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  1. /***************************************************************************
  2. * Copyright (C) 2004, 2005 by Dominic Rath *
  3. * Dominic.Rath@gmx.de *
  4. * *
  5. * Copyright (C) 2007,2008 √ėyvind Harboe *
  6. * oyvind.harboe@zylin.com *
  7. * *
  8. * This program is free software; you can redistribute it and/or modify *
  9. * it under the terms of the GNU General Public License as published by *
  10. * the Free Software Foundation; either version 2 of the License, or *
  11. * (at your option) any later version. *
  12. * *
  13. * This program is distributed in the hope that it will be useful, *
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of *
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
  16. * GNU General Public License for more details. *
  17. * *
  18. * You should have received a copy of the GNU General Public License *
  19. * along with this program; if not, write to the *
  20. * Free Software Foundation, Inc., *
  21. * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
  22. ***************************************************************************/
  23. #ifndef TYPES_H
  24. #define TYPES_H
  25. #ifdef HAVE_CONFIG_H
  26. #include "config.h"
  27. #endif
  28. #ifndef u8
  29. typedef unsigned char u8;
  30. #endif
  31. #ifndef u16
  32. typedef unsigned short u16;
  33. #endif
  34. #ifndef u32
  35. typedef unsigned int u32;
  36. #endif
  37. #ifndef u64
  38. typedef unsigned long long u64;
  39. #endif
  40. typedef struct jtag_tap_s jtag_tap_t;
  41. /* DANGER!!!! here be dragons!
  42. *
  43. * Leave these fn's as byte accesses because it is safe
  44. * across architectures. Clever usage of 32 bit access
  45. * will create problems on some hosts.
  46. *
  47. * Note that the "buf" pointer in memory is probably unaligned.
  48. *
  49. * Were these functions to be re-written to take a 32 bit wide or 16 bit wide
  50. * memory access shortcut, then on some CPU's, i.e. ARM7, the 2 lsbytes of the address are
  51. * ignored for 32 bit access, whereas on other CPU's a 32 bit wide unaligned memory access
  52. * will cause an exception, and lastly on x86, an unaligned "greater than bytewide"
  53. * memory access works as if aligned. So what follows below will work for all
  54. * platforms and gives the compiler leeway to do its own platform specific optimizations.
  55. *
  56. * Again, note that the "buf" pointer in memory is probably unaligned.
  57. */
  58. static inline u32 le_to_h_u32(const u8* buf)
  59. {
  60. return (u32)(buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24);
  61. }
  62. static inline u16 le_to_h_u16(const u8* buf)
  63. {
  64. return (u16)(buf[0] | buf[1] << 8);
  65. }
  66. static inline u32 be_to_h_u32(const u8* buf)
  67. {
  68. return (u32)(buf[3] | buf[2] << 8 | buf[1] << 16 | buf[0] << 24);
  69. }
  70. static inline u16 be_to_h_u16(const u8* buf)
  71. {
  72. return (u16)(buf[1] | buf[0] << 8);
  73. }
  74. static inline void h_u32_to_le(u8* buf, int val)
  75. {
  76. buf[3] = (u8) (val >> 24);
  77. buf[2] = (u8) (val >> 16);
  78. buf[1] = (u8) (val >> 8);
  79. buf[0] = (u8) (val >> 0);
  80. }
  81. static inline void h_u32_to_be(u8* buf, int val)
  82. {
  83. buf[0] = (u8) (val >> 24);
  84. buf[1] = (u8) (val >> 16);
  85. buf[2] = (u8) (val >> 8);
  86. buf[3] = (u8) (val >> 0);
  87. }
  88. static inline void h_u16_to_le(u8* buf, int val)
  89. {
  90. buf[1] = (u8) (val >> 8);
  91. buf[0] = (u8) (val >> 0);
  92. }
  93. static inline void h_u16_to_be(u8* buf, int val)
  94. {
  95. buf[0] = (u8) (val >> 8);
  96. buf[1] = (u8) (val >> 0);
  97. }
  98. #endif /* TYPES_H */