simple_disk.cc revision 1762 
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
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
48using namespace std;
49
50SimpleDisk::SimpleDisk(const string &name, PhysicalMemory *pmem,
51                       DiskImage *img)
52    : SimObject(name), physmem(pmem), image(img)
53{}
54
55SimpleDisk::~SimpleDisk()
56{}
57
58
59void
60SimpleDisk::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
76void
77SimpleDisk::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
90BEGIN_DECLARE_SIM_OBJECT_PARAMS(SimpleDisk)
91
92    SimObjectParam<PhysicalMemory *> physmem;
93    SimObjectParam<DiskImage *> disk;
94
95END_DECLARE_SIM_OBJECT_PARAMS(SimpleDisk)
96
97BEGIN_INIT_SIM_OBJECT_PARAMS(SimpleDisk)
98
99    INIT_PARAM(physmem, "Physical Memory"),
100    INIT_PARAM(disk, "Disk Image")
101
102END_INIT_SIM_OBJECT_PARAMS(SimpleDisk)
103
104CREATE_SIM_OBJECT(SimpleDisk)
105{
106    return new SimpleDisk(getInstanceName(), physmem, disk);
107}
108
109REGISTER_SIM_OBJECT("SimpleDisk", SimpleDisk)
110