/* SPDX-License-Identifier: GPL-2.0-only */
/* Copyright (c) 2010, 2014 The Linux Foundation. All rights reserved.
 */

#include <asm/barrier.h>

static inline u32 __dcc_getstatus(void)
{
        u32 __ret;
        asm volatile("mrc p14, 0, %0, c0, c1, 0 @ read comms ctrl reg"
                : "=r" (__ret) : : "cc");

        return __ret;
}

static inline char __dcc_getchar(void)
{
        char __c;

        asm volatile("mrc p14, 0, %0, c0, c5, 0 @ read comms data reg"
                : "=r" (__c));
        isb();

        return __c;
}

static inline void __dcc_putchar(char c)
{
        asm volatile("mcr p14, 0, %0, c0, c5, 0 @ write a char"
                : /* no output register */
                : "r" (c));
        isb();
}