Commit 8bbda428 authored Apr 10, 2010 by Wu Zhangjin Committed by Ralf Baechle Apr 30, 2010

MIPS: Loongson 2F: Enable fixups of the latest binutils

With the  "Fixups of Loongson2F" patch [1] having been applied to binutils
for binutils 2.20.1 we now can use it's time to enable the options provided
by the patch to compile the kernel.

Without these fixups, the system may hang if the erratum is triggered.

For more information on these fixups please refer to the following
references.

[1] "Fixups of Loongson2F" patch for binutils(actually for gas)
    http://sourceware.org/ml/binutils/2009-11/msg00387.html
[2] Chapter 15 of "Loongson2F User Manual"(Chinese Version)
    http://www.loongson.cn/uploadfile/file/200808211
[3] Chapter 15 of the English version Loongson 2F User Manual
    http://groups.google.com.hk/group/loongson-dev/msg/e0d2e220958f10a6?dmode=source



Signed-off-by: Zhang Le <r0bertz@gentoo.org>
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: Zhang Le <r0bertz@gentoo.org>
Cc: linux-mips <linux-mips@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/1106/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

parent 622844bf

arch/mips/Makefile

+13 −0

Original line number	Diff line number	Diff line
		@@ -136,6 +136,19 @@ cflags-$(CONFIG_CPU_LOONGSON2E) += \
		$(call cc-option,-march=loongson2e,-march=r4600)
		cflags-$(CONFIG_CPU_LOONGSON2F) += \
		$(call cc-option,-march=loongson2f,-march=r4600)
		# enable the workarounds for loongson2f
		ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS
		ifeq ($(call as-option,-Wa$(comma)-mfix-loongson2f-nop,),)
		$(error only binutils >= 2.20.2 have needed option -mfix-loongson2f-nop)
		else
		cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa$(comma)-mfix-loongson2f-nop
		endif
		ifeq ($(call as-option,-Wa$(comma)-mfix-loongson2f-jump,),)
		$(error only binutils >= 2.20.2 have needed option -mfix-loongson2f-jump)
		else
		cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa$(comma)-mfix-loongson2f-jump
		endif
		endif

		cflags-$(CONFIG_CPU_MIPS32_R1) += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
		-Wa,-mips32 -Wa,--trap

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