2 * \file trc_pkt_decode_base.h
3 * \brief OpenCSD : Trace Packet decoder base class.
5 * \copyright Copyright (c) 2015, ARM Limited. All Rights Reserved.
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10 * are permitted provided that the following conditions are met:
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35 #ifndef ARM_TRC_PKT_DECODE_BASE_H_INCLUDED
36 #define ARM_TRC_PKT_DECODE_BASE_H_INCLUDED
38 #include "trc_component.h"
39 #include "comp_attach_pt_t.h"
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"
46 /** @defgroup ocsd_pkt_decode OpenCSD Library : Packet Decoders.
48 @brief Classes providing Protocol Packet Decoding capability.
50 Packet decoders convert incoming protocol packets from a packet processor,
51 into generic trace elements to be output to an analysis program.
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.
61 class TrcPktDecodeI : public TraceComponent
64 TrcPktDecodeI(const char *component_name);
65 TrcPktDecodeI(const char *component_name, int instIDNum);
66 virtual ~TrcPktDecodeI() {};
68 componentAttachPt<ITrcGenElemIn> *getTraceElemOutAttachPt() { return &m_trace_elem_out; };
69 componentAttachPt<ITargetMemAccess> *getMemoryAccessAttachPt() { return &m_mem_access; };
70 componentAttachPt<IInstrDecode> *getInstrDecodeAttachPt() { return &m_instr_decode; };
72 void setUsesMemAccess(bool bUsesMemaccess) { m_uses_memaccess = bUsesMemaccess; };
73 const bool getUsesMemAccess() const { return m_uses_memaccess; };
75 void setUsesIDecode(bool bUsesIDecode) { m_uses_idecode = bUsesIDecode; };
76 const bool getUsesIDecode() const { return m_uses_idecode; };
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;
89 const bool checkInit();
90 /* Called on first init confirmation */
91 virtual void onFirstInitOK() {};
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)
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);
100 /* instruction decode */
101 ocsd_err_t instrDecode(ocsd_instr_info *instr_info);
103 componentAttachPt<ITrcGenElemIn> m_trace_elem_out;
104 componentAttachPt<ITargetMemAccess> m_mem_access;
105 componentAttachPt<IInstrDecode> m_instr_decode;
107 ocsd_trc_index_t m_index_curr_pkt;
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.
112 std::string init_err_msg; //!< error message for init error
114 bool m_uses_memaccess;
119 inline TrcPktDecodeI::TrcPktDecodeI(const char *component_name) :
120 TraceComponent(component_name),
122 m_decode_init_ok(false),
123 m_config_init_ok(false),
124 m_uses_memaccess(true),
129 inline TrcPktDecodeI::TrcPktDecodeI(const char *component_name, int instIDNum) :
130 TraceComponent(component_name, instIDNum),
132 m_decode_init_ok(false),
133 m_config_init_ok(false),
134 m_uses_memaccess(true),
139 inline const bool TrcPktDecodeI::checkInit()
141 if(!m_decode_init_ok)
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";
152 m_decode_init_ok = true;
153 if (m_decode_init_ok)
156 return m_decode_init_ok;
159 inline ocsd_datapath_resp_t TrcPktDecodeI::outputTraceElement(const OcsdTraceElement &elem)
161 return m_trace_elem_out.first()->TraceElemIn(m_index_curr_pkt,getCoreSightTraceID(), elem);
164 inline ocsd_datapath_resp_t TrcPktDecodeI::outputTraceElementIdx(ocsd_trc_index_t idx, const OcsdTraceElement &elem)
166 return m_trace_elem_out.first()->TraceElemIn(idx, getCoreSightTraceID(), elem);
169 inline ocsd_err_t TrcPktDecodeI::instrDecode(ocsd_instr_info *instr_info)
172 return m_instr_decode.first()->DecodeInstruction(instr_info);
173 return OCSD_ERR_DCD_INTERFACE_UNUSED;
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)
179 return m_mem_access.first()->ReadTargetMemory(address,getCoreSightTraceID(),mem_space, num_bytes,p_buffer);
180 return OCSD_ERR_DCD_INTERFACE_UNUSED;
183 /**********************************************************************/
184 template <class P, class Pc>
185 class TrcPktDecodeBase : public TrcPktDecodeI, public IPktDataIn<P>
188 TrcPktDecodeBase(const char *component_name);
189 TrcPktDecodeBase(const char *component_name, int instIDNum);
190 virtual ~TrcPktDecodeBase();
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);
197 /* protocol configuration */
198 ocsd_err_t setProtocolConfig(const Pc *config);
199 const Pc * getProtocolConfig() const { return m_config; };
202 void ClearConfigObj();
204 /* the protocol configuration */
206 /* the current input packet */
207 const P * m_curr_packet_in;
212 template <class P, class Pc> TrcPktDecodeBase<P, Pc>::TrcPktDecodeBase(const char *component_name) :
213 TrcPktDecodeI(component_name),
218 template <class P, class Pc> TrcPktDecodeBase<P, Pc>::TrcPktDecodeBase(const char *component_name, int instIDNum) :
219 TrcPktDecodeI(component_name,instIDNum),
224 template <class P, class Pc> TrcPktDecodeBase<P, Pc>::~TrcPktDecodeBase()
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)
233 ocsd_datapath_resp_t resp = OCSD_RESP_CONT;
236 LogError(ocsdError(OCSD_ERR_SEV_ERROR,OCSD_ERR_NOT_INIT,init_err_msg));
237 return OCSD_RESP_FATAL_NOT_INIT;
245 LogError(ocsdError(OCSD_ERR_SEV_ERROR,OCSD_ERR_INVALID_PARAM_VAL));
246 resp = OCSD_RESP_FATAL_INVALID_PARAM;
250 m_curr_packet_in = p_packet_in;
251 m_index_curr_pkt = index_sop;
252 resp = processPacket();
269 LogError(ocsdError(OCSD_ERR_SEV_ERROR,OCSD_ERR_INVALID_PARAM_VAL));
270 resp = OCSD_RESP_FATAL_INVALID_OP;
276 /* protocol configuration */
277 template <class P, class Pc> ocsd_err_t TrcPktDecodeBase<P, Pc>::setProtocolConfig(const Pc *config)
279 ocsd_err_t err = OCSD_ERR_INVALID_PARAM_VAL;
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.
286 err = onProtocolConfig();
288 m_config_init_ok = true;
296 template <class P, class Pc> void TrcPktDecodeBase<P, Pc>::ClearConfigObj()
306 #endif // ARM_TRC_PKT_DECODE_BASE_H_INCLUDED
308 /* End of File trc_pkt_decode_base.h */