1/*
2 * Copyright (c) 2017 The University of Virginia
3 * Copyright 2015 LabWare
4 * Copyright 2014 Google, Inc.
5 * Copyright (c) 2007 The Regents of The University of Michigan
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are
10 * met: redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer;
12 * redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution;
15 * neither the name of the copyright holders nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * Authors: Nathan Binkert
32 *          Boris Shingarov
33 *          Alec Roelke
34 */
35
36#ifndef __ARCH_RISCV_REMOTE_GDB_HH__
37#define __ARCH_RISCV_REMOTE_GDB_HH__
38
39#include <string>
40
41#include "arch/riscv/registers.hh"
42#include "base/remote_gdb.hh"
43
44class System;
45class ThreadContext;
46
47namespace RiscvISA
48{
49
50class RemoteGDB : public BaseRemoteGDB
51{
52  protected:
53    static const int NumGDBRegs = 4162;
54    static const int NumCSRs = 4096;
55
56    bool acc(Addr addr, size_t len);
57    // A breakpoint will be 2 bytes if it is compressed and 4 if not
58    bool checkBpLen(size_t len) override { return len == 2 || len == 4; }
59
60    class RiscvGdbRegCache : public BaseGdbRegCache
61    {
62      using BaseGdbRegCache::BaseGdbRegCache;
63      private:
64        struct {
65            uint64_t gpr[NumIntArchRegs];
66            uint64_t pc;
67        } r;
68      public:
69        char *data() const { return (char *)&r; }
70        size_t size() const { return sizeof(r); }
71        void getRegs(ThreadContext*);
72        void setRegs(ThreadContext*) const;
73
74        const std::string
75        name() const
76        {
77            return gdb->name() + ".RiscvGdbRegCache";
78        }
79    };
80
81    RiscvGdbRegCache regCache;
82
83  public:
84    RemoteGDB(System *_system, ThreadContext *tc, int _port);
85    BaseGdbRegCache *gdbRegs();
86};
87
88} // namespace RiscvISA
89
90#endif /* __ARCH_RISCV_REMOTE_GDB_H__ */
91