linux.git/arch/microblaze/kernel/setup.c, branch v2.6.35-rc4

microblaze: Print early printk information to log buffer

2010-04-01T06:38:25+00:00

If early printk console is not enabled then all messages
are written to log buffer.

Signed-off-by: Michal Simek

microblaze: Move cache function to cache.c

2010-03-11T13:07:57+00:00

It is better to have init cache handling on one place.

Signed-off-by: Michal Simek

microblaze: Add support for Xilinx PCI host bridge

2010-03-11T13:05:18+00:00

This patch is based on powerpc patch
64f16502475ddf663169369fffff6da9b10ea9fb

We did some cleanups and removed powerpc parts.
There is one new debug early listing function too.

Exclude function is only in Debug options.

We tested in on custom board.

Signed-off-by: Michal Simek

microblaze: Support DMA

2010-03-11T12:56:29+00:00

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: Michal Simek

microblaze: Invalidate dcache before enabling it

2010-02-08T10:39:18+00:00

We found that on write-trough kernel is necessary to do that invalidation.
One WB is possible to use invalidation too.

Signed-off-by: Michal Simek

microblaze: Support for WB cache

2009-12-14T07:45:10+00:00

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: Michal Simek

microblaze: Remove panic_timeout init value

2009-12-14T07:45:09+00:00

panic_timeout is in BSS section and it is cleared with BSS section.
This means that value is setup to 0.

Signed-off-by: Michal Simek

microblaze: Lockdep support

2009-12-14T07:40:09+00:00

Microblaze needs to do lock_init very soon because MMU init calls lock functions.

Here is the explanation from Peter Zijlstra why we have to enable
__ARCH_WANTS_INTERRUPTS_ON_CTSW.

"So we schedule while holding rq->lock (for obvious reasons), but since
lockdep tracks held locks per tasks, we need to transfer the held state
from the prev to the next task. We do this by explicity calling
spin_release(&rq->lock) in context_switch() right before switch_to(),
and calling spin_acquire(&rq->lock) in
finish_task_switch()->finish_lock_switch().

Now, for some reason lockdep thinks that interrupts got enabled over the
context switch (git grep __ARCH_WANTS_INTERRUPTS_ON_CTSW arch/microblaze
doesn't seem to turn up anything).

Clearly trying to acquire the rq->lock with interrupts enabled is a bad
idea and lockdep warns you about this."

Signed-off-by: Michal Simek

microblaze: GPIO reset support

2009-12-14T07:40:08+00:00

Signed-off-by: Michal Simek

microblaze: Add checking mechanism for MSR instruction

2009-09-21T12:29:21+00:00

It was necessary to use fourth parameter(r8) in early_printk
to show messages on console.

Signed-off-by: Michal Simek