summaryrefslogtreecommitdiff
path: root/cpu/cpu_exec_context.cc
diff options
context:
space:
mode:
Diffstat (limited to 'cpu/cpu_exec_context.cc')
-rw-r--r--cpu/cpu_exec_context.cc262
1 files changed, 262 insertions, 0 deletions
diff --git a/cpu/cpu_exec_context.cc b/cpu/cpu_exec_context.cc
new file mode 100644
index 000000000..2fb3d5d53
--- /dev/null
+++ b/cpu/cpu_exec_context.cc
@@ -0,0 +1,262 @@
+/*
+ * Copyright (c) 2001-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * 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.
+ */
+
+#include <string>
+
+#include "cpu/base.hh"
+#include "cpu/cpu_exec_context.hh"
+#include "cpu/exec_context.hh"
+
+#if FULL_SYSTEM
+#include "base/callback.hh"
+#include "base/cprintf.hh"
+#include "base/output.hh"
+#include "cpu/profile.hh"
+#include "kern/kernel_stats.hh"
+#include "sim/serialize.hh"
+#include "sim/sim_exit.hh"
+#include "sim/system.hh"
+#include "targetarch/stacktrace.hh"
+#else
+#include "sim/process.hh"
+#endif
+
+using namespace std;
+
+// constructor
+#if FULL_SYSTEM
+CPUExecContext::CPUExecContext(BaseCPU *_cpu, int _thread_num, System *_sys,
+ AlphaITB *_itb, AlphaDTB *_dtb,
+ FunctionalMemory *_mem)
+ : _status(ExecContext::Unallocated), cpu(_cpu), thread_num(_thread_num),
+ cpu_id(-1), mem(_mem), itb(_itb), dtb(_dtb), system(_sys),
+ memctrl(_sys->memctrl), physmem(_sys->physmem), profile(NULL),
+ func_exe_inst(0), storeCondFailures(0)
+{
+ proxy = new ProxyExecContext<CPUExecContext>(this);
+
+ memset(&regs, 0, sizeof(RegFile));
+
+ if (cpu->params->profile) {
+ profile = new FunctionProfile(system->kernelSymtab);
+ Callback *cb =
+ new MakeCallback<CPUExecContext,
+ &CPUExecContext::dumpFuncProfile>(this);
+ registerExitCallback(cb);
+ }
+
+ // let's fill with a dummy node for now so we don't get a segfault
+ // on the first cycle when there's no node available.
+ static ProfileNode dummyNode;
+ profileNode = &dummyNode;
+ profilePC = 3;
+}
+#else
+CPUExecContext::CPUExecContext(BaseCPU *_cpu, int _thread_num,
+ Process *_process, int _asid)
+ : _status(ExecContext::Unallocated),
+ cpu(_cpu), thread_num(_thread_num), cpu_id(-1),
+ process(_process), mem(process->getMemory()), asid(_asid),
+ func_exe_inst(0), storeCondFailures(0)
+{
+ memset(&regs, 0, sizeof(RegFile));
+ proxy = new ProxyExecContext<CPUExecContext>(this);
+}
+
+CPUExecContext::CPUExecContext(BaseCPU *_cpu, int _thread_num,
+ FunctionalMemory *_mem, int _asid)
+ : cpu(_cpu), thread_num(_thread_num), process(0), mem(_mem), asid(_asid),
+ func_exe_inst(0), storeCondFailures(0)
+{
+ memset(&regs, 0, sizeof(RegFile));
+ proxy = new ProxyExecContext<CPUExecContext>(this);
+}
+
+CPUExecContext::CPUExecContext(RegFile *regFile)
+ : cpu(NULL), thread_num(-1), process(NULL), mem(NULL), asid(-1),
+ func_exe_inst(0), storeCondFailures(0)
+{
+ regs = *regFile;
+ proxy = new ProxyExecContext<CPUExecContext>(this);
+}
+
+#endif
+
+CPUExecContext::~CPUExecContext()
+{
+ delete proxy;
+}
+
+#if FULL_SYSTEM
+void
+CPUExecContext::dumpFuncProfile()
+{
+ std::ostream *os = simout.create(csprintf("profile.%s.dat", cpu->name()));
+ profile->dump(proxy, *os);
+}
+#endif
+
+void
+CPUExecContext::takeOverFrom(ExecContext *oldContext)
+{
+/*
+ // some things should already be set up
+ assert(mem == oldContext->mem);
+#if FULL_SYSTEM
+ assert(system == oldContext->system);
+#else
+ assert(process == oldContext->process);
+#endif
+
+ // copy over functional state
+ _status = oldContext->_status;
+ regs = oldContext->regs;
+ cpu_id = oldContext->cpu_id;
+ func_exe_inst = oldContext->func_exe_inst;
+
+ storeCondFailures = 0;
+
+ oldContext->_status = CPUExecContext::Unallocated;
+*/
+}
+
+void
+CPUExecContext::serialize(ostream &os)
+{
+ SERIALIZE_ENUM(_status);
+ regs.serialize(os);
+ // thread_num and cpu_id are deterministic from the config
+ SERIALIZE_SCALAR(func_exe_inst);
+ SERIALIZE_SCALAR(inst);
+}
+
+
+void
+CPUExecContext::unserialize(Checkpoint *cp, const std::string &section)
+{
+ UNSERIALIZE_ENUM(_status);
+ regs.unserialize(cp, section);
+ // thread_num and cpu_id are deterministic from the config
+ UNSERIALIZE_SCALAR(func_exe_inst);
+ UNSERIALIZE_SCALAR(inst);
+}
+
+
+void
+CPUExecContext::activate(int delay)
+{
+ if (status() == ExecContext::Active)
+ return;
+
+ _status = ExecContext::Active;
+ cpu->activateContext(thread_num, delay);
+}
+
+void
+CPUExecContext::suspend()
+{
+ if (status() == ExecContext::Suspended)
+ return;
+
+#if FULL_SYSTEM
+ // Don't change the status from active if there are pending interrupts
+ if (cpu->check_interrupts()) {
+ assert(status() == ExecContext::Active);
+ return;
+ }
+#endif
+
+ _status = ExecContext::Suspended;
+ cpu->suspendContext(thread_num);
+}
+
+void
+CPUExecContext::deallocate()
+{
+ if (status() == ExecContext::Unallocated)
+ return;
+
+ _status = ExecContext::Unallocated;
+ cpu->deallocateContext(thread_num);
+}
+
+void
+CPUExecContext::halt()
+{
+ if (status() == ExecContext::Halted)
+ return;
+
+ _status = ExecContext::Halted;
+ cpu->haltContext(thread_num);
+}
+
+
+void
+CPUExecContext::regStats(const string &name)
+{
+}
+
+void
+CPUExecContext::copyArchRegs(ExecContext *xc)
+{
+ // First loop through the integer registers.
+ for (int i = 0; i < AlphaISA::NumIntRegs; ++i) {
+ setIntReg(i, xc->readIntReg(i));
+ }
+
+ // Then loop through the floating point registers.
+ for (int i = 0; i < AlphaISA::NumFloatRegs; ++i) {
+ setFloatRegDouble(i, xc->readFloatRegDouble(i));
+ setFloatRegInt(i, xc->readFloatRegInt(i));
+ }
+
+ // Copy misc. registers
+ setMiscReg(AlphaISA::Fpcr_DepTag, xc->readMiscReg(AlphaISA::Fpcr_DepTag));
+ setMiscReg(AlphaISA::Uniq_DepTag, xc->readMiscReg(AlphaISA::Uniq_DepTag));
+ setMiscReg(AlphaISA::Lock_Flag_DepTag,
+ xc->readMiscReg(AlphaISA::Lock_Flag_DepTag));
+ setMiscReg(AlphaISA::Lock_Addr_DepTag,
+ xc->readMiscReg(AlphaISA::Lock_Addr_DepTag));
+
+ // Lastly copy PC/NPC
+ setPC(xc->readPC());
+ setNextPC(xc->readNextPC());
+}
+
+void
+CPUExecContext::trap(Fault fault)
+{
+ //TheISA::trap(fault); //One possible way to do it...
+
+ /** @todo: Going to hack it for now. Do a true fixup later. */
+#if FULL_SYSTEM
+ ev5_trap(fault);
+#else
+ fatal("fault (%d) detected @ PC 0x%08p", fault, readPC());
+#endif
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-26 09:22:51 +0000