included twice as a side effect of including unrelated headers, but I
removed the #include of one of the headers and will soon fix the nested
#include in the other.
the file so that this compiles without forward declarations of that
data. (It is impossible to forward-declare static data in Gnu C.
Declaring it as static is correct, but causes bogus warnings from
gcc -Wredundant-decls. Declaring it as extern works, but causes
correct warnings from gcc -pedantic and is undefined in ANSI C.
We usually declare it as extern. Here it was once really extern,
but botched staticization left it as static here and apparently-
extern in a header file.)
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another system, such as NetBSD, CVS: then name the system in this
line, otherwise delete it. CVS: Reviewed by: CVS: Before
committing changes please have someone check your work and CVS:
include their name here. If the change is trivial and you have not
else; i.e., CVS: they sent us a patch or a new module, then
include their name/email CVS: address here. If this is your work
then delete this line. CVS:
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Moved description of sio 16650A flag to the sio section and rewrote the
description. It was in the generic console flags section.
Added undocumented options CPU_UPGRADE_HW_CACHE and WLDEBUG.
This define enables the code to ALWAYS run the 8254 timer thru the 8259 ICU.
It is ON by default.
It depricates the usage of "options SMP_TIMER_NC" in the config file.
1) Make sure that the region mapped by a 4MB page is
properly aligned.
2) Don't turn on the PG_G flag in locore for SMP. I plan
to do that later in startup anyway.
3) Make sure the 2nd processor has PSE enabled, so that 4MB
pages don't hose it.
We don't use PG_G yet on SMP -- there is work to be done to make that
work correctly. It isn't that important anyway...
of the kernel, and also most of the dynamic parts of the kernel. Additionally,
4MB pages will be allocated for display buffers as appropriate (only.)
The 4MB support for SMP isn't complete, but doesn't interfere with operation
either.
1. Add new interface, add_scrn_saver()/remove_scrn_saver(), to declare
loading/unloading of a screen saver. The screen saver calls these
functions to notify syscons of loading/unloading events.
It was possible to load multiple savers each of which will try to
remember the previous saver in a local variable (`old_saver'). The
scheme breaks easily if the user load two savers and unload them in a
wrong order; if the first saver is unloaded first, `old_saver' in the
second saver points to nowhere.
Now only one screen saver is allowed in memory at a time.
Soeren will be looking into this issue again later. syscons is
becoming too heavy. It's time to cut things down, rather than adding
more...
2. Make scrn_timer() to be the primary caller of the screen saver
(*current_saver)(). scintr(), scioctl() and ansi_put() update
`scrn_time_stamp' to indicate that they want to stop the screen saver.
There are three exceptions, however.
One is remove_scrn_saver() which need to stop the current screen saver
if it is running. To guard against scrn_timer() calling the saver during
this operation, `current_saver' is set to `none_saver' early.
The others are sccngetc() and sccncheckc(); they will unblank the
screen too. When the kernel enters DDB (via the hot key or a
break point), the screen saver will be stopped by sccngetc().
However, we have a reentrancy problem here. If the system has been in
the middle of the screen saver...
(The screen saver reentrancy problem has always been with sccnputc()
and sccngetc() in the -current source. So, the new code is doing no
worse, I reckon.)
3. Use `mono_time' rather than `time'.
4. Make set_border() work for EGA and CGA in addition to VGA. Do
nothing for MDA.
Changes to the LKM screen saver modules will follow shortly. YOU NEED
TO RECOMPILE BOTH SCREEN SAVERS AND KERNEL AS OF THESE CHANGES.
Reviewed by: sos and bde
to this when raised, and most were in favor of at least this option
(some also asked for semaphores and messages, but I'll leave that argument
for another time :).
and released. It should use `spcl' consistently in both cases,
otherwise shift/control/alt state may not be correctly set/reset.
(Even with this fix, you can still make syscons confused and fail to
change internal state if you really want to, by installing a really
arcane and artificial keymap.)
PR: i386/4030
Reviewed by: sos
