Commit graph

156816 commits

Author SHA1 Message Date
Paul Mundt
94ecd224c9 sh: Fix up the SH-5 build with caches enabled.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-16 01:50:17 +09:00
Paul Mundt
1ee4ab09f3 sh64: Build in support for generic stacktrace ops.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-16 00:55:38 +09:00
Paul Mundt
65305ae816 sh: Convert cache disabled SH-5 over to new cache interface.
The caches enabled case needs more work, but is presently broken
regardless, so this can be done incrementally.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-16 00:53:56 +09:00
Paul Mundt
eccee7457d sh: Kill off the unhandled pvr case in SH-4 CPU probing.
This is superfluous, as the default CPU type and family are already
established by the initial cpuinfo definition. Given that we are still
able to probe for the CPU family even if we are not able to detect the
subtype, it's preferable to let the probing code fill out what it can and
leave the rest.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 13:15:02 +09:00
Paul Mundt
0d051d90bb sh: Convert SH7705 extended mode to new cacheflush interface.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 12:53:39 +09:00
Paul Mundt
79f1c9da5e sh: Convert SH-3 to new cacheflush interface.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 12:42:55 +09:00
Paul Mundt
a58e1a2ab4 sh: Convert SH-2A to new cacheflush interface.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 12:38:29 +09:00
Paul Mundt
109b44a82a sh: Convert SH-2 to new cacheflush interface.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 12:35:15 +09:00
Paul Mundt
37443ef3f0 sh: Migrate SH-4 cacheflush ops to function pointers.
This paves the way for allowing individual CPUs to overload the
individual flushing routines that they care about without having to
depend on weak aliases. SH-4 is converted over initially, as it wires
up pretty much everything. The majority of the other CPUs will simply use
the default no-op implementation with their own region flushers wired up.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 12:29:49 +09:00
Paul Mundt
916e97834e sh: Kill off unused flush_icache_user_range().
We use flush_cache_page() outright in copy_to_user_page(), and nothing
else needs it, so just kill it off. SH-5 still defines its own version,
but that too will go away in the same fashion once it converts over.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 11:38:05 +09:00
Paul Mundt
7fbb2d3bdd sh: consolidate flush_dcache_mmap_lock/unlock() definitions.
All of the flush_dcache_mmap_lock()/flush_dcache_mmap_unlock()
definitions are identical across all CPUs, so just provide them
generically in asm/cacheflush.h.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 11:25:32 +09:00
Paul Mundt
0b445dcaf3 sh: Don't export flush_dcache_all().
flush_dcache_all() is used internally by the SH-4 cache code, it is not
part of the exported cache API, so make it static and don't export it.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 11:22:50 +09:00
Paul Mundt
27d59ec170 sh: Move alias computation to shared cache init.
This migrates the alias computation and printing of probed cache
parameters from the SH-4 code to the shared cpu_cache_init().

This permits other platforms with aliases to make use of the same
probe logic without having to roll their own, and also produces
consistent output regardless of platform.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 11:11:16 +09:00
Paul Mundt
ecba106058 sh: Centralize the CPU cache initialization routines.
This provides a central point for CPU cache initialization routines.
This replaces the antiquated p3_cache_init() method, which the vast
majority of CPUs never cared about.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 11:05:42 +09:00
Paul Mundt
e82da214d2 sh: Track the CPU family in sh_cpuinfo.
This adds a family member to struct sh_cpuinfo, which allows us to fall
back more on the probe routines to work out what sort of subtype we are
running on. This will be used by the CPU cache initialization code in
order to first do family-level initialization, followed by subtype-level
optimizations.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 10:48:13 +09:00
Paul Mundt
aae4d1428c sh: consolidate nommu stubs in arch/sh/mm/nommu.c.
These were previous littered around tlb-nommu.c and pg-nommu.c, though at
this point there are more stubs than are strictly TLB or page op related,
so just consolidate them in a single nommu.c.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 09:57:57 +09:00
Paul Mundt
dde5e3ffb7 sh: rework nommu for generic cache.c use.
This does a bit of reorganizing for allowing nommu to use the new
and generic cache.c, no functional changes.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 09:49:32 +09:00
Paul Mundt
cbbe2f68f6 sh: rename pg-mmu.c -> cache.c, enable generically.
This builds in the newly created cache.c (renamed from pg-mmu.c) for both
MMU and NOMMU configurations. The kmap_coherent() stubs and alias
information recorded by each CPU family takes care of doing the right
thing while enabling the code to be commonly shared.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 09:30:39 +09:00
Paul Mundt
2739742c24 sh: Provide the kmap_coherent() interface generically.
This plugs in kmap_coherent() for the non-SH4 cases to permit the
pg-mmu.c bits to be used generically across all CPUs. SH-5 is still in
the TODO state, but will move over to fixmap and the generic interface
gradually.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 09:19:19 +09:00
Paul Mundt
8edcfcbbd1 sh: Bail from kmap_coherent_init() if we have no dcache aliases.
This kills off the ifdef from kmap_coherent_init() and just bails if
there are no cache aliases. This permits the kmap coherent code to be
used on other CPUs.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 09:03:59 +09:00
Paul Mundt
d2dcd9101b Merge branch 'master' into sh/cachetlb 2009-08-15 05:58:45 +09:00
Paul Mundt
8010fbe7a6 sh: TLB fast path optimizations for load/store exceptions.
This only bothers with the TLB entry flush in the case of the initial
page write exception, as it is unecessary in the case of the load/store
exceptions.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 03:06:41 +09:00
Paul Mundt
112e58471d sh: TLB protection violation exception optimizations.
This adds a bit of rework to have the TLB protection violations skip the
TLB miss fastpath and go directly in to do_page_fault(), as these require
slow path handling.

Based on an earlier patch by SUGIOKA Toshinobu.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 02:49:40 +09:00
Paul Mundt
e7b8b7f16e sh: NO_CONTEXT ASID optimizations for SH-4 cache flush.
This optimizes for the cases when a CPU does not yet have a valid ASID
context associated with it, as in this case there is no work for any of
flush_cache_mm()/flush_cache_page()/flush_cache_range() to do. Based on
the the MIPS implementation.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 02:21:16 +09:00
Paul Mundt
795687265d sh64: Wire up the shared __flush_xxx_region() flushers.
Now with all of the prep work out of the way, kill off the SH-5 variants
and use the SH-4 version directly. This also takes advantage of the
unrolling that was previously done for the new version.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 02:00:54 +09:00
Paul Mundt
43bc61d86f sh: Add register alignment helpers for shared flushers.
This plugs in some register alignment helpers for the shared flushers,
allowing them to also be used on SH-5. The main rationale here is that
in the SH-5 case we have a variable ABI, where the pointer size may not
equal the register width. This register extension is taken care of by
the SH-5 code already today, and is otherwise unused on the SH-4 code.
This combines the two and allows us to kill off the SH-5 implementation.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 01:57:36 +09:00
Paul Mundt
606b4c992f sh: stacktrace: Properly terminate the trace entry buffer.
This inserts a ULONG_MAX entry at the end of the valid entries in the
stack trace buffer so the default code doesn't need to scan to the end of
available slots. This also makes the trace buffer termination behaviour
consistent with the other architectures.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 01:11:37 +09:00
Paul Mundt
f9967e23c1 sh: flag the default unwinder as reliable.
This flags the default unwinder as reliable, as it tends to be reliable
enough for the purposes of the stacktrace buffer. We leave the unreliable
cases for the unwind methods that we know to be completely broken.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 01:09:03 +09:00
Paul Mundt
48e4d4604b sh: stacktrace: Add reliability checks in address saving ops.
This adopts the reliability checks from the x86 stacktrace code so known
bad addresses are not recorded in the stack trace buffer.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 01:05:46 +09:00
Paul Mundt
0fc11e3618 sh: unwinder: Convert frame allocations to GFP_ATOMIC.
save_stack_trace_tsk() and friends can be called from atomic context (as
triggered by latencytop), and subsequently hit two problematic allocation
points that were using GFP_KERNEL (these were dwarf_unwind_stack() and
dwarf_frame_alloc_regs()). Convert these over to GFP_ATOMIC and get
latencytop working with the DWARF unwinder.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-14 23:58:37 +09:00
Paul Mundt
718dbf376a Merge branch 'sh/dwarf-unwinder' 2009-08-14 05:10:57 +09:00
Matt Fleming
f826466772 sh: Delete DWARF_ARCH_UNWIND_OFFSET
Trying to figure out the best value for DWARF_ARCH_UNWIND_OFFSET is
tricky at best. Various things can change the size (and offset from the
beginning of the function) of the prologue. Notably, turning on ftrace
adds calls to mcount at the beginning of functions, thereby pushing the
prologue further into the function.

So replace DWARF_ARCH_UNWIND_OFFSET with some code that continues to
execute CFA instructions until the value of return address register is
defined. This is safe to do because we know that the return address must
have been pushed onto the frame before our first function call; we just
can't figure out where at compile-time.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-14 05:00:21 +09:00
Paul Mundt
f54aab4a74 sh: oprofile: Kill off dead valid_kernel_stack().
This is no longer used, kill it off.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-14 04:59:50 +09:00
Paul Mundt
bf43a160ff sh: unwinder: Restore put_unaligned() for an unaligned destination.
The destination address might be unaligned, so set it with
put_unaligned() for safety. This restores the previous behaviour, albeit
through the proper API.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-14 03:06:13 +09:00
Paul Mundt
3497447f15 sh: unwinder: Fix up usage of unaligned accessors.
This was using internal symbols for unaligned accesses, bypassing the
exposed interface for variable sized safe accesses. This converts all of
the __get_unaligned_cpuXX() users over to get_unaligned() directly,
relying on the cast to select the proper internal routine.

Additionally, the __put_unaligned_cpuXX() case is superfluous given that
the destination address is aligned in all of the current cases, so just
drop that outright.

Furthermore, this switches to the asm/unaligned.h header instead of the
asm-generic version, which was silently bypassing the SH-4A optimized
unaligned ops.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-14 02:10:59 +09:00
Matt Fleming
cafb0ddac6 sh: Add CFI annotations for exception return.
Annotate various assembly code paths with CFI assembler directives so
that DWARF unwind info is available for the unwinder.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-14 02:02:07 +09:00
Matt Fleming
0b930489b8 sh: Setup the frame register in asm code
In order to use DWARF unwinder info the frame register has to contain a
valid value. Whilst GCC takes care of this for C code, we have to do it
ourselves for assembly.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-14 01:59:55 +09:00
Matt Fleming
bd353861c7 sh: dwarf unwinder support.
This is a first cut at a generic DWARF unwinder for the kernel. It's
still lacking DWARF64 support and the DWARF expression support hasn't
been tested very well but it is generating proper stacktraces on SH for
WARN_ON() and NULL dereferences.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-14 01:58:43 +09:00
Matt Fleming
0eff9f66de sh: Use the new stack unwinder API
Instead of implementing our own stack unwinder via dump_trace() we
should use the new stack unwinder API because it is more modular. This
change allows us to decouple the interface for generating stacktraces
from the implementation of a stack unwinder.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-13 19:52:53 +09:00
Matt Fleming
bf61ad1f87 sh: Allow multiple stack unwinders to be setup
Provide an interface for registering stack unwinders, where each
unwinder is given a rating that describes its accuracy and
complexity. The more accurate an unwinder is, the more complex it is.

If a the current stack unwinder faults, then the stack unwinder with the
next highest accuracy will be used in its place (provided one is
available). For example, this allows unwinders, such as the DWARF
unwinder, to liberally sprinkle BUG()s to catch badly formed DWARF debug
info.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-13 19:49:03 +09:00
Matt Fleming
4e14dfc722 sh: Use the generalized stacktrace ops
Copy the stacktrace ops code from x86 and provide a central function for
use by functions that need to dump a callstack.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-13 11:50:08 +09:00
Marcin Slusarz
922b0dc59b sh: use printk_once
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: linux-sh@vger.kernel.org
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-13 11:48:08 +09:00
Paul Mundt
e290861f99 Merge branch 'sh/stable-updates' 2009-08-13 11:48:01 +09:00
Magnus Damm
dbefd606a3 sh: fix i2c init order on ap325rxa V2
Convert the AP325RXA board code to register devices at
arch_initcall() time instead of device_initcall(). This
fix unbreaks pcf8563 RTC driver support.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-13 11:43:43 +09:00
Magnus Damm
ba3a170191 sh: fix i2c init order on Migo-R V2
Convert the Migo-R board code to register devices at
arch_initcall() time instead of __initcall(). This fix
unbreaks migor_ts touch screen driver support.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-13 11:39:02 +09:00
Magnus Damm
ba9a633787 sh: convert processor device setup functions to arch_initcall()
Convert the processor platform device setup
functions from __initcall() and sometimes
device_initcall() to arch_initcall().

This makes sure that the platform devices are
registered a bit earlier so the devices are
available when drivers register using initcall
levels earlier than device_initcall().

A good example is platform devices needed by
i2c-sh_mobile.c which registers a bit earlier
using subsys_initcall().

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-13 11:36:33 +09:00
Linus Torvalds
a3620f7545 Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  Remove double removal of blktrace directory
2009-08-12 09:55:46 -07:00
Alan D. Brunelle
39cbb602b5 Remove double removal of blktrace directory
commit fd51d251e4
Author: Stefan Raspl <raspl@linux.vnet.ibm.com>
Date:   Tue May 19 09:59:08 2009 +0200

    blktrace: remove debugfs entries on bad path

added in an explicit invocation of debugfs_remove for bt->dir, in
blk_remove_buf_file_callback we are also getting the directory removed. On
occasion I am seeing memory corruption that I have bisected down to
this commit. [The testing involves a (long) series of I/O benchmarks
with blktrace invoked around the actual runs.] I believe that this
committed patch is correct, but the problem actually lies in the code
in blk_remove_buf_file_callback.

With this patch I am able to consistently get complete runs whereas
previously I could not get a single run to complete.

The first part of the patch simply moves the debugfs_remove below the
relay_close: the relay_close call will remove files under bt->dir, and
so we should not remove the directory until all the files we created
have been removed. (Note: This is not sufficient to fix the problem -
the file system code has ref counts on the directoy, so our invocation
does not cause the directory to actually be removed. Nonetheless, we
should not rely upon that feature.)

Signed-off-by: Alan D. Brunelle <alan.brunelle@hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-08-12 18:50:08 +02:00
Linus Torvalds
78efd1ddd9 Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
* 'for-linus' of git://oss.sgi.com/xfs/xfs:
  xfs: fix spin_is_locked assert on uni-processor builds
  xfs: check for dinode realtime flag corruption
  use XFS_CORRUPTION_ERROR in xfs_btree_check_sblock
  xfs: switch to NOFS allocation under i_lock in xfs_attr_rmtval_get
  xfs: switch to NOFS allocation under i_lock in xfs_readlink_bmap
  xfs: switch to NOFS allocation under i_lock in xfs_attr_rmtval_set
  xfs: switch to NOFS allocation under i_lock in xfs_buf_associate_memory
  xfs: switch to NOFS allocation under i_lock in xfs_dir_cilookup_result
  xfs: switch to NOFS allocation under i_lock in xfs_da_buf_make
  xfs: switch to NOFS allocation under i_lock in xfs_da_state_alloc
  xfs: switch to NOFS allocation under i_lock in xfs_getbmap
  xfs: avoid memory allocation under m_peraglock in growfs code
2009-08-12 08:49:35 -07:00
Linus Torvalds
b637dc0dba Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
  ALSA: hda - Don't override ADC definitions for ALC codecs
  ALSA: hda - Add missing vmaster initialization for ALC269
  ASoC: Add missing DRV_NAME definitions for fsl/* drivers
2009-08-12 08:32:47 -07:00