Commit Graph

24 Commits

Author SHA1 Message Date
Warner Losh
1ff6c09714 Fix stupid typo 2008-04-04 18:22:16 +00:00
Warner Losh
aa037d58ea Take the first baby step towards unifying and cleaning up arminit():
- Pull all the code to deal with the trampoline stuff into one
	  centeralized place and use it from everywhere.
	- Some minor style tidiness

Reviewed by: tinguely
2008-04-03 16:44:50 +00:00
Konstantin Belousov
89b57fcf01 Fix for the panic("vm_thread_new: kstack allocation failed") and
silent NULL pointer dereference in the i386 and sparc64 pmap_pinit()
when the kmem_alloc_nofault() failed to allocate address space. Both
functions now return error instead of panicing or dereferencing NULL.

As consequence, vmspace_exec() and vmspace_unshare() returns the errno
int. struct vmspace arg was added to vm_forkproc() to avoid dealing
with failed allocation when most of the fork1() job is already done.

The kernel stack for the thread is now set up in the thread_alloc(),
that itself may return NULL. Also, allocation of the first process
thread is performed in the fork1() to properly deal with stack
allocation failure. proc_linkup() is separated into proc_linkup()
called from fork1(), and proc_linkup0(), that is used to set up the
kernel process (was known as swapper).

In collaboration with:	Peter Holm
Reviewed by:	jhb
2007-11-05 11:36:16 +00:00
Julian Elischer
ad1e7d285a Threading cleanup.. part 2 of several.
Make part of John Birrell's KSE patch permanent..
Specifically, remove:
Any reference of the ksegrp structure. This feature was
never fully utilised and made things overly complicated.
All code in the scheduler that tried to make threaded programs
fair to unthreaded programs.  Libpthread processes will already
do this to some extent and libthr processes already disable it.

Also:
Since this makes such a big change to the scheduler(s), take the opportunity
to rename some structures and elements that had to be moved anyhow.
This makes the code a lot more readable.

The ULE scheduler compiles again but I have no idea if it works.

The 4bsd scheduler still reqires a little cleaning and some functions that now do
ALMOST nothing will go away, but I thought I'd do that as a separate commit.

Tested by David Xu, and Dan Eischen using libthr and libpthread.
2006-12-06 06:34:57 +00:00
Alan Cox
cc0d48ffb6 Eliminate unused global variables. 2006-11-11 20:57:52 +00:00
John Birrell
8460a577a4 Make KSE a kernel option, turned on by default in all GENERIC
kernel configs except sun4v (which doesn't process signals properly
with KSE).

Reviewed by:	davidxu@
2006-10-26 21:42:22 +00:00
Olivier Houchard
49953e11d7 Rewrite ARM_USE_SMALL_ALLOC so that instead of the current behavior, it maps
whole the physical memory, cached, using 1MB section mappings. This reduces
the address space available for user processes a bit, but given the amount of
memory a typical arm machine has, it is not (yet) a big issue.
It then provides a uma_small_alloc() that works as it does for architectures
which have a direct mapping.
2006-08-08 20:59:38 +00:00
Olivier Houchard
c1bfc47fa7 Now that we use pmap_mapdev_boostrap(), we can get ride of the got_mmu
hack.

Submitted by:	kevlo
2006-06-07 11:28:17 +00:00
Olivier Houchard
d661dc8070 Convert the last offender, the SA1110 port, to ARM32_NEW_VM_LAYOUT, and
completely nuke the !ARM32_NEW_VM_LAYOUT case.
2006-06-06 21:06:57 +00:00
Olivier Houchard
29d1651fc5 The Assabet has 32MB of RAM, not 16.
Submitted by:	kevlo
2006-05-30 15:47:55 +00:00
Olivier Houchard
ec4c4a14f5 Uncomment the call to cpu_idcache_wbinv_all() after the MMU has been
enabled. It has been commented out for a reason I forgot but I suspect
does not apply anymore.
Technically speaking it's not required to do it, has the data and the
instruction cache have been disabled in _start(). However, it may change
in the future, so I don't want to rely on this behavior.

Submitted by:	kevlo
2006-05-30 11:51:58 +00:00
Olivier Houchard
c212f0efe9 Remove any reference to enable_mmu(), it's been gone for a long time.
Submitted by:	kevlo
2006-05-26 01:41:47 +00:00
Olivier Houchard
fb350a0d6a Use pmap_devmap_bootstrap(), instead of mapping the SACOM1 registers
with pmap_map_entry.
More use of macros instead of hardcoding the addr.

Submitted by:	kevlo
2006-05-23 12:14:14 +00:00
Olivier Houchard
9c8c02e7a0 Use macros instead of hardcoding the address for SACOM1. Also don't
pretend we're working with SACOM3, as we're really mapping SACOM1.

Submitted by:   kevlo
2006-05-22 23:25:34 +00:00
Olivier Houchard
b834efd591 Provide a dump_avail[] variable, which contains the page ranges to be
dumped.

For iq31244_machdep.c, attempt to recognize hints provided by the elf
trampoline.
2005-10-03 14:15:50 +00:00
Warner Losh
d8315c79d9 Start all license statements with /*- 2005-01-05 21:58:49 +00:00
Olivier Houchard
885dabe5f7 Update the StrongArm port to match the current code.
- Implement arm_mask_irqs and arm_unmask_irqs
- Provide the available physical address range after pmap_bootstrap allocated
things, instead or before, or bad things happen.
2004-12-18 17:58:49 +00:00
Olivier Houchard
579d53f4cf Get the kernel stack right now that the u-area is gone. 2004-11-20 16:51:32 +00:00
David Schultz
11111b709f U areas are going away, so don't allocate one for process 0.
Reviewed by:	arch@
2004-11-20 02:29:25 +00:00
Olivier Houchard
ed4dc69883 Use MD_ROOT_SIZE, instead of our own macro. 2004-10-11 14:41:38 +00:00
Olivier Houchard
8413603da8 Now that we have pmap_growkernel(), use more KVA. 2004-09-23 22:32:33 +00:00
Julian Elischer
ed062c8d66 Refactor a bunch of scheduler code to give basically the same behaviour
but with slightly cleaned up interfaces.

The KSE structure has become the same as the "per thread scheduler
private data" structure. In order to not make the diffs too great
one is #defined as the other at this time.

The KSE (or td_sched) structure is  now allocated per thread and has no
allocation code of its own.

Concurrency for a KSEGRP is now kept track of via a simple pair of counters
rather than using KSE structures as tokens.

Since the KSE structure is different in each scheduler, kern_switch.c
is now included at the end of each scheduler. Nothing outside the
scheduler knows the contents of the KSE (aka td_sched) structure.

The fields in the ksegrp structure that are to do with the scheduler's
queueing mechanisms are now moved to the kg_sched structure.
(per ksegrp scheduler private data structure). In other words how the
scheduler queues and keeps track of threads is no-one's business except
the scheduler's. This should allow people to write experimental
schedulers with completely different internal structuring.

A scheduler call sched_set_concurrency(kg, N) has been added that
notifies teh scheduler that no more than N threads from that ksegrp
should be allowed to be on concurrently scheduled. This is also
used to enforce 'fainess' at this time so that a ksegrp with
10000 threads can not swamp a the run queue and force out a process
with 1 thread, since the current code will not set the concurrency above
NCPU, and both schedulers will not allow more than that many
onto the system run queue at a time. Each scheduler should eventualy develop
their own methods to do this now that they are effectively separated.

Rejig libthr's kernel interface to follow the same code paths as
linkse for scope system threads. This has slightly hurt libthr's performance
but I will work to recover as much of it as I can.

Thread exit code has been cleaned up greatly.
exit and exec code now transitions a process back to
'standard non-threaded mode' before taking the next step.
Reviewed by:	scottl, peter
MFC after:	1 week
2004-09-05 02:09:54 +00:00
Olivier Houchard
612246d6ac Nuke dead code. 2004-06-17 17:52:12 +00:00
Olivier Houchard
6fc729af63 Import FreeBSD/arm kernel bits.
It only supports sa1110 (on simics) right now, but xscale support should come
soon.
Some of the initial work has been provided by :
Stephane Potvin <sepotvin at videotron.ca>
Most of this comes from NetBSD.
2004-05-14 11:46:45 +00:00