Messages in this thread |  | | | Date | Fri, 1 Oct 2010 07:40:49 -0400 | | Subject | Re: [PATCH 01/18] powerpc: Add ability to build little endian kernels | | From | Josh Boyer <> |
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On Fri, Oct 1, 2010 at 3:05 AM, Ian Munsie <imunsie@au1.ibm.com> wrote: > diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype > index d361f81..074ff12 100644 > --- a/arch/powerpc/platforms/Kconfig.cputype > +++ b/arch/powerpc/platforms/Kconfig.cputype > @@ -329,3 +329,19 @@ config CHECK_CACHE_COHERENCY > bool > > endmenu > + > +config ARCH_SUPPORTS_LITTLE_ENDIAN > + bool > + > +config CPU_LITTLE_ENDIAN > + bool "Build little endian kernel" > + depends on ARCH_SUPPORTS_LITTLE_ENDIAN && EXPERIMENTAL > + default n > + help > + This option selects whether a big endian or little endian kernel will > + be built. > + > + Note that if building a little endian kernel, CROSS_COMPILE must > + point to a toolchain capable of targetting little endian powerpc, > + while the toolchain specified by CROSS32_COMPILE must be capable of > + targetting *BIG* endian PowerPC.
Have you tested this support with a userspace containing floating point instructions? I wonder if CONFIG_MATH_EMULATION is going to need work at all, and if the boards with an actual FPU (440EP, 440EPx, 460EX, etc) would have issues.
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