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authorScott Wood <scottwood@freescale.com>2007-09-18 15:29:35 -0500
committerKumar Gala <galak@kernel.crashing.org>2007-10-04 11:02:54 -0500
commit5dd57a1308a7e40e04fb6ecbff170df7a0b92cd8 (patch)
tree7766bea806c977c47624e43c1c21a2a11ff1782d /arch/powerpc/Kconfig
parentc4e05bc57dd14294683cdea7fe36ce3c01f5c6ae (diff)
[POWERPC] 8xx: Move softemu8xx.c from arch/ppc
Previously, Soft_emulate_8xx was called with no implementation, resulting in build failures whenever building 8xx without math emulation. The implementation is copied from arch/ppc to resolve this issue. However, this sort of minimal emulation is not a very good idea other than for compatibility with existing userspaces, as it's less efficient than soft-float and can mislead users into believing they have soft-float. Thus, it is made a configurable option, off by default. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/Kconfig')
-rw-r--r--arch/powerpc/Kconfig11
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 6f5155d8c324..31804575dd5e 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -198,6 +198,17 @@ config MATH_EMULATION
unit, which will allow programs that use floating-point
instructions to run.
+config 8XX_MINIMAL_FPEMU
+ bool "Minimal math emulation for 8xx"
+ depends on 8xx && !MATH_EMULATION
+ help
+ Older arch/ppc kernels still emulated a few floating point
+ instructions such as load and store, even when full math
+ emulation is disabled. Say "Y" here if you want to preserve
+ this behavior.
+
+ It is recommended that you build a soft-float userspace instead.
+
config IOMMU_VMERGE
bool "Enable IOMMU virtual merging"
depends on PPC64