Commit Graph

983 Commits

Author SHA1 Message Date
John Baldwin
25f3f7c530 Add in a simple API for memory barriers to machine/bus.h:
- barrier_read() enforces a memory read barrier
- barrier_write() enforces a memory write barrier
- barrier_rw() enforces a memory read/write barrier
2000-10-18 10:30:12 +00:00
Paul Saab
c794ceb56a Implement write combining for crashdumps. This is useful when
write caching is disabled on both SCSI and IDE disks where large
memory dumps could take up to an hour to complete.

Taking an i386 scsi based system with 512MB of ram and timing (in
seconds) how long it took to complete a dump, the following results
were obtained:

Before:				After:
	WCE           TIME		WCE           TIME
	------------------		------------------
	1	141.820972		1	 15.600111
	0	797.265072		0	 65.480465

Obtained from:	Yahoo!
Reviewed by:	peter
2000-10-17 10:05:49 +00:00
Doug Rabson
e296c9c9f7 In pmap_remove_pv(), only manipulate the page's list if the pv is
managed.
2000-10-16 17:06:32 +00:00
Doug Rabson
85a25ab3d5 Do a full exception_restore after an execve syscall to ensure that the
new program gets the right values for its arguments etc.
2000-10-16 17:03:51 +00:00
Doug Rabson
4f8d61b521 Clear the register stack frame before using loadrs to invalidate the
stacked registers.
2000-10-16 16:59:32 +00:00
Doug Rabson
48ac0f7c79 Clear ar.pfs for the child process in cpu_fork - switch_trampoline
doesn't want a stack frame.
2000-10-16 16:55:59 +00:00
Doug Rabson
9c4e05709a Track changes to trapframe. 2000-10-16 09:18:05 +00:00
Doug Rabson
7fcf71bc40 * Correct some of my misunderstandings about how best to switch to the
kernel backing store.
* Implement syscalls via break instructions.
* Fix backing store copying in cpu_fork() so that the child gets the right
  register values.

This thing is actually starting to work now. This set of changes takes me
up to the second execve (the one which runs the first shell). Next stop
single-user mode :-).
2000-10-16 08:54:40 +00:00
Doug Rabson
2e8a70354f Use the right mask for extracting sof from cr.ifs. 2000-10-16 08:47:56 +00:00
Doug Rabson
eded8b5cfa Remember to re-initialise cr.itm on clock interrupts so that we get more
than just one tick.
2000-10-16 08:46:57 +00:00
Doug Rabson
ecfff41c65 Merge a fix from the alpha port - put softintr in the right place in the
table.
2000-10-16 08:45:45 +00:00
Doug Rabson
a3f05798c1 Give names to app registers and control registers. Fix a typo handling
mov from branch register instructions.
2000-10-16 08:44:34 +00:00
Poul-Henning Kamp
398bc678aa Move DELAY() from <machine/clock.h> to <sys/systm.h> 2000-10-15 09:51:49 +00:00
Doug Rabson
61e1efff8a Implement a rudimentary interrupt handling system which should be good
enough for clock interrupts in SKI.
2000-10-12 17:47:01 +00:00
Doug Rabson
d84feb93c4 Turn off a debugging printf. 2000-10-12 17:46:12 +00:00
Doug Rabson
5596cfd09a * Fix exception handling so that it actually works. We can now handle
exceptions from both kernel and user mode.
* Fix context switching so that we can switch back to a proc which we
  switched away from (we were saving the state in the wrong place).
* Implement lazy switching of the high-fp state. This needs to be looked
  at again for SMP to cope with the case of a process migrating from one
  processor to another while it has the high-fp state.
* Make setregs() work properly. I still think this should be called
  cpu_exec() or something.
* Various other minor fixes.

With this lot, we can execve() /sbin/init and we get all the way up to its
first syscall. At that point, we stop because syscall handling is not done
yet.
2000-10-12 14:36:39 +00:00
Doug Rabson
8034cac98a Fix this so that it can cope with transfers to/from regions which are not
physically contiguous.
2000-10-12 14:29:24 +00:00
Doug Rabson
c332b0bc57 * Allocate kernel stacks with contigmalloc() to make exception handling
safe - we can't afford to take a TLB trap when we are writing a
  trapframe. Possibly revisit this later.
* Various fixes to pmap_enter() so that it actually works properly.
2000-10-12 14:28:05 +00:00
Doug Rabson
e571ae24fe Some minor fixes and simplifications. 2000-10-12 14:25:09 +00:00
Doug Rabson
ec502c357d * Add rudimentary DDB support (no kgdb, no backtrace, no single step).
* Track recent changes to SWI code.
* Allocate RIDs for pmaps (untested).
* Implement assembler version of cpu_switch - its cleaner that way.
2000-10-10 14:57:10 +00:00
Poul-Henning Kamp
f6b5c74c35 Initiate deorbit burn sequence for <machine/mouse.h>.
Replace all in-tree uses with <sys/mouse.h> which repo-copied a few
moments ago from src/sys/i386/include/mouse.h by peter.
This is also the appropriate fix for exo-tree sources.

Put warnings in <machine/mouse.h> to discourage use.
November 15th 2000 the warnings will be converted to errors.
January 15th 2001 the <machine/mouse.h> files will be removed.
2000-10-09 08:08:36 +00:00
Poul-Henning Kamp
00d25f512c Initiate deorbit burn sequence for <machine/console.h>.
Replace all in-tree uses with necessary subset of <sys/{fb,kb,cons}io.h>.
This is also the appropriate fix for exo-tree sources.

Put warnings in <machine/console.h> to discourage use.
November 15th 2000 the warnings will be converted to errors.
January 15th 2001 the <machine/console.h> files will be removed.
2000-10-08 21:34:00 +00:00
Bosko Milekic
ec222a71d9 Cleanup comment in machine/param.h regarding mbuf-related sizes, and get rid
of MCLOFSET, which does not appear to be used anywhere anymore, and if it is,
it probably shouldn't be.
2000-10-08 03:52:27 +00:00
Bruce Evans
cc46dff67f Work around a bug by adding struct tags. gcc-2.95 apparently gets the
check in the [basic.link] section of the C++ standard wrong.  gcc-2.7.2.3
apparently doesn't do the check, so the bug doesn't affect RELENG_3.

PR:		16170, 21427
Submitted by:	Max Khon <fjoe@lark.websci.ru> (i386 version)
Discussed with:	jdp
2000-10-06 11:53:32 +00:00
Jason Evans
5704011c0d Reduce userland namespace polution.
#include <proc.h>, since curproc is needed.
2000-10-06 08:11:11 +00:00
Doug Rabson
8d9761debf Next round of fixes to the ia64 code. This includes simulated clock and
disk drivers along with a load of fixes to context switching, fork
handling and a load of other stuff I can't remember now. This takes us as
far as start_init() before it dies. I guess now I will have to finish off
the VM system and syscall handling :-).
2000-10-04 17:53:03 +00:00
Doug Rabson
431f3cb41d Next round of ia64 work, including fixes to context switching,
implementing cpu_fork(), copy*str(), bcopy(), copy{in,out}(). With these
changes, my test kernel reaches the mountroot prompt.
2000-09-30 17:48:44 +00:00
Doug Rabson
8fb26af111 Ansify and fix warnings. 2000-09-29 16:53:39 +00:00
Doug Rabson
254d92cca6 Implement dirty and access bit exceptions. 2000-09-29 16:52:50 +00:00
Doug Rabson
3e90246a82 Bodge the simplelocks in a way which works UP. 2000-09-29 16:51:33 +00:00
Doug Rabson
b7da7f63eb Use write-back instead of write-combining for region 7. 2000-09-29 15:41:43 +00:00
Doug Rabson
75f10fcd78 Add a few more files for the ia64 port. 2000-09-29 13:48:14 +00:00
Doug Rabson
1ebcad5720 This is the first snapshot of the FreeBSD/ia64 kernel. This kernel will
not work on any real hardware (or fully work on any simulator). Much more
needs to happen before this is actually functional but its nice to see
the FreeBSD copyright message appear in the ia64 simulator.
2000-09-29 13:46:07 +00:00