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  1. /*
  2.  * Copyright (c) 2008 Pavel Rimsky
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup sparc64
  30.  * @{
  31.  */
  32. /**
  33.  * @file
  34.  * @brief   Niagara input/output driver based on hypervisor calls.
  35.  */
  36.  
  37. #include <arch/drivers/niagara.h>
  38. #include <console/chardev.h>
  39. #include <console/console.h>
  40. #include <arch/sun4v/hypercall.h>
  41.  
  42. /* functions referenced from definitions of I/O operations structures */
  43. static void niagara_putchar(chardev_t *, const char);
  44.  
  45. /** character device operations */
  46. static chardev_operations_t niagara_ops = {
  47.     .write = niagara_putchar
  48. };
  49.  
  50. /** Niagara character device */
  51. chardev_t niagara_io;
  52.  
  53. /** Writes a single character to the standard output. */
  54. static void niagara_putchar(struct chardev * cd, const char c)
  55. {
  56.     __hypercall_fast1(CONS_PUTCHAR, c);
  57.     if (c == '\n')
  58.         __hypercall_fast1(CONS_PUTCHAR, '\r');
  59. }
  60.  
  61.  
  62. /**
  63.  * Grabs the input for kernel.
  64.  */
  65. void niagara_grab(void)
  66. {
  67. }
  68.  
  69. /**
  70.  * Releases the input so that userspace can use it.
  71.  */
  72. void niagara_release(void)
  73. {
  74. }
  75.  
  76. /**
  77.  * Initializes the input/output subsystem so that the Niagara standard
  78.  * input/output is used.
  79.  */
  80. void niagara_init(void)
  81. {
  82.     chardev_initialize("niagara_io", &niagara_io, &niagara_ops);
  83.     stdin = &niagara_io;
  84.     stdout = &niagara_io;
  85. }
  86.  
  87. /** @}
  88.  */
  89.