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authorEugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>2020-04-28 21:50:24 +0300
committerVineet Gupta <vgupta@synopsys.com>2020-04-29 11:53:51 -0700
commit40db9367ec1e653ea45400b69c3c7b80745b12eb (patch)
tree4fba0744912fe0145cb16b593b77888a0994cb51
parent799587d5731db9dcdafaac4002463aa7d9cd6cf7 (diff)
downloadlinux-40db9367ec1e653ea45400b69c3c7b80745b12eb.tar.gz
ARC: guard dsp early init against non ARCv2
As of today we guard early DSP init code with ARC_AUX_DSP_BUILD (0x7A) BCR check to verify that we have CPU with DSP configured. However that's not enough as in ARCv1 CPU the same BCR (0x7A) is used for checking MUL/MAC instructions presence. So, let's guard DSP early init against non ARCv2. Fixes: 4827d0cf744e ("ARC: handle DSP presence in HW") Reported-by: Angelo Ribeiro <angelor@synopsys.com> Suggested-by: Jose Abreu <oabreu@synopsys.com> Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
-rw-r--r--arch/arc/include/asm/dsp-impl.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arc/include/asm/dsp-impl.h b/arch/arc/include/asm/dsp-impl.h
index e1aa212ca6eb..cd5636dfeb6f 100644
--- a/arch/arc/include/asm/dsp-impl.h
+++ b/arch/arc/include/asm/dsp-impl.h
@@ -15,12 +15,14 @@
/* clobbers r5 register */
.macro DSP_EARLY_INIT
+#ifdef CONFIG_ISA_ARCV2
lr r5, [ARC_AUX_DSP_BUILD]
bmsk r5, r5, 7
breq r5, 0, 1f
mov r5, DSP_CTRL_DISABLED_ALL
sr r5, [ARC_AUX_DSP_CTRL]
1:
+#endif
.endm
/* clobbers r10, r11 registers pair */