xpmap.c
pmap bootstrap.
- merge back most of xen/i386/ to i386/i386
- change the build to reduce diffs between i386 and amd64 in file locations
- remove include files that were identical to the i386/amd64 counterparts,
the build will find them via the xen-ma/machine link.

move IOMAP_INVALOFF from cpu.h to tss.h

g/c ci_idle_pcb_paddr

i386:
- make tss per-cpu. this considerably speeds up context switch for,
at least, pentium4, where ltr instruction seems very slow.
i386, xen:
- kill cpu_maxproc.
kvm86:
- adapt to per-cpu tss.
- cleanup and simplify.
- move kvm86_mp_lock to more meaningful place.
- disable preemption during a call.

try to detect processor resource sharing topologies. ie. package/core/smt IDs.

Convert many of the uses of __attribute__ to equivalent
__packed, __unused and __dead macros from cdefs.h

Add new IPI for saving CPU state explicitly, share high-level part of
ACPI wakeup code and teach it how to start the APs again. As a side
effect the CPU_START interface allows choosing between different
bootstrap codes more easily now.

branches: 1.151.4;
Add a CPU local timer based on the LAPIC. This is consistently faster
than TSC, but doesn't suffer from SpeedStep as TSC does.

The default quality is higher than HPET for UP, but -100 for
MULTIPROCESSOR as it needs CPU local state which doesn't exist yet.

branches: 1.150.2; 1.150.4;
Mark cpu_info::ci_tlbstate volatile to ensure that the compiler doesn't
reorder accesses to it. It's updated from the TLB IPI handlers and we don't
block those, so the order in which things are read/updated is important.

Match delay/DELAY on x86 with delay(9). It takes an unsigned int as
argument. Use this and replace the inline assembly (mul + div using the
64bit intermediate result) with normal 32bit multiplication and
division. The compiler can turn the division into a multiplication and
shift, making it even cheaper then the original assembly. For extreme
long delays, just use 64bit arithmetic.

merge yamt-x86pmap branch.

- reduce differences between amd64 and i386. notably, share pmap.c
between them. it makes several i386 pmap improvements available to
amd64, including tlb shootdown reduction and bug fixes from Stephan Uphoff.
- implement deferred pmap switching for amd64.
- remove LARGEPAGES option. always use large pages if available.
also, make it work on amd64.

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.

branches: 1.146.2;
x86 changes for pcc and LKMs.

- Replace most inline assembly with proper functions. As a side effect
this reduces the size of amd64 GENERIC by about 120kB, and i386 by a
smaller amount. Nearly all of the inlines did something slow, or something
that does not need to be fast.
- Make curcpu() and curlwp functions proper, unless __GNUC__ && _KERNEL.
In that case make them inlines. Makes curlwp LKM and preemption safe.
- Make bus_space and bus_dma more LKM friendly.
- Share a few more files between the ports.
- Other minor changes.

ci_astpending is no more.

branches: 1.144.2;
Merge most x86 changes from the vmlocking branch, except the threaded soft
interrupt stuff. This is mostly comprised of changes to the pmap modules to
work on multiprocessor systems without kernel_lock, and changes to speed up
tlb shootdowns.

branches: 1.143.4; 1.143.8; 1.143.10;
Merge some of the less invasive changes from the vmlocking branch:

- kthread, callout, devsw API changes
- select()/poll() improvements
- miscellaneous MT safety improvements

Make the Enhanced Speedstep driver available for i386 and amd64.
To use it on EM64T CPUs supporting the EST CPUID feature. Note that
some CPUs still don't work with this driver, like Xeon or Pentium 4.

Move the p[34]_get_bus_clock functions into its own file,
intel_busclock.c and remove this code from i386/identcpu.c.

Tested on i386 by myself and amd64 by Tonerre.

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: 1.140.2;
Share the sysarch stuff between the x86 ports. PR kern/36046.

- Remove ci_msr_rvalue, it's not useful anymore as yamt@ pointed out.
- Remove completely debug from msr_ipifuncs, now it's known to work.

MSR read and write IPI handlers for x86. A MSR will be read or written
in all CPUs available in the system. This adds another member
to struct cpu_info, ci_msr_rvalue; it will contain the value of the MSR
in a previous operation.

Tested with clockmod in UP and SMP by me, tested with est in SMP
by Daniel Carosone and Michael Van Elst.

Ok'ed by Andrew Doran and Matthew R. Green.

There's no need to run est_init or k8_powernow_init on each CPU.
Just run it once (in the first cpu probed) with the RUN_ONCE(9)
framework.

Change the argument of est_init and k8_powernow_init to void, we don't
need cpu_info * anymore.

Suggested by tls@ and mrg@.

branches: 1.136.2; 1.136.4;
Include sys/simplelock.h, not sys/lock.h.

branches: 1.135.2;
clean up how cpus and ioapics are attached at the mainbus:
Seperate "cpubus" and "ioapicbus" -- while they share a common "address
space" (the apic id), the kernel doesn't use this fact. There are different
data passed to cpus and apics, which caused some ugly polymorphism. This
also saves the special "submatch" functions needed to distingush cpus
and ioapics for autoconf. (And it makes that "apid" locators wired
in the kernel configuration are honored now; this allows one to dumb down
an mp box to singleprocessor by userconfig.)
Print "apid" locators in the buses "print" function "as everyone does",
so the per-port cpu drivers don't need to do it.
Being here, constify "struct cpu_functions" and g/c the unused MP_PICMODE
flag.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.133.2;
Add an opencrypto provider for the AES xcrypt instructions found on VIA
C5P and later cores (also known as 'ACE', which is part of the VIA PadLock
security engine). Ported from OpenBSD.

Reviewed on tech-crypto and port-i386, no objections to commiting this.

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

Merge newlock2 to head.

- pass intrframe by-pointer, not by-value.
- make i386 and xen use per-cpu interrupt stack.

xen part is reviewed by Manuel Bouyer.

branches: 1.129.2; 1.129.4; 1.129.6;
Conditionalize *_get_bus_clock() functions inside of
#ifdef ENHANCED_SPEEDSTEP to fix build when ENHANCED_SPEEDSTEP is not
defined.

Reported by Geoff Wing.

Update the enhanced speedstep driver and sync the code with OpenBSD:

est.c:

* Use a quintuplet (vendor, MHz_hi, mV_hi, MHz_lo, mV_lo } to match
CPUs more correctly than parsing the brand string.
* Add support for a bunch of models.
* Create a fake table on the fly if the CPU is unknown (there's no
table for it) with the current/highest/lowest frequency.

specialreg.h:

* Add some MSRs needed to get the bus clock value.

identcpu.c:

* Add functions specific to Pentium III, Pentium M and Pentium 4 to
get the bus clock value.

Note that the new fake table code from Simon Burge is not included on
this commit.

Ok'ed by simonb and dogcow.

- Move k7_powernow_* prototypes from i386/include/cpu.h to
x86/include/powernow.h
- Protect k[78]_powernow_init() functions with #ifdef POWERNOW_K[78] to
make it build without these options.

This fixes the problem reported by hubertf.

- Add k7_powernow_destroy() prototype into cpu.h.
- Call k7_powernow_destroy() unloading the module.

branches: 1.125.2;
* Sync powernow_k7.c driver with OpenBSD, it seems to work much
better finding PST tables.
* Use functions defined in powernow_common.c to detect if the
CPU can run powernow.
* Update the LKM with current code.

convert to timecounters (from branch simonb-timecounters)

branches: 1.123.2; 1.123.8;
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: 1.122.2;
Fix "hard reboot" problem reported by Rhialto weeks ago on current-users@.
The problem was that pnowk7_init() was called too early in the boot
process, at this point the required calls were not available.

Thanks to Rhialto for testing and cube/christos for comments.

branches: 1.121.2;
AMD PowerNow K7 driver written by Martin Vegiard via PR port-i386/26239.

Enabled by default on GENERIC and GENERIC_LAPTOP.

Imported 1 year later... but it's here finally.

branches: 1.120.2;
u_intN_t -> uintN_t

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

Change all archs that did:

#define clockframe somethingelse

to:

struct clockframe {
struct somethingelse cf_se;
};

and change access macros accordingly.

That means that, at least for that very issue, things will not go
ka-boomy if you don't have the actual definition of struct clockframe
before including systm.h.

branches: 1.117.4;
Probe and print the Intel Extended Feature Bits, as documented
in the CPUID instruction description in the "Intel Extended Memory 64
Technology Software Developer's Guide, Volume 1 of 2" available at
ftp://download.intel.com/technology/64bitextensions/30083402.pdf

This presently consists of the SYSCALL/SYSRET and the EM64T features.
CPUs with the EM64T feature available should be able to run amd64 code.

Reviewed by fvdl

branches: 1.116.4; 1.116.6;
move some per-cpu data definitions to MI place so that they can be modified
without touching all ports. discussed on tech-kern@.

curcpu: fix a typo. (cpuinfo -> cpu_info)
no functional difference.

Integrate support for Enhanced SpeedStep Technology (est) that
Michael Eriksson posted to port-i386 on 20031102, with various
modifications by me to work in the new sysctl(9) framework.

The code is enabled with 'options ENHANCED_SPEEDSTEP', and if
the CPU supports EST the following sysctl(8) nodes appear
(with the values that a Dell Inspiron 8600 + WUXGA with a
1.4GHz Pentium M CPU supports):
machdep.est.cpu_brand = Intel(R) Pentium(R) M processor 1400MHz
machdep.est.frequency.target = 1400
machdep.est.frequency.current = 1400
machdep.est.frequency.available = 1400 1200 1000 800 600

If EST support isn't available, the "machdep.est" sysctl sub-MIB
is not created.

Once we have a more general "CPU frequency" control API we can
migrate this code to using that.

Thanks to Michael Erikkson for providing this code!

defer pmap switching until it's really needed
to avoid frequent loading of cr3 register, which involves tlb flush.

with some fixes/improvements from Stephan Uphoff and Bang Jun-Young.

Process and lwp exit path always executes lwp_exit2() now and cpu_exit()
is empty besides calling switch_exit(). So, rename switch_exit() to
cpu_exit() and modify the routine to call lwp_exit2() direct.
This saves couple cycles on the exit path.

Replace the traditional buffer memory management -- based on fixed per buffer
virtual memory reservation and a private pool of memory pages -- by a scheme
based on memory pools.

This allows better utilization of memory because buffers can now be allocated
with a granularity finer than the system's native page size (useful for
filesystems with e.g. 1k or 2k fragment sizes). It also avoids fragmentation
of virtual to physical memory mappings (due to the former fixed virtual
address reservation) resulting in better utilization of MMU resources on some
platforms. Finally, the scheme is more flexible by allowing run-time decisions
on the amount of memory to be used for buffers.

On the other hand, the effectiveness of the LRU queue for buffer recycling
may be somewhat reduced compared to the traditional method since, due to the
nature of the pool based memory allocation, the actual least recently used
buffer may release its memory to a pool different from the one needed by a
newly allocated buffer. However, this effect will kick in only if the
system is under memory pressure.

g/c unused x86_ipisend.

Nuke __P().

Take previous even further - leave only CTL_MACHDEP and related
definitions and structures outside the #ifdef _KERNEL block.

revert the previous (thanks, lukem)
and wrap curcpu, cpu_info and friends with #ifdef _KERNEL completely.

Userland needs <stddef.h> for offsetof(), not <lib/libkern/libkern.h> ...

(Arguably a chunk more of this file could be protected with _KERNEL.
That's a separate project.)

avoid a magic number in curcpu().

SA_SIGINFO changes.

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

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

branches: 1.102.2;
-make cpu_feature unsigned, just like ci_feature_flags
-clean up duplicate declaration of cpu_info_primary

Use __asm instead of asm, to make lint happy.

Share some common cache info cpuid code between i386 and x86_64.

Add some underscores in curcpu() to avoid a -Wshadow.

Move the CPU identification out of machdep.c into a seperate file.

Redirect some includes to x86/foo.h

Share i386/tsc_microtime.c with alpha and sparc64 as kern_microtime.c.
(approved by martin)

Merge the nathanw_sa branch.

Add various external declarations to accomodate ACPI MP probing as an
alternate method to MPBIOS probing. Move some stuff common to the two
methods into mpconfig.h

use the __HAVE_CPU_MAXPROC hook to limit kern.maxproc to number
of available GDT slots
add code in init386() to force maxproc to be maximum cpu_maxproc()

this fixes port-i386/1635 by John Kohl

Don't pollute struct cpu_info with throwaway variables.

Display the extended feature flags with non-Intel processors rather than
the standard flags. See also PR#19163.

Before:

cpu0: AMD Athlon XP 1800+ (686-class), 1532.11 MHz
cpu0: features 383f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR>
cpu0: features 383f9ff<PGE,MCA,CMOV,FGPAT,PSE36,MMX>
cpu0: features 383f9ff<FXSR,SSE>

After:

cpu0: AMD Athlon XP 1800+ (686-class), 1532.11 MHz
cpu0: features c3cbf9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR>
cpu0: features c3cbf9ff<PGE,MCA,CMOV,PAT,PSE36,MPC,MMXX,MMX>
cpu0: features c3cbf9ff<FXSR,SSE,3DNOW2,3DNOW>

While I'm here, amd_cpuid_cpu_cacheinfo() is an info function rather
than a probe function.

Add ci_apicid field.

New interrupt code. The basic idea behind it is to hide the differences
in interrupt controllers in struct pic, and try to keep as much
common code as possible. At the lowest (asm) level, this is done
with CPP macros.

The main structure is now struct intrsource, describing an established
interrupt line, of any kind (soft/hard local apic/legacy apic/IO apic).
For quick masking, there may be a maximum of 32 sources per CPU.
Sources can be assigned to any CPU in the MP case, though currently they
all go to the boot CPU.

/*CONTCOND*/ a while (0) macro

Remove ci_lapic_ints from struct cpu_info again, it isn't needed anymore.

Keep size of struct cpu_info independent of DIAGNOSTIC/LOCKDEBUG
(was done in rev. 1.81, got lost in the MP merge).

Add per-CPU local apic redir table (2 pointers).

cpu_swapin now exists, so remove the empty define.

Add mask for TLB IPI rendezvous, and stackpointers + TSS structures
for TSS gates per CPU.

XXX struct cpu_info is getting to be a bit large

Merge Bill Sommerfeld's i386 MP branch. This code has some known
caveats, but works quite well in a lot of MP cases, and all
UP cases that I have tested. Parts of this will hopefully be
reworked in the not-too-distant future.

always include ci_s*_locks in struct cpu_info, so that the size doesn't depend
on DIAGNOSTIC/LOCKDEBUG settings

branches: 1.80.2; 1.80.4;
Eliminate commons.

Wire CLKF_BASEPRI() to 0 on this platform. (See tech-kern.)

Fix comments.

add a new function to the cpu struct's that can be called to print extra
cpu information after initialization.

Add transmeta crusoe cpu support from toshi.

- Rename cpu_use_fxsave to i386_use_fxsave.
- If we detect SSE/SSE2 support in the CPU, enable SSE exceptions
and set i386_has_{sse,sse2} as appropriate.
- Expose i386_use_fxsave and i386_has_{sse,sse2} through sysctl
as machdep.{osfsxr,sse,sse2}.

Add support for saving/restoring SSE/SSE2 state using FXSAVE/FXRSTOR.

Reviewed by Frank.

Add several more Intel cache info entries, and fetch the CFLUSH
line size if we have the CFLUSH insn.

branches: 1.72.2;
Don't need to prototype child_return() here, it's in <sys/proc.h>.

use _KERNEL_OPT

Rearrange the cache info fetching code some more, and add support
for fetching cache info for AMD processors.

- Keep cache/tlb info in the cpu_info structure.
- Add "associativity" to the cache_info structure.
- Add a (*cpu_cacheinfo)() function pointer, like we have a
(*cpu_setup)() function pointer. Cache info in the `cpuid'
is vendor-specific.

branches: 1.68.2;
Remove prototype for long-defunct i386_user_cleanup().

Remove duplicate prototype for i386_{set,get}_ldt() from sys_machdep.c.

Change i386_iopl() and i386_{set,get}_{ldt,ioperm}() to take a second
argument of "void *" instead of "char *", for consistency with other syscalls.

Introduce PROC_PC(), which is used to get a process's user PC. If this is
defined, call addupc_intr() directly from statclock() in the system time case,
using the same P_OWEUPC path if the copyin/copyout fails.
Use this in i386 to remove profiling code from the normal userret() path.

make i386_nocpuid_cpus[] and i386_cpuid_cpus[] const - this pushes
another ~1.4KB to text section

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.

branches: 1.64.2;
Implement CLKF_INTR(), to count interrupt time separately.

branches: 1.63.2;
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.

- Declare biosbasemem and biosextmem in <machine/cpu.h>, don't extern
them everywhere they're used.
- Avoid integer overflow when converting bios{base,ext}mem (in units of
kilobytes) to bytes.

Remove redundant decl of consinit() - it's in <sys/systm.h>.
Remove duplicate definition of delay() - we only need one in this file.

Extern cpu_id and cpu_vendor[] here.

branches: 1.59.2;
next step in getting machdep.c maintainable - put bus_space related
stuff into a separate file

machdep.c is becoming an unmaintainable mess
put console initialisation into a separate file

branches: 1.57.2;
- Export initrtclock().
- Call it from apm_resume().

This fixes timer problem on some laptop after hybernation (PR#4808).
Reviewd by: fvdl@netbsd.org

branches: 1.56.2; 1.56.4;
Define CPU_FPU_PRESENT sysctl value.

branches: 1.55.2;
Define cpu_number() as discussed on tech-smp.

Implement cpu_wait(), and move the call to tss_free() from switch_exit()
to cpu_wait(); tss_free() may block, and thus requires a valid context.

branches: 1.53.2; 1.53.4;
Do proc0's TSS and LDT initialization at the end of configure() (i.e.
once the FPU has been attached).

Clean up the BIOS disk matching code a bit (better naming, one structure
and sysctl to export to userland). Also, only use total number of sectors
given in the extended parameters if the physical chs geometry is
marked invalid. Hopefully fixes a problem where BIOSs would not correctly
fill in this field.

Create a list of native disks too, and make it retrievable. It contains
all matching BIOS disks per entry, so that we have complete match info.
Enable the matching code.

Add some fields to the already defined, but unused, bootinfo structure
for BIOS geometry. Define CPU_BIOS_GEOM sysctl value in cpu.h.

Changes to support fork_kthread():
- cpu_set_kpc() now takes void *arg third argument, passed to the
entry point.
- cpu_fork() allows parent to be non-curproc iff parent is proc0.
When forking non-curproc, assume its state has already been saved.
- Adjust various pieces of machine-dependent code to account of all of this.

Erg, frame -> trapframe in last. (thanks to john kohl)

Oops, back out a buglet I didn't intend to commit in the last change.

Move the code that does the deferred (post-autoconfiguration) buffer
cache allocation to its own function, and call it at the end of configure().

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

Generate dependencies on the USER_LDT option.

Generate dependencies on the MATH_EMULATE option.

Generate dependencies on the VM86 option.

Add a cpu_setup() function to "struct cpu_nocpuid_nameclass" and
"struct cpu_cpuid_family", so that we can have a cpu_setup function per
known cpu type. For now use it only for cyrix 6x86 to enable suspend-on-halt
and implement cyrix's workaround to the "coma bug".

branches: 1.40.2;
Define "machdep.booted_kernel" for sysctl.

branches: 1.39.8;
Nuke some options GENERIC residue.

Added types/definitions for changed CPU recognition code.

Changes for NKPDE calculation from cgd.

- New variables: biosextmem, biosbasemem, nkpde
- Above can be set by using the options BIOSEXTMEM, BIOSBASEMEM,
and NKPDE respectively (EXTMEM_SIZE is now called BIOSEXTMEM).
When preset this way, they won't be filled in / calculated.
- Readable by sysctl using machdep.nkpde, machdep.biosbasemem
and machdep.biosextmem.
- nkpde is calculated as:

min(NKPDE_MAX, NKPDE_BASE + (biosextmem >> 10) * NKPDE_SCALE)

Where NKPDE_MAX is 31, NKPDE_BASE is 4, NKPDE_SCALE = 1.

printf -> kprintf, sprintf -> ksprintf

Change the prototype of fillw from (int, caddr_t, size_t) to
(short, void *, size_t).

Add prototypes from other files.

Prototype delay().

Enable paging of the user area.

Various changes from John Kohl and me:
Map kernel stacks only at unique addresses.
Use one TSS per process.
Add sysarch calls for modifying IOPL and the I/O permission bitmap.
Add a compacting GDT entry allocator, for TSS and LDT selectors.
Enable modifying %fs and %gs with PT_SETREGS.
Sanitize various bits of code.

Add USERMODE() and KERNELMODE() macros, and use them.

remove unused cpu_exec() definitions. moved "broken swap" markers, for
ports that still need it, to types.h.

define BROKEN_SWAP and/or cpu_swapout as appropriate.

- added sunos_machdep.c for sun3, atari, amiga and mac68k.
- changed machdep.c and trap.c to use struct emul.
- remove ep_setup references.
- added struct emul to all emulations.

Alias delay() to DELAY() for mi code.

KERNEL -> _KERNEL

new RCS ID format.

profile_tick() is no longer needed.

Add cpu_set_init_frame().

add cpu_swapin

make cpu_wait a macro, and define cpu_coredump

cpu-dependent sysctl structs

Correct comment.

lots of changes: prototype migration, move lots of variables, definitions,
and structure elements around. kill some unnecessary type and macro
definitions. standardize clock handling. More changes than you'd want.

Rename a lot of process flags.

Implement dynamic IRQ configuration and IRQ sharing. Inline spl*() calls.
Reorganize and clean up the relevant code.

This is #included multiple times.

Add `com' softintr.

branches: 1.12.2;
From magnum branch:
Remove Jolitz's netisr kluge. Make sure cpl == 0 really means base priority.
Other minor cleanup.

Remove NEED_* defines, as they are now satisfied by libkern.

branches: 1.10.2;
get rid of bogus #define of resettodr(); now setting time actually works!

Move my assembly versions of strlen and ffs into the kernel

add prototype for a function to be called from execve to check a_mid type

set things up so that the signal trampoline code is on the stack,
like it normally is in BSD systems. still has a bit of hair...

add "cpu classes" in addition to cpu names, put cpu names in table, along
with mapping to classes. this is for upgraded cpu-id code coming "soon"

move cpu types out of assym.s and into cputypes.h
and have that file included by cpu.h and by locore.s

hack on the uname "machine name" stuff for hopefully the last time.
now it uses MACHINE, as defined in param.h

clean up for new cpu stuff

make uname stuff in init_main machine independent

branches: 1.1.1;
Initial revision

Merge cpu_counter.h.

branches: 1.8.2;
Remove clause 3 and 4 from TNF licenses

branches: 1.7.14; 1.7.16; 1.7.18;
- Remove I486_CPU, I586_CPU, I686_CPU options. They buy us nothing and
clutter the code significantly.
- Remove pccons.

branches: 1.6.2;
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.

branches: 1.5.8; 1.5.10; 1.5.14;
Move x86 common cpu_counter functions into <x86/cpu_counter.h>.

branches: 1.4.24; 1.4.26; 1.4.32;
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: 1.3.2; 1.3.4; 1.3.6;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

branches: 1.2.2;
document more precisely the Cyrix TSC lossage: if you execute "hlt"
when in powersave mode, the TSC stops counting!

branches: 1.1.2; 1.1.16;
Share i386/tsc_microtime.c with alpha and sparc64 as kern_microtime.c.
(approved by martin)

branches: 1.1.2; 1.1.18;
Add cpu_rng, a framework for simple on-CPU random number generators.

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.

x86 changes for pcc and LKMs.

- Replace most inline assembly with proper functions. As a side effect
this reduces the size of amd64 GENERIC by about 120kB, and i386 by a
smaller amount. Nearly all of the inlines did something slow, or something
that does not need to be fast.
- Make curcpu() and curlwp functions proper, unless __GNUC__ && _KERNEL.
In that case make them inlines. Makes curlwp LKM and preemption safe.
- Make bus_space and bus_dma more LKM friendly.
- Share a few more files between the ports.
- Other minor changes.

branches: 1.38.2; 1.38.10; 1.38.18; 1.38.20; 1.38.22;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.37.2;
Merge newlock2 to head.

.. but only if _KERNEL is defined.

On second thought, implement x86_pause() as a regular function. The small
delay from the call is useful for spinlock backoff.

Report on and where possible, try to work around some of the known errata
for Athlon 64 and Opteron processors. Tested briefly by cube@ and elad@.

branches: 1.33.2;
Add x86_sfence(), x86_mfence().

Change the 'asm' pattern for lidt so that gcc4 knows it references memory
and doesn't optimise out the assignments to the descriptor memory area.
i386 kernels now build with -Os (and -O3) applied to machdep.c

branches: 1.31.4; 1.31.8; 1.31.18;
inline -> __inline

u_intN_t -> uintN_t

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

branches: 1.28.14; 1.28.16;
issue memory read barrier for BUS_DMASYNC_POSTREAD operation.
PR/21665 from Stephan Uphoff.

Nuke __P().

branches: 1.26.2;
make cpu_feature unsigned, just like ci_feature_flags

Move x86_pause() out of ifdef _KERNEL.