1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) 2012 ARM Ltd.
4  * Author: Marc Zyngier <marc.zyngier@arm.com>
5  *
6  * Adapted for ARM and earlycon:
7  * Copyright (C) 2014 Linaro Ltd.
8  * Author: Rob Herring <robh@kernel.org>
9  */
10 #include <linux/kernel.h>
11 #include <linux/console.h>
12 #include <linux/init.h>
13 #include <linux/serial_core.h>
14 #include <asm/semihost.h>
15 
16 static void smh_write(struct console *con, const char *s, unsigned n)
17 {
18 	struct earlycon_device *dev = con->data;
19 	uart_console_write(&dev->port, s, n, smh_putc);
20 }
21 
22 static int
23 __init early_smh_setup(struct earlycon_device *device, const char *opt)
24 {
25 	device->con->write = smh_write;
26 	return 0;
27 }
28 EARLYCON_DECLARE(smh, early_smh_setup);
29