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	sommerfeld_i386mp_1:1.1.0.2;
locks; strict;
comment	@# @;


1.1
date	2001.01.09.01.31.58;	author sommerfeld;	state dead;
branches
	1.1.2.1;
next	;

1.1.2.1
date	2001.01.09.01.31.58;	author sommerfeld;	state Exp;
branches;
next	1.1.2.2;

1.1.2.2
date	2001.01.09.01.36.06;	author sommerfeld;	state Exp;
branches;
next	1.1.2.3;

1.1.2.3
date	2001.01.09.03.34.01;	author sommerfeld;	state Exp;
branches;
next	1.1.2.4;

1.1.2.4
date	2001.01.10.04.38.31;	author sommerfeld;	state Exp;
branches;
next	1.1.2.5;

1.1.2.5
date	2001.04.21.19.03.20;	author thorpej;	state Exp;
branches;
next	1.1.2.6;

1.1.2.6
date	2001.05.27.00.16.14;	author sommerfeld;	state Exp;
branches;
next	1.1.2.7;

1.1.2.7
date	2001.07.02.13.39.10;	author fvdl;	state Exp;
branches;
next	1.1.2.8;

1.1.2.8
date	2002.01.30.14.55.05;	author sommerfeld;	state Exp;
branches;
next	1.1.2.9;

1.1.2.9
date	2002.05.19.01.02.01;	author sommerfeld;	state Exp;
branches;
next	;


desc
@@


1.1
log
@file MP-TODO was initially added on branch sommerfeld_i386mp_1.
@
text
@@


1.1.2.1
log
@current worklist, from memory.
@
text
@a0 28
TODO list for MP branch (incomplete):

showstoppers for merge back to -current:

 - rewrite interrupt dispatch so that multi-level shared interrupts
are no longer broken.

 - Figure out why things are broken on !MULTIPROCESSOR

 - Sort out cpu feature probes [runs on new cpu], identify_cpu() [runs
on BSP] and cpu initialization [runs on new cpu]; finish banishing
most global variables containing cpu configuration information.

 - careful code review of all diffs from -current

"would be nice":

 - try out mpbios+ioapic w/o MULTIPROCESSOR

 - implement MI softint API

 - figure out why cpu time accounting screws up bigtime:

> ld -Ttext c0100000 -e start -X -o netbsd ${SYSTEM_OBJ} vers.o
> text    data    bss     dec     hex     filename
> 3839853 369428  322400  4531681 4525e1  netbsd
> -1787494046.7u 681459032.2s 7:26.71 2421928.1% 0+0k 17+11379io 99pf+0w

@


1.1.2.2
log
@One more
@
text
@a13 2
 - figure out why ahc on serverworks fails to find its interrupt.

@


1.1.2.3
log
@Non-MULTIPROCESSOR kernel now boots multiuser.
Add a few items.
@
text
@d6 1
a6 1
   are no longer broken.
d8 5
a12 6
 - Sort out:
	- cpu feature probes [runs on new cpu]
	- identify_cpu() output [runs on BSP] 
	- cpu initialization [runs on new cpu];
   finish banishing most global variables containing cpu configuration 
   information to struct cpu_info
a17 2
 - test and fix npx on i386 (npx exceptions through ISA interrupts).

a19 2
 - stop all cpu's on shutdown.

a30 9
-----

DONE:

 - Figure out why things are broken on !MULTIPROCESSOR
[2001/01/08  22:29:56  sommerfeld]
fixed three bugs; !MP kernel now comes up multiuser.

	
@


1.1.2.4
log
@Significant rewrite of slave CPU attach and initialization, centering
on identifycpu() and spreading outward.

Separate feature probes (cpuid invocation), which runs on the cpu
being attached, from the display of this information, which runs on
the boot cpu; remove some of the probe code from locore as it doesn't
need to run that early.

We now spin up secondary cpu's during cpu_attach, have them do a cpu
feature probe, and then have them spin waiting for a "go" signal.

We no longer pay attention to the cpu signature and cpuid features
reported by the MP BIOS since those are known to be truncated for at
least some bioses.

We now do npx initialization (including FDIV bug detection) on all
cpus.

XXX Change some of the cyrix bug workarounds to fit the new
identifycpu() system; this is untested.
@
text
@d8 7
a22 8
 - use atomic ops to modify ci_flags and cpu_feature to avoid losing bits.

 - verify that cyrix 486 isn't blown out of the water by machdep changes.

 - verify that cyrix clock chip bug fix isn't broken.

 - make sure BSP always attaches first!

d44 1
a44 8
 - Sort out:
	- cpu feature probes [runs on new cpu]
	- identify_cpu() output [runs on BSP] 
	- cpu initialization [runs on new cpu];
   finish banishing most global variables containing cpu configuration 
   information to struct cpu_info
[2001/01/09  22:27:38  sommerfeld]
completed.  significant rewrite of cpu spinup required.
@


1.1.2.5
log
@MI softintr API is now a show-stopper for -current; the trunk
now has it, and the performance of the USB code relies on it.
@
text
@a7 2
 - implement MI softint API

d27 2
@


1.1.2.6
log
@Check off a few things, add a few more.
@
text
@a4 14
 - change splraise/spllower to not touch local apic, since that's very
slow (requires cheap per-cpu storage).

 - per-cpu GDT and MP-safing of gdt.c.  this seems like severe
overkill so just one descriptor is different.  While we're in there,
we *might* want to use per-cpu, more ephemeral, descriptors for TSS
and LDT.

 - quad cpu ppro sporadically jumps into the stack; need to diagnose
this.

 - implement per cpu ring buffer with trap logs (including the "last
branch from/to" MSR contents) to allow for sane debugging.

d8 2
d26 2
d30 6
a35 2
 - turn off rdtsc-based microtime on uniprocessor systems which might
have variable-speed TSC.
a52 17

 - stop all cpu's on shutdown.

 - implement MI softint API

 - implement MP-safe microtime

 - figure out why cpu time accounting screws up bigtime:

> ld -Ttext c0100000 -e start -X -o netbsd ${SYSTEM_OBJ} vers.o
> text    data    bss     dec     hex     filename
> 3839853 369428  322400  4531681 4525e1  netbsd
> -1787494046.7u 681459032.2s 7:26.71 2421928.1% 0+0k 17+11379io 99pf+0w

[2001/05/26  20:03:41  sommerfeld]
answer: microtime was just doing the wrong thing.  fixed.

@


1.1.2.7
log
@Delete one item: npx at isa using irq 13 works on a plain i386.
@
text
@d26 2
@


1.1.2.8
log
@update
@
text
@d8 5
a25 4
 - try to render APM *harmless* (and functional in uniprocessor
configurations).  it can't possibly work correctly when multiple cpu's
are running, but..

a40 6
 - investigate using per-cpu, more ephemeral, descriptors for TSS and
LDT.

 - make halt -p work in MULTIPROCESSOR config (the one APM feature
everyone wants)

a72 6

[2002/01/30  09:52:17  sommerfeld]
done a while ago:

 - per-cpu GDT and MP-safing of gdt.c.  this seems like severe
overkill so just one descriptor is different.  
@


1.1.2.9
log
@oh, hey, i've done some of this stuff.
@
text
@d8 6
d17 2
d21 3
a23 1
 - make sure APM isn't rendered non-functional on uniprocessors 
d43 3
a84 20
[2002/05/18  20:57:28  sommerfeld]

 - figure out why ahc on serverworks fails to find its interrupt.

answer: pci interrupt routing needs to be done using unswizzled pins,
not just unswizzled devices.

also done recently:

 - quad cpu ppro sporadically jumps into the stack; need to diagnose
this.

 - implement per cpu ring buffer with trap logs (including the "last
branch from/to" MSR contents) to allow for sane debugging.

 - make halt -p work in MULTIPROCESSOR config (the one APM feature
everyone wants)

 - try to render APM *harmless* in MP configs.  it can't possibly work
correctly when multiple cpu's are running, but..
@