diff options
| author | Steven J. Hill <sjhill@mips.com> | 2013-01-03 19:01:52 +0000 |
|---|---|---|
| committer | John Crispin <blogic@openwrt.org> | 2013-02-17 00:15:23 +0100 |
| commit | 32a7ede673cd0be580f24d855099a8a5f195e80c (patch) | |
| tree | 58529df42257c146094b0e3843be2a98ed18922b /arch/mips/kernel | |
| parent | f8fa4811dbb264aef13f982e963389fd828b1ac0 (diff) | |
MIPS: dsp: Add assembler support for DSP ASEs.
Newer toolchains support the DSP and DSP Rev2 instructions. This patch
performs a check for that support and adds compiler and assembler
flags for only the files that need use those instructions.
Signed-off-by: Steven J. Hill <sjhill@mips.com>
Acked-by: Florian Fainelli <florian@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/4752/
Signed-off-by: John Crispin <blogic@openwrt.org>
Diffstat (limited to 'arch/mips/kernel')
| -rw-r--r-- | arch/mips/kernel/Makefile | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile index 007c33d73715..6c17e1f3d0ec 100644 --- a/arch/mips/kernel/Makefile +++ b/arch/mips/kernel/Makefile @@ -98,4 +98,35 @@ obj-$(CONFIG_HW_PERF_EVENTS) += perf_event_mipsxx.o obj-$(CONFIG_JUMP_LABEL) += jump_label.o +# +# DSP ASE supported for MIPS32 or MIPS64 Release 2 cores only. It is safe +# to enable DSP assembler support here even if the MIPS Release 2 CPU we +# are targetting does not support DSP because all code-paths making use of +# it properly check that the running CPU *actually does* support these +# instructions. +# +ifeq ($(CONFIG_CPU_MIPSR2), y) +CFLAGS_DSP = -DHAVE_AS_DSP + +# +# Check if assembler supports DSP ASE +# +ifeq ($(call cc-option-yn,-mdsp), y) +CFLAGS_DSP += -mdsp +endif + +# +# Check if assembler supports DSP ASE Rev2 +# +ifeq ($(call cc-option-yn,-mdspr2), y) +CFLAGS_DSP += -mdspr2 +endif + +CFLAGS_signal.o = $(CFLAGS_DSP) +CFLAGS_signal32.o = $(CFLAGS_DSP) +CFLAGS_process.o = $(CFLAGS_DSP) +CFLAGS_branch.o = $(CFLAGS_DSP) +CFLAGS_ptrace.o = $(CFLAGS_DSP) +endif + CPPFLAGS_vmlinux.lds := $(KBUILD_CFLAGS) |