# Note: Cavium provided a port that has atomics similar to these, but
# that does a syncw; sync; atomic; sync; syncw where we just do the classic
# mips 'atomic' operation (eg ll; frob; sc). It is unclear to me why
# the extra is needed. Since my initial target is one core, I'll defer
# investigation until I bring up multiple cores. syncw is an octeon specific
# instruction.
this is correct. While registers are 64-bit, n32 is a 32-bit ABI and
lives in a 32-bit world (with explicit 64-bit registers, however).
Change an 8, which was 4 + 4 or sizeof(int) + SZREG to be a simple '4
+ SZREG' to reflect the actual offset of the structure in question.
places. Provide n32/n64 register name defintions. This should have
no effect for the O32 builds that everybody else uses, but should help
make N64 builds possible (lots of other changes are needed for that).
Obtained from: NetBSD (for the regdef.h changes)
required by video card drivers. Specifically, this change introduces
vm_cache_mode_t with an appropriate VM_CACHE_DEFAULT definition on all
architectures. In addition, this changes adds a vm_cache_mode_t parameter
to kmem_alloc_contig() and vm_phys_alloc_contig(). These will be the
interfaces for allocating mapped kernel memory and physical memory,
respectively, with non-default cache modes.
In collaboration with: jhb
atomic_fetchadd_32. Without it gcc would use it as input
register for v and sometimes generate following code for
function call like atomic_fetchadd_32(&(fp)->f_count, -1):
801238b4: 2402ffff li v0,-1
801238b8: c2230018 ll v1,24(s1)
801238bc: 00431021 addu v0,v0,v1
801238c0: e2220018 sc v0,24(s1)
801238c4: 1040fffc beqz v0,801238b8 <dupfdopen+0x2e8>
801238c8: 00000000 nop
Which is definitly wrong because if sc fails v0 is set to 0
and previous value of -1 is overriden hence whole operation
turns to bogus
Reimplement "kernel_pmap" in the standard way.
Eliminate unused variables. (These are mostly variables that were
discarded by the machine-independent layer after FreeBSD 4.x.)
Properly handle a vm_page_alloc() failure in pmap_init().
Eliminate dead or legacy (FreeBSD 4.x) code.
Eliminate unnecessary page queues locking.
Eliminate some excess white space.
Correct the synchronization of pmap_page_exists_quick().
Tested by: gonzo
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@
to bus_space structure that defines access methods and hence every bus can
define own accessors. Default space is mips_bus_space_generic. It's a simple
interface to physical memory, values are read with regard to host system
byte order.
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
- Add debug output
- Fix pmap_zero_page and related places: use uncached segments and invalidate
cache after zeroing memory.
- Do not test for modified bit if it's not neccessary
(merged from mips-juniper p4 branch)
- Some #includes reorganization
o Add support for compiling elf64 for this file (the rest of the changes are
coming later)
o Fill in some misssing relocation types. We need to support these in
elf_machdep.c's relocation routines eventually, but that's future work
too.
sys/param.h and move the MI numbers out of here. Also move the MI
defines. Also remove a couple defines not in use (not sure if it is
age, or OpenBSD origins for thse). Note the current values that are
overrides that appear to be odd in some way.
More cleanup could be done here: NBPG appears to be spelled PAGE_SIZE
these days. There's new ways to spell PGOFSET and PGSHIFT too, I
think. These constants duplicate the MI constants and are sprinkled
into the mips code only. Further investigation is needed.
all to date and the latter also is only used in ia64 and powerpc
code which no longer serves a real purpose after bring-up and just
can be removed as well. Note that architectures like sun4u also
provide no means of implementing IPI'ing a CPU itself natively
in the first place.
Suggested by: jhb
Reviewed by: arch, grehan, jhb
Now that st_rdev is being automatically generated by the kernel, there
is no need to define static major/minor numbers for the iodev and
memdev. We still need the minor numbers for the memdev, however, to
distinguish between /dev/mem and /dev/kmem.
Approved by: philip (mentor)
