Change to using flush_cache_all() in pm.c and
also remove the need to flush the cache in the
PM code.

This changes the sleep.S code to have an entry
to store the registers for resume, and then a
second entry (after the caches are cleaned)
to do the suspend and resume.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Seperate the IRQ power management code out of
the pm.c file, and add it to the relevant
system class devices.

Also make the suspend and resume code take
notice of the fact these registers can be
moved by compile time code.

Add fix from Ilya Yanok to also save the
INTSUBMSK over sleep.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

DMA channel mappings for the S3C2442
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

S3C2440 DMA channel mappings
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

DMA channel mappings for the S3C2410
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Allow each CPU type in the S3C24XX range to
select the DMA channel mapping it supports.

We change the DMA registration to use an
virtual channel number that the DMA system
will allocate to a hardware channel at
request time.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Daniel Jacobowitz

The ARM kernel has several uses of asm("foo%?").  %? is a GCC internal
modifier used to output conditional execution predicates.  However, no
version of GCC supports conditionalizing asm statements.  GCC 4.2 will
correctly expand %? to the empty string in user asms.  Earlier versions may
reuse the condition from the previous instruction.  In 'if (foo) asm
("bar%?");' this is somewhat likely to be right... but not reliable.

So, the only safe thing to do is to remove the uses of %?.  I believe
the tlbflush.h occurances were supposed to be removed before, based
on the comment about %? not working at the top of that file.

Old versions of GCC could omit branches around user asms if the asm didn't
mark the condition codes as clobbered.  This problem hasn't been seen on any
recent (3.x or 4.x) GCC, but it could theoretically happen.  So, where
%? was removed a cc clobber was added.
Signed-off-by: NDaniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

The common case for the thread notifier is a context switch.  Tell
gcc that this is the most likely condition so it can optimise the
function for this case.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This adds support for irqtrace for lockdep on ARM.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Rename mmu.c to context.c - it's the ARMv6 ASID context handling
code rather than generic "mmu" handling code.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Move top_pmd into arch/arm/mm/mm.h - nothing outside arch/arm/mm
references it.

Move the repeated definition of TOP_PTE into mm/mm.h, as well as
a few function prototypes.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Ben Dooks

Do not define set_irq_wake as a real function if
the CONFIG_PM option is not set.

Fixes bug reported by Thomas Gleixner.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Dan Williams

commit a6a38a66 changed the iop321 id to a value that does not work with all platforms.  Change the mask to permit bit 11.  Tested on an iq80321 600Mhz CRB.
Signed-off-by: NDan Williams <dan.j.williams@intel.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Vitaly Wool

This patch updates the default configuration file for PNX4008.

 arch/arm/configs/pnx4008_defconfig |  715 +++++++------------------------------
 1 file changed, 154 insertions(+), 561 deletions(-)
Signed-off-by: NVitaly Wool <vitalywool@gmail.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Ben Dooks

Fix the idle code on the s3c2412 as the default
code is using bits in the CLKCON register that are
no-longer there.

Provide an override for the idle code, and ensure
that the power configuration is set to allow idle
instead of stop or sleep.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Ben Dooks

These two machines are identical, and supported
by the SMDK2413 configuration. When MACH_SMDK2413
is selected, we must also select MACH_S3C2413
to allow machine_is_smdk2413() or machine_is_s3c2413()
to work.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Ben Dooks

The IRQ_EINT0 through IRQ_EINT3 handling has changed
on the S3C2412 from the previous SoCs in the range,
and thus we need to add code to handle this.

The changes come about due to these IRQs being
displayed in two different registers, and needing to
be acked and masked in both.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Ben Dooks

The s3c244x-irq.c code makes the mistake of adding
the same drive to two different sys-classes. This
causes the class lists to become corrupted and the
suspend code to OOPS.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Ben Dooks

It turns out we have both SMDK2413 and S3C2413 for
the same board.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Catalin Marinas

The ARM926EJ-S CPU has the VFP coprocessor and therefore it should be shown
in the /proc/cpuinfo if CONFIG_VFP is enabled.
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Martin Michlmayr

Include linux/irq.h in the nslu2 code in order to avoid the following
compiler error:

  CC      arch/arm/mach-ixp4xx/nslu2-power.o
arch/arm/mach-ixp4xx/nslu2-power.c: In function 'nslu2_power_init':
arch/arm/mach-ixp4xx/nslu2-power.c:53: warning: implicit declaration of function 'set_irq_type'
arch/arm/mach-ixp4xx/nslu2-power.c:53: error: 'IRQ_TYPE_LEVEL_LOW' undeclared (first use in this function)
arch/arm/mach-ixp4xx/nslu2-power.c:53: error: (Each undeclared identifier is reported only once
arch/arm/mach-ixp4xx/nslu2-power.c:53: error: for each function it appears in.)
arch/arm/mach-ixp4xx/nslu2-power.c:54: error: 'IRQ_TYPE_LEVEL_HIGH' undeclared (first use in this function)
make[5]: *** [arch/arm/mach-ixp4xx/nslu2-power.o] Error 1
Signed-off-by: NMartin Michlmayr <tbm@cyrius.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Ben Dooks

Remove the pointless changelog comments from
arch/arm/mach-s3c2410 files, as all this can
be found from the revision control system.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from George G. Davis

Resolve ARM1136 VIPT non-aliasing cache coherency issues observed when
using ptrace to set breakpoints and cleanup copy_{to,from}_user_page()
while we're here as requested by Russell King because "it's also far
too heavy on non-v6 CPUs".

NOTES:

1. Only access_process_vm() calls copy_{to,from}_user_page().
2. access_process_vm() calls get_user_pages() to pin down the "page".
3. get_user_pages() calls flush_dcache_page(page) which ensures cache
   coherency between kernel and userspace mappings of "page".  However
   flush_dcache_page(page) may not invalidate I-Cache over this range
   for all cases, specifically, I-Cache is not invalidated for the VIPT
   non-aliasing case.  So memory is consistent between kernel and user
   space mappings of "page" but I-Cache may still be hot over this
   range.  IOW, we don't have to worry about flush_cache_page() before
   memcpy().
4. Now, for the copy_to_user_page() case, after memcpy(), we must flush
   the caches so memory is consistent with kernel cache entries and
   invalidate the I-Cache if this mm region is executable.  We don't
   need to do anything after memcpy() for the copy_from_user_page()
   case since kernel cache entries will be invalidated via the same
   process above if we access "page" again.  The flush_ptrace_access()
   function (borrowed from SPARC64 implementation) is added to handle
   cache flushing after memcpy() for the copy_to_user_page() case.
Signed-off-by: NGeorge G. Davis <gdavis@mvista.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Ben Dooks

The type naming in the s3c24xx dma code is riddled with
typedefs creating _t types, from the code import from 2.4
which is contrary to the current Kernel coding style.

This patch cleans this up, removing the typedefs and
and fixing up the resultant code changes.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from David Brownell

This adds RTC support to the csb337 default config.  Both the AT91
and the ds1307 RTCs are enabled (rtc0 and rtc1 respectively).

The ds1307 is used to initialize the system time, since it's battery-backed.

From then on the AT91 RTC is used, since it's more capable (with both
alarm and update irqs, and system wakeup capability) even though it
needs manual initialization (symlink /dev/rtc to /dev/rtc0 for older
versions of hwclock, then "hwclock --systohc") in an rc script or
from inittab.
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Daniel Jacobowitz

vfp_put_double didn't work in a CONFIG_AEABI kernel.  By swapping
the arguments, we arrange for them to be in the same place regardless
of ABI.  I made the same change to vfp_put_float for consistency.
Signed-off-by: NDaniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Lennert Buytenhek

On armv4t systems, we have always compiled the kernel with -march=armv4
instead of -march=armv4t, which means that any use of bx will bomb out.

Commit ba9b5d76 introduced the use of
bx in the kernel, which means we need to compile with -march=armv4t on
armv4t systems now.
Signed-off-by: NLennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Add the necessary call to register_isa_ports() so that glibc knows
where these are found on Integrator platforms.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Convert isa.c (the glibc interface for emulating ISA IO) to use
named initialisers.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from David Brownell

Remove buld warning when building sa1111 on non-sa1100 platforms (e.g. PXA).
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Paul Sokolovsky

This patch adds timeouts while working with SSP registers. Such
timeouts were envisioned by docstrings in ssp.c, but were not
implemented. There were actual lockups while accessing
touchscreen for iPaqs h1910, h4000 due to lack of the timeouts.
This is updated version of previously submitted patch: 3738/1.
Signed-off-by: NPaul Sokolovsky <pmiscml@gmail.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Daniel Jacobowitz

The fcvtds and fcvtsd instructions were generating a qnan bit pattern
for both quiet and signalling NaNs.
Signed-off-by: NDaniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Daniel Jacobowitz

The fcvtsd/fcvtds emulation was left behind when the numbering of double
precision registers was changed from 0-30 to 0-15.  Both conversion
instructions were writing their results to the wrong register.  Also,
the conversion instructions should stop after the first element even
if a vector length is specified.
Signed-off-by: NDaniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Daniel Jacobowitz

The recent fix to hide VFP_NAN_FLAG broke the check in vfp_raise_exceptions;
it would attempt to deliver an exception mask of 0xfffffeff instead of reporting
a serious error condition using printk.  Define a safe constant to use for
an invalid exception maskm, and use it at both ends.
Signed-off-by: NDaniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Nicolas Pitre

The userspace helpers in clean/arch/arm/kernel/entry-armv.S are called
directly in/from userspace. They need to cope with being called from
Thumb code.

Patch below uses the bx interworking instruction when
CONFIG_ARM_THUMB=y.

Based on an earlier patch from Paul Brook <paul@codesourcery.com>
Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Catalin Marinas

This is instead of a magic number.
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Kevin Hilman

Previous locking changes to dmabounce incorrectly return non-NULL even
when buffer not found.  Fix it up.
Signed-off-by: NKevin Hilman <khilman@mvista.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Ben Dooks

tidy up the makefile by using TABs to indent, and ensure
that all items are indented the same.

Move the DMA to its own section, ready for the next set
of updates
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Ben Dooks

A number of small issues with the S3C24XX DMA have
cropped up, which this patch fixes. These are:

  - check wether we can load another buff in start
  - update state handling in s3c2410_dma_lastxfer
  - only reload in irq if channel is not idle
  - more informative timeout errors (add source)
  - do not call request_irq() with irqs locked
  - added waitforstop function

The patch also adds a S3C2410_DMAOP_STARTED for
the occasions when the driver wants to ensure that
the DMA system load state is resynced after loading.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>