- Nuke external function reference of savefpregs() which is already defined
in mips/cpu.h.
- Adjust the comment tells "let user processes change CP0 status register
freely might be dangerous."
- MDP_FPUSED flag indicates the process has executed at least one
FP insn during its life time.
- pcb_fpregs storage is guaranteed zero initialzed. If the process is FPA
owner, savefpregs() must be called to synchronize it with FPA contents.
- No necessity to save FPA contents into pcb_fpregs prior to the whole
storage is overwritten by process_write_fpregs().
doing a cpu_set_kpc(), just pass the entry point and argument all
the way down the fork path starting with fork1(). In order to
avoid special-casing the normal fork in every cpu_fork(), MI code
passes down child_return() and the child process pointer explicitly.
This fixes a race condition on multiprocessor systems; a CPU could
grab the newly created processes (which has been placed on a run queue)
before cpu_set_kpc() would be performed.
- Change ktrace interface to pass in the current process, rather than
p->p_tracep, since the various ktr* function need curproc anyway.
- Add curproc as a parameter to mi_switch() since all callers had it
handy anyway.
- Add a second proc argument for inferior() since callers all had
curproc handy.
Also, miscellaneous cleanups in ktrace:
- ktrace now always uses file-based, rather than vnode-based I/O
(simplifies, increases type safety); eliminate KTRFLAG_FD & KTRFAC_FD.
Do non-blocking I/O, and yield a finite number of times when receiving
EWOULDBLOCK before giving up.
- move code duplicated between sys_fktrace and sys_ktrace into ktrace_common.
- simplify interface to ktrwrite()
state into global and per-CPU scheduler state:
- Global state: sched_qs (run queues), sched_whichqs (bitmap
of non-empty run queues), sched_slpque (sleep queues).
NOTE: These may collectively move into a struct schedstate
at some point in the future.
- Per-CPU state, struct schedstate_percpu: spc_runtime
(time process on this CPU started running), spc_flags
(replaces struct proc's p_schedflags), and
spc_curpriority (usrpri of processes on this CPU).
- Every platform must now supply a struct cpu_info and
a curcpu() macro. Simplify existing cpu_info declarations
where appropriate.
- All references to per-CPU scheduler state now made through
curcpu(). NOTE: this will likely be adjusted in the future
after further changes to struct proc are made.
Tested on i386 and Alpha. Changes are mostly mechanical, but apologies
in advance if it doesn't compile on a particular platform.
kernel should only be used for experimentation
comment out some stuff not present or used on my development machine
g/c ef
add (commented out) aha attachment
from db_stack_trace_cmd() to db_stack_trace_print(),
and add an additional argument, a function pointer for an
output routine (i.e. printf() or db_printf()).
Add db_stack_trace_cmd() in db_command.[ch], calling
db_stack_trace_print() with db_printf() as the printer.
Move count==-1 special handling from db_stack_trace_print() [nee
db_stack_trace_cmd()] to db_stack_trace_cmd() [nascent here].
Again, I'm unable to test compilation on all affected platforms,
so advance apologies for potential brokenness.
which indicates that the process is actually running on a
processor. Test against SONPROC as appropriate rather than
combinations of SRUN and curproc. Update all context switch code
to properly set SONPROC when the process becomes the current
process on the CPU.
Lots of the work was done by Adam Ciarcinsky.
Currently, this only supports CyberPPC boards by Phase 5. Blizzard PPC
expected later.
The kernel is useless but for demonstrating that it starts... especially
interupts, and most of MMU support, is not in yet. Builtin console works,
however, and you can look at the kernel startup messages.
pointer indicating how to print the symbol. This allows db_printsym()
to called in places where db_printf() is not an appropriate output
function.
While straightforward, apologies in advance if I've introduced any minor
syntax errors; I was unable to test compilation this on all the affected
platforms.
scsibus0: waiting 2 seconds for devices to settle...
message during boot crashes the system.
This is because ite_filter() is called before init(8) opens the console.
- Add 16 bytes to the stack on entry to _mcount so we don't
overflow it.
- Use inline interrupt {dis,en}abling instead of calling
profiled function in locore.
PCI config space. Since PCI config space is mostly used by PCI bus drivers,
we won't actually map it in. Instead we use MMU bypass ASI accesses to read
and write PCI config space.
- the `alignment' and `boundary' arguments in bus_dmamem_alloc() only
serve as hints on how to break up a DMA transaction into chunks
when necessary; it is not necessary on sparc DVMA hardware.
- exclusively use the VM page size (i.e. PAGE_SIZE et.al.) when computing
resource allocations.
- remember the size of DVMA resource allocations in the private `_ds_sgsize'
field in a dma segment descriptor.
- mark as CPUFLG_CACHE_MANDATORY to avoid cache inconsistencies in
pmap_{zero,copy}_page().
- compute caching alias bits correctly
- add experimental optimisation in ms1_cache_flush().
addresses the problems seen by Jason Thorpe <thorpej@netbsd.org> and
Erik Berls <cyber@netbsd.org> necessitating rev 1.20 of
biosboot/main.c.
Move BOOTSEG from 0x100 to 0x1000.
Move heap from 0x10000 to 0x20000.
XXXXXXXX
This is a Kluge From Hell to allow boot blocks to grow a little larger
without diskbuf[] crossing a 64k boundary.
soren