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Commit Graph

1647 Commits

Author SHA1 Message Date
Bruce Evans
7762bc7bdf Fixed breakage of the !SMP case in vm_page_zero_idle() in the
previous commit.  Opportunities to clean pages were often missed,
and leaving of the idle state was sometimes delayed until the next
interrupt (after any that occurred while cleaning).

Fixed an unstaticization, a syntax error and a style bug in the
previous commit.
1998-03-12 09:55:57 +00:00
Bruce Evans
d1d9d2601f Don't depend on "implicit int" or bloat the data section in the
declaration of mem_devsw_installed.

Reduced include nesting.
1998-03-12 09:14:18 +00:00
Eivind Eklund
005092bba6 Turn "PMAP_SHPGPERPROC" into a new-style option, add it to LINT, and
document it there.
1998-03-09 22:09:13 +00:00
Mike Smith
72928bdadb "Correct behaviour" involves being consistent with the canonical names of
other partitions.  In this case, they appear in the first slice in the
WHOLE_DISK_SLICE case.
1998-03-09 08:35:33 +00:00
Mike Smith
34ef5a9d25 Merge from 2.2; behave correctly in the presence of a slice number that
doesn't directly correspond to the slice field in the device minor number.
1998-03-09 08:10:21 +00:00
Mike Smith
f2dddd5e99 Construct the minor number for the root device taking into account the
slice number passed in by the bootblocks.  This means the kernel will
not use the compatability slice to obtain the root filesystem when
booting from a sliced disk.

Use the extraction macros from reboot.h rather than stating them in full
again.
1998-03-08 15:06:55 +00:00
John Dyson
8f9110f6a1 This mega-commit is meant to fix numerous interrelated problems. There
has been some bitrot and incorrect assumptions in the vfs_bio code.  These
problems have manifest themselves worse on NFS type filesystems, but can
still affect local filesystems under certain circumstances.  Most of
the problems have involved mmap consistancy, and as a side-effect broke
the vfs.ioopt code.  This code might have been committed seperately, but
almost everything is interrelated.

1)	Allow (pmap_object_init_pt) prefaulting of buffer-busy pages that
	are fully valid.
2)	Rather than deactivating erroneously read initial (header) pages in
	kern_exec, we now free them.
3)	Fix the rundown of non-VMIO buffers that are in an inconsistent
	(missing vp) state.
4)	Fix the disassociation of pages from buffers in brelse.  The previous
	code had rotted and was faulty in a couple of important circumstances.
5)	Remove a gratuitious buffer wakeup in vfs_vmio_release.
6)	Remove a crufty and currently unused cluster mechanism for VBLK
	files in vfs_bio_awrite.  When the code is functional, I'll add back
	a cleaner version.
7)	The page busy count wakeups assocated with the buffer cache usage were
	incorrectly cleaned up in a previous commit by me.  Revert to the
	original, correct version, but with a cleaner implementation.
8)	The cluster read code now tries to keep data associated with buffers
	more aggressively (without breaking the heuristics) when it is presumed
	that the read data (buffers) will be soon needed.
9)	Change to filesystem lockmgr locks so that they use LK_NOPAUSE.  The
	delay loop waiting is not useful for filesystem locks, due to the
	length of the time intervals.
10)	Correct and clean-up spec_getpages.
11)	Implement a fully functional nfs_getpages, nfs_putpages.
12)	Fix nfs_write so that modifications are coherent with the NFS data on
	the server disk (at least as well as NFS seems to allow.)
13)	Properly support MS_INVALIDATE on NFS.
14)	Properly pass down MS_INVALIDATE to lower levels of the VM code from
	vm_map_clean.
15)	Better support the notion of pages being busy but valid, so that
	fewer in-transit waits occur.  (use p->busy more for pageouts instead
	of PG_BUSY.)  Since the page is fully valid, it is still usable for
	reads.
16)	It is possible (in error) for cached pages to be busy.  Make the
	page allocation code handle that case correctly.  (It should probably
	be a printf or panic, but I want the system to handle coding errors
	robustly.  I'll probably add a printf.)
17)	Correct the design and usage of vm_page_sleep.  It didn't handle
	consistancy problems very well, so make the design a little less
	lofty.  After vm_page_sleep, if it ever blocked, it is still important
	to relookup the page (if the object generation count changed), and
	verify it's status (always.)
18)	In vm_pageout.c, vm_pageout_clean had rotted, so clean that up.
19)	Push the page busy for writes and VM_PROT_READ into vm_pageout_flush.
20)	Fix vm_pager_put_pages and it's descendents to support an int flag
	instead of a boolean, so that we can pass down the invalidate bit.
1998-03-07 21:37:31 +00:00
Tor Egge
1146c3560f The APs now reload the interrupt descriptor table pointer after
f00f_hack has run.

Use the global r_idt descriptor in f00f_hack when in SMP mode,
so the APs find the relocated interrupt descriptor table.

Submitted by:	Partially from David A Adkins <adkin003@tc.umn.edu>
1998-03-07 20:16:49 +00:00
Tor Egge
5dd528cd4e Remove special handling for resuming clock interrupt when using APIC_IO.
The `generic' vector stubs do the right thing.
1998-03-05 21:45:53 +00:00
Tor Egge
622a086be3 Use t_idt instead of idt inside setidt() if f00f_hack() has relocated the IDT.
Submitted by:	Bruce Evans <bde@zeta.org.au>
1998-03-05 19:37:03 +00:00
KATO Takenori
3a94cb7f7d Defined CCR6 and CCR7 (configuration registers of M2 CPU.) 1998-03-04 11:39:16 +00:00
Peter Dufault
f3df61a1cd Reviewed by: msmith, bde long ago
Fix for RTPRIO scheduler to eliminate invalid context switches.
1998-03-04 10:25:03 +00:00
Tor Egge
02c1dc3bbc When entering the apic version of slow interrupt handler, level
interrupts are masked, and EOI is sent iff the corresponding ISR bit
is set in the local apic. If the CPU cannot obtain the interrupt
service lock (currently the global kernel lock) the interrupt is
forwarded to the CPU holding that lock.

Clock interrupts now have higher priority than other slow interrupts.
1998-03-03 22:56:30 +00:00
Tor Egge
3163861c7b Forward the signal if the process runs on a different CPU. This reduces
the signal handling latency for cpu-bound processes that performs very
few system calls.

The IPI for forcing an additional software trap is no longer dependent upon
BETTER_CLOCK being defined.
1998-03-03 20:55:26 +00:00
Tor Egge
fe9cd27373 Reduce timeout before assuming that forwarding of hardclock or softclock
failed. Don't complain on forwarding failure, unless
BETTER_CLOCK_DIAGNOSTIC is defined.
1998-03-03 20:09:14 +00:00
Tor Egge
221e0c595b forward_statclock and forward_hardclock are located in mp_machdep.c. 1998-03-03 19:44:34 +00:00
Peter Wemm
c8a7999933 Update the ELF image activator to use some of the exec resources rather
than rolling it's own.  This means that it now uses the "safe"
exec_map_first_page() to get the ld.so headers rather than risking a panic
on a page fault failure (eg: NFS server goes down).
Since all the ELF tools go to a lot of trouble to make sure everything
lives in the first page for executables, this is a win.  I have not seen
any ELF executable on any system where all the headers didn't fit in the
first page with lots of room to spare.
I have been running variations of this code for some time on my pure ELF
systems.
1998-03-02 05:47:58 +00:00
John Dyson
ffc82b0a70 1) Use a more consistent page wait methodology.
2)	Do not unnecessarily force page blocking when paging
	pages out.
3)	Further improve swap pager performance and correctness,
	including fixing the paging in progress deadlock (except
	in severe I/O error conditions.)
4)	Enable vfs_ioopt=1 as a default.
5)	Fix and enable the page prezeroing in SMP mode.

All in all, SMP systems especially should show a significant
improvement in "snappyness."
1998-03-01 04:18:54 +00:00
Poul-Henning Kamp
3301c800f5 Prevent the TSC from being used on APM machines, we have no idea if
it runs at a constant frequency.  This was less of an issue before,
because the TSC only interpolated in the HZ intervals, but now where
the timecounter is used all the way, this becomes much more visible.

Nit: Fix a printf which triggered the bde-filter.
1998-02-28 21:16:13 +00:00
John Dyson
660957521c Fix page prezeroing for SMP, and fix some potential paging-in-progress
hangs.  The paging-in-progress diagnosis was a result of Tor Egge's
excellent detective work.
Submitted by:	Partially from Tor Egge.
1998-02-25 03:56:15 +00:00
Bruce Evans
6aeb4f6474 Removed vestiges of previous microtime() implementation. 1998-02-25 02:20:30 +00:00
John Dyson
d9bed5bee1 Try to dynamically size the VM_KMEM_SIZE (but is still able to be overridden
in a way identically as before.)  I had problems with the system properly
handling the number of vnodes when there is alot of system memory, and the
default VM_KMEM_SIZE.  Two new options "VM_KMEM_SIZE_SCALE" and
"VM_KMEM_SIZE_MAX" have been added to support better auto-sizing for systems
with greater than 128MB.

Add some accouting for vm_zone memory allocations, and provide properly
for vm_zone allocations out of the kmem_map.  Also move the vm_zone
allocation stats to the VM OID tree from the KERN OID tree.
1998-02-23 07:42:43 +00:00
Bruce Evans
168be6199e Quick fix for the i8254 timecounter often gaining 10 msec. 1998-02-23 00:11:25 +00:00
Jordan K. Hubbard
6bf2dcfc50 Add missing CLOCK_UNLOCK() before write_eflags().
Submitted by:	dave adkins <adkin003@tc.umn.edu>
1998-02-21 20:45:27 +00:00
Poul-Henning Kamp
7ec73f6417 Replace TOD clock code with more systematic approach.
Highlights:
    * Simple model for underlying hardware.
    * Hardware basis for timekeeping can be changed on the fly.
    * Only one hardware clock responsible for TOD keeping.
    * Provides a real nanotime() function.
    * Time granularity: .232E-18 seconds.
    * Frequency granularity:  .238E-12 s/s
    * Frequency adjustment is continuous in time.
    * Less overhead for frequency adjustment.
    * Improves xntpd performance.

Reviewed by:    bde, bde, bde
1998-02-20 16:36:17 +00:00
Bruce Evans
39e4376ba7 Removed unused #includes. 1998-02-20 13:11:54 +00:00
Mike Smith
42be88e88d Remove DISABLE_PSE option which was masking (but not fixing) the problem.
A correct fix for execution off MFS filesystems has been committed.
1998-02-16 23:57:03 +00:00
Mike Smith
354f83d34f TEMPORARILY disable support for the 4MB kernel page, as it appears to be
causing installation images for -current to be unbootable.

Submitted by:	phk
1998-02-16 00:29:05 +00:00
Bruce Evans
ee10b2a475 Removed a superstitious fnop() that broke the usefulness of the FPU's
"last instruction" pointer.
1998-02-15 06:25:26 +00:00
KATO Takenori
53a76bb7ed Use RDMSR instruction instead of WRMSR. 1998-02-13 09:34:42 +00:00
Bruce Evans
359888780e Ifdefed SMP-only declarations. 1998-02-13 06:59:22 +00:00
Bruce Evans
1d804e7925 Update timer0_prescaler_count before calling hardclock() while timer0
is "acquired".  This fixes a TSC biasing error of about 10 msec when
pcaudio is active.

Update `time' before calling hardclock() when timer0 is being released.
This is not known to be important.

Added some delays in writertc().  Efficiency is not critical here, unlike
in rtcin(), and we already use conservative delays there.

Don't touch the hardware when machdep.i8254_freq is being changed but
the maximum count wouldn't change.  This fixes jitter of up to 10 msec
for most small adjustments to machdep.i8254_freq.  When the maximum
count needs to change, the hardware should be adjusted more carefully.
1998-02-13 06:33:16 +00:00
Bruce Evans
9f449d2aa2 Ifdefed some npx code. npx should be optional again. 1998-02-13 05:30:18 +00:00
Bruce Evans
9729f279db Fixed missing privilege checking and off-by-1 bounds checking in
i386_set_ioperm().  Don't use a magic number for the bound.

Fixed missing bounds checking in i386_get_ioperm().  Don't use a
magic number for the bound elsewhere in this function.

Removed some bogus initializers.
1998-02-13 05:25:37 +00:00
Bruce Evans
045b6fefd8 Fixed initialization of the 4MB page. Kernels larger than about 2.75MB
(from _btext to _end) crashed in pmap_bootstrap().  Smaller kernels
worked accidentally.
1998-02-12 22:00:01 +00:00
Bruce Evans
cd59d49d07 Only use the i586-optimized copying and zeroing functions if they are
actually faster (more than 20% faster for zeroing 1 MB at boot time).
This fixes pessimized copying and zeroing on K6's and perhaps on other
CPUs that are misclassified as i586's.
1998-02-12 21:41:10 +00:00
Eivind Eklund
b265178126 Fix warning after previous staticization. 1998-02-10 17:30:26 +00:00
Eivind Eklund
303b270b0a Staticize. 1998-02-09 06:11:36 +00:00
Eivind Eklund
5589ae9dfd Remove warnings from f00f_hack. 1998-02-09 04:45:53 +00:00
Eivind Eklund
0b08f5f737 Back out DIAGNOSTIC changes. 1998-02-06 12:14:30 +00:00
John Dyson
95461b450d 1) Start using a cleaner and more consistant page allocator instead
of the various ad-hoc schemes.
2)	When bringing in UPAGES, the pmap code needs to do another vm_page_lookup.
3)	When appropriate, set the PG_A or PG_M bits a-priori to both avoid some
	processor errata, and to minimize redundant processor updating of page
	tables.
4)	Modify pmap_protect so that it can only remove permissions (as it
	originally supported.)  The additional capability is not needed.
5)	Streamline read-only to read-write page mappings.
6)	For pmap_copy_page, don't enable write mapping for source page.
7)	Correct and clean-up pmap_incore.
8)	Cluster initial kern_exec pagin.
9)	Removal of some minor lint from kern_malloc.
10)	Correct some ioopt code.
11)	Remove some dead code from the MI swapout routine.
12)	Correct vm_object_deallocate (to remove backing_object ref.)
13)	Fix dead object handling, that had problems under heavy memory load.
14)	Add minor vm_page_lookup improvements.
15)	Some pages are not in objects, and make sure that the vm_page.c can
	properly support such pages.
16)	Add some more page deficit handling.
17)	Some minor code readability improvements.
1998-02-05 03:32:49 +00:00
Eivind Eklund
47cfdb166d Turn DIAGNOSTIC into a new-style option. 1998-02-04 22:34:03 +00:00
Eivind Eklund
7dff14331f Make FAILSAFE a new-style option. 1998-02-04 03:47:16 +00:00
Bruce Evans
44429dc4f7 Converted DISABLE_PSE to a new-style option.
Fixed some formatting in options.i386.
1998-02-03 22:09:01 +00:00
Bruce Evans
a8961a8284 Ifdefed some SMP and VM86 code. Note that although VM86 is not a global
option, the ifdef on it in a header works because only the name of the
VM86 extension is hidden.
1998-02-03 21:27:50 +00:00
Bruce Evans
318ed3ed7a Forward declare a union so that this file is self-sufficient.
Cleaned up ifdefs.
1998-02-03 20:46:18 +00:00
Bruce Evans
7a1a679ecb Ifdefed use of a GNU feature. 1998-02-03 20:32:38 +00:00
Bruce Evans
af3b301b36 Fixed disordering of busdma* and swi_vm. 1998-02-01 23:00:53 +00:00
Bruce Evans
e29b867bd6 Fixed a recently broken comment. 1998-02-01 22:45:23 +00:00
Bruce Evans
76d0502a56 Declare printf() instead of including <stdio.h>, so that this doesn't
depend on anything outside of "sys".

Removed an unused include.

Don't use `extern' in a function declaration.
1998-02-01 18:53:09 +00:00
John Dyson
eaf13dd73a Change the busy page mgmt, so that when pages are freed, they
MUST be PG_BUSY.  It is bogus to free a page that isn't busy,
because it is in a state of being "unavailable" when being
freed.  The additional advantage is that the page_remove code
has a better cross-check that the page should be busy and
unavailable for other use.  There were some minor problems
with the collapse code, and this plugs those subtile "holes."

Also, the vfs_bio code wasn't checking correctly for PG_BUSY
pages.  I am going to develop a more consistant scheme for
grabbing pages, busy or otherwise.  For now, we are stuck
with the current morass.
1998-01-31 11:56:53 +00:00
Eivind Eklund
3f2076daf5 Make the debug options new-style.
This also zaps a DPT option from lint; it wasn't referenced from
anywhere.
1998-01-31 07:23:16 +00:00
Eivind Eklund
e0d781f3a5 Make POWERFAIL_NMI, PPS_SYNC and NATM new style options.
This also fixes a couple of defunct options; submitted by bde.
1998-01-31 05:00:21 +00:00
Eivind Eklund
828084926f Skip probing devices which have already probed true. 1998-01-31 03:29:00 +00:00
Eivind Eklund
5212dc9c0b Include "opt_nfs.h"
Pointed out by: Eric L. Hernes <erich@lodgenet.com>
1998-01-31 02:53:41 +00:00
Poul-Henning Kamp
c5b193bfba Retire LFS.
If you want to play with it, you can find the final version of the
code in the repository the tag LFS_RETIREMENT.

If somebody makes LFS work again, adding it back is certainly
desireable, but as it is now nobody seems to care much about it,
and it has suffered considerable bitrot since its somewhat haphazard
integration.

R.I.P
1998-01-30 11:34:06 +00:00
John Dyson
0621c31aaf Make the bounce buffer code a little more robust when space isn't
available.  If there isn't bounce space available, the bounce code
is disabled.  This will allow most large systems to run properly
when the bounce space is mistakenly allocated above 16MB.
1998-01-30 10:26:26 +00:00
Poul-Henning Kamp
53dd848c82 APM calls inittodr(0) which is stupid, but at least stop setting the
clock back to when Dennis had a good idea.
1998-01-28 10:41:33 +00:00
KATO Takenori
5be975adf0 Execute cpuid if BIOS disables cpuid instruction of Cyrix 6x86MX CPU. 1998-01-27 08:12:09 +00:00
KATO Takenori
e881afe741 Undo previous commit. The cpuid symbol has been already used by SMP
stuff.

Pointed-out by:	Manfred Antar <root@mantar.slip.netcom.com>
1998-01-25 23:45:41 +00:00
KATO Takenori
31e6b13443 Added cpuid instruction. 1998-01-25 17:02:00 +00:00
KATO Takenori
2f5a8c876a Execute cpuid if BIOS disables cpuid instruction of Cyrix 6x86MX CPU,
and store its result into cpu_id and cpu_feature variables.

Tested by:	Simon Coggins <chaos@ultra.net.au>
1998-01-25 17:01:31 +00:00
KATO Takenori
88a92ff10e Even though BIOS writer's guide recommends cpuid instruction of Cyrix
6x86MX CPU is enabled (BIOS should not disable it), some BIOS disables
it via CCR4.  In this case, cpu variable becomes CPU_486 and
identblue() is called.  Because Cyrix 6x86MX has MSR and doesn't have
MSR1002, wrmsr instruction generates general protection fault.

Tested by:	Simon Coggins <chaos@ultra.net.au>
1998-01-25 12:01:38 +00:00
Eivind Eklund
7b778b5e61 Make all file-system (MFS, FFS, NFS, LFS, DEVFS) related option new-style.
This introduce an xxxFS_BOOT for each of the rootable filesystems.
(Presently not required, but encouraged to allow a smooth move of option *FS
to opt_dontuse.h later.)

LFS is temporarily disabled, and will be re-enabled tomorrow.
1998-01-24 02:54:56 +00:00
John Dyson
50ce7ff499 Add better support for larger I/O clusters, including larger physical
I/O.  The support is not mature yet, and some of the underlying implementation
needs help.  However, support does exist for IDE devices now.
1998-01-24 02:01:46 +00:00
John Dyson
2d8acc0f4a VM level code cleanups.
1)	Start using TSM.
	Struct procs continue to point to upages structure, after being freed.
	Struct vmspace continues to point to pte object and kva space for kstack.
	u_map is now superfluous.
2)	vm_map's don't need to be reference counted.  They always exist either
	in the kernel or in a vmspace.  The vmspaces are managed by reference
	counts.
3)	Remove the "wired" vm_map nonsense.
4)	No need to keep a cache of kernel stack kva's.
5)	Get rid of strange looking ++var, and change to var++.
6)	Change more data structures to use our "zone" allocator.  Added
	struct proc, struct vmspace and struct vnode.  This saves a significant
	amount of kva space and physical memory.  Additionally, this enables
	TSM for the zone managed memory.
7)	Keep ioopt disabled for now.
8)	Remove the now bogus "single use" map concept.
9)	Use generation counts or id's for data structures residing in TSM, where
	it allows us to avoid unneeded restart overhead during traversals, where
	blocking might occur.
10)	Account better for memory deficits, so the pageout daemon will be able
	to make enough memory available (experimental.)
11)	Fix some vnode locking problems. (From Tor, I think.)
12)	Add a check in ufs_lookup, to avoid lots of unneeded calls to bcmp.
	(experimental.)
13)	Significantly shrink, cleanup, and make slightly faster the vm_fault.c
	code.  Use generation counts, get rid of unneded collpase operations,
	and clean up the cluster code.
14)	Make vm_zone more suitable for TSM.

This commit is partially as a result of discussions and contributions from
other people, including DG, Tor Egge, PHK, and probably others that I
have forgotten to attribute (so let me know, if I forgot.)

This is not the infamous, final cleanup of the vnode stuff, but a necessary
step.  Vnode mgmt should be correct, but things might still change, and
there is still some missing stuff (like ioopt, and physical backing of
non-merged cache files, debugging of layering concepts.)
1998-01-22 17:30:44 +00:00
Jordan K. Hubbard
ec4f65d24f Add entries for tx card. 1998-01-21 18:34:47 +00:00
Justin T. Gibbs
44be5ce870 Add prototypes for swi_vm, setsoftvm, schedsoftvm, and splsoftvm that were
missed when I originally committed the bus dma code.
1998-01-21 18:28:49 +00:00
John Birrell
013239afdf Suggested by: bde
Move sigjmp_buf and jmp_buf structure definitions to machine/setjmp.h
so that i386 can continue to use int as the basic register type and
alpha can use long. Bruce was concerned about possible differing
alignment. I've left the definition of _JBLEN in machine/setjmp.h
even though Bruce's example used the number directly. I don't know if
any other code relies on _JBLEN, so I left it to avoid potential
breakage.
1998-01-20 09:09:24 +00:00
Tor Egge
95f67de2e3 The removal of a page from the free queue in vm_page_zero_idle was
imcomplete. Also set m->queue, in order to prevent vm_page_select_free
from selecting the page being zeroed.
1998-01-19 04:16:16 +00:00
John Dyson
4722175765 Tie up some loose ends in vnode/object management. Remove an unneeded
config option in pmap.  Fix a problem with faulting in pages.  Clean-up
some loose ends in swap pager memory management.

The system should be much more stable, but all subtile bugs aren't fixed yet.
1998-01-17 09:17:02 +00:00
Paul Traina
aaf862068b Bring in IDE ATAPI floppy support.
This is Junichi's v1.0 driver.

NOTE: Major device numbers have been changed to avoid conflict with other
      FreeBSD 3.0 devices.  The new numbers should be considered "official."
      This driver is still considered "beta" quality, although we have been
      playing with it.  Please submit bugs to junichi and myself.

Submitted by:	junichi@astec.co.jp
1998-01-16 22:13:07 +00:00
Justin T. Gibbs
99117bb6ec Addition of splsoftvm and a VM SWI to handle bus dma related callbacks.
This SWI may be useful for other, defered, VM tasks.
1998-01-15 07:34:01 +00:00
Justin T. Gibbs
e1a1bba4fa Implementation of Bus Space for FreeBSD-x86.
Obtained From: NetBSD
1998-01-15 07:32:56 +00:00
Justin T. Gibbs
57d7d7b3be Implementation of Bus DMA for FreeBSD-x86. This is sufficient to do
page level bounce buffering, but there are still some issues left to
address.
1998-01-15 07:32:21 +00:00
John Dyson
43bdc1e901 Adjust upwards the size of exec map in order to take into account the
additional PAGE_SIZE needed for exec operatino.
1998-01-12 05:16:03 +00:00
Jordan K. Hubbard
efae35abc0 Add ppp, at long last, back to GENERIC. We have enough room in the
kernel for it and I'm tired of reading the "This system lacks kernel
support for PPP..." line in people's tech support messages.
1998-01-11 02:16:38 +00:00
John Birrell
a1db8c36a5 Add a machine dependent header for the i386 jmp_buf size instead of piling
machine dependent definitions into src/include/setjmp.h.
1998-01-10 23:04:51 +00:00
Eivind Eklund
e4f4247a08 Make the BOOTP family new-style options (in opt_bootp.h) 1998-01-09 03:21:07 +00:00
David E. O'Brien
aa5ce62c01 AMD calls the PR166 and PR200, models 2 and 3 respectively. 1998-01-03 05:43:37 +00:00
David E. O'Brien
7a124dd5b4 Update AMD URL for CPU recognition docs. 1998-01-03 05:36:40 +00:00
KATO Takenori
1ba2a54313 Fix typo. Option `CPU_SUSP_HLT' didn't work on Cyrix 486DX box.
Submitted by:	nyan@wyvern.cc.kogakuin.ac.jp (Takahashi Yoshihiro)
1998-01-03 05:35:51 +00:00
Mike Smith
d20358b3bd Don't try to call into BIOS32 handlers outside the normal ROM
address range.  They may have been trashed earlier in the boot
process, or the directory header may simply be bogus.

PR:		5140
Submitted by:	Joel Faedi <Joel.Faedi@esial.u-nancy.fr>
Brought-to-attention-by: Derek Inksetter <derek@saidev.com>, bde
1998-01-01 13:26:55 +00:00
Bruce Evans
82d86d3750 Moved the SMP declarations of INTREN() and INTRDIS() to the correct header,
i.e., the same header as corresponding non-SMP #defines.
1998-01-01 08:47:17 +00:00
Poul-Henning Kamp
0f12aa9ffd More cleanup relating to our use of the TSC.
Look in the cpu_feature (CPUID output) to see if we have it.
1997-12-28 17:33:10 +00:00
Poul-Henning Kamp
d46e059f94 wash, sort and put in order various nits from the i586_ctr -> tsc
commit.

Pointed out by: bde
1997-12-28 13:36:09 +00:00
Peter Wemm
388610239f Back out previous commit, the so-called "unused code" was most definately
used, and caused a reference to an uninitialised variable (state).
I think I've fixed it now, but since nothing in the tree seems to use it,
I'm not sure.
1997-12-27 03:00:59 +00:00
Peter Wemm
19d768b80b #include "opt_user_ldt.h" so that the #ifdef USER_LDT checks can work, as
commented about at length in the PR audit trail.

PR: 2412
1997-12-27 02:28:28 +00:00
Poul-Henning Kamp
71f461f86a Rename "i586_ctr" to "tsc" (both upper and lower case instances).
Fix a couple of printfs too.

Warning: This changes the names of a couple of kernel options!
1997-12-26 20:42:37 +00:00
John Dyson
841fc3681b Correct my previous fix for the UPAGES problem. 1997-12-22 10:06:09 +00:00
John Dyson
adbf9b6f86 Hopefully fix the problem with the TLB not being updated correctly.
Problem tracked down by bde@freebsd.org, but this is an attempted
efficient fix.
1997-12-22 00:36:48 +00:00
Stefan Eßer
8277ac255e Make the class code checks in function pci_cfgcheck less strict.
It failed to recognize the PCI bus in a system that had only an
old chip-set (class code 000000) and a Cyclom multiport serial
card on PCI bus 0, but no VGA card or disk or network controller.

PR:		i386/5300
Submitted by:	Nickolay N. Dudorov <nnd@itfs.nsk.su>
1997-12-20 09:04:25 +00:00
Tor Egge
5c623cb649 Add support for low resolution SMP kernel profiling.
- A nonprofiling version of s_lock (called s_lock_np) is used
    by mcount.

  - When profiling is active, more registers are clobbered in
    seemingly simple assembly routines. This means that some
    callers needed to save/restore extra registers.

  - The stack pointer must have space for a 'fake' return address
    in idle, to avoid stack underflow.
1997-12-15 02:18:35 +00:00
Tor Egge
549a42942d Don't forward hardclock or statclock to stopped cpus. Disable forwarding
when a panic has occured.
1997-12-15 01:14:10 +00:00
John Dyson
8256655132 After one of my analysis passes to evaluate methods for SMP TLB mgmt, I
noticed some major enhancements available for UP situations.  The number
of UP TLB flushes is decreased much more than significantly with these
changes.  Since a TLB flush appears to cost minimally approx 80 cycles,
this is a "nice" enhancement, equiv to eliminating between 40 and 160
instructions per TLB flush.

Changes include making sure that kernel threads all use the same PTD,
and eliminate unneeded PTD switches at context switch time.
1997-12-14 02:11:23 +00:00
Tor Egge
80db913bd6 Add needed #include.
Problem found by: Bruce Evans <bde@zeta.org.au>
1997-12-12 21:45:23 +00:00
Steve Passe
eae8fc2c8a The improvements to clock statistics by Tor Egge
Wrappered and enabled by the define BETTER_CLOCK (on by default in smpyests.h)

Reviewed by:	smp@csn.net
Submitted by:	Tor Egge <Tor.Egge@idi.ntnu.no>
1997-12-08 23:00:24 +00:00
Steve Passe
baf41202ca The improvements to clock statistics by Tor Egge
Wrappered and enabled by the define BETTER_CLOCK (on by default in smpyests.h)

apic_vector.s also contains a small change I (smp) made to eliminate
the double level INT problem.  It seems stable, but I haven't the tools
in place to prove it fixes the problem.

Reviewed by:	smp@csn.net
Submitted by:	Tor Egge <Tor.Egge@idi.ntnu.no>
1997-12-08 22:59:39 +00:00
Sean Eric Fagan
2a024a2b05 Changes to allow event-based process monitoring and control. 1997-12-06 04:11:14 +00:00
John-Mark Gurney
4d9deedb49 document and make the NO_F00F_HACK a proper option...
also, sort some option includes while I'm here..

Forgotten by:	sef
1997-12-04 21:21:26 +00:00
Jordan K. Hubbard
e41b6f2db7 After consultation with David, change
#ifndef NO_F00F_HACK
to
#if defined(I586_CPU) && !defined(NO_F00F_HACK)
1997-12-04 14:35:40 +00:00
Sean Eric Fagan
34883582bc Make has_f00f_bug extern, and get rid of some unused code in the f00f
code.

Submitted by:	Mikael Karpberg & Cy Schubert
1997-12-03 16:27:33 +00:00
Sean Eric Fagan
c4fbf2774d Work around for the Intel Pentium F00F bug; this is Intel's recommended
workaround.  Note that this currently eats up two pages extra in the system;
this could be alleviated by aligning idt correctly, and then only dealing with
that (as opposed to the current method of allocated two pages and copying the
IDT table to that, and then setting that to be the IDT table).
1997-12-03 02:45:50 +00:00
John-Mark Gurney
857c08d17c fix a few style nites...
make isa_dmacascade, isa_dmastart, isa_dmadone, and find_isadev MUCH
easier to be found by starting them at the beginging of the line...

remove braces inside of ifdef RESOURCE_CHECK... found by % in vi...
1997-11-30 09:44:28 +00:00
Joerg Wunsch
81df9bbcd5 Removed an unused line of code, that caused an ``maybe used uninitialized''
warning.

Found by:	Simon Shapiro
1997-11-26 22:45:47 +00:00
Bruce Evans
17788a0aef Fixed multiple definitions of boothowto. 1997-11-24 18:35:11 +00:00
Bruce Evans
043e37feab Added a sysctl (machdep.cputime_clock) to select the clock used by
"high resolution" profiling.  The available clocks are:
- the i8254 clock
- on non-SMP i586's and i686's: the TSC
- on systems with I586_PMC_GUPROF configured, and PERFMON configured
  and available: all the performance counters.
This is unfinshed (there are problems with locking out the PERFMON
device driver, and with losing calibration after switching the clock),
but better than static configuration or writing to kmem.

Changed ifdefs to avoid generating code for non-working option
combinations.
1997-11-24 18:16:23 +00:00
Bruce Evans
21e5241572 Fixed some #include messes.
Hid the check of the user %cs in syscall() under `#ifdef DIAGNOSTIC'.
1997-11-24 13:25:37 +00:00
Jonathan Lemon
b20f1ceeee Correct CPU_CYRIX_NO_LOCK fix.
PR:		5121
Pointed out by:	Matthew Hunt
1997-11-21 22:33:52 +00:00
Bruce Evans
b361bff536 Fixed setting of `safepri'. It should be SWI_AST_MASK most of the
time, but was left at 0.  This caused the "can't happen" case in
splz_swi to happen for panics when tsleep() calls splx(safepri)
and there is a SWI_AST pending.  This was harmless because the
the error handling happens to be right.  Debugging this was tricky
because debugger traps force SWI_AST_MASK on in `cpl'.
1997-11-21 18:27:15 +00:00
Bruce Evans
cc8ae84672 Moved splhigh()/spl0() calls from isa_configure() to configure() so that
there is a natural place to initialize `safepri' in a future commit.
Spinoffs:
- spl0() gets called in the unlikely event that isa is not configured.
- configure() has better control over enabling interrupts.
- it is now less unclear that interrupts aren't actually enabled early.
  Rev.1.48 of autoconf.c seems to have done the opposite of what was
  intended - moving the isa_configure() call delayed the spl0() side
  effect.
Added some comments about the bogons.  Removed the splhigh() call since
it is a no-op.
1997-11-21 18:14:02 +00:00
Peter Wemm
617d73c29d Previous commit refers to SWAP_PART, which is only defined if the include
file that it's in is #included...
1997-11-21 05:44:07 +00:00
Bruce Evans
d447dbee36 Removed a duplicate (sloppy common-style) definition.
Fixed some style bugs.
1997-11-20 19:41:20 +00:00
Bruce Evans
96a73b4063 Moved some extern declarations to header files (unused ones to /dev/null). 1997-11-20 19:30:35 +00:00
Bruce Evans
b7a2b1ff66 Avoid passing some more `retval's. 1997-11-20 18:43:55 +00:00
Bruce Evans
eb0fb17ea5 Fixed wrong limits for the kernel text in db_numargs(). The
interval [VM_MIN_KERNEL_ADDRESS, etext] was used instead of
[btext, etext).  Added a comment about this being completely
wrong for LKMs.  This only affects interpreting the instructions
after the return to attempt decide the number of args.  The
attempt usually fails anyway.
1997-11-20 18:24:52 +00:00
Bruce Evans
af2f22807f Fixed write enabling of the kernel text section. The overlap
checking was mostly wrong at the boundaries.  For the lower limit,
VM_MIN_KERNEL_ADDRESS was used instead of btext and there was an
off-by-(`size' - 1) error.  For the upper limit, &etext was used
instead of etext and there was an off-by-1 error.  The bugs were
harmless because `size' is not too large and some memory is mapped
just beyond the ends.  We still depend on the former to avoid
having to handle the case where the memory range covers the whole
text section, and on the latter to prevent problems when we map
just beyond an end to allow writing an address range that overlaps
the end.

Fixed placement of a nearby comment.
1997-11-20 18:09:36 +00:00
Bruce Evans
e6af3c69e8 Don't allow setting the dump device to any partition except the
one traditionally reserved for swap devices.  The restrictions
should now be the same as the ones for dumpsys().  The restriction
on the partition should be removed someday, and dumpsys() shouldn't
repeat all the checks.
1997-11-20 17:07:21 +00:00
Bruce Evans
e0605ebd12 Removed an unused #included.
Ifdefed #includes that are not used in the SMP case.
1997-11-18 11:32:31 +00:00
Bruce Evans
41d022ae9c Removed #unused includes.
Added a used #include (don't depend on yet to be fixed namespace pollution).
1997-11-18 11:16:56 +00:00
Bruce Evans
8fa40736f6 Don't #include <machine/smp.h> even in the SMP case. Fixed the one
place that depended on it.  The "bazillion warnings" mentioned in the
log for rev.1.45 apparently aren't a problem any more.  It is hard
to be sure because the SIMPLELOCK_DEBUG option turns off (and breaks)
things in the SMP case.
1997-11-18 09:27:23 +00:00
Tor Egge
31e5225482 Use UPAGES when setting up private pages for SMP (which includes idle stack). 1997-11-07 19:58:34 +00:00
Poul-Henning Kamp
0abc78a697 Rename some local variables to avoid shadowing other local variables.
Found by: -Wshadow
1997-11-07 09:21:01 +00:00
Poul-Henning Kamp
4a11ca4e29 Remove a bunch of variables which were unused both in GENERIC and LINT.
Found by:	-Wunused
1997-11-07 08:53:44 +00:00
Poul-Henning Kamp
cb226aaa62 Move the "retval" (3rd) parameter from all syscall functions and put
it in struct proc instead.

This fixes a boatload of compiler warning, and removes a lot of cruft
from the sources.

I have not removed the /*ARGSUSED*/, they will require some looking at.

libkvm, ps and other userland struct proc frobbing programs will need
recompiled.
1997-11-06 19:29:57 +00:00
KATO Takenori
39f451d763 Identify MediaGX CPU correctly. Old MeidaGX CPU and GXm CPU are
distinguished.  CPU-classes of MeidaGX CPU and GXm CPU are 486-class
and 586-class, respectively.

PR:		4936
1997-11-06 03:10:28 +00:00
KATO Takenori
f9c1acbf97 Fix rare 6x86 CPU whose DIR0 = 0x20 - 0x28 case. 1997-11-05 15:12:44 +00:00
KATO Takenori
788217f130 Use same address for USERCONFIG_BOOT on PC-98 as IBM-PC.
Submitted by:	H. Nokubi <h-nokubi@nmit.tmg.nec.co.jp>
Forgotten by:	kato
1997-11-04 03:19:25 +00:00
Justin M. Seger
c198e6ecd9 Change comments about ijppp to iijppp.
PR:		conf/4905
Submitted by:	takas-su@is.aist-nara.ac.jp
1997-10-31 22:10:09 +00:00
Bruce Evans
55b211e3af Removed unused #includes. 1997-10-28 15:59:26 +00:00
Bruce Evans
7f47cf2f4a Don't include <machine/cputypes.h> or declare cputype/class interfaces
in <machine/cpu.h>.  Moved the declarations to <machine/cputypes.h>.
Fixed style bugs in the moved code.  Fixed everything that depended on
the nested include.  Don't include <machine/cpu.h> (in the changed files)
unless something in it is used directly.
1997-10-28 11:43:57 +00:00
Joerg Wunsch
1160da921f Remove the stale `log' non-pseudodevice.
Found by:	the new config(8) ;-)
1997-10-28 07:24:35 +00:00
Bruce Evans
4090154b9e Moved declaration of etext from <machine/md_var.h> to <machine/cpu.h>
and fixed everything that dependended on it being declared in the old
place.  It is used in "machine-independent" code in subr_prof.c.

Moved declaration of btext from subr_prof.c to <machine/cpu.h>.  It
is machine-dependent.
1997-10-27 17:23:18 +00:00
Bruce Evans
b3c0d23251 Oops, <machine/psl.h> is used unconditionally in -current. 1997-10-27 17:19:20 +00:00
Bruce Evans
ba21341dfd Cleaned up #includes.
Ifdefed conditionally used includes.

Finished changing indentation of per-statement comments to 40.
1997-10-27 16:35:34 +00:00
Jordan K. Hubbard
7416845fdd Bump MAXDSIZ to 512MB so that soft limits have a chance to actually
regulate this.
Reviewed by:	dyson
1997-10-27 00:38:46 +00:00
John Dyson
d80130d389 Check to see if the pv_limits are initialized before checking. 1997-10-27 00:34:15 +00:00
John Dyson
fe3e6985a7 Change the initial amount of memory allocated for pv_entries to be proportional
to the amount of system memory.  Also, clean-up some of the new pv_entry
mgmt code.
1997-10-26 12:33:39 +00:00
Nate Williams
e7e437dbfa - Do a bunch of gratuitous changes intended to make the code easier to
follow.
 * Rename/reorder all of the pccard structures, change many of the member
   names to be descriptive, and follow more closely other 'bus' drivers
   naming schemes.
 * Rename a bunch of parameter and local variable names to be more
   consistant in the code.
 * Renamed the PCCARD 'crd' device to be the 'card' device
 * KNF and make the code consistant where it was obvious.
 * ifdef'd out some unused code
1997-10-26 04:36:24 +00:00
John Dyson
0c8029e9f0 Somehow an error crept in during the previous commit. 1997-10-25 04:49:01 +00:00
John Dyson
5985940e79 Support garbage collecting the pmap pv entries. The management doesn't
happen until the system would have nearly failed anyway, so no signficant
overhead is added.  This helps large systems with lots of processes.
1997-10-25 02:41:56 +00:00
John Dyson
0a80f406b3 Decrease the initial allocation for the zone allocations. 1997-10-24 23:41:04 +00:00
Mike Smith
9deacac371 Reference the DMI table inside the SMBIOS table correctly, not using a variable
that won't be initialised until a later test.
Submitted by:	bde via -Wunused
1997-10-21 07:40:22 +00:00
Joerg Wunsch
d37346eefb Make all the documented (in pcvt(4)) options supported options. While
i was at it, do no longer insist on `PCVT_FREEBSD' being declared in
the config file, but default it to a reasonable value.

More cleanup to follow, but this part is safe for RELENG_2_2, too.
1997-10-18 10:59:47 +00:00
Poul-Henning Kamp
a1c995b626 Last major round (Unless Bruce thinks of somthing :-) of malloc changes.
Distribute all but the most fundamental malloc types.  This time I also
remembered the trick to making things static:  Put "static" in front of
them.

A couple of finer points by:	bde
1997-10-12 20:26:33 +00:00
Peter Wemm
0c111a5c17 Try and fix some style problems 1997-10-12 15:24:39 +00:00
Jordan K. Hubbard
02630e3d73 Allow "foo0: disabled, not probed" message to stay, but make it conditional
on bootverbose so that those who _really wanna know_ still can.
Compromise suggested by:	joerg
1997-10-12 08:31:41 +00:00
Poul-Henning Kamp
55166637cd Distribute and statizice a lot of the malloc M_* types.
Substantial input from:	bde
1997-10-11 18:31:40 +00:00
Peter Wemm
b67dffdad2 Compensate for pcb.h tweaks.
(Bruce pointed out the nesting)
1997-10-10 12:42:54 +00:00
Peter Wemm
b54470b433 Don't #include unneeded includes here. pcb_ext.h picks up lots of other
stuff with it.
1997-10-10 12:40:09 +00:00
Peter Wemm
3acc17d787 GPROC0_SEL isn't used in any *.s files it seems.. 1997-10-10 12:38:27 +00:00
Peter Wemm
98823b2366 Convert the VM86 option from a global option to an option only depended
on by the files that use it.  Changing the VM86 option now only causes
a recompile of a dozen files or so rather than the entire kernel.
1997-10-10 09:44:12 +00:00
Nate Williams
9e5fbad43e - Enable PS/2 mouse support by default. Given that almost all new hardware
has a PS/2 port, this is a good thing.  Note, older 386/486 boxes may
  lockup the keyboard controller with this enabled, but most of these kinds
  of machines don't run -current, so the benefits outweigh the downsides.

Discussed with:		Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
1997-10-08 17:05:03 +00:00
KATO Takenori
6593be6011 Added two Cyrix 6x86/6x86MX options.
- CPU_CYRIX_NO_LOCK enables weak locking.  If this option is not set and
  FAILESAFE is defined, NO_LOCK bit of CCR1 is cleared.
- CPU_WT_ALLOC enables write-through allocation.
1997-10-06 08:08:41 +00:00
John Dyson
42c0de4926 It is possible that MB's with really broken bios's not set up more of
the mtrr registers.  This just fills in more of the registers.
1997-10-06 02:11:32 +00:00
John Dyson
c63ba9f5ae Make sure that the memory type registers are the same for each CPU
in a P6 SMP system.  Some MB bios'es don't set the registers up correctly
for the AP's.  Additionally, set the memory between 0xa0000 and 0xbffff
as write combining.
1997-10-05 03:19:29 +00:00
KATO Takenori
dd15a0d07f Call identifycyrix() when 6x86MX CPU is found. The identifycyrix()
function sets cyrix_did.  Old code could not display correct variable.

Reviewed by:	Hideyuki Suzuki <hideyuki@sat.t.u-tokyo.ac.jp>
1997-10-03 14:23:47 +00:00
Justin T. Gibbs
643b3d0cf2 Fix a serious bug I introduced while adding in support for CAM interrupts.
It seems I didn't count my 0's properly when adding the new masks into
icu_vector.s pushing SWI_AST_MASK off the end of the array and screwing
up the indexing for SWI_CLOCK_MASK.

Fix the bug icu_vector.s and also reformat the code in both icu_vector.s and
apic_vector.s so that it will be much harder to make the same mistake in
the future.

Submitted by:	Bruce Evans <bde@zeta.org.au>
1997-09-28 19:30:01 +00:00
Stephen McKay
a2575e01e8 Add a small hack to support the strange antics of the Unisys ELI 4003. This
machine generates an NMI for each floating point error, just like an old XT.
Since it is ISA only, reading the EISA status port yields 0xff, which would
give a spurious EISA panic.  The simplest thing to do is to ignore the 0xff.
1997-09-28 15:48:34 +00:00
David Greenman
fcc58b9423 Fix a bug where the speculative memory probe wouldn't occur on systems that
report slightly more than 64MB of total memory. This can happen due to the
total being the sum of both base and extended memory.
Submitted by:	Alan Cox <alc@cs.rice.edu>
1997-09-25 15:49:37 +00:00
Poul-Henning Kamp
76cf257b66 Look for another couple of magic bios things.. 1997-09-24 07:47:43 +00:00
Bruce Evans
10c57556bc Moved setconf() call after root configuration again. This fixes a
null pointer panic in the "generic" version of setconf().

Removed the resulting near-duplicate printf.
1997-09-23 17:14:37 +00:00
Peter Wemm
ca6e514c81 Turn on CR4_VME on the AP's the same as the BSP. Note that we do not
[yet] probe the AP's for their cpuid/capabilities etc, so this is a fudge
at best.

Problem noted by: Jonathan Lemon <jlemon@americantv.com>
1997-09-22 05:03:03 +00:00
Justin T. Gibbs
cec9e91f19 Oops. This file shouldn't have been committed. 1997-09-22 00:37:08 +00:00
Justin T. Gibbs
02a199102d aha1542.c aic6360.c cy.c fd.c ft.c
if_ie.c if_wl.c if_zp.c isa.c isa_device.h
labpc.c mcd.c ncr5380.c scd.c seagate.c si.c
sio.c tw.c ultra14f.c wcd.c wd.c:

	Update for changes in the callout interface.

apic_vector.s icu_vector.s ipl.s ipl_funcs.c:

	Add CAM software/hardware interrupt support.
1997-09-21 21:41:49 +00:00
Justin T. Gibbs
919429034e autoconf.c:
Add cpu_rootconf and cpu_dumpconf so that configuring these
	two devices can be better controlled by the MI configuration
	code.

machdep.c:
	MD initialization code for the new callout interface.

trap.c:
	Add support for printing out whether cam interrupts are masked
	during a panic.
1997-09-21 21:38:05 +00:00
Justin T. Gibbs
168bbc9927 Move the rules for aicasm to the MI conf file. 1997-09-21 21:34:31 +00:00
Peter Wemm
dfd5aef3a8 Implement the parts needed for VM86 under SMP. 1997-09-21 15:03:59 +00:00
John Dyson
a65247e12c Add support for more than 1 page of idle process stack on SMP systems. 1997-09-21 05:50:02 +00:00
Poul-Henning Kamp
6ab4db67c0 For AMD chips, pick up the long description from the chip if
possible. (This is not really a typographical improvement in the
case of the K6 it seems, but AMD appearantly want it too look
that way).  Also if bootverbose, dump some more info about the
chip.
1997-09-20 13:18:48 +00:00
John-Mark Gurney
77509afdf3 teach pnp to keep isa_device structs around, and teach isa.c how to scan
these structs for conflics...

it still exist that two PnP cards can colide, but this is up to the user
to make sure it doesn't happen...

other modifications to pnp.c to format output properly, and hide more
output behind bootverbose flag...

fix some bugons in pnp.h that would of made it difficult for inclusion
in external programs (for import of pnpinfo)
1997-09-19 15:20:25 +00:00
Joerg Wunsch
755b925e24 Addf flags 0x10 to the sio0 line, so it is available as a potential
console.  This features backwards-compatibility to the era when sio(4)
was always available for a console.
1997-09-14 18:57:01 +00:00
Peter Wemm
35b8b2ddab Update select -> poll in drivers. 1997-09-14 03:19:42 +00:00
Joerg Wunsch
cae6f73ac2 Revert the logic behind my last change, and use a function called
`is_physical_memory()' now for the decision whether to dump some
region of memory or not.

Suggested by:	davidg
1997-09-13 16:12:15 +00:00
Joerg Wunsch
e0b78e19f2 Do not ever try to coredump adapter memory regions.
PR:		4486
Submitted by:	tegge@idi.ntnu.no (Tor Egge)

Implement a function is_adapter_memory() in order to determine what
should nto be dumped at all.  Currently, only populated with the ``ISA
memory hole''.  Adapter regions of other busses should be added.
1997-09-10 12:31:40 +00:00
John-Mark Gurney
7806e33667 add neccessary calls to autoconf for pnp,
also teach userconfig about the new pnp commands, for usage see pnp(4)
1997-09-09 12:48:59 +00:00
Peter Wemm
421f9ee1ef Change an assemble-time divide into a shift. Under binutils-2.8 gas in elf
mode, the slash is a comment leader, while under non-elf it is a divide
symbol (what a concept! :-).  Theoretically, #APP/#NO_APP can change this
but that doesn't seem to mesh too well with macros and line continuation.
1997-09-08 06:40:58 +00:00
Steve Passe
20233f27f4 General cleanup of the lock pushdown code. They are grouped and enabled
from machine/smptests.h:

#define PUSHDOWN_LEVEL_1
#define PUSHDOWN_LEVEL_2
#define PUSHDOWN_LEVEL_3
#define PUSHDOWN_LEVEL_4_NOT
1997-09-07 22:04:09 +00:00
John Dyson
5b05023a50 Fix an intermittent problem during SMP code operation. Not all of the
idle page table directories for all of the processors was being updated
during kernel grow operations.  The problem appears to be gone now.
1997-09-07 01:15:13 +00:00
Peter Wemm
bb36094c06 Argh, what was I thinking?? Don't (yet) halt the CPU in the idle loop
while waiting for an interrupt (rather than spinning on the runqueue status
bits), since the other cpu can put stuff in there and the sleeping cpu may
not get an interrupt for a while.  When we have a reschedule IPI, this can
come back.

Pointed out by: fsmp
1997-09-05 17:54:07 +00:00
Peter Wemm
279a69322c Cosmetic adjustment for the trap/double fault/panic cpu id listing.
It now prints the apic id in hex rather than decimal.
1997-09-05 08:54:55 +00:00
David Greenman
86fe35b5c6 Cosmetic change to last commit: speculative_mtest -> speculative_mprobe. 1997-09-04 15:23:33 +00:00
David Greenman
e91dd67ed8 Changed the memory sizing code so that if the following conditions
are met:

1) The BIOS indicates that there is exactly 64MB of RAM, and
2) The memory size isn't specified with the MAXMEM option or
   the npx0 msize hack,

   ...then do a speculative memory probe beyond the 64MB's until the
first bad page is encountered. This is an admitted hack, but should
nonetheless deal with detecting the correct amount of memory in nearly
all of the modern systems with >64MB of RAM.
Also made a change that will cause the list of detected memory chunks
to be printed if bootverbose is set.
1997-09-04 15:14:48 +00:00
Bruce Evans
e4ba6a82b0 Removed unused #includes. 1997-09-02 20:06:59 +00:00
Steve Passe
010e669615 Removed the "globl" nature of the vec array. This was left over from the
time when icu.s was common between UP and SMP.  It is not necessary for UP
and thus can be removed from icu_ipl.s.
1997-09-02 19:40:13 +00:00
Steve Passe
1de995bb1f General cleanup of the sub-system locking macros.
Eliminated the RECURSIVE_MPINTRLOCK.
clock.c and microtime use clock_lock.
sio.c and cy.c use com_lock.

Suggestions by:	Bruce Evans <bde@zeta.org.au>
1997-09-01 07:45:37 +00:00
Steve Passe
7245dff0f1 Cleanup. 1997-09-01 07:31:54 +00:00
Bruce Evans
e28b96049b Move closer to supporting VM86 under SMP.
LINT now compiles but doesn't link.  Other link-time breakage for LINT
is now visible (SMP is incompatible with SIMPLELOCK_DEBUG).
Submitted by:	jlemon
1997-09-01 01:54:52 +00:00
Bruce Evans
6856ba1262 Removed unused #includes. 1997-09-01 01:12:53 +00:00
Bruce Evans
6d58e6cbc4 Fixed options SHOW_BUSYBUFS and PANIC_REBOOT_WAIT_TIME which were broken
by incomplete cutting and pasting from machdep.c to kern_shutdown.c.

PR:		3953
1997-08-31 23:08:38 +00:00
Steve Passe
2645264a72 Debug version of simple_lock. This will store the CPU id of the
holding CPU along with the lock.  When a CPU fails to get the lock
it compares its own id to the holder id.  If they are the same it
panic()s, as simple locks are binary, and this would cause a deadlock.

Controlled by smptests.h: SL_DEBUG, ON by default.

Some minor cleanup.
1997-08-31 03:17:48 +00:00
Peter Wemm
bf9380893a Define some machine characteristics using symbol naming on conventions
in place in the other BSD's.
1997-08-30 18:59:48 +00:00
Steve Passe
78292efeef Another round of lock pushdown.
Add a simplelock to deal with disable_intr()/enable_intr() as used in UP kernel.
UP kernel expects that this is enough to guarantee exclusive access to
regions of code bracketed by these 2 functions.
Add a simplelock to bracket clock accesses in clock.c: clock_lock.

Help from:	Bruce Evans <bde@zeta.org.au>
1997-08-30 08:08:10 +00:00
KATO Takenori
662f9a6987 Move MACHINE_ARCH definition from <machine/param.h> to <machine/cpu.h>.
Submitted by:	Bruce Evans <bde@zeta.org.au>
1997-08-30 02:52:04 +00:00
Steve Passe
34162fc615 Support for the new FAST_HI algorithm, enabled.
Preliminary support for the INTR_SIMPLELOCK algorithm, disabled.
Note that this code is NOT ready.
1997-08-29 18:45:23 +00:00
Steve Passe
5f642c1666 Support for the new FAST_HI algorithm.
Improved interrupt handling, fewer silo overflows.

With help from:	dave adkins <adkin003@gold.tc.umn.edu>
1997-08-29 18:16:18 +00:00
Jonathan Lemon
5f07393373 Remove the vm86 support as an LKM, and link it directly into the kernel
if 'options "VM86"' is in the config file.  The LKM was really for
development, and has probably outlived its usefulness.
1997-08-28 14:36:56 +00:00
Mike Smith
67fb1e6a0c Here is a patch to alleviate the current problem with the dma interface
and the sound driver which uses auto dma.

The  dma interface functionality remains however it now checks
to see if a dma is operating in auto dma mode and if so it bypasses
the busy flag check . I have modified the sound driver 3.5  to
adjust for this new behavior and tested it under FreeBSD 3.0 -current

This patch also includes the new function isa_dmastop.

Submitted by:	Amancio Hasty <hasty@rah.star-gate.com>
1997-08-28 03:36:40 +00:00
Peter Wemm
90bcb528a8 Correct some things I forgot about until it was too late with smp_active.
smp_active = 1 used to indicate that the system had frozen previously
started AP's, while smp_active = 0 was "AP's not yet started".  I have split
this into smp_started (which is set when the AP's come online), and
smp_active is left for turning on/off AP scheduling.
1997-08-26 18:36:15 +00:00
Peter Wemm
9a3b3e8bce Clean up the SMP AP bootstrap and eliminate the wretched idle procs.
- We now have enough per-cpu idle context, the real idle loop has been
revived (cpu's halt now with nothing to do).
- Some preliminary support for running some operations outside the
global lock (eg: zeroing "free but not yet zeroed pages") is present
but appears to cause problems.  Off by default.
- the smp_active sysctl now behaves differently. It's merely a 'true/false'
option.  Setting smp_active to zero causes the AP's to halt in the idle
loop and stop scheduling processes.
- bootstrap is a lot safer.  Instead of sharing a statically compiled in
stack a number of times (which has caused lots of problems) and then
abandoning it, we use the idle context to boot the AP's directly.  This
should help >2 cpu support since the bootlock stuff was in doubt.
- print physical apic id in traps.. helps identify private pages getting
out of sync.  (You don't want to know how much hair I tore out with this!)

More cleanup to follow, this is more of a checkpoint than a
'finished' thing.
1997-08-26 18:10:38 +00:00