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--- linux-2.6.11/arch/arm/Makefile.orig 2005-03-20 15:02:07.587138712 -0800
+++ linux-2.6.11/arch/arm/Makefile 2005-03-20 15:10:36.546765088 -0800
@@ -33,6 +33,12 @@
AFLAGS += -mlittle-endian
endif
+ifeq ($(CONFIG_ARM_THUMB_INTERWORK),y)
+CFLAGS += -mthumb-interwork
+else
+CFLAGS += -mno-thumb-interwork
+endif
+
comma = ,
# This selects which instruction set is used.
@@ -43,6 +49,8 @@
arch-$(CONFIG_CPU_32v5) :=-D__LINUX_ARM_ARCH__=5 $(call cc-option,-march=armv5te,-march=armv4)
arch-$(CONFIG_CPU_32v4) :=-D__LINUX_ARM_ARCH__=4 -march=armv4
arch-$(CONFIG_CPU_32v3) :=-D__LINUX_ARM_ARCH__=3 -march=armv3
+# The following overrides the CPU_32v5 setting if specified
+arch-$(CONFIG_ARCH_XSCALE) :=-D__LINUX_ARM_ARCH__=5 $(call cc-option,-march=xscale,-march=armv5te)
# This selects how we optimise for the processor.
tune-$(CONFIG_CPU_ARM610) :=-mtune=arm610
--- linux-2.6.11/arch/arm/mm/Kconfig.orig 2005-03-20 14:54:07.927058128 -0800
+++ linux-2.6.11/arch/arm/mm/Kconfig 2005-03-20 15:01:26.727350344 -0800
@@ -366,6 +366,31 @@
If you don't know what this all is, saying Y is a safe choice.
+config ARM_THUMB_INTERWORK
+ bool "Support Thumb code within the kernel"
+ depends on CPU_ARM720T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM1020 || CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || CPU_XSCALE || CPU_V6
+ default n
+ help
+ Say Y to compile the whole kernel with support for the interworking
+ of the 16 bit thumb instruction set and 32 bit ARM instruction set.
+
+ You only need this if some parts of the kernel will be compiled
+ as thumb code, this is not usual. It increases the total kernel
+ size by about 3%.
+
+config ARCH_XSCALE
+ bool "Use -march=xscale in preference to -march=armv5te"
+ depends on CPU_XSCALE
+ default y
+ help
+ Say yes to ask gcc to use the xscale architecture (instruction set)
+ in preference to armv5te. This allows gcc to use the extra xscale
+ instructions but means the code will not run on a standard (non-xscale)
+ armv5te. At present this makes no difference - gcc 3.4.3 does not
+ generate any xscale specific instructions - however gcc 3.4.3 does
+ generate slightly more optimal instructions if this is specified (this
+ is an error inside gcc 3.4.3 which should be fixed in 4.1.)
+
config CPU_BIG_ENDIAN
bool "Build big-endian kernel"
depends on ARCH_SUPPORTS_BIG_ENDIAN
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