git.sur5r.net Git - cc65/blob - src/common/cpu.c

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                   cpu.c                                   */
   4 /*                                                                           */
   5 /*                            CPU specifications                             */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 2003-2011, Ullrich von Bassewitz                                      */
  10 /*                Roemerstrasse 52                                           */
  11 /*                D-70794 Filderstadt                                        */
  12 /* EMail:         uz@cc65.org                                                */
  13 /*                                                                           */
  14 /*                                                                           */
  15 /* This software is provided 'as-is', without any expressed or implied       */
  16 /* warranty.  In no event will the authors be held liable for any damages    */
  17 /* arising from the use of this software.                                    */
  18 /*                                                                           */
  19 /* Permission is granted to anyone to use this software for any purpose,     */
  20 /* including commercial applications, and to alter it and redistribute it    */
  21 /* freely, subject to the following restrictions:                            */
  22 /*                                                                           */
  23 /* 1. The origin of this software must not be misrepresented; you must not   */
  24 /*    claim that you wrote the original software. If you use this software   */
  25 /*    in a product, an acknowledgment in the product documentation would be  */
  26 /*    appreciated but is not required.                                       */
  27 /* 2. Altered source versions must be plainly marked as such, and must not   */
  28 /*    be misrepresented as being the original software.                      */
  29 /* 3. This notice may not be removed or altered from any source              */
  30 /*    distribution.                                                          */
  31 /*                                                                           */
  32 /*****************************************************************************/
  33
  34
  35
  36 /* common */
  37 #include "addrsize.h"
  38 #include "check.h"
  39 #include "cpu.h"
  40 #include "strutil.h"
  41
  42
  43
  44 /*****************************************************************************/
  45 /*                                   Data                                    */
  46 /*****************************************************************************/
  47
  48
  49
  50 /* CPU used */
  51 cpu_t CPU = CPU_UNKNOWN;
  52
  53 /* Table with target names */
  54 const char* CPUNames[CPU_COUNT] = {
  55     "none",
  56     "6502",
  57     "6502X",
  58     "65SC02",
  59     "65C02",
  60     "65816",
  61     "sweet16",
  62     "huc6280",
  63     "m740",
  64     "4510",
  65 };
  66
  67 /* Tables with CPU instruction sets */
  68 const unsigned CPUIsets[CPU_COUNT] = {
  69     CPU_ISET_NONE,
  70     CPU_ISET_6502,
  71     CPU_ISET_6502 | CPU_ISET_6502X,
  72     CPU_ISET_6502 | CPU_ISET_65SC02,
  73     CPU_ISET_6502 | CPU_ISET_65SC02 | CPU_ISET_65C02,
  74     CPU_ISET_6502 | CPU_ISET_65SC02 | CPU_ISET_65C02 | CPU_ISET_65816,
  75     CPU_ISET_SWEET16,
  76     CPU_ISET_6502 | CPU_ISET_65SC02 | CPU_ISET_65C02 | CPU_ISET_HUC6280,
  77     CPU_ISET_6502 | CPU_ISET_M740,
  78     CPU_ISET_6502 | CPU_ISET_65SC02 | CPU_ISET_65C02 | CPU_ISET_4510,
  79 };
  80
  81
  82
  83 /*****************************************************************************/
  84 /*                                   Code                                    */
  85 /*****************************************************************************/
  86
  87
  88
  89 int ValidAddrSizeForCPU (unsigned char AddrSize)
  90 /* Check if the given address size is valid for the current CPU */
  91 {
  92     switch (AddrSize) {
  93         case ADDR_SIZE_DEFAULT:
  94             /* Always supported */
  95             return 1;
  96
  97         case ADDR_SIZE_ZP:
  98             /* Not supported by None and Sweet16 */
  99             return (CPU != CPU_NONE && CPU != CPU_SWEET16);
 100
 101         case ADDR_SIZE_ABS:
 102             /* Not supported by None */
 103             return (CPU != CPU_NONE);
 104
 105         case ADDR_SIZE_FAR:
 106             /* Only supported by 65816 */
 107             return (CPU == CPU_65816);
 108
 109         case ADDR_SIZE_LONG:
 110             /* Not supported by any CPU */
 111             return 0;
 112
 113         default:
 114             FAIL ("Invalid address size");
 115             /* NOTREACHED */
 116             return 0;
 117     }
 118 }
 119
 120
 121
 122 cpu_t FindCPU (const char* Name)
 123 /* Find a CPU by name and return the target id. CPU_UNKNOWN is returned if
 124 ** the given name is no valid target.
 125 */
 126 {
 127     unsigned I;
 128
 129     /* Check all CPU names */
 130     for (I = 0; I < CPU_COUNT; ++I) {
 131         if (StrCaseCmp (CPUNames [I], Name) == 0) {
 132             return (cpu_t)I;
 133         }
 134     }
 135
 136     /* Not found */
 137     return CPU_UNKNOWN;
 138 }