CVS log for src/sys/arch/hppa/hppa/trap.S

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Default branch: MAIN

PR/57261: hppa should be converted to __HAVE_SYSCALL_INTERN

Provide syscall_intern and use the md_syscall in syscall trap handling.

fix various typos in comments.

-Wno-error=array-bounds

Sync with HEAD

Fix a comment

Whitespace

Trailing whitespace

Remove references to COMPAT_OSF1 in HPPA, it has never been supported on
this architecture.

sync to latest -current.

sync with head

Update comments to reflect that we always have a hardware FPU.

Remove unnecessary cache flushes.

FP regs are stored in memory from a pool which is direct mapped and
therefore available in virtual and physical modes.

unifdef FPEMUL. All our supported systems have an FPU.

sync to latest -current.

Whitespace in previous

Use CR_ control regsiter definition for consistency.

sync to latest -current.

Enhance a comment.

merge to -current.

Fix the CPU #ifdefs

From OpenBSD...

Fix encoding of DIAG instructions in the MFCPU_T and MTCPU_T macros. MTCPU_T
was encoded as a read instruction, while MFCPU_T was encoded as a
read-through-TH instruction, although the only uses of it concern registers
read through CH.

(You are not supposed to understand this, this is a dark corner of undocumented
rotten PA-RISC bowels).

Cache SID hashing will now correctly be disabled on PCXS, PCXT and PCXT'
processors.

Proper encoding from the old PA-RISC mklinux sources; tested on 720 (PCXS)
and 715/75 (PCXT); ok kettenis@

Sync with HEAD.

sync with head

Sync with HEAD

Don't use %tr3 (aka cr27) in emu trap. cr27 is now used for lwp private
info.

Remove old/incorrect comment.

Whitespace.

Add a comment.

(Attempt to) bundle some stw/ldws and remove redundant CR_TLS save.

No need to save CR_TLS twice in the DDB case.

hi joerg.

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.

Sync with HEAD

Make some more information (psw/fpu_state) per cpu.

Save CR24 and CR27 and report in ddb.

Fix MULTIPROCESSOR curlwp/curcpu handling.

Sync with HEAD.

sync with head.

sync with head

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.

sync with head

Sync with HEAD.

Remove unused BSS allocation.

Per-cpu "physical" trap save area.

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.

Comment style.

sync with head

A nullify snuck in. Remove it.

Comment improvements.

More comment improvement.

Comment improvements.

Fix and use the BSS macro.

Remove unnecessary comment.

Whitespace.

Remove an old comment.

Tweak comment. From OpenBSD.

Consistent comment format.

Remove #if 0 / #endif section

Remove redundant line.

Correct/add comments.

Rename L_ADDR to L_PCB and amend some comments accordingly.

Remove U_PCB as requested by rmind.

Same code before and after.

sync with head

Kill '$' in exported symbols.

G/C DTRAP

Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.

sync with head.

Correct some CPU ifdefs so that a HP7100_CPU only kernel should compile.

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.

Turn off TLB_STATS_{PRE,AFT}

Whitespace.

Whitespace.

Fix comment.

Make sure the pipline has been completely flushed after executing an rfi
instruction. Without this I was being hit with an "Illegal instruction"
trap.

Sprinkle _NOPROFILE so that profiling kernels boot.

Comment fixes.

Oops, need the user stack in %t4 for later.

Use shadow registers in ibrk and not %t1/%t2.

G/C __pmap_pv_update

Commit work in progress.

Sync with HEAD.

Sync with HEAD.

Sync with wrstuden-revivesa-base-2.

Update a comment.

Typo in comment.

Sync with HEAD.

sync with head.

sync with head.

Remove clause 3 and 4 from TNF licenses

sync with head

sync with HEAD

Sync with HEAD

Sync with HEAD.

Sync with head.

Improve ddb backtraces by:

	- Starting with the right set of fp, pc, and rp in all cases.
	- Dropping the argument printing stuff as it could never work.
	- Backtrace through traps and decode syscalls properly by
	  making sure the trapframe is at a known offset from the stack
	  pointer in both cases. Also, ensure that the frame pointer
	  is zero so that we can detect traps.

Sync with HEAD.

Sync with HEAD.

sync with head.

Sync with HEAD.

Sync with HEAD

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.

sync with HEAD

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.

sync with head.

Sync with head.

Sync with head.

Update to HEAD.

Use the CALL macro. No functional change.

merge yamt-idlelwp branch.  asked by core@.  some ports still needs work.

from doc/BRANCHES:

	idle lwp, and some changes depending on it.

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

sync with head.

Remove useless comment.

Use sr1 to jump to syscall as we just loaded it with the right value.

sync with head.

Remove unused label.

Remove useless curlwp == NULL test.

- sync with head.
- move sched_changepri back to kern_synch.c as it doesn't know PPQ anymore.

sync with head.

Remove the requirement for $trap_tmp_save to be 2048 aligned. It's not
it for the sake of 4 instructions.

sync with head.

Sync with head.

Fix comment. %t1 is the syscall # not curlwp.

sync with head

sync with head.

Correct assembler syntax to load the correct (left) bits of a constant.

Inspired by OpenBSD.

merge ktrace-lwp.

Sync with HEAD. Here we go again...

in the trap handler for T_EMULATION traps, also check if the opcode is 0xe.
if it is, then the instruction is an FPU instruction and we must not check
bits 23-25 since they are not a UID field in this format.

this fixes the spurious SIGILLs sometimes triggered by xmpyu instructions.

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD

remove an extra instruction I added with an overzealous cut+paste.

flush the dcache after accessing pcb_fpregs.
we access it with the DTLB both on and off,
so we need to avoid bad cache aliases.

update for new gas syntax.  from Jochen Kunz.

update for LWPs, and some lite cleanup.

Make sure to include opt_foo.h if a defflag option FOO is used.

sync kqueue branch with HEAD

catch up with -current.

No longer use BTLB entries to map the entire address spaces of I/O subsystems,
since BTLB entries can be scarce and very little of an I/O subsystem normally
needs to be mapped.

Instead, the pmap now allows mappings of I/O space to be entered with
pmap_kenter_pa.  bus_space mappings for small amounts of I/O space (as for
virtually all devices) are made this way, with BTLB entries still used for
large mappings for things like framebuffers.

This has led to more and cleaned-up uses of bus_space(9) and has caused
some autoconf cleanup.  Also, kgdb is now attached and connected before
autoconfiguration, which is much earlier than before.

Converted the fault handlers for the PA7100LC and up to handle
mappings not marked TLB_NO_RW_ALIAS.

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.

catch up with -current.

catch up with -current on kqueue branch

file trap.S was added on branch gehenna-devsw on 2002-07-14 17:47:14 +0000

file trap.S was added on branch kqueue on 2002-06-23 17:37:06 +0000

Fixed some mixup between processor number and type name,
i.e., PCXT is PA7100, not PA7200.

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