(SCB_VECTOIDX(vec) - SCB_IOVECBASE] -> SCB_VECTOIDX(vec - SCB_IOVECBASE))
Sigh. This is all very good work- this new interrupt stuff. Yet like the
last time my good friend Jason 'simplified' things, we lost information.
It used to be you could tell which specific slot an interrupt was frame
based upon the vector. Now you can't because they're allocated dynamically.
Oh well- it's not all that important.
Rather than an "iointr" routine that decomposes a vector into an
IRQ, we maintain a vector table directly, hooking up each "iointr"
routine at the correct vector. This also allows us to hook device
interrupts up to specific vectors (c.f. Jensen).
We can shave even more cycles off, here, and I will, but it requires
some changes to the alpha_shared_intr stuff.
common routine into the individual load routines, since each load
routine needs to muddle with the "internals" of this operation.
Add a `prefetch threshold' member to the bus_dma_tag_t, so that
eventually we can determine whether or not to allocate a spill
page on a per-mapping basis.
only have to sync the I-stream when the mapping is removed or chaged,
and since the I-stream is fetch-only, changing protection bits does
not constitute changing the mapping (the VA->PA translation is still
the same).
the kernel to panic since it is recognised as a TGA and the TGA driver
doesn't [yet] know what to do with it.
This patch fixes that by:
o making tgamatch() try to actually figure out what kind
of TGA card is there, rather than simply relying on the
vendor/product ids.
o creating a tga_cnmatch() so that the console code in
arch/alpha/pci/pci_machdep.c can cause the same to occur.
o breaking up some of tga_getdevconfig() into a few different
functions to re-use code that would have been duplicated.
o changed arch/alpha/pci/pci_machdep.c so that it calls out
to tga_cnmatch() if DEVICE_IS_TGA() matches before it decides
to attach the console as a TGA.
Addresses PR: port-alpha/12923
be locked before it can be marked as `active' on a processor.
- Require that pmaps other than the kernel pmap be locked when they
are passed to pmap_tlb_shootdown(). This, combined with the locking
protocol tweak, allow us to get a consistent view of `activeness' of
a pmap, which means we can optmize away a lot of TLB shootdown traffic
for user pmaps.
- Borrow an idea from the i386mp branch; use the normal SHOOTDOWN IPI
to deal with hitting the entire TLB, and garbage-collect the TBIA
and TBIAP IPIs.
- fpevent_use is incremented the first time a process uses FP
for the first time (note, FPUSED is inherited on fork, but
cleared on exec).
- fpevent_reuse is incremented whenever a process that has previously
used FP has to take a FEN trap in order to be able to use it again.
discover it, but make it block on a semaphore until the MI kernel
says that we can let the secondary processors loose. This allows
us to announce the extensions on the secondary CPUs, and to compute
the intersection of all the extensions across all CPUs, like so:
cpu0 at mainbus0: ID 0 (primary), 21164A-2
cpu0: Architecture extensions: 1<BWX>
cpu1 at mainbus0: ID 1, 21164A-2
cpu1: Architecture extensions: 1<BWX>
to burn 3 insns to swap the arguments. Need to change the interface to
these routines to match memcpy().
G/C bcopy() from here. We'll let it be provided by libkern (which is
what provides memcpy()) until bcopy() is exorcised completely.
and with the comment '4.2BSD TCP/IP bug compat. Not recommended'
Add commented out 'TCP_DEBUG # Record last TCP_NDEBUG packets with SO_DEBUG'
(All hail amiga and atari which make some attempt to automate the
multiplicity of config files...)
option for System V semaphores. It appears that there are no overrides
in the code and each file has the following added.
options SYSVSEM # System V semaphores
+#options SEMMNI=10 # number of semaphore identifiers
+#options SEMMNS=60 # number of semaphores in system
+#options SEMUME=10 # max number of undo entries per process
+#options SEMMNU=30 # number of undo structures in system
options SYSVSHM # System V shared memory
If anyone thinks that this is incorrect for any of these files, please
correct it.
Note - the i386 port was not forgotten. It was done separately.
on all platforms but the i386. On the i386 we look at T_PROTFLT and send
a SIGSEGV instead of SIGBUS. This makes allegro lisp 5.0 and pvs (a proof
verification system) to work.
XXX[1]: We need to go through each architecture and verify that we send
the correct signal on each trap type.
XXX[2]: trap.c on all other architectures but i386 needs to be modified
to s/trapsignal/(*p->p_emul->e_trapsignal)/g
follows BSD/OS practice and ucd-snmp code (FreeBSD does it for specific
interfaces only).
was: if_lastchange get updated on every packet transmission/receipt.
now: if_lastchange get updated when IFF_UP is changed.
them define __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH
in pci_machdep.h and pciide_map_compat_intr() only calls
pciide_machdep_compat_intr_establish() if that preprocessor
define exists.
Ports that don't need to do this no longer need to supply a
dummy function.
porting this code to i386mp branch):
- call microset() early on each cpu so that calls to microtime()
before the first clock interrupt don't return trash. this manifested
itself as garbage runtimes in "ps" for kernel threads.
- avoid races between hardclock updating "time" and microset on a
different cpu reading it by adding a "microset_time" global which is
initialized from "time" on the primary cpu.
- call microset every hz ticks, not every hz+1 (cosmetic)
each vm_page structure. Add a VM_MDPAGE_INIT() macro to init this
data when pages are initialized by UVM. These macros are mandatory,
but ports may #define them to nothing if they are not needed/used.
This deprecates struct pmap_physseg. As a transitional measure,
allow a port to #define PMAP_PHYSSEG so that it can continue to
use it until its pmap is converted to use VM_MDPAGE_MEMBERS.
Use all this stuff to eliminate a lot of extra work in the Alpha
pmap module (it's smaller and faster now). Changes to other pmap
modules will follow.
to <sys/types.h> and <sys/stdint.h>.
* Add a new C99 <stdint.h> header, which provides integer types of
explicit width, related limits and integer constant macros.
* Extend <inttypes.h> to provide <stdint.h> definitions and format
macros for printf() and scanf().
* Add C99 strtoimax() and strtoumax() functions.
* Use the latter within scanf().
* Add C99 %j, %t and %z printf()/scanf() conversions for
intmax_t, pointer-type and size_t arguments.
using the cycle counter. MP-safeness is achieved by giving each
CPU its own PCC frequency variables, and kicking the non-primary
processors via an IPI once per second.
Based on the sample code from David Mills' "A Kernel Model for
Precision Timekeeping".
This is a completely rewritten scsipi_xfer execution engine, and the
associated changes to HBA drivers. Overview of changes & features:
- All xfers are queued in the mid-layer, rather than doing so in an
ad-hoc fashion in individual adapter drivers.
- Adapter/channel resource management in the mid-layer, avoids even trying
to start running an xfer if the adapter/channel doesn't have the resources.
- Better communication between the mid-layer and the adapters.
- Asynchronous event notification mechanism from adapter to mid-layer and
peripherals.
- Better peripheral queue management: freeze/thaw, sorted requeueing during
recovery, etc.
- Clean separation of peripherals, adapters, and adapter channels (no more
scsipi_link).
- Kernel thread for each scsipi_channel makes error recovery much easier
(no more dealing with interrupt context when recovering from an error).
- Mid-layer support for tagged queueing: commands can have the tag type
set explicitly, tag IDs are allocated in the mid-layer (thus eliminating
the need to use buggy tag ID allocation schemes in many adapter drivers).
- support for QUEUE FULL and CHECK CONDITION status in mid-layer; the command
will be requeued, or a REQUEST SENSE will be sent as appropriate.
Just before the merge syssrc has been tagged with thorpej_scsipi_beforemerge
array of those structures at the end of the pmap structure. We compute
the size of the pmap structure based on the maximum CPU ID for a
particular machine. This gives us better cache behavior and better
memory footprint for the ASN info.
- pmap_enter()
- pmap_remove()
- pmap_protect()
- pmap_kenter_pa()
- pmap_kremove()
as described in pmap(9).
These calls are relatively conservative. It may be possible to
optimize these a little more.
so do so. This allows us to call uvm_pageboot_alloc() before
pmap_bootstrap().
Also, the virtual_start variable is unneeded in the Alpha pmap
module, and virtual_end (and the mostly-unused-except-by-bus_dma
variables avail_start and avail_end) can be `computed' at the
same time.
calling pmap_steal_memory() directly. On these platforms, since
uvm_pageboot_alloc() is a wrapper around pmap_steal_memory(), there
is no functional change. This is merely for API consistency.
which have pmap_steal_memory(). This is to reduce the API differences
between pmaps that implement pmap_steal_memory() and pmaps which do
not.
Note that pmap_steal_memory() needs to adjust *vstartp and/or
*vendp only if it used addresses within the range provided to UVM
via the pmap_virtual_space() call. I.e. it is not necessary to do
so in any current pmap_steal_memory() implementation.
call overhead is incurred as we start sprinkling pmap_update() calls
throughout the source tree (no pmaps currently defer operations, but
we are adding the infrastructure to allow them to do so).
SPINLOCK_SPIN_HOOK, so that we actually check for
pending IPIs on the Alpha more than once. Also,
when we call alpha_ipi_process(), make sure to go
to splipi().
to arrive here referencing the kernel_lev1map without having the
RESERVED ASN -- another CPU may have caused pmap_lev1map_destroy()
to be called, and that routine only invalidates the ASN for the
CPU that called it. So, in the MULTIPROCESSOR case, simply assign
the RESERVED ASN if we reference the kernel_lev1map rather than
asserting that we already have the RESERVED ASN. Thanks to Bill
Sommerfeld for helping me track down the problem.
Also add a new IPI that causes a CPU to re-activate its address
space if the pmap it's using changes level 1 maps (this probably
won't happen very often, but it's correct to have it).
This makes Alpha MP kernels boot multiuser. In fact, this commit
is being made from my dual-CPU AlphaServer 1200 running an MP kernel.
that became apparent when UBC was added: store a pointer to
the process itself, not a pointer to ci->ci_curproc.
This gets us back to where we were before UBC went in: MP
kernels get to single-user mode, and can run processes on
both CPUs, but things go south when we try to come into
multi-user mode.
reserving RAM in the bus_mem extent map. Problem pointed
out by Artur Grabowski.
- Work around a slightly annoying bit of behavior exhibited by
the UP1000 firmware. The UP1000 firmware reports the space
consumed by the "ISA hole" in the same MDDT entry as two
chunks of RAM (on either side of the hole) used by the PALcode,
all as one "reserved for PALcode" chunk. We must take this
into account when reserving RAM in the bus_mem extent map.
spawned kthread/process runs at IPL_0 instead of whatever IPL the
parent was running at.
This appears to fix the NTP clock stability problems observed on some
alpha systems; the clock appears stable even when there's heavy
raidframe (i.e., kthread-intensive) I/O under way.
nisimura