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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parm.h (1109B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Copyright (c) 2015 Endless Mobile, Inc.
      4 * Author: Carlo Caione <carlo@endlessm.com>
      5 */
      6
      7#ifndef __MESON_PARM_H
      8#define __MESON_PARM_H
      9
     10#include <linux/bits.h>
     11#include <linux/regmap.h>
     12
     13#define PMASK(width)			GENMASK(width - 1, 0)
     14#define SETPMASK(width, shift)		GENMASK(shift + width - 1, shift)
     15#define CLRPMASK(width, shift)		(~SETPMASK(width, shift))
     16
     17#define PARM_GET(width, shift, reg)					\
     18	(((reg) & SETPMASK(width, shift)) >> (shift))
     19#define PARM_SET(width, shift, reg, val)				\
     20	(((reg) & CLRPMASK(width, shift)) | ((val) << (shift)))
     21
     22#define MESON_PARM_APPLICABLE(p)		(!!((p)->width))
     23
     24struct parm {
     25	u16	reg_off;
     26	u8	shift;
     27	u8	width;
     28};
     29
     30static inline unsigned int meson_parm_read(struct regmap *map, struct parm *p)
     31{
     32	unsigned int val;
     33
     34	regmap_read(map, p->reg_off, &val);
     35	return PARM_GET(p->width, p->shift, val);
     36}
     37
     38static inline void meson_parm_write(struct regmap *map, struct parm *p,
     39				    unsigned int val)
     40{
     41	regmap_update_bits(map, p->reg_off, SETPMASK(p->width, p->shift),
     42			   val << p->shift);
     43}
     44
     45#endif /* __MESON_PARM_H */
     46