arch/arm-raspi/kernel/maygetchar.c

   1 /*
   2     Copyright � 2013-2015, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include <aros/kernel.h>
   7
   8 #include <hardware/bcm283x.h>
   9 #include <hardware/pl011uart.h>
  10
  11 #include <kernel_base.h>
  12 #include <kernel_debug.h>
  13
  14 #include <proto/kernel.h>
  15 #include <stdint.h>
  16
  17 #undef ARM_PERIIOBASE
  18 extern uint32_t __arm_periiobase;
  19 #define ARM_PERIIOBASE (__arm_periiobase)
  20
  21 /* See rom/kernel/maygetchar.c for documentation */
  22
  23 AROS_LH0(int, KrnMayGetChar,
  24     struct KernelBase *, KernelBase, 26, Kernel)
  25 {
  26     AROS_LIBFUNC_INIT
  27
  28     if ((*(volatile uint32_t *)(PL011_0_BASE + PL011_FR) & PL011_FR_RXFE) == 0)
  29         return (int)*(volatile uint32_t *)(PL011_0_BASE + PL011_DR);
  30
  31     return -1;
  32
  33     AROS_LIBFUNC_EXIT
  34 }