* 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.
- *
- * Authors: Gabe Black
*/
+#include "dev/x86/i8259.hh"
+
#include "base/bitfield.hh"
+#include "base/trace.hh"
+#include "debug/I8259.hh"
#include "dev/x86/i82094aa.hh"
-#include "dev/x86/i8259.hh"
#include "mem/packet.hh"
#include "mem/packet_access.hh"
-X86ISA::I8259::I8259(Params * p) : BasicPioDevice(p), IntDev(this),
- latency(p->pio_latency), output(p->output),
- mode(p->mode), slave(NULL),
- IRR(0), ISR(0), IMR(0),
- readIRR(true), initControlWord(0), autoEOI(false)
+X86ISA::I8259::I8259(Params * p)
+ : BasicPioDevice(p, 2),
+ latency(p->pio_latency),
+ mode(p->mode), slave(p->slave),
+ IRR(0), ISR(0), IMR(0),
+ readIRR(true), initControlWord(0), autoEOI(false)
{
- if (output) {
- I8259 * master;
- master = dynamic_cast<I8259 *>(output->getDevice());
- if (master)
- master->setSlave(this);
- I82094AA * ioApic;
- ioApic = dynamic_cast<I82094AA *>(output->getDevice());
- if (ioApic)
- ioApic->setExtIntPic(this);
+ for (int i = 0; i < p->port_output_connection_count; i++) {
+ output.push_back(new IntSourcePin<I8259>(
+ csprintf("%s.output[%d]", name(), i), i, this));
}
- pioSize = 2;
+
+ int in_count = p->port_inputs_connection_count;
+ panic_if(in_count >= NumLines,
+ "I8259 only supports 8 inputs, but there are %d.", in_count);
+ for (int i = 0; i < in_count; i++) {
+ inputs.push_back(new IntSinkPin<I8259>(
+ csprintf("%s.inputs[%d]", name(), i), i, this));
+ }
+
+ for (bool &state: pinStates)
+ state = false;
+}
+
+void
+X86ISA::I8259::init()
+{
+ BasicPioDevice::init();
+
+ for (auto *input: inputs)
+ pinStates[input->getId()] = input->state();
}
Tick
case 0x0:
if (readIRR) {
DPRINTF(I8259, "Reading IRR as %#x.\n", IRR);
- pkt->set(IRR);
+ pkt->setLE(IRR);
} else {
DPRINTF(I8259, "Reading ISR as %#x.\n", ISR);
- pkt->set(ISR);
+ pkt->setLE(ISR);
}
break;
case 0x1:
DPRINTF(I8259, "Reading IMR as %#x.\n", IMR);
- pkt->set(IMR);
+ pkt->setLE(IMR);
break;
}
+ pkt->makeAtomicResponse();
return latency;
}
X86ISA::I8259::write(PacketPtr pkt)
{
assert(pkt->getSize() == 1);
- uint8_t val = pkt->get<uint8_t>();
+ uint8_t val = pkt->getLE<uint8_t>();
switch (pkt->getAddr() - pioAddr) {
case 0x0:
if (bits(val, 4)) {
case 0x2:
DPRINTF(I8259, "Received initialization command word 3.\n");
if (mode == Enums::I8259Master) {
- DPRINTF(I8259, "Slaves attached to IRQs:%s%s%s%s%s%s%s%s\n",
+ DPRINTF(I8259, "Responders attached to "
+ "IRQs:%s%s%s%s%s%s%s%s\n",
bits(val, 0) ? " 0" : "",
bits(val, 1) ? " 1" : "",
bits(val, 2) ? " 2" : "",
bits(val, 7) ? " 7" : "");
cascadeBits = val;
} else {
- DPRINTF(I8259, "Slave ID is %d.\n", val & mask(3));
+ DPRINTF(I8259, "Responder ID is %d.\n", val & mask(3));
cascadeBits = val & mask(3);
}
if (expectICW4)
}
break;
}
+ pkt->makeAtomicResponse();
return latency;
}
X86ISA::I8259::requestInterrupt(int line)
{
if (bits(ISR, 7, line) == 0) {
- if (output) {
+ if (!output.empty()) {
DPRINTF(I8259, "Propogating interrupt.\n");
- output->signalInterrupt();
+ for (auto *wire: output) {
+ wire->raise();
+ //XXX This is a hack.
+ wire->lower();
+ }
} else {
warn("Received interrupt but didn't have "
"anyone to tell about it.\n");
void
X86ISA::I8259::signalInterrupt(int line)
{
- DPRINTF(I8259, "Interrupt raised on line %d.\n", line);
+ DPRINTF(I8259, "Interrupt requested for line %d.\n", line);
if (line >= NumLines)
fatal("Line number %d doesn't exist. The max is %d.\n",
line, NumLines - 1);
}
}
+void
+X86ISA::I8259::raiseInterruptPin(int number)
+{
+ DPRINTF(I8259, "Interrupt signal raised for pin %d.\n", number);
+ if (number >= NumLines)
+ fatal("Line number %d doesn't exist. The max is %d.\n",
+ number, NumLines - 1);
+ if (!pinStates[number])
+ signalInterrupt(number);
+ pinStates[number] = true;
+}
+
+void
+X86ISA::I8259::lowerInterruptPin(int number)
+{
+ DPRINTF(I8259, "Interrupt signal lowered for pin %d.\n", number);
+ if (number >= NumLines)
+ fatal("Line number %d doesn't exist. The max is %d.\n",
+ number, NumLines - 1);
+ pinStates[number] = false;
+}
+
int
X86ISA::I8259::getVector()
{
/*
- * This code only handles one slave. Since that's how the PC platform
+ * This code only handles one responder. Since that's how the PC platform
* always uses the 8259 PIC, there shouldn't be any need for more. If
- * there -is- a need for more for some reason, "slave" can become a
- * vector of slaves.
+ * there -is- a need for more for some reason, "responder" can become a
+ * vector of responders.
*/
int line = findMsbSet(IRR);
IRR &= ~(1 << line);
ISR |= 1 << line;
}
if (slave && bits(cascadeBits, line)) {
- DPRINTF(I8259, "Interrupt was from slave who will "
+ DPRINTF(I8259, "Interrupt was from responder who will "
"provide the vector.\n");
return slave->getVector();
}
return line | vectorOffset;
}
+void
+X86ISA::I8259::serialize(CheckpointOut &cp) const
+{
+ SERIALIZE_ARRAY(pinStates, NumLines);
+ SERIALIZE_ENUM(mode);
+ SERIALIZE_SCALAR(IRR);
+ SERIALIZE_SCALAR(ISR);
+ SERIALIZE_SCALAR(IMR);
+ SERIALIZE_SCALAR(vectorOffset);
+ SERIALIZE_SCALAR(cascadeMode);
+ SERIALIZE_SCALAR(cascadeBits);
+ SERIALIZE_SCALAR(edgeTriggered);
+ SERIALIZE_SCALAR(readIRR);
+ SERIALIZE_SCALAR(expectICW4);
+ SERIALIZE_SCALAR(initControlWord);
+ SERIALIZE_SCALAR(autoEOI);
+}
+
+void
+X86ISA::I8259::unserialize(CheckpointIn &cp)
+{
+ UNSERIALIZE_ARRAY(pinStates, NumLines);
+ UNSERIALIZE_ENUM(mode);
+ UNSERIALIZE_SCALAR(IRR);
+ UNSERIALIZE_SCALAR(ISR);
+ UNSERIALIZE_SCALAR(IMR);
+ UNSERIALIZE_SCALAR(vectorOffset);
+ UNSERIALIZE_SCALAR(cascadeMode);
+ UNSERIALIZE_SCALAR(cascadeBits);
+ UNSERIALIZE_SCALAR(edgeTriggered);
+ UNSERIALIZE_SCALAR(readIRR);
+ UNSERIALIZE_SCALAR(expectICW4);
+ UNSERIALIZE_SCALAR(initControlWord);
+ UNSERIALIZE_SCALAR(autoEOI);
+}
+
X86ISA::I8259 *
I8259Params::create()
{
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