mem_iacxl10_2004_3_16.cpp

自己编写的ARM处理器的指令集仿真

#include "mem_IAcxl10_2004_3_16.h"
#include <iostream.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

memarg_stru  rst;

void mem(unsigned long addr,unsigned long* data,bool nrw,int mas,bool *)
{
   unsigned long temp,half;
   //printf("in mem(),addr=0x%x,data=0x%x,nrw=%d,mas=%d\n",addr,*data,nrw,mas);
   temp = (*data);//cout<<"mas="<<hex<<mas<<" addr="<<addr<<endl;
   
   if( nrw )
   {
     
       switch( mas )
      {
       case 0 : rst.memptr[addr] = ((char)(*data))&0xff;
                break;
       case 1:  if( (addr%4) > 1 )
                   { 
                     temp = (temp << 16);
                     half = (*((unsigned long*)rst.memptr + addr/4) & 0xffff);
                     half = half + temp;           
                                      
                   }   
                else
                   {
                     half = (*((unsigned long*)rst.memptr + addr/4) & 0xffff0000);                
                     half = half + temp;
                   }
                   // if( addr == 0x1fff8e ) cout<<"half="<<hex<<half<<endl;
                    *((unsigned long*)rst.memptr + addr/4) = half;
                break;
       case 2:  *((unsigned long*)rst.memptr + addr/4) = temp;
                break;
       default: break;
      
      }
   }
   else
   {
     
      switch( mas )
     {
       case 0 : (*data) =rst.memptr[addr]&0xff;
               // if( addr == 0x1ffc8b ) cout<<"byte "<<hex<<(*data)<<endl;
                break;
       case 1 : if( (addr%4) > 1 )
                  (*data) = *((unsigned long*)rst.memptr + addr/4) >> 16;
                else
                  (*data) = *((unsigned long*)rst.memptr + addr/4);
                  (*data) = (*data) & 0xffff;
                break;
       case 2:  (*data)   = *((unsigned long*)rst.memptr + addr/4);
                break;
       default: break;
     }
     
   }
  
   
}        
  
   

memarg_stru getmem()
{
      
      rst.memptr  = new char[2*1024*1024];
      rst         = 2*1024*1024;
     
      return rst;
}


void load(char* filename)
{
     FILE*  fp;
     char*  p;
     
     p  = rst.memptr ;
     fp = fopen(filename,"r");
     
     if( fp == NULL )
       {
           cout<<"Can't open file "<<filename<<": No such file or directory"<<endl;
           exit(0);
       }

     fseek(fp,0x8000,SEEK_SET);
    fread(p,0x19200,0x19200,fp);
    
   // fclose(fp);
  //     fseek(fp,0x34,SEEK_SET);
   //   fread(p,0x37,0x37,fp);
}

/*
void load(char *program,unsigned long addr,int size)
{
  FILE *fp;
  char *p;
  int i;
  //printf("in load(),addr=0x%x\n",addr);
  p=rst.memptr+addr;
  fp=fopen(program,"r");
  if(fp == NULL)
    {
      printf("cannot open file %s\n",program);
      return;
    }
  fseek(fp,0x8000+addr,SEEK_SET);
  fread(p,sizeof(char),size,fp);

  fclose(fp);
}
*/