linux-toradex.git/arch/powerpc/platforms, branch v2.6.19.2

[POWERPC] Fix ucc_geth of_device discovery on mpc832x

2006-11-22T02:28:21+00:00

mpc832x, as in mpc8360, needs to explicitly find and create the
platform device for ucc_geth in 2.6.19.  This code will likely be
readapted to Benh's new of_ methods for 2.6.20.

Signed-off-by: Kim Phillips 
Signed-off-by: Paul Mackerras

[POWERPC] Revert "[POWERPC] Enable generic rtc hook for the MPC8349 mITX"

2006-11-22T01:13:36+00:00

This reverts commit a8ed4f7ec3aa472134d7de6176f823b2667e450b.

As advised by David Brownell:

http://marc.theaimsgroup.com/?l=linux-kernel&m=116387226902131&w=2

Signed-off-by: Kim Phillips 
Signed-off-by: Paul Mackerras

[POWERPC] Fix cell "new style" mapping and add debug

2006-11-10T10:35:36+00:00

This fixes a typo in the "new style" code for mapping SPE resources,
which causes it to try to map the same resource 4 times.

It also adds some pr_debug's that are useful to track down issues with
the firmware when bringinh up new machines.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Paul Mackerras

[POWERPC] Use 4kB iommu pages even on 64kB-page systems

2006-11-01T03:52:48+00:00

The 10Gigabit ethernet device drivers appear to be able to chew
up all 256MB of TCE mappings on pSeries systems, as evidenced by
numerous error messages:

 iommu_alloc failed, tbl c0000000010d5c48 vaddr c0000000d875eff0 npages 1

Some experimentation indicates that this is essentially because
one 1500 byte ethernet MTU gets mapped as a 64K DMA region when
the large 64K pages are enabled. Thus, it doesn't take much to
exhaust all of the available DMA mappings for a high-speed card.

This patch changes the iommu allocator to work with its own
unique, distinct page size. Although the patch is long, its
actually quite simple: it just #defines a distinct IOMMU_PAGE_SIZE
and then uses this in all the places that matter.

As a side effect, it also dramatically improves network performance
on platforms with H-calls on iommu translation inserts/removes (since
we no longer call it 16 times for a 1500 bytes packet when the iommu HW
is still 4k).

In the future, we might want to make the IOMMU_PAGE_SIZE a variable
in the iommu_table instance, thus allowing support for different HW
page sizes in the iommu itself.

Signed-off-by: Linas Vepstas 
Signed-off-by: Benjamin Herrenschmidt 
Acked-by: Olof Johansson 
Acked-by: Stephen Rothwell 
Signed-off-by: Paul Mackerras

[POWERPC] Fix CHRP platforms with only 8259

2006-10-25T03:49:22+00:00

On CHRP platforms with only a 8259 controller, we should set the
default IRQ host to the 8259 driver's one for the IRQ probing
fallbacks to work in case the IRQ tree is incorrect (like on
Pegasos for example). Without this fix, we get a bunch of WARN_ON's
during boot.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Paul Mackerras

[POWERPC] spufs: fix another off-by-one bug in spufs_mbox_read

2006-10-25T02:10:41+00:00

Currently, spufs_mbox_read transfers more bytes than requested on a
read.  If you ask for four bytes, you get eight.  This fixes it to
transfer the largest multiple of four bytes that is less than or equal
to the number you asked for.

Note: one nasty property of this file in spufs is that you can only
read multiples of four bytes in the first place, since there is no way
to atomically put back a few bytes into the hardware register.  Thus,
reading less than four bytes returns -EINVAL.  Asking for more than
four returns the largest possible multiple of four.

Signed-off-by: Arnd Bergmann 
Signed-off-by: Paul Mackerras

[POWERPC] spufs: fix signal2 file to report signal2

2006-10-25T02:10:41+00:00

This fixes the /signal2 file to actually give signal2 data.

Signed-off-by: Dwayne Grant Mcconnell 
Signed-off-by: Arnd Bergmann 
Signed-off-by: Paul Mackerras

[POWERPC] Consolidate feature fixup code

2006-10-25T01:42:10+00:00

There are currently two versions of the functions for applying the
feature fixups, one for CPU features and one for firmware features. In
addition, they are both in assembly and with separate implementations
for 32 and 64 bits. identify_cpu() is also implemented in assembly and
separately for 32 and 64 bits.

This patch replaces them with a pair of C functions. The call sites are
slightly moved on ppc64 as well to be called from C instead of from
assembly, though it's a very small change, and thus shouldn't cause any
problem.

Signed-off-by: Benjamin Herrenschmidt 
Acked-by: Olof Johansson 
Signed-off-by: Paul Mackerras

[POWERPC] Fix build breakage with CONFIG_PPC32

2006-10-23T08:23:17+00:00

low_cpu_die is called from the CPU hotplug code on 32-bit powermacs,
but it is only defined if CONFIG_PM || CONFIG_CPU_FREQ_PMAC.  This
changes the ifdef so it is defined for CONFIG_HOTPLUG_CPU on 32-bit
machines.

Signed-off-by: Srinivasa DS 
Signed-off-by: Paul Mackerras

[POWERPC] Add Makefile entry for MPC832x_mds support

2006-10-16T05:53:30+00:00

Add missing entry in Makefile for MPC832x MDS support.  It
also change white space to tab in MPC8360 entry.

Signed-off-by: Li Yang 
Signed-off-by: Paul Mackerras