kernel/console.c

   1 /*
   2 ** Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
   3 ** Distributed under the terms of the NewOS License.
   4 */
   5 #include <kernel/kernel.h>
   6 #include <kernel/console.h>
   7 #include <kernel/debug.h>
   8 #include <kernel/int.h>
   9 #include <kernel/smp.h>
  10 #include <kernel/sem.h>
  11 #include <kernel/vfs.h>
  12
  13 #include <stdarg.h>
  14 #include <stdio.h>
  15
  16 // from con.h
  17 enum {
  18         CONSOLE_OP_WRITEXY = 2376
  19 };
  20
  21 struct console_op_xy_struct {
  22         int x;
  23         int y;
  24         char buf[256];
  25 };
  26
  27 static int console_fd = -1;
  28
  29 int kprintf(const char *fmt, ...)
  30 {
  31         int ret = 0;
  32         va_list args;
  33         char temp[256];
  34
  35         if(console_fd >= 0) {
  36                 va_start(args, fmt);
  37                 ret = vsprintf(temp,fmt,args);
  38                 va_end(args);
  39
  40                 sys_write(console_fd, temp, 0, ret);
  41         }
  42         return ret;
  43 }
  44
  45 int kprintf_xy(int x, int y, const char *fmt, ...)
  46 {
  47         int ret = 0;
  48         va_list args;
  49         struct console_op_xy_struct buf;
  50
  51         if(console_fd >= 0) {
  52                 va_start(args, fmt);
  53                 ret = vsprintf(buf.buf,fmt,args);
  54                 va_end(args);
  55
  56                 buf.x = x;
  57                 buf.y = y;
  58                 sys_ioctl(console_fd, CONSOLE_OP_WRITEXY, &buf, ret + sizeof(buf.x) + sizeof(buf.y));
  59         }
  60         return ret;
  61 }
  62
  63 int con_init(kernel_args *ka)
  64 {
  65         dprintf("con_init: entry\n");
  66
  67         console_fd = sys_open("/dev/console", STREAM_TYPE_DEVICE, 0);
  68         dprintf("console_fd = %d\n", console_fd);
  69
  70         return 0;
  71 }