LXR linux/arch/mips/paravirt/serial.c

   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 */
  16int 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
  25static 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
  33static int __init paravirt_cons_init(void)
  34{
  35        virtio_cons_early_init(paravirt_put_chars);
  36        return 0;
  37}
  38core_initcall(paravirt_cons_init);
  39
  40#endif
  41