This fixes a critical bug where a clock interrupt would happen sometime
between the call to hp300_calibrate_delay() and when proc0 is initialized.
This ends up dereferencing a bad pointer in itimerdecr(), which scribbles
over the first page of kernel text, specifically vectors 46 and 47 (decimal).
To complicate matters, the way the bug manifested itself was different
depending on whether or not DDB was configured into the kernel. When
DDB is in the kernel, kernel text is mapped read/write. When DDB is not
in the kernel, kernel text is mapped read-only. Note that the kernel
scribble happens early, typically before the console is initialized.
In the non-DDB case, the kernel will hang as soon as it's loaded because
the access causes a fault (before the console is initialized, so you
don't see the trap).
In the DDB case, the access does _not_ cause a fault. However, the
mechanism used to enter the kernel debugger is to issue a "trap #15".
Conveniently, this is one of the corrupted vectors (47), thus rendering
DDB useless (it actually caused a recursive panic/trap loop).
This _WILL_ be in the first 1.2 official patch.
include files containing model-specific I/O device configuration.
Add more options and devices (ccd, LKM, etc), as appropriate for
documentation and as examples in a "template" GENERIC config file,
even though not all of these work completely yet.
and shell script support to be optional (conditioned on EXEC_SCRIPT).
Remove the implicit inclusion of EXEC_ECOFF when COMPAT_OSF1 and/or
COMPAT_ULTRIX is included, and of EXEC_ELF32 when COMPAT_LINUX and/or
COMPAT_SVR4 is included.
queue.h list/queue head initializer macros. mountlist was converted so
that panics (or other reboots) early on in kernel startup don't cause
sys_sync() to croak. vnode_free_list was converted because it was nearby.
- This driver supports the on-board mbus-based cgfourteen (sometimes referred
to as "SX") video hardware present on SS20-class machines.
- It does *not* support any of the SX acceleration features.
- It does support the 8-bit mode of the hardware, and looks to X like
a cgthree.
- It does support the cg6-style hardware cursor, even when running X in
cgthree emulation.
- It does support DPMS power-down of compatible displays on later-revision
cg14's.
- There is code to support the true color (32-bit) mode of the cg14 as
cg8 emulation, but it is disabled by default because it is most likely
broken. #define CG14_CG8 to turn it on.
The driver is not yet installed in the conf files, but I will do so
shortly...
Check only the IR bit of the CIAA Interrupt Control Register when testing
for a level 6 interrupt. An interrupt only occurs if IR is set, and IR is
only set if the individual mask bits are set. The individual interrupt
status bits can be set without causing an interrupt if the corresponding
enable bits are not set.
from arch/mips/mips/locore.S to arch/pmax/pmax/locore_machdep.S.
* Move ARC-specific locore code (vmstat -i counters) to
arch/pica/pica/locore_machdep.S.
* When the mips3 locore support is known to work, both ports can now use
arch/mips/mips/locore.S.
wrappers for:
gets.c getenv.c strcat.c strcpy.c
so they compile again (if _KERNEL is defined).
For bootblock space reasons it would be prereable to call the PROM entrypoints
directly, via the macro wappers in de_prom.h, rather than C function wrappers.
* Create arch/mips/Makefile.inc with source list of generic MIPS-cpu
files for tags
* Use mips/Makefile.inc and updated tag list in pmax/Makefile
* Try building bootblocks in arch/pmax/stand.
clock_attach() time (for now).
This removes our dependance on the DraCo ROM access timing and frees
the second CIA on Amigas.
b) support for DraCo rev. >= 4 native timer chips.
* When we are transferring in DATA (in asc_dma_in) and the target
is an async device, there is sometimes an extra byte in the FIFO.
If so, we need to drain that byte out of the fifo, but if and only
if the target is async. See also the comments in asc_dma_in()
in the related Mach mk84 asc driver (scsi_53C94_hdw.c), which
has an identical fix but applied in more restrictive conditions
than we need, with async *disk* targets, as well as async tapes.
* Add a watchdog and timeout active SCSI requests, to eliminate any
potential for deadlock due to applying the fix above on newer
silicon versions of the 53c94 which may not have the above problem.
Should use the MI scsi per-target timeout instead, when available.
for a level 6 interrupt. An interrupt only occurs if IR is set, and IR is
only set if the individual mask bits are set. The individual interrupt
status bits can be set without causing an interrupt if the corresponding
enable bits are not set.
NOTE: THESE FILES ARE NOW IDENTICAL TO THEIR ALPHA COUNTERPARTS.
The C preprocessor does the Right Thing when these files are built
on a SPARC. This makes it significantly easier to diff the two
versions (until a real MI 53c9x driver is done, hint hint).
* Handle message retransmissions and partially sent messages correctly.
* Make sure we clear ATN after the last message is sent.
* Do the right thing if the target initiates negotiation for async mode
after having negotiated sync mode.
* Fix some cases where we set ATN with no message queued, or schedule a
message without setting ATN.
* Issue a REQUEST SENSE after an unexpected disconnect, per SCSI spec.
* Fix abort handling in a number of cases.
* Recognize selection timeouts better (to speed up probing).
ELF-outputting version of the assembler. (It was dying when it saw
some CPP line number markers.) This is temporary. (Workaround suggested
by Matt Thomas.)
would generate two interrupts, one real and one spurious. The solution
is to force a drain of the SBus->MBus write buffers after writing to the
lance to clear the interrupt. Thanks to Chris Torek for pointing out a much
easier way to do this than I had planned...
these are hacks (s/long/int/, etc.), but this code really needs a heavy
cleaning (including fixed-size typing) and I don't have time to give it one
now.
consistency with the way machdep headers for other things are done.
(the creation of the ecoff_machdep.h files was done on the CVS server, to
keep the RCS logs intact.)
macros to use to remove #ifdefs from the machine ID case check.
Eventually, these headers will contain other information, e.g.
machine-dependent relocation information, etc.
use the pre-autoconfig cold serial-console inititialization entry
points from the bus-specific cfattach front-end code.
* Delete post-autoconfig code to switch from PROM output to kernel
driver for machines with dc serial chips.
cfattach code for TC SCSI option cards and ioasic 53c94 baseboard SCSI.
ascvar.h: shared softc declarations
asc_ioasic.c: ioasic front-end code.
asc_tc.c: Turbochannel option (and 5000/200 basebard) front-end code.
* ioasic_attach meeds more work to eliminate pmax_type dependency
and to verify the clocks speed passed to 53c94.
* Add prototypes for asc script entry points; should compile with
-Wstrict-prototypes -Wmissing-prototypes.
* Use tcvar.h interface. The usage of tc_syncbus() and tc_mb() may
not be quite stylistically on an Alhpa, but it apparently makes no
difference on the eerly-generation Alpha CPUs in TC Alphas.
cfattach front-end code:
dc_ds for the decstation 2100( pmin), 3100 (pmax), and 5100.
dc_ioasic for the decstation 5000/200 (3max) which does not have a
DEC TC-style IOCTL asic, but is configured as if it did.
* Add pre-autoconfig code initialization of kerenl dc driver console I/O
for remote serial consoles. The hack to use PROM serial I/O until the
dc device is autoconfigured is no longer necessary.
* Add MIPS make variable pointing at $S/arch/mips
* Build locore from $MIPS/mips locore source
* Build locore.o and fp.o (fp emulation) from arch/mips locore source
* Add target and rules to build pmax-specific locore code locore_machdep.o
from $PMAX/pmax/lcore_machdep.S
>* Use `-S' rather than `-x' to remove debugging symbols.
because the pmax toolchain and gcc disagree about what is a "local"
symbol, and ld requires a "-x" to let elf2aout build bootable a.out kernels.
to call mcount(). This is needed because the ``link a6,#0'' insn used
trips up gcc's ANSI preprocessor (A # in a function-type macro must be
followed by a macro argument). _PROF_PROLOG is also used in the i386
asm.h.
Solaris' asm_linkage.h has a MCOUNT macro similar to _PROF_PROLOG
except it expands to different code sequences based on whether a
function is being compiled with "prof" or "gprof" instrumentation.
I also discovered that the m68k ALTENTRY is very different than the
implementation used by other NetBSD ports. Usually ALTENTRY simply
provides an alternate function entry point. The m68k version takes a
second argument and jumps inside the second function when profiling is
enabled. The m68k behavior is similar to the ENTRY2 macro found in
solaris.
Providing ENTRY2 and changing all the code that uses ALTENTRY to use
it would be a desirable change.
(1) the if_prom code needs to be cleaned up quite a bit
(right now it hard-codes client's ethernet address), and
(2) much of this code (esp: getsecs.c, netboot.c, newvers.sh,
rpcc.S) should be shared with other Alpha boot blocks,
and dev_net.[ch] should maybe go in libsa proper.
in the branch-emulation code was uninitialized, due to a misplaced #endif.
Remove the relevant #ifdef (macro version of GetBranchDest), and move the
XXX note about r4000 branch targets to the function definition.
pathological behaviour (freezes) when running short of free pages. see
PR#2755 for a more detailed explanation (from jonathan).
thanks to john dyson for the first cut of this change.
boot block, since it will be shared with the network boot block.
(2) Kill a.out support, since it never worked was never used, and will
never be.
(3) Add support for booting of ELF kernels, from Matt Thomas. (Currently
untested, but it compiles.)
