Commit Graph

33 Commits

Author SHA1 Message Date
Paul Mundt 2ec08e141f sh64: Fix up caller-save register settings for fast-path.
Now that the fast-path handler has been moved, we also need to update the
Makefile to ensure that the same restrictions for caller-save registers
are observed.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-05-14 16:46:07 +09:00
Paul Mundt 28080329ed sh: Enable shared page fault handler for _32/_64.
This moves the now generic _32 page fault handling code to a shared place
and adapts the _64 implementation to make use of it.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-05-14 15:33:28 +09:00
Chris Smith d4f7e51323 sh: Enable CONFIG_GCOV_PROFILE_ALL for sh
This patch enables gcov kernel profiling over the whole kernel for sh.
Profiling of specific files individually already worked. A handful of
files have to be explicitly excluded from the profiling to avoid
breaking things, notably pmb.c.

Signed-off-by: Chris Smith <chris.smith@st.com>
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-02-15 16:47:17 +09:00
Paul Mundt 667b279baa sh: lockless get_user_pages_fast()
Implement get_user_pages_fast without locking in the fastpath on sh.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-27 16:43:08 +09:00
Paul Mundt c993487ec8 sh: Provide a generic SRAM pool for tiny memories.
This sets up a generic SRAM pool for CPUs and platform code to insert
their otherwise unused memories into. A simple alloc/free interface is
provided (lifed from avr32) for generic code.

This only applies to tiny SRAMs that are otherwise unmanaged, and does
not take in to account the more complex SRAMs sitting behind transfer
engines, or that employ an I/D split.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-15 02:09:00 +09:00
matt mooney a234ca0faa sh: change to new flag variable
Replace EXTRA_CFLAGS with ccflags-y.

Signed-off-by: matt mooney <mfm@muteddisk.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-09-23 16:18:18 +09:00
Paul Mundt 3cf6fa1e33 sh: Enable SH-X3 hardware synonym avoidance handling.
This enables support for the hardware synonym avoidance handling on SH-X3
CPUs for the case where dcache aliases are possible. icache handling is
retained, but we flip on broadcasting of the block invalidations due to
the lack of coherency otherwise on SMP.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-04-19 17:27:17 +09:00
Matt Fleming 6ae6650232 sh: tlb debugfs support.
Export the status of the utlb and itlb entries through debugfs.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-03-29 15:24:54 +09:00
Paul Mundt 9edef28653 sh: uncached mapping helpers.
This adds some helper routines for uncached mapping support. This
simplifies some of the cases where we need to check the uncached mapping
boundaries in addition to giving us a centralized location for building
more complex manipulation on top of.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-02-17 16:28:00 +09:00
Paul Mundt bb29c677b3 sh: Split out MMUCR.URB based entry wiring in to shared helper.
Presently this is duplicated between tlb-sh4 and tlb-pteaex. Split the
helpers out in to a generic tlb-urb that can be used by any parts
equipped with MMUCR.URB.

At the same time, move the SH-5 code out-of-line, as we require single
global state for DTLB entry wiring.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-19 15:20:35 +09:00
Paul Mundt 0b59e38ffa sh: Merge _32/_64 ioremap implementations.
There is nothing of interest in the _64 version anymore, so the _32 one
can be renamed and used unconditionally.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-18 21:21:32 +09:00
Matt Fleming 4d35b93a66 sh: Add fixed ioremap support
Some devices need to be ioremap'd and accessed very early in the boot
process. It is not possible to use the standard ioremap() function in
this case because that requires kmalloc()'ing some virtual address space
and kmalloc() may not be available so early in boot.

This patch provides fixmap mappings that allow physical address ranges
to be remapped into the kernel address space during the early boot
stages.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
2010-01-16 14:31:36 +00:00
Paul Mundt a0ab36689a sh: fixed PMB mode refactoring.
This introduces some much overdue chainsawing of the fixed PMB support.
fixed PMB was introduced initially to work around the fact that dynamic
PMB mode was relatively broken, though they were never intended to
converge. The main areas where there are differences are whether the
system is booted in 29-bit mode or 32-bit mode, and whether legacy
mappings are to be preserved. Any system booting in true 32-bit mode will
not care about legacy mappings, so these are roughly decoupled.

Regardless of the entry point, PMB and 32BIT are directly related as far
as the kernel is concerned, so we also switch back to having one select
the other.

With legacy mappings iterated through and applied in the initialization
path it's now possible to finally merge the two implementations and
permit dynamic remapping overtop of remaining entries regardless of
whether boot mappings are crafted by hand or inherited from the boot
loader.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-13 18:31:48 +09:00
Paul Mundt a99eae5417 sh: Split out the unaligned counters and user bits.
This splits out the unaligned access counters and userspace bits in to
their own generic interface, which will allow them to be wired up on sh64
too.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-12 16:12:25 +09:00
Matt Fleming 2a5eacca85 sh: Move page table allocation out of line
We also switched away from quicklists and instead moved to slab
caches. After benchmarking both implementations the difference is
negligible. The slab caches suit us better though because the size of a
pgd table is just 4 entries when we're using a 3-level page table layout
and quicklists always deal with pages.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
2010-01-02 01:02:25 +00:00
Matt Fleming 20b5014b3e sh: Fold fixed-PMB support into dynamic PMB support
The initialisation process differs for CONFIG_PMB and for
CONFIG_PMB_FIXED. For CONFIG_PMB_FIXED we need to register the PMB
entries that were allocated by the bootloader.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-10-10 21:52:34 +09:00
Paul Mundt e055d41ff5 sh: Build fix for disabled caches.
This fixes up the build when caches are disabled, by linking in all of
the cache routines directly. This paves the way for splitting out
separate I and D cache disabling, similar to what sh64 had, and which
we want for SH-X3 anyways.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-19 17:57:01 +09:00
Paul Mundt 1b3edd9745 sh: Merge the _32/_64 variants of arch/sh/mm/Makefile.
Now that there is sufficient shared infrastructure, merge the Makefiles.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-16 03:49:21 +09:00
Paul Mundt 83ce3ac1d1 sh: Split out extable.c _32 and _64 variants.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28 13:18:44 +09:00
Paul Mundt 36bcd39dbc sh: Split out 29-bit and 32-bit physical mode definitions.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28 13:18:42 +09:00
Paul Mundt 98366c20a2 sh: Add -Werror for clean directories.
Follow the MIPS and sparc64 changes for -Werror instrumentation.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-07 11:13:55 +09:00
Paul Mundt 8328a8ba92 sh: nommu: Kill off dummy page fault ops for SH-3/4.
We stopped referencing these functions unconditionally when the
old entry.S code was refactored, so this is just dead code at
present. Kill it off.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-09-24 16:40:56 +09:00
Paul Mundt ac38e4d33d sh: Fix cache disabling build failures on nommu.
The cache disabling stuff screwed up some of the sh4 nommu
builds, fix it up again.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-09-21 11:57:47 +09:00
Paul Mundt e7bd34a15b sh: Support explicit L1 cache disabling.
This reworks the cache mode configuration in Kconfig, and allows for
explicit selection of write-back/write-through/off configurations.
All of the cache flushing routines are optimized away for the off
case.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-09-21 11:57:46 +09:00
Paul Mundt 56c74c733c sh: Don't include fault-nommu on SH-2/SH-2A.
fault-nommu defines the page fault handler stubs for SH-3/4 parts,
but is not needed on SH-2/SH-2A now that the entry code has been
logically separated.

Add it in for SH-3 and SH-4 explicitly.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-08-01 16:26:21 +09:00
Paul Mundt a1e2833d13 sh: Kill off broken dma page ops.
There's no point in keeping these around, they've been broken
for some time, and the dmaenging/async_tx framework provides a
far more reasonable interface.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-06-11 15:56:31 +09:00
Paul Mundt b241cb0c88 sh: Support for multiple nodes.
This adds basic support for multiple nodes on SH machines.
This is primarily useful for boards with many different
memory blocks that are otherwise unused (SH7722/SH7785 URAM
and so forth).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-06-08 02:43:49 +00:00
Paul Mundt 15f57a29a1 sh: Add support for cacheline poking through debugfs.
A simple debugging aid for easier visibility of the respective
cachelines.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 17:51:01 +09:00
Yoshinori Sato a2d1a5fae6 sh: __addr_ok() and other misc nommu fixups.
A few more outstanding nommu fixups..

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 17:25:07 +09:00
Paul Mundt d7cdc9e8ac sh: ioremap() overhaul.
ioremap() overhaul. Add support for transparent PMB mapping, get rid of
p3_ioremap(), etc. Also drop ioremap() and iounmap() routines from the
machvec, as everyone can use the generic ioremap() API instead. For PCI
memory apertures and other special cases, use the pci_iomap() API, as
boards are already required to get the mapping right there.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 15:16:42 +09:00
Paul Mundt 26ff6c11ef sh: page table alloc cleanups and page fault optimizations.
Cleanup of page table allocators, using generic folded PMD and PUD
helpers. TLB flushing operations are moved to a more sensible spot.

The page fault handler is also optimized slightly, we no longer waste
cycles on IRQ disabling for flushing of the page from the ITLB, since
we're already under CLI protection by the initial exception handler.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 15:13:36 +09:00
Paul Mundt 0c7b1df69c sh: SH-4A Privileged Space Mapping Buffer (PMB) support.
Add support for 32-bit physical addressing through the SH-4A
Privileged Space Mapping Buffer (PMB).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 15:08:07 +09:00
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00