Commit graph

1478 commits

Author SHA1 Message Date
Paul Mackerras
3ccfc65c50 [PATCH] powerpc: Eliminate "exceeds stub group size" linker warning
It turns out that the linker warnings on 64-bit powerpc about "section
blah exceeds stub group size" were being triggered by conditional
branches in head_64.S branching to global symbols, whether in
head_64.S or in other files.  This eliminates the warnings by making
some global symbols in head_64.S no longer global, and by rearranging
some branches.

Signed-off-by: Paul Mackerras <paulus@samba.org>
[ Yee-haa. Maybe I'll notice newly introduced real warnings now - Linus ]
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-11-01 14:56:59 -08:00
Benjamin Herrenschmidt
4393c4f678 [POWERPC] Make alignment exception always check exception table
The alignment exception used to only check the exception table for
-EFAULT, not for other errors. That opens an oops window if we can
coerce the kernel into getting an alignment exception for other reasons
in what would normally be a user-protected accessor, which can be done
via some of the futex ops. This fixes it by always checking the
exception tables.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-11-01 15:16:04 +11:00
Gui,Jian
0d69a052d4 [POWERPC] Disallow kprobes on emulate_step and branch_taken
On powerpc, probing on emulate_step function will crash 2.6.18.1 when
it is triggered.

When kprobe is triggered, emulate_step() is on its kernel path and
will cause recursive kprobe fault.  And branch_taken() is called
in emulate_step().  This disallows kprobes on both of them.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-11-01 15:14:12 +11:00
Hugh Dickins
96268889ee [POWERPC] Make high hugepage areas preempt safe
Checking source for other get_paca()->field preemption dangers found that
open_high_hpage_areas does a structure copy into its paca while preemption
is enabled: unsafe however gcc accomplishes it.  Just remove that copy:
it's done safely afterwards by on_each_cpu, as in open_low_hpage_areas.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Acked-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-11-01 14:52:48 +11:00
Timur Tabi
302439d216 [POWERPC] qe_lib: qe_issue_cmd writes wrong value to CECDR
Changed qe_issue_cmd() to write cmd_input to the CECDR unmodified.  It
was treating cmd_input as a virtual address and tried to convert it to
a physical address.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-11-01 14:52:48 +11:00
Linas Vepstas
5d2efba64b [POWERPC] Use 4kB iommu pages even on 64kB-page systems
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 <linas@austin.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-11-01 14:52:48 +11:00
Andy Fleming
dd6c89f686 [POWERPC] Fix oprofile support for e500 in arch/powerpc
Fixed a compile error in building the 85xx support with oprofile, and in
the process cleaned up some issues with the fsl_booke performance monitor
code.

* Reorganized FSL Book-E performance monitoring code so that the 7450
  wouldn't be built if the e500 was, and cleaned it up so it was more
  self-contained.

* Added a cpu_setup function for FSL Book-E.  The original
  cpu_setup function prototype had no arguments, assuming that
  the reg_setup function would copy the required information into
  variables which represented the registers.  This was silly for
  e500, since it has 1 register per counter (rather than 3 for
  all counters), so the code has been restructured to have
  cpu_setup take the current counter config array as an argument,
  with op_powerpc_setup() invoking op_powerpc_cpu_setup() through
  on_each_cpu(), and op_powerpc_cpu_setup() invoking the
  model-specific cpu_setup function with an argument.  The
  argument is ignored on all other platforms at present.

* Fixed a confusing line where a trinary operator only had two
  arguments

Signed-off-by: Andrew Fleming <afleming@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-11-01 14:52:48 +11:00
Benjamin Herrenschmidt
441cbd8dac [POWERPC] Fix various offb issues
This patch fixes a few issues in offb:

 - A test was inverted causing the palette hack to never work
(no device node was passed down to the init function)

 - Some cards seem to have their assigned-addresses property in a random
order, thus we need to try using of_get_pci_address() first, which will
fail if it's not a PCI device, and fallback to of_get_address() in that
case. of_get_pci_address() properly parsees assigned-addresses to test
the BAR number and thus will get it right whatever the order is.

 - Some cards (like GXT4500) provide a linebytes of 0xffffffff in the
device-tree which does no good. This patch handles that by using the
screen width when that happens. (Also fixes btext.c while at it).

 - Add detection of the GXT4500 in addition to the GXT2000 for the
palette hacks (we use the same hack, palette is linear in register space
at offset 0x6000).

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-11-01 14:52:48 +11:00
Andrew Morton
61ce1efe6e [PATCH] vmlinux.lds: consolidate initcall sections
Add a vmlinux.lds.h helper macro for defining the eight-level initcall table,
teach all the architectures to use it.

This is a prerequisite for a patch which performs initcall synchronisation for
multithreaded-probing.

Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
[ Added AVR32 as well ]
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-27 15:34:51 -07:00
Olof Johansson
190a24f560 [POWERPC] Make sure __cpu_preinit_ppc970 gets called on 970GX processors
Add check for 970GX for __cpu_preinit_ppc970.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-26 09:20:07 +10:00
Benjamin Herrenschmidt
f4d4c354bc [POWERPC] Fix CHRP platforms with only 8259
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 <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-25 13:49:22 +10:00
Scott Wood
f49196a5f5 [POWERPC] IPIC: Fix spinlock recursion in set_irq_handler
This causes ipic_set_irq_type to set the handler directly rather
than call set_irq_handler, which causes spinlock recursion because
the lock is already held when ipic_set_irq_type is called.

I'm also not convinced that ipic_set_irq_type should be changing the
handler at all.  There seem to be several controllers that don't and
several that do.  Those that do would break what appears to be a common
usage of calling set_irq_chip_and_handler followed by set_irq_type, if a
non-standard handler were to be used.  OTOH, irq_create_of_mapping()
doesn't set the handler, but only calls set_irq_type().

This patch gets things working in the spinlock-debugging-enabled case,
but I'm curious as to where the handler setting is ideally supposed to be
done.  I don't see any documentation on set_irq_type() that clarifies
what the semantics are supposed to be.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-25 13:49:22 +10:00
Liu Dave-r63238
f84c39da76 [POWERPC] Fix the UCC rx/tx clock of QE
MPC8323EMDS board ethernet interface with RMII uses the CLK16 divisor
for the rx and tx clock, but the ucc_set_qe_mux_rxtx() function doesn't
handle the CLK16 setting of the CMXUCR3 and CMXUCR4 registers.  This
fixes it.

Signed-off-by: Dave Liu <daveliu@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-25 13:49:22 +10:00
Arnd Bergmann
b910ecf6bf [POWERPC] cell: update defconfig
===================================================================

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-25 12:10:41 +10:00
Arnd Bergmann
274cef5e9d [POWERPC] spufs: fix another off-by-one bug in spufs_mbox_read
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 <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-25 12:10:41 +10:00
Dwayne Grant Mcconnell
f6b301b89b [POWERPC] spufs: fix signal2 file to report signal2
This fixes the /signal2 file to actually give signal2 data.

Signed-off-by: Dwayne Grant Mcconnell <decimal@us.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-25 12:10:41 +10:00
Benjamin Herrenschmidt
e2100efb26 [POWERPC] Fix device_is_compatible() const warning
Fix a const'ification related warning with device_is_compatible()
and friends related to get_property() not properly having const
on it's input device node argument.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-25 11:54:24 +10:00
Benjamin Herrenschmidt
859deea949 [POWERPC] Cell timebase bug workaround
The Cell CPU timebase has an erratum. When reading the entire 64 bits
of the timebase with one mftb instruction, there is a handful of cycles
window during which one might read a value with the low order 32 bits
already reset to 0x00000000 but the high order bits not yet incremeted
by one. This fixes it by reading the timebase again until the low order
32 bits is no longer 0. That might introduce occasional latencies if
hitting mftb just at the wrong time, but no more than 70ns on a cell
blade, and that was considered acceptable.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-25 11:54:18 +10:00
Benjamin Herrenschmidt
21c4ff80cb [POWERPC] Support feature fixups in modules
This patch adds support for feature fixups in modules. This involves
adding support for R_PPC64_REL64 relocs to the 64 bits module loader.
It also modifies modpost.c to ignore the powerpc fixup sections (or it
would warn when used in .init.text).

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-25 11:54:13 +10:00
Benjamin Herrenschmidt
0909c8c2d5 [POWERPC] Support feature fixups in vdso's
This patch reworks the feature fixup mecanism so vdso's can be fixed up.
The main issue was that the construct:

        .long   label  (or .llong on 64 bits)

will not work in the case of a shared library like the vdso. It will
generate an empty placeholder in the fixup table along with a reloc,
which is not something we can deal with in the vdso.

The idea here (thanks Alan Modra !) is to instead use something like:

1:
        .long   label - 1b

That is, the feature fixup tables no longer contain addresses of bits of
code to patch, but offsets of such code from the fixup table entry
itself. That is properly resolved by ld when building the .so's. I've
modified the fixup mecanism generically to use that method for the rest
of the kernel as well.

Another trick is that the 32 bits vDSO included in the 64 bits kernel
need to have a table in the 64 bits format. However, gas does not
support 32 bits code with a statement of the form:

        .llong  label - 1b  (Or even just .llong label)

That is, it cannot emit the right fixup/relocation for the linker to use
to assign a 32 bits address to an .llong field. Thus, in the specific
case of the 32 bits vdso built as part of the 64 bits kernel, we are
using a modified macro that generates:

        .long   0xffffffff
        .llong  label - 1b

Note that is assumes that the value is negative which is enforced by
the .lds (those offsets are always negative as the .text is always
before the fixup table and gas doesn't support emiting the reloc the
other way around).

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-25 11:54:07 +10:00
Benjamin Herrenschmidt
42c4aaadb7 [POWERPC] Consolidate feature fixup code
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 <benh@kernel.crashing.org>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-25 11:42:10 +10:00
Timur Tabi
aa7a32cbda [POWERPC] Fix spelling errors in ucc_fast.c and ucc_slow.c
In ucc_fast.c and ucc_slow.c, "illegal" is twice spelled "illagal".

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-23 18:23:17 +10:00
Mark A. Greer
3688a0f484 [POWERPC] Don't require execute perms on wrapper when building zImage.initrd
Don't require that the wrapper script be executable when building
zImage.initrds.  This has already been fixed for zImages.

Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-23 18:23:17 +10:00
Jake Moilanen
362ff7b2ac [POWERPC] Add 970GX cputable entry
970GX cputable entry from Steve Winiecki.

Signed-off-by: Jake Moilanen <moilanen@austin.ibm.com>

 arch/powerpc/kernel/cputable.c          |   15 +++++++++++++++
 arch/powerpc/oprofile/op_model_power4.c |    2 +-
 include/asm-powerpc/reg.h               |    1 +
 3 files changed, 17 insertions(+), 1 deletion(-)
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-23 18:23:17 +10:00
Srinivasa Ds
7f8c4c50bd [POWERPC] Fix build breakage with CONFIG_PPC32
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 <srinivasa@in.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-23 18:23:17 +10:00
Zang Roy-r61911
c3386e4014 [POWERPC] Fix compiler warning message on get_property call
This fixes the warning message from the return value of function
get_property(), by making sure that the variable that receives the
value is marked as const.

Signed-off-by: Roy Zang	<tie-fei.zang@freescale.com>

--
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-23 18:20:12 +10:00
Stephen Rothwell
cbcdb93d44 [POWERPC] Simplify stolen time calculation
In calculating stolen time, we were trying to actually account for time
spent in the hypervisor.  We don't really have enough information to do
that accurately, so don't try.  Instead, we now calculate stolen time as
time that the current cpu thread is not actually dispatching instructions.
On chips without a PURR, we cannot do this, so stolen time will always
be zero.  On chips with a PURR, this is merely the difference between
the elapsed PURR values and the elapsed TB values.

This gives us much more sane vaules from tools such as mpstat, even if
they are still a bit strange e.g. 2 busy threads on one cpu will both
appear to have 50% user time and 50% stolen time while 1 busy thread on
a cpu will look like 100% user on one of them and 100% idle on the other.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-23 18:20:12 +10:00
Andy Whitcroft
7516795739 [PATCH] Reintroduce NODES_SPAN_OTHER_NODES for powerpc
Reintroduce NODES_SPAN_OTHER_NODES for powerpc

Revert "[PATCH] Remove SPAN_OTHER_NODES config definition"
    This reverts commit f62859bb68.
Revert "[PATCH] mm: remove arch independent NODES_SPAN_OTHER_NODES"
    This reverts commit a94b3ab7ea.

Also update the comments to indicate that this is still required
and where its used.

Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Kravetz <kravetz@us.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Acked-by: Will Schmidt <will_schmidt@vnet.ibm.com>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-21 13:35:06 -07:00
Anton Blanchard
284a940675 [POWERPC] Check for offline nodes in pci NUMA code
During boot we bring up all memory and cpu nodes. Normally a PCI device
will be in one of these online nodes, however in some weird setups it
may not.

We have only seen this in the lab but we may as well check for the case
and fallback to -1 (all nodes).

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-16 15:53:30 +10:00
Anton Blanchard
00ae36de49 [POWERPC] Better check in show_instructions
Instead of just checking that an address is in the right range, use the
provided __kernel_text_address() helper which covers both the kernel and
module text sections.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-16 15:53:30 +10:00
Anton Blanchard
99f4861025 [POWERPC] POWER6 has 6 PMCs
Change ->num_pmcs to match the number of PMCs in POWER6.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-16 15:53:30 +10:00
Anton Blanchard
6c4841c2b6 [POWERPC] Never panic when taking altivec exceptions from userspace
At the moment we rely on a cpu feature bit or a firmware property to
detect altivec. If we dont have either of these and the cpu does in fact
support altivec we can cause a panic from userspace.

It seems safer to always send a signal if we manage to get an 0xf20
exception from userspace.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-16 15:53:30 +10:00
Randy Vinson
60b2a46cd6 [POWERPC] Fix IO Window Updates on P2P bridges.
When update_bridge_base() updates the IO window on a PCI-to-PCI
bridge, it fails to zero the upper 16 bits of the base and limit
registers if the window size is less than 64K.  This fixes it.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-16 15:53:30 +10:00
Li Yang
8ba738c2bb [POWERPC] Add Makefile entry for MPC832x_mds support
Add missing entry in Makefile for MPC832x MDS support.  It
also change white space to tab in MPC8360 entry.

Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-16 15:53:30 +10:00
Li Yang
f5a37b0661 [POWERPC] Fix MPC8360EMDS PB board support
MPC8360EMDS PB support is broken as some code was missing
in last submission.  This patch adds missing code and makes
MPC8360EMDS PB support working.

Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-16 15:53:30 +10:00
Timur Tabi
ee4ea82c07 [POWERPC] Add DOS partition table support to mpc834x_itx_defconfig
The default configuration file for the MPC8349E-mITX reference board,
mpc834x_itx_defconfig, did not include support for DOS partition table types.
This support is necessary because the hard drive that comes with the ITX
is formatted with this partition table type.  Without this config option,
no partitions on the drive can be mounted.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-16 15:52:14 +10:00
Noguchi, Masato
654e4aee49 [POWERPC] spufs: fix support for read/write on cntl
This fixes a memory leak introduced by "spufs: add support
for read/write oncntl", which was missing a call to simple_attr_close.

Signed-off-by: Masato Noguchi <Masato.Noguchi@jp.sony.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-16 15:52:14 +10:00
Benjamin Herrenschmidt
e5267b4b37 [POWERPC] Don't crash on cell with 2 BEs when !CONFIG_NUMA
The SPU code will crash if CONFIG_NUMA is not set and SPUs are found on
a non-0 node. This workaround will ignore those SPEs and just print an
message in the kernel log.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-16 15:52:14 +10:00
Mel Gorman
6391af174a [PATCH] mm: use symbolic names instead of indices for zone initialisation
Arch-independent zone-sizing is using indices instead of symbolic names to
offset within an array related to zones (max_zone_pfns).  The unintended
impact is that ZONE_DMA and ZONE_NORMAL is initialised on powerpc instead
of ZONE_DMA and ZONE_HIGHMEM when CONFIG_HIGHMEM is set.  As a result, the
the machine fails to boot but will boot with CONFIG_HIGHMEM turned off.

The following patch properly initialises the max_zone_pfns[] array and uses
symbolic names instead of indices in each architecture using
arch-independent zone-sizing.  Two users have successfully booted their
powerpcs with it (one an ibook G4).  It has also been boot tested on x86,
x86_64, ppc64 and ia64.  Please merge for 2.6.19-rc2.

Credit to Benjamin Herrenschmidt for identifying the bug and rolling the
first fix.  Additional credit to Johannes Berg and Andreas Schwab for
reporting the problem and testing on powerpc.

Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-11 11:14:14 -07:00
Linus Torvalds
3c693024cf Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  [POWERPC] Fix windfarm platform device usage
  [POWERPC] Fix i2c-powermac platform device usage
  [POWERPC] Fix secondary CPU startup on old "powersurge" SMP powermacs
  [POWERPC] ARCH=ppc pt_regs fixes
  [POWERPC] Update maple defconfig
  [POWERPC] Fix Maple secondary IDE interrupt
  [POWERPC] Make U4 PCIe work on maple
  [POWERPC] cell: fix default zImage build target
  [POWERPC] Fix boot wrapper invocation if CROSS_COMPILE contains spaces
  [POWERPC] Fix xmon IRQ handler for pt_regs removal
2006-10-10 16:16:33 -07:00
Paul Mackerras
d6a29252ad [POWERPC] Fix secondary CPU startup on old "powersurge" SMP powermacs
On the old "powersurge" SMP powermacs, the second CPU is started up
by sending it an IPI, which has the side effect of stopping the
timebase clock (so the secondary CPU's timebase can be synchronized
with the primary's).  The routine that did this used udelay, which
will hang forever when the timebase is stopped, since udelay now spins
until the timebase reaches a certain value.

The end result is that the kernel would hang when bringing up the
second CPU.  This fixes it by using a simple loop which just does a
fixed number of iterations to generate the delay.  These old systems
were all clocked at around 200 MHz or so, so a fixed number of
iterations is acceptable.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-10 13:51:00 +10:00
Benjamin Herrenschmidt
8de242e60a [POWERPC] Update maple defconfig
This updates the Maple defconfig to 4 CPUs (along with current defaults)
to support the "tigerwood" 970MP evaluation board.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-10 11:54:26 +10:00
Benjamin Herrenschmidt
1e1b20a119 [POWERPC] Fix Maple secondary IDE interrupt
The IDE driver will pick up the PCI IRQ for both channels on Maple
despite the fact that it's in legacy mode. This works around it by
"hiding" the PCI IRQ of the AMD8111 IDE controller when it's configured
in legacy mode on the Maple platform, thus causing the driver to call
pci_get_legacy_ide_irq() which will return the correct interrupts for
both channels.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-10 11:54:26 +10:00
Benjamin Herrenschmidt
c10af8c38d [POWERPC] Make U4 PCIe work on maple
The Maple support code was missing code for U4/CPC945 PCIe. This adds
it, enabling it to work on tigerwood boards, and possibly also js21
using SLOF. Also disable an obsolete firmware workaround.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-10 11:54:26 +10:00
Geoff Levand
020533ef24 [POWERPC] cell: fix default zImage build target
Change CONFIG_PPC_CELL to CONFIG_PPC_IBM_CELL_BLADE in the powerpc boot
makefile.

CONFIG_PPC_CELL is used to build the generic cell processor support, and
is not an indication of platform.

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-10 11:54:26 +10:00
Michael Ellerman
dcf9065122 [POWERPC] Fix boot wrapper invocation if CROSS_COMPILE contains spaces
My CROSS_COMPILE is "ccache /opt/compilers/blah", which confuses
the boot wrapper script. Quote CROSS_COMPILE and CROSS32_COMPILE
so they can safely contain spaces.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-10 11:54:26 +10:00
Paul Mackerras
f583ffce1a [POWERPC] Fix xmon IRQ handler for pt_regs removal
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-10 11:47:07 +10:00
Dave Jones
b0ac3f50b8 [HEADERS] Put linux/config.h out of its misery.
Signed-off-by: Dave Jones <davej@redhat.com>
2006-10-09 19:13:51 -04:00
Linus Torvalds
9b6d99f48d Merge git://git.infradead.org/~dhowells/irq-2.6
* git://git.infradead.org/~dhowells/irq-2.6:
  IRQ: Use the new typedef for interrupt handler function pointers
2006-10-09 14:29:26 -07:00
Al Viro
7c84ace9bc [PATCH] trivial iomem annotations (arch/powerpc/platfroms/parsemi/pci.c)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-09 14:19:08 -07:00