linux.git/arch/ppc/kernel, branch v2.6.20

Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

2006-12-12T02:24:58+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (36 commits)
  [POWERPC] Generic BUG for powerpc
  [PPC] Fix compile failure do to introduction of PHY_POLL
  [POWERPC] Only export __mtdcr/__mfdcr if CONFIG_PPC_DCR is set
  [POWERPC] Remove old dcr.S
  [POWERPC] Fix SPU coredump code for max_fdset removal
  [POWERPC] Fix irq routing on some 32-bit PowerMacs
  [POWERPC] ps3: Add vuart support
  [POWERPC] Support ibm,dynamic-reconfiguration-memory nodes
  [POWERPC] dont allow pSeries_probe to succeed without initialising MMU
  [POWERPC] micro optimise pSeries_probe
  [POWERPC] Add SPURR SPR to sysfs
  [POWERPC] Add DSCR SPR to sysfs
  [POWERPC] Fix 440SPe CPU table entry
  [POWERPC] Add support for FP emulation for the e300c2 core
  [POWERPC] of_device_register: propagate device_create_file return code
  [POWERPC] Fix mmap of PCI resource with hack for X
  [POWERPC] iSeries: head_64.o needs to depend on lparmap.s
  [POWERPC] cbe_thermal: Fix initialization of sysfs attribute_group
  [POWERPC] Remove QE header files from lite5200.c
  [POWERPC] of_platform_make_bus_id(): make `magic' int
  ...

[PATCH] use generic BUG for ppc

2006-12-08T16:28:39+00:00

Switch ppc over to using the generic BUG implementation.

Signed-off-by: Judith Lebzelter 
Cc: Jeremy Fitzhardinge 
Cc: Michael Ellerman 
Cc: Paul Mackerras 
Cc: Benjamin Herrenschmidt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[POWERPC] Fix mmap of PCI resource with hack for X

2006-12-08T06:21:06+00:00

The powerpc version of pci_resource_to_user() and associated hooks
used by /proc/bus/pci and /sys/bus/pci mmap have been broken for some
time on machines that don't have a 1:1 mapping of devices (basically
on non-PowerMacs) and have PCI devices above 32 bits.

This attempts to fix it as well as possible.

The rule is supposed to be that pci_resource_to_user() always converts
the resources back into a BAR values since that's what the /proc
interface was supposed to deal with. However, for X to work on
platforms where PCI MMIO is not mapped 1:1, it became a habit of
platforms like powerpc to pass "fixed up" values there since X expects
to be able to use values from /proc/bus/pci/devices as offsets to mmap
of /dev/mem...

So we keep that contraption here, causing also /sys/*/resource to
expose fully absolute MMIO addresses instead of BAR values, which is
ugly, but should still work as long as those are only used to calculate
alignment within a page.

X is still broken when built 32 bits on machines where PCI MMIO can be
above 32-bit space unfortunately.

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

[PATCH] relocatable kernel: Kallsyms generate relocatable symbols

2006-12-07T01:14:04+00:00

Print the addresses of non-absolute symbols relative to _text
so that ld will generate relocations.  Allowing a relocatable
kernel to relocate them.  We can't actually use the symbol names
because kallsyms includes static symbols that are not exported
from their object files.

Add the _text symbol definitions to the architectures which don't
define it otherwise linker will fail.

Signed-off-by: Eric W. Biederman 
Signed-off-by: Vivek Goyal 
Signed-off-by: Andi Kleen

[POWERPC] Distinguish POWER6 partition modes and tell userspace

2006-12-04T09:40:16+00:00

This adds code to look at the properties firmware puts in the device
tree to determine what compatibility mode the partition is in on
POWER6 machines, and set the ELF aux vector AT_HWCAP and AT_PLATFORM
entries appropriately.

Specifically, we look at the cpu-version property in the cpu node(s).
If that contains a "logical" PVR value (of the form 0x0f00000x), we
call identify_cpu again with this PVR value.  A value of 0x0f000001
indicates the partition is in POWER5+ compatibility mode, and a value
of 0x0f000002 indicates "POWER6 architected" mode, with various
extensions disabled.  We also look for various other properties:
ibm,dfp, ibm,purr and ibm,spurr.

Signed-off-by: Paul Mackerras

[POWERPC] Book-E reg MCSR msg misquoted

2006-12-04T09:39:22+00:00

PPC/booke reg MCSR value misquoted

Signed-off-by: nkalmala 
Cc: Benjamin Herrenschmidt 
Signed-off-by: Andrew Morton 
Acked-by: Kumar Gala 
Signed-off-by: Paul Mackerras

[POWERPC] Make alignment exception always check exception table

2006-11-01T04:16:04+00:00

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 
Signed-off-by: Paul Mackerras

[PATCH] vmlinux.lds: consolidate initcall sections

2006-10-27T22:34:51+00:00

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 
Signed-off-by: Andrew Morton 
[ Added AVR32 as well ]
Signed-off-by: Haavard Skinnemoen 
Signed-off-by: Linus Torvalds

[POWERPC] Support feature fixups in vdso's

2006-10-25T01:54:07+00:00

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 
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