-optionally, use Martin's direct hardware access to serial lines
-optionally, new console autoselection method: select serial console
if a character is seen within 1 second
-move awaitkey() here, it can be shared by different bootloaders and
it is used by console autoselection
-collect information about console selection in a "bootinfo" defined
structure, for passing to the kernel
separated "nfswrapper.c"/"nfs.c".
This nfs.c differs from the stand/lib/libsa one in that it does not
have a separate mount() function - the mount is done in open().
on EV56 and later processors that have the "amask BWX" bit clear. These
instructions will be used to implement non-swizzle bus access functions
on newer systems, such as the new AlphaStation 500s with EV56 and 21172
PCI chipsets.
See "Alpha Architecture Handbook, Version 3", DEC order number EC-QD2KB-TE.
* support chip clocks != COM_FREQ, by introducing sc_frequency (for the
mainline code) and adding a frequency parameter right after the rate
parameter to comcnattach() and com_kgdb_attach().
- Make com_isa and com_multi initialize sc_frequency to COM_FREQ.
- Make i386/machdep.c and alpha/dec_xxx.c call com*attach() with the freq.
parameter.
* supio_attach_args get two more fields: a sc_ipl and a sc_arg, both ints.
- com_supio uses the first for interupt establishment (all childs will, as
soon as they exist) and the 2nd for sc_frequency.
- drsupio passes sc_ipl alway as 5, and for the "com"s, sc_arg as 16*115200
- hyper will pass sc_ipl as 6, and sc_arg as 16 * 460800
- Fix a few bugs in the software single-stepping support code, where
VMS PALcode ops were being checked, rather than OSF/1 PALcode ops,
causing erroneous results in the "exception return" and "unconditional
branch" predicates.
- Add the BWX instructions ("ldbu", "ldwu", "stb", "stw") to the
"load" and "store" predicates.
easier to add instructions that the disassembler doesn't know about
(the opcode subfunction number is now printed).
- Add the "amask" and "implver" operate subfunctions.
- Add the "ldbu", "ldwu", "stb", and "stw" major opcodes (BWX instructions).
An IMB intruction must be executed after software or I/O devices
write into the instruction stream or modify the instruction
stream virtual address mapping, and before the new value is
fetched as an instruction.
We were missing calls to IMB after mappings were changed, which caused
systems with large I-caches (e.g. my AlphaStation 500) to fail miserably
when mapping in new pages of program text, or when context switching
(I couldn't even get the shell from init!).
reads. This is necessary because of newer AlphaStation firmware doing
the Wrong Thing with target aborts behind PCI-PCI bridges, much like they
do the Wrong Thing with master aborts. Reported by Matthias Drochner.
use the `a_entry' field from the kernel's header as a base.
Pass on a new DDB magic number to the kernel, so kernels linked for a
different KERNBASE value can apply a correction when booted from old
bootblocks.
prevents booting DDB kernels that are built with a different value of KERNBASE.
Apply a correction based on the magic number passed in by the bootblocks.
New bootblocks without the hard-coded KERNBASE reference will be assigned
a new magic number.
reset sequence to complete. Just sending the reset command and rushing
off -- like it used to do -- might cause the keyboard's response to get
lost in case the remaining kernel initialization decides to interact
with the console (RB_ASK!) by calling cngetc(), which goes off polling
within the PROM.
PCI master aborts as eb164 firmware, so use the same workaround mechanism
on all system types (clear error register's master abort bit, and check
it after accessing configuration space), not just eb164's.
This also fixes a bug on eb164's - when making the Alpha port compile
again, I made an error that caused this to not be used on eb164 systems,
either. Thanks to Matt Jacob for pointing out this goof.
setting up and enabling the MMU. This has the effect of ensuring
that any stray interrupts that get posted before the IPL is lowered
will be handled gracefully, i.e. without an access fault or illegal
instruction exception.
$Fssxxxxx 1MB slot space documented in the old Inside Macintosh, or the
$Fs0xxxxx 1MB slot space documented in the new IM and Guide to Macintosh
Family Hardware.
such code for Mach 3's Alpha port. Initially reworked for NetBSD/alpha
by Chris Demetriou, and then heavily hacked on by me. Works, but is still
a little rough around the edges. Known problems:
- Error recovery could be improved a bit.
- Back traces don't work.
- Single-stepping can be flaky, at times. (Alpha doesn't have hardware
support for single-stepping, and I'm not entirely convinced the
MI DDB software-emulated single-stepping logic is 100% correct.)
- Logic for when to drop into DDB needs some improvement.
(II-B) 2-33 of the Alpha AXP Architecture Reference Manual, Second Edition:
* rdps - Read Processor Status, needed by spl* functions.
* cflush - Cache Flush
* rdval - Read System Value
* wripir - Write Interprocessor Interrupt Request
* wrval - Write System Value
cflush, rdval, wripir, and wrval are used in multi-processor environments.
- Only set mac68k_vidphys if we're on a machine that we couldn't get
the Mac OS memory map.
- If we could get the Mac OS memory map, use the framebuffer size found
by get_mapping() rather than the size calculated using the Booter
environment.
don't expect/provide pci_decompose_tag to be a MI, public function. It
wasn't intended to be to begin with, and uses of it (e.g. the one in the
'de' driver) are quite likely to be incorrect.
passing them a proc *, which encapsulates all of the information necessary
to activate an address space.
- Garbage-collect pmap->pm_stchanged; it's not really used for anything.
passing them a proc *, which encapsulates all of the information necessary
to activate an address space.
- Garbage-collect pmap->pm_stchanged; it's not really used for anything.
- Marco-ize the 3 instructions that actually switch to the new process
context.
- Unify (except for the pmap_deactivate() call) the NEW_PMAP and not-NEW_PMAP
versions of cpu_switch(), and clean up some comments.
- Tidy up the not-NEW_PMAP bits of switch_exit().
drochner