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 "debug/SimpleDisk.hh"
  46 #include "debug/SimpleDiskData.hh"
  47 #include "dev/disk_image.hh"
  48 #include "dev/simple_disk.hh"
  49 #include "mem/port_proxy.hh"
  50 #include "sim/system.hh"
  51
  52 using namespace std;
  53
  54 SimpleDisk::SimpleDisk(const Params *p)
  55     : SimObject(p), system(p->system), image(p->disk)
  56 {}
  57
  58 SimpleDisk::~SimpleDisk()
  59 {}
  60
  61
  62 void
  63 SimpleDisk::read(Addr addr, baddr_t block, int count) const
  64 {
  65     uint8_t *data = new uint8_t[SectorSize * count];
  66
  67     if (count & (SectorSize - 1))
  68         panic("Not reading a multiple of a sector (count = %d)", count);
  69
  70     for (int i = 0, j = 0; i < count; i += SectorSize, j++)
  71         image->read(data + i, block + j);
  72
  73     system->physProxy.writeBlob(addr, data, count);
  74
  75     DPRINTF(SimpleDisk, "read  block=%#x len=%d\n", (uint64_t)block, count);
  76     DDUMP(SimpleDiskData, data, count);
  77
  78     delete [] data;
  79 }
  80
  81 void
  82 SimpleDisk::write(Addr addr, baddr_t block, int count)
  83 {
  84     panic("unimplemented!\n");
  85
  86 #if 0
  87     uint8_t *data = physmem->dma_addr(addr, count);
  88     if (!data)
  89         panic("dma out of range! write addr=%#x count=%d\n", addr, count);
  90
  91     image->write(data, block, count);
  92 #endif
  93 }
  94
  95 SimpleDisk *
  96 SimpleDiskParams::create()
  97 {
  98     return new SimpleDisk(this);
  99 }