arch/arm-efika/kernel/maygetchar.c

   1 /*
   2     Copyright © 2013, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include <aros/kernel.h>
   7
   8 #include <hardware/mx51_uart.h>
   9
  10 #include <kernel_base.h>
  11 #include <kernel_debug.h>
  12
  13 #include <proto/kernel.h>
  14
  15 /* See rom/kernel/maygetchar.c for documentation */
  16
  17 AROS_LH0(int, KrnMayGetChar,
  18     struct KernelBase *, KernelBase, 26, Kernel)
  19 {
  20     AROS_LIBFUNC_INIT
  21
  22     volatile MX51_UART * const uart = (MX51_UART *)UART1_BASE_ADDR;
  23
  24     if (uart->USR2 & UART_USR2_RDR)
  25         return uart->URXD;
  26     else
  27         return -1;
  28
  29     AROS_LIBFUNC_EXIT
  30 }