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/*********************************************************************/
/* Copyright 2009, 2010 The University of Texas at Austin.           */
/* All rights reserved.                                              */
/*                                                                   */
/* Redistribution and use in source and binary forms, with or        */
/* without modification, are permitted provided that the following   */
/* conditions are met:                                               */
/*                                                                   */
/*   1. Redistributions of source code must retain the above         */
/*      copyright notice, this list of conditions and the following  */
/*      disclaimer.                                                  */
/*                                                                   */
/*   2. Redistributions in binary form must reproduce the above      */
/*      copyright notice, this list of conditions and the following  */
/*      disclaimer in the documentation and/or other materials       */
/*      provided with the distribution.                              */
/*                                                                   */
/*    THIS  SOFTWARE IS PROVIDED  BY THE  UNIVERSITY OF  TEXAS AT    */
/*    AUSTIN  ``AS IS''  AND ANY  EXPRESS OR  IMPLIED WARRANTIES,    */
/*    INCLUDING, BUT  NOT LIMITED  TO, THE IMPLIED  WARRANTIES OF    */
/*    MERCHANTABILITY  AND FITNESS FOR  A PARTICULAR  PURPOSE ARE    */
/*    DISCLAIMED.  IN  NO EVENT SHALL THE UNIVERSITY  OF TEXAS AT    */
/*    AUSTIN OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,    */
/*    INCIDENTAL,  SPECIAL, EXEMPLARY,  OR  CONSEQUENTIAL DAMAGES    */
/*    (INCLUDING, BUT  NOT LIMITED TO,  PROCUREMENT OF SUBSTITUTE    */
/*    GOODS  OR  SERVICES; LOSS  OF  USE,  DATA,  OR PROFITS;  OR    */
/*    BUSINESS INTERRUPTION) HOWEVER CAUSED  AND ON ANY THEORY OF    */
/*    LIABILITY, WHETHER  IN CONTRACT, STRICT  LIABILITY, OR TORT    */
/*    (INCLUDING NEGLIGENCE OR OTHERWISE)  ARISING IN ANY WAY OUT    */
/*    OF  THE  USE OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE    */
/*    POSSIBILITY OF SUCH DAMAGE.                                    */
/*                                                                   */
/* The views and conclusions contained in the software and           */
/* documentation are those of the authors and should not be          */
/* interpreted as representing official policies, either expressed   */
/* or implied, of The University of Texas at Austin.                 */
/*********************************************************************/

#define CPU_GENERIC   0
#define CPU_C910V     1

static char *cpuname[] = {
  "RISCV64_GENERIC",
  "C910V"
};

int detect(void){
#ifdef __linux
  FILE *infile;
  char buffer[512],isa_buffer[512],model_buffer[512];
  const char* check_c910_str = "T-HEAD C910";
  char *pmodel = NULL, *pisa = NULL;

  infile = fopen("/proc/cpuinfo", "r");
  while (fgets(buffer, sizeof(buffer), infile)){
    if(!strncmp(buffer, "model name", 10)){
      strcpy(model_buffer, buffer);
      pmodel = strchr(isa_buffer, ':') + 1;
    }

    if(!strncmp(buffer, "isa", 3)){
      strcpy(isa_buffer, buffer);
      pisa = strchr(isa_buffer, '4') + 1;
    }
  }

  fclose(infile);

  if (!pmodel)
   return(CPU_GENERIC);
   
  if (strstr(pmodel, check_c910_str) && strchr(pisa, 'v'))
    return CPU_C910V;

  return CPU_GENERIC;
#endif

  return CPU_GENERIC;
}

char *get_corename(void){
  return cpuname[detect()];
}

void get_architecture(void){
  printf("RISCV64");
}

void get_subarchitecture(void){
  printf("%s",cpuname[detect()]);
}

void get_subdirname(void){
  printf("riscv64");
}

void get_cpuconfig(void){
  printf("#define %s\n", cpuname[detect()]);
  printf("#define L1_DATA_SIZE 65536\n");
  printf("#define L1_DATA_LINESIZE 32\n");
  printf("#define L2_SIZE 512488\n");
  printf("#define L2_LINESIZE 32\n");
  printf("#define DTB_DEFAULT_ENTRIES 64\n");
  printf("#define DTB_SIZE 4096\n");
  printf("#define L2_ASSOCIATIVE 4\n");
}

void get_libname(void){
  printf("riscv64\n");
}