This implements initial support for the vsyscall page on SH.
At the moment we leave it configurable due to having nommu
to support from the same code base. We hook it up for the
signal trampoline return at present, with more to be added
later, once uClibc catches up.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

We want to be able to use PAGE_SIZE all over the place,
this is the same approach adopted by other architectures..
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This implements preliminary support for the L2 caches found
on newer SH-4A CPUs.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This was falling a bit behind..
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Implement optimized copies of readsl()/writesl().
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Add llsc to cpu_flags[] and comment cpu-features.h.
Signed-off-by: NJamie Lenehan <nynaeve@twibble.org>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Encode processor flags in AT_HWCAP in the ELF auxiliary vector.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This enables support for 4K stacks on SH.

Currently this depends on DEBUG_KERNEL, but likely all boards
will switch to this as the default in the future.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This adds a DEBUG_STACK_USAGE and DEBUG_STACKOVERFLOW for SH.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Some more machvec overhauling and setup code cleanup. Kill off
get_system_type() and platform_setup(), we can do these both
through the machvec. While we're add it, kill off more useless
mach.c's and drop some legacy cruft from setup.c.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This adds support for the SE7343 board.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

None of these have been maintained in years, and no one seems to
be interested in doing so, so just get rid of them.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

SH-4A implements LL/SC instructions, so we implement a simple
set of atomic operations using these.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

With the new RTC class driver, we can get rid of most of the
old left over cruft.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This adds support for the SHMIN SH7706 board.
Signed-off-by: NTakashi YOSHII <takasi-y@ops.dti.ne.jp>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This adds support for the aforementioned CPU subtypes, and cleans
up some build issues encountered as a result.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

sh-sci needs to be able to define its number of ports to
support, we do this with a config option, like most other
ports do.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This implements support for ppoll() and pselect6()..
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

A few more outstanding nommu fixups..
Signed-off-by: NYoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This fixes up some of the various outstanding nommu bugs on
SH.
Signed-off-by: NYoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

nommu needs to be able to shift PAGE_OFFSET, so we switch it to a
non-user-visible CONFIG_PAGE_OFFSET and use that in the few places
where it matters.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Other boards require this as well, so move it out of the
rts7751r2d directory.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This implements initial math-emu support, aimed primarily at SH-3.
Signed-off-by: NTakashi YOSHII <takasi-y@ops.dti.ne.jp>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

We have a clash with RTC_CLASS over these names, so we
change them..
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Drop TIF_USERSPACE and add addr_limit to the thread_info struct.
Subsequently, use that for address checking in strnlen_user() to
ward off bogus -EFAULTs.

Make __strnlen_user() return 0 on exception, rather than -EFAULT.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Nothing exciting here, just trivial fixes..
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This cleans up quite a lot of the PCI mess that we
currently have, and attempts to consolidate the
duplication in the SH7780 and SH7751 PCI controllers.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Some kgdb cleanup. Move hexchars/highhex/lowhex to the header, so it can
be reused by sh-sci. Also drop silly ctrl_inl/outl() overloading being
done by the kgdb stub.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This adds some simple PM stubs and the basic APM interfaces,
primarily for use by hp6xx, where the existing userland
expects it.
Signed-off-by: NAndriy Skulysh <askulysh@gmail.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Drop _PAGE_SHARED/_PAGE_U0_SHARED and document Linux PTE encodings in
the PTEL value. Preserve the swap cache entry encoding semantics for
now, though it will need rework to free up _PAGE_WT from _PAGE_FILE.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Make __xchg() a macro, so that gcc 4.0 doesn't blow up thanks to
always_inline..
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Initial register bank cleanup. Make SR.RB configurable, and add some
preliminary documentation on register bank usage within the kernel.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This adds support for the Renesas SH7780 development boards,
R7780RP and R7780MP.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Rewrite the store queue API for a per-cpu interface in the driver
model. The old miscdevice is dropped, due to TASK_SIZE limitations,
and no one was using it anyways.

Carve up and allocate store queue space with a bitmap, back sq
mapping objects with a slab cache, and let userspace worry about
its own prefetching.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This updates the various boards for some of the recent I/O routine
updates.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

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

Add support for 32-bit physical addressing through the SH-4A
Privileged Space Mapping Buffer (PMB).
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

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