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+/*
+ * Copyright (c) 2003 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 <algorithm>
+#include <map>
+#include <string>
+#include <utility>
+
+#include "debug.hh"
+#include "exec_context.hh"
+#include "pc_event.hh"
+#include "trace.hh"
+#include "universe.hh"
+
+#ifdef FULL_SYSTEM
+#include "arguments.hh"
+#include "pmap.h"
+#include "kernel.hh"
+#include "memory_control.hh"
+#include "cpu.hh"
+#include "system.hh"
+#include "bpred.hh"
+#endif
+
+using namespace std;
+
+PCEventQueue::PCEventQueue()
+{}
+
+PCEventQueue::~PCEventQueue()
+{}
+
+bool
+PCEventQueue::remove(PCEvent *event)
+{
+ int removed = 0;
+ range_t range = equal_range(event);
+ for (iterator i = range.first; i != range.second; ++i) {
+ if (*i == event) {
+ DPRINTF(PCEvent, "PC based event removed at %#x: %s\n",
+ event->pc(), event->descr());
+ pc_map.erase(i);
+ ++removed;
+ }
+ }
+
+ return removed > 0;
+}
+
+bool
+PCEventQueue::schedule(PCEvent *event)
+{
+ pc_map.push_back(event);
+ sort(pc_map.begin(), pc_map.end(), MapCompare());
+
+ DPRINTF(PCEvent, "PC based event scheduled for %#x: %s\n",
+ event->pc(), event->descr());
+
+ return true;
+}
+
+bool
+PCEventQueue::service(ExecContext *xc)
+{
+ Addr pc = xc->regs.pc;
+ int serviced = 0;
+ range_t range = equal_range(pc);
+ for (iterator i = range.first; i != range.second; ++i) {
+ // Make sure that the pc wasn't changed as the side effect of
+ // another event. This for example, prevents two invocations
+ // of the SkipFuncEvent. Maybe we should have separate PC
+ // event queues for each processor?
+ if (pc != xc->regs.pc)
+ continue;
+
+ DPRINTF(PCEvent, "PC based event serviced at %#x: %s\n",
+ (*i)->pc(), (*i)->descr());
+
+ (*i)->process(xc);
+ ++serviced;
+ }
+
+ return serviced > 0;
+}
+
+void
+PCEventQueue::dump() const
+{
+ const_iterator i = pc_map.begin();
+ const_iterator e = pc_map.end();
+
+ for (; i != e; ++i)
+ cprintf("%d: event at %#x: %s\n", curTick, (*i)->pc(),
+ (*i)->descr());
+}
+
+PCEventQueue::range_t
+PCEventQueue::equal_range(Addr pc)
+{
+ return std::equal_range(pc_map.begin(), pc_map.end(), pc, MapCompare());
+}
+
+#ifdef FULL_SYSTEM
+void
+SkipFuncEvent::process(ExecContext *xc)
+{
+ Addr newpc = xc->regs.intRegFile[ReturnAddressReg];
+
+ DPRINTF(PCEvent, "skipping %s: pc=%x, newpc=%x\n", description,
+ xc->regs.pc, newpc);
+
+ xc->regs.pc = newpc;
+ xc->regs.npc = xc->regs.pc + sizeof(MachInst);
+
+ BranchPred *bp = xc->cpu->getBranchPred();
+ if (bp != NULL) {
+ bp->popRAS(xc->thread_num);
+ }
+}
+
+void
+BadAddrEvent::process(ExecContext *xc)
+{
+ // The following gross hack is the equivalent function to the
+ // annotation for vmunix::badaddr in:
+ // simos/simulation/apps/tcl/osf/tlaser.tcl
+
+ uint64_t a0 = xc->regs.intRegFile[ArgumentReg0];
+
+ if (a0 < ALPHA_K0SEG_BASE || a0 >= ALPHA_K1SEG_BASE ||
+ xc->memCtrl->badaddr(ALPHA_K0SEG_TO_PHYS(a0) & PA_IMPL_MASK)) {
+
+ DPRINTF(BADADDR, "badaddr arg=%#x bad\n", a0);
+ xc->regs.intRegFile[ReturnValueReg] = 0x1;
+ SkipFuncEvent::process(xc);
+ }
+ else
+ DPRINTF(BADADDR, "badaddr arg=%#x good\n", a0);
+}
+
+void
+PrintfEvent::process(ExecContext *xc)
+{
+ if (DTRACE(Printf)) {
+ DebugOut() << curTick << ": " << xc->cpu->name() << ": ";
+
+ AlphaArguments args(xc);
+ Kernel::Printf(args);
+ }
+}
+
+void
+DebugPrintfEvent::process(ExecContext *xc)
+{
+ if (DTRACE(DebugPrintf)) {
+ if (!raw)
+ DebugOut() << curTick << ": " << xc->cpu->name() << ": ";
+
+ AlphaArguments args(xc);
+ Kernel::Printf(args);
+ }
+}
+
+void
+DumpMbufEvent::process(ExecContext *xc)
+{
+ if (DTRACE(DebugPrintf)) {
+ AlphaArguments args(xc);
+ Kernel::DumpMbuf(args);
+ }
+}
+#endif
+
+BreakPCEvent::BreakPCEvent(PCEventQueue *q, const std::string &desc, bool del)
+ : PCEvent(q, desc), remove(del)
+{
+}
+
+void
+BreakPCEvent::process(ExecContext *xc)
+{
+ debug_break();
+ if (remove)
+ delete this;
+}
+
+#ifdef FULL_SYSTEM
+extern "C"
+void
+sched_break_pc_sys(System *sys, Addr addr)
+{
+ PCEvent *event = new BreakPCEvent(&sys->pcEventQueue, "debug break", true);
+ event->schedule(addr);
+}
+
+extern "C"
+void
+sched_break_pc(Addr addr)
+{
+ for (vector<System *>::iterator sysi = System::systemList.begin();
+ sysi != System::systemList.end(); ++sysi) {
+ sched_break_pc_sys(*sysi, addr);
+ }
+
+}
+#endif