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| author | Wu Zhangjin <wuzhangjin@gmail.com> | 2009-07-02 23:27:41 +0800 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2009-09-17 20:07:47 +0200 |
| commit | 3702bba5eb4f7a0c89107089af6fd9bc2966b65a (patch) | |
| tree | ab2a7c8a0a88d7fb2ade98d42d24655370537640 | |
| parent | 3209e70e5ed1821be8d9b87fe9e8bd6cffa4b4c7 (diff) | |
| download | blackbird-op-linux-3702bba5eb4f7a0c89107089af6fd9bc2966b65a.tar.gz blackbird-op-linux-3702bba5eb4f7a0c89107089af6fd9bc2966b65a.zip | |
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: Zhang Le <r0bertz@gentoo.org>
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| -rw-r--r-- | arch/mips/Kconfig | 18 | ||||
| -rw-r--r-- | arch/mips/Makefile | 6 | ||||
| -rw-r--r-- | arch/mips/loongson/Kconfig | 2 |
3 files changed, 17 insertions, 9 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 482dcc3b91e1..466920aa067f 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -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 diff --git a/arch/mips/Makefile b/arch/mips/Makefile index 94d6f5813860..1efa9aa64880 100644 --- a/arch/mips/Makefile +++ b/arch/mips/Makefile @@ -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) \ diff --git a/arch/mips/loongson/Kconfig b/arch/mips/loongson/Kconfig index 376712a0e2f1..d45092505fa1 100644 --- a/arch/mips/loongson/Kconfig +++ b/arch/mips/loongson/Kconfig @@ -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 |
