1 /*!
2 * \file trc_pkt_decode_base.h
3 * \brief OpenCSD : Trace Packet decoder base class.
4 *
5 * \copyright Copyright (c) 2015, ARM Limited. All Rights Reserved.
6 */
7
8 /*
9 * Redistribution and use in source and binary forms, with or without modification,
10 * are permitted provided that the following conditions are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright notice,
16 * this list of conditions and the following disclaimer in the documentation
17 * and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the copyright holder nor the names of its contributors
20 * may be used to endorse or promote products derived from this software without
21 * specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
25 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
30 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
32 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #ifndef ARM_TRC_PKT_DECODE_BASE_H_INCLUDED
36 #define ARM_TRC_PKT_DECODE_BASE_H_INCLUDED
37
38 #include "trc_component.h"
39 #include "comp_attach_pt_t.h"
40
41 #include "interfaces/trc_pkt_in_i.h"
42 #include "interfaces/trc_gen_elem_in_i.h"
43 #include "interfaces/trc_tgt_mem_access_i.h"
44 #include "interfaces/trc_instr_decode_i.h"
45
46 /** @defgroup ocsd_pkt_decode OpenCSD Library : Packet Decoders.
47
48 @brief Classes providing Protocol Packet Decoding capability.
49
50 Packet decoders convert incoming protocol packets from a packet processor,
51 into generic trace elements to be output to an analysis program.
52
53 Packet decoders can be:-
54 - PE decoders - converting ETM or PTM packets into instruction and data trace elements
55 - SW stimulus decoder - converting STM or ITM packets into software generated trace elements.
56 - Bus decoders - converting HTM packets into bus transaction elements.
57
58 @{*/
59
60
61 class TrcPktDecodeI : public TraceComponent
62 {
63 public:
64 TrcPktDecodeI(const char *component_name);
65 TrcPktDecodeI(const char *component_name, int instIDNum);
~TrcPktDecodeI()66 virtual ~TrcPktDecodeI() {};
67
getTraceElemOutAttachPt()68 componentAttachPt<ITrcGenElemIn> *getTraceElemOutAttachPt() { return &m_trace_elem_out; };
getMemoryAccessAttachPt()69 componentAttachPt<ITargetMemAccess> *getMemoryAccessAttachPt() { return &m_mem_access; };
getInstrDecodeAttachPt()70 componentAttachPt<IInstrDecode> *getInstrDecodeAttachPt() { return &m_instr_decode; };
71
setUsesMemAccess(bool bUsesMemaccess)72 void setUsesMemAccess(bool bUsesMemaccess) { m_uses_memaccess = bUsesMemaccess; };
getUsesMemAccess()73 const bool getUsesMemAccess() const { return m_uses_memaccess; };
74
setUsesIDecode(bool bUsesIDecode)75 void setUsesIDecode(bool bUsesIDecode) { m_uses_idecode = bUsesIDecode; };
getUsesIDecode()76 const bool getUsesIDecode() const { return m_uses_idecode; };
77
78 protected:
79
80 /* implementation packet decoding interface */
81 virtual ocsd_datapath_resp_t processPacket() = 0;
82 virtual ocsd_datapath_resp_t onEOT() = 0;
83 virtual ocsd_datapath_resp_t onReset() = 0;
84 virtual ocsd_datapath_resp_t onFlush() = 0;
85 virtual ocsd_err_t onProtocolConfig() = 0;
86 virtual const uint8_t getCoreSightTraceID() = 0;
87
88 /* init handling */
89 const bool checkInit();
90 /* Called on first init confirmation */
onFirstInitOK()91 virtual void onFirstInitOK() {};
92
93 /* data output */
94 ocsd_datapath_resp_t outputTraceElement(const OcsdTraceElement &elem); // use current index
95 ocsd_datapath_resp_t outputTraceElementIdx(ocsd_trc_index_t idx, const OcsdTraceElement &elem); // use supplied index (where decoder caches elements)
96
97 /* target access */
98 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);
99
100 /* instruction decode */
101 ocsd_err_t instrDecode(ocsd_instr_info *instr_info);
102
103 componentAttachPt<ITrcGenElemIn> m_trace_elem_out;
104 componentAttachPt<ITargetMemAccess> m_mem_access;
105 componentAttachPt<IInstrDecode> m_instr_decode;
106
107 ocsd_trc_index_t m_index_curr_pkt;
108
109 bool m_decode_init_ok; //!< set true if all attachments in place for decode. (remove checks in main throughput paths)
110 bool m_config_init_ok; //!< set true if config set.
111
112 std::string init_err_msg; //!< error message for init error
113
114 bool m_uses_memaccess;
115 bool m_uses_idecode;
116
117 };
118
TrcPktDecodeI(const char * component_name)119 inline TrcPktDecodeI::TrcPktDecodeI(const char *component_name) :
120 TraceComponent(component_name),
121 m_index_curr_pkt(0),
122 m_decode_init_ok(false),
123 m_config_init_ok(false),
124 m_uses_memaccess(true),
125 m_uses_idecode(true)
126 {
127 }
128
TrcPktDecodeI(const char * component_name,int instIDNum)129 inline TrcPktDecodeI::TrcPktDecodeI(const char *component_name, int instIDNum) :
130 TraceComponent(component_name, instIDNum),
131 m_index_curr_pkt(0),
132 m_decode_init_ok(false),
133 m_config_init_ok(false),
134 m_uses_memaccess(true),
135 m_uses_idecode(true)
136 {
137 }
138
checkInit()139 inline const bool TrcPktDecodeI::checkInit()
140 {
141 if(!m_decode_init_ok)
142 {
143 if(!m_config_init_ok)
144 init_err_msg = "No decoder configuration information";
145 else if(!m_trace_elem_out.hasAttachedAndEnabled())
146 init_err_msg = "No element output interface attached and enabled";
147 else if(m_uses_memaccess && !m_mem_access.hasAttachedAndEnabled())
148 init_err_msg = "No memory access interface attached and enabled";
149 else if(m_uses_idecode && !m_instr_decode.hasAttachedAndEnabled())
150 init_err_msg = "No instruction decoder interface attached and enabled";
151 else
152 m_decode_init_ok = true;
153 if (m_decode_init_ok)
154 onFirstInitOK();
155 }
156 return m_decode_init_ok;
157 }
158
outputTraceElement(const OcsdTraceElement & elem)159 inline ocsd_datapath_resp_t TrcPktDecodeI::outputTraceElement(const OcsdTraceElement &elem)
160 {
161 return m_trace_elem_out.first()->TraceElemIn(m_index_curr_pkt,getCoreSightTraceID(), elem);
162 }
163
outputTraceElementIdx(ocsd_trc_index_t idx,const OcsdTraceElement & elem)164 inline ocsd_datapath_resp_t TrcPktDecodeI::outputTraceElementIdx(ocsd_trc_index_t idx, const OcsdTraceElement &elem)
165 {
166 return m_trace_elem_out.first()->TraceElemIn(idx, getCoreSightTraceID(), elem);
167 }
168
instrDecode(ocsd_instr_info * instr_info)169 inline ocsd_err_t TrcPktDecodeI::instrDecode(ocsd_instr_info *instr_info)
170 {
171 if(m_uses_idecode)
172 return m_instr_decode.first()->DecodeInstruction(instr_info);
173 return OCSD_ERR_DCD_INTERFACE_UNUSED;
174 }
175
accessMemory(const ocsd_vaddr_t address,const ocsd_mem_space_acc_t mem_space,uint32_t * num_bytes,uint8_t * p_buffer)176 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)
177 {
178 if(m_uses_memaccess)
179 return m_mem_access.first()->ReadTargetMemory(address,getCoreSightTraceID(),mem_space, num_bytes,p_buffer);
180 return OCSD_ERR_DCD_INTERFACE_UNUSED;
181 }
182
183 /**********************************************************************/
184 template <class P, class Pc>
185 class TrcPktDecodeBase : public TrcPktDecodeI, public IPktDataIn<P>
186 {
187 public:
188 TrcPktDecodeBase(const char *component_name);
189 TrcPktDecodeBase(const char *component_name, int instIDNum);
190 virtual ~TrcPktDecodeBase();
191
192 virtual ocsd_datapath_resp_t PacketDataIn( const ocsd_datapath_op_t op,
193 const ocsd_trc_index_t index_sop,
194 const P *p_packet_in);
195
196
197 /* protocol configuration */
198 ocsd_err_t setProtocolConfig(const Pc *config);
getProtocolConfig()199 const Pc * getProtocolConfig() const { return m_config; };
200
201 protected:
202 void ClearConfigObj();
203
204 /* the protocol configuration */
205 Pc * m_config;
206 /* the current input packet */
207 const P * m_curr_packet_in;
208
209 };
210
211
TrcPktDecodeBase(const char * component_name)212 template <class P, class Pc> TrcPktDecodeBase<P, Pc>::TrcPktDecodeBase(const char *component_name) :
213 TrcPktDecodeI(component_name),
214 m_config(0)
215 {
216 }
217
TrcPktDecodeBase(const char * component_name,int instIDNum)218 template <class P, class Pc> TrcPktDecodeBase<P, Pc>::TrcPktDecodeBase(const char *component_name, int instIDNum) :
219 TrcPktDecodeI(component_name,instIDNum),
220 m_config(0)
221 {
222 }
223
~TrcPktDecodeBase()224 template <class P, class Pc> TrcPktDecodeBase<P, Pc>::~TrcPktDecodeBase()
225 {
226 ClearConfigObj();
227 }
228
PacketDataIn(const ocsd_datapath_op_t op,const ocsd_trc_index_t index_sop,const P * p_packet_in)229 template <class P, class Pc> ocsd_datapath_resp_t TrcPktDecodeBase<P, Pc>::PacketDataIn( const ocsd_datapath_op_t op,
230 const ocsd_trc_index_t index_sop,
231 const P *p_packet_in)
232 {
233 ocsd_datapath_resp_t resp = OCSD_RESP_CONT;
234 if(!checkInit())
235 {
236 LogError(ocsdError(OCSD_ERR_SEV_ERROR,OCSD_ERR_NOT_INIT,init_err_msg));
237 return OCSD_RESP_FATAL_NOT_INIT;
238 }
239
240 switch(op)
241 {
242 case OCSD_OP_DATA:
243 if(p_packet_in == 0)
244 {
245 LogError(ocsdError(OCSD_ERR_SEV_ERROR,OCSD_ERR_INVALID_PARAM_VAL));
246 resp = OCSD_RESP_FATAL_INVALID_PARAM;
247 }
248 else
249 {
250 m_curr_packet_in = p_packet_in;
251 m_index_curr_pkt = index_sop;
252 resp = processPacket();
253 }
254 break;
255
256 case OCSD_OP_EOT:
257 resp = onEOT();
258 break;
259
260 case OCSD_OP_FLUSH:
261 resp = onFlush();
262 break;
263
264 case OCSD_OP_RESET:
265 resp = onReset();
266 break;
267
268 default:
269 LogError(ocsdError(OCSD_ERR_SEV_ERROR,OCSD_ERR_INVALID_PARAM_VAL));
270 resp = OCSD_RESP_FATAL_INVALID_OP;
271 break;
272 }
273 return resp;
274 }
275
276 /* protocol configuration */
setProtocolConfig(const Pc * config)277 template <class P, class Pc> ocsd_err_t TrcPktDecodeBase<P, Pc>::setProtocolConfig(const Pc *config)
278 {
279 ocsd_err_t err = OCSD_ERR_INVALID_PARAM_VAL;
280 if(config != 0)
281 {
282 ClearConfigObj(); // remove any current config
283 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.
284 if(m_config != 0)
285 {
286 err = onProtocolConfig();
287 if(err == OCSD_OK)
288 m_config_init_ok = true;
289 }
290 else
291 err = OCSD_ERR_MEM;
292 }
293 return err;
294 }
295
ClearConfigObj()296 template <class P, class Pc> void TrcPktDecodeBase<P, Pc>::ClearConfigObj()
297 {
298 if(m_config)
299 {
300 delete m_config;
301 m_config = 0;
302 }
303 }
304
305 /** @}*/
306 #endif // ARM_TRC_PKT_DECODE_BASE_H_INCLUDED
307
308 /* End of File trc_pkt_decode_base.h */
309