2 * Copyright (c) 2006 The Regents of The University of Michigan
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.
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.
32 * This device acts as a disk similar to the memory mapped disk device
33 * in legion. Any access is translated to an offset in the disk image.
38 #include "base/trace.hh"
39 #include "dev/sparc/mm_disk.hh"
40 #include "dev/platform.hh"
41 #include "mem/port.hh"
42 #include "mem/packet_access.hh"
43 #include "sim/builder.hh"
44 #include "sim/byteswap.hh"
45 #include "sim/system.hh"
47 MmDisk::MmDisk(Params
*p
)
48 : BasicPioDevice(p
), image(p
->image
), curSector((uint64_t)-1), dirty(false)
50 std::memset(&bytes
, 0, SectorSize
);
51 pioSize
= image
->size() * SectorSize
;
55 MmDisk::read(PacketPtr pkt
)
64 assert(pkt
->result
== Packet::Unknown
);
65 assert(pkt
->getAddr() >= pioAddr
&& pkt
->getAddr() < pioAddr
+ pioSize
);
66 accessAddr
= pkt
->getAddr() - pioAddr
;
68 sector
= accessAddr
/ SectorSize
;
70 if (sector
!= curSector
) {
72 bytes_read
= image
->write(bytes
, curSector
);
73 bytes_read
= image
->read(bytes
, sector
);
76 switch (pkt
->getSize()) {
78 pkt
->set(bytes
[accessAddr
% SectorSize
]);
80 case sizeof(uint16_t):
81 d16
= (uint16_t*)bytes
+ (accessAddr
% SectorSize
)/2;
82 pkt
->set(htobe(*d16
));
84 case sizeof(uint32_t):
85 d32
= (uint32_t*)bytes
+ (accessAddr
% SectorSize
)/4;
86 pkt
->set(htobe(*d32
));
88 case sizeof(uint64_t):
89 d64
= (uint64_t*)bytes
+ (accessAddr
% SectorSize
)/8;
90 pkt
->set(htobe(*d64
));
93 panic("Invalid access size\n");
96 pkt
->result
= Packet::Success
;
101 MmDisk::write(PacketPtr pkt
)
103 panic("need to implement\n");
108 BEGIN_DECLARE_SIM_OBJECT_PARAMS(MmDisk
)
109 Param
<Addr
> pio_addr
;
110 Param
<Tick
> pio_latency
;
111 Param
<Addr
> pio_size
;
112 SimObjectParam
<Platform
*> platform
;
113 SimObjectParam
<System
*> system
;
114 SimObjectParam
<DiskImage
*> image
;
115 END_DECLARE_SIM_OBJECT_PARAMS(MmDisk
)
117 BEGIN_INIT_SIM_OBJECT_PARAMS(MmDisk
)
119 INIT_PARAM(pio_addr
, "Device Address"),
120 INIT_PARAM(pio_latency
, "Programmed IO latency"),
121 INIT_PARAM(pio_size
, "Size of address range"),
122 INIT_PARAM(platform
, "platform"),
123 INIT_PARAM(system
, "system object"),
124 INIT_PARAM(image
, "disk image")
126 END_INIT_SIM_OBJECT_PARAMS(MmDisk
)
128 CREATE_SIM_OBJECT(MmDisk
)
130 MmDisk::Params
*p
= new MmDisk::Params
;
131 p
->name
= getInstanceName();
132 p
->pio_addr
= pio_addr
;
133 p
->pio_delay
= pio_latency
;
134 p
->platform
= platform
;
137 return new MmDisk(p
);
140 REGISTER_SIM_OBJECT("MmDisk", MmDisk
)