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: 1.29.36;
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: 1.28.2; 1.28.4;
Introduce sh3/sysarch.h and add SH3_SYNC_ICACHE

fenv.h for sh

branches: 1.26.12; 1.26.30;
Do not install bus.h.

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.

Merge newlock2 to head.

branches: 1.23.4;
don't install <machine/db_machdep.h>, this is kernel only

Nuke va-sh.h. stdarg.h and varargs.h now use __builtin_va_*.

branches: 1.21.2; 1.21.4; 1.21.8; 1.21.10;
Need to install byte_swap.h and bswap.h needs to include sh3/byte_swap.h.

branches: 1.20.2; 1.20.4;
merge ktrace-lwp.

branches: 1.19.12;
Factor out W{CHAR,INT}_{MAX,MIN} into their own header file.

branches: 1.18.2;
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: 1.15.2; 1.15.6;
clean up disassembler code.

rework general exception, and TLB exception handling for new pmap.
all exception staffs are moved to exception.[ch]

Rework interrupt code.
+ Fully utilize SH SR.I[0:3] interrupt level.
+ software interrupt is emulated by TMU1, 2 one shot interrupt.
+ implement generic soft interrupts.
+ implement clockframe correctly.

Remove some files that no longer exist.

branches: 1.11.2;
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.

branches: 1.8.2;
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 "machineendian_machdep.h".

watchdog timer

Add NAN constant glue for sh3.

add cpgreg.h and pfcreg.h for "make includes"

remove exec_coff.h

branches: 1.1.2;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

merge ktrace-lwp.

branches: 1.2.4;
Use 'CH' for channel select in the ADCSR bits format string for consistency.

Register definitions for sh7709 analog->digital converter.

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: 1.16.18;
Make clock_t unsigned int everywhere.
Ok: matt@, mrg@

branches: 1.15.12; 1.15.28; 1.15.30;
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: 1.13.4; 1.13.6;
merge christos-time_t

branches: 1.12.16; 1.12.18; 1.12.22; 1.12.30;
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: 1.10.8; 1.10.16; 1.10.22; 1.10.26; 1.10.28;
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: 1.9.8; 1.9.10;
Change _BSD_VA_LIST_ from "void *" to "__builtin_va_list" for newer
gcc versions and "char *" otherwise. This is what most other arches
use, modulo different __GNUC_PREREQ__.

This is in preparation for replacing stdarg.h and varargs.h with
versions based on __builtin_* instead of handwritten code that gcc
3.3.6 and up refuse to compile b/c of lhs casts.

Identical binary code produced.

branches: 1.8.4; 1.8.6; 1.8.8; 1.8.12;
merge ktrace-lwp.

branches: 1.7.16;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

branches: 1.6.2;
add some ISO C 1995 I18N functions and types:
btowc, wctrans, towctrans, wcscoll, wcsxfrm, wctype_t and wctrans_t.

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: 1.1.2; 1.1.10;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

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

branches: 1.3.6;
Use "#define<tab>", white space nits.

cosmetic changes, fix comments.

branches: 1.1.16;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

sh3: asm.h - no ## at token boundaries

For the ## "if the result is not a valid preprocessing token, the
behavior is undefined", so you 1) don't need to 2) must not use it to
concatenate a token with a non-token, like .arg or arg()

The point is kinda moot, as traditionally asm with cpp uses traditional
cpp, not ANSI cpp (many assemblers use # for literals, which conflicts
with the ANSI CPP # stringization and requires awkward workarounds),
but don't set a bad example even if it never gets called out by the
compiler.

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: sh3/asm.h: Respect _NETBSD_REVISIONID.

branches: 1.29.26;
Mark the .ident section as mergable string section to avoid redundant
entries.

branches: 1.28.30; 1.28.40;
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: 1.27.8; 1.27.18; 1.27.22;
Consistently use .gnu.warning with .pushsectio and .popsection on all
architectures instead of obsolete STABS frames for linker warnings.

branches: 1.26.16;
Use pushsection/popsection for RCSID.

branches: 1.25.72; 1.25.76; 1.25.78; 1.25.82;
Add a STRONG_ALIAS macro

Provide PIC_EPILOGUE_SLOT that is safe to use in delay slot.

Introduce PIC_PROLOGUE_NOSAVE for functions that do non-local jumps
and don't need to save/restore r12. Shaves off two instructions.

mova can only have r0 as destination, so PIC_PROLOGUE can not specify
an arbitrary temp register.

Macros for .size directive.

First cut at PIC macros.

branches: 1.19.2;
Implement WARN_REFERENCES.

Prettify.

merge ktrace-lwp.

branches: 1.16.14; 1.16.16;
Definition of __KERNEL_RCSID for asm files.

Bring _PROF_PROLOGUE back. The breakage was caused by calls to
__udivsi3 being treated specially by gcc.

Undo previous. It breaks profiling, but I managed to test against the
wrong tree and so missed it.

Real _PROF_PROLOGUE so that assembly language functions can be profiled.

For ELF put RCSID strings into .ident section.

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

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

branches: 1.10.6; 1.10.12;
Use "#define<tab>", white space nits.

cosmetic changes, fix comments.

Consider __NO_LEADING_UNDERSCORES__ provided by the new ELF toolchain.

branches: 1.7.2;
.type xxx,@function isn't supported under COFF

Altentries should also be marked as functions, to keep linker happy.

Mark syscalls as functions.

branches: 1.4.2;
check __LEADING_UNDERSCORE

Made weak_alias create correct labels on sh-elf.

Add a WEAK_ALIAS() macro.

branches: 1.1.2; 1.1.12;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

branches: 1.3.8;
remove unneeded code and files.

ANSIfy KNF.

branches: 1.1.16;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

Define constants for setting bus widths of physical space areas in BCR2.

branches: 1.6.50; 1.6.56;
merge ktrace-lwp.

branches: 1.5.2;
more register definitions, from nonaka's landisk port.

branches: 1.4.6; 1.4.12;
Use "#define<tab>", white space nits.

Cleanup register definition

branches: 1.2.16;
cleanup

Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

Need to install byte_swap.h and bswap.h needs to include sh3/byte_swap.h.

branches: 1.6.2;
Make the sh3 bswap headers look like all the other ports

branches: 1.5.2;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

branches: 1.4.6; 1.4.28;
Use "#define<tab>", white space nits.

cosmetic changes, fix comments.

ANSIfy KNF.

branches: 1.1.16;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

Switch to new-style <sys/bus.h>.

Sync with <sys/bus_proto.h>: constify source arg of bus_space_write* &co,
fix size_t vs. bus_size_t confusion.

Makes mmeye kernel build again.

branches: 1.17.20;
Remove clause 3 and 4 from TNF licenses

branches: 1.16.68; 1.16.70; 1.16.72;
s/u_intN_t/uintN_t/

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: 1.14.2; 1.14.4;
Make almost everything #include <sys/bswap.h> instead of <machine/bswap.h>
The bswap.h and endian.h files are all rather incestuous, but I want to
get the constant folding stuff into one place - sys/bswap.h

branches: 1.13.2;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

Drop obsolete bus_space_* compat defs.

branches: 1.10.4;
Add missing stream methods (for wdc_pcmcia.c)

branches: 1.9.6; 1.9.12; 1.9.20; 1.9.22;
Use "#define<tab>", white space nits.

Remove #if 0 #endif

ANSIfy KNF.

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: 1.5.4;
add some macros for 8bit PCMCIA access

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: 1.3.4;
SH4!

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

branches: 1.1.2;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

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

Reviewed by christos.

branches: 1.1.54;
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.

Move some macros back to sh3/include/bus_funcs.h from
sh3/sh3/sh3_machdep.c, where I moved them by mistake.

Pull the bus_space(9) routines into a new module,
sh3/sh3/sh3_bus_space.c, that is built only on !landisk.

Fixes the mmeye and landisk builds. Should fix other sh3 ports.

Move the sh_memio_*() declarations back to sh3/include/bus_funcs.h.
Should fix the mmeye build.

Remove redundant, static inline bus_space(9) declarations
from sh3/bus_funcs.h and move the non-inline definitions to
sh3/sh3_machdep.c.

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.

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: 1.4.12; 1.4.200;
Match comment against #endif with #ifdef

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: 1.2.2;
Fix the multiple inclusion protection. hi dsl.

branches: 1.1.2; 1.1.4;
Make the sh3 bswap headers look like all the other ports

Remove clause 3 and 4 from TNF licenses

branches: 1.8.52; 1.8.54; 1.8.56;
Allow shared PV mappings in pmap_enter(9) even on SH4 if VAs of shared pages
have the same virtual cache indexes (i.e. they won't cause virtual cache
aliases). Also prepare PMAP_PREFER(9) for SH4 to avoid some possible virtual
cache aliases.
More stuff should be added in pmap_enter(9), but at least this changes
should fix some existing problems. See discussion on port-sh3 ML for details.

OK'ed by uwe and chs, and closes PR port-sh3/34243.

branches: 1.7.18; 1.7.20;
There's no need to duplicate cpu type ifdef dance here. cputypes.h
already defines CPU_IS_SH[34] as constants for kernels that support
only single cpu type.

branches: 1.6.2;
merge ktrace-lwp.

branches: 1.5.2;
more info for sh4 from nonaka's landisk port.

branches: 1.4.6; 1.4.12;
remove obsolete interface. add defines for inquire cache feature.

Use "#define<tab>", white space nits.

branches: 1.2.2; 1.2.8;
change register naming.

add new cache routine.

Added SH7706 cache flush op.

Remove clause 3 and 4 from TNF licenses

branches: 1.8.68; 1.8.70; 1.8.72;
s/u_intN_t/uintN_t/

branches: 1.7.4; 1.7.6;
__asm__ -> __asm
__const__ -> const
__inline__ -> inline
__volatile__ -> volatile

branches: 1.6.6; 1.6.28;
Use "#define<tab>", white space nits.

cosmetic changes, fix comments.

branches: 1.4.2;
only comments may follow #endif on a line.

branches: 1.3.2;
Cleanup register definition

change register naming.

add new cache routine.

Remove clause 3 and 4 from TNF licenses

branches: 1.11.68; 1.11.70; 1.11.72;
s/u_intN_t/uintN_t/

branches: 1.10.4; 1.10.6;
__asm__ -> __asm
__const__ -> const
__inline__ -> inline
__volatile__ -> volatile

merge ktrace-lwp.

Added EMODE cache operation.

branches: 1.7.2;
remove EMODE support code.
- EMODE support doesn't work fine yet.
- This code is broken for dreamcast.
dramcast call sh4_icache_sync_all() before sh4_cache_config().
(at locore.S)

more additions from nonaka's landisk port.

branches: 1.5.6; 1.5.12;
Use "#define<tab>", white space nits.

cosmetic changes, fix comments.

branches: 1.3.2; 1.3.8;
Cleanup register definition

change register naming.

add new cache routine.

branches: 1.3.10;
Cleanup register definition

branches: 1.2.8;
add some bit definitions

branches: 1.1.2;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

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: 1.5.6; 1.5.152; 1.5.156;
Use "#define<tab>", white space nits.

cosmetic changes, fix comments.

Consider __NO_LEADING_UNDERSCORES__ provided by the new ELF toolchain.

branches: 1.2.4;
check __LEADING_UNDERSCORE instead of __sh3__

branches: 1.1.2;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

Fix doc comment for sh_clock_init.

Forgot to update it back in 2006 when sh3 ports were converted to
todr(9) and its second argument (struct rtc_ops) was removed.

Remove clause 3 and 4 from TNF licenses

branches: 1.3.52; 1.3.54; 1.3.56;
Switch the rest of sh3 ports to todr(9)
Split code to handle on-chip rtc into a separate driver
Eliminate all todr code from clock.c
Move __HAVE_GENERIC_TODR to sh3/include/types.h

branches: 1.2.6; 1.2.28; 1.2.58; 1.2.60;
Use "#define<tab>", white space nits.

branches: 1.1.2; 1.1.8;
New NetBSD/sh3 clock framework.
+ hardclock source is moved from TMU1 to TMU0.
+ SH3/SH4 common kernel support.
+ PCLOCK estimation.
+ remove duplicated code.

branches: 1.6.6;
Use "#define<tab>", white space nits.

cosmetic changes, fix comments.

branches: 1.4.4;
check _BYTE_ORDER instead of BYTE_ORDER

branches: 1.3.2;
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.

branches: 1.2.2;
EXEC_COFF cleanup

branches: 1.1.2;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

branches: 1.5.6;
Use "#define<tab>", white space nits.

cosmetic changes, fix comments.

Cleanup register definition

branches: 1.2.16;
remove extra Id

Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

fix various typos in comments, mainly immediatly/immediately/,
as well shared and recently fixed typos in OpenBSD code by Jonathan Grey.

SH3_P2SEG_FUNC(f) - get a P2 address of a function.


Just SH3_P1SEG_TO_P2SEG + cast, but we now define SH3_P1SEG_TO_P2SEG
and SH3_P2SEG_TO_P1SEG to use arithmetic, not bitwise ops. That gives
the same result for the correct P1/P2 input values, but addition can
be done at link time with addends. Thus SH3_P2SEG_FUNC compiles to a
constant P2 address.

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: 1.56.28; 1.56.30;
make cpu_need_resched() macros consistent; __USE flags

branches: 1.55.8; 1.55.18; 1.55.22;
PROC_PC() should have been changed to LWP_PC().

branches: 1.54.4;
Remove uarea swap-out functionality:

- Addresses the issue described in PR/38828.
- Some simplification in threading and sleepq subsystems.
- Eliminates pmap_collect() and, as a side note, allows pmap optimisations.
- Eliminates XS_CTL_DATA_ONSTACK in scsipi code.
- Avoids few scans on LWP list and thus potentially long holds of proc_lock.
- Cuts ~1.5k lines of code. Reduces amd64 kernel size by ~4k.
- Removes __SWAP_BROKEN cases.

Tested on x86, mips, acorn32 (thanks <mpumford>) and partly tested on
acorn26 (thanks to <bjh21>).

Discussed on <tech-kern>, reviewed by <ad>.

branches: 1.53.4;
Revert interrupt stack changes. There are some issues and, at least
in the current form, they complicate implementation of fast software
interrupts. I'd rather get fast softints in now and may be revisit
interrupt stack later.

Rewrite RUN_P2, RUN_P1 in asm. gcc4 is too happy to optimize away
assigned-goto versions if try to do anything fancy with them
(discovered by trying to wrap RUN_P2 into an "if").

Remove CTL_MACHDEP_NAMES, it's not used anywhere.

Ok by martin@.

branches: 1.50.2; 1.50.6;
Now that sh3 has didicated interrupt stack we can check for cpu_intr_p
with simple sp comparison, so we can drop ci_idepth.

Use dedicated interrupt stack. Tested on hpcsh and landisk. This has
been sitting in my tree for quite a while. While here s/top/bottom/
in a few places related to stacks to confirm to conventional
terminology.

branches: 1.48.2; 1.48.6;
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: 1.47.2;
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.

Make want_resched a member of cpu_info.

branches: 1.45.2; 1.45.4;
Add ci_cpuid where it's missing.

branches: 1.44.2; 1.44.4; 1.44.8;
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: 1.43.2; 1.43.6; 1.43.8; 1.43.14;
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.

branches: 1.41.18;
Declare cpu_reset as __attribute__((__noreturn__)).

Hide RUN_P2 and RUN_P1 from lint.
Drop CONSTCOND as lint doesn't see that code now.
While here, tweak them a bit to use less casts.

Use uint32_t.

branches: 1.38.2;
__asm__ -> __asm
__const__ -> const
__inline__ -> inline
__volatile__ -> volatile

merge ktrace-lwp.

branches: 1.36.12;
include sys/cpu_data.h only if defined(_KERNEL)

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

Move
(c) TNF
line from 4-clause UCB to 3-clause UCB license; in other words,
remove UCB's ad clause from the license TNF grants.
There is no point in TNF demanding that UCB's ad clause be followed
when even UCB doesn't demand it any longer.

Ok'd by board@ and agc@.

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

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

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

branches: 1.31.2;
Merge the nathanw_sa branch.

add some definitions for P[VR]R register

branches: 1.29.6;
Make CLKF_INTR() slightly less broken. The previous definition always
tested true if the CPU was running in the kernel at the time of the clock
interrupt, therefore all such time (kernel and idle) was counted as interrupt
time. The new definition simply punts on trying to count interrupt time,
which allows us to see kernel and idle time.

Use "#define<tab>", white space nits.

add SH4 Processor Version Register

Rework interrupt code.
+ Fully utilize SH SR.I[0:3] interrupt level.
+ software interrupt is emulated by TMU1, 2 one shot interrupt.
+ implement generic soft interrupts.
+ implement clockframe correctly.

cosmetic changes, fix comments.

change to per-process AST.

cpu_swapout() moved to cpu.h

CTL_MACHDEP definitions are integrated into sh3/include/cpu.h again.

machine dependent sysctl are moved to machine/cpu.h
dreamcast, hpcsh ... CPU_CONSDEV
mmeye, evbsh3 ... CPU_CONSDEV, CPU_LOADANDRESET

cpu_dumpconf, reserve_dumppages, dumpsys, cpu_reset are moved to sh3/sh3_machdep.c

Move common exception vector and scheduler code to
sh3/sh3/exception_vector.S and sh3/sh3/locore_subr.S. exception
vectors are installed by sh_cpu_init(). machine/locore.S contains
kernel entry, interrupt handler, and some MD code.

New NetBSD/sh3 clock framework.
+ hardclock source is moved from TMU1 to TMU0.
+ SH3/SH4 common kernel support.
+ PCLOCK estimation.
+ remove duplicated code.

Clean up function declaration.

Add new MMU API. for detail, see sh3/mmu.h's comment.

ANSIfy KNF.

add useful macro for running P2, P1 area.

branches: 1.13.2;
fix KERNELMODE() macro (check MD bits, too)

use _KERNEL_OPT

branches: 1.11.2;
Add some comments about P/USEG

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: 1.9.2;
Remove child_return prototype; it is now in sys/proc.h.

branches: 1.8.2;
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.

SH4!

add SH3_{PHYS,P1SEG,P2SEG}_TO_{PHYS,P1SEG,P2SEG} macros

back to previous one (suggested by cgd)

move sysctl definitions into ${MACHINE}/include/cpu.h

G.C.

branches: 1.2.2; 1.2.8;
Catch up with -current.

Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

branches: 1.15.8;
SR related parts moved to psl.h. cpufunc.h segments.h are removed.
kernel mode checking is only SR.MD. no check stack pointer.

Cleanup register definition

New NetBSD/sh3 clock framework.
+ hardclock source is moved from TMU1 to TMU0.
+ SH3/SH4 common kernel support.
+ PCLOCK estimation.
+ remove duplicated code.

Clean up functions
disable_intr, enable_intr, disable_interrupt, enable_interrupt,
disable_ext_intr, enable_ext_intr.
New functions:
for external interrupt:
_cpu_intr_suspend and _cpu_intr_resume.
for exception:
_cpu_exception_suspend and _cpu_exception_resume.

Add new MMU API. for detail, see sh3/mmu.h's comment.

ANSIfy KNF.

add new cache routine.

add SH-internal memory mapped register access method.

branches: 1.7.2;
use MMUCR_TF macro defined in mmureg.h

Add breakpoint().

- move MMUCR_VALIDBITS definition into mmureg.h.
- access correct address in cacheflush().

branches: 1.4.4;
SH4!

KNF

branches: 1.2.2;
enclose tlbflush(), disable_intr() and enable_intr() with #ifder _KERNEL

Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

_LKM -> _MODULE

Define CPU_PRODUCT_STX7105.

I'm not sure if this should rather be named CPU_PRODUCT_ST40_300, but
that's probably too general. These constants don't have to be
backward compatible, so we can re-do this properly later if we need to.

Add SH7706

branches: 1.11.8; 1.11.14;
Remove clause 3 and 4 from TNF licenses

branches: 1.10.72; 1.10.74; 1.10.76;
Add CONSTCOND to make lint happy.

branches: 1.9.2;
merge ktrace-lwp.

branches: 1.8.2;
more additions from nonaka's landisk port.

branches: 1.7.6; 1.7.12;
Use "#define<tab>", white space nits.

remove duplicated SH3, SH4 define.

* Defflag the SH3 and SH4 options.
* In <sh3/cputypes.h>, always define both SH3 and SH4 if _LKM is defined.

Define all CPU types if _LKM is defined.

Rework interrupt code.
+ Fully utilize SH SR.I[0:3] interrupt level.
+ software interrupt is emulated by TMU1, 2 one shot interrupt.
+ implement generic soft interrupts.
+ implement clockframe correctly.

To determine CPU architecture and product, add cpu_arch and cpu_prduct variables.
these are initialized by sh_cpu_init()@sh3/sh3_machdep.c
(see sh3/include/cputypes.h for detail.)
add "options SH3" for SH3 kernel config file.

branches: 1.1.16;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

merge ktrace-lwp.

branches: 1.1.4;
Register definitions for SH7709 DAC.

branches: 1.3.4;
clean up disassembler code.

Use "#define<tab>", white space nits.

branches: 1.1.16;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

remove (db_addr_t) cast in sh3 PC_REGS(regs) definition.

Fixes KGDB build option for SH3/4 code.

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: 1.16.14;
Introduce DDB_EXPR_FMT and replace the logic around DB_EXPR_T_IS_QUAD.

branches: 1.15.2;
Retire struct user, remove sys/user.h inclusions. Note sys/user.h header
as obsolete. Remove USER_TO_UAREA/UAREA_TO_USER macros.

Various #include fixes and review by matt@.

branches: 1.14.20;
Fix IS_BREAKPOINT_TRAP: EXP_BREAK is not a breakpoint trap, it's UBC
(user break controller) trap, and we use UBC for single-stepping, not
for ddb breakpoints. ddb breakpoints are "trapa 0xc3".

branches: 1.13.42; 1.13.44; 1.13.46; 1.13.48;
Replace the Mach-derived boolean_t type with the C99 bool type. A
future commit will replace use of TRUE and FALSE with true and false.

branches: 1.12.14;
Fix a bunch of cast lvalues.

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: 1.10.4; 1.10.6; 1.10.8; 1.10.10; 1.10.12;
Declare ddb_regs extern in db_machdep.h and provide the defintion in
db_interface.c.

branches: 1.9.18;
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.

branches: 1.8.6;
rework general exception, and TLB exception handling for new pmap.
all exception staffs are moved to exception.[ch]

Use "#define<tab>", white space nits.

cosmetic changes, fix comments.

Initial support for KGDB on the sh3.

TLB dump command added to DDB

branches: 1.3.4;
DDB single step and stack trace support.

remove include of <vm/vm.h>. <vm/vm.h> -> <uvm/uvm_extern.h>

branches: 1.1.2;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

s/embeded/embedded/ in comments and messages.

Remove clause 3 and 4 from TNF licenses

branches: 1.5.72; 1.5.74; 1.5.76;
Use foo &= ~(type)mask; instead of foo &= (type)~mask; to make lint happy.
While here, convert to uintN_t.

branches: 1.4.2;
__asm__ -> __asm
__const__ -> const
__inline__ -> inline
__volatile__ -> volatile

branches: 1.3.22;
Add _reg_bset_[124]() and _reg_bclr_[124]() macro for
SH embeded device registers.

branches: 1.2.6;
Use "#define<tab>", white space nits.

branches: 1.1.6; 1.1.10;
Cleanup register definition

name it like other ports do

branches: 1.8.12; 1.8.22;
If cpu_disklabel includes struct dkbad, define __HAVE_DISKLABEL_DKBAD.
This allows use of subr_disk_mbr on all archs. Default to it for
the rump disk component. No functional change for regular kernels.
(The other option would've been to include dkbad in disklabels
everywhere, but arguably this approach has less possible side-effects,
especially given that wedges and related magic will take over the
world any second now).

branches: 1.7.78;
merge ktrace-lwp.

Make disklabel(8) and fdisk(8) into "host tools " last step: build
and install ${TOOLDIR}/bin/${MACHINE_GNU_PLATFORM}-disklabel,
${TOOLDIR}/bin/${MACHINE_GNU_PLATFORM}-fdisk by "reaching over" to
the sources in ${NETBSDSRCDIR}/sbin/{disklabel fdisk}/.

To avoid clashes with a build-host's header files, especially on
*BSD, the host-tools versions of fdisk and disklabel search for
#includes such as disklabel.h, disklabel_acorn.h, disklabel_gpt.h,
and bootinfo.h in a new #includes namespace, nbinclude/. That is,
they #include <nbinclude/sys/disklabel.h>, <nbinclude/machine/disklabel.h>,
<nbinclude/sparc64/disklabel.h>, instead of <sys/disklabel.h> and
such. I have also updated the system headers to #include from
nbinclude/-space when HAVE_NBTOOL_CONFIG_H is #defined.

Overhaul MBR handling (part 1):

<sys/bootblock.h>:
* Added definitions for the Master Boot Record (MBR) used by
a variety of systems (primarily i386), including the format
of the BIOS Parameter Block (BPB).
This information was cribbed from a variety of sources
including <sys/disklabel_mbr.h> which this is a superset of.

As part of this, some data structure elements and #defines
were renamed to be more "namespace friendly" and consistent
with other bootblocks and MBR documentation.
Update all uses of the old names to the new names.

<sys/disklabel_mbr.h>:
* Deprecated in favor of <sys/bootblock.h> (the latter is more
"host tool" friendly).

amd64 & i386:
* Renamed /usr/mdec/bootxx_dosfs to /usr/mdec/bootxx_msdos, to
be consistent with the naming convention of the msdosfs tools.

* Removed /usr/mdec/bootxx_ufs, as it's equivalent to bootxx_ffsv1
and it's confusing to have two functionally equivalent bootblocks,
especially given that "ufs" has multiple meanings (it could be
a synonym for "ffs", or the group of ffs/lfs/ext2fs file systems).

* Rework pbr.S (the first sector of bootxx_*):
+ Ensure that BPB (bytes 11..89) and the partition table
(bytes 446..509) do not contain code.
+ Add support for booting from FAT partitions if BOOT_FROM_FAT
is defined. (Only set for bootxx_msdos).
+ Remove "dummy" partition 3; if people want to installboot(8)
these to the start of the disk they can use fdisk(8) to
create a real MBR partition table...
+ Compile with TERSE_ERROR so it fits because of the above.
Whilst this is less user friendly, I feel it's important
to have a valid partition table and BPB in the MBR/PBR.

* Renamed /usr/mdec/biosboot to /usr/mdec/boot, to be consistent
with other platforms.

* Enable SUPPORT_DOSFS in /usr/mdec/boot (stage2), so that
we can boot off FAT partitions.

* Crank version of /usr/mdec/boot to 3.1, and fix some of the other
entries in the version file.

installboot(8) (i386):
* Read the existing MBR of the filesystem and retain the BIOS
Parameter Block (BPB) in bytes 11..89 and the MBR partition
table in bytes 446..509. (Previously installboot(8) would
trash those two sections of the MBR.)

mbrlabel(8):
* Use sys/lib/libkern/xlat_mbr_fstype.c instead of homegrown code
to map the MBR partition type to the NetBSD disklabel type.


Test built "make release" for i386, and new bootblocks verified to work
(even off FAT!).

branches: 1.4.2; 1.4.8;
change disklabel to
16 partition.
no bsd area of the disk.

branches: 1.3.2;
Use "#define<tab>", white space nits.

ANSIfy KNF.

branches: 1.1.16;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

sh3/dmacreg.h: revert snprintb change

The the snprintb format strings produced nice-looking output, even
though they combine the 'f' and ':' conversions, which in other cases
can produce garbled output. Instead of "fixing" these particular format
strings, the snprintb function should allow these variants.

sh3/dmacreg.h: fix snprintb definitions

In the previous definitions, the 'f' conversion was combined with the
':' conversion, which snprintb rejects at runtime, starting with
snprintb.c 1.47 from 2024-04-07.

Include #include <sh3/devreg.h> like other *reg.h do.

branches: 1.2.26; 1.2.30; 1.2.32;
merge ktrace-lwp.

branches: 1.1.2; 1.1.14;
Register definitions for sh3 integrated DMA controller.

sh3/elf_machdep.h: organize symbols into toolchain & local groups.

Allow this file to be used 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.

binutils decided to shuffle around its extensions a long time ago. Since
we don't actually use them for anything, follow them.

branches: 1.11.2; 1.11.4;
instead of bitching about the missing endianness, get it.

branches: 1.10.22; 1.10.38;
Add TLS relocation definitions.

branches: 1.9.56;
Don't worry about the ELF32_MACHDEP_ENDIANNESS macro when compiling
a host tool - it's never used there.

branches: 1.8.6; 1.8.28; 1.8.58; 1.8.60;
Use "#define<tab>", white space nits.

Add SuperH ELF header flags.

Add SuperH relocation types.

Add support for dumping ELF-cormat core files.

branches: 1.4.2;
When the endians are little, they are little.

branches: 1.3.6;
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;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

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.

block prototype definitions with _LOCORE (for .S)

branches: 1.1.2;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

branches: 1.1.6;
In the `MY THAT'S GROSS' department...
Eliminate the recursive include of machine/endian.h from sys/endian.h.

Add SH4 INTEVT codes for GPIO.

Remove clause 3 and 4 from TNF licenses

branches: 1.10.2; 1.10.4;
Sort SH4_INTEVT_PCI* codes.

branches: 1.9.58;
exp_type[] was constified in exception.c but an extern declaration in
db_interface.c was not updated. Declare it publicly. While here,
constify the array itself too.

branches: 1.8.2;
s/u_intN_t/uintN_t/

branches: 1.7.4; 1.7.6;
merge ktrace-lwp.

branches: 1.6.2;
more additions from nonaka's landisk port.

INTEVT2 values for DMAC interrupts.

branches: 1.4.2;
Add sh7709 INTEVT2 codes for IRQs, PINTs, IRDA and ADC.

branches: 1.3.6; 1.3.8;
rework general exception, and TLB exception handling for new pmap.
all exception staffs are moved to exception.[ch]

Use "#define<tab>", white space nits.

branches: 1.1.2;
Rework interrupt code.
+ Fully utilize SH SR.I[0:3] interrupt level.
+ software interrupt is emulated by TMU1, 2 one shot interrupt.
+ implement generic soft interrupts.
+ implement clockframe correctly.

remove exec_coff.h

branches: 1.1.2;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

Sprinkle <sys/featuretest.h> where _*_SOURCE macros are consulted.

Otherwise, the feature tests might come out wrong. For example,
header files that check for _NETBSD_SOURCE won't get the default when
no other _*_SOURCE macros are defined; header files that check for
_POSIX_C_SOURCE might miss _XOPEN_SOURCE, which is supposed to imply
a corresponding _POSIX_C_SOURCE.

PR lib/58752: various header files test _*_SOURCE macros but don't
include sys/featuretest.h

branches: 1.3.12; 1.3.52;
provide a common softfloat fenv implemenation and use it for softfloat builds.
restore ABI compatibility with previous releases for ieeefp.h on sh3.
add namespace.h protection for all the fenv interfaces.
use MKSOFTFLOAT on sh3 instead of assuming softfloat.
standardize on comparing MKSOFTFLOAT with "no".
remove the arm-specific softfloat fenv code (which also had several bugs).
fix logic errors in the arm hardfloat feraiseexcept() and feupdateenv().

branches: 1.2.2; 1.2.4; 1.2.6;
fake some stuff for softfloat.

fenv.h for sh

Rename <sys/float_ieee.h> to <sys/float_ieee754.h>, following libc's
convention for these.

PR/3012: Greg A. Woods: Write all float.h files [except the vax of course]
in terms of float_ieee.h

branches: 1.3.6;
Use "#define<tab>", white space nits.

cosmetic changes, fix comments.

branches: 1.1.16;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

branches: 1.1.2; 1.1.4; 1.1.18;
fenv.h for sh

Remove COMPAT_SA / KERN_SA. Welcome to 6.99.3!
Approved by core@.

branches: 1.19.16; 1.19.20;
Move COMPAT_16 signal stuff to the new compat_16_machdep.c file, so
that it can be built as part of a module.

branches: 1.18.2;
Merge wrstuden-revivesa into HEAD.

branches: 1.17.4;
Add GBR register to switchframe.

While here, reorder switchframe so that we can shave off a few
instructions when restoring it (group stack registers at the end, make
sure that last and first registers are safe to load/store in delay
slots).

Add GBR register to trapframe.

branches: 1.15.44; 1.15.46; 1.15.48; 1.15.50;
Merge newlock2 to head.

branches: 1.14.20;
merge ktrace-lwp.

branches: 1.13.16;
Move
(c) TNF
line from 4-clause UCB to 3-clause UCB license; in other words,
remove UCB's ad clause from the license TNF grants.
There is no point in TNF demanding that UCB's ad clause be followed
when even UCB doesn't demand it any longer.

Ok'd by board@ and agc@.

Implement siginfo for sh3.

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

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

branches: 1.10.2;
Merge the nathanw_sa branch.

When delivering a signal, don't push the signum, code, and context pointer,
or handler onto the stack. Instead, just stuff them into the correct
argument registers (handler is a "4th arg").

branches: 1.8.2; 1.8.6;
s/trapno/expevt/ for clarity.

Use "#define<tab>", white space nits.

Rework interrupt code.
+ Fully utilize SH SR.I[0:3] interrupt level.
+ software interrupt is emulated by TMU1, 2 one shot interrupt.
+ implement generic soft interrupts.
+ implement clockframe correctly.

cosmetic changes, fix comments.

kernel stack fix. old code simply P3 address converted to P1, it
caused memory destruction when kernel stack grow over 1 page. new
code use P3 address for kernel stack. but for the sake of debug, P1
kernel stack mode remain.

Move common exception vector and scheduler code to
sh3/sh3/exception_vector.S and sh3/sh3/locore_subr.S. exception
vectors are installed by sh_cpu_init(). machine/locore.S contains
kernel entry, interrupt handler, and some MD code.

branches: 1.2.4;
DDB single step and stack trace support.

branches: 1.1.2;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

merge ktrace-lwp.

Push back the descriptions of NaN formats, and descriptions of the
distinction between signalling NaNs and quiet NaNs back into the
machine-dependent headers; treat the implementation of __nanf in the
same spirit.

IEEE 754 leaves the distinction between signalling NaNs and quiet NANs
to the implementation, and unlike our headers used to suggest they're
not identical in the interpretation of the fraction's MSb; in due
course, make those of hppa, mips, sh3, and sh5 reflect reality.

branches: 1.6.8; 1.6.14;
Use <sys/ieee754.h> where applicable.

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

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

branches: 1.4.12; 1.4.18;
Remove #if 0 #endif

branches: 1.3.2;
There is no extended-precision format on sh3.

branches: 1.2.2;
check _BYTE_ORDER instead of BYTE_ORDER

branches: 1.1.2; 1.1.12;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

provide a common softfloat fenv implemenation and use it for softfloat builds.
restore ABI compatibility with previous releases for ieeefp.h on sh3.
add namespace.h protection for all the fenv interfaces.
use MKSOFTFLOAT on sh3 instead of assuming softfloat.
standardize on comparing MKSOFTFLOAT with "no".
remove the arm-specific softfloat fenv code (which also had several bugs).
fix logic errors in the arm hardfloat feraiseexcept() and feupdateenv().

branches: 1.6.2;
fake some stuff for softfloat.

use fenv.h

branches: 1.4.38; 1.4.58; 1.4.62;
Update <machine/ieeefp.h> to use the C99 FE_* definitions instead of the
NetBSD defined ones. Redefine the NetBSD ones in terms of the C99 ones.
Step 1 to having <fenv.h>

branches: 1.3.6; 1.3.114; 1.3.118; 1.3.120; 1.3.124;
Use "#define<tab>", white space nits.

cosmetic changes, fix comments.

branches: 1.1.16;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

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

branches: 1.4.18;
fix wrong integer promotion rule(removed U suffix from UINT{8,16}_C).
see ISO/IEC 9899:1999 7.18.4.3.

branches: 1.3.20; 1.3.22;
Remove clause 3 and 4 from TNF licenses

branches: 1.2.6; 1.2.114; 1.2.116; 1.2.118;
Use "#define<tab>", white space nits.

branches: 1.1.2; 1.1.4; 1.1.6;
Add definitions of C99 integer constant macros.

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

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

branches: 1.3.6; 1.3.114; 1.3.116; 1.3.118;
Use "#define<tab>", white space nits.

branches: 1.2.2; 1.2.4;
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: 1.8.44;
Remove clause 3 and 4 from TNF licenses

branches: 1.7.16; 1.7.18; 1.7.20;
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: 1.5.30; 1.5.38; 1.5.44; 1.5.48; 1.5.50;
merge ktrace-lwp.

branches: 1.4.12;
Factor out W{CHAR,INT}_{MAX,MIN} into their own header file.

branches: 1.3.6; 1.3.12;
Use "#define<tab>", white space nits.

branches: 1.2.2; 1.2.4;
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: 1.5.44;
Remove clause 3 and 4 from TNF licenses

branches: 1.4.74; 1.4.76; 1.4.78;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

branches: 1.3.6; 1.3.28;
Use "#define<tab>", white space nits.

branches: 1.2.2; 1.2.4;
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: 1.8.122;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

branches: 1.6.2;
Include <sys/cdefs.h> for __signed; related to lib/30072.

branches: 1.5.6; 1.5.14;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

branches: 1.4.18; 1.4.24;
* 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.

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.

merge ktrace-lwp.

Added SH7751{,R} integrated PCI controller support.

branches: 1.8.2;
more additions from nonaka's landisk port.

Add definitions for IRR0 bits.

branches: 1.6.6; 1.6.12;
Use "#define<tab>", white space nits.

add SH7750S IPRD register define

Cleanup register definition

branches: 1.3.4;
check _BYTE_ORDER instead of BYTE_ORDER

branches: 1.2.2; 1.2.12;
remove extra Id

Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

Interrupt handling changes (revision 1.23) bumped down _IPL_N to 8 for
some reason. Restore it to correct 16.

HTF did hpcsh work all this time with hd6446x_imask[_IPL_N] indexed
with IPLs 0..15 is a mistery... Discovered by accidentally triggering
hd64461 timer interrupt that is not enabled and should have been
masked.

_IPL_N used to be *also incorrect* 15 before Andy's change, which
makes one wonder if dumb luck is severly underappreciated.

branches: 1.25.8; 1.25.10; 1.25.14;
Remove clause 3 and 4 from TNF licenses

branches: 1.24.6; 1.24.8; 1.24.10;
G/c bogus includes that do nothing but add circular dependency between
intr.h and mutex.h

branches: 1.23.6;
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: 1.22.28; 1.22.46; 1.22.48; 1.22.54;
EVTCODE_TO_MAP_INDEX - tweak to help gcc produce better code.

branches: 1.21.2;
merge ktrace-lwp.

Added SH7751{,R} integrated PCI controller support.

branches: 1.19.16;
Redo a quick hack for intc_intr_disable() and intc_intr_enable() to have
a saner interface/semantic.

Make intc_intr_priority() return old level. While here, make the code
more compact by factoring out register update to happen in one place,
outside the switch statements.

Add intc_intr_disable() and intc_intr_enable().

branches: 1.17.6; 1.17.12;
Use "#define<tab>", white space nits.

Rework interrupt code.
+ Fully utilize SH SR.I[0:3] interrupt level.
+ software interrupt is emulated by TMU1, 2 one shot interrupt.
+ implement generic soft interrupts.
+ implement clockframe correctly.

branches: 1.15.2;
SR related parts moved to psl.h. cpufunc.h segments.h are removed.
kernel mode checking is only SR.MD. no check stack pointer.

Clean up functions
disable_intr, enable_intr, disable_interrupt, enable_interrupt,
disable_ext_intr, enable_ext_intr.
New functions:
for external interrupt:
_cpu_intr_suspend and _cpu_intr_resume.
for exception:
_cpu_exception_suspend and _cpu_exception_resume.

ANSIfy KNF.

Spell 'occurred' with two 'r's.

branches: 1.11.2; 1.11.4;
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.

branches: 1.10.2;
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).

add an INTEVT code for WDT

make spllower() return void.

branches: 1.5.4;
move the Interrput Priority Level (IPL_*) definitions into MD part.

multiple interrputs!!!

fix missing SCI IRQ mask/unmask code.

branches: 1.2.2;
Catch up with -current.

Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

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

branches: 1.14.26; 1.14.28;
Since all our compilers support __DBL_* and __FLT_*, use them to define
{DBL,FLT}_{DIG,MIN,MAX}

branches: 1.13.4; 1.13.8;
add missing SSIZE_MIN

branches: 1.12.2;
- Normalize inclusion protection (remove)
- Move CHAR_{MIN,MAX} to a common file.
- Fix broken comments

branches: 1.11.8; 1.11.12;
1. MB_LEN_MAX switch MD to MI.
2. unfortunately hppa's MB_LEN_MAX is defined incorrectly 6 instead of 32
so we have to add more setlocale(3) __RENAME func, __setlocale50.
3. move setlocale1.c and setlocale32.c to lib/libc/compat/locale/*
prepareing for next libc major crunk.
4. bump libc minor version.

branches: 1.10.20; 1.10.40; 1.10.42;
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: 1.8.30; 1.8.38; 1.8.44; 1.8.48; 1.8.50;
merge ktrace-lwp.

branches: 1.7.16;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

branches: 1.6.2;
Add a new feature-test macro, _NETBSD_SOURCE. If this is defined
by the application, all NetBSD interfaces are made visible, even
if some other feature-test macro (like _POSIX_C_SOURCE) is defined.
<sys/featuretest.h> defined _NETBSD_SOURCE if none of _ANSI_SOURCE,
_POSIX_C_SOURCE and _XOPEN_SOURCE is defined, so as to preserve
existing behaviour.

This has two major advantages:
+ Programs that require non-POSIX facilities but define _POSIX_C_SOURCE
can trivially be overruled by putting -D_NETBSD_SOURCE in their CFLAGS.
+ It makes most of the #ifs simpler, in that they're all now ORs of the
various macros, rather than having checks for (!defined(_ANSI_SOURCE) ||
!defined(_POSIX_C_SOURCE) || !defined(_XOPEN_SOURCE)) all over the place.

I've tried not to change the semantics of the headers in any case where
_NETBSD_SOURCE wasn't defined, but there were some places where the
current semantics were clearly mad, and retaining them was harder than
correcting them. In particular, I've mostly normalised things so that
_ANSI_SOURCE gets you the smallest set of stuff, then _POSIX_C_SOURCE,
_XOPEN_SOURCE and _NETBSD_SOURCE in that order.

Tested by building for vax, encouraged by thorpej, and uncontested in
tech-userlevel for a week.

branches: 1.5.6;
Use "#define<tab>", white space nits.

cosmetic changes, fix comments.

branches: 1.3.4;
Preparation for the future introduction of multibyte locale.
- MB_LEN_MAX is increased to 32.
- To ensure binary compatibility for old executables
under multibyte locale, versioned setlocale is added.
- __mb_len_cur definision is added in setlocale.c
and enable it in stdlib.h .
It is also important for multibyte locale stuffs,
but I just forgot.

branches: 1.2.2; 1.2.4;
Define ISO C99 (unsigned) long long (min, max) symbols.

branches: 1.1.2;
Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

sh3: __cpu_simple_unlock needs __insn_barrier.

No multiprocessor support here but the compiler can still reorder
memory access.

Nix mb_* on sh3.

branches: 1.17.4;
more const.

branches: 1.16.22;
Fix inline asm for tas.b. "=m" is not restrictive enough and gcc may
decide to use addressing modes that tas.b does not support. 'V' is
advertised to be "non-offsettable" subset of 'm' but there's a bug in
gcc that prevents "=V" from working.

When in doubt use brute force, so pass lock pointer as "r" input and
declare "memory" as clobbered.

Landisk kernel diff is 5 instructions (register choice for lock
address in __cpu_simple_lock_try).

sys/dev/raidframe/rf_copyback.c - where old __asm triggered incorrect code
- successfully compiles (as part of sys/rump/dev/lib/libraidframe).

Remove clause 3 and 4 from TNF licenses

branches: 1.14.16; 1.14.18; 1.14.20;
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.

Merge nick-csl-alignment.

branches: 1.12.8; 1.12.12; 1.12.16; 1.12.18;
Note in that TAS.B in inline asm clobbers "cc".
Use MOVT instead of clear+rotate with carry in __cpu_simple_lock_try.

branches: 1.11.2; 1.11.6;
Merge newlock2 to head.

branches: 1.10.18;
Nuke __P.

branches: 1.9.2;
inline -> __inline

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

merge ktrace-lwp.

branches: 1.6.16;
Move __cpu_simple_lock_t and __SIMPLELOCK_{UN,}LOCKED to machine/types.h
so that they can be used in a namespace-friendly way.

branches: 1.5.2;
- Change __cpu_simple_lock_t from int to unsigned char.
This makes simple lock work on big-endian platforms.
- Assembly-level optimization of __cpu_simple_lock_try().

OK'd by Gregory McGarry. Closes PR port-sh3/20311.

Implement CPU spinlocks. Compile-tested only.

branches: 1.3.8;
cosmetic changes, fix comments.

branches: 1.2.6; 1.2.10;
Let each platform typedef the new __cpu_simple_lock_t, which should
be the most efficient type used for the atomic operations in the
simplelock structure, and should also be __volatile.

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>.

Since __INTR_MASK + __EXCEPTION_UNBLOCK is common sequence, provide
__INTR_MASK_EXCEPTION_UNBLOCK combo version that does stc/ldc just once.

__EXCEPTION_ENTRY - "tst" already does logical AND, so shave off extra
"mov" and "and" and just test PSL_MD bit directly.

While here - shuffle around instructions to construct PSL_MD to break
dependencies.

While still here - only interrupt vector uses SSR and SPC as function
args, so don't bother saving them here in r4 and r5. Other vectors
don't need them and interrupt vector can just as well "stc" them
directly before exceptions are enabled.

branches: 1.20.2;
Allow co-existance of traditional and modern CPP

branches: 1.19.20; 1.19.26;
Add GBR register to trapframe.

In __EXCEPTION_RETURN use ldc.l to shave off couple of instructions.