There was a bug that got introduced when the split ptlock changes
went in where mm could be unintialized for user mappings, this
fixes it up..
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

We need this set to something sensible anywhere were we have
an aliasing dcache..
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

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>

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>

Some modules seem to need this, so we export it..
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

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>

Add support for the titan board.
Signed-off-by: Jamie Lenehan <lenehan@twibble.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

A synco is needed before we jump to start_kernel().

While we're at it, also move the sh_cpu_init() jump until after
we've zeroed BSS, as this has caused some undesirable results
in sh_cpu_init().
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Currently when making changes to control registers, we
typically need some time for changes to take effect (8
nops, generally).  However, for sh4a we simply need to
do an icbi..

This is a simple patch for implementing a general purpose
ctrl_barrier() which functions as a control register write
barrier. There's some additional documentation in the patch
itself, but it's pretty self explanatory.

There were also some places where we were not doing the
barrier, which didn't seem to have any adverse effects on
legacy parts, but certainly did on sh4a. It's safer to have
the barrier in place for legacy parts as well in these cases,
though this does make flush_tlb_all() more expensive (by an
order of 8 nops).  We can ifdef around the flush_tlb_all()
case for now if it's clear that all legacy parts won't have
a problem with this.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Add CPU_HAS_PTEA, refactor some of the cpu flag settings.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

This adds support for the I-O DATA Landisk.
Signed-off-by: kogiidena <kogiidena@eggplant.ddo.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Drop virt_to_bus() from sg_dma_address() so libata builds.
While we're at it, move sg_dma_address() and sg_dma_len()
from pci.h to scatterlist.h.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

There's a bug in the Hitachi SuperH csum_partial_copy_generic()
implementation.  If the supplied length is 1 (and several alignment
conditions are met), the function immediately branches to label 4.
However, the assembly at label 4 expects the length to be stored in
register r2.  Since this has not occurred, subsequent behavior is
undefined.

This can cause bad payload checksums in TCP connections.

I've fixed the problem by initializing register r2 prior to the branch
instruction.
Signed-off-by: Ollie Wild <aaw@rincewind.tv>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

We had a pretty interesting oops happening, where copy_user_page()
was down()'ing p3map_sem[] with a bogus offset (particularly, an
offset that hadn't been initialized with sema_init(), due to the
mismatch between cpu_data->dcache.n_aliases and what was assumed
based off of the old CACHE_ALIAS value).

Luckily, spinlock debugging caught this for us, and so we drop
the old hardcoded CACHE_ALIAS for sh4 completely and rely on the
run-time probed cpu_data->dcache.alias_mask. This in turn gets
the p3map_sem[] index right, and everything works again.

While we're at it, also convert to 4-level page tables..
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

The syscall table has lagged behind a bit, wire up the new ones..
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

It's defined in <linux/cpumask.h> and log is horribly flooded by
"redefined" messages.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Merge support for SH7770 and SH7780 SH-4A subtypes.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Update oprofile build rules for additional subtypes,
particularly SH7750S/SH7091.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Allow multiple early printk consoles via earlyprintk=.

With this change earlyprintk is no longer enabled by default,
it must be specified on the kernel command line. Optionally
with ,keep to prevent unreg by tty_io.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

SH-2/3/4 are able to prefetch, add support for it..
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Minor sign-extension bug in SH-specific memset()..
Signed-off-by: Toshinobu Sugioka <sugioka@itonet.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Newer SH7760 cuts have a range of acceptable PRR values..
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

This reworks some of the SH-4 cache handling code to more easily
accomodate newer-style caches (particularly for the > direct-mapped
case), as well as optimizing some of the old code.
Signed-off-by: Richard Curnow <richard.curnow@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

SH-4A supports 'synco' as a barrier, sprinkle it around
the cache ops as necessary..
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

More of the same, trivial cleanups, and moving options to their
own board-specific Kconfig.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Various cleanups for HS7751RVoIP. Mostly just getting
rid of the old mach.c and splitting codec configuration
in to its own Kconfig.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Update the SH DAC audio driver for the clock framework.
Signed-off-by: Andriy Skulysh <askulysh@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

suspend/resume support for hitfb, as well as some other
minor cleanups.
Signed-off-by: Andriy Skulysh <askulysh@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

With the I/O rework for hd64461 we're down to a single header,
so move it by itself and get rid of the directory.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

SH7300 has a different TMU_TOCR, make the TMU code work again.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Some of these have suffered some bitrot, and so there is
some degree of dead code that has been left sitting around,
clean it up..
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

We don't support this on SH, so just disable it..
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

For some of the larger sizes we permitted spanning pages
across several PTEs, but this turned out to not be generally
useful. This reverts the sh hugetlbpage interface to something
more sensible using huge pages at single PTE granularity.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Some minor cleanups for the updated consolidated hp6xx
mach-type.
Signed-off-by: Andriy Skulysh <askulysh@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

We had quite a bit of whitespace damage, clean most of it up..
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Arthur Othieno <a.othieno@bluewin.ch>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

These were previously sprinkled in machine_power_off(),
though missed being updated when the rest of the boards
switched over.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

We had a special .stack section in the ld script that
was being used to position r15 initially. This is
nonsensical, as we can just use a THREAD_SIZE offset
from the init_thread_union instead (as every other arch
does).
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

in_nmi shifted down a few labels, so we were inadvertently
clearing the lower byte of do_syscall_trace, badness ensues.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Move the syscall table in to its own file, as per sh64. The entry.S
bits will end up being considerably different in the sh2/sh2a cases,
so this lets us keep things in sync somewhat..
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Fix use of uninitialized spinlocks, caught with spinlock debugging..
Signed-off-by: Paul Mundt <lethal@linux-sh.org>