1/* 2 * Copyright 2018 Google, Inc. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: redistributions of source code must retain the above copyright 7 * notice, this list of conditions and the following disclaimer; 8 * redistributions in binary form must reproduce the above copyright 9 * notice, this list of conditions and the following disclaimer in the 10 * documentation and/or other materials provided with the distribution; 11 * neither the name of the copyright holders nor the names of its 12 * contributors may be used to endorse or promote products derived from 13 * this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 19 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * Authors: Gabe Black 28 */ 29 30#ifndef __SYSTEMC_CORE_PROCESS_HH__ 31#define __SYSTEMC_CORE_PROCESS_HH__ 32 33#include <functional> 34#include <memory> 35#include <vector> 36 37#include "base/fiber.hh" 38#include "sim/eventq.hh" 39#include "systemc/core/bindinfo.hh" 40#include "systemc/core/list.hh" 41#include "systemc/core/object.hh" 42#include "systemc/core/sched_event.hh" 43#include "systemc/ext/core/sc_event.hh" 44#include "systemc/ext/core/sc_export.hh" 45#include "systemc/ext/core/sc_interface.hh" 46#include "systemc/ext/core/sc_module.hh" 47#include "systemc/ext/core/sc_port.hh" 48#include "systemc/ext/core/sc_process_handle.hh" 49#include "systemc/ext/utils/sc_report.hh" 50 51namespace sc_gem5 52{ 53 54class Sensitivity 55{ 56 protected: 57 Process *process; 58 59 public: 60 Sensitivity(Process *p) : process(p) {} 61 virtual ~Sensitivity() {} 62 63 virtual void notifyWork(Event *e); 64 void notify(Event *e); 65 void notify() { notify(nullptr); } 66 67 const std::string name(); 68}; 69 70class SensitivityTimeout : virtual public Sensitivity 71{ 72 private: 73 void timeout(); 74 ScEvent timeoutEvent; 75 76 public: 77 SensitivityTimeout(Process *p, ::sc_core::sc_time t); 78 ~SensitivityTimeout(); 79}; 80 81class SensitivityEvent : virtual public Sensitivity 82{ 83 private: 84 const ::sc_core::sc_event *event; 85 86 public: 87 SensitivityEvent(Process *p, const ::sc_core::sc_event *e); 88 ~SensitivityEvent(); 89}; 90 91//XXX This sensitivity can't be reused. To reset it, it has to be deleted and 92//recreated. That works for dynamic sensitivities, but not for static. 93//Fortunately processes can't be statically sensitive to sc_event_and_lists. 94class SensitivityEventAndList : virtual public Sensitivity 95{ 96 private: 97 const ::sc_core::sc_event_and_list *list; 98 int count; 99 100 public: 101 SensitivityEventAndList( 102 Process *p, const ::sc_core::sc_event_and_list *list); 103 ~SensitivityEventAndList(); 104 105 void notifyWork(Event *e) override; 106}; 107 108class SensitivityEventOrList : virtual public Sensitivity 109{ 110 private: 111 const ::sc_core::sc_event_or_list *list; 112 113 public: 114 SensitivityEventOrList( 115 Process *p, const ::sc_core::sc_event_or_list *list); 116 ~SensitivityEventOrList(); 117}; 118 119// Combined sensitivities. These trigger when any of their parts do. 120 121class SensitivityTimeoutAndEvent : 122 public SensitivityTimeout, public SensitivityEvent 123{ 124 public: 125 SensitivityTimeoutAndEvent( 126 Process *p, ::sc_core::sc_time t, const ::sc_core::sc_event *e) : 127 Sensitivity(p), SensitivityTimeout(p, t), SensitivityEvent(p, e) 128 {} 129}; 130 131class SensitivityTimeoutAndEventAndList : 132 public SensitivityTimeout, public SensitivityEventAndList 133{ 134 public: 135 SensitivityTimeoutAndEventAndList( 136 Process *p, ::sc_core::sc_time t, 137 const ::sc_core::sc_event_and_list *eal) : 138 Sensitivity(p), SensitivityTimeout(p, t), 139 SensitivityEventAndList(p, eal) 140 {} 141 142 void notifyWork(Event *e) override; 143}; 144 145class SensitivityTimeoutAndEventOrList : 146 public SensitivityTimeout, public SensitivityEventOrList 147{ 148 public: 149 SensitivityTimeoutAndEventOrList( 150 Process *p, ::sc_core::sc_time t, 151 const ::sc_core::sc_event_or_list *eol) : 152 Sensitivity(p), SensitivityTimeout(p, t), 153 SensitivityEventOrList(p, eol) 154 {} 155}; 156 157typedef std::vector<Sensitivity *> Sensitivities; 158 159 160/* 161 * Pending sensitivities. These are records of sensitivities to install later, 162 * once all the information to configure them is available. 163 */ 164 165class PendingSensitivity 166{ 167 protected: 168 Process *process; 169 170 public: 171 virtual void finalize(Sensitivities &s) = 0; 172 PendingSensitivity(Process *p) : process(p) {} 173 virtual ~PendingSensitivity() {} 174}; 175 176class PendingSensitivityEvent : public PendingSensitivity 177{ 178 private: 179 const sc_core::sc_event *event; 180 181 public: 182 PendingSensitivityEvent(Process *p, const sc_core::sc_event *e) : 183 PendingSensitivity(p), event(e) {} 184 185 void 186 finalize(Sensitivities &s) override 187 { 188 s.push_back(new SensitivityEvent(process, event)); 189 } 190}; 191 192class PendingSensitivityInterface : public PendingSensitivity 193{ 194 private: 195 const sc_core::sc_interface *interface; 196 197 public: 198 PendingSensitivityInterface(Process *p, const sc_core::sc_interface *i) : 199 PendingSensitivity(p), interface(i) 200 {} 201 202 void 203 finalize(Sensitivities &s) override 204 { 205 s.push_back(new SensitivityEvent(process, 206 &interface->default_event())); 207 } 208}; 209 210class PendingSensitivityPort : public PendingSensitivity 211{ 212 private: 213 const sc_core::sc_port_base *port; 214 215 public: 216 PendingSensitivityPort(Process *p, const sc_core::sc_port_base *pb) : 217 PendingSensitivity(p), port(pb) 218 {} 219 220 void 221 finalize(Sensitivities &s) override 222 { 223 for (int i = 0; i < port->size(); i++) { 224 const ::sc_core::sc_event *e = 225 &port->_gem5Interface(i)->default_event(); 226 s.push_back(new SensitivityEvent(process, e)); 227 } 228 } 229}; 230 231class PendingSensitivityExport : public PendingSensitivity 232{ 233 private: 234 const sc_core::sc_export_base *exp; 235 236 public: 237 PendingSensitivityExport(Process *p, const sc_core::sc_export_base *exp) : 238 PendingSensitivity(p), exp(exp) 239 {} 240 241 void 242 finalize(Sensitivities &s) override 243 { 244 s.push_back(new SensitivityEvent(process, 245 &exp->get_interface()->default_event())); 246 } 247}; 248 249class PendingSensitivityFinder : public PendingSensitivity 250{ 251 private: 252 const sc_core::sc_event_finder *finder; 253 254 public: 255 PendingSensitivityFinder(Process *p, const sc_core::sc_event_finder *f) : 256 PendingSensitivity(p), finder(f) 257 {} 258 259 void 260 finalize(Sensitivities &s) override 261 { 262 s.push_back(new SensitivityEvent(process, &finder->find_event())); 263 } 264}; 265 266typedef std::vector<PendingSensitivity *> PendingSensitivities; 267 268 269class Process : public ::sc_core::sc_process_b, public ListNode 270{ 271 public: 272 virtual ::sc_core::sc_curr_proc_kind procKind() const = 0; 273 bool needsStart() const { return _needsStart; }
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