cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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aux.h (1184B)

      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_ARC
     10
     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 warning
     25 * see: https://lists.infradead.org/pipermail/linux-snps-arc/2016-November/001748.html
     26 */
     27static inline void write_aux_reg(u32 r, u32 v)
     28{
     29	;
     30}
     31
     32#endif
     33
     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#endif