325 lines
8.5 KiB
C
325 lines
8.5 KiB
C
/*
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* Copyright (C) 1995 Advanced RISC Machines Limited. All rights reserved.
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*
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* This software may be freely used, copied, modified, and distributed
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* provided that the above copyright notice is preserved in all copies of the
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* software.
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*/
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/* -*-C-*-
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*
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* $Revision$
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* $Date$
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*
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*
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* Project: ANGEL
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*
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* Title: Parameter negotiation utility functions
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*/
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#include "params.h"
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#include "endian.h"
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#include "logging.h"
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/*
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* Function: Angel_FindParam
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* Purpose: find the value of a given parameter from a config.
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*
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* see params.h for details
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*/
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bool Angel_FindParam( ADP_Parameter type,
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const ParameterConfig *config,
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unsigned int *value )
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{
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unsigned int i;
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for ( i = 0; i < config->num_parameters; ++i )
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if ( config->param[i].type == type )
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{
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*value = config->param[i].value;
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return TRUE;
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}
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return FALSE;
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}
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#if !defined(TARGET) || !defined(MINIMAL_ANGEL) || MINIMAL_ANGEL == 0
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ParameterList *Angel_FindParamList( const ParameterOptions *options,
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ADP_Parameter type )
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{
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unsigned int i;
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for ( i = 0; i < options->num_param_lists; ++i )
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if ( options->param_list[i].type == type )
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return &options->param_list[i];
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return NULL;
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}
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#if defined(TARGET) || defined(TEST_PARAMS)
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/*
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* Function: Angel_MatchParams
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* Purpose: find a configuration from the requested options which is
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* the best match from the supported options.
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*
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* see params.h for details
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*/
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const ParameterConfig *Angel_MatchParams( const ParameterOptions *requested,
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const ParameterOptions *supported )
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{
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static Parameter chosen_params[AP_NUM_PARAMS];
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static ParameterConfig chosen_config = {
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AP_NUM_PARAMS,
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chosen_params
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};
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unsigned int i;
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ASSERT( requested != NULL, "requested is NULL" );
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ASSERT( requested != NULL, "requested is NULL" );
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ASSERT( supported->num_param_lists <= AP_NUM_PARAMS, "supp_num too big" );
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if ( requested->num_param_lists > supported->num_param_lists )
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{
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WARN( "req_num exceeds supp_num" );
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return NULL;
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}
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for ( i = 0; i < requested->num_param_lists; ++i )
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{
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bool match;
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unsigned int j;
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const ParameterList *req_list = &requested->param_list[i];
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ADP_Parameter req_type = req_list->type;
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const ParameterList *sup_list = Angel_FindParamList(
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supported, req_type );
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if ( sup_list == NULL )
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{
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#ifdef ASSERTIONS_ENABLED
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__rt_warning( "option %x not supported\n", req_type );
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#endif
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return NULL;
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}
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for ( j = 0, match = FALSE;
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(j < req_list->num_options) && !match;
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++j
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)
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{
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unsigned int k;
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for ( k = 0;
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(k < sup_list->num_options) && !match;
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++k
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)
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{
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if ( req_list->option[j] == sup_list->option[k] )
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{
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#ifdef DEBUG
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__rt_info( "chose value %d for option %x\n",
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req_list->option[j], req_type );
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#endif
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match = TRUE;
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chosen_config.param[i].type = req_type;
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chosen_config.param[i].value = req_list->option[j];
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}
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}
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}
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if ( !match )
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{
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#ifdef ASSERTIONS_ENABLED
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__rt_warning( "no match found for option %x\n", req_type );
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#endif
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return NULL;
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}
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}
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chosen_config.num_parameters = i;
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INFO( "match succeeded" );
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return &chosen_config;
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}
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#endif /* defined(TARGET) || defined(TEST_PARAMS) */
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#if !defined(TARGET) || defined(TEST_PARAMS)
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/*
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* Function: Angel_StoreParam
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* Purpose: store the value of a given parameter to a config.
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*
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* see params.h for details
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*/
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bool Angel_StoreParam( ParameterConfig *config,
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ADP_Parameter type,
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unsigned int value )
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{
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unsigned int i;
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for ( i = 0; i < config->num_parameters; ++i )
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if ( config->param[i].type == type )
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{
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config->param[i].value = value;
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return TRUE;
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}
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return FALSE;
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}
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#endif /* !defined(TARGET) || defined(TEST_PARAMS) */
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#if defined(TARGET) || defined(LINK_RECOVERY) || defined(TEST_PARAMS)
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/*
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* Function: Angel_BuildParamConfigMessage
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* Purpose: write a parameter config to a buffer in ADP format.
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*
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* see params.h for details
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*/
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unsigned int Angel_BuildParamConfigMessage( unsigned char *buffer,
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const ParameterConfig *config )
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{
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unsigned char *start = buffer;
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unsigned int i;
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PUT32LE( buffer, config->num_parameters );
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buffer += sizeof( word );
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for ( i = 0; i < config->num_parameters; ++i )
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{
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PUT32LE( buffer, config->param[i].type );
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buffer += sizeof( word );
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PUT32LE( buffer, config->param[i].value );
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buffer += sizeof( word );
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}
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return (buffer - start);
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}
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#endif /* defined(TARGET) || defined(LINK_RECOVERY) || defined(TEST_PARAMS) */
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#if !defined(TARGET) || defined(TEST_PARAMS)
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/*
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* Function: Angel_BuildParamOptionsMessage
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* Purpose: write a parameter Options to a buffer in ADP format.
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*
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* see params.h for details
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*/
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unsigned int Angel_BuildParamOptionsMessage( unsigned char *buffer,
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const ParameterOptions *options )
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{
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unsigned char *start = buffer;
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unsigned int i, j;
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PUT32LE( buffer, options->num_param_lists );
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buffer += sizeof( word );
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for ( i = 0; i < options->num_param_lists; ++i )
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{
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PUT32LE( buffer, options->param_list[i].type );
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buffer += sizeof( word );
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PUT32LE( buffer, options->param_list[i].num_options );
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buffer += sizeof( word );
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for ( j = 0; j < options->param_list[i].num_options; ++j )
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{
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PUT32LE( buffer, options->param_list[i].option[j] );
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buffer += sizeof( word );
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}
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}
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return (buffer - start);
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}
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#endif /* !defined(TARGET) || defined(TEST_PARAMS) */
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#if !defined(TARGET) || defined(LINK_RECOVERY) || defined(TEST_PARAMS)
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/*
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* Function: Angel_ReadParamConfigMessage
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* Purpose: read a parameter config from a buffer where it is in ADP format.
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*
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* see params.h for details
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*/
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bool Angel_ReadParamConfigMessage( const unsigned char *buffer,
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ParameterConfig *config )
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{
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unsigned int word;
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unsigned int i;
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word = GET32LE( buffer );
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buffer += sizeof( word );
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if ( word > config->num_parameters )
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{
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WARN( "not enough space" );
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return FALSE;
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}
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config->num_parameters = word;
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for ( i = 0; i < config->num_parameters; ++i )
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{
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config->param[i].type = (ADP_Parameter)GET32LE( buffer );
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buffer += sizeof( word );
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config->param[i].value = GET32LE( buffer );
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buffer += sizeof( word );
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}
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return TRUE;
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}
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#endif /* !defined(TARGET) || defined(LINK_RECOVERY) || defined(TEST_PARAMS) */
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#if defined(TARGET) || defined(TEST_PARAMS)
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/*
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* Function: Angel_ReadParamOptionsMessage
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* Purpose: read a parameter options block from a buffer
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* where it is in ADP format.
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*
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* see params.h for details
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*/
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bool Angel_ReadParamOptionsMessage( const unsigned char *buffer,
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ParameterOptions *options )
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{
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unsigned int word;
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unsigned int i, j;
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word = GET32LE( buffer );
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buffer += sizeof( word );
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if ( word > options->num_param_lists )
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{
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WARN( "not enough space" );
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return FALSE;
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}
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options->num_param_lists = word;
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for ( i = 0; i < options->num_param_lists; ++i )
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{
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ParameterList *list = &options->param_list[i];
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list->type = (ADP_Parameter)GET32LE( buffer );
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buffer += sizeof( word );
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word = GET32LE( buffer );
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buffer += sizeof( word );
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if ( word > list->num_options )
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{
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WARN( "not enough list space" );
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return FALSE;
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}
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list->num_options = word;
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for ( j = 0; j < list->num_options; ++j )
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{
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list->option[j] = GET32LE( buffer );
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buffer += sizeof( word );
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}
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}
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return TRUE;
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}
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#endif /* defined(TARGET) || defined(TEST_PARAMS) */
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#endif /* !define(TARGET) || !defined(MINIMAL_ANGEL) || MINIMAL_ANGEL == 0 */
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/* EOF params.c */
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