Update the SH kernel to keep SR.BL set until the VBR
register has been initialized. Useful to allow boot
of the kernel even though exceptions are pending.

Without this patch there is a window of time when
exceptions such as NMI are enabled but no exception
handlers are installed.

This patch modifies both the zImage loader and the
actual kernel to boot with BL=1, but the zImage
loader is modfied in such a way that the init_sr
value is unchanged to not break the zImage loader
provided by kexec.

Tested on sh7724 Ecovec and on the SH4AL-DSP core
included in sh7372.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

kfree() in clkdev_drop() function should actually be called with an address of
a struct clk_lookup_alloc object, and not struct clk_lookup, as presently done.
This just happens to work, because "struct clk_lookup cl" is the first
member in struct clk_lookup_alloc.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

While sh previously had its own debugfs root, there now exists a
common arch_debugfs_dir prototype, so we switch everything over to
that.  Presumably once more architectures start making use of this
we'll be able to just kill off the stub kdebugfs wrapper.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Replace EXTRA_CFLAGS with ccflags-y.
Signed-off-by: Nmatt mooney <mfm@muteddisk.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This copies the pci_config_lock idea from x86 over, allowing us to kill
off a couple of existing private locks. At the same time, these need to
be converted to raw spinlocks for -rt kernels, so we make that change at
the same time. This should make it easier for future parts to get the
locking right instead of inevitable ending up with lock type mismatches.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This gets each port handling its MSTP bit, as well as moving the PHY
clock management in to the clock framework.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Some of the existing code is flipping between __raw_xxx() and
pci_{read,write}_reg(). As the latter are just wrappers for the former,
flip over to using them consistently.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Presently we error out if a link is disabled and simply drop the port
registration outright. This follows the PPC changes and simply reports on
the link state on boot, leaving the port registered, in order to more
easily deal with hotplug on future parts.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

These settings are properly propagated by the hardware already, so
there's no need to bother with them manually.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

The SH7786 PCIe is presently unable to enumerate itself in root complex
mode, and has no visibility through either type 0 or type 1 accesses,
despite having a mostly sensible extended config space for each port.
Attempts to generate type 0 or type 1 config cycles result in completer
aborts, so we're ultimately forced to use SuperHyway transactions
instead.

As each port has a single port <-> device mapping that resolves for any
PCI_SLOT definition, we simply hijack devfn 0 for the SuperHyway
transaction and bump up the devfn limit.

With enumeration of the root complex now possible, we also need to insert
an early fixup to hide the BARs from the kernel. With all of that done,
it's now possible to use the pcieport services with all of the PCIe
ports, which is the first step to power management support.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Previously these IDs were only used by one driver, so there was not much
need for having them generically defined. Now that this will no longer
hold true, move them over.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

The spec suggests waiting up to 500ms for the PHY to settle before
testing link state, but practice shows that 100ms is sufficient (this is
the delay value we also use on the other SH-4A PCI controllers, too).
This makes device detection much more reliable, although in the future it
should be a bit faster to simply serialize with a TLP IRQ.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

After configuration accesses have been completed deassert the
configuration access enable cleanly.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

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

The only BKL user in arch/sh protects a single bit,
so we can trivially replace it with test_and_set_bit.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: linux-sh@vger.kernel.org
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

According to Morimoto-san, this is no longer needed. Revert it.

This reverts commit e0009b0a.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Now that the rest of the socket calls are provided through their own
paths, do the same for sys_recvmmsg. It's unlikely we'll ever be able to
kill off the socketcall path, but this at least permits userspace to
gradually begin migrating.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Linux kernel already has socket syscalls that can be invoked
without the multiplexing sys_socketcall wrapper.
C library wrappers are ready to use them directly. It needs just
to define the missing syscall numbers and provide the related entries
into the syscalls table, like sh64 aleady does.
Signed-off-by: NFrancesco Rundo <francesco.rundo@st.com>
Signed-off-by: NCarmelo Amoroso <carmelo.amoroso@st.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This patch modify x_plate_ohms to correct value for tsc2007 panel,
and removed un-necessary ts_get_pendown_state()
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

As the help for the config option suggests, this option really shouldn't
be set by default for any recent distribution as it changes the layout
of sysfs. I spotted this while running debian when udev got very
confused by the sysfs layout and failed to create some device nodes.
Signed-off-by: NMatt Fleming <matt@console-pimps.org>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Now that the resource assignment issues are resolved, we can finally wire
up the small third memory window -- in the future we may reclaim this for
MSI.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

An IORESOURCE_IO was missing here, which meant that we weren't properly
establishing the I/O window for this particular slot. With this
corrected, cards with I/O BARs have them actually assigned and
accessible.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Certain memory windows are only available for 32-bit space, so skip over
these in 29-bit mode. This will severely restrict the amount of memory
that can be mapped, but since a boot loader bug makes booting in 29-bit
mode close to impossible anyways, everything is ok.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This bumps up the low address to match the physical memory windows for
SHway<->PCIe transfers. The previous implementation was banking on a 1:1
virt<->phys SHway mapping, which doesn't apply here.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This attempts a more complete port reset, building on top of the existing
approach.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NMatt Fleming <matt@console-pimps.org>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

These were newly added while the defconfig reduction work was ongoing,
strip them down now.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

SH7786 PCIe has 1 slot per port, but no specific restriction on function.
Relax the devfn restriction and look to the slot number instead when
configured as a root complex.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This brings the clocking and register setting in line with the somewhat
factually ambiguous specification.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This enables support for type 1 config space accesses on the SH7786
PCI controller. At the same time, add in some extra sanity checks for
controller asserted errors.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Make do_execve() take a const filename pointer so that kernel_execve() compiles
correctly on ARM:

arch/arm/kernel/sys_arm.c:88: warning: passing argument 1 of 'do_execve' discards qualifiers from pointer target type

This also requires the argv and envp arguments to be consted twice, once for
the pointer array and once for the strings the array points to.  This is
because do_execve() passes a pointer to the filename (now const) to
copy_strings_kernel().  A simpler alternative would be to cast the filename
pointer in do_execve() when it's passed to copy_strings_kernel().

do_execve() may not change any of the strings it is passed as part of the argv
or envp lists as they are some of them in .rodata, so marking these strings as
const should be fine.

Further kernel_execve() and sys_execve() need to be changed to match.

This has been test built on x86_64, frv, arm and mips.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Tested-by: NRalf Baechle <ralf@linux-mips.org>
Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This fixes up the nommu build with a stub definition for
__flush_tlb_global(), now used by the reboot code.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

sys_execve() now takes a const pointer, so reflect this change where the
syscall is actually defined, too. Fixes up a build error due to prototype
mismatch.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

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

When executing:

   make ARCH=sh defconfig

kconfig segfaulted.
kconfig should obviously not segfault.

But this indicated a problem in the sh files which was
tracked down to a recursive dependency.

We select HAVE_HW_BREAKPOINT and in the following line
we use the same symbol in an expression.
Drop the conditional as it is of no use.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Use the defconfig files generated by "make savedefconfig" for
remaining defconfig files.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

unifdef-y and header-y have same semantic, so drop unifdef-y
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Mark arguments to certain system calls as being const where they should be but
aren't.  The list includes:

 (*) The filename arguments of various stat syscalls, execve(), various utimes
     syscalls and some mount syscalls.

 (*) The filename arguments of some syscall helpers relating to the above.

 (*) The buffer argument of various write syscalls.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Architectures implement dma_is_consistent() in different ways (some
misinterpret the definition of API in DMA-API.txt).  So it hasn't been so
useful for drivers.  We have only one user of the API in tree.  Unlikely
out-of-tree drivers use the API.

Even if we fix dma_is_consistent() in some architectures, it doesn't look
useful at all.  It was invented long ago for some old systems that can't
allocate coherent memory at all.  It's better to export only APIs that are
definitely necessary for drivers.

Let's remove this API.
Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Reviewed-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

dma_get_cache_alignment returns the minimum DMA alignment.  Architectures
defines it as ARCH_DMA_MINALIGN (formally ARCH_KMALLOC_MINALIGN).  So we
can unify dma_get_cache_alignment implementations.

Note that some architectures implement dma_get_cache_alignment wrongly.
dma_get_cache_alignment() should return the minimum DMA alignment.  So
fully-coherent architectures should return 1.  This patch also fixes this
issue.
Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>