src/dev/simple_disk.cc

   1 /*
   2  * Copyright (c) 2001-2005 The Regents of The University of Michigan
   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: Nathan Binkert
  29  */
  30
  31 /* @file
  32  * Simple disk interface for the system console
  33  */
  34
  35 #include <sys/types.h>
  36 #include <sys/uio.h>
  37 #include <fcntl.h>
  38 #include <unistd.h>
  39
  40 #include <cstring>
  41 #include <string>
  42
  43 #include "base/misc.hh"
  44 #include "base/trace.hh"
  45 #include "dev/disk_image.hh"
  46 #include "dev/simple_disk.hh"
  47 #include "mem/port.hh"
  48 #include "sim/builder.hh"
  49 #include "sim/system.hh"
  50
  51 using namespace std;
  52
  53 SimpleDisk::SimpleDisk(const string &name, System *sys, DiskImage *img)
  54     : SimObject(name), system(sys), image(img)
  55 {}
  56
  57 SimpleDisk::~SimpleDisk()
  58 {}
  59
  60
  61 void
  62 SimpleDisk::read(Addr addr, baddr_t block, int count) const
  63 {
  64     uint8_t *data = new uint8_t[SectorSize * count];
  65
  66     if (count & (SectorSize - 1))
  67         panic("Not reading a multiple of a sector (count = %d)", count);
  68
  69     for (int i = 0, j = 0; i < count; i += SectorSize, j++)
  70         image->read(data + i, block + j);
  71
  72     system->functionalPort.writeBlob(addr, data, count);
  73
  74     DPRINTF(SimpleDisk, "read  block=%#x len=%d\n", (uint64_t)block, count);
  75     DDUMP(SimpleDiskData, data, count);
  76
  77     delete data;
  78 }
  79
  80 void
  81 SimpleDisk::write(Addr addr, baddr_t block, int count)
  82 {
  83     panic("unimplemented!\n");
  84
  85 #if 0
  86     uint8_t *data = physmem->dma_addr(addr, count);
  87     if (!data)
  88         panic("dma out of range! write addr=%#x count=%d\n", addr, count);
  89
  90     image->write(data, block, count);
  91 #endif
  92 }
  93
  94 BEGIN_DECLARE_SIM_OBJECT_PARAMS(SimpleDisk)
  95
  96     SimObjectParam<System *> system;
  97     SimObjectParam<DiskImage *> disk;
  98
  99 END_DECLARE_SIM_OBJECT_PARAMS(SimpleDisk)
 100
 101 BEGIN_INIT_SIM_OBJECT_PARAMS(SimpleDisk)
 102
 103     INIT_PARAM(system, "System pointer"),
 104     INIT_PARAM(disk, "Disk Image")
 105
 106 END_INIT_SIM_OBJECT_PARAMS(SimpleDisk)
 107
 108 CREATE_SIM_OBJECT(SimpleDisk)
 109 {
 110     return new SimpleDisk(getInstanceName(), system, disk);
 111 }
 112
 113 REGISTER_SIM_OBJECT("SimpleDisk", SimpleDisk)