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  1. /*
  2.  * Copyright (c) 2006 Ondrej Palkovsky
  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. /** @file
  30.  * @ingroup libcia32, libcamd64
  31.  */
  32.  
  33. #ifndef LIBC_ia32_DDI_H_
  34. #define LIBC_ia32_DDI_H_
  35.  
  36. #include <sys/types.h>
  37. #include <libarch/types.h>
  38.  
  39. #define IO_SPACE_BOUNDARY   ((void *) (64 * 1024))
  40.  
  41. static inline uint8_t pio_read_8(ioport8_t *port)
  42. {
  43.     uint8_t val;
  44.    
  45.     asm volatile (
  46.         "inb %w[port], %b[val]\n"
  47.         : [val] "=a" (val)
  48.         : [port] "d" (port)
  49.     );
  50.    
  51.     return val;
  52. }
  53.  
  54. static inline uint16_t pio_read_16(ioport16_t *port)
  55. {
  56.     uint16_t val;
  57.    
  58.     asm volatile (
  59.         "inw %w[port], %w[val]\n"
  60.         : [val] "=a" (val)
  61.         : [port] "d" (port)
  62.     );
  63.    
  64.     return val;
  65. }
  66.  
  67. static inline uint32_t pio_read_32(ioport32_t *port)
  68. {
  69.     uint32_t val;
  70.    
  71.     asm volatile (
  72.         "inl %w[port], %[val]\n"
  73.         : [val] "=a" (val)
  74.         : [port] "d" (port)
  75.     );
  76.    
  77.     return val;
  78. }
  79.  
  80. static inline void pio_write_8(ioport8_t *port, uint8_t val)
  81. {
  82.     asm volatile (
  83.         "outb %b[val], %w[port]\n"
  84.         :: [val] "a" (val), [port] "d" (port)
  85.     );
  86. }
  87.  
  88. static inline void pio_write_16(ioport16_t *port, uint16_t val)
  89. {
  90.     asm volatile (
  91.         "outw %w[val], %w[port]\n"
  92.         :: [val] "a" (val), [port] "d" (port)
  93.     );
  94. }
  95.  
  96. static inline void pio_write_32(ioport32_t *port, uint32_t val)
  97. {
  98.     asm volatile (
  99.         "outl %[val], %w[port]\n"
  100.         :: [val] "a" (val), [port] "d" (port)
  101.     );
  102. }
  103.  
  104. #endif
  105.