payloads/linuxcheck/i386.c

   1 /*
   2  *
   3  * Copyright (C) 2018 Google Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <libpayload-config.h>
  16 #include <libpayload.h>
  17 #include "linuxcheck.h"
  18
  19 void buts(char *s)
  20 {
  21         int i;
  22         for (i = 0; i < strlen(s); i++)
  23                 outb(s[i], 0x3f8);
  24 }
  25
  26 void hex4(u8 c)
  27 {
  28         static char *hex = "0123456789abcdef";
  29         outb(hex[c & 0xf], 0x3f8);
  30 }
  31
  32 void hex8(u8 c)
  33 {
  34         hex4(c >> 4);
  35         hex4(c);
  36 }
  37
  38 void hex16(u16 c)
  39 {
  40         hex8((u8)(c >> 8));
  41         hex8((u8)c);
  42 }
  43 void hex32(u32 c)
  44 {
  45         hex16((u16)(c >> 16));
  46         hex16((u16)c);
  47 }