Subversion Repositories darkriscv

/*

 * Copyright (c) 2018, Marcelo Samsoniuk

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *

 * * Redistributions of source code must retain the above copyright notice, this

 *   list of conditions and the following disclaimer.

 *

 * * 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.

 *

 * * Neither the name of the copyright holder nor the names of its

 *   contributors may be used to endorse or promote products derived from

 *   this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER 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.

 */

#include <io.h>

#include <stdio.h>

int main(void)

{

    printf("board: %s (id=%d)\n",board_name(io.board_id),io.board_id);

    printf("build: %s for %s\n",BUILD,ARCH);

    for(int i=0;i!=threads;i++)

    {

      printf("core0/thread%d: darkriscv@%d.%dMHz rv32%s%s%s\n",

          i,

          io.board_cm,                        // board clock MHz

          io.board_ck,                        // board clock kHz

          check4rv32i()?"i":"e",              // architecture

          threads>1?"+MT":"",                 // MT  support

          mac(1000,16,16)==1256?"+MAC":"");   // MAC support

    }

    threads = 0; // prepare for the next restart

    printf("uart0: 115200 bps (div=%d)\n",io.uart.baud);

    printf("timr0: frequency=%dHz (io.timer=%d)\n",(io.board_cm*1000000u+io.board_ck*10000u)/(io.timer+1),io.timer);

    printf("\n");

    printf("Welcome to DarkRISCV!\n");

    // main loop

    while(1)

    {

        char  buffer[64];

        printf("> ");

        memset(buffer,0,sizeof(buffer));

        gets(buffer,sizeof(buffer));

        char *argv[8];

        int   argc;

        for(argc=0;argc<8 && (argv[argc]=strtok(argc==0?buffer:NULL," "));argc++)

            //printf("argv[%d] = [%s]\n",argc,argv[argc]);

            ;

        if(argv[0])

        {

          if(!strcmp(argv[0],"clear"))

          {

              printf("\33[H\33[2J");

          }

          else

          if(!strcmp(argv[0],"reboot"))

          {

              int i;

              printf("core0: reboot in 3 seconds");

              for(i=0;i!=3;i++)

              {

                  usleep(1000000);

                  putchar('.');

              }

              printf("done.\n");

              return 0;

          }

          else

          if(!strcmp(argv[0],"dump"))

          {

              char *p=(char *)(kmem+(argv[1]?xtoi(argv[1]):0));

              int i,j;

              for(i=0;i!=16;i++)

              {

                  printf("%x: ",(unsigned) p);

                  for(j=0;j!=16;j++) printf("%x ",p[j]);

                  for(j=0;j!=16;j++) putchar((p[j]>=32&&p[j]<127)?p[j]:'.');

                  putchar('\n');

                  p+=16;

              }

          }

          else

          if(0) // if(!strncmp(argv[0],"rd",2)||!strncmp(argv[0],"wr",2))

          {

              int kp = 2,

                  i = 1,j,k,w,

                  vp = 1;

              if(argv[0][kp]=='m')

              {

                  i=xtoi(argv[vp++]);

                  kp++;

              }

              printf("%x: ",k=xtoi(argv[vp++]));

              for(j=0;i--;j++)

              {

                  if(argv[0][0]=='r')

                  {

                      if(argv[0][kp]=='b') printf("%x ",j[(char  *)k]);

                      if(argv[0][kp]=='w') printf("%x ",j[(short *)k]);

                      if(argv[0][kp]=='l') printf("%x ",j[(int   *)k]);

                  }

                  else

                  {

                      w = xtoi(argv[vp++]);

                      if(argv[0][kp]=='b') printf("%x ",j[(char  *)k]=w);

                      if(argv[0][kp]=='w') printf("%x ",j[(short *)k]=w);

                      if(argv[0][kp]=='l') printf("%x ",j[(int   *)k]=w);

                  }

              }

              printf("\n");

          }

          else

          if(!strcmp(argv[0],"led"))

          {

              if(argv[1]) io.led = xtoi(argv[1]);

              printf("led = %x\n",io.led);

          }

          else

          if(!strcmp(argv[0],"timer"))

          {

              if(argv[1]) io.timer = atoi(argv[1]);

              printf("timer = %d\n",io.timer);

          }

          else

          if(!strcmp(argv[0],"gpio"))

          {

              if(argv[1]) io.gpio = xtoi(argv[1]);

              printf("gpio = %x\n",io.gpio);

          }

          else

          if(!strcmp(argv[0],"mul"))

          {

              int x = atoi(argv[1]);

              int y = atoi(argv[2]);

              printf("mul = %d\n",x*y);

          }

          else

          if(!strcmp(argv[0],"div"))

          {

              int x = atoi(argv[1]);

              int y = atoi(argv[2]);

              printf("div = %d, mod = %d\n",x/y,x%y);

          }

          else

          if(!strcmp(argv[0],"mac"))

          {

              int acc = atoi(argv[1]);

              int x = atoi(argv[2]);

              int y = atoi(argv[3]);

              printf("mac = %d\n",mac(acc,x,y));

          }

          else

          if(!strcmp(argv[0],"srai"))

          {

              int acc = xtoi(argv[1]);

              printf("srai %x >> 1 = %x\n",acc,acc>>1);

          }

          else

          if(argv[0][0])

          {

              printf("command: [%s] not found.\n"

                     "valid commands: clear, dump <hex>, led <hex>, timer <dec>, gpio <hex>\n"

                     "                mul <dec> <dec>, div <dec> <dec>, mac <dec> <dec> <dec>\n"

                     "                rd[m][bwl] <hex> [<hex> when m], wr[m][bwl] <hex> <hex> [<hex> when m]\n",

                     argv[0]);

          }

       }

    }

}