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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();
- }
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