dev/simple_disk.cc

   1 /*
   2  * Copyright (c) 2001-2003 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
  29 /* @file
  30  * Simple disk interface for the system console
  31  */
  32
  33 #include <sys/types.h>
  34 #include <sys/uio.h>
  35 #include <fcntl.h>
  36 #include <unistd.h>
  37
  38 #include <cstring>
  39 #include <string>
  40
  41 #include "base/misc.hh"
  42 #include "base/trace.hh"
  43 #include "dev/disk_image.hh"
  44 #include "dev/simple_disk.hh"
  45 #include "mem/functional/physical.hh"
  46 #include "sim/builder.hh"
  47
  48 using namespace std;
  49
  50 SimpleDisk::SimpleDisk(const string &name, PhysicalMemory *pmem,
  51                        DiskImage *img)
  52     : SimObject(name), physmem(pmem), image(img)
  53 {}
  54
  55 SimpleDisk::~SimpleDisk()
  56 {}
  57
  58
  59 void
  60 SimpleDisk::read(Addr addr, baddr_t block, int count) const
  61 {
  62     uint8_t *data = physmem->dma_addr(addr, count);
  63     if (!data)
  64         panic("dma out of range! read addr=%#x count=%d\n", addr, 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     DPRINTF(SimpleDisk, "read  block=%#x len=%d\n", (uint64_t)block, count);
  73     DDUMP(SimpleDiskData, data, count);
  74 }
  75
  76 void
  77 SimpleDisk::write(Addr addr, baddr_t block, int count)
  78 {
  79     panic("unimplemented!\n");
  80
  81 #if 0
  82     uint8_t *data = physmem->dma_addr(addr, count);
  83     if (!data)
  84         panic("dma out of range! write addr=%#x count=%d\n", addr, count);
  85
  86     image->write(data, block, count);
  87 #endif
  88 }
  89
  90 BEGIN_DECLARE_SIM_OBJECT_PARAMS(SimpleDisk)
  91
  92     SimObjectParam<PhysicalMemory *> physmem;
  93     SimObjectParam<DiskImage *> disk;
  94
  95 END_DECLARE_SIM_OBJECT_PARAMS(SimpleDisk)
  96
  97 BEGIN_INIT_SIM_OBJECT_PARAMS(SimpleDisk)
  98
  99     INIT_PARAM(physmem, "Physical Memory"),
 100     INIT_PARAM(disk, "Disk Image")
 101
 102 END_INIT_SIM_OBJECT_PARAMS(SimpleDisk)
 103
 104 CREATE_SIM_OBJECT(SimpleDisk)
 105 {
 106     return new SimpleDisk(getInstanceName(), physmem, disk);
 107 }
 108
 109 REGISTER_SIM_OBJECT("SimpleDisk", SimpleDisk)