/*
- * Copyright (c) 2003 The Regents of The University of Michigan
+ * Copyright (c) 2004 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
*/
/* @file
- * Turbolaser system bus node (processor, memory, or IO)
+ * Emulation of the Tsunami CChip CSRs
*/
#ifndef __TSUNAMI_CCHIP_HH__
#define __TSUNAMI_CCHIP_HH__
-#include "mem/functional_mem/mmap_device.hh"
#include "dev/tsunami.hh"
+#include "base/range.hh"
+#include "dev/io_device.hh"
/*
* Tsunami CChip
*/
-class TsunamiCChip : public MmapDevice
+class TsunamiCChip : public PioDevice
{
- public:
+ private:
+ /** The base address of this device */
+ Addr addr;
+
+ /** The size of mappad from the above address */
+ static const Addr size = 0xfff;
protected:
+ /**
+ * pointer to the tsunami object.
+ * This is our access to all the other tsunami
+ * devices.
+ */
Tsunami *tsunami;
+
+ /**
+ * The dims are device interrupt mask registers.
+ * One exists for each CPU, the DRIR X DIM = DIR
+ */
uint64_t dim[Tsunami::Max_CPUs];
+
+ /**
+ * The dirs are device interrupt registers.
+ * One exists for each CPU, the DRIR X DIM = DIR
+ */
uint64_t dir[Tsunami::Max_CPUs];
+ bool dirInterrupting[Tsunami::Max_CPUs];
+
+ /**
+ * This register contains bits for each PCI interrupt
+ * that can occur.
+ */
uint64_t drir;
+ /**
+ * The MISC register contains the CPU we are currently on
+ * as well as bits to ack RTC and IPI interrupts.
+ */
+ uint64_t misc;
+
+ /** Count of the number of pending IPIs on a CPU */
+ uint64_t ipiInterrupting[Tsunami::Max_CPUs];
+
+ /** Indicator of which CPUs have had an RTC interrupt */
+ bool RTCInterrupting[Tsunami::Max_CPUs];
+
public:
- TsunamiCChip(const std::string &name, /*Tsunami *t,*/
- Addr addr, Addr mask, MemoryController *mmu);
+ /**
+ * Initialize the Tsunami CChip by setting all of the
+ * device register to 0.
+ * @param name name of this device.
+ * @param t pointer back to the Tsunami object that we belong to.
+ * @param a address we are mapped at.
+ * @param mmu pointer to the memory controller that sends us events.
+ * @param hier object to store parameters universal the device hierarchy
+ * @param bus The bus that this device is attached to
+ */
+ TsunamiCChip(const std::string &name, Tsunami *t, Addr a,
+ MemoryController *mmu, HierParams *hier, Bus *bus,
+ Tick pio_latency);
- virtual Fault read(MemReqPtr req, uint8_t *data);
- virtual Fault write(MemReqPtr req, const uint8_t *data);
+ /**
+ * Process a read to the CChip.
+ * @param req Contains the address to read from.
+ * @param data A pointer to write the read data to.
+ * @return The fault condition of the access.
+ */
+ virtual Fault read(MemReqPtr &req, uint8_t *data);
+
+ /**
+ * Process a write to the CChip.
+ * @param req Contains the address to write to.
+ * @param data The data to write.
+ * @return The fault condition of the access.
+ */
+ virtual Fault write(MemReqPtr &req, const uint8_t *data);
+
+ /**
+ * post an RTC interrupt to the CPU
+ */
+ void postRTC();
+
+ /**
+ * post an interrupt to the CPU.
+ * @param interrupt the interrupt number to post (0-64)
+ */
+ void postDRIR(uint32_t interrupt);
+
+ /**
+ * clear an interrupt previously posted to the CPU.
+ * @param interrupt the interrupt number to post (0-64)
+ */
+ void clearDRIR(uint32_t interrupt);
+
+ /**
+ * Serialize this object to the given output stream.
+ * @param os The stream to serialize to.
+ */
virtual void serialize(std::ostream &os);
+
+ /**
+ * Reconstruct the state of this object from a checkpoint.
+ * @param cp The checkpoint use.
+ * @param section The section name of this object
+ */
virtual void unserialize(Checkpoint *cp, const std::string §ion);
+
+ /**
+ * Return how long this access will take.
+ * @param req the memory request to calcuate
+ * @return Tick when the request is done
+ */
+ Tick cacheAccess(MemReqPtr &req);
};
#endif // __TSUNAMI_CCHIP_HH__