On 21:11 Wed 07 Apr , Wu Zhangjin wrote: > From: Wu Zhangjin <wuzhangjin@xxxxxxxxx> > > Changes from old revision: > > 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..14f12bc 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,),) > + $(error gcc does not support needed option -mfix-loongson2f-nop) Again, this is an as option. :) So this error msg is a little miss leading. Maybe we should tell user at least which version of binutils is needed. > + else > + cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa$(comma)-mfix-loongson2f-nop > + endif > + ifeq ($(call as-option,-Wa$(comma)-mfix-loongson2f-jump,),) > + $(error gcc does not support needed option -mfix-loongson2f-jump) Same here. Zhang, Le > + else > + cflags-$(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 >
