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/*
* Copyright (c) 2004 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.
*/
/** @file
* Emulation of the Tsunami CChip CSRs
*/
#ifndef __TSUNAMI_CCHIP_HH__
#define __TSUNAMI_CCHIP_HH__
#include "dev/tsunami.hh"
#include "base/range.hh"
#include "dev/io_device.hh"
/**
* Tsunami CChip CSR Emulation. This device includes all the interrupt
* handling code for the chipset.
*/
class TsunamiCChip : public PioDevice
{
private:
/** The base address of this device */
Addr addr;
/** The size of mappad from the above address */
static const Addr size = 0xfffffff;
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];
/**
* This register contains bits for each PCI interrupt
* that can occur.
*/
uint64_t drir;
/** Indicator of which CPUs have an IPI interrupt */
uint64_t ipint;
/** Indicator of which CPUs have an RTC interrupt */
uint64_t itint;
public:
/**
* 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);
/**
* 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);
/**
* post an ipi interrupt to the CPU.
* @param ipintr the cpu number to clear(bitvector)
*/
void clearIPI(uint64_t ipintr);
/**
* clear a timer interrupt previously posted to the CPU.
* @param interrupt the cpu number to clear(bitvector)
*/
void clearITI(uint64_t itintr);
/**
* request an interrupt be posted to the CPU.
* @param ipreq the cpu number to interrupt(bitvector)
*/
void reqIPI(uint64_t ipreq);
/**
* 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__
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