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#include <asm/setup.h>
  13
  14/*
  15 * Emit one character to the boot console.
  16 */
  17void prom_putchar(char c)
  18{
  19        kvm_hypercall3(KVM_HC_MIPS_CONSOLE_OUTPUT, 0 /*  port 0 */,
  20                (unsigned long)&c, 1 /* len == 1 */);
  21}
  22
  23#ifdef CONFIG_VIRTIO_CONSOLE
  24static int paravirt_put_chars(u32 vtermno, const char *buf, int count)
  25{
  26        kvm_hypercall3(KVM_HC_MIPS_CONSOLE_OUTPUT, vtermno,
  27                (unsigned long)buf, count);
  28
  29        return count;
  30}
  31
  32static int __init paravirt_cons_init(void)
  33{
  34        virtio_cons_early_init(paravirt_put_chars);
  35        return 0;
  36}
  37core_initcall(paravirt_cons_init);
  38
  39#endif
  40