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Commit 4a5f79e7 authored by Russell King's avatar Russell King Committed by Russell King
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[ARM SMP] Add configuration option for ARMv6K processors 



The 'K' extension adds several new instructions to the ARMv6 ISA
which are primerily useful for SMP.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 06024f21

arch/arm/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -38,6 +38,7 @@ comma = , 
# macro, but instead defines a whole series of macros which makes

# testing for a specific architecture or later rather impossible.

arch-$(CONFIG_CPU_32v6)		:=-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6,-march=armv5t -Wa$(comma)-march=armv6)

arch-$(CONFIG_CPU_32v6K)	:=-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6k,-march=armv5t -Wa$(comma)-march=armv6k)

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

arch/arm/lib/bitops.h

+1 −1
Original line number Diff line number Diff line 
#include <linux/config.h>



#if __LINUX_ARM_ARCH__ >= 6 && defined(CONFIG_CPU_MPCORE)

#if __LINUX_ARM_ARCH__ >= 6 && defined(CONFIG_CPU_32v6K)

	.macro	bitop, instr

	mov	r2, #1

	and	r3, r0, #7		@ Get bit offset

arch/arm/mm/Kconfig

+12 −0
Original line number Diff line number Diff line
@@ -250,6 +250,18 @@ config CPU_V6 
	select CPU_COPY_V6

	select CPU_TLB_V6



# ARMv6k

config CPU_32v6K

	bool "Support ARM V6K processor extensions" if !SMP

	depends on CPU_V6

	default y if SMP

	help

	  Say Y here if your ARMv6 processor supports the 'K' extension.

	  This enables the kernel to use some instructions not present

	  on previous processors, and as such a kernel build with this

	  enabled will not boot on processors with do not support these

	  instructions.



# Figure out what processor architecture version we should be using.

# This defines the compiler instruction set which depends on the machine type.

config CPU_32v3