1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2013 Cavium, Inc.
7 */
8
9 #include <linux/kernel.h>
10 #include <linux/virtio_console.h>
11 #include <linux/kvm_para.h>
12
13 /*
14 * Emit one character to the boot console.
15 */
prom_putchar(char c)16 int prom_putchar(char c)
17 {
18 kvm_hypercall3(KVM_HC_MIPS_CONSOLE_OUTPUT, 0 /* port 0 */,
19 (unsigned long)&c, 1 /* len == 1 */);
20
21 return 1;
22 }
23
24 #ifdef CONFIG_VIRTIO_CONSOLE
paravirt_put_chars(u32 vtermno,const char * buf,int count)25 static int paravirt_put_chars(u32 vtermno, const char *buf, int count)
26 {
27 kvm_hypercall3(KVM_HC_MIPS_CONSOLE_OUTPUT, vtermno,
28 (unsigned long)buf, count);
29
30 return count;
31 }
32
paravirt_cons_init(void)33 static int __init paravirt_cons_init(void)
34 {
35 virtio_cons_early_init(paravirt_put_chars);
36 return 0;
37 }
38 core_initcall(paravirt_cons_init);
39
40 #endif
41