simple_disk.cc revision 2 
1/*
2 * Copyright (c) 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 <string>
34
35#include <sys/types.h>
36#include <sys/uio.h>
37#include <fcntl.h>
38#include <string.h>
39#include <unistd.h>
40
41#include "disk_image.hh"
42#include "misc.hh"
43#include "physical_memory.hh"
44#include "simple_disk.hh"
45#include "trace.hh"
46
47using namespace std;
48
49SimpleDisk::SimpleDisk(const string &name, PhysicalMemory *pmem,
50                       DiskImage *img)
51    : SimObject(name), physmem(pmem), image(img)
52{}
53
54SimpleDisk::~SimpleDisk()
55{}
56
57
58void
59SimpleDisk::read(Addr addr, baddr_t block, int count) const
60{
61    uint8_t *data = physmem->dma_addr(addr, count);
62    if (!data)
63        panic("dma out of range! read addr=%#x count=%d\n", addr, count);
64
65    if (count & (SectorSize - 1))
66        panic("Not reading a multiple of a sector (count = %d)", count);
67
68    for (int i = 0, j = 0; i < count; i += SectorSize, j++)
69        image->read(data + i, block + j);
70
71    DPRINTF(SimpleDisk, "read  block=%#x len=%d\n", (uint64_t)block, count);
72    DDUMP(SimpleDiskData, data, count);
73}
74
75void
76SimpleDisk::write(Addr addr, baddr_t block, int count)
77{
78    panic("unimplemented!\n");
79
80#if 0
81    uint8_t *data = physmem->dma_addr(addr, count);
82    if (!data)
83        panic("dma out of range! write addr=%#x count=%d\n", addr, count);
84
85    image->write(data, block, count);
86#endif
87}
88
89BEGIN_DECLARE_SIM_OBJECT_PARAMS(SimpleDisk)
90
91    SimObjectParam<PhysicalMemory *> physmem;
92    SimObjectParam<DiskImage *> disk;
93
94END_DECLARE_SIM_OBJECT_PARAMS(SimpleDisk)
95
96BEGIN_INIT_SIM_OBJECT_PARAMS(SimpleDisk)
97
98    INIT_PARAM(physmem, "Physical Memory"),
99    INIT_PARAM(disk, "Disk Image")
100
101END_INIT_SIM_OBJECT_PARAMS(SimpleDisk)
102
103CREATE_SIM_OBJECT(SimpleDisk)
104{
105    return new SimpleDisk(getInstanceName(), physmem, disk);
106}
107
108REGISTER_SIM_OBJECT("SimpleDisk", SimpleDisk)
109