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: 1.13.36;
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: 1.12.16; 1.12.18;
fenv(3) support for hppa

branches: 1.11.4; 1.11.6;
Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

branches: 1.10.2; 1.10.12; 1.10.16;
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.

G/C hp{pa,700}/spinlock.h

branches: 1.7.4;
don't install <machine/db_machdep.h>, this is kernel only

branches: 1.6.4; 1.6.8;
merge ktrace-lwp.

branches: 1.5.12;
Factor out W{CHAR,INT}_{MAX,MIN} into their own header file.

Install <hppa/mcontext.h>

branches: 1.3.6;
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: 1.1.2; 1.1.4;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

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: 1.14.18;
Make clock_t unsigned int everywhere.
Ok: matt@, mrg@

branches: 1.13.12; 1.13.28; 1.13.30;
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: 1.11.4; 1.11.6;
merge christos-time_t

branches: 1.10.2; 1.10.6; 1.10.14;
Remove unused _BSD_OFF_T_.

branches: 1.9.16;
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: 1.7.8; 1.7.16; 1.7.22; 1.7.26; 1.7.28;
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: 1.6.20; 1.6.22;
merge ktrace-lwp.

branches: 1.5.6;
Modernise these to use GCC __builtin_* functions and types.

Also provide a (protected) va_copy.

branches: 1.4.8; 1.4.10;
Change headers to comply with the new toolchain changes.

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

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

branches: 1.2.2;
add some ISO C 1995 I18N functions and types:
btowc, wctrans, towctrans, wcscoll, wcsxfrm, wctype_t and wctrans_t.

branches: 1.1.2; 1.1.4;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Trailing whitespace

branches: 1.2.198;
Rename __LDPGSZ to AOUT_LDPGSZ, to accurately reflect what it is.

branches: 1.1.2; 1.1.4;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

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: hppa/asm.h: Respect _NETBSD_REVISIONID.

branches: 1.18.10;
delay slot indentation

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

branches: 1.16.10;
Trailing whitespace

branches: 1.15.30;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

Put some common entry stuff into _ENTRY and use it.

branches: 1.13.4; 1.13.14; 1.13.18;
Put RCSIDs in section .ident. (use .pushsection/.popsection)

branches: 1.12.2; 1.12.4;
Consistently use .gnu.warning with .pushsectio and .popsection on all
architectures instead of obsolete STABS frames for linker warnings.

branches: 1.11.2;
Fix and use the BSS macro.

branches: 1.10.14;
Define _ASM_LS_CHAR as '!' on hppa.

branches: 1.9.14; 1.9.18; 1.9.20; 1.9.24;
Provide a _C_LABEL

Fix kernel profiling on HPPA.

- stop gcc emitting stuff that HPUX requires
- don't use splhigh() in MCOUNT_ENTER as a call to _mcount will be
generated at the moment. Disable interrupts in hardware instead.
- Fix _PROF_PROLOGUE to save/restore all the register args when calling
_mcount.
- Fixup LEAF_ENTRY to dtrt (I think) in the GPROF case.
- Provide LEAF_ENTRY_NOPROFILE and sprinkle its use where i) profiling
causes problems, e.g. trap handlers, and ii) where it just doesn't
make sense, e.g. start.

branches: 1.7.12; 1.7.14; 1.7.18; 1.7.20;
Improve EXIT and add a BSS macro. From OpenBSD.

Implement WARN_REFERENCES.

branches: 1.6.24; 1.6.28; 1.6.30;
Add a STRONG_ALIAS macro

branches: 1.5.2;
merge ktrace-lwp.

branches: 1.4.12;
add hppa support for RAS, context stuff, siginfo and scheduler activations:
- add a RAS hook in cpu_switch().
- fill in the definition of struct mcontext.
- implement cpu_upcall(), cpu_getmcontext(), cpu_getmcontext() and
cpu_switchto().
- for now, force the right priviledge bits and space regs in setcontext().
- use correct values for __SIMPLELOCK_*.
- move the user stack to start at a multiple of the pthread stack size
so that libpthread can use the sp-masking trick.

Change headers to comply with the new toolchain changes.

branches: 1.2.2; 1.2.8;
Add ENTRY_NOPROFILE().

branches: 1.1.2;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

dumpconf(void) long doesn't exist, remove the prototype

PR kern/39714 by Henning Petersen

branches: 1.1.4; 1.1.6; 1.1.10; 1.1.12;
Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

branches: 1.1.4; 1.1.6; 1.1.10;
Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

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: 1.1.2; 1.1.4; 1.1.26; 1.1.38;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

add missing bus_space_*_stream() methods instead of quietly aliasing them
to their potentially byte-swapping regular counterparts

ok skrll@

branches: 1.2.26;
Provide PRIxBUSADDR, PRIxBUSSIZE, PRIuBUSSIZE, and PRIxBSH for all arches
to follow arm and (generic) mips.

Reviewed by christos.

branches: 1.1.4; 1.1.6; 1.1.10; 1.1.36;
Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

add missing bus_space_*_stream() methods instead of quietly aliasing them
to their potentially byte-swapping regular counterparts

ok skrll@

branches: 1.1.4; 1.1.6; 1.1.10; 1.1.66;
Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

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: 1.8.102;
Merge nick-hppapmap.

This is a port of the OpenBSD pmap and trap handling code to get us

- Performance boost on some/all machines.
- Well on the way to PA2.0 (in 32bit mode) support. Several
machines probe hardware, but fail sometime after interrupts
are enabled.

Other things changed / fixed on the branch are

- update autoconf to use the OpenBSD code.
- com @ dino is very close to being supported.
- HPPA_REDZONE has been replaced with a working redzone which
is enabled with DIAGNOSTIC.
- UPAGES has been halved in size.
- power(4) from OpenBSD to fix a few bugs.
- updated list of modules from OpenBSD.
- initial ports of uturn(4), astro(4) and elroy(4).
- update some copyrights (remove advertising clause, etc.)

Thanks to mjf for some of the above, testing and listening.

branches: 1.7.74; 1.7.82; 1.7.88;
Use uint32_t and uint16_t not in_addr_t and in_port_t

branches: 1.6.2;
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: 1.5.2;
inline -> __inline

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

merge ktrace-lwp.

branches: 1.2.16;
Change headers to comply with the new toolchain changes.

branches: 1.1.2; 1.1.4; 1.1.10;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Make all __ALIGNBYTES macros return the same type (size_t)

branches: 1.2.6; 1.2.10;
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: 1.1.2; 1.1.4; 1.1.150; 1.1.154;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

hppa: Add missing barriers in cpu_switchto.

PR kern/57240

Not sure hppa has ever had working MULTIPROCESSOR, so maybe no
pullups needed?

branches: 1.12.4;
In order to prevent _mcount() from being recursively called when built with COPTS=-O0,
sprinkle `__always_inline' to make _mcount() be generated as a single function.

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

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

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

Fix cur{lwp,cpu} and other bits for MODULES

branches: 1.9.6;
Attempt to restore Utah $Hdr$

Only need one ci_onproc member.

+ci_onproc

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.

branches: 1.5.4;
Trailing whitespace

- 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: 1.3.10; 1.3.16; 1.3.18;
Don't expose kernel structs to userland.

branches: 1.2.4; 1.2.6; 1.2.10; 1.2.12;
Move to a flat space register convention. %sr[4-7] are all now the space
number allocated to the process. gcc produces (slightly) better code
with this convention.

Retain backwards compatiblity.

Welcome to 6.99.36

Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

Provide hppa_{enable,disable}_irq

Kill cpu_gethpa by using the HPA stored in the cpu_info structure.

G/C unused [fp]dcache_small.

OK riz@

branches: 1.14.12; 1.14.16;
Add lci to get coherence index for an address.

KNF

Follow upstream license changes for files with Michael Shalayeff's
copyright. In most cases, this means dropping the 3rd and 4th clauses.

Merge nick-hppapmap.

This is a port of the OpenBSD pmap and trap handling code to get us

- Performance boost on some/all machines.
- Well on the way to PA2.0 (in 32bit mode) support. Several
machines probe hardware, but fail sometime after interrupts
are enabled.

Other things changed / fixed on the branch are

- update autoconf to use the OpenBSD code.
- com @ dino is very close to being supported.
- HPPA_REDZONE has been replaced with a working redzone which
is enabled with DIAGNOSTIC.
- UPAGES has been halved in size.
- power(4) from OpenBSD to fix a few bugs.
- updated list of modules from OpenBSD.
- initial ports of uturn(4), astro(4) and elroy(4).
- update some copyrights (remove advertising clause, etc.)

Thanks to mjf for some of the above, testing and listening.

branches: 1.10.20; 1.10.28; 1.10.34;
Remove get_psw/set_psw - they're not needed and can cause problems.

branches: 1.9.12; 1.9.14; 1.9.18;
de-__P() and whitespace.

branches: 1.8.6; 1.8.8; 1.8.12; 1.8.14; 1.8.18;
Pull across OpenBSD cpufunc.h:1.27 (ignore the typo)

revision 1.27
date: 2005/04/07 00:19:28; author: mickey; state: Exp; lines: +3 -3
put a memmory barrier onto the sync_caches()

branches: 1.7.4; 1.7.8;
inline -> __inline

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

merge ktrace-lwp.

branches: 1.4.6;
Import mfcpu() from OpenBSD, needed by power switch code.

branches: 1.3.4; 1.3.6;
Import STI wscons(4) driver from OpenBSD and add new driver for PS/2
keyboard / mouse pots of LASI.

branches: 1.2.6;
Cleaned up BTLB support. There are no longer BTLB function pointers
in struct hppa_cpu_info or anywhere else, now there are just hppa_btlb_*
functions. Added support for machines with split I/D and variable-range
BTLBs. Added support for purging BTLB entries.

branches: 1.1.2; 1.1.4;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

remove (db_addr_t) cast in hppa PC_REGS(regs) definition.
rename tf_hptm to tf_cr24 in kgdb_hppa.c.
This name was lost from trapframe (frame.h) in v1.8 and restored as tf_cr24 in v1.12.

Fixes KGDB enabled build for hppa.

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.

PR port-hppa/50642: src/sys/arch/hppa/include/db_machdep.h:118: bad if test ?

Correct the test for rfir and add one for rfi while I'm here.

branches: 1.12.2; 1.12.6; 1.12.22; 1.12.24; 1.12.26;
Support crash(8) on hppa.

branches: 1.11.4; 1.11.8;
Introduce DDB_EXPR_FMT and replace the logic around DB_EXPR_T_IS_QUAD.

branches: 1.10.2;
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: 1.9.2;
Add a "mach frame" command to hppa ddb.

branches: 1.8.2;
Follow upstream license changes for files with Michael Shalayeff's
copyright. In most cases, this means dropping the 3rd and 4th clauses.

branches: 1.7.38;
Add ldcw as a store instruction. From OpenBSD.

de-__P()

branches: 1.5.14; 1.5.18; 1.5.20;
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: 1.4.2; 1.4.4; 1.4.6;
Change "inline" back to "__inline" in .h files -- C99 is still too
new, and some apps compile things in C89 mode. C89 keywords stay.

As per core@.

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

branches: 1.2.18;
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: 1.1.2; 1.1.4;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

branches: 1.1.4; 1.1.6; 1.1.10;
Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

branches: 1.3.4; 1.3.6; 1.3.10;
fix eisa_intr_string

make pci_intr_string and eisa_intr_string take a buffer and a length
instead of relying in local static storage.

Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

hppa/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: 1.3.22;
Add TLS relocation definitions.

Whitespace.

branches: 1.1.2; 1.1.4; 1.1.116;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

branches: 1.1.4; 1.1.6; 1.1.10;
Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

branches: 1.1.2; 1.1.4;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Trailing whitespace

branches: 1.2.198;
Rename __LDPGSZ to AOUT_LDPGSZ, to accurately reflect what it is.

branches: 1.1.2; 1.1.4;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

branches: 1.2.2; 1.2.4; 1.2.20;
Properly separate fenv.h and ieeefp.h by moving all fenv defines
over to the former.
Now that they are decoupled, make rounding modes match the hardware bits.

fenv(3) support for hppa

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: 1.8.90;
Fix FLT_* and DBL_* redefinition problem.

merge ktrace-lwp.

FPU fixes and improvements, adapted from openbsd:
- handle exceptions correctly
- emulation of unimplemented instructions (eg. on PA-7300LC)

It turns out the hppa ABI we're using does not support an extended-
precision type, so drop the library support for now but leave in place
(#ifdef _LP64) the header definitions.

* 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__.

update for LWPs, and some lite cleanup.

branches: 1.2.2;
PR/3012: Greg A. Woods: Write all float.h files [except the vax of course]
in terms of float_ieee.h

branches: 1.1.2; 1.1.4;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Save CR24 and CR27 and report in ddb.

branches: 1.11.2; 1.11.4;
Whitespace.

The FP regs are accessed in both physical and virtual modes. Make sure
they're allocated in directly mapped memory to avoid aliasing problems
and unnecessary cache flushing.

Fix various names and references. If we ever directly map the uarea and
pcb we can change things at that point.

Significantly helps my J210 (PA7200).

Mostly from OpenBSD.

branches: 1.9.2; 1.9.4;
Follow upstream license changes for files with Michael Shalayeff's
copyright. In most cases, this means dropping the 3rd and 4th clauses.

Merge nick-hppapmap.

This is a port of the OpenBSD pmap and trap handling code to get us

- Performance boost on some/all machines.
- Well on the way to PA2.0 (in 32bit mode) support. Several
machines probe hardware, but fail sometime after interrupts
are enabled.

Other things changed / fixed on the branch are

- update autoconf to use the OpenBSD code.
- com @ dino is very close to being supported.
- HPPA_REDZONE has been replaced with a working redzone which
is enabled with DIAGNOSTIC.
- UPAGES has been halved in size.
- power(4) from OpenBSD to fix a few bugs.
- updated list of modules from OpenBSD.
- initial ports of uturn(4), astro(4) and elroy(4).
- update some copyrights (remove advertising clause, etc.)

Thanks to mjf for some of the above, testing and listening.

branches: 1.7.10; 1.7.18; 1.7.24;
Cast the argument to HPPA_FRAME_ROUND to uintptr_t

branches: 1.6.2; 1.6.6;
Typo in comment. From OpenBSD.

No need for reg.h here.

branches: 1.4.12; 1.4.14; 1.4.18; 1.4.20;
Typo. From OpenBSD.

branches: 1.3.26; 1.3.30; 1.3.32;
merge ktrace-lwp.

branches: 1.2.12;
add hppa support for RAS, context stuff, siginfo and scheduler activations:
- add a RAS hook in cpu_switch().
- fill in the definition of struct mcontext.
- implement cpu_upcall(), cpu_getmcontext(), cpu_getmcontext() and
cpu_switchto().
- for now, force the right priviledge bits and space regs in setcontext().
- use correct values for __SIMPLELOCK_*.
- move the user stack to start at a multiple of the pthread stack size
so that libpthread can use the sp-masking trick.

branches: 1.1.2; 1.1.4; 1.1.10;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

branches: 1.1.4; 1.1.6; 1.1.10;
Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

Consolidate the 128-bit long double defintions to <sys/ieee754.h>
Each arch that uses it now defines __HAVE_LONG_DOUBLE to 128.
<machine/ieee.h> is now just include the machine's math.h followed
by <sys/ieee754.h>

Add inclusion protection.
Convert to ieee_ext to use uint64_t
Format uses implicit NBIT

branches: 1.12.2; 1.12.12; 1.12.16;
Add defines for extu_frac[ln]m

cargo cult the x86 changes.

branches: 1.10.48; 1.10.68; 1.10.70;
make this gdtoa friendly.

branches: 1.9.20; 1.9.24;
merge ktrace-lwp.

branches: 1.8.2;
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: 1.7.8; 1.7.14;
It turns out the hppa ABI we're using does not support an extended-
precision type, so drop the library support for now but leave in place
(#ifdef _LP64) the header definitions.

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.

Use <sys/ieee754.h> where applicable.

Rip out E80 format definitions which are neither "notyet", nor going to
happen.

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; 1.1.4; 1.1.10;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Trailing whitespace

branches: 1.7.18;
Properly separate fenv.h and ieeefp.h by moving all fenv defines
over to the former.
Now that they are decoupled, make rounding modes match the hardware bits.

use unsigned over uint32_t so that this file works without stdint.h
being included before hand.

fixes mknative-gcc problems, and likely others.

fenv(3) support for hppa

branches: 1.4.38; 1.4.56; 1.4.58;
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: 1.3.74; 1.3.78; 1.3.80; 1.3.84;
merge ktrace-lwp.

FPU fixes and improvements, adapted from openbsd:
- handle exceptions correctly
- emulation of unimplemented instructions (eg. on PA-7300LC)

branches: 1.1.2; 1.1.4; 1.1.10;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

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; 1.1.112; 1.1.114; 1.1.116;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

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

branches: 1.2.44;
Remove clause 3 and 4 from TNF licenses

branches: 1.1.2; 1.1.4; 1.1.112; 1.1.114; 1.1.116;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Trailing whitespace

branches: 1.6.88;
Remove clause 3 and 4 from TNF licenses

branches: 1.5.16; 1.5.18; 1.5.20;
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: 1.3.30; 1.3.38; 1.3.44; 1.3.48; 1.3.50;
merge ktrace-lwp.

branches: 1.2.12;
Factor out W{CHAR,INT}_{MAX,MIN} into their own header file.

branches: 1.1.2; 1.1.4; 1.1.10;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Remove clause 3 and 4 from TNF licenses

branches: 1.2.74; 1.2.76; 1.2.78;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

branches: 1.1.2; 1.1.4; 1.1.26;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

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

merge ktrace-lwp.

branches: 1.3.2;
Include <sys/cdefs.h> for __signed; related to lib/30072.

branches: 1.2.6; 1.2.14;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

branches: 1.1.2; 1.1.4; 1.1.10;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

fix hppa and vax builds.

machine/lock.h isn't necessary for __cpu_simple_lock_t, it's in
sys/types.h. avoids cpu_data.h vs sched.h include order issues.

move the hppa ipl_t typedef with the moved usage of it.

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

branches: 1.2.4;
unmask interrupt bits leading to other interrupt registers
now hardware interrupts actually fire instead of being found pending by the
timer interrupt
with this SCSI throughput on my c360 is what you'd expect from an UW esiop

branches: 1.1.4; 1.1.6; 1.1.10;
Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

branches: 1.2.2; 1.2.6;
Implement MI IPI interface with cross-call support.

branches: 1.1.2; 1.1.4;
Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

branches: 1.1.4; 1.1.6; 1.1.10;
Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

add isa_intr_establish_xname() to MD isa headers so that it can be used
by MI drivers

branches: 1.1.4; 1.1.6; 1.1.10; 1.1.12; 1.1.16;
Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

Follow upstream license changes for files with Michael Shalayeff's
copyright. In most cases, this means dropping the 3rd and 4th clauses.

branches: 1.1.2; 1.1.4; 1.1.116;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Trailing whitespace

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

branches: 1.15.34; 1.15.36;
add missing SSIZE_MIN

branches: 1.14.2;
- Normalize inclusion protection (remove)
- Move CHAR_{MIN,MAX} to a common file.
- Fix broken comments

branches: 1.13.2; 1.13.6;
Fix FLT_* and DBL_* redefinition problem.

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: 1.11.14; 1.11.16;
Fix (U)LLONG_(MAX|MIN) defines.

From Jonathan Kollasch. Thanks.

Swap max/min in comments to match symbols.

Multiple inclusion protection.

branches: 1.8.16; 1.8.20; 1.8.22; 1.8.26;
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: 1.6.8; 1.6.16; 1.6.22; 1.6.26; 1.6.28;
Convert to using hexadecimal literals for the type limits.
Also, add a trailing 'U' to the unsigned limits.

branches: 1.5.20; 1.5.22;
merge ktrace-lwp.

branches: 1.4.16;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

branches: 1.3.2;
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: 1.2.2; 1.2.4;
Remove (completely unused) definition of CLK_TCK. Nothing in the
kernel uses it, it is protected by _KERNEL, and it conflicts with the
definition in userland.

Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

branches: 1.2.4;
Consistently define WARN in a way that passes format string checks, i.e.
always uses the same number of arguments as given in the format string.

branches: 1.1.2; 1.1.4; 1.1.6;
Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

hppa: __cpu_simple_lock membar audit.

ok skrll

__cpu_simple_lock(9): Omit needless barriers in init.

It is, and always has been, the caller's responsibility to ensure the
lock is initialized before it can be used -- otherwise the memory
could hold garbage; it is nonsensical to even attempt locking
operations on it before initialization.

So there's no need to issue explicit barriers here. The barrier
seems to have been introduced in sys/arch/alpha/alpha/lock_machdep.c
rev. 1.1 (since moved to inline asm in alpha/include/lock.h) and then
copied & pasted into several other architectures.

Nix mb_* on hppa.

Trailing whitespace

branches: 1.20.4;
more const.

undo paren change

more types for constants

fix constant types

branches: 1.16.44; 1.16.64; 1.16.68;
Remove clause 3 and 4 from TNF licenses

branches: 1.15.14; 1.15.16; 1.15.18;
Don't use structure copy in __cpu_simple_lock_init. Set the array elements
to __SIMPLELOCK_RAW_UNLOCKED instead.

branches: 1.14.2;
Merge the ppcoea-renovation branch to HEAD.

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

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

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

branches: 1.13.4;
Fix build problem: ensure uintptr_t is declared by including <sys/stdint.h>.
OKed by skrll.

Merge nick-csl-alignment.

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

Create real lock primatives using as little asm as possible.

It's not used anywhere, but it's better committed than on any of my HDs.

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;
stub out the ldcw stuff for now, since gcc -O2 chokes on it.

Compile at -O2. Fix various GCC3-isms
XXX mem.c still fails to assemble.

Change headers to comply with the new toolchain changes.

Use #ifdef _KERNEL_OPT around #include "opt_XXX.h"

branches: 1.2.2;
Make sure to include opt_foo.h if a defflag option FOO is used.

branches: 1.1.2; 1.1.4;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Undo previous lwp.h change.

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

branches: 1.1.4;
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.

Consolidate the 128-bit long double defintions to <sys/ieee754.h>
Each arch that uses it now defines __HAVE_LONG_DOUBLE to 128.
<machine/ieee.h> is now just include the machine's math.h followed
by <sys/ieee754.h>

branches: 1.7.112; 1.7.122; 1.7.128;
merge ktrace-lwp.

It turns out the hppa ABI we're using does not support an extended-
precision type, so drop the library support for now but leave in place
(#ifdef _LP64) the header definitions.

#define __HAVE_LONG_DOUBLE on platforms which implement a distinct
`long double' type.

G/c the local declaration of __nanf; handling of this (conditional on
__HAVE_NANF) was moved to <math.h> some time ago.

Change headers to comply with the new toolchain changes.

branches: 1.2.2;
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: 1.1.2; 1.1.4;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

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: 1.13.2;
Clean up the <sys/ucontext.h> <-> <machine/mcontext.h> interface up
a little:
- Define _UC_MD_BIT* constants for the available machine-dependent bits,
and use those constants to define the machine-dependent bits as well
as the machine-independent bits that have machine-dependent values.
- Explicitly generate an error if _UC_TLSBASE, _UC_SETSTACK, or
_UC_CLRSTACK are not defined by <machine/mcontext.h>.

Decorate the HPPA signal trampoline with the appropriate .cfi
directives to allow exception unwind / backtrace across a signal
handler.

Harmonize the namespace of fast TLS base pointer getter functions

Protect __lwp_getprivate_fast() with _RTLD_SOURCE, _LIBC_SOURCE and
__LIBPTHREAD_SOURCE__.

Include in this namespace <sys/tcl.h> and use __BEGIN_DECLS/__END_DECLS
for the sake of consistency.

branches: 1.10.4;
Implement _UC_MACHINE_INTRV() for hppa

INTRV = integer return value
For hppa this is R28 alias _REG_RET0.

Introduce _UC_MACHINE_FP() as a macro

_UC_MACHINE_FP() is a helper macro to extract from mcontext a frame pointer.

Don't rely on this interface as a compiler might strip frame pointer or
optimize it making this interface unreliable.


For hppa assume a small frame context, for larger frames FP might be located
in a different register (4 instead of 3).

For ia64 there is no strict frame pointer, and registers might rotate.
Reuse 79 following:

./gcc/config/ia64/ia64.h:#define HARD_FRAME_POINTER_REGNUM LOC_REG (79)

Once ia64 will mature, this should be revisited.

A macro can encapsulate a real function for extracting Frame Pointer on
more complex CPUs / ABIs.


For the remaining CPUs, reuse standard register as defined in appropriate ABI.

The direct users of this macro are LLVM and GCC with Sanitizers.

Proposed on tech-userlevel@.

Sponsored by <The NetBSD Foundation>

branches: 1.8.22;
Provide a genassym.cf in libc for hppa and use it.

branches: 1.7.6; 1.7.10;
Track if we saved l_private in the mcontext and don't blindly restore it.

This fixes the tests in /usr/tests/lib/libc/setjmp/t_threadjmp

branches: 1.6.4; 1.6.8;
Be nicer to software that insists on -ansi and use __inline.

Allow storing and receiving the LWP private pointer via ucontext_t
on all platforms except VAX and IA64. Add fast access via register for
AMD64, i386 and SH3 ports. Use this fast access in libpthread to replace
the stack based pthread_self(). Implement skeleton support for Alpha,
HPPA, PowerPC, SPARC and SPARC64, but leave it disabled.

Ports that support this feature provide __HAVE____LWP_GETPRIVATE_FAST in
machine/types.h and a corresponding __lwp_getprivate_fast in
machine/mcontext.h.

This material is based upon work partially supported by
The NetBSD Foundation under a contract with Joerg Sonnenberger.

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

branches: 1.3.2;
add hppa support for RAS, context stuff, siginfo and scheduler activations:
- add a RAS hook in cpu_switch().
- fill in the definition of struct mcontext.
- implement cpu_upcall(), cpu_getmcontext(), cpu_getmcontext() and
cpu_switchto().
- for now, force the right priviledge bits and space regs in setcontext().
- use correct values for __SIMPLELOCK_*.
- move the user stack to start at a multiple of the pthread stack size
so that libpthread can use the sp-masking trick.

Add some accessor macros for the ucontext:
* _UC_MACHINE_PC() - access the program counter
* _UC_MACHINE_INTRV() - access the integer return value register
* _UC_MACHINE_SET_PC() - set the program counter (this requires
special handling on some platforms).

add some placeholders so we can at least build.

re-fix hppa builds.

this file uses __cpu_simple_lock(), not just the underlying type,
so it does need machine/lock.h.

machine/mutex.h: Sprinkle sys/types.h, omit machine/lock.h.

Turns out machine/lock.h is not needed for __cpu_simple_lock_t, which
always comes from sys/types.h. And, really, sys/types.h (or at least
sys/stdint.h) is needed for uintN_t and uintptr_t.

fix hppa and vax builds.

machine/lock.h isn't necessary for __cpu_simple_lock_t, it's in
sys/types.h. avoids cpu_data.h vs sched.h include order issues.

move the hppa ipl_t typedef with the moved usage of it.

machine/mutex.h: Sprinkle includes so this can be used by crash(8).

XXX pullup-10

branches: 1.15.26;
hppa has custom adaptive mutexes. Allow it to build again while not
reintroducing the main read of mtx_owner that I wanted to eliminate.

Nix mb_* on hppa.

branches: 1.13.4;
const me harder!

const me harder.

branches: 1.11.18;
sys/mutex.h includes machine/intr.h via sys/intr.h, so no need here.

Don't rely on global APIs from internal.

branches: 1.9.22;
Remove clause 3 and 4 from TNF licenses

branches: 1.8.14; 1.8.16; 1.8.18;
make kmutex_t and krwlock_t smaller by killing lock id.
ok'ed by Andrew Doran.

branches: 1.7.2;
Merge the ppcoea-renovation branch to HEAD.

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

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

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

branches: 1.6.4;
Merge nick-csl-alignment.

branches: 1.5.4; 1.5.8; 1.5.10;
Pull across #include file fix from yamt-idlelwp.

branches: 1.4.2; 1.4.4; 1.4.8; 1.4.10; 1.4.16;
Add MUTEX_CLEAR_WAITERS().

Destroy a mutex correctly. That is, overright the owner and don't set
mtx_waiters.

Merge newlock2 to head.

branches: 1.1.2;
file mutex.h was initially added on branch newlock2.

branches: 1.1.4; 1.1.6; 1.1.10;
Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

t_signal_and_sp: Add hppa support.

Fortunately, hppa -- which uses monster 64-byte(!) stack alignment --
looks good already.

PR kern/59327: user stack pointer is not aligned properly

branches: 1.30.10;
bump MSGBUFSIZE

Include "opt_param.h" (ifdef _KERNEL_OPT) everywhere that MSGBUFSIZE is
referenced since some sources include <machine/param.h>.

KNF

branches: 1.27.6;
Move machine dependent AUDIO_BLK_MS default value to <machine/param.h>.
If the port has __AUDIO_BLK_MS in <machine/param.h>, it will be used.
Otherwise the default value (currently 10 msec) defined in audio.c will
be used. This mechanism is for very old ports which cannot satisfactorily
handle 10 msec block. Currently hppa, m68k, sh3, sparc(!64) and vax are.

For port maintainers, if general models in your port cannot satisfactorily
handle 10 msec block, please consider to define your suitable longer period
(40 msec would be a good first choice).
But please don't be eager to make the default value shorter.

<machine/param.h> was discussed in source-changes-d. It's better than
ifdef storm, or adding 60+ new header files in every arch/*/include/
directories for this. Thanks mrg@, ad@, and everyone.
http://mail-index.netbsd.org/source-changes-d/2020/05/01/msg012572.html

Revert another historic $Hdr$ collapse.

Revert "Include opt_diagnostic.h for DIAGNOSTIC."

This did not do what I thought it did. opt_diagnostic.h is only for
the unused _DIAGNOSTIC, which seems like an abortive attempt to
incrementally convert DIAGNOSTIC to an opt_*.h option rather than a
command-line option.

Include opt_diagnostic.h for DIAGNOSTIC.

...at least, in header files, which may not have already included
libkern.h.

branches: 1.23.4;
Trailing whitespace

move DEV_BSIZE, DEV_BSHIFT out of MD param.h, they are same on all ports

also move BLKDEV_IOSIZE, MAXPHYS, but allow override since some ports
have different value (powerpc uses NBPG for BLKDEV_IOSIZE, sun2/sun3
have lower MAXPHYS)

branches: 1.21.16; 1.21.18;
make sure MSGBUFSIZE can't expand strangely by using parens.

branches: 1.20.6;
Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

branches: 1.19.6; 1.19.10;
proper sizing of kmem_arena on different ports

PR port-i386/45946: Kernel locks up in VMEM system

improve sizing of kmem_arena now that more allocations are made from it
don't enforce limits if not required

ok: riz@

Use and define ALIGN() ALIGN_POINTER() and STACK_ALIGN() consistently,
and avoid definining them in 10 different places if not needed.

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: 1.15.10; 1.15.14;
Remove separate mb_map. The nmbclusters is computed at boot time based
on the amount of physical memory and limited by NMBCLUSTERS if present.
Architectures without direct mapping also limit it based on the kmem_map
size, which is used as backing store. On i386 and ARM, the maximum KVA
used for mbuf clusters is limited to 64MB by default.

The old default limits and limits based on GATEWAY have been removed.
key_registered_sb_max is hard-wired to a value derived from 2048
clusters.

branches: 1.14.2;
Simplify.

Merge nick-hppapmap.

This is a port of the OpenBSD pmap and trap handling code to get us

- Performance boost on some/all machines.
- Well on the way to PA2.0 (in 32bit mode) support. Several
machines probe hardware, but fail sometime after interrupts
are enabled.

Other things changed / fixed on the branch are

- update autoconf to use the OpenBSD code.
- com @ dino is very close to being supported.
- HPPA_REDZONE has been replaced with a working redzone which
is enabled with DIAGNOSTIC.
- UPAGES has been halved in size.
- power(4) from OpenBSD to fix a few bugs.
- updated list of modules from OpenBSD.
- initial ports of uturn(4), astro(4) and elroy(4).
- update some copyrights (remove advertising clause, etc.)

Thanks to mjf for some of the above, testing and listening.

branches: 1.12.10; 1.12.18; 1.12.24;
Various improvements to the hppa kernel for gdb.

- add the useful space and control registers to struct reg
- update process_{read,write}_regs accordingly
- use MID_HPPA in core dumps.
- dump the fp regs into cores.
- add single stepping support from OpenBSD.

Remove the #endif corresponding to the #ifdef _KERNEL removed in previous.

Remove COMPAT_HPUX.

branches: 1.9.20; 1.9.26; 1.9.32;
Remove hppa_{round,trunc}_page.

branches: 1.8.8;
- remove unused bdbtofsb.
- move the following macros from MD headers to sys/param.h.
ctod
dtoc
ctob
btoc
dbtob
btodb

branches: 1.7.4; 1.7.8;
merge ktrace-lwp.

branches: 1.6.12;
add hppa support for RAS, context stuff, siginfo and scheduler activations:
- add a RAS hook in cpu_switch().
- fill in the definition of struct mcontext.
- implement cpu_upcall(), cpu_getmcontext(), cpu_getmcontext() and
cpu_switchto().
- for now, force the right priviledge bits and space regs in setcontext().
- use correct values for __SIMPLELOCK_*.
- move the user stack to start at a multiple of the pthread stack size
so that libpthread can use the sp-masking trick.

Use #ifdef _KERNEL_OPT around #include "opt_XXX.h"

branches: 1.4.2;
Make sure to include opt_foo.h if a defflag option FOO is used.

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.

* Define PAGE_SHIFT, PAGE_SIZE, and PAGE_MASK in <hppa/vmparam.h>,
not in <hppa/param.h>.
* Define NBPG in terms of PGSHIFT.

branches: 1.1.2; 1.1.4;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Trailing whitespace

branches: 1.9.60;
The FP regs are accessed in both physical and virtual modes. Make sure
they're allocated in directly mapped memory to avoid aliasing problems
and unnecessary cache flushing.

Fix various names and references. If we ever directly map the uarea and
pcb we can change things at that point.

Significantly helps my J210 (PA7200).

Mostly from OpenBSD.

branches: 1.8.2; 1.8.4;
Follow upstream license changes for files with Michael Shalayeff's
copyright. In most cases, this means dropping the 3rd and 4th clauses.

u_intNN_t -> uintNN_t

"same" code before and after.

branches: 1.6.10;
Adjust comments to fit <80 columns.

Various improvements to the hppa kernel for gdb.

- add the useful space and control registers to struct reg
- update process_{read,write}_regs accordingly
- use MID_HPPA in core dumps.
- dump the fp regs into cores.
- add single stepping support from OpenBSD.

branches: 1.4.14; 1.4.20; 1.4.26;
Whitespace.

branches: 1.3.26; 1.3.30; 1.3.32;
merge ktrace-lwp.

branches: 1.2.12;
store the kernel stack pointer for a sleeping LWP in its PCB instead of
in its trapframe. this is needed for scheduler activations, so that we can
change the user stack pointer via the trapframe. from openbsd.

branches: 1.1.2; 1.1.4; 1.1.10;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Provide pci_intr_setattr (which does nothing atm)

branches: 1.2.4; 1.2.6; 1.2.10;
make pci_intr_string and eisa_intr_string take a buffer and a length
instead of relying in local static storage.

Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

fix various typos in comments.

branches: 1.2.6;
fix various typos in documentation, comments and sysctl device description.
mainly aion -> ation and inlude -> include.

branches: 1.1.4; 1.1.6; 1.1.10;
Rename NetBSD/hp700 to NetBSD/hppa.

Unfortunately our VCS isn't very helpful here.

port-hppa/56849: Wacko kernel memory accounting in current/hppa

Two fixes:
- Don't include direct mapped memory in pmap statistics
- Decrement pmap statistics counts in pmap_kremove

pmap_remove_all(): Return a boolean value to indicate the behaviour. If
true, all mappings have been removed, the pmap is totally cleared out, and
UVM can then avoid doing the work to call pmap_remove() for each map entry.
If false, either nothing has been done, or some helpful arch-specific voodoo
has taken place.

Adjust for UVM locking changes.

branches: 1.38.2;
Use __BIT()

branches: 1.37.38; 1.37.42;
switch to __USE_TOPDOWN_VM.
move the stack to the top of the user address space so that
the available free space is more contiguous.

branches: 1.36.6;
Track if a page has an executable mapping and flush the icache (and
dcache) appropriately.

Fixes the lang/python26 build on my C3700 (PA8700) and chuq's J6700 with
PA8500.

Thanks to chuq for ideas and help with this.

Comment fix.

No need to flush the icache/itlb for pool pages as they're never marked
executable.

Define PMAP_NEED_PROCWR and provide pmap_procwr so that the i-cache is
synchronised with the d-cache appropriately.

Whitespace.

G/C pvh_aliases

branches: 1.30.2; 1.30.6;
Welcome to 5.99.53! Merge rmind-uvmplock branch:

- Reorganize locking in UVM and provide extra serialisation for pmap(9).
New lock order: [vmpage-owner-lock] -> pmap-lock.

- Simplify locking in some pmap(9) modules by removing P->V locking.

- Use lock object on vmobjlock (and thus vnode_t::v_interlock) to share
the locks amongst UVM objects where necessary (tmpfs, layerfs, unionfs).

- Rewrite and optimise x86 TLB shootdown code, make it simpler and cleaner.
Add TLBSTATS option for x86 to collect statistics about TLB shootdowns.

- Unify /dev/mem et al in MI code and provide required locking (removes
kernel-lock on some ports). Also, avoid cache-aliasing issues.

Thanks to Andrew Doran and Joerg Sonnenberger, as their initial patches
formed the core changes of this branch.

branches: 1.29.6;
Move struct vm_page_md definition from vmparam.h to pmap.h, because
it's used only by pmap. vmparam.h has definitions for wider
audience.

All GENERIC kernels build tested, except ia64.

powerpc/include/booke/vmparam.h has one too, but it has no pmap.h,
so it's left as is.

Turn PMAP_NOCACHE into MI flag.
Add MI flags PMAP_WRITE_COMBINE, PMAP_WRITE_BACK, PMAP_NOCACHE_OVR.
Update pmap(9) manpage.

hppa: Remove MD PMAP_NOCACHE flag as it exists as MI flag
mips: Rename MD PMAP_NOCACHE to PGC_NOCACHE.

x86: Implement new MI flags using Page-Attribute Tables.
x86: Implement BUS_SPACE_MAP_PREFETCHABLE.

Patch presented on tech-kern@:
http://mail-index.netbsd.org/tech-kern/2010/06/30/msg008458.html

No comments on this last version.

Allow PVF_UNCACHEABLE in set/clear of pmap_changebit call (for now).

Not all PA CPUs have the U-bit (uncacheable) for non-IO memory. In fact
most don't. Deal with non-equivalent aliases by removing and flushing the
managed mappings, and flushing the unmanaged mappings.

When flushing caches/TLB flush the cache before purging the TLB just in
case the flush enters the mapping into the TLB.

branches: 1.25.2;
Add #include "opt_cputype.h" where necessary.

Deal with PA2.0 cache move-in rules by purging the TLB as well as
flushing/purging the cache.

branches: 1.23.2;
Put PMAP_NOCACHE in the MD space.

Use the new flags argument to pmap_kenter_pa for PMAP_NOCACHE.

u_intNN_t -> uintNN_t

"same" code before and after.

Remove if defined(HP7100LC_CPU) || defined(HP7300LC_CPU) from around
pmap_hptsize and pdc_hwtlb (for now).

Move HPPA_SID_KERNEL into pmap.h and deal with the move.

Merge nick-hppapmap.

This is a port of the OpenBSD pmap and trap handling code to get us

- Performance boost on some/all machines.
- Well on the way to PA2.0 (in 32bit mode) support. Several
machines probe hardware, but fail sometime after interrupts
are enabled.

Other things changed / fixed on the branch are

- update autoconf to use the OpenBSD code.
- com @ dino is very close to being supported.
- HPPA_REDZONE has been replaced with a working redzone which
is enabled with DIAGNOSTIC.
- UPAGES has been halved in size.
- power(4) from OpenBSD to fix a few bugs.
- updated list of modules from OpenBSD.
- initial ports of uturn(4), astro(4) and elroy(4).
- update some copyrights (remove advertising clause, etc.)

Thanks to mjf for some of the above, testing and listening.

branches: 1.17.2;
Make pmap_kernel() a MI macro for struct pmap *kernel_pmap_ptr,
which is now the "API" provided by the pmap module. pmap_kernel()
remains as the syntactic sugar.

Bonus cosmetics round: move all the pmap_t pointer typedefs into
uvm_pmap.h.

Thanks to Greg Oster for providing cpu muscle for doing test builds.

branches: 1.16.6; 1.16.10; 1.16.16; 1.16.18;
include sys/simplelock.h

branches: 1.15.2; 1.15.8;
Merge the ppcoea-renovation branch to HEAD.

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

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

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

branches: 1.14.10;
Like I said - don't futz with the trapframe in pmap_activate. Instead
update the trapframe space and protection register in cpu_lwp_fork and
setregs.

pmap_activate shouldn't play with the trap frame - especially not now it's
called by the MI code.

Implement a way of tracking the vmspace allocated to a process and its
LWPs so that if it changes underneath us we can correct the space id in
the trapframe in pmap_activate for now.

An example of when this happens is vfork/exec.

An exec hook is probably the way to go.

branches: 1.12.4;
de-__P()

s/lwp/l/ for argument name in pmap_deactivate.

branches: 1.11.20; 1.11.24; 1.11.26;
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: 1.10.2; 1.10.4; 1.10.6;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

branches: 1.8.8;
Convert the PMAP_PREFER() macro from two arguments (offset and hint)
to four (adding size and direction).

In order for topdown uvm to be an option on ports using PMAP_PREFER,
they will need to "prefer" lower addresses if topdown is being used.
Additionally, at least one port also needs to know the size.

branches: 1.7.4;
add hppa support for RAS, context stuff, siginfo and scheduler activations:
- add a RAS hook in cpu_switch().
- fill in the definition of struct mcontext.
- implement cpu_upcall(), cpu_getmcontext(), cpu_getmcontext() and
cpu_switchto().
- for now, force the right priviledge bits and space regs in setcontext().
- use correct values for __SIMPLELOCK_*.
- move the user stack to start at a multiple of the pthread stack size
so that libpthread can use the sp-masking trick.

convert pmap_deactivate() from a macro to an inline function
so that the kernel builds again.

add a PMAP_NC flag for pmap_kenter_pa() to specific a non-cached mapping.
use this in mbus_dmamem_map() to fix corruption of DMA memory.
note that this TLB bit is ignored on some CPUs (PA7100 and probably
others of that era), so this doesn't fix the problem in general,
but it does work on newer models and will make things easier later.

update for LWPs, and some lite cleanup.

branches: 1.3.6;
it really helps to get the stub right before cutting + pasting it 27 times.
alas, I did not. doh.

add pmap_remove_all() hook (empty on most platforms so far).

branches: 1.1.2; 1.1.4;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

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: 1.1.2; 1.1.4; 1.1.200; 1.1.202;
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.

PR/57261: hppa should be converted to __HAVE_SYSCALL_INTERN

Provide syscall_intern and use the md_syscall in syscall trap handling.

Use __BIT

Use __vaddr_t since we don't expose vaddr_t by default to userland.

branches: 1.12.42;
Move to a flat space register convention. %sr[4-7] are all now the space
number allocated to the process. gcc produces (slightly) better code
with this convention.

Retain backwards compatiblity.

Welcome to 6.99.36

branches: 1.11.8; 1.11.18; 1.11.22;
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@.

Add md_astpending to struct mdlwp and use it.

Whitespace.

branches: 1.8.2; 1.8.4;
Include sys/user.h for MD proc.h (hppa and m68k ports).

Merge nick-hppapmap.

This is a port of the OpenBSD pmap and trap handling code to get us

- Performance boost on some/all machines.
- Well on the way to PA2.0 (in 32bit mode) support. Several
machines probe hardware, but fail sometime after interrupts
are enabled.

Other things changed / fixed on the branch are

- update autoconf to use the OpenBSD code.
- com @ dino is very close to being supported.
- HPPA_REDZONE has been replaced with a working redzone which
is enabled with DIAGNOSTIC.
- UPAGES has been halved in size.
- power(4) from OpenBSD to fix a few bugs.
- updated list of modules from OpenBSD.
- initial ports of uturn(4), astro(4) and elroy(4).
- update some copyrights (remove advertising clause, etc.)

Thanks to mjf for some of the above, testing and listening.

branches: 1.6.10; 1.6.18; 1.6.24;
Various improvements to the hppa kernel for gdb.

- add the useful space and control registers to struct reg
- update process_{read,write}_regs accordingly
- use MID_HPPA in core dumps.
- dump the fp regs into cores.
- add single stepping support from OpenBSD.

branches: 1.5.6;
s/proc/lwp/ in comment

branches: 1.4.30; 1.4.48; 1.4.50; 1.4.54; 1.4.56;
merge ktrace-lwp.

branches: 1.3.16;
update for LWPs, and some lite cleanup.

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; 1.1.4; 1.1.10;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Fix kernel profiling on HPPA.

- stop gcc emitting stuff that HPUX requires
- don't use splhigh() in MCOUNT_ENTER as a call to _mcount will be
generated at the moment. Disable interrupts in hardware instead.
- Fix _PROF_PROLOGUE to save/restore all the register args when calling
_mcount.
- Fixup LEAF_ENTRY to dtrt (I think) in the GPROF case.
- Provide LEAF_ENTRY_NOPROFILE and sprinkle its use where i) profiling
causes problems, e.g. trap handlers, and ii) where it just doesn't
make sense, e.g. start.

branches: 1.7.12; 1.7.14; 1.7.18; 1.7.20;
de-__P()

s/lwp/l/ for argument name in pmap_deactivate.

branches: 1.6.20; 1.6.24; 1.6.26;
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: 1.5.2; 1.5.4; 1.5.6;
__asm__ -> __asm
__const__ -> const
__inline__ -> inline
__volatile__ -> volatile

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

merge ktrace-lwp.

branches: 1.2.16;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

branches: 1.1.2; 1.1.4; 1.1.10;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Typos.

Remove unnecessary #include

branches: 1.7.12; 1.7.16;
Follow upstream license changes for files with Michael Shalayeff's
copyright. In most cases, this means dropping the 3rd and 4th clauses.

Merge nick-hppapmap.

This is a port of the OpenBSD pmap and trap handling code to get us

- Performance boost on some/all machines.
- Well on the way to PA2.0 (in 32bit mode) support. Several
machines probe hardware, but fail sometime after interrupts
are enabled.

Other things changed / fixed on the branch are

- update autoconf to use the OpenBSD code.
- com @ dino is very close to being supported.
- HPPA_REDZONE has been replaced with a working redzone which
is enabled with DIAGNOSTIC.
- UPAGES has been halved in size.
- power(4) from OpenBSD to fix a few bugs.
- updated list of modules from OpenBSD.
- initial ports of uturn(4), astro(4) and elroy(4).
- update some copyrights (remove advertising clause, etc.)

Thanks to mjf for some of the above, testing and listening.

branches: 1.5.10; 1.5.18; 1.5.24;
Add W and O PSW bit defines.

From OpenBSD.

branches: 1.4.50; 1.4.56; 1.4.64;
merge ktrace-lwp.

branches: 1.3.12;
add hppa support for RAS, context stuff, siginfo and scheduler activations:
- add a RAS hook in cpu_switch().
- fill in the definition of struct mcontext.
- implement cpu_upcall(), cpu_getmcontext(), cpu_getmcontext() and
cpu_switchto().
- for now, force the right priviledge bits and space regs in setcontext().
- use correct values for __SIMPLELOCK_*.
- move the user stack to start at a multiple of the pthread stack size
so that libpthread can use the sp-masking trick.

update for LWPs, and some lite cleanup.

branches: 1.1.2; 1.1.4; 1.1.10;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Trailing whitespace

branches: 1.4.64;
Add a couple of comments and some whitespace.

Merge nick-hppapmap.

This is a port of the OpenBSD pmap and trap handling code to get us

- Performance boost on some/all machines.
- Well on the way to PA2.0 (in 32bit mode) support. Several
machines probe hardware, but fail sometime after interrupts
are enabled.

Other things changed / fixed on the branch are

- update autoconf to use the OpenBSD code.
- com @ dino is very close to being supported.
- HPPA_REDZONE has been replaced with a working redzone which
is enabled with DIAGNOSTIC.
- UPAGES has been halved in size.
- power(4) from OpenBSD to fix a few bugs.
- updated list of modules from OpenBSD.
- initial ports of uturn(4), astro(4) and elroy(4).
- update some copyrights (remove advertising clause, etc.)

Thanks to mjf for some of the above, testing and listening.

branches: 1.2.112; 1.2.120; 1.2.126;
Significant pmap changes to no longer rely on the "U-bit" (TLB_UNCACHEABLE)
to deal with aliasing of regular memory pages, because many processors don't
support it.

Now, the pmap marks all mappings of a page that has any non-equivalent
aliasing and any writable mapping, and the fault handlers watch for this
and flush other mappings out of the TLB and cache before (re)entering a
conflicting mapping.

When a page has non-equivalent aliasing, only one writable mapping at
a time may be in the TLB and cache. If no writable mapping is in the
TLB and cache, any number of read-only mappings may be.

The PA7100LC/PA7300LC fault handlers have not been converted yet.

branches: 1.1.2; 1.1.4;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Match up PTRACE_BREAKPOINT_ASM with PTRACE_BREAKPOINT which is the
gdb breakpoint instruction.

Define a PTRACE_ILLEGAL_ASM

Introduce PT_LWPSTATUS + PT_LWPNEXT, obsolete PT_LWPINFO

PT_LWPINFO is a legacy ptrace(2) operation that was originally intended
to retrieve the thread (LWP) information inside a traced process.

It has a number of flaws and is confused with PT_LWPINFO from FreeBSD.

PT_LWPSTATUS and PT_LWPNEXT address the problems (shortly by: rename,
removal of pl_event) and introduces new features: signal context
(pl_sigpend, pl_sigmask), LWP name (pl_name), LWP TLS base address
(pl_private). The private pointer was so far missing information for
a debugger.

PT_LWPSTATUS@nnn is now shipped with core(5) files and contain LWP specific
information, so far missed in the core(5) files.

PT_LWPSTATUS retrieves LWP information for the prompted thread.
PT_LWPNEXT retrieves LWP information for the next thread, borrowing the
semantics from NetBSD specific PT_LWPINFO.

PT_LWPINFO is namespaced with __LEGACY_PT_LWPINFO and still available for
the foreseeable future, without plans of removing it.

Add ATF tests for PT_LWPSTATUS + PT_LWPNEXT.

Keep ATF tests for PT_LWPINFO.

Switch GDB to new API.

Proposed on tech-kern@.

branches: 1.9.2;
Introduce PTRACE_REG_FP() a helper macro to retrieve the frame pointer

The macro is dummy for ia64 (the FP register is unknown and can change
freely) and sparc/sparc64 (not stored in struct reg).

branches: 1.8.12;
Add new macro PTRACE_BREAKPOINT_ASM in <sys/ptrace.h> MD part

This macro ships with a MD-specific assembly instruction triggering
a software breakpoint.

Missing instruction for powerpc targets.

This code is used in ATF tests (lib/libc/sys/t_ptrace_wait).

Original patch by Nick Hudson, thanks!

Add new ptrace(2) API: PT_SETSTEP & PT_CLEARSTEP

These operations allow to mark thread as a single-stepping one.

This allows to i.a.:
- single step and emit a signal (PT_SETSTEP & PT_CONTINUE)
- single step and trace syscall entry and exit (PT_SETSTEP & PT_SYSCALL)

The former is useful for debuggers like GDB or LLDB. The latter can be used
to singlestep a usermode kernel. These examples don't limit use-cases of
this interface.

Define PT_*STEP only for platforms defining PT_STEP.

Add new ATF tests setstep[1234].

These ptrace(2) operations first appeared in FreeBSD.

Sponsored by <The NetBSD Foundation>

branches: 1.6.2;
fix register names

branches: 1.5.2;
For processors that have memory breakpoints, add macros for them to help
libproc

Provide access to pc/sp/syscall-return registers like we have for mcontext

branches: 1.3.22; 1.3.40;
Follow upstream license changes for files with Michael Shalayeff's
copyright. In most cases, this means dropping the 3rd and 4th clauses.

branches: 1.2.18;
Define PT_MACHDEP_STRINGS for kdump(1)

branches: 1.1.2; 1.1.4; 1.1.26; 1.1.68; 1.1.86; 1.1.88; 1.1.92; 1.1.94;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Trailing whitespace

branches: 1.12.60;
MULTIPROCESSOR fixes

- provide curcpu in a control register instead of curlwp
- define {GET,SET}_CURLWP and GET_CURCPU and use whereever possible.
- define a cpu count and use it in CPU_INFO_FOREACH

XXX hppa_ncpus isn't valid yet.

The FP regs are accessed in both physical and virtual modes. Make sure
they're allocated in directly mapped memory to avoid aliasing problems
and unnecessary cache flushing.

Fix various names and references. If we ever directly map the uarea and
pcb we can change things at that point.

Significantly helps my J210 (PA7200).

Mostly from OpenBSD.

branches: 1.10.2; 1.10.4;
Follow upstream license changes for files with Michael Shalayeff's
copyright. In most cases, this means dropping the 3rd and 4th clauses.

u_intNN_t -> uintNN_t

"same" code before and after.

Note that CR27 is used for thread local storage (TLS)

Merge nick-hppapmap.

This is a port of the OpenBSD pmap and trap handling code to get us

- Performance boost on some/all machines.
- Well on the way to PA2.0 (in 32bit mode) support. Several
machines probe hardware, but fail sometime after interrupts
are enabled.

Other things changed / fixed on the branch are

- update autoconf to use the OpenBSD code.
- com @ dino is very close to being supported.
- HPPA_REDZONE has been replaced with a working redzone which
is enabled with DIAGNOSTIC.
- UPAGES has been halved in size.
- power(4) from OpenBSD to fix a few bugs.
- updated list of modules from OpenBSD.
- initial ports of uturn(4), astro(4) and elroy(4).
- update some copyrights (remove advertising clause, etc.)

Thanks to mjf for some of the above, testing and listening.

branches: 1.6.10; 1.6.18; 1.6.24;
Various improvements to the hppa kernel for gdb.

- add the useful space and control registers to struct reg
- update process_{read,write}_regs accordingly
- use MID_HPPA in core dumps.
- dump the fp regs into cores.
- add single stepping support from OpenBSD.

branches: 1.5.50; 1.5.56; 1.5.64;
merge ktrace-lwp.

branches: 1.4.6;
Implement powerd(8) interface via sysmon(9) for power switch, controllable by sysctl(8).

branches: 1.3.4; 1.3.6;
Import STI wscons(4) driver from OpenBSD and add new driver for PS/2
keyboard / mouse pots of LASI.

add hppa support for RAS, context stuff, siginfo and scheduler activations:
- add a RAS hook in cpu_switch().
- fill in the definition of struct mcontext.
- implement cpu_upcall(), cpu_getmcontext(), cpu_getmcontext() and
cpu_switchto().
- for now, force the right priviledge bits and space regs in setcontext().
- use correct values for __SIMPLELOCK_*.
- move the user stack to start at a multiple of the pthread stack size
so that libpthread can use the sp-masking trick.

branches: 1.1.2; 1.1.4; 1.1.10;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Follow upstream license changes for files with Michael Shalayeff's
copyright. In most cases, this means dropping the 3rd and 4th clauses.

branches: 1.1.2; 1.1.4; 1.1.116;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Largely eliminate the MD rwlock.h header file.

This was full of definitions that have been obsolete for over a
decade. The file still remains for __HAVE_RW_STUBS but that's all.
Used only internally in kern_rwlock.c now, not by <sys/rwlock.h>.

branches: 1.5.88;
Remove clause 3 and 4 from TNF licenses

branches: 1.4.14; 1.4.16; 1.4.18;
- Change lock_cas from "compare and set" to "compare and swap".
- Add aliases for atomic_cas_ulong(), etc.

Ok skrll@

make kmutex_t and krwlock_t smaller by killing lock id.
ok'ed by Andrew Doran.

branches: 1.2.4; 1.2.8; 1.2.24; 1.2.26; 1.2.30; 1.2.32;
Merge newlock2 to head.

branches: 1.1.2;
file rwlock.h was initially added on branch newlock2.

branches: 1.1.2; 1.1.4;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Finish restoring the compat code.

We still need struct sigcontext for longjmp.

"struct sigcontext" has never been used on NetBSD/hppa; garbage-collect
it and other related definitions.

Merge all MD __sigaction14_sigtramp.c copies into one:
- sparc and sparc64 were not using version 0 sigcontext when there were
no arguments in the signal version. This was probably a bug.
- vax is using +1 the version numbers of the other archs.
- Only hppa was defining __LIBC12_SOURCE__ so it was getting a working
sigcontext before. all the other ports that supported sigcontext had
the compat code disabled.
[pointed out by thorpej, thanks!]
If we want to remove sigcontext support from userland at least now there
is less work to do so.

Trailing whitespace

branches: 1.7.4;
need sigtypes.h for sigset_t, since <sys/siginfo.h> includes this directly.

branches: 1.6.18;
__HAVE_SIGINFO has not been required/used for a long time now.

Prompted by uwe@

branches: 1.5.100;
merge ktrace-lwp.

To the rest of the kernel, pretend that hppa supports SIGINFO.
There are still only "sigcontext" stackframes passed to the user,
but at least we can clean up the MI sources now.

Add multiple inclusion protection.

branches: 1.2.2;
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: 1.1.2; 1.1.4;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Follow upstream license changes for files with Michael Shalayeff's
copyright. In most cases, this means dropping the 3rd and 4th clauses.

branches: 1.1.2; 1.1.4; 1.1.116;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

Actually remove spinlock.h

branches: 1.1.2; 1.1.4; 1.1.26; 1.1.64;
Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.

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.

port to GCC 4.5.

merge ktrace-lwp.

Modernise these to use GCC __builtin_* functions and types.

Also provide a (protected) va_copy.

Provide lint wrappers around the va_* defs like other ports do so this can
make it through lint (was dying in libpam)

branches: 1.2.8; 1.2.10;
Move UCB-licensed code from 4-clause to 3-clause licence.

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