Adds (most) support for ARC platform to port-independent mips code.
Some changes (e.g., clean up of overlapping CPU/FPU ids) inspired by
comparison to the OpenBSD 2.1 codebase of Soda's ARC port.
Open issues:
* Still no support for r4600 or mipsIV CPUs with two-way L1 cache.
Code derived from Per Fogelstrom's OpenBSD source doesn't work
on mips3 pmaxes with L2 cache.
* Still some port-specific #ifdefs, for interrupt enable and
pmax L2 cache-size. Needs more thought, but overlaps with
work-in-progress by Tohru and Tsubai on spl()s and related stuff.
initialized yet. Use the base variable, and also use the symbolic symbols
to acdess the registers. Also, the console max_rows is based on the
display height, not the width.
- bump cpu_model[] length as the longest name occupies over 30 characters.
- place machine_arch[] beside machine[] for clearity.
- nuke useless #include directives.
- small scale cleanup in vm_machdep.c
as with user-land programs, include files are installed by each directory
in the tree that has includes to install. (This allows more flexibility
as to what gets installed, makes 'partial installs' easier, and gives us
more options as to which machines' includes get installed at any given
time.) The old SYS_INCLUDES={symlinks,copies} behaviours are _both_
still supported, though at least one bug in the 'symlinks' case is
fixed by this change. Include files can't be build before installation,
so directories that have includes as targets (e.g. dev/pci) have to move
those targets into a different Makefile.
making performance of bus_dma drivers not completely suck on the DECstation.
XXX R4000 case is still abysmal, because some other data structure
modification is required to deal with the virtually-indexed R4000 cache.
controllers (including SCSI id 7 on the 2100/3100).
- On the pmax (2100,3100) set the host SCSI id to 6.
- Move disk and tape config for the second ASC controller from the GENERIC
config file to scsi.pmax so all configurations can use the second
controller.
* ibus (virtual bus for baseboard direct-attach deviecs)
* 5100 support, using ibus
* rename "clock" to mcclock for future support of Qbus machiens
* use sys/dev/dec mcclock_pad32 machinery for pmax mcclock
* reworked TC config code.
Also make TC framebuffer-console search table-driven.
Does not yet include "tcasic" layer; there's no such hardware on DECstations
and nothing for a tcasic layer to do.
into sys/dev/dec and split into a clockfns layer and a "middle" layer
for other DEC systems which use mcclocks with each onchip byte
register padded out to a 32-bit word.
Clone alpha/alpha/mcclock (also duplicated in pmax port) into
sys/dev/dec, and ifdef for default clockrates on pmax and alpha.
Use new machinery on pmax for ibus,ioasic attached mcclocks.
read and write compare register (controls cycle-driven periodic interrupt).
Use cycle counter for microsecond time on mips3, but for now only on
3min motherboards (5000/150). the MAXINE baseboard microsecond
counter is more stable and I don't ave no 5000/260 to test.
XXX clkread() is a mess, it should be rewritten.
XXX should add nanotime() to give inkernel nanosecond resolution,
and then microtime() reworked to use nanotime().
* dec_5100.c: sysconf, interrupt, and motherboard (drain writebuffer)
support for 5100.
* support for hardware kludge in 5100: sii DMA buffer is hardware
padded to alternate 32-bit words, not alternating 16-bit halfwords.
* 5100 has no framebuffer, console is wired to serial port 0.
With ibus support, boots as far as exec'ing init, and hangs.
a HAVE_GCC28 check-variable that can now be used to add other gcc-2.8
flags in cases where they may be useful, or to remove gcc 2.7.2 "bug
workaround" flags.)
dec_3max.c into a shared file. These models have compatible memory
subsystems, the same memory slots, and (apparently) the same error reporting.
Add markers for where MNN probes for configurations with a mixture of
RAM sizes and for Prestoserve NVRAM (in normal RAM slots) should go.
interrupt-callout vector from mips locore dispatch code to port code.
* Move branch-emulation declaration to mips/include/trap.h.
* Garbage-collect pmax/pmax/trap.h.
Not needed now pmax/pmax_trap.c is gone, and after above tidy-up.
thorpej