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cours3: soclib_vci_local_crossbar_simple.h

File soclib_vci_local_crossbar_simple.h, 15.0 KB (added by fpecheux, 16 years ago)
Un premier interconnect compatible VCI, avec sorties de Mealy

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1	//////////////////////////////////////////////////////////////////////////
2	// File : soclib_vci_local_crossbar.h
3	// Date : 15/04/2004
4	// author : Alain Greiner
5	// Copyright : UPMC - LIP6
6	//
7	// This component is a modified version of the generic VCI ADVANCED local crossbar.
8	// It can be used in a one-level hierarchical interconnect.
9	//
10	// This component contains two fully independant crossbars :
11	// - The requests crossbar contains as many multiplexors as the number
12	// of initiator ports (i.e. NB_TARGET) . Each multiplexor is controled
13	// by a private FSM. Each initiator port is either "not allocated",
14	// or "allocated" to a single target port.
15	// - The response crossbar contains as many multiplexors as the number
16	// of target ports (i.e. NB_INIT) . Each multiplexor is controled
17	// by a private FSM. Each target port is either "not allocated",
18	// or "allocated" to a single initiator port.
19	//
20	// The CMDACK and RSPACK signals are not controled by the corresponding FSM but by every FSM of the other type,
21	// using a logical door .
22	//
23	//
24	// Only the FSM where the packet is supposed to go is allocated to the VCI port the packet comes from.
25	// The FSM where it comes from is not aware that an FSM is allocated to its port, therefore it can be allocated
26	// to an other port.
27	//
28	// Those crossbar are not "fully connected":
29	// - a local target port can be connected to a local initiator port.
30	// - a local target port can be connected to a micro-network initiator port.
31	//
32	// There is no buffer to store VCI requests or responses in this component,
33	// and all output signals are Mealy signals.
34	//
35	//////////////////////////////////////////////////////////////////////////
36	// This component has three "constructor" parameters :
37	// - char* name : instance name
38	// - int* indexes : global index of the subsystem
39	// - SOCLIB_MAPPING_TABLE segtab : the segment table
40	//////////////////////////////////////////////////////////////////////////
41	// This component has 10 "template" parameters :
42	// - int NB_INIT : number of VCI initiators
43	// - int NB_TARGET : number of VCI targets
44	//
45	// (Using shorthand VCI_PARAM for these ones)
46	// - int ADDRSIZE : number of bits for the VCI ADDRESS field
47	// - int CELLSIZE : number of bytes for the VCI DATA field
48	// - int ERRSIZE : number of extra bits for the VCI ERROR field
49	// - int PLENSIZE : number of extra bits for the VCI PLEN field
50	// - int CLENSIZE : number of extra bits for the VCI CLEN field
51	// - int SRCIDSIZE : number of bits for the VCI SRCID field
52	// - int TRDIDSIZE : number of bits for the VCI TRDID field
53	// - int PKTIDSIZE : number of bits for the VCI PKTID field
54	//////////////////////////////////////////////////////////////////////////
55
56	#ifndef SOCLIB_VCI_LOCAL_CROSSBAR_SIMPLE_H
57	#define SOCLIB_VCI_LOCAL_CROSSBAR_SIMPLE_H
58
59	#include <systemc.h>
60	#include "shared/soclib_vci_interfaces.h"
61	#include "shared/soclib_mapping_table.h"
62
63	///////////////////////////////////////////////////////////
64	// Structure definition
65	//////////////////////////////////////////////////////////
66
67	template<int NB_INIT,
68	int NB_TARGET,
69	VCI_PARAM_DECLAR>
70
71	struct SOCLIB_VCI_LOCAL_CROSSBAR_SIMPLE : sc_module{
72
73	// STRUCTURAL PARAMETERS
74
75	const char *NAME; // instance name
76	int *GLOBAL_ROUTING_TABLE;
77	int *LOCAL_ROUTING_TABLE;
78	int GLOBAL_ADDR_OFFSET, GLOBAL_ADDR_MASK, GLOBAL_ADDR;
79	int LOCAL_ADDR_OFFSET, LOCAL_ADDR_MASK;
80	int GLOBAL_ID_OFFSET, GLOBAL_ID_MASK, GLOBAL_ID;
81	int LOCAL_ID_OFFSET, LOCAL_ID_MASK;
82
83	#define GLOBAL_ADDR_OF(x) (((x)>>GLOBAL_ADDR_OFFSET)&GLOBAL_ADDR_MASK)
84	#define LOCAL_ADDR_OF(x) (((x)>>LOCAL_ADDR_OFFSET)&LOCAL_ADDR_MASK)
85	#define GLOBAL_ID_OF(x) (((x)>>GLOBAL_ID_OFFSET)&GLOBAL_ID_MASK)
86	#define LOCAL_ID_OF(x) (((x)>>LOCAL_ID_OFFSET)&LOCAL_ID_MASK)
87
88	// I/O PORTS
89
90	sc_in<bool> CLK ;
91	sc_in<bool> RESETN;
92	// VCI Target ports connected to the local initiators
93	ADVANCED_VCI_TARGET<VCI_PARAM> TLOC_VCI[NB_INIT];
94	// VCI Initiator ports connected to the local targets
95	ADVANCED_VCI_INITIATOR<VCI_PARAM> ILOC_VCI[NB_TARGET];
96
97	// REGISTERS
98
99	// TLOC FSMs
100	sc_signal<bool> TLOC_ALLOCATED[NB_INIT]; // state of the local target ports
101	sc_signal<int> TLOC_INDEX[NB_INIT];
102
103
104	// ILOC FSMs
105	sc_signal<bool> ILOC_ALLOCATED[NB_TARGET]; // state of the local initiator ports
106	sc_signal<int> ILOC_INDEX[NB_TARGET];
107
108	////////////////////////////////////////////////
109	// constructor
110	////////////////////////////////////////////////
111
112	SC_HAS_PROCESS(SOCLIB_VCI_LOCAL_CROSSBAR_SIMPLE);
113
114	SOCLIB_VCI_LOCAL_CROSSBAR_SIMPLE ( sc_module_name insname,
115	int *indexes,
116	SOCLIB_MAPPING_TABLE mapping_table)
117	{
118	int level;
119	#ifdef SOCVIEW
120	char newname[100];
121
122	for (int i=0;i<NB_INIT;i++)
123	{
124	sprintf(newname,"TLOC_ALLOCATED_%2.2d",i);
125	TLOC_ALLOCATED[i].rename(newname);
126	sprintf(newname,"TLOC_INDEX_%2.2d",i);
127	TLOC_INDEX[i].rename(newname);
128	}
129
130	for (int i=0;i<NB_TARGET;i++)
131	{
132	sprintf(newname,"ILOC_ALLOCATED_%2.2d",i);
133	ILOC_ALLOCATED[i].rename(newname); // allocation register
134	sprintf(newname,"ILOC_INDEX_%2.2d",i);
135	ILOC_INDEX[i].rename(newname); // state of the target output port
136	}
137	#endif
138	SC_METHOD(transition);
139	sensitive_pos << CLK;
140
141	SC_METHOD(genMealy);
142	sensitive_neg << CLK;
143
144	for (int i = 0 ; i < NB_TARGET ; i++) {
145	sensitive << ILOC_VCI[i].CMDACK;
146	sensitive << ILOC_VCI[i].RSPVAL;
147	sensitive << ILOC_VCI[i].RDATA;
148	sensitive << ILOC_VCI[i].REOP;
149	sensitive << ILOC_VCI[i].RERROR;
150	sensitive << ILOC_VCI[i].RTRDID;
151	sensitive << ILOC_VCI[i].RPKTID;
152	sensitive << ILOC_VCI[i].RSRCID;
153	}
154
155	for (int i = 0 ; i < NB_INIT ; i++) {
156	sensitive << TLOC_VCI[i].RSPACK;
157	sensitive << TLOC_VCI[i].CMDVAL;
158	sensitive << TLOC_VCI[i].ADDRESS;
159	sensitive << TLOC_VCI[i].WDATA;
160	sensitive << TLOC_VCI[i].CMD;
161	sensitive << TLOC_VCI[i].EOP;
162	sensitive << TLOC_VCI[i].PLEN;
163	sensitive << TLOC_VCI[i].CONS;
164	sensitive << TLOC_VCI[i].CONTIG;
165	sensitive << TLOC_VCI[i].CFIXED;
166	sensitive << TLOC_VCI[i].WRAP;
167	sensitive << TLOC_VCI[i].CLEN;
168	sensitive << TLOC_VCI[i].TRDID;
169	sensitive << TLOC_VCI[i].PKTID;
170	sensitive << TLOC_VCI[i].SRCID;
171	}
172
173	NAME = (const char*) insname;
174	for (level = 0; indexes[level]!=-1; ++level)
175	/**/;
176	GLOBAL_ID = mapping_table.ident(level, indexes);
177	NAME = (const char*) insname;
178	mapping_table.paramsTo( level,
179	GLOBAL_ADDR_OFFSET, GLOBAL_ADDR_MASK,
180	GLOBAL_ID_OFFSET, GLOBAL_ID_MASK);
181	mapping_table.localParams( level,
182	LOCAL_ADDR_OFFSET, LOCAL_ADDR_MASK,
183	LOCAL_ID_OFFSET, LOCAL_ID_MASK );
184
185	GLOBAL_ROUTING_TABLE = new int[GLOBAL_ADDR_MASK+1];
186	mapping_table.initRoutingTableTo(level, indexes, GLOBAL_ROUTING_TABLE);
187
188	LOCAL_ROUTING_TABLE = new int[LOCAL_ADDR_MASK+1];
189	mapping_table.initLocalRoutingTable(level, indexes, LOCAL_ROUTING_TABLE);
190
191	// Checking structural parameters
192
193	if ((NB_TARGET > 16) \|\| (NB_TARGET < 1)) {
194	printf("Error in the SOCLIB_VCI_LOCAL_CROSSBAR component : %s\n", NAME);
195	printf("The NB_TARGET parameter cannot be larger than 16\n");
196	sc_stop();
197	}
198
199	if ((NB_INIT > 16) \|\| (NB_INIT < 1)) {
200	printf("Error in the SOCLIB_VCI_LOCAL_CROSSBAR component : %s\n", NAME);
201	printf("The NB_INIT parameter cannot be larger than 16\n");
202	sc_stop();
203	}
204
205	printf("Successful Instanciation of SOCLIB_VCI_LOCAL_CROSSBAR : %s\n", NAME);
206
207	}; // end constructor
208
209	/////////////////////////////////////////////////////////////
210	// transition()
211	/////////////////////////////////////////////////////////////
212
213	void transition() {
214	// INITIALISATION
215	if (RESETN == false) {
216	for (int n = 0 ; n < NB_TARGET ; n++) {
217	ILOC_ALLOCATED[n] = false;
218	ILOC_INDEX[n] = 0;
219	}
220	for (int n = 0 ; n < NB_INIT ; n++) {
221	TLOC_ALLOCATED[n] = false;
222	TLOC_INDEX[n] = 0;
223	}
224	return;
225	} // end RESETN
226
227	// Loop on the TLOC FSMs
228
229	for(int t = 0 ; t < NB_INIT ; t++) {
230	if(TLOC_ALLOCATED[t] == false) { // local target port not allocated
231	for(int i = 0 ; i < NB_TARGET ; i++) {
232	int l = (i + TLOC_INDEX[t] + 1) % NB_TARGET;
233	if(ILOC_VCI[l].RSPVAL == true) {
234	int id = (int)ILOC_VCI[l].RSRCID.read();
235	int global_index = GLOBAL_ID_OF(id);
236	int local_index = LOCAL_ID_OF(id);
237	if ((global_index == GLOBAL_ID) && (local_index == t)) {
238	TLOC_ALLOCATED[t] = true;
239	TLOC_INDEX[t] = l;
240	break;
241	}
242	}
243	} // end for i
244	} else { // local target port allocated
245	// it is allocated to a local initiator port
246	if((ILOC_VCI[TLOC_INDEX[t]].RSPVAL == true) &&
247	(TLOC_VCI[t].RSPACK == true) &&
248	(ILOC_VCI[TLOC_INDEX[t]].REOP == true)) { TLOC_ALLOCATED[t] = false; }
249	}
250	} // end for t
251
252	// Loop on the ILOC FSMs
253
254	for(int i = 0 ; i < NB_TARGET ; i++) {
255	if(ILOC_ALLOCATED[i] == false) { // local initiator port not allocated
256	for(int t = 0 ; t < NB_INIT ; t++) {
257	int u = (t + ILOC_INDEX[i] + 1) % NB_INIT;
258	if(TLOC_VCI[u].CMDVAL == true) {
259	unsigned int address = TLOC_VCI[u].ADDRESS.read();
260	int global_index = GLOBAL_ROUTING_TABLE[GLOBAL_ADDR_OF(address)];
261	int local_index = LOCAL_ROUTING_TABLE[LOCAL_ADDR_OF(address)];
262	if (local_index == i && global_index == GLOBAL_ID) {
263	ILOC_ALLOCATED[i] = true;
264	ILOC_INDEX[i] = u;
265
266	break;
267	}
268	}
269	} // end for t
270	} else { // local initiator port allocated
271	if((TLOC_VCI[ILOC_INDEX[i]].CMDVAL == true) &&
272	(ILOC_VCI[i].CMDACK == true) &&(TLOC_VCI[ILOC_INDEX[i]].EOP == true))
273	{ ILOC_ALLOCATED[i] = false;}
274	}
275	} // end for i
276
277
278	}; // end transition()
279
280	//////////////////////////////////////////////////////:
281	// genMealy()
282	//////////////////////////////////////////////////////:
283
284	void genMealy()
285	{
286
287	// VCI local target ports
288
289	for (int i=0 ; i<NB_INIT ; i++) {
290	if (TLOC_ALLOCATED[i] == true) { // allocated
291	int k = TLOC_INDEX[i];
292
293	TLOC_VCI[i].RSPVAL = ILOC_VCI[k].RSPVAL.read();
294	TLOC_VCI[i].RERROR = ILOC_VCI[k].RERROR.read();
295	TLOC_VCI[i].REOP = ILOC_VCI[k].REOP.read();
296	TLOC_VCI[i].RTRDID = ILOC_VCI[k].RTRDID.read();
297	TLOC_VCI[i].RPKTID = ILOC_VCI[k].RPKTID.read();
298	TLOC_VCI[i].RSRCID = ILOC_VCI[k].RSRCID.read();
299	TLOC_VCI[i].RDATA = ILOC_VCI[k].RDATA.read();
300
301	} else { // not allocated
302	TLOC_VCI[i].RSPVAL = false;
303	TLOC_VCI[i].RERROR = 0;
304	TLOC_VCI[i].REOP = false;
305	TLOC_VCI[i].RTRDID = 0;
306	TLOC_VCI[i].RPKTID = 0;
307	TLOC_VCI[i].RSRCID = 0;
308	TLOC_VCI[i].RDATA = 0;
309	}
310	}//endfor
311
312	// VCI local initiator ports
313
314	for (int i=0 ; i<NB_TARGET ; i++) {
315	if (ILOC_ALLOCATED[i] == true) { // allocated
316	int j = ILOC_INDEX[i];
317
318	ILOC_VCI[i].CMDVAL = TLOC_VCI[j].CMDVAL.read();
319	ILOC_VCI[i].ADDRESS = TLOC_VCI[j].ADDRESS.read();
320	ILOC_VCI[i].WDATA = TLOC_VCI[j].WDATA.read();
321	ILOC_VCI[i].BE = TLOC_VCI[j].BE.read();
322	ILOC_VCI[i].CMD = TLOC_VCI[j].CMD.read();
323	ILOC_VCI[i].PLEN = TLOC_VCI[j].PLEN.read();
324	ILOC_VCI[i].EOP = TLOC_VCI[j].EOP.read();
325	ILOC_VCI[i].CONS = TLOC_VCI[j].CONS.read();
326	ILOC_VCI[i].CONTIG = TLOC_VCI[j].CONTIG.read();
327	ILOC_VCI[i].CFIXED = TLOC_VCI[j].CFIXED.read();
328	ILOC_VCI[i].WRAP = TLOC_VCI[j].WRAP.read();
329	ILOC_VCI[i].CLEN = TLOC_VCI[j].CLEN.read();
330	ILOC_VCI[i].TRDID = TLOC_VCI[j].TRDID.read();
331	ILOC_VCI[i].PKTID = TLOC_VCI[j].PKTID.read();
332	ILOC_VCI[i].SRCID = TLOC_VCI[j].SRCID.read();
333	} else { // not allocated
334	ILOC_VCI[i].CMDVAL = false;
335	ILOC_VCI[i].ADDRESS = 0;
336	ILOC_VCI[i].WDATA = 0;
337	ILOC_VCI[i].BE = 0;
338	ILOC_VCI[i].CMD = 0;
339	ILOC_VCI[i].PLEN = 0;
340	ILOC_VCI[i].EOP = false;
341	ILOC_VCI[i].CONS = false;
342	ILOC_VCI[i].CONTIG = false;
343	ILOC_VCI[i].CFIXED = false;
344	ILOC_VCI[i].WRAP = false;
345	ILOC_VCI[i].CLEN = 0;
346	ILOC_VCI[i].TRDID = 0;
347	ILOC_VCI[i].PKTID = 0;
348	ILOC_VCI[i].SRCID = 0;
349	}
350	} // end for
351
352	// Each ack output is controlled by the FSM that is allocated on the VCI port at this time
353
354	//for the ILOCs
355	bool iloc_rspack;
356	for(int j = 0; j<NB_TARGET; j++){
357	iloc_rspack = 0;
358	for ( int i = 0; i<NB_INIT; i++){
359	iloc_rspack = iloc_rspack \| ((TLOC_VCI[i].RSPACK)&&(TLOC_ALLOCATED[i])&&(TLOC_INDEX[i]==j));
360	}
361	ILOC_VCI[j].RSPACK=iloc_rspack;
362	}
363
364	//for the TLOCs
365	bool tloc_cmdack;
366	for(int i = 0; i < NB_INIT; i++){
367	tloc_cmdack = 0;
368	for ( int j = 0; j<NB_TARGET; j++){
369	tloc_cmdack = tloc_cmdack \| ((ILOC_VCI[j].CMDACK)&&(ILOC_ALLOCATED[j])&&(ILOC_INDEX[j]==i));
370	}
371	TLOC_VCI[i].CMDACK=tloc_cmdack;
372	}
373
374
375	}; // end genMealy()
376
377
378	}; // end structure SOCLIB_VCI_LOCAL_CROSSBAR_SIMPLE
379
380	#undef LOCAL_PORT_ALLOCATED
381	#undef GLOBAL_ADDR_OF
382	#undef LOCAL_ADDR_OF
383	#undef GLOBAL_ID_OF
384	#undef LOCAL_ID_OF
385
386	#endif

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