Commit Graph

20 Commits

Author SHA1 Message Date
Peter Grehan
1a6f777efe Always isync after a mtmsr. While perhaps not strictly necessary for PSL_EE
bit banging according to the OEA, it's better to be conservative than
having to continually audit uses of this inline.
2004-08-07 00:20:00 +00:00
Peter Grehan
9917bd81ed DDB -> KDB, and rename low-level trap handler to avoid name conflict. 2004-07-12 22:16:04 +00:00
Andrew Gallatin
67e945bab9 Make breakpoint() actually break into ddb.
Reviewed by: grehan
2003-12-09 13:37:31 +00:00
Peter Grehan
9ea031d50b Doh. Forgot to remove _KERNEL version. 2003-02-23 13:47:44 +00:00
Peter Grehan
d273b006c5 Expose powerpc_mb() to user-space. Currently needed for atomic.h users,
this may go away in the future.
2003-02-22 22:58:13 +00:00
Benno Rice
43e87179f8 Add an inline function wrapper for the mfpvf (Move From Processor Version
Register) instruction.
2003-02-05 11:59:27 +00:00
Peter Grehan
50122aa981 Fix clearing of recoverable exception MSR bit when disabling
interrupts

Approved by: benno
2002-09-19 04:45:06 +00:00
Benno Rice
71cf3a3574 Add an inline to call eieio.
("Enforce In-order Execution of I/O".  I am not making this up.)
2002-06-29 10:00:07 +00:00
Benno Rice
b2df36e7d2 Add inlines for mtsrin and mfsrin. 2002-04-16 11:45:09 +00:00
Matthew Dillon
182da8209d Stage-2 commit of the critical*() code. This re-inlines cpu_critical_enter()
and cpu_critical_exit() and moves associated critical prototypes into their
own header file, <arch>/<arch>/critical.h, which is only included by the
three MI source files that need it.

Backout and re-apply improperly comitted syntactical cleanups made to files
that were still under active development.  Backout improperly comitted program
structure changes that moved localized declarations to the top of two
procedures.  Partially re-apply one of the program structure changes to
move 'mask' into an intermediate block rather then in three separate
sub-blocks to make the code more readable.  Re-integrate bug fixes that Jake
made to the sparc64 code.

Note: In general, developers should not gratuitously move declarations out
of sub-blocks.  They are where they are for reasons of structure, grouping,
readability, compiler-localizability, and to avoid developer-introduced bugs
similar to several found in recent years in the VFS and VM code.

Reviewed by:	jake
2002-04-01 23:51:23 +00:00
Matthew Dillon
d74ac6819b Compromise for critical*()/cpu_critical*() recommit. Cleanup the interrupt
disablement assumptions in kern_fork.c by adding another API call,
cpu_critical_fork_exit().  Cleanup the td_savecrit field by moving it
from MI to MD.  Temporarily move cpu_critical*() from <arch>/include/cpufunc.h
to <arch>/<arch>/critical.c (stage-2 will clean this up).

Implement interrupt deferral for i386 that allows interrupts to remain
enabled inside critical sections.  This also fixes an IPI interlock bug,
and requires uses of icu_lock to be enclosed in a true interrupt disablement.

This is the stage-1 commit.  Stage-2 will occur after stage-1 has stabilized,
and will move cpu_critical*() into its own header file(s) + other things.
This commit may break non-i386 architectures in trivial ways.  This should
be temporary.

Reviewed by:	core
Approved by:	core
2002-03-27 05:39:23 +00:00
Benno Rice
6da4e60a23 - Make all inlines for manipulating supervisor-level registers accept/return
register_t values.
- Implement an inline for isync.
2002-03-21 13:07:31 +00:00
Benno Rice
54551c77ee GC some unused, bogus interrupt functions and replace them with proper
implementations of intr_disable and intr_restore.
2002-03-21 12:04:58 +00:00
Benno Rice
3c854532b0 - When enabling/disabling interrupts, set/clear both PSL_EE and PSL_RI, not
just PSL_EE.
- Make cpu_critical_enter/exit independant of save_intr/restore_intr.
2002-02-28 03:07:48 +00:00
Andrew Gallatin
350cb38b1f Simple fixes to get the powerpc kernel compiling again.
Reviewed by:	mp
2002-01-28 14:07:36 +00:00
John Baldwin
7e1f6dfe9d Modify the critical section API as follows:
- The MD functions critical_enter/exit are renamed to start with a cpu_
  prefix.
- MI wrapper functions critical_enter/exit maintain a per-thread nesting
  count and a per-thread critical section saved state set when entering
  a critical section while at nesting level 0 and restored when exiting
  to nesting level 0.  This moves the saved state out of spin mutexes so
  that interlocking spin mutexes works properly.
- Most low-level MD code that used critical_enter/exit now use
  cpu_critical_enter/exit.  MI code such as device drivers and spin
  mutexes use the MI wrappers.  Note that since the MI wrappers store
  the state in the current thread, they do not have any return values or
  arguments.
- mtx_intr_enable() is replaced with a constant CRITICAL_FORK which is
  assigned to curthread->td_savecrit during fork_exit().

Tested on:	i386, alpha
2001-12-18 00:27:18 +00:00
John Baldwin
0bbc882680 Overhaul the per-CPU support a bit:
- The MI portions of struct globaldata have been consolidated into a MI
  struct pcpu.  The MD per-CPU data are specified via a macro defined in
  machine/pcpu.h.  A macro was chosen over a struct mdpcpu so that the
  interface would be cleaner (PCPU_GET(my_md_field) vs.
  PCPU_GET(md.md_my_md_field)).
- All references to globaldata are changed to pcpu instead.  In a UP kernel,
  this data was stored as global variables which is where the original name
  came from.  In an SMP world this data is per-CPU and ideally private to each
  CPU outside of the context of debuggers.  This also included combining
  machine/globaldata.h and machine/globals.h into machine/pcpu.h.
- The pointer to the thread using the FPU on i386 was renamed from
  npxthread to fpcurthread to be identical with other architectures.
- Make the show pcpu ddb command MI with a MD callout to display MD
  fields.
- The globaldata_register() function was renamed to pcpu_init() and now
  init's MI fields of a struct pcpu in addition to registering it with
  the internal array and list.
- A pcpu_destroy() function was added to remove a struct pcpu from the
  internal array and list.

Tested on:	alpha, i386
Reviewed by:	peter, jake
2001-12-11 23:33:44 +00:00
David E. O'Brien
a6b989ffbf Minor style(9)'ing 2001-08-16 10:13:34 +00:00
Benno Rice
abc5579e8c Fix the atomic_*_32 operations. These were written before I had the ability
to test them properly and before I had a working knowledge of GCC asm
constraints.
2001-06-27 12:17:23 +00:00
Benno Rice
d27f1d4c12 This commit (along with one pending in sys/dev/ofw and one in sys/conf) give
us our first minimal glimpse of PowerPC support.

With this code we can get to the "mountroot>" prompt on my Apple iMac.  We
can't get any further due to lack of clock and interrupt handling, among other
things.  This does however mean that pmap and VM are initialising.

We're fairly dependant on OpenFirmware at this point, but I hope to add
support for other classes of firmware at a later stage.

Reviewed by:	obrien, dfr
2001-06-16 07:14:07 +00:00