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/*
* Copyright (c) 2009 Advanced Micro Devices, Inc.
* 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.
*/
#ifndef RUBYPORT_H
#define RUBYPORT_H
#include "mem/ruby/libruby.hh"
#include <string>
#include <assert.h>
#include "mem/mem_object.hh"
#include "mem/tport.hh"
#include "params/RubyPort.hh"
using namespace std;
class MessageBuffer;
class AbstractController;
class RubyPort : public MemObject {
public:
typedef RubyPortParams Params;
RubyPort(const Params *p);
virtual ~RubyPort() {}
Port *getPort(const std::string &if_name, int idx);
virtual int64_t makeRequest(const RubyRequest & request) = 0;
void registerHitCallback(void (*hit_callback)(int64_t request_id)) {
assert(m_hit_callback == NULL); // can't assign hit_callback twice
m_hit_callback = hit_callback;
}
protected:
const string m_name;
void (*m_hit_callback)(int64_t);
int64_t makeUniqueRequestID() {
// The request ID is generated by combining the port ID with a request count
// so that request IDs can be formed concurrently by multiple threads.
// IDs are formed as follows:
//
//
// 0 PortID Request Count
// +----+---------------+-----------------------------------------------------+
// | 63 | 62-48 | 47-0 |
// +----+---------------+-----------------------------------------------------+
//
//
// This limits the system to a maximum of 2^11 == 2048 components
// and 2^48 ~= 3x10^14 requests per component
int64_t id = (static_cast<uint64_t>(m_port_id) << 48) | m_request_cnt;
m_request_cnt++;
// assert((m_request_cnt & (1<<48)) == 0);
return id;
}
int m_version;
AbstractController* m_controller;
MessageBuffer* m_mandatory_q_ptr;
private:
static uint16_t m_num_ports;
uint16_t m_port_id;
uint64_t m_request_cnt;
};
#endif
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