linux.git/arch/powerpc, branch v2.6.30

powerpc/pmac: Update PowerMac 32-bit defconfig

2009-06-02T01:12:35+00:00

This mostly adds back AppleTouch support and adds CONFIG_HIGHMEM
by default.

Signed-off-by: Benjamin Herrenschmidt

powerpc: Fix up dma_alloc_coherent() on platforms without cache coherency.

2009-05-27T06:33:59+00:00

The implementation we just revived has issues, such as using a
Kconfig-defined virtual address area in kernel space that nothing
actually carves out (and thus will overlap whatever is there),
or having some dependencies on being self contained in a single
PTE page which adds unnecessary constraints on the kernel virtual
address space.

This fixes it by using more classic PTE accessors and automatically
locating the area for consistent memory, carving an appropriate hole
in the kernel virtual address space, leaving only the size of that
area as a Kconfig option. It also brings some dma-mask related fixes
from the ARM implementation which was almost identical initially but
grew its own fixes.

Signed-off-by: Benjamin Herrenschmidt

powerpc: Minor cleanups of kernel virt address space definitions

2009-05-27T06:32:50+00:00

Make FIXADDR_TOP a compile time constant and cleanup a
couple of definitions relative to the layout of the kernel
address space on ppc32. We also print out that layout at
boot time for debugging purposes.

This is a pre-requisite for properly fixing non-coherent
DMA allocactions.

Signed-off-by: Benjamin Herrenschmidt

powerpc: Move dma-noncoherent.c from arch/powerpc/lib to arch/powerpc/mm

2009-05-27T06:32:05+00:00

(pre-requisite to make the next patches more palatable)

Signed-off-by: Benjamin Herrenschmidt

Revert "powerpc: Rework dma-noncoherent to use generic vmalloc layer"

2009-05-27T03:33:14+00:00

This reverts commit 33f00dcedb0e22cdb156a23632814fc580fcfcf8.

    While it was a good idea to try to use the mm/vmalloc.c allocator instead
    of our own (in fact, ours is itself a dup on an old variant of the vmalloc
    one), unfortunately, the approach is terminally busted since
    dma_alloc_coherent() can be called at interrupt time or in atomic contexts
    and there's little chances we'll make the code in mm/vmalloc.c cope with\       that :-(

    Until we can get the generic code to forbid that idiocy and fix all
    drivers abusing it, we pretty much have no choice but revert to
    our custom virtual space allocator.

    There's also a problem with SMP safety since freeing such mapping
    would require an IPI which cannot be done at interrupt time.

    However, right now, I don't think we support any platform that is
    both SMP and has non-coherent DMA (don't laugh, I know such things
    do exist !) so we can sort that out later.

    Signed-off-by: Benjamin Herrenschmidt

powerpc/mm: Fix broken MMU PID stealing on !SMP

2009-05-26T03:46:49+00:00

The recent rework of the MMU PID handling for non-hash CPUs has a
subtle bug in the !SMP "optimized" variant of the PID stealing
function.  It clears the PID in the mm context before it calls
local_flush_tlb_mm(). However, the later will not flush anything
if the PID in the context is clear...

Signed-off-by: Hideo Saito 
Signed-off-by: Benjamin Herrenschmidt

powerpc/maple: Add a quirk to disable MSI for IPR on Bimini

2009-05-22T06:01:11+00:00

Something in the HW or FW setup is busted and MSIs aren't working with
IPR on Bimini, so until we figure out exaxtly what's up, we quirk them
out

Signed-off-by: Michael Ellerman 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Explicit alignment for .data.cacheline_aligned

2009-05-18T05:19:05+00:00

I don't think anything guarantees that the objects in data.page_aligned
are a multiple of PAGE_SIZE, thus the section may end on any boundary.

So the following section, .data.cacheline_aligned needs an explicit
alignment.

Signed-off-by: Benjamin Herrenschmidt

powerpc/ps3: Update ps3_defconfig

2009-05-18T05:19:05+00:00

Refresh and set these options:

 CONFIG_SYSFS_DEPRECATED_V2: y -> n
 CONFIG_INPUT_JOYSTICK:      y -> n
 CONFIG_HID_SONY:            n -> m
 CONFIG_RTC_DRV_PS3:         - -> m

Signed-off-by: Geoff Levand 
Signed-off-by: Benjamin Herrenschmidt

powerpc/ftrace: Fix constraint to be early clobber

2009-05-18T05:19:05+00:00

After upgrading my distcc boxes from gcc 4.2.2 to 4.4.0, the function
graph tracer broke. This was discovered on my x86 boxes.

The issue is that gcc used the same register for an output as it did for
an input in an asm statement. I first thought this was a bug in gcc and
reported it. I was notified that gcc was correct and that the output had
to be flagged as an "early clobber".

I noticed that powerpc had the same issue and this patch fixes it.

Signed-off-by: Steven Rostedt 
Signed-off-by: Benjamin Herrenschmidt