From e59c3797204b4cd565c0792620341e3d39f9240b Mon Sep 17 00:00:00 2001 From: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Date: Tue, 28 Nov 2017 16:48:40 +0300 Subject: [PATCH] ARC: add macro to get CPU id ARCNUM [15:8] field in ARC_AUX_IDENTITY register allows us to uniquely identify each core in a multi-core system. I.e. with help of this macro each core may get its index in SMP system. Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> --- arch/arc/include/asm/arcregs.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arc/include/asm/arcregs.h b/arch/arc/include/asm/arcregs.h index 54a9b00d4c..2a1bfc74ec 100644 --- a/arch/arc/include/asm/arcregs.h +++ b/arch/arc/include/asm/arcregs.h @@ -72,6 +72,9 @@ /* gcc builtin sr needs reg param to be long immediate */ #define write_aux_reg(reg_immed, val) \ __builtin_arc_sr((unsigned int)val, reg_immed) + +/* ARCNUM [15:8] - field to identify each core in a multi-core system */ +#define CPU_ID_GET() ((read_aux_reg(ARC_AUX_IDENTITY) & 0xFF00) >> 8) #endif /* __ASSEMBLY__ */ #endif /* _ASM_ARC_ARCREGS_H */ -- 2.39.5