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/* 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();
}