There are two parts of changes. The first is just enable
PCI in Makefiles and in Kconfig. The second is the rest of
missing files. I didn't want to add it with previous patch
because that patch is too big.

Current Microblaze toolchain has problem with weak symbols
that's why is necessary to apply this changes to be possible
to compile pci support.
Xilinx knows about this problem.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Add pci-common.h and pci32.c. Files are based on PPC version.
There are removed ppc specific parts and the code was completely
clean.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Add pci-bridge.h for Microblaze. It is based on powerpc header file.
My changes:
I removed PPC_ prefix from constants
Removed ppc64 specifis parts
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Add pci.h for microblaze. It is based on powerpc pci.h
Signed-off-by: NMichal Simek <monstr@monstr.eu>

I need to use generic/iomap.h for PCI that's why is necessary
to include it and fix ioport_{map,unmap} functions.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Support function for PCI. We don't use any advance mapping mechanism
that's why implementation is simple.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

I will need {z,}alloc_maybe_bootmem functions for pci patches
Signed-off-by: NMichal Simek <monstr@monstr.eu>

There is necessary to do some cache handling for dma operations.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Add DMA support for Microblaze. There are some part of this new feature:
1. Basic DMA support
2. Enable DMA debug option
3. Setup notifier

Ad 1. dma-mapping come from powerpc and x86 version and it is based on
generic dma-mapping-common.h

Ad 2. DMA support debug features which is used in generic file.
For more information please look at Documentation/DMA-API.txt

Ad 3. notifier is very important to setup dma_ops. Without this part
for example ll_temac driver failed because there are no setup dma operations.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Trailing semicolon causes compilation involving out_le32() to fail.
Signed-off-by: NSteven J. Magnani <steve@digidescorp.com>
Signed-off-by: NMichal Simek <monstr@monstr.eu>

I create wrong asm code but none test shows that this part of code is wrong.
I am not convinces that were good idea to create asm optimized macros
for caches. The reason is that there is not optimization with previous code
that's why make sense to add old code and do some benchmarking which
functions are faster.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

On VIVT ARM, when we have multiple shared mappings of the same file
in the same MM, we need to ensure that we have coherency across all
copies.  We do this via make_coherent() by making the pages
uncacheable.

This used to work fine, until we allowed highmem with highpte - we
now have a page table which is mapped as required, and is not available
for modification via update_mmu_cache().

Ralf Beache suggested getting rid of the PTE value passed to
update_mmu_cache():

  On MIPS update_mmu_cache() calls __update_tlb() which walks pagetables
  to construct a pointer to the pte again.  Passing a pte_t * is much
  more elegant.  Maybe we might even replace the pte argument with the
  pte_t?

Ben Herrenschmidt would also like the pte pointer for PowerPC:

  Passing the ptep in there is exactly what I want.  I want that
  -instead- of the PTE value, because I have issue on some ppc cases,
  for I$/D$ coherency, where set_pte_at() may decide to mask out the
  _PAGE_EXEC.

So, pass in the mapped page table pointer into update_mmu_cache(), and
remove the PTE value, updating all implementations and call sites to
suit.

Includes a fix from Stephen Rothwell:

  sparc: fix fallout from update_mmu_cache API change
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Neither request_OF_resource or release_OF_resource are defined
anywhere.  Remove the declarations.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: NMichal Simek <monstr@monstr.eu>

Rather than defining of_chosen in each arch, it can be defined for all
in driver/of/base.c
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: NMichal Simek <monstr@monstr.eu>

Neither the powerpc nor the microblaze code use devtree_lock anymore.
Remove the extern reference.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: NMichal Simek <monstr@monstr.eu>

Most architectures don't need to change these.  Put them into common
code to eliminate some duplication
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: NMichal Simek <monstr@monstr.eu>

We don't always have lmb available, so make arches provide an
early_init_dt_alloc_memory_arch() to handle the allocation of
memory in the fdt code.

When we don't have lmb.h included, we need asm/page.h for __va.
Signed-off-by: NJeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: NMichal Simek <monstr@monstr.eu>

At present, the fdt code sets the kernel-wide initrd_start and
initrd_end variables when parsing /chosen. On ARM, we only set these
once the bootmem has been reserved.

This change adds an arch hook to setup the initrd from the device
tree:

 void early_init_dt_setup_initrd_arch(unsigned long start,
				      unsigned long end);

The arch-specific code can then setup the initrd however it likes.

Compiled on powerpc, with CONFIG_BLK_DEV_INITRD=y and =n.
Signed-off-by: NJeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Merge common code between PowerPC and Microblaze architectures.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NMichal Simek <monstr@monstr.eu>

Merge common function between powerpc, sparc and microblaze. Code is
identical for powerpc and microblaze, but adds a lock (and release) of
the devtree_lock on sparc.
Signed-off-by: NJeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Merge common code between PowerPC and Microblaze
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Tested-by: NWolfram Sang <w.sang@pengutronix.de>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

Microblaze only has one CPU, it isn't SMP at all.  early_init_dt_scan_cpus()
is effectively just a no-op, so remove it.

Microblaze doesn't support hypervisor assisted dump either, so the phyp stuff
can also go.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NMichal Simek <monstr@monstr.eu>

We found that on write-trough kernel is necessary to do that invalidation.
One WB is possible to use invalidation too.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Interrupts must be disabled while an interrupt state restore
(prep for interrupt return) is in progress.
Code to do this was lost in the port to the mainline kernel.
Signed-off-by: NSteven J. Magnani <steve@digidescorp.com>
Signed-off-by: NMichal Simek <monstr@monstr.eu>

There were several changes in Microblaze defconfig that's why
is good to update defconfigs.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

In struct device_node, the phandle is named 'linux_phandle' for PowerPC
and MicroBlaze, and 'node' for SPARC.  There is no good reason for the
difference, it is just an artifact of the code diverging over a couple
of years.  This patch renames both to simply .phandle.

Note: the .node also existed in PowerPC/MicroBlaze, but the only user
seems to be arch/powerpc/platforms/powermac/pfunc_core.c.  It doesn't
look like the assignment between .linux_phandle and .node is
significantly different enough to warrant the separate code paths
unless ibm,phandle properties actually appear in Apple device trees.

I think it is safe to eliminate the old .node property and use
phandle everywhere.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Tested-by: NWolfram Sang <w.sang@pengutronix.de>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

Merge common code between PowerPC and MicroBlaze
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Tested-by: NWolfram Sang <w.sang@pengutronix.de>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

Merge common code between PowerPC and Microblaze
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Tested-by: NWolfram Sang <w.sang@pengutronix.de>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

we are follow powerpc change:
44ef3390Signed-off-by: NMichal Simek <monstr@monstr.eu>

Signed-off-by: NMichal Simek <monstr@monstr.eu>

PT_ macros are used by gdb and strace uses them too.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

We had wrong name in unistd.h + I wire up this syscall
in syscall table.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Patch a2e27255 should
contain change in unistd.h too. The same problem
had MIPS.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Currently all architectures but microblaze unconditionally define
USE_ELF_CORE_DUMP.  The microblaze omission seems like an error to me, so
let's kill this ifdef and make sure we are the same everywhere.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Acked-by: NHugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: <linux-arch@vger.kernel.org>
Cc: Michal Simek <michal.simek@petalogix.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Convert locks which cannot be sleeping locks in preempt-rt to
raw_spinlocks.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Acked-by: NPeter Zijlstra <peterz@infradead.org>
Acked-by: NIngo Molnar <mingo@elte.hu>

Generic rt_sigsuspend syscalls doesn't need any asm wrapper.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

The noMMU syscall trap has a bug that causes R11 to be zero on return to
userland. Remove the extra "save" of R11 responsible for the bug.

Remove reloading of mode indicator because r11 already contains it.
Signed-off-by: NSteven J. Magnani <steve@digidescorp.com>
Signed-off-by: NMichal Simek <monstr@monstr.eu>

show_tmem function do nothing that's why I removed it.
There is also cleaning of commented ancient code.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Microblaze version 7.20.d is the first MB version which can be run
on MMU linux. Please do not used previous version because they contain
HW bug.
Based on WB support was necessary to redesign whole cache design.
Microblaze versions from 7.20.a don't need to disable IRQ and cache
before working with them that's why there are special structures for it.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Microblaze v7.30.a will have 0x10 version string.
Signed-off-by: NMichal Simek <monstr@monstr.eu>