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/* Asynchronous SDM NoC (C)2011 Wei Song Advanced Processor Technologies Group Computer Science, the Univ. of Manchester, UK Authors: Wei Song wsong83@gmail.com License: LGPL 3.0 or later Package definition. History: 19/08/2008 Initial version. <wsong83@gmail.com> 04/08/2008 Add the check empty function. <wsong83@gmail.com> 22/09/2008 Override the copy and = operations. <wsong83@gmail.com> 21/09/2010 Support VC and use templates. <wsong83@gmail.com> 19/11/2010 Fixed to support the minimal 8bit VC. <wsong83@gmail.com> 27/05/2011 Clean up for opensource. <wsong83@gmail.com> 30/05/2011 Clear the addresses field when clear a flit. <wsong83@gmail.com> */ #ifndef PDU_DEF_H_ #define PDU_DEF_H_ #include <ostream> #include <iomanip> using namespace std; // flit types: data, idle, head and tail enum ftype_t {F_DAT, F_IDLE, F_HD, F_TL}; template<unsigned int BW> class pdu_flit; // override the method to stream out flits template<unsigned int BW> ostream& operator<< (ostream& os, const pdu_flit<BW>& dd) { switch(dd.ftype) { case F_DAT: os << hex << "<DATA:" << (unsigned int)(dd.vcn) << ":" << (unsigned int)(dd.prio) << ":"; for(unsigned int i=0; i<BW; i++) os << setw(2) << setfill('0') << (unsigned int)(dd[i]); os << setw(0) << dec << ">"; break; case F_HD: os << hex << "<HEAD:" << (unsigned int)(dd.vcn) << ":" << (unsigned int)(dd.prio) << ":" << (unsigned int)(dd.addrx) << "," << (unsigned int)(dd.addry) << ":"; for(unsigned int i=0; i<BW-1; i++) os << setw(2) << setfill('0') << (unsigned int)(dd[i]); os << setw(0) << dec << ">"; break; case F_TL: os << hex << "<TAIL:" << (unsigned int)(dd.vcn) << ":" << (unsigned int)(dd.prio) << ":"; for(unsigned int i=0; i<BW; i++) os << setw(2) << setfill('0') << (unsigned int)(dd[i]); os << setw(0) << dec << ">"; break; case F_IDLE: os << "<IDLE>" ; break; default: os << "<ERR!>" ; break; } return os; } // flit used in NoC communication template<unsigned int BW> class pdu_flit { public: unsigned char vcn; unsigned char prio; ftype_t ftype; unsigned int addrx, addry; private: unsigned char data [BW]; void copy(const pdu_flit<BW>& dd) { vcn = dd.vcn; prio = dd.prio; ftype = dd.ftype; addrx = dd.addrx; addry = dd.addry; for(unsigned int i=0; i<BW; i++) data[i] = dd.data[i]; } public: pdu_flit() : vcn(0), prio(0), ftype(F_IDLE) { for(unsigned int i=0; i<BW; i++) data[i] = 0; } void clear(){ // clear the flit vcn = 0; prio = 0; ftype = F_IDLE; addrx = 0; addry = 0; for(unsigned int i=0; i<BW; i++) data[i] = 0; } unsigned char& operator[] (unsigned int index){ // read as a vector return data[index]; } const unsigned char& operator[] (unsigned int index) const { // read as a vector return data[index]; } friend ostream& operator<< <BW> (ostream& os, const pdu_flit<BW>& dd); // output to standard output stream pdu_flit(const pdu_flit<BW>& dd){ // override the default copy operation copy(dd); } pdu_flit& operator=(const pdu_flit<BW>& dd){ // override the default eque with operation copy(dd); return(*this); } }; //=============================================================================== // method to stream out frames template<unsigned int BW> class pdu_frame; template<unsigned int BW> ostream& operator<< (ostream& os, const pdu_frame<BW>& dd) { os << hex << "<FRAME:p" << (unsigned int)(dd.prio) << ":a" << (unsigned int)(dd.addrx) << "," << (unsigned int)(dd.addry) << ":s" << dd.fsize << ":"; // os << setw(2) << setfill('0'); for(unsigned int i=0; i<dd.fsize; i++) os << setw(2) << setfill('0') << (unsigned int)(dd[i]); os << setw(0) << dec << ">"; return os; } // frame definition template<unsigned int BW> class pdu_frame{ public: unsigned int addrx, addry; unsigned char prio; unsigned int fsize; int rptr, wptr; private: unsigned char * data; // data field public: pdu_frame() : addrx(0), addry(0), prio(0), fsize(0), rptr(-1), wptr(0), data(NULL) {} pdu_frame(unsigned int fs) : addrx(0), addry(0), prio(0), fsize(fs), rptr(-1), wptr(0) { data = new unsigned char [fs]; } ~pdu_frame() { if(data != NULL) { delete[] data; data = NULL; } } void clear() { rptr = -1; wptr = 0; } unsigned char& operator[] (unsigned int index) { if(index > fsize) // need to enlarge the buf resize(index); return data[index]; } const unsigned char& operator[] (unsigned int index) const { return data[index]; } bool empty() { return ((rptr == wptr) || (wptr == 0)); } void push(unsigned char dd) { if(wptr==fsize) resize(fsize+1); data[wptr++] = dd; } unsigned char pop() { if(empty()) return 0; return data[rptr++]; } pdu_frame& operator<< (const pdu_flit<BW>& dd) { switch(dd.ftype) { case F_DAT: for(unsigned int i=0; i<BW; i++) push(dd[i]); break; case F_HD: addrx = dd.addrx; addry = dd.addry; prio = dd.prio; for(unsigned int i=0; i<BW-1; i++) push(dd[i]); break; case F_TL: for(unsigned int i=0; i<BW; i++) push(dd[i]); resize(wptr); break; default: break; } return *this; } pdu_frame& operator>> (pdu_flit<BW>& dd) { if(rptr==-1) { dd.ftype = F_HD; rptr++; for(unsigned int i=0; i<BW-1; i++) { dd[i] = pop(); } dd.addrx = addrx; dd.addry = addry; } else { dd.ftype = F_DAT; for(unsigned int i=0; i<BW; i++) { dd[i] = pop(); } } if(empty()) dd.ftype = F_TL; return *this; } // friend ostream& operator<< <BW> (ostream& os, const pdu_frame<BW>& dd); pdu_frame(const pdu_frame<BW>& dd) { copy(dd); } pdu_frame<BW>& operator=(const pdu_frame<BW>& dd) { copy(dd); return (*this); } unsigned int psize() { unsigned int prac_size = fsize; while(1) { if(data[prac_size-1] == 0) prac_size--; else break; } return prac_size; } private: void resize(unsigned int fs) { // boundry check if(fs == fsize) return; // resize the buffer unsigned char * buf = new unsigned char [fs]; for(unsigned int i=0; (i<fsize && i<fs); i++) { buf[i] = data[i]; } fsize = fs; delete[] data; data = buf; } void copy(const pdu_frame<BW>& dd) { addrx = dd.addrx; addry = dd.addry; prio = dd.prio; resize(dd.fsize); rptr = dd.rptr; wptr = dd.wptr; for(unsigned int i=0; i<fsize; i++) { data[i] = dd.data[i]; } } }; #endif /* PDU_DEF_H_ */
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