src/base/loader/hex_file.cc

   1 /*
   2  * Copyright (c) 2007 MIPS Technologies, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * Authors: Jaidev Patwardhan
  29  */
  30
  31 #include <list>
  32 #include <string>
  33
  34 #include <sys/types.h>
  35 #include <sys/mman.h>
  36 #include <fcntl.h>
  37 #include <stdio.h>
  38 #include <unistd.h>
  39
  40 #include "base/cprintf.hh"
  41 #include "base/loader/hex_file.hh"
  42 #include "base/loader/symtab.hh"
  43
  44
  45 #include "mem/translating_port.hh"
  46
  47 using namespace std;
  48 /* Load a Hex File into memory.
  49    Currently only used with MIPS BARE_IRON mode.
  50    A hex file consists of [Address Data] tuples that get directly loaded into
  51    physical memory. The address specified is a word address (i.e., to get the byte address, shift left by 2)
  52    The data is a full 32-bit hex value.
  53 */
  54 HexFile::HexFile(const string _filename)
  55     : filename(_filename)
  56 {
  57   fp = fopen(filename.c_str(),"r");
  58   if(fp == NULL)
  59     {
  60       panic("Unable to open %s\n",filename.c_str());
  61     }
  62
  63 }
  64
  65 HexFile::~HexFile()
  66 {
  67 }
  68
  69
  70 bool
  71 HexFile::loadSections(Port *memPort, Addr addrMask)
  72 {
  73   char Line[64];
  74   Addr MemAddr;
  75   uint32_t Data;
  76   while(!feof(fp))
  77     {
  78       fgets(Line,64,fp);
  79       parseLine(Line,&MemAddr,&Data);
  80       //      printf("Hex:%u\n",Data);
  81
  82       if(MemAddr != 0)
  83         {
  84           // Now, write to memory
  85           memPort->writeBlob(MemAddr<<2,(uint8_t *)&Data,sizeof(Data));
  86         }
  87     }
  88     return true;
  89 }
  90 void HexFile::parseLine(char *Str,Addr *A, uint32_t *D)
  91 {
  92   int i=0;
  93   bool Flag = false;
  94   *A = 0;
  95   *D = 0;
  96   int Digit = 0;
  97   unsigned Number = 0;
  98   /* Skip white spaces */
  99   while(Str[i] != '\0' && Str[i]==' ')
 100     i++;
 101
 102   /* Ok, we're at some character...process things */
 103   while(Str[i] != '\0')
 104     {
 105       if(Str[i]>='0' && Str[i]<='9')
 106         {
 107           Digit=Str[i]-'0';
 108         }
 109       else if(Str[i]>='a' && Str[i]<='f')
 110         {
 111           Digit=Str[i]-'a'+10;
 112         }
 113       else if(Str[i]>='A' && Str[i]<='F')
 114         {
 115           Digit=Str[i]-'A'+10;
 116         }
 117       else if(Str[i] == ' ' || Str[i]=='\n')
 118         {
 119           if(Number == 0)
 120             return;
 121           if(Flag == false)
 122             {
 123               *A = Number;
 124               Number = 0;
 125               Flag = true;
 126             }
 127           else
 128             {
 129               *D = Number;
 130               return;
 131             }
 132         }
 133       else
 134         {
 135           // Ok, we've encountered a non-hex character, cannot be a valid line, skip and return 0's
 136           *A = 0;
 137           *D = 0;
 138           return;
 139         }
 140       Number<<=4;
 141       Number+=Digit;
 142       i++;
 143
 144     }
 145   if(Flag != true)
 146     {
 147       *A = 0;
 148       *D = 0;
 149     }
 150   else
 151     *D = Number;
 152
 153 }
 154
 155
 156
 157 void
 158 HexFile::close()
 159 {
 160   fclose(fp);
 161 }