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: 1.35.2;
Add a common m68k interrupt dispatch implementation.

Add a header file for 68030-specific MMU definitions, specifically the
Transparent Translation registers, that do not exist on the 68851. A
big comment at the top of the file describes the differences between
the 68851 and the 68030's MMU.

Add new headers that describe the 68851 (and 68030) MMU and
68040 (and 68060) MMU structures using names that more closely
align with Motorola's documentation.

The definitions here automagically adapt to 4K or 8K pages, based
on the value of PGSHIFT, which must be a compile-time constant.

Add MAX/MIN PAGE_SIZE and PAGE_SHIFT definitions of m68k for jemalloc(3).

Background:
- All m68k ports have fixed PAGE_SIZE value in their kernels,
but each port uses different PAGE_SIZE value (4096 or 8192)
due to historical reasons.
- Currently module(7) binaries are built per each port so
all m68k kernel sources don't support run-time variable PAGE_SIZE.
- MI <uvm/uvm_param.h> assumes that the port supports a variable
PAGE_SIZE on module(7) builds if both MAX_PAGE_SIZE and MIN_PAGE_SIZE
are defined and they have different values.
- On the other hand, jemalloc(3) checks MAX_PAGE_SHIFT in
src/external/bsd/jemalloc/include/jemalloc/internal/jemalloc_internal_defs.h
for internal optimization.
- m68k ports share userland binaries (especially pkgsrc binaries)
among all ports, so we need to define MAX_PAGE_SHIFT as 13 to
support m68k ports where PAGE_SIZE==8192.
(though this would affect only if static binaries built on
4k page hosts are executed on 8k page hosts)

To solve these inconsistency on PAGE_SIZE definitions,
we should have an independent PAGE_SIZE related definitions
for userland, but it requires major reorganization.
For now (especially for netbsd-9) we define MAX/MIN PAGE_SIZE and
PAGE_SHIFT values in <m68k/vmparam.h> only in !defined(_KERNEL) case.

Discussed on source-changes-d@ and tech-kern@ with christos@ and thorpej@:
https://mail-index.netbsd.org/source-changes-d/2020/01/thread1.html#012035
https://mail-index.netbsd.org/tech-kern/2020/01/thread1.html#025954

Should be pulled up to netbsd-9.

branches: 1.31.4; 1.31.6;
- 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.

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: 1.29.16; 1.29.18;
fenv for m68k

branches: 1.28.8;
Export fpreg.h for libc

branches: 1.27.2; 1.27.12; 1.27.16;
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: 1.25.4;
don't install <machine/db_machdep.h>, this is kernel only

Populate /usr/include/m68k with both pmap_motorola.h and pte_motorola.h.
/usr/include/m68k/pmap.h expects to find pmap_motorola.h, and
/usr/include/machine/pte.h wants pte_motorola.h.

branches: 1.23.4; 1.23.6; 1.23.8; 1.23.10; 1.23.12;
merge ktrace-lwp.

branches: 1.22.12;
Factor out W{CHAR,INT}_{MAX,MIN} into their own header file.

SA_SIGINFO support for m68k

branches: 1.20.2;
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.

m68k syscall rototill:

- Switch all m68k-based ports over to __HAVE_SYSCALL_INTERN.
- Add systrace glue.
- Define struct mdproc in <m68k/proc.h> instead of <machine/proc.h>.
(They were all defined exactly the same anyway, other than a couple
of the MDP_* flags.)

branches: 1.16.2;
bus_dma(9) pulled pretty much verbatim from next68k.

No point in installing svr4_machdep.h.

branches: 1.14.2; 1.14.8;
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.

Install byte_swap.h on make includes.

branches: 1.9.2;
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".

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

branches: 1.5.2;
Add COMPAT_SVR4 for m68k.

branches: 1.4.4;
Provide a minimal instruction/data cache synchronization C binding.
(The function has always been in the kernels as special trap #12).
In response to PR 4951 by Hauke Fath.

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.

Add elf_machdep.h to the INCS list.

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

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

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

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

Proposed and discussed on a mailing list (twice).

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

branches: 1.24.18;
Make clock_t unsigned int everywhere.
Ok: matt@, mrg@

branches: 1.23.12; 1.23.28; 1.23.30;
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: 1.21.4; 1.21.6;
merge christos-time_t

branches: 1.20.16; 1.20.18; 1.20.22; 1.20.30;
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: 1.18.8; 1.18.16; 1.18.22; 1.18.26; 1.18.28;
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: 1.17.20; 1.17.22;
merge ktrace-lwp.

branches: 1.16.2;
For GCC3 and beyond, use the __builtin_va_* types and functions to
deal with variable argument lists.

branches: 1.15.8;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

branches: 1.14.2;
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: 1.9.14; 1.9.22;
Provide definitions for intptr_t and uintptr_t, signed resp. unsigned integral
types large enough to hold any pointer.

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

Define _BSD_CLOCKID_T_ and _BSD_TIMER_T_

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

new RCS ID format.

new way of naming things

Add _SSIZE_T_.

add rcsids to everything and clean up headers

add from net2. were symlinks to ../../vax/include/*

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

branches: 1.3.8;
Don't define __LDPGSZ if it's already defined.

branches: 1.2.34;
Garbage-collect some things no longer needed since there are no longer
m68k4k ports.

All of the m68k ports' exec.h's were essentially the same. Merge them.

Override the N_PAGSIZ() macro; this one checks the MID of the executable
and returns the appropriate page size.

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: m68k/asm.h: Respect NETBSD_REVISIONID.

branches: 1.35.6;
Remove trailing spaces and TABs.

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

branches: 1.33.30; 1.33.40;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

Adjust LEA_LCL, GOT_SETUP, INTERRUPT_{SAVE,RESTORE}REG for Coldfire

branches: 1.31.2;
Make INTERRUPT_{SAVE,RESTORE}REG visible to userland

Remove non __ELF__ clauses.
Add GOT_SETUP and LEA_LCL macros.

Add an END macro. reorder EXTBL macro

branches: 1.28.4; 1.28.14; 1.28.18;
Put RCSIDs in section .ident. (use .pushsection/.popsection)

branches: 1.27.2; 1.27.4;
Consistently use .gnu.warning with .pushsectio and .popsection on all
architectures instead of obsolete STABS frames for linker warnings.

Move counting of faults, traps, intrs, soft[intr]s, syscalls, and nswtch
from uvmexp to per-cpu cpu_data and move them to 64bits. Remove unneeded
includes of <uvm/uvm_extern.h> and/or <uvm/uvm.h>.

branches: 1.25.22;
Remove clause 3 and 4 from TNF licenses

branches: 1.24.72; 1.24.74; 1.24.76;
Add a STRONG_ALIAS macro

branches: 1.23.8; 1.23.40; 1.23.52;
mcount() is named __mcount() on ELF, do the right thing.

define VECTOR() and friends in non-_KERNEL environments too.

Add an EXTBL macro.

branches: 1.20.2;
Add a WEAK_ALIAS() macro.

branches: 1.19.6;
Add register prefixes.

branches: 1.18.2; 1.18.4; 1.18.6;
* Change multiple inclusion protection symbols to use the standard naming
convention (not that it should matter for assembly).
* Provide an additional set of _C_LABEL() macros for ELF.
* Provide a PIC_PLT() macro for the benefit of ELF.

branches: 1.17.6;
Argh, fix the ANSI CPP version of the a.out WARN_REFERENCES().

Implement WARN_REFERENCES().

Copyright assigned to The NetBSD Foundation.

branches: 1.14.2;
Don't have kernel vs. non-kernel versions of _ENTRY(); there's no
reason to omit the .type directive in the kernel case.

Add several useful macros:
- ENTRY_NOPROFILE() and ASENTRY_NOPROFILE(), similar to ENTRY() and
ASENTRY(), but without the profiling prologue.
- GLOBAL()/ASGLOBAL() and LOCAL()/ASLOCAL(), for defining global and
local variables with C and ASM labels.
- BSS()/ASBSS(), for defining items in the BSS segment, with C or
ASM labels.
- PANIC("panic message") - shorthand for calling panic() from assembly code.
- VECTOR(), ASVECTOR(), VECTOR_UNUSED - shorthand for defining entries
in the vector table.
Also, change RCSID() to pad out the string to even boundary.

PROF -> GPROF

Added new macro _PROF_PROLOG which contains the code sequence needed
to call mcount(). This is needed because the ``link a6,#0'' insn used
trips up gcc's ANSI preprocessor (A # in a function-type macro must be
followed by a macro argument). _PROF_PROLOG is also used in the i386
asm.h.

Solaris' asm_linkage.h has a MCOUNT macro similar to _PROF_PROLOG
except it expands to different code sequences based on whether a
function is being compiled with "prof" or "gprof" instrumentation.

I also discovered that the m68k ALTENTRY is very different than the
implementation used by other NetBSD ports. Usually ALTENTRY simply
provides an alternate function entry point. The m68k version takes a
second argument and jumps inside the second function when profiling is
enabled. The m68k behavior is similar to the ENTRY2 macro found in
solaris.

Providing ENTRY2 and changing all the code that uses ALTENTRY to use
it would be a desirable change.

KERNEL -> _KERNEL

new RCS ID format.

Add RCSID macro; be sure ENTRY is in .text

so you can compile a kernel w/o using our hacked gas

Remove bogus \ that someone inserted.

GPROF --> PROF

Forgot the .even...

Fix typo.

Add .type directive.

Define ENTRY and ALTENTRY--hopefully for both STDC and K&R style...
Nabbed & mangled from sun3/include/asm.h and locore.s...

fix typos in word "access" and it derivatives, mainly in comments.

Remove 3rd and 4th clause on Leo Weppelman's license. OK leo@.

branches: 1.8.62;
gcc4 checks for and warns of matching constraints that don't specify
a register operand. Remove the matching constraint and change the output
operand constraint from "=m" (write-only) to "+m" (read-write).

Backout previous since there is an objection and I'm not a toolchain guy.

Fix "warning: matching constraint does not allow a register" on gcc4.
(I guess constraints "0-9" are valid only for register operands, right?)

branches: 1.5.4; 1.5.8; 1.5.16;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

branches: 1.4.32;
Fix asm constraints. Sun3 kernels built with the new toolchain boot now.

branches: 1.3.28; 1.3.32;
no semicolon, please

asm -> __asm__, volatile -> __volatile

branches: 1.1.14;
Add macro's that do bclr/bset in a single instruction.

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

branches: 1.3.8; 1.3.40; 1.3.52;
Optimize bswap16() and bswap32() functions to inline assembly.

branches: 1.2.2; 1.2.14;
Include <sys/bswap.h> for function prototypes. i386, pc532 and vax
still include <machine/byte_swap.h> and define macros for some of
the bswap*() functions.

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

Remove trailing spaces and TABs.

s/from from/from/ in comment.

dependant -> dependent

Remove clause 3 and 4 from TNF licenses

branches: 1.10.16; 1.10.18; 1.10.20;
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.

branches: 1.9.10;
Enable _pmap_set_page_cacheable(), _pmap_set_page_cacheinhibit() and
_pmap_page_is_cacheable() on all pmap_motorola.c ports and add
BUS_DMA_COHERENT support (from mvme68k) to common m68k bus_dma.c.

Tested with (not-yet-integrated) MI Sonic Ethernet driver on mac68k
http://mail-index.netbsd.org/port-mac68k/2007/06/07/0000.html
and ok'ed by thorpej.

branches: 1.8.2; 1.8.4; 1.8.10;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

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

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

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

XXX: bus_dma(9) needs an update still.

branches: 1.6.26;
merge ktrace-lwp.

branches: 1.5.4;
Add a dm_maxsegsz public member to bus_dmamap_t. This allows a user of the API
to select the maximum segment size for each bus_dmamap_load (up to the maxsegsz
supplied to bus_dmamap_create). dm_maxsegsz is reset to the value supplied to
bus_dmamap_create when the dmamap is unloaded.

branches: 1.4.4; 1.4.6;
De-__P

netbsd.org -> NetBSD.org

All "netbsd.org" is now gone from src/sys/arch.

branches: 1.2.2;
Introduce BUS_DMA_NOCACHE, and bus_dmamem_map() of i386 supports it.

branches: 1.1.2; 1.1.8;
bus_dma(9) pulled pretty much verbatim from next68k.

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: 1.11.68;
Merge riastradh-drm2 to HEAD.

Teach to use coldfire isac byterev if available, otherwise let the compiler
figure it since there is rorw instruction to fall back on.

branches: 1.9.34; 1.9.44; 1.9.50; 1.9.58;
Remove clause 3 and 4 from TNF licenses

branches: 1.8.72; 1.8.74; 1.8.76;
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: 1.7.2;
inline -> __inline

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

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

branches: 1.4.32;
convert from macros to static inlines. allen briggs confirms resultant code
is the same with -Ox, for x>0 (as expected).

branches: 1.3.2; 1.3.4; 1.3.10;
Remove '_KERNEL' conditionalizing. This break userland apps.
Noted by Steve Allan.

branches: 1.2.2;
This only works with data registers.

Optimize bswap16() and bswap32() functions to inline assembly.

fix PR 6724 - convert m68k options to defflag's. this means that
M680[12346] are now available from opt_m68k_arch.h. FPSP meantioned
in the PR has already been fixed, and i could not find any more.

i built these kernels to ensure i did not break their builds:

amiga: GENERIC DRACO
atari: HADES FALCON MILAN-PCIIDE
mac68k: GENERIC
sun2: GENERIC
sun3: GENERIC GENERIC3X
cesfic: attempted GENERIC, does not build due to lack of machine/bus.h
hp300: GENERIC
luna68k: GENERIC
mvme68k: GENERIC
news68k: GENERIC
next68k: GENERIC
x68k: GENERIC

branches: 1.15.20; 1.15.22;
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.

branches: 1.13.10;
Fix the 060 variants to not have conflicting definitions for the
cache ops common to 060 and 040. Also remove the now-redundant
definitions for the 060 variant which simply pointed to the 040
variants.
This fixes the build of the mvme68k VME172 kernel.

DCFA(), DCPA(), ICPL(), ICPP(), DCPL(), DCPP, DCFL(), and DCFP()
cache ops are identical between M68040 and M68060 and they are not
available on M68020 and M68030, so no need to check cputype even on
multi CPU kernels and they can always be inlined.

This improves MI Sonic xfer speed ~5%.
http://mail-index.netbsd.org/port-mac68k/2007/06/07/0003.html

branches: 1.11.30; 1.11.32; 1.11.38;
merge ktrace-lwp.

branches: 1.10.12;
De-__P

branches: 1.9.6;
finish conversion to the common m68k cacheops:
add support for machine-specific flavors of the ops for off-chip caches.
many thanks to Izumi Tsutsui for his help with this.

branches: 1.8.12;
Bug fixes for 68020only or 68030only machines, by Aymeric Vincent.

make DCIAS work for 020-only / 030-only kernels

branches: 1.6.2;
Add missing TBIA() definition for 68030-only machine.

Replace leftover vm_offset_t's by paddr_t or vaddr_t, as appropriate.
Rename variables/parameters from "va" to "pa" where they are a paddr_t.
Correct DCIAS to take a paddr_t (instead of vaddr_t).

#ifndef _M68K_CACHEOPS_H_ - #endif.

Nuke vm_offset_t/vm_size_t.

Add DCFA() definitions.

branches: 1.1.4;
An attempt to make a generic m68k implementation for cache control operations.
Not yet completely finished.

Remove clause 3 and 4 from TNF licenses

branches: 1.8.68; 1.8.70; 1.8.72;
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: 1.7.2; 1.7.4; 1.7.6;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

branches: 1.6.22;
use "static __inline" instead of "extern __inline" so that we can
build without optimization.

branches: 1.5.12;
Add register prefixes.

branches: 1.4.12; 1.4.14; 1.4.18;
Nuke vm_offset_t/vm_size_t.

inline -> __inline

branches: 1.2.2;
Correct TBIS_20 parameters, add DCFA/DCPA defines for the 020/030 (From
Ignatios).

branches: 1.1.4;
An attempt to make a generic m68k implementation for cache control operations.
Not yet completely finished.

Remove trailing spaces and TABs.

Remove clause 3 and 4 from TNF licenses

branches: 1.8.68; 1.8.70; 1.8.72;
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: 1.7.2; 1.7.4; 1.7.6;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

branches: 1.6.22;
use "static __inline" instead of "extern __inline" so that we can
build without optimization.

branches: 1.5.12;
Add register prefixes.

branches: 1.4.12; 1.4.14; 1.4.18;
Nuke vm_offset_t/vm_size_t.

inline -> __inline

branches: 1.2.2;
Correct TBIS_20 parameters, add DCFA/DCPA defines for the 020/030 (From
Ignatios).

branches: 1.1.4;
An attempt to make a generic m68k implementation for cache control operations.
Not yet completely finished.

Re-factor the 680x0 Function Code definitions into their own
separate file (as was done on the sun2/sun3 ports ages ago)
and switch everyone to the common header.

Remove clause 3 and 4 from TNF licenses

branches: 1.10.16; 1.10.18; 1.10.20;
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.

branches: 1.9.10;
Use pointers for variables assigned to %a0 by __asm("%a0") so that
gcc may generate silightly better inlined code on optimization.

branches: 1.8.24; 1.8.26; 1.8.32;
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: 1.7.2; 1.7.4; 1.7.6;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

branches: 1.6.22;
use "static __inline" instead of "extern __inline" so that we can
build without optimization.

branches: 1.5.12;
Add register prefixes.

branches: 1.4.2; 1.4.4; 1.4.8;
Replace leftover vm_offset_t's by paddr_t or vaddr_t, as appropriate.
Rename variables/parameters from "va" to "pa" where they are a paddr_t.
Correct DCIAS to take a paddr_t (instead of vaddr_t).

Nuke vm_offset_t/vm_size_t.

inline -> __inline

branches: 1.1.8;
An attempt to make a generic m68k implementation for cache control operations.
Not yet completely finished.

Re-factor the 680x0 Function Code definitions into their own
separate file (as was done on the sun2/sun3 ports ages ago)
and switch everyone to the common header.

TAB/space cleanup.

Remove clause 3 and 4 from TNF licenses

branches: 1.12.16; 1.12.18; 1.12.20;
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.

branches: 1.11.10;
Revert last commit to this file, and re-introduce the _60 variants
of the cache ops macros which are common between 040 and 060, as
per discussion with tsutsui@.

Fix the 060 variants to not have conflicting definitions for the
cache ops common to 060 and 040. Also remove the now-redundant
definitions for the 060 variant which simply pointed to the 040
variants.
This fixes the build of the mvme68k VME172 kernel.

Use pointers for variables assigned to %a0 by __asm("%a0") so that
gcc may generate silightly better inlined code on optimization.

DCFA(), DCPA(), ICPL(), ICPP(), DCPL(), DCPP, DCFL(), and DCFP()
cache ops are identical between M68040 and M68060 and they are not
available on M68020 and M68030, so no need to check cputype even on
multi CPU kernels and they can always be inlined.

This improves MI Sonic xfer speed ~5%.
http://mail-index.netbsd.org/port-mac68k/2007/06/07/0003.html

branches: 1.7.24; 1.7.26; 1.7.32;
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: 1.6.2; 1.6.4; 1.6.6;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

branches: 1.5.22;
use "static __inline" instead of "extern __inline" so that we can
build without optimization.

branches: 1.4.12;
Add register prefixes.

branches: 1.3.12; 1.3.14; 1.3.18;
Nuke vm_offset_t/vm_size_t.

inline -> __inline

branches: 1.1.8;
An attempt to make a generic m68k implementation for cache control operations.
Not yet completely finished.

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

branches: 1.6.182; 1.6.186;
Garbage-collect.

Sync it with the i386 version so lint doesn't complains about an syntax
error for __warn_references.

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".

Define a CPU_BROKEN_RMC machdep sysctl that returns a bool indicating
if the system has non-working /RMC logic (and that instructions that
assert the /RMC signal, such as TAS and CASx, should be avoided).

Define the fields in the 68060 Processor Configuration Register.

Fix up the mac68k interrupt handlers to work with the new style common
clockframe layout and remove the CLOCK_FORMAT0 work-around. As a nice
side-effect, this also eliminates the super-sketchy stack unwinding used
by rtclock_intr to get at the interrupt stack frame.

Use proper clockframe size for those platforms that require it.

XXX This is a tempory measure, better to fix clock interrupts to take the
common clockframe size.

OK thorpej@.

What good are comments, really, if you can't have a little color? Add
a note above CLKF_INTR() about why NetBSD will likely never switch to
using the "master" stack for the kernel, and thus why the not-enabled
version of CLKF_INTR() will never be enabled.

(Adding the comment here, rather than just deleting the code, has value,
I think, for future retrocomputing archeologists.)

Largely unify the <machine/cpu.h> headers on the m68k platforms.

Remove a comment that is no longer applicable.

Make the M68K_MMU_* defines real kernel options, available in opt_m68k_arch.h.
For 68030, 68040, and 68060, infer M68K_MMU_MOTOROLA. For 68010 and 68020, it
must be an explicit option (set in std.${MACHINE} or, in the case of hp300,
inferred from the specific model option).

G/C some bit defs that are redundant with mmu_{51,40}.h

Re-factor the 680x0 Function Code definitions into their own
separate file (as was done on the sun2/sun3 ports ages ago)
and switch everyone to the common header.

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.

- 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: 1.15.52; 1.15.54;
Move CACHELINE_* from bus_dma.c to cpu.h (needed for PCI configuration on amiga port).

Remove clause 3 (UCB advertising clause) from the University of Utah
copyright. Confirmed by Mike Hibler, mike at cs.utah.edu - thanks!
Also, merge UCB and Utah copyright texts back into one, as they
originally were.

Extra verification by snj@.

branches: 1.13.2; 1.13.4;
Protect the include of <sys/cpu_data.h> with a test for either _KERNEL
or _KMEMUSER. This should fix the build problem in libkvm for our m68k
ports.

Collect cpu_info and friends and move to m68k/include/cpu.h
Add a define __HAVE_CPU_DATA_FIRST which means that cpu_data is the first
member in struct cpu_info.

branches: 1.11.100;
merge ktrace-lwp.

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

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

branches: 1.9.2;
Merge the nathanw_sa branch.

"definitions" has lots of 'i's, but that's not reason to leave one out.

branches: 1.7.2; 1.7.8;
Don't need to prototype child_return() here, it's in <sys/proc.h>.

branches: 1.6.2;
Unification of the m68k syscall() function.

branches: 1.5.14;
Move the (boiled down) interface declarations into m68k.h
Too late for the release, unfortunately...

Prototype regdump().

prototype mappedcopy{in,out}(), {copy,zero}page().

Add an FPU_UNKNOWN constant; just a placeholder for any unknown FPU.

Factor out common Motorola 68k CPU definitions from the m68k port
cpu.h header files.

Some more work could be done here, but it's a good start.

TAB/space cleanup.

Remove trailing spaces and TABs.

s/expecially/especially/ in comment.

move the __packed attribute from struct frame::F_t into the single
unaligned member inside. CTASSERT() the size is unchanged.

with this, sun3 and GCC 9 appears to work.

remove f_pad, conflicts with new <sys/file.h> define.

branches: 1.5.14; 1.5.32;
Remove clause 3 (UCB advertising clause) from the University of Utah
copyright. Confirmed by Mike Hibler, mike at cs.utah.edu - thanks!
Also, merge UCB and Utah copyright texts back into one, as they
originally were.

Extra verification by snj@.

branches: 1.4.100; 1.4.106; 1.4.108;
merge ktrace-lwp.

branches: 1.3.4;
appease lint's ``warning: nonportable bit-field type'' in MD header

move #defines back to frame.h

SA_SIGINFO support for m68k

TAB/space cleanup.

Remove trailing spaces and TABs.

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.

The XXX comment (do not pull in the uvm headers) might have been a nice idea
at the time, but now all other db_machdep files do this, so we follow suit.

branches: 1.31.6;
Enable build of crash(8) for m86k platforms.

branches: 1.30.4; 1.30.8;
Introduce DDB_EXPR_FMT and replace the logic around DB_EXPR_T_IS_QUAD.

obsolete DB_AOUT_SYMBOLS. however, we need to leave most of the code
in db_sym.[ch] as it is used by the elf version of crash(8).

i will be cleaning up the db_sym.c code in a follow up commit to avoid
having dead code compiled.

branches: 1.28.2;
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: 1.27.88;
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: 1.26.4; 1.26.6; 1.26.8; 1.26.10; 1.26.12;
merge ktrace-lwp.

branches: 1.25.12;
- De-__P.
- Also define DB_ELF_SYMBOLS and DB_ELFSIZE.

branches: 1.24.2;
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.

Remove unneeded cast that prevents PC_REGS from being used as lvalue.

<vm/vm_param.h> -> <uvm/uvm_param.h>

branches: 1.21.12;
Nuke vm_offset_t/vm_size_t.

#define DB_AOUT_SYMBOLS

Remove some unnecessary <vm/*> headers. Have to keep <vm/vm_param.h>,
at least until boolean_t moves to <sys/types.h> or someplace...
Also make ddb_regs extern here. Closes PR#3213

Add kgdb_reg_t, KGDB_NUMREGS, KGDB_BUFLEN

branches: 1.17.2;
FIXUP_PC_AFTER_BREAK now takes an arg of type db_regs_t *

db_expr_t is now a long.

Include <machine/frame.h> and typedef db_regs_t using struct trapframe
(instead of replicating trapframe here by a different name). Update the
macros that refer to members of db_regs_t to use the trapframe members.

Use db_regs_t instead of struct mc68020_saved_state

branches: 1.13.2;
Prototype + -Wall fixes.

new RCS ID format.

Remove BYTE_MSF.

Merge with 4.4-Lite.

vm/queue.h doesn't exist any more.

Specify the byte order.

Fix some bogus spacing.

Add some padding before SR.

T_WATCHPOINT doesn't really exist. Deal.

Alias T_TRAP15 to T_BREAKPOINT globally.

kill logs, and minor cleanup

fixed problem that caused two consecutive segments to be using the same
pmeg unknowingly. still too many printfs, not sure how many are actualy
in the machine dependent code. reaches cpu_startup() where it stops
deliberately. next project: autoconfig(), maybe kgdb

various changes

m68k/elf_machdep.h: organize symbols into psABI & 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.

branches: 1.8.22;
Add TLS relocation definitions.

branches: 1.7.122;
Define EF_CPU32 and EF_M68000.

Add support for dumping ELF-cormat core files.

branches: 1.5.8; 1.5.12;
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.

fix typo: s/EM_68k/EM_68K/

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

branches: 1.2.14; 1.2.16; 1.2.18;
Add m68k relocation types.

Basic elf_machdep.h for m68k; doesn't include relocations, yet.

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

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

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

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

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

(Always) (practice) (safe) (macro expansion).

branches: 1.11.4;
Add byte-swapping functions (bswap16, bswap32, bswap64) to libkern.
Only assembly version for i386 bswap16 and bswap32 for now (bswap64 uses
bswap32). Contribution of assembly versions of these are welcome.
Add byte-swapping of ext2fs metadata for big-endian systems.
Tested on i386 and sparc.

branches: 1.10.10;
use in_addr_t and in_port_t

Back out previous; this is a bigger problem than I expected.

The htonl(), htons(), etc. functions return u_long and u_short. Add
casts to the big-endian versions of these calls so that the compiler
won't complain when they're passed as arguments to printf().

Make NTOH[SL] and HTON[SL] (void) (x) instead of (x) to get around
compiler warnings. Followed the lead set in the sparc port.

new RCS ID format.

protect against multiple inclusion

Add quad stuff, etc.

get rid of #ifndef KERNEL around inclusion of cdefs.h

add rcsids to everything and clean up headers

add from net/2 sources. was symlink to ../../tahoe/include/endian.h

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

moved to aout_machdep.h (via repository copy)

All of the m68k ports' exec.h's were essentially the same. Merge them.

Override the N_PAGSIZ() macro; this one checks the MID of the executable
and returns the appropriate page size.

Add setdfc() and setsfc() inlines.

Make getsfc() and getdfc() inlines; it's slightly smaller.

Re-factor the 680x0 Function Code definitions into their own
separate file (as was done on the sun2/sun3 ports ages ago)
and switch everyone to the common header.

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: 1.9.6;
Remove trailing spaces and TABs.

disable -Wshadow because in c99 mode these get marked as builtins.

branches: 1.7.2; 1.7.6;
The __fgetenv() macro operates on a fenv_t, not on a fenv_t *.
Fixes a segfault in fegetenv() and feholdexcept().

branches: 1.6.6;
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().

use FPCR instead of FPSR to manipulate the exception mask.

branches: 1.4.2; 1.4.4;
Fix #endif; it should be after __END_DECLS

This unbreaks the build of sun2.

disable code that does not work for sun2/coldfire

branches: 1.2.2;
make this compile for c++

fenv for m68k

Get the constants right for m68k softfloat.

Now the libm test results are 0 failures, 1 expected failure.

x86, m68k <machine/float.h>: `Significand', not `mantissa'.

The IEEE 754 standard uses `significand' and has since its first
edition in 1985; Kahan and Knuth both use `significand' and
explicitly reject `mantissa'; `significand' doesn't have a
conflicting definition in logarithms; and in actual usage in the
floating-point and numerical analysis literature, `significand'
dominates.

No functional change intended -- comment-only.

Increase LDL_MIN_EXP for softfloat.

An exponent of zero(-16382) has special signifiance for softfloat.

Found by atf-tests testing exponent values lower than the possible minimum.

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: 1.23.2;
{m68k,x86}/float.h: fix cross references

{x86,m68k}/float.h: document LDBL_MIN behavior

It seems that even though both these platforms have 12-byte floats
that are pretty much the same representation and both allegedly
IEEE-compliant, they manifest the top bit of the mantissa and then
differ slightly in the behavior of the extra encodings this permits.

Thanks to riastradh@ for helping sort this out.

Merge riastradh-drm2 to HEAD.

Coldfire FPU looks like the 68010 FPU (no long double)

branches: 1.19.112; 1.19.122; 1.19.128; 1.19.136;
merge ktrace-lwp.

Hide the extended-precision definitions from __mc68010__.

* Move the definitions for types other than single-precision and double-
precision back to machine-dependent headers. C99 has no strict
requirement which, if any, extended-precision type `long double' must
match, and even between 80-bit formats there are differences in
implementation (m68k vs. x86).
* On arm, consider __VFP_FP__.

branches: 1.16.2;
Rename <sys/float_ieee.h> to <sys/float_ieee754.h>, following libc's
convention for these.

Use <sys/float_ieee.h> rather than <sys/math_ieee.h>, which doesn't exist.

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

The smallest positive normalized number in extended precision is 2^-16383.
Underflow handling is different from i387.

Include correct information for long doubles (mc68881 extended precision).

Prototype __flt_rounds() consistently.

branches: 1.10.18;
Wrap with #ifndef _XXX_FLOAT_H_/#define _XXX_FLOAT_H_/ ... /#endif.

#include <sys/cdefs.h>.
Wrap __flt_rounds() declaration with __BEGIN_DECLS/__END_DECLS.

Changed FLT_ROUNDS from constant to a call to __flt_rounds(), so that the
current rounding mode is accurately reported.

new RCS ID format.

Someone made a typo.

protect against multiple inclusion

Adjust DBL_MIN so it doesn't underflow.

Adjust DBL_MAX so it doesn't overflow.

add rcsids to everything and clean up headers

branches: 1.1.1;
Initial revision

Merge riastradh-drm2 to HEAD.

Fix some definitions

branches: 1.1.2; 1.1.6; 1.1.8; 1.1.20; 1.1.30; 1.1.34; 1.1.42;
Move FPSR_ register bit definitions into their own file

Introduce __HAVE_M68K_BROKEN_RMC, which can be defined by m68k platforms
that cannot perform indivisible READ-MODIFY-WRITE bus cycles. The
define is named for the /RMC output signal on the CPU that is asserted
when such a cycle is performed. These cycles are only used by the CAS,
CAS2, and TAS instructions. The cycles are, as far as I can tell,
otherwise indistinguishable from garden-variety read followed by write
bus cycles, except for the assertion of /RMC. Note that other single-
instruction "read-modify-write" instructions (e.g. OR, AND, ADD, etc.
with a memory destination operand) do not assert /RMC, and are thus not
considered truly atomic from the perspective of the 68k architecture.

When __HAVE_M68K_BROKEN_RMC is defined, then we must make unavailable
the CAS, CAS2, and TAS instructions, because using them will typically
cause a bus error to occur. In this case, we handle _atomic_cas_32()
(and its aliases) in the kernel environment the same way as the 68010
does: a restartable atomic sequence. 8- and 16-bit CAS operations are
not available in the kernel environment on such platforms.

We define __HAVE_M68K_BROKEN_RMC for the hp300 platform because 68020-based
hp300 systems will generate a fault for /RMC-type cycles.

Based on work by Izumi Tsutsui.

XXX pullup-11?

G/C some unused definitions.

We only need one copy of getvbr() and setvbr().

TAB/space cleanup.

Remove trailing spaces and TABs.

Refactor the 68040 writeback() from each m68k port's trap handler into a
shared copy: m68040_writeback(). It is essentially a copy of the Atari
version, with some minor cosmetic tweaks and one small performance optimization
from the mvme68k port.

Tested by rjs@ on a Quadra 950. (Thanks!)

branches: 1.30.56;
Remove clause 3 (UCB advertising clause) from the University of Utah
copyright. Confirmed by Mike Hibler, mike at cs.utah.edu - thanks!
Also, merge UCB and Utah copyright texts back into one, as they
originally were.

Extra verification by snj@.

branches: 1.29.26; 1.29.32; 1.29.34;
Use generic atomic_cas_uint() for mutex(9) and rwlock(9), and
remodel old RAS based _lock_cas() implementation for m68010
into genereic atomic_cas_32().
Now sun2 kernel compiles and even works on multiuser. (hehe)

Tested on tme (emulationg 2/120 and 3/150) and (real) 3/80.

branches: 1.28.36;
LOCK_CAS_CHECK(): make sure we're in kernel mode.

branches: 1.27.2;
- Define LOCK_CAS_CHECK() in m68k/frame.h (there because it operates on
a clockframe).
- Call LOCK_CAS_CHECK() in clock_intr() (noted by Izumi Tsutsui).

branches: 1.26.26; 1.26.30;
merge ktrace-lwp.

namespace sanity: don't expose compatibility sigcontext stuff
unnecessarily

branches: 1.24.10; 1.24.12; 1.24.14;
De-__P

constify siginfo/trapsignal

move #defines back to frame.h

SA_SIGINFO support for m68k

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

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

branches: 1.19.2;
Merge the nathanw_sa branch.

branches: 1.18.6;
Added the crucial "packed" attribute to the type 8 frame structure.

branches: 1.17.2;
Added support for the 68010 bus error frame.

branches: 1.16.2; 1.16.14;
Move linux_reenter_syscall() to a common location and rename it to
reenter_syscall() - it's going to be shared with COMPAT_SVR4 and soon be
used by native code.

branches: 1.15.18;
Oops; put the __attribute__ in the right place.

Make sure struct trapframe is packed tightly.

Protect this agains multiple includes so it can be included by db_machdep.h

3 more constants for 68060 access error trap stack frames.

M68060 additional frame formats and bits. Closes PR 1174.

This shouldn't break anything; I find ... grep ... all the relevant
kernel sources subdirecotry trees I could think of for the defines
that don't use the new FSLW or FPF6 prefix. But in case it does anyway,
tell me immediately.

Redefine the first part of struct frame to be a struct trapframe, and add a
struct switchframe.

add stdframe (4-word frame)

new RCS ID format.

Add RCS ids.

Merge with 4.4-Lite.

protect against multiple inclusion

Add support for 68040 frames and flag bits.

Add RCS identifiers (this time on the correct side of the branch), and
incorporate recent changes in netbsd-0-9 branch.

add rcsids to everything and clean up headers

branches: 1.1.1;
Initial revision

use uint32_t like the x86 file does.

branches: 1.17.2;

Add multiple inclusion protection guard - the long double math routines
have a tendency to sometimes make that happen.

This seems to fix the sun3 build, and probably other m68k builds which
were working before the libm upgrades (it will do nothing for any that
were failing before that).

cargo cult the x86 changes.

branches: 1.15.46; 1.15.66; 1.15.68;
Extract extended precision fraction correctly. Now gdtoa works properly
on m68k for extended precision numbers.

Whitespace

From Christos: gdtoa fixes for m68k. M68k ports should build now, but
printing extended precision is a little off.

branches: 1.12.24; 1.12.26;
merge ktrace-lwp.

branches: 1.11.2;
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: 1.10.8; 1.10.14;
Similar to sparc, make available the extended-precision definitions for
_KERNEL; the FPE package will require it once it's used on sun2.

Err, rename some members added in previous to make them reflect their
semantics better.

For convenient use in libc, add unions of the C floating types and their
corresponding structure definitions.

Correct the position of the QUIETNAN bit.

Use <sys/ieee754.h> where applicable.

Hide the extended-precision definitions from __mc68010__.

Account separately for the explicit integer bit in extended-precision
format, due to its role in denormal representation; inspired by communication
with Charles Hannum.

Make struct ieee_ext actually match the layout of m68k extended-precision.

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

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

branches: 1.1.2; 1.1.52;
PowerPC port

Remove trailing spaces and TABs.

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().

the FP_* constants need to be different from the new FE_* constants
to preserve the ABI, so shift them as needed when using them.

branches: 1.8.2; 1.8.4;
get rid of dup fenv.

branches: 1.7.24; 1.7.42;
The FE_* constants are used verbatim to set the RND field in the FPCR
register - so FE_UPWARD needs to be 3 and FE_DOWNWARD 2 - otherwise
our libc code for fpsetround(), fpgetround() and __flt_rounds() would
need to be adjust (and become slower). This fixes a failure in the
lib/libc/ieeefp/round regression test.

OK: matt

branches: 1.6.2; 1.6.4;
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: 1.5.74; 1.5.78; 1.5.80; 1.5.84;
merge ktrace-lwp.

De-__P

branches: 1.3.48;
RCSID Police.

Shift the bit positions.

Move fp_except and fp_rnd definitions to machine/include.

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

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

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

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

Revert previous (SCN*FAST*) and make PRI*FAST* identical.
Should fix the default (gcc 4.5 based) build.

Fix the SCN*FAST* defines

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

branches: 1.3.44;
Remove clause 3 and 4 from TNF licenses

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

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

Remove trailing spaces and TABs.

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

branches: 1.7.44;
Remove clause 3 and 4 from TNF licenses

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

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

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

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

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

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

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

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

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

Fix editor mishap

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

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

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

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

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

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

branches: 1.9.122;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

signed -> __signed

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

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

branches: 1.5.8; 1.5.24;
* 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.

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

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

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

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

s/sharable/shareable in comments and documentation.

Now that we've agreed on the name "intr_depth", let's agree on the type, too.

Consistently use "intr_depth" as the name of the interrupt depth counter
on m68k platforms.

Add _KERNEL guards around most of the definitions in these files.

- Declare idepth as volatile.
- Provide a m68k_intrvec_intrhand() routine that returns the interrupt
handle for a given vectored interrupt. XXX This is gross and should
burn to the ground, but is needed to support legacy ISR interfaces.

Provide a m68k_count_intr() macro that hides the details of how interrupts
are counted, and also ensures that ci_data.cpu_nintr is incremented.

Use evcnt to count interrupts for the non-__HAVE_LEGACY_INTRCNT case.

Add the "ISR priority" notion that's used on some m68k platforms:

/*
* Some devices are particularly sensitive to interrupt
* handling latency. Unbuffered serial ports, for example,
* can lose data if their interrupts aren't handled with
* reasonable speed. For this reason, we sort interrupt
* handlers by an abstract "ISR" priority, inserting higher-
* priority interrupts before lower-priority interrupts.
*/

(...within the same shared auto-vectored interrupt list.)

Add a common m68k interrupt dispatch implementation.

Add reloc and relocend fields to the gen68k kcore header, as well.

No compatibility issue, since libkvm does not yet read this format.

Introduce a new "gen68k" kcore type for m68k that describes the MMU
configuration in terms of the MMU configuration registers, not in terms
of the PTE bits. The rest is left as an exercise for userland.

fix typo

Use proper uintNN_t integer types.

Remove clause 3 and 4 from TNF licenses

branches: 1.4.8; 1.4.126; 1.4.128; 1.4.130;
Added support for kernel cores on the sun2. This
increases sizeof(struct cpu_kcore_hdr).

branches: 1.3.34;
Remove unused part of sun3_kcore_hdr.

New kcore.h for m68k, includes all possible m68k formats in a self-describing
layout, facilitating sharing libkvm on all m68ks.

NOTE: This changes the crash dump format of all m68k ports that use the
new libkvm!

Add the include files and the atari kernel support for new format panic
dumps.

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

branches: 1.23.26; 1.23.28;
Since all our compilers support __DBL_* and __FLT_*, use them to define
{DBL,FLT}_{DIG,MIN,MAX}

branches: 1.22.4; 1.22.8;
add missing SSIZE_MIN

branches: 1.21.2;
- Normalize inclusion protection (remove)
- Move CHAR_{MIN,MAX} to a common file.
- Fix broken comments

branches: 1.20.8; 1.20.12;
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: 1.19.20; 1.19.40; 1.19.42;
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: 1.17.30; 1.17.38; 1.17.44; 1.17.48; 1.17.50;
merge ktrace-lwp.

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

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

branches: 1.15.2;
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: 1.14.8;
Be consistent with limit constants:
- use "U" suffix for unsigned constants
- use "L" suffix for long constants
- use "UL" suffix for unsigned long constants
- use hexadecimal instead of decimal

Fixes build problems with vi (now that warnings/errors are enabled) on
mips, powerpc and arm platforms.

branches: 1.13.2;
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: 1.12.2; 1.12.4;
Define ISO C99 (unsigned) long long (min, max) symbols.

branches: 1.11.12;
_POSIX_SOURCE -> _POSIX_C_SOURCE

multiple include protect machine/limits.h, fixes pr 4473 (from Mika Nystrom)

new RCS ID format.

Add constants required by XPG3

Add SSIZE_MAX and SIZE_T_MAX, also fix other broken values.

protect against multiple inclusion

Make sure min values are correct when used at a larger size.

Add quad support.

Removed CLK_TCK, it's value is not machine dependant.
It's supposed to be defined in <time.h>, not <limits.h> anyway.

add rcsids to everything and clean up headers

add from net2. were symlinks to ../../vax/include/*

Slight tweak to previous: always use TAS on 68010.

Adjust __cpu_simple_lock{,_try}() to work in an environment where the
TAS instruction cannot be used by using _atomic_cas_8():
- For the _KERNEL case, if __HAVE_M68K_BROKEN_RMC is defined. This will
result in an _atomic_cas_8() that is implmented in terms of _atomic_cas_32(),
which in turn is implemented in lock_stubs.s as restartable atomic sequence.
- For the non-_KERNEL case. This will result in use of an _atomic_cas_8()
that is appropriate for system as determined at run-time (well, compile-
time for 68010).

m68k: __cpu_simple_unlock audit.

- Use `cc' clobbers in asm volatile because they touch the condition
codes.

- Use `memory' clobbers in asm volatile so the compiler doesn't move
up loads and stores in the critical section at _other_ addresses
than the lock so they happen before __cpu_simple_lock or
__cpu_simple_lock_try.

- Not sure if we have any (or if there even are any?) multicore m68k
systems out there, but __cpu_simple_unlock needs __insn_barrier
either way so the compiler doesn't delay loads and stores prior to
__cpu_simple_unlock so they happen after it.

Nix mb_* on m68k.

branches: 1.15.4;
more const.

branches: 1.14.44;
Remove clause 3 and 4 from TNF licenses

branches: 1.13.16; 1.13.18; 1.13.20;
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: 1.11.6; 1.11.14; 1.11.18; 1.11.22; 1.11.24;
Merge newlock2 to head.

__unused removal on arguments; approved by core.

branches: 1.9.20; 1.9.22;
inline -> __inline

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

merge ktrace-lwp.

branches: 1.6.12;
De-__P

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: 1.4.2;
Merge the nathanw_sa branch.

branches: 1.3.6; 1.3.14;
On the m68k, the most efficient type for __cpu_simple_lock_t is
an unsigned char, since that is what the `tas' instruction uses.

While I'm here, implement the __cpu_simple_lock family of routines.
Why? One, because they're easy. Two, so Steve can get master/slave
MVME systems talking across the backplane. :-)

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>.

Undo previous lwp.h change.

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

branches: 1.1.2;
file lwp.h was initially added on branch nathanw_sa.

branches: 1.2.4;
Shuffle code so it compiles

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.

Add a note about how asm code relies on the ordering of the MMU_*
constants.

Make getsfc() and getdfc() inlines; it's slightly smaller.

TAB/space cleanup.

Remove trailing spaces and TABs.

Overhaul the API used to fetch and store individual memory cells in
userspace. The old fetch(9) and store(9) APIs (fubyte(), fuword(),
subyte(), suword(), etc.) are retired and replaced with new ufetch(9)
and ustore(9) APIs that can return proper error codes, etc. and are
implemented consistently across all platforms. The interrupt-safe
variants are no longer supported (and several of the existing attempts
at fuswintr(), etc. were buggy and not actually interrupt-safe).

Also augmement the ucas(9) API, making it consistently available on
all plaforms, supporting uniprocessor and multiprocessor systems, even
those that do not have CAS or LL/SC primitives.

Welcome to NetBSD 8.99.37.

G/C "MAPPECOPY". It is the deadest of wood, and never actually worked in
NetBSD.

branches: 1.22.40;
Remove COMPAT_SA / KERN_SA. Welcome to 6.99.3!
Approved by core@.

Adjust for function merge and move.

branches: 1.20.4;
Merge copy-and-pasted fpu_probe() function (to share it among more m68k ports).
Tested on TT030, Sun3/80, and X68030.

branches: 1.19.4;
- merge and move pasted m68k MD setreg() functions into m68k/m68k_machdep.c
- move m68881_save() and m68881_restore() declarations into <m68k/m68k.h>

Briefly tested and no obvious breakage on atari, sun3, and x68k.

Remove clause 3 (UCB advertising clause) from the University of Utah
copyright. Confirmed by Mike Hibler, mike at cs.utah.edu - thanks!
Also, merge UCB and Utah copyright texts back into one, as they
originally were.

Extra verification by snj@.

branches: 1.17.2; 1.17.4;
implement ucas_* for m68k.

branches: 1.16.2; 1.16.4;
Move declaration of setfunc_trampoline() into <m68k/m68k.h>.