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Line No. Rev Author Line
1 30 wsong0210 
/*
2 
 Asynchronous SDM NoC
3 
 (C)2011 Wei Song
4 
 Advanced Processor Technologies Group
5 
 Computer Science, the Univ. of Manchester, UK
6 
 
7 
 Authors:
8 
 Wei Song     wsong83@gmail.com
9 
 
10 
 License: LGPL 3.0 or later
11 
 
12 
 Package definition.
13 
 
14 
 History:
15 
 19/08/2008  Initial version. <wsong83@gmail.com>
16 
 04/08/2008  Add the check empty function. <wsong83@gmail.com>
17 
 22/09/2008  Override the copy and = operations.  <wsong83@gmail.com>
18 
 21/09/2010  Support VC and use templates. <wsong83@gmail.com>
19 
 19/11/2010  Fixed to support the minimal 8bit VC. <wsong83@gmail.com>
20 
 27/05/2011  Clean up for opensource. <wsong83@gmail.com>
21 32 wsong0210 
 30/05/2011  Clear the addresses field when clear a flit. <wsong83@gmail.com>
22 30 wsong0210 
 
23 
*/
24 
 
25 
#ifndef PDU_DEF_H_
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#define PDU_DEF_H_
27 
 
28 
#include <ostream>
29 
#include <iomanip>
30 
 
31 
using namespace std;
32 
 
33 
// flit types: data, idle, head and tail
34 
enum ftype_t {F_DAT, F_IDLE, F_HD, F_TL};
35 
 
36 
template<unsigned int BW>
37 
class pdu_flit;
38 
 
39 
// override the method to stream out flits
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template<unsigned int BW>
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ostream& operator<< (ostream& os, const pdu_flit<BW>& dd) {
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  switch(dd.ftype) {
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  case F_DAT:
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    os << hex << "<DATA:" << (unsigned int)(dd.vcn) << ":" << (unsigned int)(dd.prio) << ":";
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    for(unsigned int i=0; i<BW; i++)
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      os << setw(2) << setfill('0') << (unsigned int)(dd[i]);
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    os << setw(0) << dec << ">";
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    break;
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  case F_HD:
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    os << hex << "<HEAD:" << (unsigned int)(dd.vcn) << ":" << (unsigned int)(dd.prio) << ":" << (unsigned int)(dd.addrx) << "," << (unsigned int)(dd.addry) << ":";
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    for(unsigned int i=0; i<BW-1; i++)
52 
      os << setw(2) << setfill('0') << (unsigned int)(dd[i]);
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    os << setw(0) << dec << ">";
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    break;
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  case F_TL:
56 
    os << hex << "<TAIL:" << (unsigned int)(dd.vcn) << ":" << (unsigned int)(dd.prio) << ":";
57 
    for(unsigned int i=0; i<BW; i++)
58 
      os  << setw(2) << setfill('0') << (unsigned int)(dd[i]);
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    os << setw(0) << dec << ">";
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    break;
61 
  case F_IDLE:
62 
    os << "<IDLE>" ;
63 
    break;
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  default:
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    os << "<ERR!>" ;
66 
    break;
67 
  }
68 
 
69 
  return os;
70 
}
71 
 
72 
// flit used in NoC communication
73 
template<unsigned int BW>
74 
class pdu_flit {
75 
 public:
76 
    unsigned char vcn;
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    unsigned char prio;
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    ftype_t ftype;
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    unsigned int addrx, addry;
80 
 private:
81 
    unsigned char data [BW];
82 
 
83 
     void copy(const pdu_flit<BW>& dd) {
84 
      vcn = dd.vcn;
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      prio = dd.prio;
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      ftype = dd.ftype;
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      addrx = dd.addrx;
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      addry = dd.addry;
89 
      for(unsigned int i=0; i<BW; i++) data[i] = dd.data[i];
90 
    }
91 
 
92 
public:
93 
    pdu_flit()
94 
      : vcn(0), prio(0), ftype(F_IDLE)
95 
    {
96 
      for(unsigned int i=0; i<BW; i++) data[i] = 0;
97 
    }
98 
 
99 
    void clear(){                    // clear the flit
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      vcn = 0;
101 
      prio = 0;
102 
      ftype = F_IDLE;
103 32 wsong0210 
      addrx = 0;
104 
      addry = 0;
105 30 wsong0210 
      for(unsigned int i=0; i<BW; i++) data[i] = 0;
106 
    }
107 
 
108 
    unsigned char& operator[] (unsigned int index){         // read as a vector
109 
      return data[index];
110 
    }
111 
 
112 
    const unsigned char& operator[] (unsigned int index) const {         // read as a vector
113 
      return data[index];
114 
    }
115 
 
116 
    friend ostream& operator<< <BW> (ostream& os, const pdu_flit<BW>& dd);   // output to standard output stream
117 
 
118 
    pdu_flit(const pdu_flit<BW>& dd){                           // override the default copy operation
119 
      copy(dd);
120 
    }
121 
 
122 
    pdu_flit& operator=(const pdu_flit<BW>& dd){                // override the default eque with operation
123 
      copy(dd);
124 
      return(*this);
125 
    }
126 
};
127 
 
128 
//===============================================================================
129 
// method to stream out frames
130 
template<unsigned int BW>
131 
class pdu_frame;
132 
 
133 
template<unsigned int BW>
134 
ostream& operator<< (ostream& os, const pdu_frame<BW>& dd) {
135 
  os << hex << "<FRAME:p" << (unsigned int)(dd.prio) << ":a" << (unsigned int)(dd.addrx) << "," << (unsigned int)(dd.addry) << ":s" << dd.fsize << ":";
136 
  //  os << setw(2) << setfill('0');
137 
  for(unsigned int i=0; i<dd.fsize; i++)
138 
    os << setw(2) << setfill('0') << (unsigned int)(dd[i]);
139 
  os << setw(0) << dec << ">";
140 
  return os;
141 
}
142 
 
143 
// frame definition
144 
template<unsigned int BW>
145 
class pdu_frame{
146 
 
147 
 public:
148 
  unsigned int addrx, addry;
149 
  unsigned char prio;
150 
  unsigned int fsize;
151 
  int rptr, wptr;
152 
 
153 
 private:
154 
  unsigned char * data;                       // data field
155 
 
156 
 public:
157 
  pdu_frame()
158 
    : addrx(0), addry(0), prio(0), fsize(0), rptr(-1), wptr(0), data(NULL)
159 
    {}
160 
 
161 
  pdu_frame(unsigned int fs)
162 
    : addrx(0), addry(0), prio(0), fsize(fs), rptr(-1), wptr(0)
163 
    {
164 
      data = new unsigned char [fs];
165 
    }
166 
 
167 
  ~pdu_frame() {
168 
    if(data != NULL) {
169 
      delete[] data;
170 
      data = NULL;
171 
    }
172 
  }
173 
 
174 
  void clear() {
175 
    rptr = -1;
176 
    wptr = 0;
177 
  }
178 
 
179 
  unsigned char&  operator[] (unsigned int index) {
180 
    if(index > fsize)   // need to enlarge the buf
181 
      resize(index);
182 
 
183 
    return data[index];
184 
  }
185 
 
186 
  const unsigned char&  operator[] (unsigned int index) const {
187 
    return data[index];
188 
  }
189 
 
190 
  bool empty() {
191 
    return ((rptr == wptr) || (wptr == 0));
192 
  }
193 
 
194 
  void push(unsigned char dd) {
195 
    if(wptr==fsize)
196 
      resize(fsize+1);
197 
 
198 
    data[wptr++] = dd;
199 
  }
200 
 
201 
  unsigned char pop() {
202 
    if(empty())
203 
      return 0;
204 
 
205 
    return data[rptr++];
206 
  }
207 
 
208 
  pdu_frame& operator<< (const pdu_flit<BW>& dd) {
209 
    switch(dd.ftype) {
210 
    case F_DAT:
211 
      for(unsigned int i=0; i<BW; i++)
212 
        push(dd[i]);
213 
      break;
214 
    case F_HD:
215 
      addrx = dd.addrx;
216 
      addry = dd.addry;
217 
      prio = dd.prio;
218 
      for(unsigned int i=0; i<BW-1; i++)
219 
        push(dd[i]);
220 
      break;
221 
    case F_TL:
222 
      for(unsigned int i=0; i<BW; i++)
223 
        push(dd[i]);
224 
      resize(wptr);
225 
      break;
226 
    default:
227 
      break;
228 
    }
229 
    return *this;
230 
  }
231 
 
232 
  pdu_frame& operator>> (pdu_flit<BW>& dd) {
233 
    if(rptr==-1) {
234 
      dd.ftype = F_HD;
235 
      rptr++;
236 
      for(unsigned int i=0; i<BW-1; i++) {
237 
        dd[i] = pop();
238 
      }
239 
      dd.addrx = addrx;
240 
      dd.addry = addry;
241 
    } else {
242 
      dd.ftype = F_DAT;
243 
      for(unsigned int i=0; i<BW; i++) {
244 
        dd[i] = pop();
245 
      }
246 
    }
247 
    if(empty())
248 
      dd.ftype = F_TL;
249 
 
250 
    return *this;
251 
  }
252 
 
253 
  //  friend ostream& operator<< <BW> (ostream& os, const pdu_frame<BW>& dd);
254 
 
255 
  pdu_frame(const pdu_frame<BW>& dd) {
256 
    copy(dd);
257 
  }
258 
 
259 
  pdu_frame<BW>& operator=(const pdu_frame<BW>& dd) {
260 
    copy(dd);
261 
    return (*this);
262 
  }
263 
 
264 
  unsigned int psize() {
265 
    unsigned int prac_size = fsize;
266 
    while(1) {
267 
      if(data[prac_size-1] == 0)
268 
            prac_size--;
269 
      else
270 
            break;
271 
    }
272 
    return prac_size;
273 
  }
274 
 
275 
  private:
276 
  void resize(unsigned int fs) {
277 
    // boundry check
278 
    if(fs == fsize)
279 
      return;
280 
 
281 
    // resize the buffer
282 
    unsigned char * buf = new unsigned char [fs];
283 
    for(unsigned int i=0; (i<fsize && i<fs); i++) {
284 
      buf[i] = data[i];
285 
    }
286 
    fsize = fs;
287 
    delete[] data;
288 
    data = buf;
289 
  }
290 
 
291 
  void copy(const pdu_frame<BW>& dd) {
292 
    addrx = dd.addrx;
293 
    addry = dd.addry;
294 
    prio = dd.prio;
295 
    resize(dd.fsize);
296 
    rptr = dd.rptr;
297 
    wptr = dd.wptr;
298 
 
299 
    for(unsigned int i=0; i<fsize; i++) {
300 
      data[i] = dd.data[i];
301 
    }
302 
  }
303 
 
304 
};
305 
 
306 
 
307 
#endif      /* PDU_DEF_H_ */

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