Commit Graph

100 Commits

Author SHA1 Message Date
Alan Cox
5760d14d58 pmap_enter() *must* set PG_WRITEABLE on the given page if it creates a
mapping that permits write access.  Otherwise, pmap_remove_write() will not
remove write access from any of the page's mappings.
2009-05-23 22:05:14 +00:00
Alan Cox
56c4a67ba7 Give pmap_enter()'s third parameter the same name that it has on amd64 and
i386.  Otherwise, my next to last commit (r192628) to this file doesn't
actually compile.
2009-05-23 18:44:26 +00:00
Alan Cox
b4b264f3e9 When a page is mapped for write access on a read fault, the PTE should be
configured to trap on a write access unless *all* of the page's dirty bits
are set.
2009-05-23 18:33:22 +00:00
Alan Cox
e420c0cab7 Preset the modified bit in the PTE when pmap_enter() is called during a
write fault or while wiring a mapping that must support write access.

In general, this change should reduce the number of traps that occur for
the purpose of setting the modified bit.  More specifically, this change
should prevent traps while holding locks in a sysctl handler.  See
kern/kern_sysctl.c revisions 1.168 and 1.195 (svn r192160) for further
details.

Tested by: gonzo
2009-05-23 07:58:56 +00:00
Marcel Moolenaar
dbb95048da Add cpu_flush_dcache() for use after non-DMA based I/O so that a
possible future I-cache coherency operation can succeed. On ARM
for example the L1 cache can be (is) virtually mapped, which
means that any I/O that uses temporary mappings will not see the
I-cache made coherent. On ia64 a similar behaviour has been
observed. By flushing the D-cache, execution of binaries backed
by md(4) and/or NFS work reliably.
For Book-E (powerpc), execution over NFS exhibits SIGILL once in
a while as well, though cpu_flush_dcache() hasn't been implemented
yet.

Doing an explicit D-cache flush as part of the non-DMA based I/O
read operation eliminates the need to do it as part of the
I-cache coherency operation itself and as such avoids pessimizing
the DMA-based I/O read operations for which D-cache are already
flushed/invalidated. It also allows future optimizations whereby
the bcopy() followed by the D-cache flush can be integrated in a
single operation, which could be implemented using on-chips DMA
engines, by-passing the D-cache altogether.
2009-05-18 18:37:18 +00:00
Ulf Lilleengen
ae28ded2c8 - Fix spelling. 2009-05-16 15:21:08 +00:00
Jun Kuriyama
b3b17597ea - Use "device\t" and "options \t" for consistency. 2009-05-10 00:00:25 +00:00
Alan Cox
7b89d46e0f A variety of changes:
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
2009-05-02 06:12:38 +00:00
Robert Watson
9725389e1e Don't conditionally define CACHE_LINE_SHIFT, as we anticipate sizing
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
2009-04-20 12:59:23 +00:00
Alan Cox
1c951556bc MFamd64/i386
Introduce pmap_try_insert_pv_entry(), a function that conditionally
  creates a pv entry if the number of entries is below the high water mark
  for pv entries.

  Introduce pmap_enter_quick_locked() and use it to reimplement
  pmap_enter_object().  The old implementation was broken.  For example,
  it could block while holding a mutex lock.

  Change pmap_enter_quick_locked() to fail rather than wait if it is
  unable to allocate a page table page.  This prevents a race between
  pmap_enter_object() and the page daemon.  Specifically, an inactive
  page that is a successor to the page that was given to
  pmap_enter_quick_locked() might become a cache page while
  pmap_enter_quick_locked() waits and later pmap_enter_object() maps
  the cache page violating the invariant that cache pages are never
  mapped.  Similarly, change
  pmap_enter_quick_locked() to call pmap_try_insert_pv_entry() rather
  than pmap_insert_entry().  Generally speaking,
  pmap_enter_quick_locked() is used to create speculative mappings.  So,
  it should not try hard to allocate memory if free memory is scarce.

Tested by:	gonzo
2009-04-20 03:44:54 +00:00
Robert Watson
22037b2d2c Add description and cautionary note regarding CACHE_LINE_SIZE.
MFC after:	2 weeks
Suggested by:	alc
2009-04-19 21:26:36 +00:00
Robert Watson
a93fa8f2bb For each architecture, define CACHE_LINE_SHIFT and a derived
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@
2009-04-19 20:19:13 +00:00
Dmitry Chagin
cd899aad76 Fix KBI breakage by r190520 which affects older linux.ko binaries:
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
2009-04-05 09:27:19 +00:00
Bjoern A. Zeeb
f19dafc798 Mark the declaration of bus_space_map 'static' as the implementation is.
Follow one of the two most common indent schemes in this file.
This unbreaks a few mips kernel builds.
2009-03-28 23:24:34 +00:00
Konstantin Belousov
a4f2b2b0c6 Add AT_EXECPATH ELF auxinfo entry type. The value's a_ptr is a pointer
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
2009-03-17 12:50:16 +00:00
Dmitry Chagin
32c01de21c Implement new way of branding ELF binaries by looking to a
".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)
2009-03-13 16:40:51 +00:00
Warner Losh
5c0691d91a make loop clearer that it isn't a mistake... 2009-03-03 19:22:24 +00:00
Warner Losh
7008762a18 It appears that none of the contents of this file are necessary, so
replace the amd64-ish version with a blank version.
2009-02-15 20:05:13 +00:00
Warner Losh
77bab78951 Remove stray __P() 2009-02-15 01:12:16 +00:00
Warner Losh
f3e39d2a7b Rewrite get_pv_entry() to match expectations of the rest of the
kernel.  Rather than just kick off the page daemon, we actively retire
more mappings.  The inner loop now looks a lot like the inner loop of
pmap_remove_all.

Also, get_pv_entry can't return NULL now, so remove panic if it did.

Reviewed by:	alc@
2009-02-12 01:14:49 +00:00
Warner Losh
6bf6f10d24 pmap_kenrel() was recently deleted from pmap.h. It was still used
here, but inconsistently.  Change all instances of it to kernel_pmap
to match rest of code.
2009-02-12 01:10:53 +00:00
Alan Cox
11bd9105b6 Eliminate an unused definition. 2009-02-10 06:08:28 +00:00
Oleksandr Tymoshenko
5defb9db6b - Fix in_cksum for big-endian MIPS: use correct compile-time check. 2009-02-08 23:43:36 +00:00
Warner Losh
3beb4f7ed3 Retire NO_DMA completely. 2009-02-08 08:13:36 +00:00
Warner Losh
40a70e188b Eliminate the PMAP_INLINE macro. It isn't really used here. If we
need to bring it back, we can.
2009-01-16 08:38:03 +00:00
Warner Losh
bf969a35eb Remove unused variable.
Minor style nits.
2009-01-16 08:30:22 +00:00
Oleksandr Tymoshenko
f624d2026a - pmap_track_modified was retired in r178606. Reintroducing it was a mistake.
Spotted by: alc@
2009-01-15 23:03:27 +00:00
Warner Losh
1435181496 Reduce diffs to p4 that were the result of a mismerge on my part. 2009-01-15 19:57:45 +00:00
Oleksandr Tymoshenko
16a296f7c9 MFp4:
- 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
2009-01-15 18:31:36 +00:00
Warner Losh
9703f72989 MFp4:
Remove Maxmem.  It isn't used elsewhere in the system at this point...
realmem is used instead.
2009-01-15 08:01:50 +00:00
Warner Losh
85c209c24d Call platform_reset() instead of looping forever on reboot.
# We likely need to have a default one of these that jumps to the rom boot
# address that's defined in the MIPS ISA.
2009-01-15 07:51:17 +00:00
Warner Losh
b1b26fc820 Reverse order of dumpsys and cpu_idle_wakeup to reduce diffs to p4. 2009-01-15 07:48:37 +00:00
Warner Losh
f180851318 MFp4:
Remove #if'd 0 code.  It is interfering with other diffs.
2009-01-15 07:45:40 +00:00
Oleksandr Tymoshenko
36dc08476d o Code cleanup, remove unused fields of idtpci_softc 2009-01-14 22:46:13 +00:00
Oleksandr Tymoshenko
00582be0e9 o Simplify code: trade 15 lines of case for one multiplication 2009-01-14 22:32:43 +00:00
Oleksandr Tymoshenko
8c7494de12 o Make debug output conditional 2009-01-14 20:36:58 +00:00
Oleksandr Tymoshenko
9f0e1e852e o NO_DMA is no longer required as bug with PIIX4 emulation has been fixed in GXEmul 2009-01-14 20:27:49 +00:00
Oleksandr Tymoshenko
7baa3c0132 o Move $FreeBSD$ from comment to __FBSDID macro
o Be a bit more verbose about CPU type during boot process (print
    manufacturer, chip info, MMU and cache parameters)
2009-01-14 20:16:44 +00:00
Warner Losh
703b345233 First pass at 64-bit elf support 2008-12-31 07:38:04 +00:00
Marcel Moolenaar
05002c354b Make gpart the default partitioning class on all platforms.
Both ia64 and powerpc were using gpart exclusively already
so there's no change for those two.

Discussed on: arch@
2008-12-17 17:43:22 +00:00
Warner Losh
db3cd725a5 AT_DEBUG and AT_BRK were OBE like 10 years ago, so retire them.
Reviewed by:	peter
2008-12-17 06:56:58 +00:00
Warner Losh
3bd6a14307 Start to clean up the MIPS elf machine dependent file.
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.
2008-12-16 20:07:47 +00:00
Warner Losh
f6bac15e68 Mips never had /usr/libexec/ld-elf.so.1, so remove it. We don't have
any binaries that need it.  This was moved before FreeBSD 5.x.
2008-12-16 20:04:02 +00:00
Warner Losh
a87b76397e Remove redundant assignment. 2008-12-11 07:00:23 +00:00
Sam Leffler
3364462355 Switch to ath hal source code. Note this removes the ath_hal
module; the ath module now brings in the hal support.  Kernel
config files are almost backwards compatible; supplying

device ath_hal

gives you the same chip support that the binary hal did but you
must also include

options AH_SUPPORT_AR5416

to enable the extended format descriptors used by 11n parts.
It is now possible to control the chip support included in a
build by specifying exactly which chips are to be supported
in the config file; consult ath_hal(4) for information.
2008-12-01 16:53:01 +00:00
Warner Losh
55a98c0d2e On FreeBSD, printing the version is centralized, so no need to repeat
it here.  I think that gonzo@ has also made this change to p4.
2008-11-30 08:40:04 +00:00
Warner Losh
1f2c9f3b84 Unbreak mips build by taking first WAG at mb(), wmb() and rmb(). The
latter two are likely pessimal...
2008-11-29 05:16:14 +00:00
Konstantin Belousov
b4cf0e62f4 Add sv_flags field to struct sysentvec with intention to provide description
of the ABI of the currently executing image. Change some places to test
the flags instead of explicit comparing with address of known sysentvec
structures to determine ABI features.

Discussed with:	dchagin, imp, jhb, peter
2008-11-22 12:36:15 +00:00
Warner Losh
795239ebe6 Remove cardbus attachment. It likely was a cut-n-paste left over from
whatever template was used to create this driver.  It is not
necessary, and wouldn't work anyway since (a) this device will never
be in a cardbus tin-can and (b) the driver isn't even PCI, but instead
a built-in NIC on the IDT RC32434 on its internal bus.
2008-11-02 02:58:24 +00:00
Marcel Moolenaar
fd872be586 Add mips/conf/DEFAULTS and populate it with:
machine arm
        device  mem
	device  uart_ns8250
        options GEOM_BSD
        options GEOM_MBR

Remove the first three from all kernel configuration files
(sometimes commented-out) and change geom_bsd and geom_mbr
from standard to optional.
2008-10-23 02:16:38 +00:00