CVS log for src/sys/arch/vax/include/cpu.h

Up to [cvs.NetBSD.org] / src / sys / arch / vax / include

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Keyword substitution: kv
Default branch: MAIN

Pull up following revision(s) (requested by kalvisd in ticket #509):

	sys/arch/vax/include/cpu.h: revision 1.108

vax: PR port-vax/55415

    Remove VAX-specific workaround to force pre-emption, as it is now
    no longer needed.

    tested by oster@

vax: PR port-vax/55415

    Remove VAX-specific workaround to force pre-emption, as it is now
    no longer needed.

    tested by oster@

Pull up following revision(s) (requested by oster in ticket #365):

	sys/arch/vax/include/cpu.h: revision 1.107

With the overhaul of the scheduler code the semantics of
ci_want_resched have changed, and for some reason vax
still requires ci_want_resched set to 1 in order to do
preemption.  This commit contains a workaround for the
preemption issued discussed in PR#55415.

With the overhaul of the scheduler code the semantics of
ci_want_resched have changed, and for some reason vax
still requires ci_want_resched set to 1 in order to do
preemption.  This commit contains a workaround for the
preemption issued discussed in PR#55415.

XXX pullup-10

Support save/restore of AST levels in the PCB for context switching.

Code written by ragge@ , tested by oster@.

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.

Merge changes from current as of 20200406

Fix false sharing problems with cpu_info.  Identified with tprof(8).
This was a very nice win in my tests on a 48 CPU box.

- Reorganise cpu_data slightly according to usage.
- Put cpu_onproc into struct cpu_info alongside ci_curlwp (now is ci_onproc).
- On x86, put some items in their own cache lines according to usage, like
  the IPI bitmask and ci_want_resched.

cpu_need_resched():

- Remove all code that should be MI, leaving the bare minimum under arch/.
- Make the required actions very explicit.
- Pass in LWP pointer for convenience.
- When a trap is required on another CPU, have the IPI set it locally.
- Expunge cpu_did_resched().

Sync with HEAD

Sync with HEAD

Resolve a couple of conflicts (result of the uimin/uimax changes)

- 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.

update from HEAD

Sync with HEAD

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

PR kern/39714 by Henning Petersen

Update copyright notice for Ludd (remove clause 3 & 4).

Rebase to HEAD as of a few days ago.

Rebase.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

Implement MI IPI interface with cross-call support.

sync with head

use __unused instead of __USE and void cast to mark iterator variable unused
where needed (from phone)

__USE cii

make cpu_need_resched() macros consistent; __USE flags

Resync to 2012-11-19 00:00:00 UTC

sync with head

split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

Pull up following revision(s) (requested by abs in ticket #1780):
	sys/arch/vax/include/cpu.h: revision 1.94 via patch
Change cpu_idle to be an inline which sets IPL to 1 and then back to 0
so simh can recognize the kernel is idle.

Pull up following revision(s) (requested by abs in ticket #407):
	sys/arch/vax/include/cpu.h: revision 1.94
Change cpu_idle to be an inline which sets IPL to 1 and then back to 0
so simh can recognize the kernel is idle.

sync with head

sync to -current

sync to -current

sync to latest -current.

Change cpu_idle to be an inline which sets IPL to 1 and then back to 0
so simh can recognize the kernel is idle.

Catchup with rmind-uvmplock merge.

sync with head

Sync with HEAD.

device_t, cfdata_t, etc.
CFATTACH_DECL -> CFATTACH_DECL_NEW for sizeof(struct device).

sync with head

Support LWP_PC

sync with head

Switch to use <sys/device_if.h>

Implement CAS using a RAS for non-MP VAX systems.  This technique uses the
atomicity of indirect addressing for correctness.  It also uses the knowledge
of dereferencing an address outside the page table length will cause a PTELEN
trap.  [Tested on netbsd-5]

Sync with HEAD.

sync with head.

sync with head

A big bunch of bugfixes from Johnny Billquist. Highlights:
- Makes the VAX8600 work as expected (500kg of hardware :-)
- Fix a hard-tracked bug causing VAXen to hang at splhigh.

Implement high priority (XC_HIGHPRI) xcall(9) mechanism - a facility
to execute functions from software interrupt context, at SOFTINT_CLOCK.
Functions must be lightweight.  Will be used for passive serialization.

OK ad@.

sync with head

Remove `volatile' qualifier from argument types of
struct timeval passed to todr_gettime(9) and todr_settime(9).
We no longer have an ancient and volatile struct timeval `time'
global since we have switched to MI timercounter(9) on all port.

XXX1: some of these RTC drivers still assume 32bit time_t
XXX2: some of these should be rewritten to use todr_[gs]ettime_ymdhms()
XXX3: todr(9) man page doesn't mention todr_[gs]ettime_ymdhms()

Provide cpu_lwp_free* stubs in vax and powerpc.
Reported by <he>.

Sync with HEAD.

sync with head.

sync with HEAD

sync with head.

Rototill the vax code.  Switch to devicet/PRIV_ALLOC.  Cleanup vax autoconf
code.  Move to prototype definitions.  staticfy, constify, avoid casting.
Use device_* accessors.

Remove CTL_MACHDEP_NAMES, it's not used anywhere.

Ok by martin@.

sync with head.

A number of performance changes:
Change internal register SSP to contain curlwp insread curcpu().  This
shrinks the GENERIC by 2KB.
Add rwlock stubs (rw_enter, rw_exit, rw_tryenter).
Simplify simple lock code for uniprocessors.
Do SPL raise/lower in cpu_handle_ipi instead of simple_locks.

Make NetBSD/vax work again.  Add support for __HAVE_FAST_SOFTINTS.
Add a few small optimizations.

Sync with HEAD.

sync with head.

Add cpu_intr_p (checks PSL_IS in PSL).
Change badaddr to take a volatile pointer

sync with head

sync with HEAD

Sync with HEAD

Don't need sys/lock.h

sync with HEAD

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

Sync with HEAD.

ci_need_resched -> ci_want_resched

sync with head.

Sync with head.

Sync with head.

Update to HEAD.

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.

Remove ci_exit, remove idlepcb and exitstack.

Not quite functional idlelwp adaption for VAX.  lwp fork works but the
kernel never seems to return/stay in usermode.

Sync with HEAD.

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

sync with head.

Partially adapt the VAX port to the newlock2 changes.  These are untested
but they do at least compile.

sync with head.

sync with head.

sync with head

Switch VAX over to generic TODR

sync with head.

Sync with head.

sync with head - hopefully this will work

sync with head.

Merge 2006-03-31 NetBSD-current into the "peter-altq" branch.

Add a comment indicating that the cpuid (derived from the autoconfiguration
unit number of the CPU) should be cached in the cpu_info.

merge ktrace-lwp.

Sync with HEAD. Here we go again...

Fixes to make GENERIC.MP build again.  Several changes:
 o Rename global variable "tramp" to "vax_mp_tramp" to avoid warning
   with -Wshadow when compiling the signal code.
 o Rename a macro-local variable _s to __s in __cpu_simple_lock()
   to avoid -Wshadow warning when MALLOC() is used (also declares _s).
 o Follow up -Wcast-qual by making a number of function arguments const char*
   where string literals are used.

Sync with HEAD.

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

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD

Add CPU_INFO_INTERATOR/FOREACH support.

Add #define cpu_lwp_free do { } while (/*CONSTCOND*/0)
(VAX systems don't need to do anything in cpu_lwp_free)

Rearrange process exit path to avoid need to free resources from different
process context ('reaper').

From within the exiting process context:
* deactivate pmap and free vmspace while we can still block
* introduce MD cpu_lwp_free() - this cleans all MD-specific context (such
  as FPU state), and is the last potentially blocking operation;
  all of cpu_wait(), and most of cpu_exit(), is now folded into cpu_lwp_free()
* process is now immediatelly marked as zombie and made available for pickup
  by parent; the remaining last lwp continues the exit as fully detached
* MI (rather than MD) code bumps uvmexp.swtch, cpu_exit() is now same
  for both 'process' and 'lwp' exit

uvm_lwp_exit() is modified to never block; the u-area memory is now
always just linked to the list of available u-areas. Introduce (blocking)
uvm_uarea_drain(), which is called to release the excessive u-area memory;
this is called by parent within wait4(), or by pagedaemon on memory shortage.
uvm_uarea_free() is now private function within uvm_glue.c.

MD process/lwp exit code now always calls lwp_exit2() immediatelly after
switching away from the exiting lwp.

g/c now unneeded routines and variables, including the reaper kernel thread

Add machdep sysctl support.  Support booted_device, consdev, and
printfataltraps.

Need to forward declare struct buf and struct pte for function prototypes.

Merge the nathanw_sa branch.

sync kqueue with -current; this includes merge of gehenna-devsw branch,
merge of i386 MP branch, and part of autoconf rototil work

Catch up to -current.

Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

	device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
  by using this grammer.

- Added the new naming convention.
  The name of the device switch must be <prefix>_[bc]devsw for auto-generation
  of device switch tables.

- The backward compatibility of loading block/character device
  switch by LKM framework is broken. This is necessary to convert
  from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
  We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
  the LKM framework will refer it to assign device major number dynamically.

Curproc->curlwp renaming.

Change uses of "curproc->l_proc" back to "curproc", which is more like the
original use. Bare uses of "curproc" are now "curlwp".

"curproc" is now #defined in proc.h as ((curlwp) ? (curlwp)->l_proc) : NULL)
so that it is always safe to reference curproc (*de*referencing curproc
is another story, but that's always been true).

Remove unnecessary prototype.

Catch up to -current.
(CVS: It's not just a program. It's an adventure!)

Initial nathanw_sa kernel support for vax.

Catch up with -current.

Major update of the vax pmap:
	- Reinstall the "dynamic page table length" that was removed some
	  years ago.
	- Limit the user page table submap to max 5% of available memory.
	- Free the page table space when a process is swapped out.
	- If the UPT submap runs out of space, throw away pmap mappings
	  using the same algorithm as for swapping processes.

As a result of this, 4MB machines are useable again and it's even possible
to compile a kernel for 2MB machines (but it will be slow... :-)

Still to do:
	- Multiprocessor fixes.
	- More profiling.

Catch up to -current.

file cpu.h was added on branch nathanw_sa on 2002-03-29 23:31:42 +0000

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

Add rudimentary multiprocessor support for DDB.

Add IPI_TBIA to flush the translation buffer.

Break out the MP-dependent calls. Add definitions for the IPI functions.

use _KERNEL_OPT

Add ci_cpuid.
Change the CLKF_ macros because the idle loop is now running at IPL1.

Sync with HEAD.

Add prototype.

Update thorpej_scsipi to -current as of a month ago
A i386 GENERIC kernel compiles without the siop, ahc and bha drivers
(will be updated later). i386 IDE/ATAPI and ncr work, as well as
sparc/esp_sbus. alpha should work as well (untested yet).
siop, ahc and bha will be updated once I've updated the branch to current
-current, as well as machine-dependant code.

Make need_resched() take a "struct cpu_info *" argument.  This
causes gives a primitive form of processor affinity.  Its use in
roundrobin() still needs some work.

Add badaddr() field.

Sync w/ netbsd-1-5-base.

Allow printf's from slave CPUs by stealing the v_putc function.
Easier than expected because the printout lock is hold in the higher levels.

Code to spin up other CPUs on a VAX 8200 system.
Haven't solved the printf() problem yet, though.

Move spl macros from <machine/param.h> to <machine/intr.h>
Fix botch on my part and make the IPL_* match reality on VAX.
Redefine spl macro using the symbolic IPL_ instead of being hardcoded.
Move schedsoftnet, schedsoftclock from <machine/cpu.h> to <machine/intr.h>
Add a _setsirr macro for schedsoft*.
Add softintr function and framework.

Eliminate booted_from.  extern'ed booted_device (for raidframe).  nothing
outside autoconf.c in sys/arch/vax needs to deal with booted_device).

Use the cpu_info struct to store cpu-specific data in the same way in
both uniprocessor and multiprocessor environments. Use the otherwise
unused internal CPU register SSP to store the cpu_info pointer.
The macros curcpu(), curproc, cpu_number() and need_resched() are now the
same in both uniprocessor and multiprocessor environments.

Rewrite cpu_fork(), it now looks like and works as other ports' cpu_fork()
(calling child_return() etc...). Have fun, Jason!

This need <sys/sched.h> to compile.

First sweep at scheduler state cleanup.  Collect MI scheduler
state into global and per-CPU scheduler state:

	- Global state: sched_qs (run queues), sched_whichqs (bitmap
	  of non-empty run queues), sched_slpque (sleep queues).
	  NOTE: These may collectively move into a struct schedstate
	  at some point in the future.

	- Per-CPU state, struct schedstate_percpu: spc_runtime
	  (time process on this CPU started running), spc_flags
	  (replaces struct proc's p_schedflags), and
	  spc_curpriority (usrpri of processes on this CPU).

	- Every platform must now supply a struct cpu_info and
	  a curcpu() macro.  Simplify existing cpu_info declarations
	  where appropriate.

	- All references to per-CPU scheduler state now made through
	  curcpu().  NOTE: this will likely be adjusted in the future
	  after further changes to struct proc are made.

Tested on i386 and Alpha.  Changes are mostly mechanical, but apologies
in advance if it doesn't compile on a particular platform.

Add prototype for findcpu in _STANDALONE.

Ops, forgot to commit this.

First cut of multiprocessor support for vax. Still much to do before
other CPUs than the master can spin up.

Pull up to last week's -current.

Sync with -current

Protect against multiple includes.

Centralize the declaration and clearing of `cold'.

Define cpu_number() as discussed on tech-smp.

Clean up all bus handling stuff, it has become a mess the latest years.
Add a new bus; "ibus" that is the internal MicroVAX bus.

Sync w/ -current.

Better and more understandable way to find out CPU type.

Real-time clock is started on the same way on all CPUs, there is no
need for a special CPU-dependent hook for this.

Use "access_type" in pmap_enter() more intelligent.
Allocate device register space bigger than the logical page size
from the kernel map, thus decreasing the pre-allocated page table memory.

Another giant change: Allocate register space dynamic instead of compiled-in.
This is done on a physical page size basis, instead of virtual (as the
(on vax yet non-existing) bus_* routines does). This is similar to the
way uba allocation is done.

Allocate (almost) all interrupt vectors dynamically. Simplifies much
work when adding support for new machines and devices.

Latent support for revamped "local bus" support.

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

cpu_set_kpc() prototype is already in <sys/systm.h>.

Basic support for VS4000/60.

#ifdef _KERNEL whole this file.

Remove unnecessary code for interrupt vector handling.

Wall cleaning.

Fix clearing of redundant restart flag; CPU specific.
Also clean up a bit.

Actually do 'halt' or 'reboot' on MicroVAX.

Add definitions for DEC HW device numbers.

Merge in changes from Trunk

Basic change to cpu-config code. This will make support of new
cpu types much easier.

Remove bogus prototypes.

Update prototypes to match new calling convention of functions that
find the boot device.

Snapshot of work-in-progress, committed to private branch.

These changes implement machine-independent root device and file system
selection.  Notable features:

	- All ports behave in a consistent manner regarding root
	  device selection.
	- No more "options GENERIC"; all kernels have the ability
	  to boot with RB_ASKNAME to select root device and file system
	  type.
	- Root file system type can be wildcarded; a machine-independent
	  function will try all possible file systems for the selected
	  root device until one succeeds.
	- If the root file system fails to mount, the operator will
	  be given the chance to select a new root device and file
	  system type, rather than having the machine simply panic.
	- nfs_mountroot() no longer panics if any part of the NFS
	  mount process fails; it now returns an error, giving the
	  operator a chance to recover.
	- New, more consistent, config(8) grammar.  The constructs:

		config netbsd swap generic
		config netbsd root on nfs

	  have been replaced with:

		config netbsd root on ? type ?
		config netbsd root on ? type nfs

	  Additionally, the operator may select or wildcard root file
	  system type in the kernel configuration file:

		config netbsd root on cd0a type cd9660

	  config(8) now requires that a "root" specification be
	  made.  "root" may be wired down or wildcarded.  "swap" and
	  "dump" specifications are optional, and follow previous
	  semantics.

	- config(8) has a new "file-system" keyword, used to configure
	  file systems into the kernel.  Eventually, this will be used
	  to generate the default vfssw[].

	- "options NFSCLIENT" is obsolete, and is replaced by
	  "file-system NFS".  "options NFSSERVER" still exists, since
	  NFS server support is independent of the NFS file system
	  client.

	- sys/arch/<foo>/<foo>/swapgeneric.c is no longer used, and
	  will be removed; all information is now generated by config(8).

As of this commit, all ports except arm32 have been updated to use
the new setroot().  Only SPARC, i386, and Alpha ports have been
tested at this time.  Port masters should test these changes on their
ports, and report any problems back to me.

More changes are on their way, including RB_ASKNAME support in
nfs_mountroot() (to prompt for server address and path) and, potentially,
the ability to select rarp/bootparam or bootp in nfs_mountroot().

Numerous changes to be able to put Bertram Barth's VAXstation support in.
(Some) Support for VAXstation 2000/MicroVAX 2000, VAXstation 3100/76.

Automatic changing of root device after boot now works.

Fixed all (proto)type errors. Fixes PR 2377.

Added prototypes to everything. Made all files compile with -Wall.

Changes due to 11/780 support. Raise splimp() to BR7.

Fix #includes.

MicroVAX III support added.

New file pcb.h. USRTEXT changed to 0x400.

BROKEN_SWAP removed, swapping verified OK.
pmap_collect(pmap) added as null define.

Removed cpu_set_init_frame() use.
Increased default limits of memory use, ridiculously small before.

define BROKEN_SWAP and/or cpu_swapout as appropriate.

mtpr support for 11/780 added. DELAY added. mcount() corrected.
trapframe fixed to support all registers.

Some bug fixes & update of pcb.

Def's for uVAXII added.

Lots of fixes...

Lots of updates & fixes.

new RCS ID format.

Changes to make files more 4.4/1.0B working.

Initial VAX port merging.

file cpu.h was added on branch netbsd-1-0 on 1994-08-02 20:20:14 +0000

Initial VAX port merging.