src/target/register.c

   1 /***************************************************************************
   2  *   Copyright (C) 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 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #include "register.h"
  28 #include "log.h"
  29
  30
  31 struct reg_arch_type *reg_arch_types = NULL;
  32
  33 struct reg* register_get_by_name(struct reg_cache *first,
  34                 const char *name, bool search_all)
  35 {
  36         int i;
  37         struct reg_cache *cache = first;
  38
  39         while (cache)
  40         {
  41                 for (i = 0; i < cache->num_regs; i++)
  42                 {
  43                         if (strcmp(cache->reg_list[i].name, name) == 0)
  44                                 return &(cache->reg_list[i]);
  45                 }
  46
  47                 if (search_all)
  48                         cache = cache->next;
  49                 else
  50                         break;
  51         }
  52
  53         return NULL;
  54 }
  55
  56 struct reg_cache** register_get_last_cache_p(struct reg_cache **first)
  57 {
  58         struct reg_cache **cache_p = first;
  59
  60         if (*cache_p)
  61                 while (*cache_p)
  62                         cache_p = &((*cache_p)->next);
  63         else
  64                 return first;
  65
  66         return cache_p;
  67 }
  68
  69 int register_reg_arch_type(int (*get)(struct reg *reg), int (*set)(struct reg *reg, uint8_t *buf))
  70 {
  71         struct reg_arch_type** arch_type_p = &reg_arch_types;
  72         int id = 0;
  73
  74         if (*arch_type_p)
  75         {
  76                 while (*arch_type_p)
  77                 {
  78                         id = (*arch_type_p)->id;
  79                         arch_type_p = &((*arch_type_p)->next);
  80                 }
  81         }
  82
  83         (*arch_type_p) = malloc(sizeof(struct reg_arch_type));
  84         (*arch_type_p)->id = id + 1;
  85         (*arch_type_p)->set = set;
  86         (*arch_type_p)->get = get;
  87         (*arch_type_p)->next = NULL;
  88
  89         return id + 1;
  90 }
  91
  92 struct reg_arch_type* register_get_arch_type(int id)
  93 {
  94         struct reg_arch_type *arch_type = reg_arch_types;
  95
  96         while (arch_type)
  97         {
  98                 if (arch_type->id == id)
  99                         return arch_type;
 100                 arch_type = arch_type->next;
 101         }
 102         LOG_ERROR("BUG: encountered unregistered arch type 0x%08x", id);
 103         exit(-1);
 104         return NULL;
 105 }
 106
 107 static int register_get_dummy_core_reg(struct reg *reg)
 108 {
 109         return ERROR_OK;
 110 }
 111
 112 static int register_set_dummy_core_reg(struct reg *reg, uint8_t *buf)
 113 {
 114         reg->dirty = 1;
 115         reg->valid = 1;
 116
 117         return ERROR_OK;
 118 }
 119
 120 void register_init_dummy(struct reg *reg)
 121 {
 122         static int dummy_arch_type = -1;
 123         if (dummy_arch_type == -1)
 124                 dummy_arch_type = register_reg_arch_type(register_get_dummy_core_reg, register_set_dummy_core_reg);
 125
 126         reg->arch_type = dummy_arch_type;
 127 }