gdb/rdi-share/params.c

   1 /*
   2  * Copyright (C) 1995 Advanced RISC Machines Limited. All rights reserved.
   3  *
   4  * This software may be freely used, copied, modified, and distributed
   5  * provided that the above copyright notice is preserved in all copies of the
   6  * software.
   7  */
   8
   9 /* -*-C-*-
  10  *
  11  * $Revision$
  12  *     $Date$
  13  *
  14  *
  15  *   Project: ANGEL
  16  *
  17  *     Title: Parameter negotiation utility functions
  18  */
  19
  20 #include "params.h"
  21
  22 #include "endian.h"
  23 #include "logging.h"
  24
  25
  26 /*
  27  * Function: Angel_FindParam
  28  *  Purpose: find the value of a given parameter from a config.
  29  *
  30  * see params.h for details
  31  */
  32 bool Angel_FindParam( ADP_Parameter          type,
  33                       const ParameterConfig *config,
  34                       unsigned int          *value )
  35 {
  36     unsigned int i;
  37
  38     for ( i = 0; i < config->num_parameters; ++i )
  39        if ( config->param[i].type == type )
  40        {
  41            *value = config->param[i].value;
  42            return TRUE;
  43        }
  44
  45     return FALSE;
  46 }
  47
  48
  49 #if !defined(TARGET) || !defined(MINIMAL_ANGEL) || MINIMAL_ANGEL == 0
  50
  51 ParameterList *Angel_FindParamList( const ParameterOptions *options,
  52                                     ADP_Parameter           type )
  53 {
  54     unsigned int i;
  55
  56     for ( i = 0; i < options->num_param_lists; ++i )
  57        if ( options->param_list[i].type == type )
  58           return &options->param_list[i];
  59
  60     return NULL;
  61 }
  62
  63
  64 #if defined(TARGET) || defined(TEST_PARAMS)
  65 /*
  66  * Function: Angel_MatchParams
  67  *  Purpose: find a configuration from the requested options which is
  68  *           the best match from the supported options.
  69  *
  70  * see params.h for details
  71  */
  72 const ParameterConfig *Angel_MatchParams( const ParameterOptions *requested,
  73                                           const ParameterOptions *supported )
  74 {
  75     static Parameter        chosen_params[AP_NUM_PARAMS];
  76     static ParameterConfig  chosen_config = {
  77         AP_NUM_PARAMS,
  78         chosen_params
  79     };
  80     unsigned int i;
  81
  82     ASSERT( requested != NULL, "requested is NULL" );
  83     ASSERT( requested != NULL, "requested is NULL" );
  84     ASSERT( supported->num_param_lists <= AP_NUM_PARAMS, "supp_num too big" );
  85
  86     if ( requested->num_param_lists > supported->num_param_lists )
  87     {
  88         WARN( "req_num exceeds supp_num" );
  89         return NULL;
  90     }
  91
  92     for ( i = 0; i < requested->num_param_lists; ++i )
  93     {
  94         bool           match;
  95         unsigned int   j;
  96
  97         const ParameterList *req_list = &requested->param_list[i];
  98         ADP_Parameter        req_type = req_list->type;
  99         const ParameterList *sup_list = Angel_FindParamList(
 100                                             supported, req_type );
 101
 102         if ( sup_list == NULL )
 103         {
 104 #ifdef ASSERTIONS_ENABLED
 105             __rt_warning( "option %x not supported\n", req_type );
 106 #endif
 107             return NULL;
 108         }
 109
 110         for ( j = 0, match = FALSE;
 111               (j < req_list->num_options) && !match;
 112               ++j
 113             )
 114         {
 115             unsigned int k;
 116
 117             for ( k = 0;
 118                   (k < sup_list->num_options) && !match;
 119                   ++k
 120                 )
 121             {
 122                 if ( req_list->option[j] == sup_list->option[k] )
 123                 {
 124 #ifdef DEBUG
 125                     __rt_info( "chose value %d for option %x\n",
 126                                req_list->option[j], req_type );
 127 #endif
 128                     match = TRUE;
 129                     chosen_config.param[i].type = req_type;
 130                     chosen_config.param[i].value = req_list->option[j];
 131                 }
 132             }
 133         }
 134
 135         if ( !match )
 136         {
 137 #ifdef ASSERTIONS_ENABLED
 138             __rt_warning( "no match found for option %x\n", req_type );
 139 #endif
 140             return NULL;
 141         }
 142     }
 143
 144     chosen_config.num_parameters = i;
 145     INFO( "match succeeded" );
 146     return &chosen_config;
 147 }
 148 #endif /* defined(TARGET) || defined(TEST_PARAMS) */
 149
 150
 151 #if !defined(TARGET) || defined(TEST_PARAMS)
 152 /*
 153  * Function: Angel_StoreParam
 154  *  Purpose: store the value of a given parameter to a config.
 155  *
 156  * see params.h for details
 157  */
 158 bool Angel_StoreParam( ParameterConfig *config,
 159                        ADP_Parameter    type,
 160                        unsigned int     value )
 161 {
 162     unsigned int i;
 163
 164     for ( i = 0; i < config->num_parameters; ++i )
 165        if ( config->param[i].type == type )
 166        {
 167            config->param[i].value = value;
 168            return TRUE;
 169        }
 170
 171     return FALSE;
 172 }
 173 #endif /* !defined(TARGET) || defined(TEST_PARAMS) */
 174
 175
 176 #if defined(TARGET) || defined(LINK_RECOVERY) || defined(TEST_PARAMS)
 177 /*
 178  * Function: Angel_BuildParamConfigMessage
 179  *  Purpose: write a parameter config to a buffer in ADP format.
 180  *
 181  * see params.h for details
 182  */
 183 unsigned int Angel_BuildParamConfigMessage( unsigned char         *buffer,
 184                                             const ParameterConfig *config )
 185 {
 186     unsigned char *start = buffer;
 187     unsigned int i;
 188
 189     PUT32LE( buffer, config->num_parameters );
 190     buffer += sizeof( word );
 191
 192     for ( i = 0; i < config->num_parameters; ++i )
 193     {
 194         PUT32LE( buffer, config->param[i].type );
 195         buffer += sizeof( word );
 196         PUT32LE( buffer, config->param[i].value );
 197         buffer += sizeof( word );
 198     }
 199
 200     return (buffer - start);
 201 }
 202 #endif /* defined(TARGET) || defined(LINK_RECOVERY) || defined(TEST_PARAMS) */
 203
 204
 205 #if !defined(TARGET) || defined(TEST_PARAMS)
 206 /*
 207  * Function: Angel_BuildParamOptionsMessage
 208  *  Purpose: write a parameter Options to a buffer in ADP format.
 209  *
 210  * see params.h for details
 211  */
 212 unsigned int Angel_BuildParamOptionsMessage( unsigned char          *buffer,
 213                                              const ParameterOptions *options )
 214 {
 215     unsigned char *start = buffer;
 216     unsigned int i, j;
 217
 218     PUT32LE( buffer, options->num_param_lists );
 219     buffer += sizeof( word );
 220
 221     for ( i = 0; i < options->num_param_lists; ++i )
 222     {
 223         PUT32LE( buffer, options->param_list[i].type );
 224         buffer += sizeof( word );
 225         PUT32LE( buffer, options->param_list[i].num_options );
 226         buffer += sizeof( word );
 227         for ( j = 0; j < options->param_list[i].num_options; ++j )
 228         {
 229             PUT32LE( buffer, options->param_list[i].option[j] );
 230             buffer += sizeof( word );
 231         }
 232     }
 233
 234     return (buffer - start);
 235 }
 236 #endif /* !defined(TARGET) || defined(TEST_PARAMS) */
 237
 238
 239 #if !defined(TARGET) || defined(LINK_RECOVERY) || defined(TEST_PARAMS)
 240 /*
 241  * Function: Angel_ReadParamConfigMessage
 242  *  Purpose: read a parameter config from a buffer where it is in ADP format.
 243  *
 244  * see params.h for details
 245  */
 246 bool Angel_ReadParamConfigMessage( const unsigned char *buffer,
 247                                    ParameterConfig     *config )
 248 {
 249     unsigned int word;
 250     unsigned int i;
 251
 252     word = GET32LE( buffer );
 253     buffer += sizeof( word );
 254     if ( word > config->num_parameters )
 255     {
 256         WARN( "not enough space" );
 257         return FALSE;
 258     }
 259     config->num_parameters = word;
 260
 261     for ( i = 0; i < config->num_parameters; ++i )
 262     {
 263         config->param[i].type = (ADP_Parameter)GET32LE( buffer );
 264         buffer += sizeof( word );
 265         config->param[i].value = GET32LE( buffer );
 266         buffer += sizeof( word );
 267     }
 268
 269     return TRUE;
 270 }
 271 #endif /* !defined(TARGET) || defined(LINK_RECOVERY) || defined(TEST_PARAMS) */
 272
 273
 274 #if defined(TARGET) || defined(TEST_PARAMS)
 275 /*
 276  * Function: Angel_ReadParamOptionsMessage
 277  *  Purpose: read a parameter options block from a buffer
 278  *             where it is in ADP format.
 279  *
 280  * see params.h for details
 281  */
 282 bool Angel_ReadParamOptionsMessage( const unsigned char *buffer,
 283                                     ParameterOptions    *options )
 284 {
 285     unsigned int word;
 286     unsigned int i, j;
 287
 288     word = GET32LE( buffer );
 289     buffer += sizeof( word );
 290     if ( word > options->num_param_lists )
 291     {
 292         WARN( "not enough space" );
 293         return FALSE;
 294     }
 295     options->num_param_lists = word;
 296
 297     for ( i = 0; i < options->num_param_lists; ++i )
 298     {
 299         ParameterList *list = &options->param_list[i];
 300
 301         list->type = (ADP_Parameter)GET32LE( buffer );
 302         buffer += sizeof( word );
 303         word = GET32LE( buffer );
 304         buffer += sizeof( word );
 305         if ( word > list->num_options )
 306         {
 307             WARN( "not enough list space" );
 308             return FALSE;
 309         }
 310         list->num_options = word;
 311
 312         for ( j = 0; j < list->num_options; ++j )
 313         {
 314             list->option[j] = GET32LE( buffer );
 315             buffer += sizeof( word );
 316         }
 317     }
 318
 319     return TRUE;
 320 }
 321 #endif /* defined(TARGET) || defined(TEST_PARAMS) */
 322
 323 #endif /* !define(TARGET) || !defined(MINIMAL_ANGEL) || MINIMAL_ANGEL == 0 */
 324
 325 /* EOF params.c */