As explained in commit 1c0fe6e3, we want to call the architecture independent
oom killer when getting an unexplained OOM from handle_mm_fault, rather than
simply killing current.

Cc: linux-sh@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Signed-off-by: NNick Piggin <npiggin@suse.de>
Acked-by: NDavid Rientjes <rientjes@google.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

All of the regular CPU init path needs to be __cpuinit annotated for CPU
hotplug.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This does a detect_cpu_and_cache_system() -> cpu_probe() rename, tidies
up the unused return value, and stuffs it under __cpuinit in preparation
for CPU hotplug.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This follows the x86 change and kills off the unthrottle stub. As the x86
change killed off the generic callback it isn't used anymore anyways.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This zeroes out the number of cache aliases in the cache info descriptors
when hardware alias avoidance is enabled. This cuts down on the amount of
flushing taken care of by common code, and also permits coherency control
to be disabled for the single CPU and 4k page size case.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Previously the struct module definition was pulled in from other headers,
but we want the reference to be explicit. Fixes up randconfig build
issues.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

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: NPaul Mundt <lethal@linux-sh.org>

This wires up power-off support for the SDK7786 board.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This implements support for hardware-managed IRQ balancing as implemented
by SH-X3 cores (presently only hooked up for SH7786, but can probably be
carried over to other SH-X3 cores, too).

CPUs need to specify their distribution register along with the mask
definitions, as these follow the same format. Peripheral IRQs that don't
opt out of balancing will be automatically distributed at the whim of the
hardware block, while each CPU needs to verify whether it is handling the
IRQ or not, especially before clearing the mask.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Make sure that the timer IRQs and IPIs aren't enabled for IRQ balancing.
IPIs are disabled as a result of being percpu while the timers simply
disable balancing outright.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This adds support for hardware-assisted userspace irq masking for
special priority levels. Due to the SR.IMASK interactivity, only some
platforms implement this in hardware (including but not limited to
SH-4A interrupt controllers, and ARM-based SH-Mobile CPUs). Each CPU
needs to wire this up on its own, for now only SH7786 is wired up as an
example.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Hook up DMAC0 on SH7786.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Presently address translation is default-enabled regardless of whether
CONFIG_MMU is set or not in the SH-4 case, this fixes it up, and also
makes the control init word a bit more readable in the process.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

While the MMUCR.URB and ITLB/UTLB differentiation works fine for all SH-4
and later TLBs, these features are absent on SH-3. This splits out
local_flush_tlb_all() in to SH-4 and PTEAEX copies while restoring the
old SH-3 one, subsequently fixing up the build.

This will probably want some further reordering and tidying in the
future, but that's out of scope at present.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This is needed with some of the tracing code built as modules, so provide
the export.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Conver to TMU clock lookups for SH7724.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Convert to TMU clock lookups for SH7723.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Kills off clock string usage, using the new function clock definition
instead.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Kills off clock string usage, using the new function clock definition
instead.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Kills off clock string usage, using the new function clock definition
instead.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Now with the lookup aliases in place there is no longer any need to
provide the clock string, kill it off for all legacy CPG CPUs.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

For the CPUs that have not yet been converted off of legacy CPG we
provide some pclk aliases in order to make driver migration easier.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Convert to TMU clock lookups for SH7785.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This plugs in clkdev lookups for the SH7786 clocks and migrates off of
clock string usage for the TMU clocks.

Previously the TMU clocks were aliased to the peripheral clock, so this
gets the driver actually toggling the proper clocks now as well.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Export the status of the utlb and itlb entries through debugfs.
Signed-off-by: NMatt Fleming <matt@console-pimps.org>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

For the boot, enable_mmu() is called from setup_arch() but we don't call
setup_arch() for any of the other cpus. So turn on the non-boot cpu's
mmu inside of start_secondary().

I noticed this bug on an SMP board when trying to map I/O memory
(smsc911x registers) into the kernel address space. Since the Address
Translation bit in MMUCR wasn't set, accessing the virtual address where
the smsc911x registers were supposedly mapped actually performed a
physical address access.
Signed-off-by: NMatt Fleming <matt@console-pimps.org>
Cc: stable@kernel.org
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Ensure that the aux table is properly initialized, even when optional
features are missing. Without this, the FDPIC loader did not work.
Signed-off-by: NAndrew Stubbs <ams@codesourcery.com>
Cc: stable@kernel.org
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Use set_cpus_allowed_ptr rather than set_cpus_allowed.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression E1,E2;
@@

- set_cpus_allowed(E1, cpumask_of_cpu(E2))
+ set_cpus_allowed_ptr(E1, cpumask_of(E2))

@@
expression E;
identifier I;
@@

- set_cpus_allowed(E, I)
+ set_cpus_allowed_ptr(E, &I)
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NYusuke Goda <goda.yusuke@renesas.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Presently the TLB wiring code depends on MMUCR.URB for working out where
to place the wired entry, but fails to take the replacment counter in to
consideration. This fixes up the wiring logic and ensures that wired
entries remain so.
Signed-off-by: NMatt Fleming <matt@console-pimps.org>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Create a common platform data header file for the
shdma dmaengine driver. This is done by moving
common structures from sh asm/dmaengine.h to
linux/sh_dma.h. DMA registers are also copied from
sh asm/dma-register.h to make the code architecture
independent.

The sh header file asm/dmaengine.h is still kept
with the slave id enum. This allows us to keep the
old processor specific code as is and slowly move
over to slave id enums in per-processor headers.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Move SHDMA_SLAVE_NUMBER from asm/dmaengine.h to
shdma.h. Set it to 256 to support a wide range
of processors. The amount of memory consumed by
this change is limited to 256 bits.

While at it, rename to SH_DMA_SLAVE_NUMBER to
match with the rest of the file.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Acked-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This patch replaces the sh_dmae_slave_chan_id enum
with an unsigned int. The purpose of this chainge is
to make it possible to separate the slave id enums
from the dmaengine header.

The slave id enums varies with processor model, so in
the future it makes sense to put these in the processor
specific headers together with the pinmux enums.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

The parent rb_node needs to be initialized to shut up the compiler, even
though we're unlikely to ever hit this issue at run time.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

select_idle_routine() and register_sh_pmu() both needed their annotations
fixed up to silence section mismatch warnings.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

set_pmb_entry() is now only used by a function that is wrapped in #ifdef
CONFIG_PM, so wrap set_pmb_entry() in CONFIG_PM too.
Signed-off-by: NMatt Fleming <matt@console-pimps.org>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Setting the TI in MMUCR causes all the TLB bits in MMUCR to be
cleared. Unfortunately, the TLB wired bits are also cleared when setting
the TI bit, causing any wired TLB entries to become unwired.

Use local_flush_tlb_all() which implements TLB flushing in a safer
manner by using the memory-mapped TLB registers. As each CPU has its own
PMB the modifications in pmb_init() only affect the local CPU, so only
flush the local CPU's TLB.
Signed-off-by: NMatt Fleming <matt@console-pimps.org>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

flush_tlb_page() can be used to flush TLB entries that map executable
pages. Therefore, we need to ensure that the ITLB is also flushed in
local_flush_tlb_page().
Signed-off-by: NMatt Fleming <matt@console-pimps.org>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

interruptible_sleep_on() is referenced for use in the mid_sched macro
which is not used anywhere.  Remove reference and macro as well as the
comment which appears to belong with them.
Signed-off-by: NAndreas Bombe <aeb@debian.org>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NKuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>