tsunami_cchip.hh revision 909 
1/*
2 * Copyright (c) 2004 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/* @file
30 * Emulation of the Tsunami CChip CSRs
31 */
32
33#ifndef __TSUNAMI_CCHIP_HH__
34#define __TSUNAMI_CCHIP_HH__
35
36#include "dev/tsunami.hh"
37#include "base/range.hh"
38#include "dev/io_device.hh"
39
40/*
41 * Tsunami CChip
42 */
43class TsunamiCChip : public PioDevice
44{
45  private:
46    /** The base address of this device */
47    Addr addr;
48
49    /** The size of mappad from the above address */
50    static const Addr size = 0xfff;
51
52  protected:
53    /**
54     * pointer to the tsunami object.
55     * This is our access to all the other tsunami
56     * devices.
57     */
58    Tsunami *tsunami;
59
60    /**
61     * The dims are device interrupt mask registers.
62     * One exists for each CPU, the DRIR X DIM = DIR
63     */
64    uint64_t dim[Tsunami::Max_CPUs];
65
66    /**
67     * The dirs are device interrupt registers.
68     * One exists for each CPU, the DRIR X DIM = DIR
69     */
70    uint64_t dir[Tsunami::Max_CPUs];
71    bool dirInterrupting[Tsunami::Max_CPUs];
72
73    /**
74     * This register contains bits for each PCI interrupt
75     * that can occur.
76     */
77    uint64_t drir;
78
79    /**
80     * The MISC register contains the CPU we are currently on
81     * as well as bits to ack RTC and IPI interrupts.
82     */
83    uint64_t misc;
84
85    /** Count of the number of pending IPIs on a CPU */
86    uint64_t ipiInterrupting[Tsunami::Max_CPUs];
87
88    /** Indicator of which CPUs have had an RTC interrupt */
89    bool RTCInterrupting[Tsunami::Max_CPUs];
90
91  public:
92    /**
93     * Initialize the Tsunami CChip by setting all of the
94     * device register to 0.
95     * @param name name of this device.
96     * @param t pointer back to the Tsunami object that we belong to.
97     * @param a address we are mapped at.
98     * @param mmu pointer to the memory controller that sends us events.
99     * @param hier object to store parameters universal the device hierarchy
100     * @param bus The bus that this device is attached to
101     */
102    TsunamiCChip(const std::string &name, Tsunami *t, Addr a,
103                 MemoryController *mmu, HierParams *hier, Bus *bus);
104
105    /**
106      * Process a read to the CChip.
107      * @param req Contains the address to read from.
108      * @param data A pointer to write the read data to.
109      * @return The fault condition of the access.
110      */
111    virtual Fault read(MemReqPtr &req, uint8_t *data);
112
113
114    /**
115      * Process a write to the CChip.
116      * @param req Contains the address to write to.
117      * @param data The data to write.
118      * @return The fault condition of the access.
119      */
120    virtual Fault write(MemReqPtr &req, const uint8_t *data);
121
122    /**
123     * post an RTC interrupt to the CPU
124     */
125    void postRTC();
126
127    /**
128     * post an interrupt to the CPU.
129     * @param interrupt the interrupt number to post (0-64)
130     */
131    void postDRIR(uint32_t interrupt);
132
133    /**
134     * clear an interrupt previously posted to the CPU.
135     * @param interrupt the interrupt number to post (0-64)
136     */
137    void clearDRIR(uint32_t interrupt);
138
139    /**
140     * Serialize this object to the given output stream.
141     * @param os The stream to serialize to.
142     */
143    virtual void serialize(std::ostream &os);
144
145    /**
146     * Reconstruct the state of this object from a checkpoint.
147     * @param cp The checkpoint use.
148     * @param section The section name of this object
149     */
150    virtual void unserialize(Checkpoint *cp, const std::string &section);
151
152    /**
153     * Return how long this access will take.
154     * @param req the memory request to calcuate
155     * @return Tick when the request is done
156     */
157    Tick cacheAccess(MemReqPtr &req);
158};
159
160#endif // __TSUNAMI_CCHIP_HH__
161