is already in use and just return NULL instead.
Such situation could happen with devices which have
unconfigured PCI interrupt pins (because firmware
doesn't configure multiple function devices) and
each driver could handle the return value properly.
- Reduce available SPL levels for hardware devices to none, vm, sched, high.
- Acquire kernel_lock only for interrupts at IPL_VM.
- Implement threaded soft interrupts.
SEMMNI, SEMMNS, SEMUME and SHMMAXPGS.
They can be tweaked via sysctl now. Ports that were setting values on
them weren't touched, I only removed the ones that were commented out.
to avoid possible race condition between CPU writeback vs DMA write
- remove unnecessary FS and LS bits from RxD->xd0
(sys/dev/ic/tulipvar.h sets them but maybe they are ignored?)
This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.
TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.
NOTES:
pmppc was removed as an arch, and moved to a evbppc target.
need to understand the locking around that field. Instead of setting
B_ERROR, set b_error instead. b_error is 'owned' by whoever completes
the I/O request.
Fixes silent hangs after loading 4.0_BETA2 GENERIC kernel
on Qube2 (and RaQ2) with 256MB RAM, reported and tested
by James Hartley on port-cobalt.
Obviously this should be pulled up to netbsd-4.
by our native bootloader.
- Restore lwp0.l_cpu (which is required for curcpu()) and
cpu_info_store.ci_curlwp after clearing BSS in case
a kernel is loaded by the firmware directly since these
values are in BSS and initilized before mach_init() is called.
(actually they are restored in mips_machdep.c:mips_vector_init()
but we use curcpu() earlier than that point)
Fixes silent hang right after boot on cobalt.
from doc/BRANCHES:
idle lwp, and some changes depending on it.
1. separate context switching and thread scheduling.
(cf. gmcgarry_ctxsw)
2. implement idle lwp.
3. clean up related MD/MI interfaces.
4. make scheduler(s) modular.
int _bus_dmatag_subregion(bus_dma_tag_t tag,
bus_addr_t min_addr,
bus_addr_t max_addr,
bus_dma_tag_t *newtag,
int flags)
void _bus_dmatag_destroy(bus_dma_tag_t tag)
that allow a (normally broken/limited) device to restrict the bus address
range it can talk to. this is used by bce(4) to limit DMA addresses to
1GB range, the maximum the chip can address.
all this is from Yorick Hardy <yhardy@uj.ac.za> with input from several
people on tech-kern.
XXX: bus_dma(9) needs an update still.
