Release 4.12 include/soc/arc/aux.h

/*
 * Copyright (C) 2016-2017 Synopsys, Inc. (www.synopsys.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#ifndef __SOC_ARC_AUX_H__

#define __SOC_ARC_AUX_H__

#ifdef CONFIG_ARC


#define read_aux_reg(r)		__builtin_arc_lr(r)

/* gcc builtin sr needs reg param to be long immediate */

#define write_aux_reg(r, v)	__builtin_arc_sr((unsigned int)(v), r)

#else	/* !CONFIG_ARC */



static inline int read_aux_reg(u32 r)
{
	return 0;
}

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/*
 * function helps elide unused variable warning
 * see: http://lists.infradead.org/pipermail/linux-snps-arc/2016-November/001748.html
 */


static inline void write_aux_reg(u32 r, u32 v)
{
	;
}

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#endif


#define READ_BCR(reg, into)				\
{                                                       \
        unsigned int tmp;                               \
        tmp = read_aux_reg(reg);                        \
        if (sizeof(tmp) == sizeof(into)) {              \
                into = *((typeof(into) *)&tmp);         \
        } else {                                        \
                extern void bogus_undefined(void);      \
                bogus_undefined();                      \
        }                                               \
}


#define WRITE_AUX(reg, into)				\
{                                                       \
        unsigned int tmp;                               \
        if (sizeof(tmp) == sizeof(into)) {              \
                tmp = (*(unsigned int *)&(into));       \
                write_aux_reg(reg, tmp);                \
        } else  {                                       \
                extern void bogus_undefined(void);      \
                bogus_undefined();                      \
        }                                               \
}


#endif
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Directory: include/soc/arc

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