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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();
| }
|
|
