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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Copyright (C) 2016-2017 Synopsys, Inc. (www.synopsys.com)4 */5 6#ifndef __SOC_ARC_AUX_H__7#define __SOC_ARC_AUX_H__8 9#ifdef CONFIG_ARC10 11#define read_aux_reg(r) __builtin_arc_lr(r)12 13/* gcc builtin sr needs reg param to be long immediate */14#define write_aux_reg(r, v) __builtin_arc_sr((unsigned int)(v), r)15 16#else /* !CONFIG_ARC */17 18static inline int read_aux_reg(u32 r)19{20 return 0;21}22 23/*24 * function helps elide unused variable warning25 * see: https://lists.infradead.org/pipermail/linux-snps-arc/2016-November/001748.html26 */27static inline void write_aux_reg(u32 r, u32 v)28{29 ;30}31 32#endif33 34#define READ_BCR(reg, into) \35{ \36 unsigned int tmp; \37 tmp = read_aux_reg(reg); \38 if (sizeof(tmp) == sizeof(into)) { \39 into = *((typeof(into) *)&tmp); \40 } else { \41 extern void bogus_undefined(void); \42 bogus_undefined(); \43 } \44}45 46#define WRITE_AUX(reg, into) \47{ \48 unsigned int tmp; \49 if (sizeof(tmp) == sizeof(into)) { \50 tmp = (*(unsigned int *)&(into)); \51 write_aux_reg(reg, tmp); \52 } else { \53 extern void bogus_undefined(void); \54 bogus_undefined(); \55 } \56}57 58 59#endif60