asm statements, obsoluting asm routines in locore.S. They are
designed to work in symmetry as names suggests. savefpregs()
does not clear a global variable fpcurproc. Both would be noops when
NOFPU global symbol is defined.
- MDP_FPUSED flag is not turned on for FPA-less processors like Vr4100
and TX3900 even when processes execute FP insns.
- 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.
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.
- 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.
from Jeff Smith <jeffs@geocast.com>. These are needed to support
-mips2 compilation. With this change, on a QED 5231 we now pass the
paranoia tests, and are successfully using userlands built with -mips2.
use MIPS_TBRPL(). When PTEs are modified, both src and dst TLBs
are invalidated. MIPS3 single TLB entry has paired double PTE
and pagemove() likely walks through multiple pages. The positive
effect of of MachTLBUpdate() or TBRPL() is unclear.
implementation of locore routines between MIPS1 and MIPS3. It's
independent from mips_locore_jumpvec_t which is for cache/TLB
manipulating routines peculiar to processor designs. mips_locore_jumpvec_t
will be replaced with "processor closures" encapsulating implementation
parameters (cpuinfo) and pointers to conventaion routines (cpuops),
eventually.
discard MachTLBUpdate() calls, however, the necessity of TLB entry
modification in such a way is under question because implementation
glitches on ASID management was straightened, those calls can be
sanely removed after all.
contains the values __SIMPLELOCK_LOCKED and __SIMPLELOCK_UNLOCKED, which
replace the old SIMPLELOCK_LOCKED and SIMPLELOCK_UNLOCKED. These files
are also required to supply inline functions __cpu_simple_lock(),
__cpu_simple_lock_try(), and __cpu_simple_unlock() if locking is to be
supported on that platform (i.e. if MULTIPROCESSOR is defined in the
_KERNEL case). Change these functions to take an int * (&alp->lock_data)
rather than the struct simplelock * itself.
These changes make it possible for userland to use the locking primitives
by including <machine/lock.h>.
