1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) 2012 ARM Ltd.
4  * Author: Marc Zyngier <[email protected]>
5  *
6  * Adapted for ARM and earlycon:
7  * Copyright (C) 2014 Linaro Ltd.
8  * Author: Rob Herring <[email protected]>
9  */
10 
11 #ifndef _ARM64_SEMIHOST_H_
12 #define _ARM64_SEMIHOST_H_
13 
14 struct uart_port;
15 
smh_putc(struct uart_port * port,unsigned char c)16 static inline void smh_putc(struct uart_port *port, unsigned char c)
17 {
18 	asm volatile("mov  x1, %0\n"
19 		     "mov  x0, #3\n"
20 		     "hlt  0xf000\n"
21 		     : : "r" (&c) : "x0", "x1", "memory");
22 }
23 
24 #endif /* _ARM64_SEMIHOST_H_ */
25