提交 32a7ede6 编写于 作者: S Steven J. Hill 提交者: John Crispin

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: NSteven J. Hill <sjhill@mips.com>
Acked-by: NFlorian Fainelli <florian@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/4752/Signed-off-by: NJohn Crispin <blogic@openwrt.org>
上级 f8fa4811
......@@ -1155,36 +1155,26 @@ do { \
: "=r" (__res)); \
__res;})
#ifdef HAVE_AS_DSP
#define rddsp(mask) \
({ \
unsigned int __res; \
unsigned int __dspctl; \
\
__asm__ __volatile__( \
" .set push \n" \
" .set noat \n" \
" # rddsp $1, %x1 \n" \
" .word 0x7c000cb8 | (%x1 << 16) \n" \
" move %0, $1 \n" \
" .set pop \n" \
: "=r" (__res) \
" rddsp %0, %x1 \n" \
: "=r" (__dspctl) \
: "i" (mask)); \
__res; \
__dspctl; \
})
#define wrdsp(val, mask) \
do { \
__asm__ __volatile__( \
" .set push \n" \
" .set noat \n" \
" move $1, %0 \n" \
" # wrdsp $1, %x1 \n" \
" .word 0x7c2004f8 | (%x1 << 11) \n" \
" .set pop \n" \
: \
" wrdsp %0, %x1 \n" \
: \
: "r" (val), "i" (mask)); \
} while (0)
#if 0 /* Need DSP ASE capable assembler ... */
#define mflo0() ({ long mflo0; __asm__("mflo %0, $ac0" : "=r" (mflo0)); mflo0;})
#define mflo1() ({ long mflo1; __asm__("mflo %0, $ac1" : "=r" (mflo1)); mflo1;})
#define mflo2() ({ long mflo2; __asm__("mflo %0, $ac2" : "=r" (mflo2)); mflo2;})
......@@ -1207,6 +1197,35 @@ do { \
#else
#define rddsp(mask) \
({ \
unsigned int __res; \
\
__asm__ __volatile__( \
" .set push \n" \
" .set noat \n" \
" # rddsp $1, %x1 \n" \
" .word 0x7c000cb8 | (%x1 << 16) \n" \
" move %0, $1 \n" \
" .set pop \n" \
: "=r" (__res) \
: "i" (mask)); \
__res; \
})
#define wrdsp(val, mask) \
do { \
__asm__ __volatile__( \
" .set push \n" \
" .set noat \n" \
" move $1, %0 \n" \
" # wrdsp $1, %x1 \n" \
" .word 0x7c2004f8 | (%x1 << 11) \n" \
" .set pop \n" \
: \
: "r" (val), "i" (mask)); \
} while (0)
#define mfhi0() \
({ \
unsigned long __treg; \
......
......@@ -98,4 +98,35 @@ obj-$(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)
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