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authorGabe Black <gblack@eecs.umich.edu>2009-04-19 03:56:24 -0700
committerGabe Black <gblack@eecs.umich.edu>2009-04-19 03:56:24 -0700
commit4d32cd10ce5543fcec1ffb21d5e66c510d29e24d (patch)
tree205a0c82dfe1088338dc55026097cd42ea8eac71 /src/arch/x86
parentbdda224d4110dd8ebb6224bfa9bc2641957a8c57 (diff)
downloadgem5-4d32cd10ce5543fcec1ffb21d5e66c510d29e24d.tar.xz
X86: Use recvResponse to implement the idle bit in the Local APIC ICR.
Diffstat (limited to 'src/arch/x86')
-rw-r--r--src/arch/x86/interrupts.cc19
1 files changed, 19 insertions, 0 deletions
diff --git a/src/arch/x86/interrupts.cc b/src/arch/x86/interrupts.cc
index 9ac4b20ba..c247d9ebc 100644
--- a/src/arch/x86/interrupts.cc
+++ b/src/arch/x86/interrupts.cc
@@ -332,6 +332,22 @@ X86ISA::Interrupts::recvMessage(PacketPtr pkt)
}
+Tick
+X86ISA::Interrupts::recvResponse(PacketPtr pkt)
+{
+ assert(!pkt->isError());
+ assert(pkt->cmd == MemCmd::MessageResp);
+ InterruptCommandRegLow low = regs[APIC_INTERRUPT_COMMAND_LOW];
+ // Record that the ICR is now idle.
+ low.deliveryStatus = 0;
+ regs[APIC_INTERRUPT_COMMAND_LOW] = low;
+ delete pkt->req;
+ delete pkt;
+ DPRINTF(LocalApic, "ICR is now idle.\n");
+ return 0;
+}
+
+
void
X86ISA::Interrupts::addressRanges(AddrRangeList &range_list)
{
@@ -475,9 +491,12 @@ X86ISA::Interrupts::setReg(ApicRegIndex reg, uint32_t val)
message.level = low.level;
message.trigger = low.trigger;
bool timing = sys->getMemoryMode() == Enums::timing;
+ // Be careful no updates of the delivery status bit get lost.
+ regs[APIC_INTERRUPT_COMMAND_LOW] = low;
switch (low.destShorthand) {
case 0:
intPort->sendMessage(message, timing);
+ newVal = regs[APIC_INTERRUPT_COMMAND_LOW];
break;
case 1:
panic("Self IPIs aren't implemented.\n");