source: soft/giet_vm/xml/xml_parser.c @ 229

///////////////////////////////////////////////////////////////////////////////////////
// File     : xml_parser.c
// Date     : 14/04/2012
// Author   : alain greiner
// Copyright (c) UPMC-LIP6
///////////////////////////////////////////////////////////////////////////////////////
// This program translate a "map.xml" source file to a binary file "map.bin" that 
// can be directly loaded in the boot ROM and used by the GIET-VM operating system.
//
// This map.xml file contains :
// 1) the multi-cluster/multi-processors hardware architecture description
// 2) the various multi-threaded software applications
// 3) the mapping directives bor both the tasks and the virtual segments.
// The corresponding C structures are defined in the "mapping_info.h" file.
// 
// This program also generates the "hard_config.h" and the "giet_vsegs.ld" files,
// required  to compile the GIET-VM code. 
///////////////////////////////////////////////////////////////////////////////////////

#include  <stdlib.h>
#include  <fcntl.h>
#include  <sys/types.h>
#include  <sys/stat.h>
#include  <unistd.h>
#include  <stdio.h>
#include  <string.h>
#include  <assert.h>
#include  <libxml/xmlreader.h>
#include  <mapping_info.h>
#include  <irq_handler.h>

#define MAX_CLUSTERS   1024
#define MAX_PSEGS      4096
#define MAX_VSPACES    1024
#define MAX_TASKS      4096
#define MAX_MWMRS      4096
#define MAX_VSEGS      4096
#define MAX_VOBJS      8192
#define MAX_PROCS      1024
#define MAX_IRQS       8192
#define MAX_COPROCS    4096
#define MAX_CP_PORTS   8192
#define MAX_PERIPHS    8192

#define XML_PARSER_DEBUG  0

///////////////////////////////////////////////////////////////////////////////////
//     global variables used to store and index the data structures
///////////////////////////////////////////////////////////////////////////////////

mapping_header_t * header;
mapping_cluster_t * cluster[MAX_CLUSTERS];  // cluster array
mapping_pseg_t * pseg[MAX_PSEGS];           // pseg array
mapping_vspace_t * vspace[MAX_VSPACES];     // vspace array
mapping_vseg_t * vseg[MAX_VSEGS];           // vseg array
mapping_vobj_t * vobj[MAX_VOBJS];           // vobj array
mapping_task_t * task[MAX_TASKS];           // task array
mapping_proc_t * proc[MAX_PROCS];           // proc array
mapping_irq_t * irq[MAX_IRQS];              // irq array
mapping_coproc_t * coproc[MAX_COPROCS];     // coproc array
mapping_cp_port_t * cp_port[MAX_CP_PORTS];  // coproc port array
mapping_periph_t * periph[MAX_PERIPHS];     // peripheral array

// Index for the various arrays

unsigned int cluster_index  = 0;
unsigned int vspace_index = 0;
unsigned int global_index = 0;
unsigned int pseg_index = 0;        

unsigned int proc_index = 0;
unsigned int proc_loc_index = 0;

unsigned int irq_index = 0;
unsigned int irq_loc_index  = 0;

unsigned int coproc_index = 0;
unsigned int coproc_loc_index = 0;

unsigned int cp_port_index = 0;
unsigned int cp_port_loc_index = 0;

unsigned int periph_index = 0;
unsigned int periph_loc_index = 0;

unsigned int vseg_index = 0;
unsigned int vseg_loc_index = 0;

unsigned int task_index = 0;
unsigned int task_loc_index = 0;

unsigned int vobj_index = 0;
unsigned int vobj_loc_index = 0;
unsigned int vobj_count = 0;


/////////////////////////
// found peripheral
/////////////////////////
char found_timer = 0;
char found_icu = 0;
char found_xicu = 0;
char found_dma = 0;


//////////////////////////////////
//needed to generate map_config.ld
//////////////////////////////////
unsigned int cluster_y            = 0;
unsigned int cluster_x            = 0; 
unsigned int nb_proc_max          = 0; // max number of processors per cluster 
unsigned int nb_timer_channel_max = 0; // max number of user timer
unsigned int nb_dma_channel_max   = 0;
unsigned int nb_tty_channel       = 0;
unsigned int nb_ioc_channel       = 0;
unsigned int nb_nic_channel       = 0;
unsigned int io_mmu_active        = 0;
unsigned int use_xicu             = 0xFFFFFFFF;


//////////////////////////////////
//needed to generate giet_vseg.ld
//////////////////////////////////

//kernel and boot code
unsigned int kernel_code_base    = 0x80000000; /* kernel code */
unsigned int kernel_data_base    = 0x80010000; /* system cacheable data */
unsigned int kernel_uncdata_base = 0x80080000; /* system uncacheable data */
unsigned int kernel_init_base    = 0x80090000; /* system init entry */ 

unsigned int boot_code_base      = 0xBFC00000; /* boot code */
unsigned int boot_stack_base     = 0xBFC08000; /* boot temporary stack */ 
unsigned int boot_mapping_base   = 0xBFC0C000; /* mapping_info blob */

//periphs
unsigned int tim_base_offset = 0xFFFFFFFF;
unsigned int tty_base_offset = 0xFFFFFFFF;
unsigned int dma_base_offset = 0xFFFFFFFF;
unsigned int ioc_base_offset = 0xFFFFFFFF;
unsigned int nic_base_offset = 0xFFFFFFFF;
unsigned int fbf_base_offset = 0xFFFFFFFF;
unsigned int icu_base_offset = 0xFFFFFFFF;
unsigned int gcd_base_offset = 0xFFFFFFFF;
unsigned int iob_base_offset = 0xFFFFFFFF;


//////////////////////////////////////////////////////////////////////
// This arrray is useful to build a temporary list of vobj references. 
// The struct vobj_ref_s is formed by a vspace_name and a vobj_name.
// This array is used to set the attribute vobj_id of a cp_port
// once all the vspace have been parsed.
/////////////////////////////////////////////////////////////////////
typedef struct vobj_ref_s {
    char vspace_name[32];
    char vobj_name[32];
} vobj_ref_t;

vobj_ref_t * cp_port_vobj_ref[MAX_CP_PORTS];    


//////////////////////////////////////////////////
unsigned int getIntValue(xmlTextReaderPtr reader, const char * attributeName, unsigned int * ok) {
    unsigned int value = 0;
    unsigned int i;
    char c;

    char * string = (char *) xmlTextReaderGetAttribute(reader, (const xmlChar *) attributeName);

    if (string == NULL) {
        // missing argument
        *ok = 0;
        return 0;
    }
    else {
        if ((string[0] == '0') && ((string[1] == 'x') || (string[1] == 'X'))) {
            // Hexa
            for (i = 2 ; (string[i] != 0) && (i < 10) ; i++) {
                c = string[i];
                if      ((c >= '0') && (c <= '9')) { value = (value << 4) + string[i] - 48; }
                else if ((c >= 'a') && (c <= 'f')) { value = (value << 4) + string[i] - 87; }
                else if ((c >= 'A') && (c <= 'F')) { value = (value << 4) + string[i] - 55; }
                else {
                    *ok = 0;
                    return 0;
                }
            }
        }
        else {
            // Decimal
            for (i = 0; (string[i] != 0) && (i < 9); i++) {
                c = string[i];
                if ((c >= '0') && (c <= '9')) value = (value * 10) + string[i] - 48;
                else {
                    *ok = 0;
                    return 0;
                }
            }
        }
        *ok = 1;
        return value; 
    }
} // end getIntValue()


///////////////////////////////////////////////
char * getStringValue(xmlTextReaderPtr reader, const char * attributeName, unsigned int * ok) {
    char * string = (char *) xmlTextReaderGetAttribute(reader, (const xmlChar *) attributeName);


    if (string == NULL) {
        // missing argument
        *ok = 0;
        return NULL;
    }
    else {
        //we read only string smaller than 32 byte
        if (strlen(string) > 32) {
            printf("[XML ERROR] all strings must be less than 32 bytes\n");
            exit(1);
        }

        *ok = 1;
        return string;
    }
} // end getStringValue()


///////////////////////////////////////
int getPsegId(unsigned int cluster_id, char * pseg_name) {
    unsigned int pseg_id;
    unsigned int pseg_min = cluster[cluster_id]->pseg_offset;
    unsigned int pseg_max = pseg_min + cluster[cluster_id]->psegs;

    for (pseg_id = pseg_min; pseg_id < pseg_max; pseg_id++) {
        if (strcmp(pseg[pseg_id]->name, pseg_name) == 0) {
            return pseg_id;
        }
    }
    return -1;
}


////////////////////////////////////////////
int getVspaceId(char * vspace_name) {
    unsigned int vspace_id;

    for (vspace_id = 0; vspace_id < vspace_index; vspace_id++) {
        if (!strcmp(vspace[vspace_id]->name, vspace_name)) {
            return vspace_id;
        }
    }
    return -1;
}


////////////////////////////////////////////
int getVobjLocId(unsigned int vspace_id, char * vobj_name, unsigned int vspace_max) {
    unsigned int vobj_id;
    unsigned int vobj_min = vspace[vspace_id]->vobj_offset;
    unsigned int vobj_max = vobj_min + vspace_max;

    for (vobj_id = vobj_min; vobj_id < vobj_max; vobj_id++) {
        if (strcmp(vobj[vobj_id]->name, vobj_name) == 0) {
            return (vobj_id - vobj_min);
        }
    }
    return -1;
}


/////////////////////////////////////////
void taskNode(xmlTextReaderPtr reader) {
    unsigned int ok;
    unsigned int value;
    char * str;

    if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT) {
        return;
    }

    if (task_index >= MAX_TASKS) {
        printf("[XML ERROR] The number of tasks is larger than %d\n", MAX_TASKS);
    }

#if XML_PARSER_DEBUG
    printf("   task %d\n", task_loc_index);
#endif

    task[task_index] = (mapping_task_t *) malloc(sizeof(mapping_task_t));

    ////////// get name attribute
    str = getStringValue(reader, "name", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("      name = %s\n", str);
#endif
        strncpy( task[task_index]->name, str, 31 );
    }
    else {
        printf("[XML ERROR] illegal or missing <name> attribute for task (%d,%d)\n", 
                vspace_index, task_loc_index);
        exit(1);
    }

    ///////// get clusterid attribute
    value = getIntValue(reader, "clusterid", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("      clusterid = %x\n", value);
#endif
        if (value >= header->clusters) {
            printf("[XML ERROR] <clusterid> too large for task (%d,%d)\n",
                    vspace_index, task_loc_index);
            exit(1);
        }
        task[task_index]->clusterid = value;
    }  
    else {
        printf("[XML ERROR] illegal or missing <clusterid> attribute for task (%d,%d)\n",
                vspace_index, task_loc_index);
        exit(1);
    }

    ////////// get proclocid attribute
    value = getIntValue(reader, "proclocid", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("      proclocid = %x\n", value);
#endif
        if (value >= cluster[task[task_index]->clusterid]->procs) {
            printf("[XML ERROR] <proclocid> too large for task (%d,%d)\n",
                    vspace_index, task_loc_index);
            exit(1);
        }
        task[task_index]->proclocid = value;
    }  
    else {
        printf("[XML ERROR] illegal or missing <locprocid> attribute for task (%d,%d)\n", 
                vspace_index, task_loc_index);
        exit(1);
    }

    ////////// get stackname attribute
    str = getStringValue(reader, "stackname" , &ok);
    if (ok) {
        int index = getVobjLocId(vspace_index, str , vobj_loc_index);
        if (index >= 0) {
#if XML_PARSER_DEBUG
            printf("      stackname = %s\n", str);
            printf("      stackid   = %d\n", index);
#endif
            task[task_index]->vobjlocid = index;
        }
        else {
            printf("[XML ERROR] illegal or missing <stackname> for task (%d,%d)\n", 
                    vspace_index, task_loc_index);
            exit(1);
        }
    }  
    else {
        printf("[XML ERROR] illegal or missing <stackname> for task (%d,%d)\n", 
                vspace_index, task_loc_index);
        exit(1);
    }

    ////////// get startid  attribute
    value = getIntValue(reader, "startid", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("      startid = %x\n", value);
#endif
        task[task_index]->startid = value;
    }  
    else {
        printf("[XML ERROR] illegal or missing <startid> attribute for task (%d,%d)\n", 
                vspace_index, task_loc_index);
        exit(1);
    }

    /////////// get usetty  attribute (optionnal : 0 if missing)
    value = getIntValue(reader, "usetty", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("      usetty = %x\n", value);
#endif
        task[task_index]->use_tty = value;
    }  
    else {
        task[task_index]->use_tty = 0;
    }

    /////////// get usenic  attribute (optionnal : 0 if missing)
    value = getIntValue(reader, "usenic", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("      usenic = %x\n", value);
#endif
        task[task_index]->use_nic = value;
    }  
    else {
        task[task_index]->use_nic = 0;
    }

    /////////// get usetimer attribute (optionnal : 0 if missing)
    value = getIntValue(reader, "usetimer", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("      usetimer = %x\n", value);
#endif
        task[task_index]->use_timer = value;
    }  
    else {
        task[task_index]->use_timer = 0;
    }

    /////////// get usefbdma  attribute (optionnal : 0 if missing)
    value = getIntValue(reader, "usefbdma", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("      usefbdma = %x\n", value);
#endif
        task[task_index]->use_fbdma = value;
    }
    else {
        task[task_index]->use_fbdma = 0;
    }

    task_index++;
    task_loc_index++;
} // end taskNode()


//////////////////////////////////////////
void vobjNode(xmlTextReaderPtr reader) {
    unsigned int ok;
    unsigned int value;
    char * str;

    if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT) {
        return;
    }

    if (vobj_index >= MAX_VOBJS) {
        printf("[XML ERROR] The number of vobjs is larger than %d\n", MAX_VSEGS);
        exit(1);
    }

#if XML_PARSER_DEBUG
    printf("      vobj %d\n", vobj_loc_index);
#endif

    vobj[vobj_index] = (mapping_vobj_t *) malloc(sizeof(mapping_vobj_t));

    ///////// get name attribute
    str = getStringValue(reader, "name", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("        name = %s\n", str);
#endif
        strncpy(vobj[vobj_index]->name, str, 31);
    }
    else {
        printf("[XML ERROR] illegal or missing <name> attribute for vobj (%d,%d)\n", 
                vseg_index, vobj_loc_index);
        exit(1);
    }

    //////// get type attribute
    str = getStringValue(reader, "type", &ok);
#if XML_PARSER_DEBUG
    printf("        type = %s\n", str);
#endif
    if (ok && (strcmp(str, "ELF") == 0)) {
        vobj[vobj_index]->type = VOBJ_TYPE_ELF;

        //check that this vobj is the first in vseg
        if (vobj_count != 0) {
            printf("[XML ERROR] an ELF vobj must be alone in a vseg (%d,%d)\n", 
                    vspace_index, vobj_loc_index);
            exit(1);
        }
    }
    else if (ok && (strcmp(str, "BLOB")     == 0)) { vobj[vobj_index]->type = VOBJ_TYPE_BLOB; }
    else if (ok && (strcmp(str, "PTAB")     == 0)) { vobj[vobj_index]->type = VOBJ_TYPE_PTAB; }
    else if (ok && (strcmp(str, "PERI")     == 0)) { vobj[vobj_index]->type = VOBJ_TYPE_PERI; }
    else if (ok && (strcmp(str, "MWMR")     == 0)) { vobj[vobj_index]->type = VOBJ_TYPE_MWMR; }
    else if (ok && (strcmp(str, "LOCK")     == 0)) { vobj[vobj_index]->type = VOBJ_TYPE_LOCK; }
    else if (ok && (strcmp(str, "BUFFER")   == 0)) { vobj[vobj_index]->type = VOBJ_TYPE_BUFFER; }
    else if (ok && (strcmp(str, "BARRIER")  == 0)) { vobj[vobj_index]->type = VOBJ_TYPE_BARRIER; }
    else if (ok && (strcmp(str, "CONST")    == 0)) { vobj[vobj_index]->type = VOBJ_TYPE_CONST; }
    else if (ok && (strcmp(str, "MEMSPACE") == 0)) { vobj[vobj_index]->type = VOBJ_TYPE_MEMSPACE; }
    else {
        printf("[XML ERROR] illegal or missing <type> attribute for vobj (%d,%d)\n", 
                vspace_index, vobj_loc_index);
        exit(1);
    }

    ////////// get length attribute 
    value = getIntValue(reader, "length", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("        length = %d\n", value);
#endif
        vobj[vobj_index]->length = value;
    }  
    else {
        printf("[XML ERROR] illegal or missing <length> attribute for vobj (%d,%d)\n", 
                vspace_index, vobj_loc_index);
        exit(1);
    }

    ////////// get align attribute (optional : 0 if missing)
    value = getIntValue(reader, "align", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("        align = %d\n", value);
#endif
        vobj[vobj_index]->align = value;
    }  
    else {
        vobj[vobj_index]->align = 0;
    }

    ////////// get binpath attribute (optional : '\0' if missing)
    str = getStringValue(reader, "binpath", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("        binpath = %s\n", str);
#endif
        strncpy(vobj[vobj_index]->binpath, str, 63);
    }  
    else {
        vobj[vobj_index]->binpath[0] = '\0';
    }

    ////////// get init attribute (mandatory for mwmr and barrier)
    value = getIntValue(reader, "init", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("        init  = %d\n", value);
#endif
        vobj[vobj_index]->init = value;
    }  
    else {
        if ((vobj[vobj_index]->type == VOBJ_TYPE_MWMR) || 
                (vobj[vobj_index]->type == VOBJ_TYPE_BARRIER) ||
                (vobj[vobj_index]->type == VOBJ_TYPE_CONST)) {
            printf("[XML ERROR] illegal or missing <value> attribute for vobj (%d,%d). \
                    All MWMR or BARRIER vobj must have a init value \n", 
                    vspace_index, vobj_loc_index);
            exit(1);
        }
        vobj[vobj_index]->init = 0;
    }

    vobj_index++;
    vobj_count++;
    vobj_loc_index++;
} // end vobjNode()


//////////////////////////////////////////
void vsegNode(xmlTextReaderPtr reader) {
    unsigned int ok;
    unsigned int value;
    char * str;

    vobj_count = 0;

    if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT) {
        return;
    }

    if (vseg_index >= MAX_VSEGS) {
        printf("[XML ERROR] The number of vsegs is larger than %d\n", MAX_VSEGS);
        exit(1);
    }

#if XML_PARSER_DEBUG
    printf("    vseg %d\n", vseg_loc_index);
#endif

    vseg[vseg_index] = (mapping_vseg_t *) malloc(sizeof(mapping_vseg_t));

    ////////// set vobj_offset attributes
    vseg[vseg_index]->vobj_offset = vobj_index;
#if XML_PARSER_DEBUG
    printf("      vobj_offset = %d\n", vobj_index);
#endif

    ///////// get name attribute
    str = getStringValue(reader, "name", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("      name = %s\n", str);
#endif
        strncpy( vseg[vseg_index]->name, str, 31);
    }
    else {
        printf("[XML ERROR] illegal or missing <name> attribute for vseg (%d,%d)\n", 
                vspace_index, vseg_loc_index);
        exit(1);
    }

    ////////// get ident attribute (optional : 0 if missing)
    value = getIntValue(reader, "ident", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("      ident = %d\n", value);
#endif
        vseg[vseg_index]->ident = value;
    }  
    else {
        vseg[vseg_index]->ident = 0;
    }

    /////////// get vbase attribute
    value = getIntValue(reader, "vbase", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("      vbase = 0x%x\n", value);
#endif
        vseg[vseg_index]->vbase = value;
    }
    else {
        printf("[XML ERROR] illegal or missing <vbase> attribute for vseg (%d,%d)\n", 
                vspace_index, vseg_loc_index);
        exit(1);
    }

    ////////// get clusterid and psegname attributes
    value = getIntValue(reader, "clusterid", &ok);
    if (ok == 0) {
        printf("[XML ERROR] illegal or missing <clusterid> for vseg %d\n", 
                vseg_loc_index);
        exit(1);
    }
    str = getStringValue(reader, "psegname", &ok);
    if (ok == 0) {
        printf("[XML ERROR] illegal or missing <psegname> for vseg %d\n", 
                vseg_loc_index);
        exit(1);
    }

    /////////// set psegid field
    int index = getPsegId(value, str);
    if (index >= 0) {
#if XML_PARSER_DEBUG
        printf("      clusterid = %d\n", value);
        printf("      psegname  = %s\n", str);
        printf("      psegid    = %d\n", index);
#endif
        vseg[vseg_index]->psegid = index;
    }
    else {
        printf("[XML ERROR] pseg not found for vseg %d / clusterid = %d / psegname = %s\n", 
                vseg_loc_index, value, str );
        exit(1);
    }  

    //////// get mode attribute
    str = getStringValue(reader, "mode", &ok);
#if XML_PARSER_DEBUG
    printf("      mode = %s\n", str);
#endif
    if      (ok && (strcmp(str, "CXWU") == 0)) { vseg[vseg_index]->mode = 0xF; }
    else if (ok && (strcmp(str, "CXW_") == 0)) { vseg[vseg_index]->mode = 0xE; }
    else if (ok && (strcmp(str, "CX_U") == 0)) { vseg[vseg_index]->mode = 0xD; }
    else if (ok && (strcmp(str, "CX__") == 0)) { vseg[vseg_index]->mode = 0xC; }
    else if (ok && (strcmp(str, "C_WU") == 0)) { vseg[vseg_index]->mode = 0xB; }
    else if (ok && (strcmp(str, "C_W_") == 0)) { vseg[vseg_index]->mode = 0xA; }
    else if (ok && (strcmp(str, "C__U") == 0)) { vseg[vseg_index]->mode = 0x9; }
    else if (ok && (strcmp(str, "C___") == 0)) { vseg[vseg_index]->mode = 0x8; }
    else if (ok && (strcmp(str, "_XWU") == 0)) { vseg[vseg_index]->mode = 0x7; }
    else if (ok && (strcmp(str, "_XW_") == 0)) { vseg[vseg_index]->mode = 0x6; }
    else if (ok && (strcmp(str, "_X_U") == 0)) { vseg[vseg_index]->mode = 0x5; }
    else if (ok && (strcmp(str, "_X__") == 0)) { vseg[vseg_index]->mode = 0x4; }
    else if (ok && (strcmp(str, "__WU") == 0)) { vseg[vseg_index]->mode = 0x3; }
    else if (ok && (strcmp(str, "__W_") == 0)) { vseg[vseg_index]->mode = 0x2; }
    else if (ok && (strcmp(str, "___U") == 0)) { vseg[vseg_index]->mode = 0x1; }
    else if (ok && (strcmp(str, "____") == 0)) { vseg[vseg_index]->mode = 0x0; }
    else {
        printf("[XML ERROR] illegal or missing <mode> attribute for vseg (%d,%d)\n", 
                vspace_index, vseg_loc_index);
        exit(1);
    }

    ////////// get vobjs in vseg
    int status = xmlTextReaderRead(reader);
    while (status == 1) {
        const char * tag = (const char *) xmlTextReaderConstName(reader);

        if (strcmp(tag, "vobj")     == 0 ) {
            vobjNode(reader);
        }
        else if (strcmp(tag, "#text"  )  == 0 ) { }
        else if (strcmp(tag, "#comment") == 0 ) { }
        else if (strcmp(tag, "vseg")     == 0 ) {
            vseg[vseg_index]->vobjs = vobj_count;
            vseg_index++;
            vseg_loc_index++;
            return;
        }
        else {
            printf("[XML ERROR] Unknown tag %s", tag);
            exit(1);
        }
        status = xmlTextReaderRead (reader);
    }
} // end vsegNode()


//////////////////////////////////////////
void vspaceNode(xmlTextReaderPtr reader) {
    char * str;
    unsigned int ok;

    vobj_loc_index = 0;
    vseg_loc_index = 0;
    task_loc_index = 0;

    if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT) {
        return;
    }

    // checking source file consistency
    if (vspace_index >= header->vspaces) {
        printf("[XML ERROR] The vspace index is too large : %d\n", 
                vspace_index);
        exit(1);
    }

#if XML_PARSER_DEBUG
    printf("\n  vspace %d\n", vspace_index);
#endif

    vspace[vspace_index] = (mapping_vspace_t *) malloc(sizeof(mapping_vspace_t));

    ////////// get name attribute
    str = getStringValue(reader, "name", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("  name = %s\n", str);
#endif
        strncpy(vspace[vspace_index]->name, str, 31);
    }
    else {
        printf("[XML ERROR] illegal or missing <name> attribute for vspace %d\n", 
                vspace_index);
        exit(1);
    }

    ////////// set vseg_offset and task_offset attributes
    vspace[vspace_index]->vseg_offset = vseg_index;
    vspace[vspace_index]->vobj_offset = vobj_index;
    vspace[vspace_index]->task_offset = task_index;

#if XML_PARSER_DEBUG
    printf("  vseg_offset = %d\n", vseg_index);
    printf("  vobj_offset = %d\n", vobj_index);
    printf("  task_offset = %d\n", task_index);
#endif

    ////////// get startname attribute
    str = getStringValue(reader, "startname", &ok);
    if (ok) {
        //used after parsing the vobjs
    }
    else {
        printf("[XML ERROR] illegal or missing <startname> attribute for vspace %s\n", 
                vspace[vspace_index]->name);
        exit(1);
    }

    int status = xmlTextReaderRead(reader);
    while (status == 1) {
        const char * tag = (const char *) xmlTextReaderConstName(reader);

        if (strcmp(tag, "vseg")     == 0 ) {
            vsegNode(reader);
        }
        else if (strcmp(tag, "task")     == 0 ) {
            taskNode(reader);
        }
        else if (strcmp(tag, "#text")    == 0 ) { }
        else if (strcmp(tag, "#comment") == 0 ) { }
        else if (strcmp(tag, "vspace")   == 0 ) {
            vspace[vspace_index]->vobjs = vobj_loc_index; 
            vspace[vspace_index]->tasks = task_loc_index ;
            vspace[vspace_index]->vsegs = vseg_loc_index ;

            // get index of the vobj containing the start vector
            int index = getVobjLocId(vspace_index, str , vobj_loc_index);
            if (index == -1) {
                printf("[XML ERROR] vobj containing start vector not found in vspace %s\n",
                        vspace[vspace_index]->name);
                exit(-1);
            }
            else {
                vspace[vspace_index]->start_offset = index;
#if XML_PARSER_DEBUG
                printf("      startname = %s\n", str);
                printf("      startid   = %d\n", index);
                printf("  end vspace %d\n\n", vspace_index);
#endif
            }

            // checking startid values for all tasks in vspace
            int task_id;
            int task_min = vspace[vspace_index]->task_offset;
            int task_max = task_min + vspace[vspace_index]->tasks; 
            for (task_id = task_min; task_id < task_max; task_id++) {
                if (task[task_id]->startid >= vspace[vspace_index]->tasks) {
                    printf("[XML ERROR] <startid> too large for task (%d,%d)\n", 
                            vspace_index, task_id );
                    exit(1);
                }
            }

            vspace_index++;
            return;
        }
        else {
            printf("[XML ERROR] Unknown tag %s", tag);
            exit(1);
        }
        status = xmlTextReaderRead(reader);
    }
} // end vspaceNode()


///////////////////////////////////////////
void cpPortNode(xmlTextReaderPtr reader) {
    char * str;
    unsigned int ok;

    if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT) {
        return;
    }

    if (cp_port_index >= MAX_CP_PORTS) {
        printf("[XML ERROR] The number of ports (for coprocs) is larger than %d\n", MAX_CP_PORTS);
    }

#if XML_PARSER_DEBUG
    printf("\n  port %d\n", cp_port_index);
#endif

    cp_port[cp_port_index] = (mapping_cp_port_t *) malloc(sizeof(mapping_cp_port_t));
    cp_port_vobj_ref[cp_port_index] = (vobj_ref_t *) malloc(sizeof(vobj_ref_t));



    ///////// get direction attribute
    str = getStringValue(reader, "direction", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("      direction = %s\n", str);
#endif
        if (strcmp(str, "TO_COPROC")   ==  0) {
            cp_port[cp_port_index]->direction = PORT_TO_COPROC;
        }
        else if (strcmp(str, "FROM_COPROC") ==  0) {
            cp_port[cp_port_index]->direction = PORT_FROM_COPROC;
        }
        else {
            printf("[XML ERROR] illegal <direction> for cp_port %d in cluster %d\n",
                    cp_port_index, cluster_index);
            exit(1);
        }
    }  
    else {
        printf("[XML ERROR] missing <direction> for cp_port %d in cluster %d\n",
                cp_port_index, cluster_index);
        exit(1);
    }

    /////////// get vspacename attribute 
    str = getStringValue(reader, "vspacename", &ok);
#if XML_PARSER_DEBUG
    printf("      vspacename = %s\n", str);
#endif
    if (ok) {
        strncpy(cp_port_vobj_ref[cp_port_index]->vspace_name, str, 31);
    }
    else {
        printf("[XML ERROR] missing <vspacename> for cp_port %d in cluster %d\n",
                cp_port_index, cluster_index);
        exit(1);
    }

    /////////// get vobjname attribute 
    str = getStringValue(reader, "vobjname", &ok);
#if XML_PARSER_DEBUG
    printf("      vobjname = %s\n", str);
#endif
    if (ok) {
        strncpy(cp_port_vobj_ref[cp_port_index]->vobj_name, str, 31);
    }
    else {
        printf("[XML ERROR] missing <vobjname> for cp_port %d in cluster %d\n",
                cp_port_index, cluster_index);
        exit(1);
    }

    cp_port_index++;
    cp_port_loc_index++;

} // end cpPortNode()


///////////////////////////////////////////
void periphNode(xmlTextReaderPtr reader) {
    char * str;
    unsigned int value;
    unsigned int ok;

    if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT) {
        return;
    }

    if (periph_index >= MAX_PERIPHS) {
        printf("[XML ERROR] The number of periphs is larger than %d\n", MAX_PERIPHS);
    }

#if XML_PARSER_DEBUG
    printf("\n  periph %d\n", periph_index);
#endif

    periph[periph_index] = (mapping_periph_t *) malloc(sizeof(mapping_periph_t));


    ///////// get channels attribute (optionnal : 1 if missing)
    value = getIntValue(reader, "channels", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("      channels = %d\n", value);
#endif
        periph[periph_index]->channels = value;
    }
    else {
        periph[periph_index]->channels = 1;
    }

    /////////// get psegname attribute 
    str = getStringValue(reader, "psegname", &ok);
    if (ok == 0) {
        printf("[XML ERROR] illegal or missing <psegname> for coproc %d in cluster %d\n", 
                coproc_index, cluster_index);
        exit(1);
    }

    /////////// set psegid attribute
    int index = getPsegId(cluster_index, str);
    if (index >= 0) {
#if XML_PARSER_DEBUG
        printf("      clusterid = %d\n", cluster_index);
        printf("      psegname  = %s\n", str);
        printf("      psegid    = %d\n", index);
#endif
        periph[periph_index]->psegid = index;
        assert(pseg[index]->type == PSEG_TYPE_PERI && 
                "peripheral psegname attribute must refer to a pseg of type PERI" );
    }
    else {
        printf("[XML ERROR] pseg not found for periph %d / clusterid = %d / psegname = %s\n", 
                periph_loc_index, cluster_index, str );
        exit(1);
    }  


    /////////// get type attribute 
    str = getStringValue(reader, "type", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("      type     = %s\n", str);
#endif
        unsigned int error = 0;

        // The TTY, IOC, NIC, FBF and IOB peripherals cannot be replicated
        // one per architecture
        if (strcmp(str, "IOC") == 0) {
            periph[periph_index]->type = PERIPH_TYPE_IOC;
            if (header->ioc_clusterid == 0xFFFFFFFF) {
                header->ioc_clusterid = cluster_index;
            }
            else {
                error = 1;
            }

            ioc_base_offset = pseg[periph[periph_index]->psegid]->base;
            nb_ioc_channel = periph[periph_index]->channels;
        } 
        else if (strcmp(str, "TTY") == 0) {
            periph[periph_index]->type = PERIPH_TYPE_TTY;
            if (header->tty_clusterid == 0xFFFFFFFF) {
                header->tty_clusterid = cluster_index;
            }
            else  {
                error = 1;
            }

            tty_base_offset = pseg[periph[periph_index]->psegid]->base;
            nb_tty_channel = periph[periph_index]->channels;
        }
        else if (strcmp(str, "FBF") == 0) {
            periph[periph_index]->type = PERIPH_TYPE_FBF;
            if (header->fbf_clusterid == 0xFFFFFFFF) {
                header->fbf_clusterid = cluster_index;
            }
            else {
                error = 1;
            }
            fbf_base_offset = pseg[periph[periph_index]->psegid]->base;
        }
        else if (strcmp(str, "NIC") == 0) {
            periph[periph_index]->type = PERIPH_TYPE_NIC;
            if (header->nic_clusterid == 0xFFFFFFFF) {
                header->nic_clusterid = cluster_index;
            }
            else {
                error = 1;
            }
            nic_base_offset = pseg[periph[periph_index]->psegid]->base;
            nb_nic_channel = periph[periph_index]->channels;
        }
        else if (strcmp(str, "IOB") == 0) {
            periph[periph_index]->type = PERIPH_TYPE_IOB;
            iob_base_offset = pseg[periph[periph_index]->psegid]->base;

            if (io_mmu_active) {
                error = 1;
            }
            io_mmu_active = 1;
        }
        // The TIM, ICU, XICU, DMA and IOB peripherals can be replicated in several clusters
        // one per cluster
        else if (strcmp(str, "TIM") == 0 ) {
            periph[periph_index]->type = PERIPH_TYPE_TIM;
            if (found_timer) {
                error = 1;
            }
            found_timer = 1;

            if (tim_base_offset == 0xFFFFFFFF) {
                tim_base_offset = pseg[ periph[periph_index]->psegid ]->base;
            }

            if (nb_timer_channel_max < periph[periph_index]->channels) {
                nb_timer_channel_max = periph[periph_index]->channels;
            }
        }
        else if (strcmp(str, "ICU") == 0) {
            periph[periph_index]->type = PERIPH_TYPE_ICU;
            if (found_icu) {
                error = 1;
            }
            found_icu = 1;

            if (icu_base_offset == 0xFFFFFFFF) {
                icu_base_offset = pseg[periph[periph_index]->psegid]->base;
            }
        }
        else if (strcmp(str, "XICU") == 0) {
            periph[periph_index]->type = PERIPH_TYPE_XICU;
            if (found_xicu) {
                error = 1;
            }
            found_xicu = 1;

            //'icu' since we can't have both xicu and icu in an arch
            if (icu_base_offset == 0xFFFFFFFF) {
                icu_base_offset = pseg[ periph[periph_index]->psegid ]->base;
            }

            if (nb_timer_channel_max == 0) {
                nb_timer_channel_max = 32;
            }
        }
        else if (strcmp(str, "DMA") == 0) {
            periph[periph_index]->type = PERIPH_TYPE_DMA;
            if (found_dma) {
                error = 1;
            }
            found_dma = 1;

            if (dma_base_offset == 0xFFFFFFFF) {
                dma_base_offset = pseg[periph[periph_index]->psegid]->base;
            }
            if (nb_dma_channel_max < periph[periph_index]->channels) {
                nb_dma_channel_max = periph[periph_index]->channels;
            }
        }
        else {
            printf("[XML ERROR] illegal <type> for peripheral %d in cluster %d\n",
                    periph_loc_index, cluster_index);
            exit(1);
        }

        if (error) {
            printf("[XML ERROR] illegal <type> for peripheral %d in cluster %d\n",
                    periph_loc_index, cluster_index);
            exit(1);
        }
    }
    else {
        printf("[XML ERROR] missing <type> for peripheral  %d in cluster %d\n",
                periph_loc_index, cluster_index);
        exit(1);
    }


    periph_index++;
    periph_loc_index++;
    cluster[cluster_index]->periphs++;

} // end periphNode


/////////////////////////////////////////
void coprocNode(xmlTextReaderPtr reader) {
    char * str;
    unsigned int ok;

    cp_port_loc_index = 0;

    if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT) {
        return;
    }

    if (coproc_index >= MAX_COPROCS) {
        printf("[XML ERROR] The number of coprocs is larger than %d\n", MAX_COPROCS);
    }

#if XML_PARSER_DEBUG
    printf("\n  coproc %d\n", coproc_index);
#endif

    coproc[coproc_index] = (mapping_coproc_t *) malloc(sizeof(mapping_coproc_t));

    /////////// get name attribute 
    str = getStringValue(reader, "name", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("      name = %s\n", str);
#endif
        strncpy(coproc[coproc_index]->name, str, 31);
    }
    else {
        printf("[XML ERROR] illegal or missing <name> for coproc %d in cluster %d\n",
                coproc_index, cluster_index);
        exit(1);
    }

    /////////// get psegname attribute 
    str = getStringValue(reader, "psegname", &ok);
    if (ok == 0) {
        printf("[XML ERROR] illegal or missing <psegname> for coproc %d in cluster %d\n", 
                coproc_index, cluster_index);
        exit(1);
    }

    /////////// set psegid attribute
    int index = getPsegId(cluster_index, str);
    if (index >= 0) {
#if XML_PARSER_DEBUG
        printf("      clusterid = %d\n", cluster_index);
        printf("      psegname  = %s\n", str);
        printf("      psegid    = %d\n", index);
#endif
        coproc[coproc_index]->psegid = index;
        assert(pseg[index]->type == PSEG_TYPE_PERI && "coproc psegname attribute must refer to a pseg of type PERI" );
    }
    else {
        printf("[XML ERROR] pseg not found for coproc %d / clusterid = %d / psegname = %s\n", 
                coproc_index, cluster_index, str );
        exit(1);
    }  

    ////////// set port_offset 
    coproc[coproc_index]->port_offset = cp_port_index;

#if XML_PARSER_DEBUG
    printf("      port_offset = %d\n", cp_port_index);
#endif

    int status = xmlTextReaderRead(reader);
    while (status == 1) {
        const char * tag = (const char *) xmlTextReaderConstName(reader);

        if (strcmp(tag, "port") == 0 ) {
            cpPortNode(reader);
        }
        else if (strcmp(tag, "#text")    == 0 ) { }
        else if (strcmp(tag, "#comment") == 0 ) { }
        else if (strcmp(tag, "coproc") == 0 ) {
            coproc[coproc_index]->ports = cp_port_loc_index;
            cluster[cluster_index]->coprocs++;
            coproc_loc_index++;
            coproc_index++;
            return;
        }
        else {
            printf("[XML ERROR] Unknown tag %s", tag);
            exit(1);
        }
        status = xmlTextReaderRead(reader);
    }
} // end coprocNode()


///////////////////////////////////////
void irqNode(xmlTextReaderPtr reader) {
    unsigned int ok;
    unsigned int value;
    char * str;

    if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT) {
        return;
    }

    if (irq_index >= MAX_IRQS) {
        printf("[XML ERROR] The number of irqs is larger than %d\n", MAX_IRQS);
    }

#if XML_PARSER_DEBUG
    printf("     irq %d\n", irq_loc_index);
#endif

    irq[irq_index] = (mapping_irq_t *) malloc(sizeof(mapping_irq_t));

    ///////// get type attribute
    str = getStringValue(reader, "type", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("        type    = %s\n", str);
#endif
        if (strcmp(str, "HARD") == 0 ) {
            irq[irq_index]->type = 0;
        }
        else if (strcmp(str, "SOFT") == 0 ) {
            irq[irq_index]->type = 1;
        }
        else {
            printf("[XML ERROR] undefined IRQ  <type> for processor %d in cluster %d\n",
                    cluster_index, proc_loc_index);
            exit(1);
        }
    }  
    else {
        printf("[XML ERROR] missing IRQ <type> for processor %d in cluster %d\n",
                cluster_index, proc_loc_index);
        exit(1);
    }

    ///////// get icuid attribute
    value = getIntValue(reader, "icuid", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("        icuid   = %d\n", value);
#endif
        irq[irq_index]->icuid = value;
        if (value >= 32) {
            printf("[XML ERROR] IRQ <icuid> too large for processor %d in cluster %d\n",
                    cluster_index, proc_loc_index);
            exit(1);
        }
    }
    else {
        printf("[XML ERROR] missing IRQ <icuid> for processor %d in cluster %d\n",
                cluster_index, proc_loc_index);
        exit(1);
    }

    ///////// get isr attribute
    str = getStringValue(reader, "isr", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("        isr     = %s\n", str);
#endif
        if      (strcmp(str, "ISR_SWITCH" ) == 0) { irq[irq_index]->isr = ISR_SWITCH; }
        else if (strcmp(str, "ISR_IOC"    ) == 0) { irq[irq_index]->isr = ISR_IOC; }
        else if (strcmp(str, "ISR_DMA"    ) == 0) { irq[irq_index]->isr = ISR_DMA; }
        else if (strcmp(str, "ISR_TTY"    ) == 0) { irq[irq_index]->isr = ISR_TTY; }
        else if (strcmp(str, "ISR_TIMER"  ) == 0) { irq[irq_index]->isr = ISR_TIMER; }
        else {
            printf("[XML ERROR] illegal IRQ <isr> for processor %d in cluster %d\n",
                    cluster_index, proc_loc_index);
            exit(1);
        }
#if XML_PARSER_DEBUG
        printf("        isrnum  = %d\n", irq[irq_index]->isr);
#endif
    }  
    else {
        printf("[XML ERROR] missing IRQ <isr> for processor %d in cluster %d\n",
                cluster_index, proc_loc_index);
        exit(1);
    }

    ///////// get channel attribute (optionnal : 0 if missing)
    value = getIntValue(reader, "channel", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("        channel = %d\n", value);
#endif
        irq[irq_index]->channel = value;
    }
    else {
        irq[irq_index]->channel = 0;
    }

    irq_index++;
    irq_loc_index++;

} // end irqNode


/////////////////////////////////////////
void procNode(xmlTextReaderPtr reader) {
    unsigned int ok;
    unsigned int value;

    irq_loc_index = 0;

    if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT) {
        return;
    }

    if (proc_index >= MAX_PROCS) {
        printf("[XML ERROR] The number of procs is larger than %d\n", MAX_PROCS);
    }

#if XML_PARSER_DEBUG
    printf("\n  proc %d\n", proc_index);
#endif

    proc[proc_index] = (mapping_proc_t *) malloc(sizeof(mapping_proc_t));


    /////////// get index attribute (optional)
    value = getIntValue(reader, "index", &ok);
    if (ok && (value != proc_loc_index)) {
        printf("[XML ERROR] wrong proc index / expected value is %d", 
                proc_loc_index);
        exit(1);
    }

    ////////// set irq_offset attribute
    proc[proc_index]->irq_offset = irq_index;

#if XML_PARSER_DEBUG
    printf("    irq_offset = %d\n", irq_index);
#endif

    int status = xmlTextReaderRead(reader);
    while (status == 1) {
        const char * tag = (const char *) xmlTextReaderConstName(reader);

        if (strcmp(tag, "irq") == 0) {
            irqNode(reader);
        }
        else if (strcmp(tag, "#text")    == 0) { }
        else if (strcmp(tag, "#comment") == 0) { }
        else if (strcmp(tag, "proc")     == 0) {
            proc[proc_index]->irqs = irq_loc_index;
            cluster[cluster_index]->procs++;
            proc_loc_index++;
            proc_index++;
            return;
        }
        else {
            printf("[XML ERROR] Unknown tag %s", tag);
            exit(1);
        }
        status = xmlTextReaderRead(reader);
    }
} // end procNode()


//////////////////////////////////////////
void psegNode(xmlTextReaderPtr reader) {
    unsigned int ok;
    unsigned int value;
    char * str;

    if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT) {
        return;
    }

    if (pseg_index >= MAX_PSEGS) {
        printf("[XML ERROR] The number of psegs is larger than %d\n", MAX_PSEGS);
        exit(1);
    }

#if XML_PARSER_DEBUG
    printf("    pseg %d\n", pseg_index);
#endif

    pseg[pseg_index] = (mapping_pseg_t *) malloc(sizeof(mapping_pseg_t));

    /////// get name attribute
    str = getStringValue(reader, "name", &ok);
#if XML_PARSER_DEBUG
    printf("      name = %s\n", str);
#endif
    if (ok) {
        strncpy(pseg[pseg_index]->name, str, 31);
    }
    else {
        printf("[XML ERROR] illegal or missing <name> for pseg %d in cluster %d\n",
                pseg_index, cluster_index);
        exit(1);
    }

    //////// get type attribute
    str = getStringValue(reader, "type", &ok);
#if XML_PARSER_DEBUG
    printf("      type = %s\n", str);
#endif
    if      (ok && (strcmp(str, "RAM" ) == 0)) { pseg[pseg_index]->type = PSEG_TYPE_RAM; }
    else if (ok && (strcmp(str, "ROM" ) == 0)) { pseg[pseg_index]->type = PSEG_TYPE_ROM; }
    else if (ok && (strcmp(str, "PERI") == 0)) { pseg[pseg_index]->type = PSEG_TYPE_PERI; }
    else {
        printf("[XML ERROR] illegal or missing <type> for pseg %s in cluster %d\n",
                pseg[pseg_index]->name, cluster_index);
        exit(1);
    }

    //////// get base attribute
    value = getIntValue(reader, "base", &ok);
#if XML_PARSER_DEBUG
    printf("      base = 0x%x\n", value);
#endif
    if (ok) {
        pseg[pseg_index]->base = value;
    }
    else {
        printf("[XML ERROR] illegal or missing <base> for pseg %s in cluster %d\n",
                pseg[pseg_index]->name, cluster_index);
        exit(1);
    }

    //////// get length attribute
    value = getIntValue(reader, "length", &ok);
#if XML_PARSER_DEBUG
    printf("      length = 0x%x\n", value);
#endif
    if (ok) {
        pseg[pseg_index]->length = value;
    }  
    else {
        printf("[XML ERROR] illegal or missing <length> for pseg %s in cluster %d\n",
                pseg[pseg_index]->name, cluster_index);
        exit(1);
    }

    //////// set cluster attribute
    pseg[pseg_index]->cluster = cluster_index;

    pseg_index++;
    cluster[cluster_index]->psegs++;
} // end psegNode()


/////////////////////////////////////////////
void clusterNode(xmlTextReaderPtr reader) {
    unsigned int ok;
    unsigned int value;

    cluster[cluster_index] = (mapping_cluster_t *) malloc(sizeof(mapping_cluster_t));

    //initialise all variables
    //they will be incremented by *Node() functions
    //FIXME: calloc?
    cluster[cluster_index]->psegs = 0;
    cluster[cluster_index]->procs = 0;
    cluster[cluster_index]->coprocs = 0;
    cluster[cluster_index]->periphs = 0;


    //initialise global variables
    //TODO: delete those three
    proc_loc_index = 0;
    coproc_loc_index = 0;
    periph_loc_index = 0;

    // for replicated periph
    found_timer = 0;
    found_icu = 0;
    found_xicu = 0;
    found_dma = 0;

    if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT) {
        return;
    }

    // checking source file consistency
    if (cluster_index >= header->clusters) {
        printf("[XML ERROR] The cluster index is too large : %d\n", cluster_index);
        exit(1);
    }

#if XML_PARSER_DEBUG
    printf("  cluster %d\n", cluster_index);
#endif


    /////////// check cluster index attribute (optional)
    value = getIntValue(reader, "index", &ok);
    if (ok && (value != cluster_index)) {
        printf("[XML ERROR] wrong cluster index / expected value is %d", 
                cluster_index);
        exit(1);
    }

    ////////// set offsets
    cluster[cluster_index]->pseg_offset = pseg_index;
    cluster[cluster_index]->proc_offset = proc_index;
    cluster[cluster_index]->coproc_offset = coproc_index;
    cluster[cluster_index]->periph_offset = periph_index;

#if XML_PARSER_DEBUG
    printf("    pseg_offset   = %d\n", pseg_index);
    printf("    proc_offset   = %d\n", proc_index);
    printf("    coproc_offset = %d\n", coproc_index);
    printf("    periph_offset = %d\n", coproc_index);
#endif

    ////////// get psegs, procs, coprocs and periphs
    int status = xmlTextReaderRead(reader);

    while (status == 1) {
        const char * tag = (const char *) xmlTextReaderConstName(reader);

        if      (strcmp(tag, "pseg")     == 0) psegNode(reader);
        else if (strcmp(tag, "proc")     == 0) procNode(reader);
        else if (strcmp(tag, "coproc")   == 0) coprocNode(reader);
        else if (strcmp(tag, "periph")   == 0) periphNode(reader);
        else if (strcmp(tag, "#text")    == 0) { }
        else if (strcmp(tag, "#comment") == 0) { }
        else if (strcmp(tag, "cluster")  == 0) {

            if (use_xicu == 0xFFFFFFFF) {
                use_xicu = found_xicu;
            }

            ////////////////// peripherals checks ////////////////////
            if ((found_timer  && use_xicu) || (!found_timer  && !use_xicu)) {
                printf("[XML ERROR] illegal or missing timer peripheral in cluster %d\n", cluster_index);
                exit(1);
            }

            if ((found_icu && use_xicu) || (!found_icu && !use_xicu)) {
                printf("[XML ERROR] illegal or missing icu peripheral in cluster %d\n", cluster_index);
                exit(1);
            }

            if (!found_xicu && use_xicu) {
                printf("[XML ERROR] illegal or missing dma peripheral in cluster %d\n", cluster_index);
                exit(1);
            }

            if (!found_dma) {
                printf("[XML ERROR] illegal or missing dma peripheral in cluster %d\n", cluster_index);
                exit(1);
            }


            if (nb_proc_max < cluster[cluster_index]->procs) {
                nb_proc_max = cluster[cluster_index]->procs;
            }

#if XML_PARSER_DEBUG
            printf("    psegs   = %d\n", cluster[cluster_index]->psegs);
            printf("    procs   = %d\n", cluster[cluster_index]->procs);
            printf("    coprocs = %d\n", cluster[cluster_index]->coprocs);
            printf("    periphs = %d\n", cluster[cluster_index]->periphs);
            printf("    end cluster %d\n", cluster_index);
#endif
            cluster_index++;
            return;
        }
        status = xmlTextReaderRead(reader);
    }
} // end clusterNode()


//////////////////////////////////////////////
void clusterSetNode(xmlTextReaderPtr reader) {
    if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT) {
        return;
    }

#if XML_PARSER_DEBUG
    printf("\n  clusters set\n");
#endif

    int status = xmlTextReaderRead(reader);
    while (status == 1) {
        const char * tag = (const char *) xmlTextReaderConstName(reader);

        if (strcmp(tag, "cluster")    == 0) {
            clusterNode(reader);
        }
        else if (strcmp(tag, "#text")      == 0) { }
        else if (strcmp(tag, "#comment")   == 0) { }
        else if (strcmp(tag, "clusterset") == 0) {
            // checking source file consistency
            if (cluster_index != header->clusters) {
                printf("[XML ERROR] Wrong number of clusters\n");
                exit(1);
            }

            if (header->tty_clusterid == 0xFFFFFFFF) {
                printf("[XML ERROR] illegal or missing tty peripheral");
                exit(1);
            }

#if XML_PARSER_DEBUG
            printf("  end cluster set\n\n");
#endif
            header->psegs = pseg_index;
            header->procs = proc_index;
            header->irqs = irq_index;
            header->coprocs = coproc_index;
            header->cp_ports = cp_port_index;
            return;
        }
        else {
            printf("[XML ERROR] Unknown tag in clusterset node : %s",tag);
            exit(1);
        }
        status = xmlTextReaderRead(reader);
    }
} // end clusterSetNode()


/////////////////////////////////////////////
void globalSetNode(xmlTextReaderPtr reader) {
    if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT) {
        return;
    }

#if XML_PARSER_DEBUG
    printf("  globals set\n");
#endif

    int status = xmlTextReaderRead(reader);
    while (status == 1) {
        const char * tag = (const char *) xmlTextReaderConstName(reader);

        if (strcmp(tag, "vseg") == 0) {
            vsegNode(reader);
        }
        else if (strcmp(tag, "#text")     == 0) { }
        else if (strcmp(tag, "#comment")  == 0) { }
        else if (strcmp(tag, "globalset") == 0) {
#if XML_PARSER_DEBUG
            printf("  end global set\n\n");
#endif
            header->globals = vseg_index;
            vseg_loc_index = 0;
            return;
        }
        else {
            printf("[XML ERROR] Unknown tag in globalset node : %s",tag);
            exit(1);
        }
        status = xmlTextReaderRead(reader);
    }
} // end globalSetNode()


/////////////////////////////////////////////
void vspaceSetNode(xmlTextReaderPtr reader) {
    if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT) {
        return;
    }

#if XML_PARSER_DEBUG
    printf("\n  vspaces set\n");
#endif

    int status = xmlTextReaderRead ( reader );
    while (status == 1) {
        const char * tag = (const char *) xmlTextReaderConstName(reader);

        if (strcmp(tag, "vspace") == 0) {
            vspaceNode(reader);
        }
        else if (strcmp(tag, "#text"    ) == 0 ) { }
        else if (strcmp(tag, "#comment" ) == 0 ) { }
        else if (strcmp(tag, "vspaceset") == 0 ) {
            // checking source file consistency
            if (vspace_index != header->vspaces) {
                printf("[XML ERROR] Wrong number of vspaces\n");
                exit(1);
            }
            else {
                header->vsegs = vseg_index;
                header->vobjs = vobj_index;
                header->tasks = task_index;
                return;
            }
        }
        else {
            printf("[XML ERROR] Unknown tag in vspaceset node : %s",tag);
            exit(1);
        }
        status = xmlTextReaderRead(reader);
    }
} // end globalSetNode()


//////////////////////////////////////////
void headerNode(xmlTextReaderPtr reader) {
    char * name;
    unsigned int value;
    unsigned int ok;

    if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT) {
        return;
    }

#if XML_PARSER_DEBUG
    printf("mapping_info\n");
#endif

    header = (mapping_header_t *) malloc(sizeof(mapping_header_t));

    ////////// get name attribute
    name = getStringValue(reader, "name", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("  name = %s\n", name);
#endif
        strncpy( header->name, name, 31);
    }
    else {
        printf("[XML ERROR] illegal or missing <name> attribute in header\n");
        exit(1);
    }

    /////////// get cluster_x attribute
    cluster_x = getIntValue(reader, "cluster_x", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("  cluster_x = %d\n", cluster_x);
#endif
        header->cluster_x = cluster_x;
    }
    else {
        printf("[XML ERROR] illegal or missing <cluster_x> attribute in header\n");
        exit(1);
    }

    /////////// get cluster_y attribute
    cluster_y = getIntValue(reader, "cluster_y", &ok);
    if (ok) {
#if XML_PARSER_DEBUG
        printf("  cluster_y = %d\n", cluster_y);
#endif
        header->cluster_y = cluster_y;
    }
    else {
        printf("[XML ERROR] illegal or missing <cluster_y> attribute in header\n");
        exit(1);
    }

    //check the number of cluster
    value = cluster_x * cluster_y;
    if (value >= MAX_CLUSTERS) {
        printf("[XML ERROR] The number of clusters is larger than %d\n", MAX_CLUSTERS);
        exit(1);
    }

    header->clusters  = value;

#if XML_PARSER_DEBUG
    printf("  clusters = %d\n", value);
#endif

    ///////// get vspaces attribute
    value = getIntValue(reader, "vspaces", &ok);
    if (ok) {
        if (value >= MAX_VSPACES) {
            printf("[XML ERROR] The number of vspaces is larger than %d\n", MAX_VSPACES);
            exit(1);
        }
#if XML_PARSER_DEBUG
        printf("  vspaces = %d\n", value);
#endif
        header->vspaces  = value;
    }
    else {
        printf("[XML ERROR] illegal or missing <vspaces> attribute in mapping\n");
        exit(1);
    }

    //////// initialise non replicated peripherals cluster_id
    header->tty_clusterid = 0xFFFFFFFF;
    header->nic_clusterid = 0xFFFFFFFF;
    header->ioc_clusterid = 0xFFFFFFFF;
    header->fbf_clusterid = 0xFFFFFFFF;

    ///////// set signature
    header->signature = IN_MAPPING_SIGNATURE;

    int status = xmlTextReaderRead(reader);
    while (status == 1) {
        const char * tag = (const char *) xmlTextReaderConstName(reader);

        if (strcmp(tag, "clusterset") == 0) {
            clusterSetNode(reader);
        }
        else if (strcmp(tag, "globalset")    == 0) { globalSetNode(reader); }
        else if (strcmp(tag, "vspaceset")    == 0) { vspaceSetNode(reader); }
        else if (strcmp(tag, "#text")        == 0) { }
        else if (strcmp(tag, "#comment")     == 0) { }
        else if (strcmp(tag, "mapping_info") == 0) {
#if XML_PARSER_DEBUG
            printf("end mapping_info\n");
#endif
            return;
        }
        else {
            printf("[XML ERROR] Unknown tag in header node : %s\n",tag);
            exit(1);
        }
        status = xmlTextReaderRead(reader);
    }
} // end headerNode()


///////////////////////////////////////
void BuildTable(int fdout, const char * type, unsigned int nb_elem,
                unsigned int elem_size, char ** table) {
    unsigned int i;
    // write element
    for (i = 0; i < nb_elem; i++) {
        if (elem_size != write(fdout, table[i], elem_size)) {
            printf("function %s: %s(%d) write  error \n", __FUNCTION__, type, i);
            exit(1);
        }

#if XML_PARSER_DEBUG
        printf("Building binary: writing %s %d\n", type, i);
#endif
    }
}


int open_file(const char * file_path) {

    //open file
    int fdout = open( file_path, (O_CREAT | O_RDWR), (S_IWUSR | S_IRUSR) );
    if (fdout < 0) {
        perror("open");
        exit(1);
    }

    //reinitialise the file
    if (ftruncate(fdout, 0)) {
        perror("truncate");
        exit(1);
    }

    //#if XML_PARSER_DEBUG
    printf("%s\n", file_path);
    //#endif

    return fdout;
}


///////////////////////////
void buildBin(const char * file_path) {
    unsigned int length;

    int fdout = open_file(file_path);

    // write header to binary file
    length = write(fdout, (char *) header, sizeof(mapping_header_t));
    if (length != sizeof(mapping_header_t)) {
        printf("write header error : length = %d \n", length);
        exit(1);
    }

    // write clusters
    BuildTable(fdout, "cluster", cluster_index, sizeof(mapping_cluster_t), (char **) cluster);
    // write psegs
    BuildTable(fdout, "pseg", pseg_index, sizeof(mapping_pseg_t), (char **) pseg);
    // write vspaces
    BuildTable(fdout, "vspace", vspace_index, sizeof(mapping_vspace_t), (char **) vspace);
    // write vsegs
    BuildTable(fdout, "vseg", vseg_index, sizeof(mapping_vseg_t), (char **) vseg);
    // write vobjs
    BuildTable(fdout, "vobj", vobj_index, sizeof(mapping_vobj_t), (char **) vobj);
    // write tasks array
    BuildTable(fdout, "task", task_index, sizeof(mapping_task_t), (char **) task);
    //building procs array
    BuildTable(fdout, "proc", proc_index, sizeof(mapping_proc_t), (char **) proc);
    //building irqs array
    BuildTable(fdout, "irq", irq_index, sizeof(mapping_irq_t), (char **) irq);
    //building coprocs array
    BuildTable(fdout, "coproc", coproc_index, sizeof(mapping_coproc_t), (char **) coproc);
    //building cp_ports array
    BuildTable(fdout, "cp_port", cp_port_index, sizeof(mapping_cp_port_t),(char **) cp_port);
    //building periphs array
    BuildTable(fdout, "periph", periph_index, sizeof(mapping_periph_t), (char **) periph);

    close(fdout);

} // end buildBin()


///////////////////////////////////////////////////////////////////////
// this function set the value the vobj_id fiels of all cp_ports
///////////////////////////////////////////////////////////////////////
void prepareBuild() {
    unsigned int i;
    //asign for all cp_ports the correct vspaceid and vobjid
    for (i = 0; i < cp_port_index; i++) {
        int vspace_id = getVspaceId(cp_port_vobj_ref[i]->vspace_name);
        if (vspace_id < 0) {
            printf("[XML ERROR] illegal  <vspacename> for cp_port %d,\n", i);
            exit(1);
        }
        cp_port[i]->vspaceid = vspace_id;

        int vobj_id = getVobjLocId(vspace_id, cp_port_vobj_ref[i]->vobj_name, vspace[vspace_id]->vobjs);
        if (vobj_id >= 0) {

#if XML_PARSER_DEBUG
            printf("\ncp_port = %d\n", i);
            printf("      vspace_name  = %s\n", cp_port_vobj_ref[i]->vspace_name);
            printf("      vobj_name    = %s\n", cp_port_vobj_ref[i]->vobj_name);
            printf("      vobj_index   = %d\n", vobj_id);
#endif
            cp_port[i]->vobjlocid = vobj_id;

            assert((vobj[ vspace[vspace_id]->vobj_offset + vobj_id]->type == VOBJ_TYPE_MWMR)
                    && "coproc ports have to refer to a vobj of type MWMR");
        }
        else {
            printf("[XML ERROR] illegal  <vobjname> for cp_port %d,\n", i);
            exit(1);
        }
    }
}


//////////////////////////////////////////
void file_write(int fdout, char * towrite) {
    unsigned int size = strlen(towrite);
    if (size != write(fdout, towrite, size)) {
        printf("file_write error");
        exit(1);
    }
}


//////////////////////////////////////////////////
void def_int_write(int fdout, char * def, int num) {
    char  buf[64];
    sprintf(buf, "#define\t %s  %d\n", def, num);
    file_write(fdout, buf);
}


/////////////////////////////////////////////////
void def_hex_write(int fdout, char * def, int num) {
    char  buf[64];
    sprintf(buf, "#define\t %s  0x%x\n", def, num);
    file_write(fdout, buf);
}


///////////////////////////////////////
void  genHd(const char * file_path) {
    int fdout = open_file(file_path);

    char * prol = " /* Generated from the mapping_info file */\n\n#ifndef _HD_CONFIG_H\n#define _HD_CONFIG_H\n\n";
    file_write(fdout, prol);

    def_int_write(fdout, "CLUSTER_X"    , cluster_x);
    def_int_write(fdout, "CLUSTER_Y"    , cluster_y);
    def_int_write(fdout, "NB_CLUSTERS"  , cluster_index);
    def_hex_write(fdout, "CLUSTER_SIZE" , (((unsigned long long) 1) << 32) / cluster_index);
    def_int_write(fdout, "NB_PROCS_MAX" , nb_proc_max);
    def_int_write(fdout, "NB_TIMERS_MAX", nb_timer_channel_max);
    def_int_write(fdout, "NB_DMAS_MAX"  , nb_dma_channel_max);
    def_int_write(fdout, "NB_TTYS"      , nb_tty_channel);
    def_int_write(fdout, "NB_IOCS"      , nb_ioc_channel);
    def_int_write(fdout, "NB_NICS"      , nb_nic_channel);

    file_write(fdout, "\n");
    def_int_write(fdout, "USE_XICU"     , use_xicu);
    def_int_write(fdout, "IOMMU_ACTIVE ", io_mmu_active);

    char * epil = "\n#endif //_HD_CONFIG_H";
    file_write(fdout, epil);

    close(fdout);
}


////////////////////////////////////////////////////////
void ld_write(int fdout, char * seg, unsigned int addr) {
    char buf[64];
    sprintf(buf, "%s = 0x%x;\n", seg, addr);
    file_write(fdout, buf);

}


///////////////////////////////////////
void genLd(const char * file_path) {
    int fdout = open_file(file_path);

    char * prol = "/* Generated from the mapping_info file */\n\n";
    file_write(fdout, prol);

    //boot
    ld_write(fdout, "seg_boot_code_base", boot_code_base);
    ld_write(fdout, "seg_boot_stack_base", boot_stack_base);
    ld_write(fdout, "seg_mapping_base", boot_mapping_base);

    //kernel
    ld_write(fdout, "\nseg_kernel_code_base",  kernel_code_base);
    ld_write(fdout, "seg_kernel_data_base",    kernel_data_base);
    ld_write(fdout, "seg_kernel_uncdata_base", kernel_uncdata_base);
    ld_write(fdout, "seg_kernel_init_base",    kernel_init_base);

    //peripherals
    ld_write(fdout, "\nseg_fbf_base", fbf_base_offset);
    ld_write(fdout, "seg_icu_base",   icu_base_offset);
    ld_write(fdout, "seg_ioc_base",   ioc_base_offset);
    ld_write(fdout, "seg_nic_base",   nic_base_offset);
    ld_write(fdout, "seg_tty_base",   tty_base_offset);
    ld_write(fdout, "seg_dma_base",   dma_base_offset);
    ld_write(fdout, "seg_tim_base",   tim_base_offset);
    ld_write(fdout, "seg_gcd_base",   gcd_base_offset);
    ld_write(fdout, "seg_iob_base",   iob_base_offset);

    close(fdout);
}


char * buildPath(const char * path, const char * name) {
    char * res = calloc(strlen(path) + strlen(name) + 1, 1);
    strcat(res, path);
    strcat(res, "/");
    strcat(res, name);
    return res; 
}


/////////////////////////////////////
int main(int argc, char * argv[]) {
    if (argc < 3) {
        printf("Usage: xml2bin <input_file_path> <output_path>\n");
        return 1;
    }

    struct stat dir_st;
    if (stat( argv[2], &dir_st)) {
        perror("bad path");
        exit(1);
    }

    if ((dir_st.st_mode & S_IFDIR) == 0) {
        printf("path is not a dir: %s", argv[2] );
        exit(1);
    }


    char * map_path = buildPath(argv[2], "map.bin"); 
    char * ld_path = buildPath(argv[2], "giet_vsegs.ld"); 
    char * hd_path = buildPath(argv[2], "hard_config.h"); 

    LIBXML_TEST_VERSION;

    int status;
    xmlTextReaderPtr reader = xmlReaderForFile(argv[1], NULL, 0);

    if (reader != NULL) {
        status = xmlTextReaderRead (reader);
        while (status == 1) {
            const char * tag = (const char *) xmlTextReaderConstName(reader);

            if (strcmp(tag, "mapping_info") == 0) { 
                headerNode(reader);
                prepareBuild();
                buildBin(map_path);
                genHd(hd_path);
                genLd(ld_path);
            }
            else {
                printf("[XML ERROR] Wrong file type: \"%s\"\n", argv[1]);
                return 1;
            }
            status = xmlTextReaderRead(reader);
        }
        xmlFreeTextReader(reader);

        if (status != 0) {
            printf("[XML ERROR] Wrong Syntax in \"%s\" file\n", argv[1]);
            return 1;
        }
    }
    return 0;
} // end main()


// Local Variables:
// tab-width: 4
// c-basic-offset: 4
// c-file-offsets:((innamespace . 0)(inline-open . 0))
// indent-tabs-mode: nil
// End:
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4