2 * Copyright (c) 2003 The Regents of The University of Michigan
5 * Redistribution and use in source and binary forms, with or without
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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
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19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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31 #include "cpu/base_cpu.hh"
32 #include "cpu/exec_context.hh"
35 #include "sim/system.hh"
37 #include "sim/process.hh"
44 ExecContext::ExecContext(BaseCPU
*_cpu
, int _thread_num
, System
*_sys
,
45 AlphaItb
*_itb
, AlphaDtb
*_dtb
,
46 FunctionalMemory
*_mem
)
47 : _status(ExecContext::Unallocated
),
48 kernelStats(this, _cpu
), cpu(_cpu
), thread_num(_thread_num
),
49 cpu_id(-1), mem(_mem
), itb(_itb
), dtb(_dtb
), system(_sys
),
50 memCtrl(_sys
->memCtrl
), physmem(_sys
->physmem
),
51 swCtx(NULL
), func_exe_inst(0), storeCondFailures(0)
53 memset(®s
, 0, sizeof(RegFile
));
56 ExecContext::ExecContext(BaseCPU
*_cpu
, int _thread_num
,
57 Process
*_process
, int _asid
)
58 : _status(ExecContext::Unallocated
),
59 cpu(_cpu
), thread_num(_thread_num
), cpu_id(-1),
60 process(_process
), mem(process
->getMemory()), asid(_asid
),
61 func_exe_inst(0), storeCondFailures(0)
65 ExecContext::ExecContext(BaseCPU
*_cpu
, int _thread_num
,
66 FunctionalMemory
*_mem
, int _asid
)
67 : cpu(_cpu
), thread_num(_thread_num
), process(0), mem(_mem
), asid(_asid
),
68 func_exe_inst(0), storeCondFailures(0)
75 ExecContext::takeOverFrom(ExecContext
*oldContext
)
77 // some things should already be set up
78 assert(mem
== oldContext
->mem
);
80 assert(system
== oldContext
->system
);
82 assert(process
== oldContext
->process
);
85 // copy over functional state
86 _status
= oldContext
->_status
;
88 kernelStats
= oldContext
->kernelStats
;
90 regs
= oldContext
->regs
;
91 cpu_id
= oldContext
->cpu_id
;
92 func_exe_inst
= oldContext
->func_exe_inst
;
94 storeCondFailures
= 0;
96 oldContext
->_status
= ExecContext::Unallocated
;
101 ExecContext::serialize(ostream
&os
)
103 SERIALIZE_ENUM(_status
);
105 // thread_num and cpu_id are deterministic from the config
106 SERIALIZE_SCALAR(func_exe_inst
);
111 SERIALIZE_SCALAR(ctx
);
112 SERIALIZE_SCALAR(swCtx
->calls
);
113 std::stack
<fnCall
*> *stack
= &(swCtx
->callStack
);
115 int size
= stack
->size();
116 SERIALIZE_SCALAR(size
);
118 for (int j
=0; j
<size
; ++j
) {
120 paramOut(os
, csprintf("stackpos[%d]",j
), top
->name
);
123 SERIALIZE_SCALAR(ctx
);
126 Statistics::MainBin
*cur
= Statistics::MainBin::curBin();
127 string bin_name
= cur
->name();
128 SERIALIZE_SCALAR(bin_name
);
134 ExecContext::unserialize(Checkpoint
*cp
, const std::string
§ion
)
136 UNSERIALIZE_ENUM(_status
);
137 regs
.unserialize(cp
, section
);
138 // thread_num and cpu_id are deterministic from the config
139 UNSERIALIZE_SCALAR(func_exe_inst
);
142 UNSERIALIZE_SCALAR(ctx
);
144 swCtx
= new SWContext
;
145 UNSERIALIZE_SCALAR(swCtx
->calls
);
147 UNSERIALIZE_SCALAR(size
);
148 fnCall
*call
= new fnCall
[size
];
149 for (int i
=0; i
<size
; ++i
) {
150 paramIn(cp
, section
, csprintf("stackpos[%d]",i
), call
[i
].name
);
151 call
[i
].myBin
= system
->getBin(call
[i
].name
);
154 for (int i
=size
-1; i
>=0; --i
) {
155 swCtx
->callStack
.push(&(call
[i
]));
162 UNSERIALIZE_SCALAR(bin_name
);
163 system
->getBin(bin_name
)->activate();
169 ExecContext::activate(int delay
)
171 if (status() == Active
)
175 cpu
->activateContext(thread_num
, delay
);
179 ExecContext::suspend()
181 if (status() == Suspended
)
185 // Don't change the status from active if there are pending interrupts
186 if (cpu
->check_interrupts()) {
187 assert(status() == Active
);
193 cpu
->suspendContext(thread_num
);
197 ExecContext::deallocate()
199 if (status() == Unallocated
)
202 _status
= Unallocated
;
203 cpu
->deallocateContext(thread_num
);
209 if (status() == Halted
)
213 cpu
->haltContext(thread_num
);
218 ExecContext::regStats(const string
&name
)
221 kernelStats
.regStats(name
+ ".kern");