From 935ba67b4fbe595c0496e0230e39cd8ed87b7543 Mon Sep 17 00:00:00 2001
From: Steve Reinhardt <stever@eecs.umich.edu>
Date: Wed, 17 May 2006 22:08:44 -0400
Subject: Get basic full-system working with AtomicSimpleCPU.

SConscript:
    Comment out sinic for now... needs to be fixed to compile under newmem.
configs/test/SysPaths.py:
    Fix paths.
configs/test/fs.py:
    SimpleCPU -> AtomicSimpleCPU
    Fix vmlinux path
cpu/simple/atomic.cc:
    Fix suspendContext() so quiesce works.
    Don't forget to checkForInterrupts().
cpu/simple/base.cc:
    Minor fix to interrupt check code.
dev/ide_disk.hh:
    Don't declare regStats() in header since it's not in
    .cc file anymore (will need to add it back in when
    stats are added back).
dev/io_device.cc:
    Set packet dest to Packet::Broadcast.
dev/pciconfigall.cc:
    Set PCI config packet result to Success.
python/m5/objects/Root.py:
    Add debug object to Root so things like break_cycles
    can be set from command line.

--HG--
extra : convert_revision : aa1c652fe589784e753e13ad9acb0cd5f3b6eafb
---
 cpu/simple/atomic.cc | 15 ++++++++++++---
 cpu/simple/base.cc   |  3 +--
 2 files changed, 13 insertions(+), 5 deletions(-)

(limited to 'cpu')

diff --git a/cpu/simple/atomic.cc b/cpu/simple/atomic.cc
index 8c38fe0d4..35a69cd4a 100644
--- a/cpu/simple/atomic.cc
+++ b/cpu/simple/atomic.cc
@@ -100,6 +100,9 @@ AtomicSimpleCPU::CpuPort::recvFunctional(Packet &pkt)
 void
 AtomicSimpleCPU::CpuPort::recvStatusChange(Status status)
 {
+    if (status == RangeChange)
+        return;
+
     panic("AtomicSimpleCPU doesn't expect recvStatusChange callback!");
 }
 
@@ -227,10 +230,13 @@ AtomicSimpleCPU::suspendContext(int thread_num)
     assert(cpuXC);
 
     assert(_status == Running);
-    assert(tickEvent.scheduled());
+
+    // tick event may not be scheduled if this gets called from inside
+    // an instruction's execution, e.g. "quiesce"
+    if (tickEvent.scheduled())
+        tickEvent.deschedule();
 
     notIdleFraction--;
-    tickEvent.deschedule();
     _status = Idle;
 }
 
@@ -417,6 +423,8 @@ AtomicSimpleCPU::tick()
     for (int i = 0; i < width; ++i) {
         numCycles++;
 
+        checkForInterrupts();
+
         ifetch_req->resetMin();
         ifetch_pkt->reset();
         Fault fault = setupFetchPacket(ifetch_pkt);
@@ -452,7 +460,8 @@ AtomicSimpleCPU::tick()
         advancePC(fault);
     }
 
-    tickEvent.schedule(curTick + latency);
+    if (_status != Idle)
+        tickEvent.schedule(curTick + latency);
 }
 
 
diff --git a/cpu/simple/base.cc b/cpu/simple/base.cc
index 40868e74d..30c002ed5 100644
--- a/cpu/simple/base.cc
+++ b/cpu/simple/base.cc
@@ -307,8 +307,7 @@ void
 BaseSimpleCPU::checkForInterrupts()
 {
 #if FULL_SYSTEM
-    if (checkInterrupts && check_interrupts() && !cpuXC->inPalMode() &&
-        status() != IcacheAccessComplete) {
+    if (checkInterrupts && check_interrupts() && !cpuXC->inPalMode()) {
         int ipl = 0;
         int summary = 0;
         checkInterrupts = false;
-- 
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