litmus-rt.git/arch/powerpc/Makefile, branch v2.6.26-rc8

[POWERPC] Fix -Os kernel builds with newer gcc versions

2008-06-16T05:00:54+00:00

GCC 4.4.x looks to be adding support for generating out-of-line register
saves/restores based on:

http://gcc.gnu.org/ml/gcc-patches/2008-04/msg01678.html

This breaks the kernel if we enable CONFIG_CC_OPTIMIZE_FOR_SIZE.  To fix
this we add the use the save/restore code from gcc and simplified it down
for our needs (integer only).

Additionally, we have to link this code into each module.  The other
solution was to add EXPORT_SYMBOL() which meant going through the
trampoline which seemed nonsensical for these out-of-line routines.

Finally, we add some checks to prom_init_check.sh to ignore the
out-of-line save/restore functions.

Signed-off-by: Kumar Gala 
Signed-off-by: Paul Mackerras

[POWERPC] bootwrapper: add simpleImage* to list of boot targets

2008-06-11T11:42:34+00:00

Without simpleImage% in the BOOT_TARGETS list, it is impossible to
build any of the simpleImages.

Signed-off-by: Grant Likely 
Signed-off-by: Josh Boyer

KVM: ppc: PowerPC 440 KVM implementation

2008-04-27T15:21:39+00:00

This functionality is definitely experimental, but is capable of running
unmodified PowerPC 440 Linux kernels as guests on a PowerPC 440 host. (Only
tested with 440EP "Bamboo" guests so far, but with appropriate userspace
support other SoC/board combinations should work.)

See Documentation/powerpc/kvm_440.txt for technical details.

[stephen: build fix]

Signed-off-by: Hollis Blanchard 
Acked-by: Paul Mackerras 
Signed-off-by: Stephen Rothwell 
Signed-off-by: Avi Kivity

[POWERPC] Provide access to arch/powerpc include path on ppc64

2008-04-16T21:46:12+00:00

There does not appear to be any reason that we shouldn't just have
-Iarch/$(ARCH) on both ppc32 and ppc64 builds.

Signed-off-by: Kumar Gala 
Signed-off-by: Paul Mackerras

[POWERPC] add target for building .dtb files

2008-04-03T01:29:11+00:00

Call dtc from the Makefile instead of the wrapper script so that the dt
blobs can be generated with a simple make invocation.

Using this patch allows board ports to trigger automatic building of .dtb
files by adding them to the image-y target list.

Signed-off-by: Grant Likely 
Signed-off-by: Josh Boyer

[POWERPC] Fix zImage-dtb.initrd build error

2008-03-12T23:09:26+00:00

The pattern substitution rules were failing when used with zImage-dtb
targets.  If zImage-dtb.initrd was selected, the pattern substitution
would generate "zImage.initrd-dtb" instead of "zImage-dtb.initrd" which
caused the build to fail.

This renames zImage-dtb to dtbImage to avoid the problem entirely.
By not using the zImage prefix then is no potential for namespace
collisions.

Signed-off-by: Grant Likely 
Acked-by: Geoff Levand 
Signed-off-by: Paul Mackerras

x86: fix vdso_install breaks user "make install"

2008-02-19T15:18:34+00:00

I suggest to make the vdso_install step independent as
in following patch.

This solves the issue at ahnd and still gives us the posibility
to install the files should they be needed.

Signed-off-by: Sam Ravnborg 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

[POWERPC] bootwrapper: Build multiple cuImages

2008-02-07T00:40:19+00:00

Currently, the kernel uses CONFIG_DEVICE_TREE to wrap a kernel image
with a fdt blob which means for any given configuration only one dts
file can be selected and so support for only one board can be built

This moves the selection of the default .dts file out of the kernel
config and into the bootwrapper makefile.  The makefile chooses which
images to build based on the kernel config and the dts source file
name is taken directly from the image name.  For example "cuImage.ebony"
will use "ebony.dts" as the device tree source file.

In addition, this patch allows a specific image to be requested from the
command line by adding "cuImage.%" and "treeImage.%" targets to the list
of valid built targets in arch/powerpc/Makefile.  This allows the default
dts selection to be overridden.

Another advantage to this change is it allows a single defconfig to be
supplied for all boards using the same chip family and only differing in
the device tree.

Important note: This patch adds two new zImage targets; zImage.dtb.% and
zImage.dtb.initrd.% for zImages with embedded dtb files.  Currently
there are 5 platforms which require this: ps3, ep405, mpc885ads, ep88xc,
adder875-redboot and ep8248e.  This patch *changes the zImage filenames*
for those platforms.  ie. 'zImage.ps3' is now 'zImage.dtb.ps3'.

This new zImage.dtb targets were added so that the .dts file could be
part of the dependancies list for building them.

Signed-off-by: Grant Likely 
Signed-off-by: Paul Mackerras

[POWERPC] Implement 'make bootwrapper_install'

2007-12-06T03:44:30+00:00

This adds a 'bootwrapper_install' make target for the powerpc
architecture, which installs the wrapper script, intermediate object
files and device-tree sources for later use.

This will then allow bootable zImages to be created other than in the
context of a kernel build.

Signed-off-by: David Woodhouse 
Signed-off-by: Paul Mackerras

[POWERPC] Add -mno-spe for ARCH=powerpc builds

2007-11-09T09:47:29+00:00

Newer GCC's are capable of autovectorization for ISA extensions like
AltiVec and SPE.  If we happen to build with one of those compilers we
will get SPE instructions in random kernel code.  Today we only allow
basic interger code in the kernel and FP, AltiVec, or SPE in special
explicit locations that have handled the proper saving and restoring of
the register state (since on uniprocessor we lazy context switch the
register state for FP, AltiVec, and SPE).

-mno-spe disables the compiler for automatically generating SPE
instructions without our knowledge.

Signed-off-by: Kumar Gala