Commit 3702bba5 authored by Wu Zhangjin's avatar Wu Zhangjin Committed by Ralf Baechle
Browse files

MIPS: Loongson: Add GCC 4.4 support for Loongson2E 



Because only gcc >=4.4 have loongson-specific support, we need to choose
the suitable -march argument for gcc <= 4.3 and gcc >= 4.4, and here, we
use -march=loongson2e for loongson2e.

Thanks goes to Arnaud Patard <apatard@mandriva.com> for suggestion of
using cc-options(Documentation/kbuild/makefiles.txt). and thanks Zhang
Le for introducing the new CPU_LOONGSON2E kernel option.

NOTE: -mtune option is not need if -march and -mtune use the same value.

Signed-off-by: default avatarZhang Le <r0bertz@gentoo.org>
Signed-off-by: default avatarWu Zhangjin <wuzhangjin@gmail.com>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 3209e70e

arch/mips/Kconfig

+11 −7
Original line number Diff line number Diff line
@@ -1030,12 +1030,10 @@ choice 
	prompt "CPU type"

	default CPU_R4X00



config CPU_LOONGSON2

	bool "Loongson 2"

	depends on SYS_HAS_CPU_LOONGSON2

	select CPU_SUPPORTS_32BIT_KERNEL

	select CPU_SUPPORTS_64BIT_KERNEL

	select CPU_SUPPORTS_HIGHMEM

config CPU_LOONGSON2E

	bool "Loongson 2E"

	depends on SYS_HAS_CPU_LOONGSON2E

	select CPU_LOONGSON2

	help

	  The Loongson 2E processor implements the MIPS III instruction set

	  with many extensions.
@@ -1282,7 +1280,13 @@ config CPU_CAVIUM_OCTEON 


endchoice



config SYS_HAS_CPU_LOONGSON2

config CPU_LOONGSON2

	bool

	select CPU_SUPPORTS_32BIT_KERNEL

	select CPU_SUPPORTS_64BIT_KERNEL

	select CPU_SUPPORTS_HIGHMEM



config SYS_HAS_CPU_LOONGSON2E

	bool



config SYS_HAS_CPU_MIPS32_R1

arch/mips/Makefile

+5 −1
Original line number Diff line number Diff line
@@ -120,7 +120,11 @@ cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap 
cflags-$(CONFIG_CPU_VR41XX)	+= -march=r4100 -Wa,--trap

cflags-$(CONFIG_CPU_R4X00)	+= -march=r4600 -Wa,--trap

cflags-$(CONFIG_CPU_TX49XX)	+= -march=r4600 -Wa,--trap

cflags-$(CONFIG_CPU_LOONGSON2)	+= -march=r4600 -Wa,--trap

# only gcc >= 4.4 have the loongson-specific support

cflags-$(CONFIG_CPU_LOONGSON2)	+= -Wa,--trap

cflags-$(CONFIG_CPU_LOONGSON2E) += \

	$(call cc-option,-march=loongson2e,-march=r4600)



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

			-Wa,-mips32 -Wa,--trap

cflags-$(CONFIG_CPU_MIPS32_R2)	+= $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \

arch/mips/loongson/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -7,7 +7,7 @@ config LEMOTE_FULOONG2E 
    select ARCH_SPARSEMEM_ENABLE

    select CEVT_R4K

    select CSRC_R4K

    select SYS_HAS_CPU_LOONGSON2

    select SYS_HAS_CPU_LOONGSON2E

    select DMA_NONCOHERENT

    select BOOT_ELF32

    select BOARD_SCACHE

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