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  1. /*
  2.  * Copyright (c) 2009 Jakub Jermar
  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 libsparc64
  31.  */
  32.  
  33. #ifndef LIBC_sparc64_DDI_H_
  34. #define LIBC_sparc64_DDI_H_
  35.  
  36. #include <sys/types.h>
  37. #include <libarch/types.h>
  38.  
  39. static inline memory_barrier(void)
  40. {
  41.     asm volatile ("membar #LoadLoad | #StoreStore\n" ::: "memory");
  42. }
  43.  
  44. static inline void pio_write_8(ioport8_t *port, uint8_t v)
  45. {
  46.     *port = v;
  47.     memory_barrier();
  48. }
  49.  
  50. static inline void pio_write_16(ioport16_t *port, uint16_t v)
  51. {
  52.     *port = v;
  53.     memory_barrier();
  54. }
  55.  
  56. static inline void pio_write_32(ioport32_t *port, uint32_t v)
  57. {
  58.     *port = v;
  59.     memory_barrier();
  60. }
  61.  
  62. static inline uint8_t pio_read_8(ioport8_t *port)
  63. {
  64.     uint8_t rv;
  65.  
  66.     rv = *port;
  67.     memory_barrier();
  68.  
  69.     return rv;
  70. }
  71.  
  72. static inline uint16_t pio_read_16(ioport16_t *port)
  73. {
  74.     uint16_t rv;
  75.  
  76.     rv = *port;
  77.     memory_barrier();
  78.  
  79.     return rv;
  80. }
  81.  
  82. static inline uint32_t pio_read_32(ioport32_t *port)
  83. {
  84.     uint32_t rv;
  85.  
  86.     rv = *port;
  87.     memory_barrier();
  88.  
  89.     return rv;
  90. }
  91.  
  92. #endif
  93.