bertos/cpu/types.h

   1 /**
   2  * \file
   3  * <!--
   4  * This file is part of BeRTOS.
   5  *
   6  * Bertos is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  * As a special exception, you may use this file as part of a free software
  21  * library without restriction.  Specifically, if other files instantiate
  22  * templates or use macros or inline functions from this file, or you compile
  23  * this file and link it with other files to produce an executable, this
  24  * file does not by itself cause the resulting executable to be covered by
  25  * the GNU General Public License.  This exception does not however
  26  * invalidate any other reasons why the executable file might be covered by
  27  * the GNU General Public License.
  28  *
  29  * Copyright 2004, 2005, 2006, 2007 Develer S.r.l. (http://www.develer.com/)
  30  * Copyright 2004 Giovanni Bajo
  31  *
  32  * -->
  33  *
  34  * \brief CPU-specific type definitions.
  35  *
  36  * \author Giovanni Bajo <rasky@develer.com>
  37  * \author Bernie Innocenti <bernie@codewiz.org>
  38  * \author Stefano Fedrigo <aleph@develer.com>
  39  * \author Francesco Sacchi <batt@develer.com>
  40  */
  41 #ifndef CPU_TYPES_H
  42 #define CPU_TYPES_H
  43
  44 #include "detect.h"
  45 #include "attr.h"
  46 #include <cfg/compiler.h> /* for uintXX_t */
  47
  48 #if CPU_I196
  49
  50         typedef uint16_t cpu_flags_t; // FIXME
  51         typedef unsigned int cpu_stack_t;
  52         typedef cpu_stack_t cpu_aligned_stack_t;
  53         typedef unsigned int cpu_atomic_t;
  54         #warning Verify following constant
  55         #define SIZEOF_CPUSTACK_T 2
  56         #define SIZEOF_CPUALIGNED_T SIZEOF_CPUSTACK_T
  57
  58 #elif CPU_X86
  59
  60         /* Get cpu_flags_t definition from the hosting environment. */
  61         #include <cfg/os.h>
  62         #if OS_EMBEDDED
  63                 typedef uint32_t cpu_flags_t; // FIXME
  64         #endif /* OS_EMBEDDED */
  65
  66         typedef uint32_t cpu_atomic_t;
  67
  68         #if CPU_X86_64
  69                 typedef uint64_t cpu_stack_t;
  70                 typedef cpu_stack_t cpu_aligned_stack_t;
  71                 #define SIZEOF_CPUSTACK_T 8
  72                 #define SIZEOF_CPUALIGNED_T SIZEOF_CPUSTACK_T
  73         #else
  74                 typedef uint32_t cpu_stack_t;
  75                 typedef cpu_stack_t cpu_aligned_stack_t;
  76                 #define SIZEOF_CPUSTACK_T 4
  77                 #define SIZEOF_CPUALIGNED_T SIZEOF_CPUSTACK_T
  78         #endif
  79
  80 #elif CPU_ARM || CPU_CM3
  81
  82         typedef uint32_t cpu_flags_t;
  83         typedef uint32_t cpu_atomic_t;
  84         typedef uint32_t cpu_stack_t;
  85         #define SIZEOF_CPUSTACK_T 4
  86
  87         typedef uint64_t cpu_aligned_stack_t;
  88         #define SIZEOF_CPUALIGNED_T 8
  89
  90 #elif CPU_PPC
  91
  92         /* Get cpu_flags_t definition from the hosting environment. */
  93         #include <cfg/os.h>
  94         #if OS_EMBEDDED
  95                 typedef uint32_t cpu_flags_t;
  96         #endif
  97
  98         typedef uint32_t cpu_atomic_t;
  99         typedef uint32_t cpu_stack_t;
 100         typedef  cpu_stack_t cpu_aligned_stack_t;
 101         #define SIZEOF_CPUSTACK_T 4
 102         #define SIZEOF_CPUALIGNED_T SIZEOF_CPUSTACK_T
 103
 104 #elif CPU_DSP56K
 105
 106         typedef uint16_t cpu_flags_t;
 107         typedef uint16_t cpu_atomic_t;
 108         typedef unsigned int cpu_stack_t;
 109         typedef cpu_stack_t cpu_aligned_stack_t;
 110         #warning Verify following costant
 111         #define SIZEOF_CPUSTACK_T 2
 112         #define SIZEOF_CPUALIGNED_T SIZEOF_CPUSTACK_T
 113
 114 #elif CPU_AVR
 115
 116         typedef uint8_t cpu_flags_t;
 117         typedef uint8_t cpu_atomic_t;
 118         typedef uint8_t cpu_stack_t;
 119         typedef cpu_stack_t cpu_aligned_stack_t;
 120         #define SIZEOF_CPUSTACK_T 1
 121         #define SIZEOF_CPUALIGNED_T SIZEOF_CPUSTACK_T
 122
 123 #else
 124         #error No CPU_... defined.
 125 #endif
 126
 127 /**
 128  * \name Default type sizes.
 129  *
 130  * These defaults are reasonable for most 16/32bit machines.
 131  * Some of these macros may be overridden by CPU-specific code above.
 132  *
 133  * ANSI C requires that the following equations be true:
 134  * \code
 135  *   sizeof(char) <= sizeof(short) <= sizeof(int) <= sizeof(long)
 136  *   sizeof(float) <= sizeof(double)
 137  *   CPU_BITS_PER_CHAR  >= 8
 138  *   CPU_BITS_PER_SHORT >= 8
 139  *   CPU_BITS_PER_INT   >= 16
 140  *   CPU_BITS_PER_LONG  >= 32
 141  * \endcode
 142  * \{
 143  */
 144 #ifndef SIZEOF_CHAR
 145 #define SIZEOF_CHAR  1
 146 #endif
 147
 148 #ifndef SIZEOF_SHORT
 149 #define SIZEOF_SHORT  2
 150 #endif
 151
 152 #ifndef SIZEOF_INT
 153 #if CPU_REG_BITS < 32
 154         #define SIZEOF_INT  2
 155 #else
 156         #define SIZEOF_INT  4
 157 #endif
 158 #endif /* !SIZEOF_INT */
 159
 160 #ifndef SIZEOF_LONG
 161 #if CPU_REG_BITS > 32
 162         #define SIZEOF_LONG  8
 163 #else
 164         #define SIZEOF_LONG  4
 165 #endif
 166 #endif
 167
 168 #ifndef SIZEOF_PTR
 169 #if CPU_REG_BITS < 32
 170         #define SIZEOF_PTR   2
 171 #elif CPU_REG_BITS == 32
 172         #define SIZEOF_PTR   4
 173 #else /* CPU_REG_BITS > 32 */
 174         #define SIZEOF_PTR   8
 175 #endif
 176 #endif
 177
 178 #ifndef SIZEOF_SIZE_T
 179 #if CPU_REG_BITS < 32
 180         #define SIZEOF_SIZE_T   2
 181 #elif CPU_REG_BITS == 32
 182         #define SIZEOF_SIZE_T   4
 183 #else /* CPU_REG_BITS > 32 */
 184         #define SIZEOF_SIZE_T   8
 185 #endif
 186 #endif
 187
 188 #ifndef CPU_BITS_PER_CHAR
 189 #define CPU_BITS_PER_CHAR   (SIZEOF_CHAR * 8)
 190 #endif
 191
 192 #ifndef CPU_BITS_PER_SHORT
 193 #define CPU_BITS_PER_SHORT  (SIZEOF_SHORT * CPU_BITS_PER_CHAR)
 194 #endif
 195
 196 #ifndef CPU_BITS_PER_INT
 197 #define CPU_BITS_PER_INT    (SIZEOF_INT * CPU_BITS_PER_CHAR)
 198 #endif
 199
 200 #ifndef CPU_BITS_PER_LONG
 201 #define CPU_BITS_PER_LONG   (SIZEOF_LONG * CPU_BITS_PER_CHAR)
 202 #endif
 203
 204 #ifndef CPU_BITS_PER_PTR
 205 #define CPU_BITS_PER_PTR    (SIZEOF_PTR * CPU_BITS_PER_CHAR)
 206 #endif
 207
 208
 209 /*\}*/
 210
 211 #ifndef INT_MAX
 212         #define INT_MAX ((int)((unsigned int)~0 >> 1))
 213         #define INT_MIN (-INT_MAX - 1)
 214 #endif
 215
 216 /* Sanity checks for the above definitions */
 217 STATIC_ASSERT(sizeof(char) == SIZEOF_CHAR);
 218 STATIC_ASSERT(sizeof(short) == SIZEOF_SHORT);
 219 STATIC_ASSERT(sizeof(long) == SIZEOF_LONG);
 220 STATIC_ASSERT(sizeof(int) == SIZEOF_INT);
 221 STATIC_ASSERT(sizeof(void *) == SIZEOF_PTR);
 222 STATIC_ASSERT(sizeof(int8_t) * CPU_BITS_PER_CHAR == 8);
 223 STATIC_ASSERT(sizeof(uint8_t) * CPU_BITS_PER_CHAR == 8);
 224 STATIC_ASSERT(sizeof(int16_t) * CPU_BITS_PER_CHAR == 16);
 225 STATIC_ASSERT(sizeof(uint16_t) * CPU_BITS_PER_CHAR == 16);
 226 STATIC_ASSERT(sizeof(int32_t) * CPU_BITS_PER_CHAR == 32);
 227 STATIC_ASSERT(sizeof(uint32_t) * CPU_BITS_PER_CHAR == 32);
 228 #ifdef __HAS_INT64_T__
 229 STATIC_ASSERT(sizeof(int64_t) * CPU_BITS_PER_CHAR == 64);
 230 STATIC_ASSERT(sizeof(uint64_t) * CPU_BITS_PER_CHAR == 64);
 231 #endif
 232 STATIC_ASSERT(sizeof(cpu_stack_t) == SIZEOF_CPUSTACK_T);
 233 STATIC_ASSERT(sizeof(cpu_aligned_stack_t) == SIZEOF_CPUALIGNED_T);
 234 STATIC_ASSERT(sizeof(size_t) == SIZEOF_SIZE_T);
 235
 236
 237 /**
 238  * Macros for hardware access, both direct and via the bit-band region.
 239  */
 240 /*\{*/
 241 #define HWREG(x)   (*((reg32_t *)(x)))
 242 #define HWREGH(x)  (*((reg16_t *)(x)))
 243 #define HWREGB(x)  (*((reg8_t *)(x)))
 244 /*\}*/
 245
 246 #endif /* CPU_TYPES_H */