2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
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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
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26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 * Isa Fake Device implementation
35 #include "base/trace.hh"
36 #include "debug/IsaFake.hh"
37 #include "dev/isa_fake.hh"
38 #include "mem/packet.hh"
39 #include "mem/packet_access.hh"
40 #include "sim/system.hh"
44 IsaFake::IsaFake(Params
*p
)
48 pioSize
= p
->pio_size
;
50 retData8
= p
->ret_data8
;
51 retData16
= p
->ret_data16
;
52 retData32
= p
->ret_data32
;
53 retData64
= p
->ret_data64
;
57 IsaFake::read(PacketPtr pkt
)
60 pkt
->makeAtomicResponse();
62 if (params()->warn_access
!= "")
63 warn("Device %s accessed by read to address %#x size=%d\n",
64 name(), pkt
->getAddr(), pkt
->getSize());
65 if (params()->ret_bad_addr
) {
66 DPRINTF(IsaFake
, "read to bad address va=%#x size=%d\n",
67 pkt
->getAddr(), pkt
->getSize());
70 assert(pkt
->getAddr() >= pioAddr
&& pkt
->getAddr() < pioAddr
+ pioSize
);
71 DPRINTF(IsaFake
, "read va=%#x size=%d\n",
72 pkt
->getAddr(), pkt
->getSize());
73 switch (pkt
->getSize()) {
74 case sizeof(uint64_t):
77 case sizeof(uint32_t):
80 case sizeof(uint16_t):
87 if (params()->fake_mem
)
88 std::memset(pkt
->getPtr
<uint8_t>(), 0, pkt
->getSize());
90 panic("invalid access size! Device being accessed by cache?\n");
97 IsaFake::write(PacketPtr pkt
)
99 pkt
->makeAtomicResponse();
100 if (params()->warn_access
!= "") {
102 switch (pkt
->getSize()) {
103 case sizeof(uint64_t):
104 data
= pkt
->get
<uint64_t>();
106 case sizeof(uint32_t):
107 data
= pkt
->get
<uint32_t>();
109 case sizeof(uint16_t):
110 data
= pkt
->get
<uint16_t>();
112 case sizeof(uint8_t):
113 data
= pkt
->get
<uint8_t>();
116 panic("invalid access size!\n");
118 warn("Device %s accessed by write to address %#x size=%d data=%#x\n",
119 name(), pkt
->getAddr(), pkt
->getSize(), data
);
121 if (params()->ret_bad_addr
) {
122 DPRINTF(IsaFake
, "write to bad address va=%#x size=%d \n",
123 pkt
->getAddr(), pkt
->getSize());
124 pkt
->setBadAddress();
126 DPRINTF(IsaFake
, "write - va=%#x size=%d \n",
127 pkt
->getAddr(), pkt
->getSize());
129 if (params()->update_data
) {
130 switch (pkt
->getSize()) {
131 case sizeof(uint64_t):
132 retData64
= pkt
->get
<uint64_t>();
134 case sizeof(uint32_t):
135 retData32
= pkt
->get
<uint32_t>();
137 case sizeof(uint16_t):
138 retData16
= pkt
->get
<uint16_t>();
140 case sizeof(uint8_t):
141 retData8
= pkt
->get
<uint8_t>();
144 panic("invalid access size!\n");
152 IsaFakeParams::create()
154 return new IsaFake(this);