When memory is not zero'ed by firmware, uninitialized PCB can have bogus
contents, which appear as a saved onfault condition, Altivec context to
restore etc. and lead to corruption/crashes. This commit fixes such issues.
Submitted by: Michal Mazur arg ! semihalf dot com
Tested by: Andreas Tobler andreast-list ! fgznet dot ch
controller in the VIA southbridge functional in the CDS
(Configurable Development System) for MPC85XX.
The embedded USB controllers look operational but the
interrupt steering is still wrong.
Include opt_ddb.h for that. Now you can actually boot with
-d and set breakpoints using function names.
o Make sure to include opt_msgbuf.h.
o Carve out the first 1MB of physical memory. The MPC85xx has
DMA problems with addresses below 1MB. Ideally busdma knows
how to avoid allocating below 1MB for MPC85xx, but that
requires a bit more work. For now, ignore the 1MB of DRAM.
a fair number of static data structures, making this an unlikely
option to try to change without also changing source code. [1]
Change default cache line size on ia64, sparc64, and sun4v to 128
bytes, as this was what rtld-elf was already using on those
platforms. [2]
Suggested by: bde [1], jhb [2]
MFC after: 2 weeks
CACHE_LINE_SIZE constant. These constants are intended to
over-estimate the cache line size, and be used at compile-time
when a run-time tuning alternative isn't appropriate or
available.
Defaults for all architectures are 64 bytes, except powerpc
where it is 128 bytes (used on G5 systems).
MFC after: 2 weeks
Discussed on: arch@
replace magic numbers with constants to keep this from happening again.
Without this fix, some programs would occasionally get SIGTRAP instead
of SIGILL on an illegal instruction. This affected Altivec detection
in pixman, and possibly other software.
Reported by: Andreas Tobler
MFC after: 1 week
CPUs known to use 128 byte cache lines and defaulting to 32, use the dcbz
instruction to measure it. Also make dcbz behave the way you would
expect on PPC 970.
but do not actually invoke KDB. This includes recoverable machine checks
encountered in kernel mode.
This patch causes machines with Grackle host-PCI bridges to be able to
correctly enumerate them again.
MFC after: 3 days
1) Move the new field (brand_note) to the end of the Brandinfo structure.
2) Add a new flag BI_BRAND_NOTE that indicates that the brand_note pointer
is valid.
3) Use the brand_note field if the flag BI_BRAND_NOTE is set and as old
modules won't have the flag set, so the new field brand_note would be
ignored.
Suggested by: jhb
Reviewed by: jhb
Approved by: kib (mentor)
MFC after: 6 days
being switched out may hold a reservation. The stwcx. will
clear the reservation. This is architecturally recommended.
The scenario this addresses is as follows:
1. Thread 1 performs a lwarx and as such holds a reservation.
2. Thread 1 gets switched out (before doing the matching
stwcx.) and thread 2 is switched in.
3. Thread 2 performs a stwcx. to the same reservation granule.
This will succeed because the processor has the reservation
even though thread 2 didn't do the lwarx.
Note that on some processors the address given the stwcx. is
not checked. On these processors the mere condition of having
a reservation would cause the stwcx. to succeed, irrespective
of whether the addresses are the same. The dummy stwcx. is
especially important for those processors.
on a generic dumper that creates an ELF core file and
uses PMAP functions to scan and iterate over memory
chunks, as well as handle memory mappings used during
dumping.
the PMAP layer can choose to return physical memory
chunks or virtual memory chunks. For minidumps, the
chunks should be virtual.
The default MMU I/F implementation for the scan_md()
method returns NULL. Thus, when a PMAP implementation
does not implement the required methods, an empty
core file is created. Here, empty means having an ELF
header only.
Obtained from: Juniper Networks
provided, for example, on the PowerPC 970 (G5), as well as on related CPUs
like the POWER3 and POWER4.
This also adds support for various built-in hardware found on Apple G5
hardware (e.g. the IBM CPC925 northbridge).
Reviewed by: grehan
driver in Linux 2.6. uscanner was just a simple wrapper around a fifo and
contained no logic, the default interface is now libusb (supported by sane).
Reviewed by: HPS
to the full path of the image that is being executed.
Increase AT_COUNT.
Remove no longer true comment about types used in Linux ELF binaries,
listed types contain FreeBSD-specific entries.
Reviewed by: kan
".note.ABI-tag" section.
The search order of a brand is changed, now first of all the
".note.ABI-tag" is looked through.
Move code which fetch osreldate for ELF binary to check_note() handler.
PR: 118473
Approved by: kib (mentor)
the unmanaged flag set in the PVO attributes. Without doing this,
pmap_remove() could try to remove fictitious pages (like those created
by mmap of physical memory) from the wrong UMA zone, causing a panic.
Reported by: Justin Hibbits
MFC after: 1 week
When copying big structures, LLVM generates calls to memmove(), because
it may not be able to figure out whether structures overlap. This caused
linker errors to occur. memmove() is now implemented using bcopy().
Ideally it would be the other way around, but that can be solved in the
future. On ARM we don't do add anything, because it already has
memmove().
Discussed on: arch@
Reviewed by: rdivacky
Previously, DBCR0 flags were set "globally", but this leads to problems
because Book-E fine grained debug settings work only in conjuction with the
debug master enable bit in MSR: in scenarios when the DBCR0 was set with
intention to debug one process, but another one with MSR[DE] set got
scheduled, the latter would immediately cause debug exceptions to occur upon
execution of its own code instructions (and not the one intended for
debugging).
To avoid such problems and properly handle debugging context, DBCR0 state
should be managed individually per process.
Submitted by: Grzegorz Bernacki gjb ! semihalf dot com
Reviewed by: marcel
- interrupt coalescing
- polling
- jumbo frames
- multicast
- VLAN tagging
The enhanced version of the chip (eTSEC) can also take advantage of:
- TCP/IP checksum calculation h/w offloading
Obtained from: Freescale, Semihalf
the PIC before the interrupt handler was set. If the interrupt triggered in
that window, then the interrupt vector would be disabled.
Reported by: Marco Trillo
power and thermal control, as well as GPIOs on Xserves and controlling
sound codecs for Apple built-in audio.
Submitted by: Marco Trillo
Obtained from: NetBSD
