1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/*
* Copyright (c) 2009-2012 ARM Limited
* All rights reserved.
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Ali Saidi
*/
#include "arch/arm/faults.hh"
#include "arch/arm/isa_traits.hh"
#include "arch/arm/tlb.hh"
#include "arch/arm/utility.hh"
#include "arch/arm/vtophys.hh"
#include "cpu/checker/cpu.hh"
#include "cpu/base.hh"
#include "cpu/thread_context.hh"
#include "mem/fs_translating_port_proxy.hh"
#include "sim/full_system.hh"
namespace ArmISA {
void
initCPU(ThreadContext *tc, int cpuId)
{
// Reset CP15?? What does that mean -- ali
// FPEXC.EN = 0
static Fault reset = new Reset;
reset->invoke(tc);
}
uint64_t
getArgument(ThreadContext *tc, int &number, uint16_t size, bool fp)
{
if (!FullSystem) {
panic("getArgument() only implemented for full system mode.\n");
M5_DUMMY_RETURN
}
if (size == (uint16_t)(-1))
size = ArmISA::MachineBytes;
if (fp)
panic("getArgument(): Floating point arguments not implemented\n");
if (number < NumArgumentRegs) {
// If the argument is 64 bits, it must be in an even regiser
// number. Increment the number here if it isn't even.
if (size == sizeof(uint64_t)) {
if ((number % 2) != 0)
number++;
// Read the two halves of the data. Number is inc here to
// get the second half of the 64 bit reg.
uint64_t tmp;
tmp = tc->readIntReg(number++);
tmp |= tc->readIntReg(number) << 32;
return tmp;
} else {
return tc->readIntReg(number);
}
} else {
Addr sp = tc->readIntReg(StackPointerReg);
FSTranslatingPortProxy &vp = tc->getVirtProxy();
uint64_t arg;
if (size == sizeof(uint64_t)) {
// If the argument is even it must be aligned
if ((number % 2) != 0)
number++;
arg = vp.read<uint64_t>(sp +
(number-NumArgumentRegs) * sizeof(uint32_t));
// since two 32 bit args == 1 64 bit arg, increment number
number++;
} else {
arg = vp.read<uint32_t>(sp +
(number-NumArgumentRegs) * sizeof(uint32_t));
}
return arg;
}
}
void
skipFunction(ThreadContext *tc)
{
TheISA::PCState newPC = tc->pcState();
newPC.set(tc->readIntReg(ReturnAddressReg) & ~ULL(1));
CheckerCPU *checker = tc->getCheckerCpuPtr();
if (checker) {
tc->pcStateNoRecord(newPC);
} else {
tc->pcState(newPC);
}
}
void
copyRegs(ThreadContext *src, ThreadContext *dest)
{
for (int i = 0; i < TheISA::NumIntRegs; i++)
dest->setIntRegFlat(i, src->readIntRegFlat(i));
for (int i = 0; i < TheISA::NumFloatRegs; i++)
dest->setFloatRegFlat(i, src->readFloatRegFlat(i));
for (int i = 0; i < TheISA::NumMiscRegs; i++)
dest->setMiscRegNoEffect(i, src->readMiscRegNoEffect(i));
// setMiscReg "with effect" will set the misc register mapping correctly.
// e.g. updateRegMap(val)
dest->setMiscReg(MISCREG_CPSR, src->readMiscRegNoEffect(MISCREG_CPSR));
// Copy over the PC State
dest->pcState(src->pcState());
// Invalidate the tlb misc register cache
dest->getITBPtr()->invalidateMiscReg();
dest->getDTBPtr()->invalidateMiscReg();
}
Addr
truncPage(Addr addr)
{
return addr & ~(PageBytes - 1);
}
Addr
roundPage(Addr addr)
{
return (addr + PageBytes - 1) & ~(PageBytes - 1);
}
} // namespace ArmISA
|
