src/helper/types.h

   1 /***************************************************************************
   2  *   Copyright (C) 2004, 2005 by Dominic Rath                              *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 Øyvind 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
  26 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 #ifndef u8
  31 typedef unsigned char u8;
  32 #endif
  33
  34 #ifndef u16
  35 typedef unsigned short u16;
  36 #endif
  37
  38 #ifndef u32
  39 typedef unsigned int u32;
  40 #endif
  41
  42 #ifndef u64
  43 typedef unsigned long long u64;
  44 #endif
  45
  46 typedef struct jtag_tap_s jtag_tap_t;
  47
  48 #ifdef HAVE_STDBOOL_H
  49 #include <stdbool.h>
  50 #else   /* HAVE_STDBOOL_H */
  51 #define __bool_true_false_are_defined 1
  52
  53 #ifndef __cplusplus
  54
  55 #define false   0
  56 #define true            1
  57
  58 #define bool            _Bool
  59 typedef int _Bool;
  60 #endif  /* __cplusplus */
  61
  62 #endif  /* HAVE_STDBOOL_H */
  63
  64 /* DANGER!!!! here be dragons!
  65  *
  66  * Leave these fn's as byte accesses because it is safe
  67  * across architectures. Clever usage of 32 bit access
  68  * will create problems on some hosts.
  69  *
  70  * Note that the "buf" pointer in memory is probably unaligned.
  71  *
  72  * Were these functions to be re-written to take a 32 bit wide or 16 bit wide
  73  * memory access shortcut, then on some CPU's, i.e. ARM7, the 2 lsbytes of the address are
  74  * ignored for 32 bit access, whereas on other CPU's a 32 bit wide unaligned memory access
  75  * will cause an exception, and lastly on x86, an unaligned "greater than bytewide"
  76  * memory access works as if aligned.  So what follows below will work for all
  77  * platforms and gives the compiler leeway to do its own platform specific optimizations.
  78  *
  79  * Again, note that the "buf" pointer in memory is probably unaligned.
  80  */
  81
  82
  83 static inline u32 le_to_h_u32(const u8* buf)
  84 {
  85         return (u32)(buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24);
  86 }
  87
  88 static inline u16 le_to_h_u16(const u8* buf)
  89 {
  90         return (u16)(buf[0] | buf[1] << 8);
  91 }
  92
  93 static inline u32 be_to_h_u32(const u8* buf)
  94 {
  95         return (u32)(buf[3] | buf[2] << 8 | buf[1] << 16 | buf[0] << 24);
  96 }
  97
  98 static inline u16 be_to_h_u16(const u8* buf)
  99 {
 100         return (u16)(buf[1] | buf[0] << 8);
 101 }
 102
 103 static inline void h_u32_to_le(u8* buf, int val)
 104 {
 105         buf[3] = (u8) (val >> 24);
 106         buf[2] = (u8) (val >> 16);
 107         buf[1] = (u8) (val >> 8);
 108         buf[0] = (u8) (val >> 0);
 109 }
 110
 111 static inline void h_u32_to_be(u8* buf, int val)
 112 {
 113         buf[0] = (u8) (val >> 24);
 114         buf[1] = (u8) (val >> 16);
 115         buf[2] = (u8) (val >> 8);
 116         buf[3] = (u8) (val >> 0);
 117 }
 118
 119 static inline void h_u16_to_le(u8* buf, int val)
 120 {
 121         buf[1] = (u8) (val >> 8);
 122         buf[0] = (u8) (val >> 0);
 123 }
 124
 125 static inline void h_u16_to_be(u8* buf, int val)
 126 {
 127         buf[0] = (u8) (val >> 8);
 128         buf[1] = (u8) (val >> 0);
 129 }
 130
 131 #endif /* TYPES_H */