diff options
Diffstat (limited to 'arch/mips/loongson2ef/Platform')
| -rw-r--r-- | arch/mips/loongson2ef/Platform | 38 |
1 files changed, 2 insertions, 36 deletions
diff --git a/arch/mips/loongson2ef/Platform b/arch/mips/loongson2ef/Platform index 50e659aca543..d446b705fba4 100644 --- a/arch/mips/loongson2ef/Platform +++ b/arch/mips/loongson2ef/Platform @@ -2,45 +2,11 @@ # Loongson Processors' Support # -cflags-$(CONFIG_CPU_LOONGSON2EF) += -Wa,--trap -cflags-$(CONFIG_CPU_LOONGSON2E) += -march=loongson2e -cflags-$(CONFIG_CPU_LOONGSON2F) += -march=loongson2f -# -# Some versions of binutils, not currently mainline as of 2019/02/04, support -# an -mfix-loongson3-llsc flag which emits a sync prior to each ll instruction -# to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h for a -# description). -# -# We disable this in order to prevent the assembler meddling with the -# instruction that labels refer to, ie. if we label an ll instruction: -# -# 1: ll v0, 0(a0) -# -# ...then with the assembler fix applied the label may actually point at a sync -# instruction inserted by the assembler, and if we were using the label in an -# exception table the table would no longer contain the address of the ll -# instruction. -# -# Avoid this by explicitly disabling that assembler behaviour. If upstream -# binutils does not merge support for the flag then we can revisit & remove -# this later - for now it ensures vendor toolchains don't cause problems. -# -cflags-$(CONFIG_CPU_LOONGSON2EF) += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,) - -# Enable the workarounds for Loongson2f -ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS -cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa,-mfix-loongson2f-nop -cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa,-mfix-loongson2f-jump -endif - -# Some -march= flags enable MMI instructions, and GCC complains about that -# support being enabled alongside -msoft-float. Thus explicitly disable MMI. -cflags-y += $(call cc-option,-mno-loongson-mmi) - # # Loongson Machines' Support # -cflags-$(CONFIG_MACH_LOONGSON2EF) += -I$(srctree)/arch/mips/include/asm/mach-loongson2ef -mno-branch-likely +cflags-$(CONFIG_MACH_LOONGSON2EF) += -I$(srctree)/arch/mips/include/asm/mach-loongson2ef +cflags-$(CONFIG_CC_HAS_MNO_BRANCH_LIKELY) += -mno-branch-likely load-$(CONFIG_LEMOTE_FULOONG2E) += 0xffffffff80100000 load-$(CONFIG_LEMOTE_MACH2F) += 0xffffffff80200000 |