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 <limits.h>
  47 #include <cfg/compiler.h> /* for uintXX_t */
  48
  49 #if CPU_I196
  50
  51         typedef uint16_t cpu_flags_t; // FIXME
  52         typedef unsigned int cpu_stack_t;
  53         typedef cpu_stack_t cpu_aligned_stack_t;
  54         typedef unsigned int cpu_atomic_t;
  55         #warning Verify following constant
  56         #define SIZEOF_CPUSTACK_T 2
  57         #define SIZEOF_CPUALIGNED_T SIZEOF_CPUSTACK_T
  58
  59 #elif CPU_X86
  60
  61         /* Get cpu_flags_t definition from the hosting environment. */
  62         #include <cfg/os.h>
  63         #if OS_EMBEDDED
  64                 typedef uint32_t cpu_flags_t; // FIXME
  65         #endif /* OS_EMBEDDED */
  66
  67         typedef uint32_t cpu_atomic_t;
  68
  69         #if CPU_X86_64
  70                 typedef uint64_t cpu_stack_t;
  71                 typedef cpu_stack_t cpu_aligned_stack_t;
  72                 #define SIZEOF_CPUSTACK_T 8
  73                 #define SIZEOF_CPUALIGNED_T SIZEOF_CPUSTACK_T
  74         #else
  75                 typedef uint32_t cpu_stack_t;
  76                 typedef cpu_stack_t cpu_aligned_stack_t;
  77                 #define SIZEOF_CPUSTACK_T 4
  78                 #define SIZEOF_CPUALIGNED_T SIZEOF_CPUSTACK_T
  79         #endif
  80
  81 #elif CPU_ARM || CPU_CM3
  82
  83         typedef uint32_t cpu_flags_t;
  84         typedef uint32_t cpu_atomic_t;
  85         typedef uint32_t cpu_stack_t;
  86         #define SIZEOF_CPUSTACK_T 4
  87
  88         typedef uint64_t cpu_aligned_stack_t;
  89         #define SIZEOF_CPUALIGNED_T 8
  90
  91 #elif CPU_PPC
  92
  93         /* Get cpu_flags_t definition from the hosting environment. */
  94         #include <cfg/os.h>
  95         #if OS_EMBEDDED
  96                 typedef uint32_t cpu_flags_t;
  97         #endif
  98
  99         typedef uint32_t cpu_atomic_t;
 100         typedef uint32_t cpu_stack_t;
 101         typedef  cpu_stack_t cpu_aligned_stack_t;
 102         #define SIZEOF_CPUSTACK_T 4
 103         #define SIZEOF_CPUALIGNED_T SIZEOF_CPUSTACK_T
 104
 105 #elif CPU_DSP56K
 106
 107         typedef uint16_t cpu_flags_t;
 108         typedef uint16_t cpu_atomic_t;
 109         typedef unsigned int cpu_stack_t;
 110         typedef cpu_stack_t cpu_aligned_stack_t;
 111         #warning Verify following costant
 112         #define SIZEOF_CPUSTACK_T 2
 113         #define SIZEOF_CPUALIGNED_T SIZEOF_CPUSTACK_T
 114
 115 #elif CPU_AVR
 116
 117         typedef uint8_t cpu_flags_t;
 118         typedef uint8_t cpu_atomic_t;
 119         typedef uint8_t cpu_stack_t;
 120         typedef cpu_stack_t cpu_aligned_stack_t;
 121         #define SIZEOF_CPUSTACK_T 1
 122         #define SIZEOF_CPUALIGNED_T SIZEOF_CPUSTACK_T
 123
 124 #elif CPU_MSP430
 125
 126         typedef uint16_t cpu_flags_t;
 127         typedef uint16_t cpu_stack_t;
 128         typedef cpu_stack_t cpu_aligned_stack_t;
 129         #define SIZEOF_CPUSTACK_T 2
 130         #define SIZEOF_CPUALIGNED_T SIZEOF_CPUSTACK_T
 131
 132 #else
 133         #error No CPU_... defined.
 134 #endif
 135
 136 /**
 137  * \name Default type sizes.
 138  *
 139  * These defaults are reasonable for most 16/32bit machines.
 140  * Some of these macros may be overridden by CPU-specific code above.
 141  *
 142  * ANSI C requires that the following equations be true:
 143  * \code
 144  *   sizeof(char) <= sizeof(short) <= sizeof(int) <= sizeof(long)
 145  *   sizeof(float) <= sizeof(double)
 146  *   CPU_BITS_PER_CHAR  >= 8
 147  *   CPU_BITS_PER_SHORT >= 8
 148  *   CPU_BITS_PER_INT   >= 16
 149  *   CPU_BITS_PER_LONG  >= 32
 150  * \endcode
 151  * \{
 152  */
 153 #ifndef SIZEOF_CHAR
 154 #define SIZEOF_CHAR  1
 155 #endif
 156
 157 #ifndef SIZEOF_SHORT
 158 #define SIZEOF_SHORT  2
 159 #endif
 160
 161 #ifndef SIZEOF_INT
 162 #if CPU_REG_BITS < 32
 163         #define SIZEOF_INT  2
 164 #else
 165         #define SIZEOF_INT  4
 166 #endif
 167 #endif /* !SIZEOF_INT */
 168
 169 #ifndef SIZEOF_LONG
 170 #if CPU_REG_BITS > 32
 171         #define SIZEOF_LONG  8
 172 #else
 173         #define SIZEOF_LONG  4
 174 #endif
 175 #endif
 176
 177 #ifndef SIZEOF_PTR
 178 #if CPU_REG_BITS < 32
 179         #define SIZEOF_PTR   2
 180 #elif CPU_REG_BITS == 32
 181         #define SIZEOF_PTR   4
 182 #else /* CPU_REG_BITS > 32 */
 183         #define SIZEOF_PTR   8
 184 #endif
 185 #endif
 186
 187 #ifndef SIZEOF_SIZE_T
 188 #if CPU_REG_BITS < 32
 189         #define SIZEOF_SIZE_T   2
 190 #elif CPU_REG_BITS == 32
 191         #define SIZEOF_SIZE_T   4
 192 #else /* CPU_REG_BITS > 32 */
 193         #define SIZEOF_SIZE_T   8
 194 #endif
 195 #endif
 196
 197 #ifndef CPU_BITS_PER_CHAR
 198 #define CPU_BITS_PER_CHAR   (SIZEOF_CHAR * 8)
 199 #endif
 200
 201 #ifndef CPU_BITS_PER_SHORT
 202 #define CPU_BITS_PER_SHORT  (SIZEOF_SHORT * CPU_BITS_PER_CHAR)
 203 #endif
 204
 205 #ifndef CPU_BITS_PER_INT
 206 #define CPU_BITS_PER_INT    (SIZEOF_INT * CPU_BITS_PER_CHAR)
 207 #endif
 208
 209 #ifndef CPU_BITS_PER_LONG
 210 #define CPU_BITS_PER_LONG   (SIZEOF_LONG * CPU_BITS_PER_CHAR)
 211 #endif
 212
 213 #ifndef CPU_BITS_PER_PTR
 214 #define CPU_BITS_PER_PTR    (SIZEOF_PTR * CPU_BITS_PER_CHAR)
 215 #endif
 216
 217
 218 /*\}*/
 219
 220 #ifndef INT_MAX
 221         #define INT_MAX ((int)((unsigned int)~0 >> 1))
 222         #define INT_MIN (-INT_MAX - 1)
 223 #endif
 224
 225 /* Sanity checks for the above definitions */
 226 STATIC_ASSERT(sizeof(char) == SIZEOF_CHAR);
 227 STATIC_ASSERT(sizeof(short) == SIZEOF_SHORT);
 228 STATIC_ASSERT(sizeof(long) == SIZEOF_LONG);
 229 STATIC_ASSERT(sizeof(int) == SIZEOF_INT);
 230 STATIC_ASSERT(sizeof(void *) == SIZEOF_PTR);
 231 STATIC_ASSERT(sizeof(int8_t) * CPU_BITS_PER_CHAR == 8);
 232 STATIC_ASSERT(sizeof(uint8_t) * CPU_BITS_PER_CHAR == 8);
 233 STATIC_ASSERT(sizeof(int16_t) * CPU_BITS_PER_CHAR == 16);
 234 STATIC_ASSERT(sizeof(uint16_t) * CPU_BITS_PER_CHAR == 16);
 235 STATIC_ASSERT(sizeof(int32_t) * CPU_BITS_PER_CHAR == 32);
 236 STATIC_ASSERT(sizeof(uint32_t) * CPU_BITS_PER_CHAR == 32);
 237 #ifdef __HAS_INT64_T__
 238 STATIC_ASSERT(sizeof(int64_t) * CPU_BITS_PER_CHAR == 64);
 239 STATIC_ASSERT(sizeof(uint64_t) * CPU_BITS_PER_CHAR == 64);
 240 #endif
 241 STATIC_ASSERT(sizeof(cpu_stack_t) == SIZEOF_CPUSTACK_T);
 242 STATIC_ASSERT(sizeof(cpu_aligned_stack_t) == SIZEOF_CPUALIGNED_T);
 243 STATIC_ASSERT(sizeof(size_t) == SIZEOF_SIZE_T);
 244
 245
 246 /**
 247  * Macros for hardware access, both direct and via the bit-band region.
 248  */
 249 /*\{*/
 250 #define HWREG(x)   (*((reg32_t *)(x)))
 251 #define HWREGH(x)  (*((reg16_t *)(x)))
 252 #define HWREGB(x)  (*((reg8_t *)(x)))
 253 /*\}*/
 254
 255 #endif /* CPU_TYPES_H */