From: Wu Zhangjin <wuzhangjin@xxxxxxxxx> Changes from old revision: o Clear the errror information as suggesttion from Zhang Le. o Incorporated with the feedbacks from Ralf and used the options introduced from "Loongson: Add CPU_LOONGSON2F_WORKAROUNDS". As the "Fixups of Loongson2F" patch[1] to binutils have been applied into binutils 2.20.1. It's time to enable the options provided by the patch to compile the kernel. Without these fixups, the system will hang unexpectedly for the bug of processor. To learn more about 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] English Version of the above chapter 15 http://groups.google.com.hk/group/loongson-dev/msg/e0d2e220958f10a6?dmode=source Signed-off-by: Zhang Le <r0bertz@xxxxxxxxxx> Signed-off-by: Wu Zhangjin <wuzhangjin@xxxxxxxxx> --- arch/mips/Makefile | 13 +++++++++++++ 1 files changed, 13 insertions(+), 0 deletions(-) diff --git a/arch/mips/Makefile b/arch/mips/Makefile index 2f2eac2..0b9c01a 100644 --- a/arch/mips/Makefile +++ b/arch/mips/Makefile @@ -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 -- 1.7.0.1
