aboutsummaryrefslogtreecommitdiffstats
path: root/decoder/include/common/trc_pkt_decode_base.h
blob: da702068f372897cdbfcc93f5b1c9bdd9867de6b (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
/*!
 * \file       trc_pkt_decode_base.h
 * \brief      OpenCSD : Trace Packet decoder base class.
 * 
 * \copyright  Copyright (c) 2015, ARM Limited. All Rights Reserved.
 */

/* 
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, 
 * this list of conditions and the following disclaimer.
 * 
 * 2. 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. 
 * 
 * 3. Neither the name of the copyright holder 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 HOLDER 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 ARM_TRC_PKT_DECODE_BASE_H_INCLUDED
#define ARM_TRC_PKT_DECODE_BASE_H_INCLUDED

#include "trc_component.h"
#include "comp_attach_pt_t.h"

#include "interfaces/trc_pkt_in_i.h"
#include "interfaces/trc_gen_elem_in_i.h"
#include "interfaces/trc_tgt_mem_access_i.h"
#include "interfaces/trc_instr_decode_i.h"

/** @defgroup ocsd_pkt_decode OpenCSD Library : Packet Decoders.

    @brief Classes providing Protocol Packet Decoding capability.

    Packet decoders convert incoming protocol packets from a packet processor,
    into generic trace elements to be output to an analysis program.

    Packet decoders can be:-
    - PE decoders - converting ETM or PTM packets into instruction and data trace elements
    - SW stimulus decoder - converting STM or ITM packets into software generated trace elements.
    - Bus decoders - converting HTM packets into bus transaction elements.

@{*/


class TrcPktDecodeI : public TraceComponent
{
public:
    TrcPktDecodeI(const char *component_name);
    TrcPktDecodeI(const char *component_name, int instIDNum);
    virtual ~TrcPktDecodeI() {};

    componentAttachPt<ITrcGenElemIn> *getTraceElemOutAttachPt() { return &m_trace_elem_out; };
    componentAttachPt<ITargetMemAccess> *getMemoryAccessAttachPt() { return &m_mem_access; };
    componentAttachPt<IInstrDecode> *getInstrDecodeAttachPt() { return &m_instr_decode; };

    void setUsesMemAccess(bool bUsesMemaccess) { m_uses_memaccess = bUsesMemaccess; };
    const bool getUsesMemAccess() const { return m_uses_memaccess; };

    void setUsesIDecode(bool bUsesIDecode) { m_uses_idecode = bUsesIDecode; };
    const bool getUsesIDecode() const { return m_uses_idecode; };

protected:

    /* implementation packet decoding interface */
    virtual ocsd_datapath_resp_t processPacket() = 0;
    virtual ocsd_datapath_resp_t onEOT() = 0;
    virtual ocsd_datapath_resp_t onReset() = 0;
    virtual ocsd_datapath_resp_t onFlush() = 0;
    virtual ocsd_err_t onProtocolConfig() = 0;
    virtual const uint8_t getCoreSightTraceID() = 0;

    /* init handling */
    const bool checkInit();
    /* Called on first init confirmation */
    virtual void onFirstInitOK() {};

    /* data output */
    ocsd_datapath_resp_t outputTraceElement(const OcsdTraceElement &elem);    // use current index
    ocsd_datapath_resp_t outputTraceElementIdx(ocsd_trc_index_t idx, const OcsdTraceElement &elem); // use supplied index (where decoder caches elements) 

    /* target access */
    ocsd_err_t accessMemory(const ocsd_vaddr_t address, const ocsd_mem_space_acc_t mem_space, uint32_t *num_bytes, uint8_t *p_buffer);

    /* instruction decode */
    ocsd_err_t instrDecode(ocsd_instr_info *instr_info);

    componentAttachPt<ITrcGenElemIn> m_trace_elem_out;
    componentAttachPt<ITargetMemAccess> m_mem_access;
    componentAttachPt<IInstrDecode> m_instr_decode;

    ocsd_trc_index_t   m_index_curr_pkt;

    bool m_decode_init_ok;  //!< set true if all attachments in place for decode. (remove checks in main throughput paths)
    bool m_config_init_ok;  //!< set true if config set.

    std::string init_err_msg;    //!< error message for init error

    bool m_uses_memaccess;
    bool m_uses_idecode;

};

inline TrcPktDecodeI::TrcPktDecodeI(const char *component_name) : 
    TraceComponent(component_name),
    m_index_curr_pkt(0),
    m_decode_init_ok(false),
    m_config_init_ok(false),
    m_uses_memaccess(true),
    m_uses_idecode(true)
{
}

inline TrcPktDecodeI::TrcPktDecodeI(const char *component_name, int instIDNum) :
    TraceComponent(component_name, instIDNum),
    m_index_curr_pkt(0),
    m_decode_init_ok(false),
    m_config_init_ok(false),
    m_uses_memaccess(true),
    m_uses_idecode(true)
{
}

inline const bool TrcPktDecodeI::checkInit()
{
    if(!m_decode_init_ok)
    {
        if(!m_config_init_ok)
            init_err_msg = "No decoder configuration information";
        else if(!m_trace_elem_out.hasAttachedAndEnabled())
            init_err_msg = "No element output interface attached and enabled";
        else if(m_uses_memaccess && !m_mem_access.hasAttachedAndEnabled())
            init_err_msg = "No memory access interface attached and enabled";
        else if(m_uses_idecode && !m_instr_decode.hasAttachedAndEnabled())
            init_err_msg = "No instruction decoder interface attached and enabled";
        else
            m_decode_init_ok = true;
        if (m_decode_init_ok)
            onFirstInitOK();
    }
    return m_decode_init_ok;
}

inline ocsd_datapath_resp_t TrcPktDecodeI::outputTraceElement(const OcsdTraceElement &elem)
{
    return m_trace_elem_out.first()->TraceElemIn(m_index_curr_pkt,getCoreSightTraceID(), elem);
}

inline ocsd_datapath_resp_t TrcPktDecodeI::outputTraceElementIdx(ocsd_trc_index_t idx, const OcsdTraceElement &elem)
{
    return m_trace_elem_out.first()->TraceElemIn(idx, getCoreSightTraceID(), elem);
}

inline ocsd_err_t TrcPktDecodeI::instrDecode(ocsd_instr_info *instr_info)
{
    if(m_uses_idecode)
        return m_instr_decode.first()->DecodeInstruction(instr_info);
    return OCSD_ERR_DCD_INTERFACE_UNUSED;
}

inline ocsd_err_t TrcPktDecodeI::accessMemory(const ocsd_vaddr_t address, const ocsd_mem_space_acc_t mem_space, uint32_t *num_bytes, uint8_t *p_buffer)
{
    if(m_uses_memaccess)
        return m_mem_access.first()->ReadTargetMemory(address,getCoreSightTraceID(),mem_space, num_bytes,p_buffer);
    return OCSD_ERR_DCD_INTERFACE_UNUSED;
}

/**********************************************************************/
template <class P, class Pc>
class TrcPktDecodeBase : public TrcPktDecodeI, public IPktDataIn<P>
{
public:
    TrcPktDecodeBase(const char *component_name);
    TrcPktDecodeBase(const char *component_name, int instIDNum);
    virtual ~TrcPktDecodeBase();

    virtual ocsd_datapath_resp_t PacketDataIn( const ocsd_datapath_op_t op,
                                                const ocsd_trc_index_t index_sop,
                                                const P *p_packet_in);
    

    /* protocol configuration */
    ocsd_err_t setProtocolConfig(const Pc *config); 
    const Pc *  getProtocolConfig() const { return  m_config; };
    
protected:
    void ClearConfigObj();

    /* the protocol configuration */
    Pc *          m_config;
    /* the current input packet */
    const P *     m_curr_packet_in;
    
};


template <class P, class Pc> TrcPktDecodeBase<P, Pc>::TrcPktDecodeBase(const char *component_name) : 
    TrcPktDecodeI(component_name),
    m_config(0)
{
}

template <class P, class Pc> TrcPktDecodeBase<P, Pc>::TrcPktDecodeBase(const char *component_name, int instIDNum) : 
    TrcPktDecodeI(component_name,instIDNum),
    m_config(0)
{
}

template <class P, class Pc> TrcPktDecodeBase<P, Pc>::~TrcPktDecodeBase() 
{
    ClearConfigObj();
}

template <class P, class Pc> ocsd_datapath_resp_t TrcPktDecodeBase<P, Pc>::PacketDataIn( const ocsd_datapath_op_t op,
                                                const ocsd_trc_index_t index_sop,
                                                const P *p_packet_in)
{
    ocsd_datapath_resp_t resp = OCSD_RESP_CONT;
    if(!checkInit())
    {
        LogError(ocsdError(OCSD_ERR_SEV_ERROR,OCSD_ERR_NOT_INIT,init_err_msg));
        return OCSD_RESP_FATAL_NOT_INIT;
    }

    switch(op)
    {
    case OCSD_OP_DATA:
        if(p_packet_in == 0)
        {
            LogError(ocsdError(OCSD_ERR_SEV_ERROR,OCSD_ERR_INVALID_PARAM_VAL));
            resp = OCSD_RESP_FATAL_INVALID_PARAM;
        }
        else
        {
            m_curr_packet_in = p_packet_in;
            m_index_curr_pkt = index_sop;
            resp = processPacket();
        }
        break;

    case OCSD_OP_EOT:
        resp = onEOT();
        break;

    case OCSD_OP_FLUSH:
        resp = onFlush();
        break;

    case OCSD_OP_RESET:
        resp = onReset();
        break;

    default:
        LogError(ocsdError(OCSD_ERR_SEV_ERROR,OCSD_ERR_INVALID_PARAM_VAL));
        resp = OCSD_RESP_FATAL_INVALID_OP;
        break;
    }
    return resp;
}

    /* protocol configuration */
template <class P, class Pc>  ocsd_err_t TrcPktDecodeBase<P, Pc>::setProtocolConfig(const Pc *config)
{
    ocsd_err_t err = OCSD_ERR_INVALID_PARAM_VAL;
    if(config != 0)
    {
        ClearConfigObj(); // remove any current config
        m_config = new (std::nothrow) Pc(*config); // make a copy of the config - don't rely on the object passed in being valid outside the context of the call.
        if(m_config != 0)
        {
            err = onProtocolConfig();
            if(err == OCSD_OK)
                m_config_init_ok = true;
        }
        else
            err = OCSD_ERR_MEM;
    }
    return err;
}

template <class P, class Pc> void TrcPktDecodeBase<P, Pc>::ClearConfigObj()
{
    if(m_config)
    {
        delete m_config;
        m_config = 0;
    }
}

/** @}*/
#endif // ARM_TRC_PKT_DECODE_BASE_H_INCLUDED

/* End of File trc_pkt_decode_base.h */