| 1 | // ========== Copyright Header Begin ========================================== |
| 2 | // |
| 3 | // OpenSPARC T2 Processor File: csr_arb.hpp |
| 4 | // Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved |
| 5 | // 4150 Network Circle, Santa Clara, California 95054, U.S.A. |
| 6 | // |
| 7 | // * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 8 | // |
| 9 | // This program is free software; you can redistribute it and/or modify |
| 10 | // it under the terms of the GNU General Public License as published by |
| 11 | // the Free Software Foundation; version 2 of the License. |
| 12 | // |
| 13 | // This program is distributed in the hope that it will be useful, |
| 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | // GNU General Public License for more details. |
| 17 | // |
| 18 | // You should have received a copy of the GNU General Public License |
| 19 | // along with this program; if not, write to the Free Software |
| 20 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | // |
| 22 | // For the avoidance of doubt, and except that if any non-GPL license |
| 23 | // choice is available it will apply instead, Sun elects to use only |
| 24 | // the General Public License version 2 (GPLv2) at this time for any |
| 25 | // software where a choice of GPL license versions is made |
| 26 | // available with the language indicating that GPLv2 or any later version |
| 27 | // may be used, or where a choice of which version of the GPL is applied is |
| 28 | // otherwise unspecified. |
| 29 | // |
| 30 | // Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 31 | // CA 95054 USA or visit www.sun.com if you need additional information or |
| 32 | // have any questions. |
| 33 | // |
| 34 | // ========== Copyright Header End ============================================ |
| 35 | #ifndef INC_csr_arb_hpp__ |
| 36 | #define INC_csr_arb_hpp__ |
| 37 | |
| 38 | #include "pcie_common/config.hpp" |
| 39 | #include <queue> |
| 40 | |
| 41 | USING_NAMESPACE(std); |
| 42 | using std::pair; |
| 43 | |
| 44 | #include "tlm.h" |
| 45 | using tlm::tlm_transport_if; |
| 46 | using tlm::tlm_slave_if; |
| 47 | |
| 48 | namespace pcie |
| 49 | { |
| 50 | template < typename REQ , typename RSP , int N =1> |
| 51 | class csr_arb : public sc_module |
| 52 | { |
| 53 | public: |
| 54 | typedef sc_port< tlm_slave_if< REQ , RSP > > port_type; |
| 55 | |
| 56 | port_type master_port[N]; |
| 57 | |
| 58 | sc_port< tlm_transport_if< REQ , RSP > , 1 > slave_port; |
| 59 | |
| 60 | sc_in< bool > csr_clock; |
| 61 | |
| 62 | SC_HAS_PROCESS( csr_arb ); |
| 63 | |
| 64 | csr_arb( sc_module_name module_name , |
| 65 | const sc_time &t = sc_time( 1 , SC_NS ) ) : |
| 66 | sc_module( module_name ) , |
| 67 | slave_port("slave_port") , |
| 68 | arb_t( t ) |
| 69 | { |
| 70 | LOG_DEBUG << "csr_arb()"; |
| 71 | SC_THREAD( run ); |
| 72 | } |
| 73 | |
| 74 | void add_interface( port_type *port , const int priority ) { |
| 75 | if_map.insert( multimap_type::value_type( priority , port ) ); |
| 76 | } |
| 77 | |
| 78 | protected: |
| 79 | typedef multimap< int , port_type * > multimap_type; |
| 80 | multimap_type if_map; |
| 81 | |
| 82 | typedef struct { |
| 83 | REQ req; |
| 84 | port_type *port; |
| 85 | } req_port_type; |
| 86 | |
| 87 | queue < req_port_type* > event_q, read_q, write_q; |
| 88 | |
| 89 | sc_time arb_t; |
| 90 | |
| 91 | virtual void run() { |
| 92 | req_port_type *next_rp; |
| 93 | RSP rsp; |
| 94 | LOG_DEBUG << "csr_arb::run()"; |
| 95 | for( ;; ) { |
| 96 | wait( csr_clock.posedge_event() ); |
| 97 | |
| 98 | gather_requests (); |
| 99 | // Process setup requests |
| 100 | while (!event_q.empty()) { |
| 101 | next_rp = event_q.front(); |
| 102 | event_q.pop(); |
| 103 | //LOG_DEBUG << "Calling Event Req : " << next_rp->port->name(); |
| 104 | rsp = slave_port->transport((next_rp->req)); |
| 105 | //LOG_DEBUG << "Putting Event Req : " << next_rp->port->name(); |
| 106 | (*(next_rp->port))->put(rsp); |
| 107 | //LOG_DEBUG << "Putting Event Req (done): " << next_rp->port->name(); |
| 108 | delete next_rp; |
| 109 | //LOG_DEBUG << "Delete ReqPacket"; |
| 110 | } |
| 111 | while (!write_q.empty()) { |
| 112 | next_rp = write_q.front(); |
| 113 | write_q.pop(); |
| 114 | //LOG_DEBUG << "Calling Write Req"; |
| 115 | rsp = slave_port->transport((next_rp->req)); |
| 116 | //LOG_DEBUG << "Putting Write Req"; |
| 117 | (*(next_rp->port))->put(rsp); |
| 118 | delete next_rp; |
| 119 | //LOG_DEBUG << "Delete ReqPacket"; |
| 120 | |
| 121 | } |
| 122 | while (!read_q.empty()) { |
| 123 | next_rp = read_q.front(); |
| 124 | read_q.pop(); |
| 125 | //LOG_DEBUG << "Calling Read Req"; |
| 126 | rsp = slave_port->transport((next_rp->req)); |
| 127 | //LOG_DEBUG << "Putting Read Req"; |
| 128 | (*(next_rp->port))->put(rsp); |
| 129 | delete next_rp; |
| 130 | //LOG_DEBUG << "Delete ReqPacket"; |
| 131 | } |
| 132 | }//end for(;;) |
| 133 | }//end run() |
| 134 | |
| 135 | virtual void gather_requests () { |
| 136 | multimap_type::iterator i; |
| 137 | port_type *p; |
| 138 | REQ req; |
| 139 | req_port_type *rp; |
| 140 | |
| 141 | for (i = if_map.begin(); i != if_map.end(); ++i) { |
| 142 | p = (*i).second; |
| 143 | if ( (*p)->nb_get(req) ) { |
| 144 | rp = new req_port_type; |
| 145 | //LOG_DEBUG << "NEW ReqPacket"; |
| 146 | rp->req = req; |
| 147 | rp->port = p; |
| 148 | |
| 149 | switch (rp->req._cmd) { |
| 150 | case CSR_RESET: |
| 151 | LOG_DEBUG << "CSR_RESET : " << rp->port->name(); |
| 152 | event_q.push(rp); |
| 153 | break; |
| 154 | case CSR_CREATE: |
| 155 | LOG_DEBUG << "CSR_CREATE : " << rp->port->name(); |
| 156 | event_q.push(rp); |
| 157 | break; |
| 158 | case CSR_SETEVENT: |
| 159 | LOG_DEBUG << "CSR_SETEVENT : " << rp->port->name(); |
| 160 | event_q.push(rp); |
| 161 | break; |
| 162 | case CSR_ISMAPPED: |
| 163 | LOG_DEBUG << "CSR_ISMAPPED: " << rp->port->name(); |
| 164 | read_q.push(rp); |
| 165 | break; |
| 166 | case CSR_READ: |
| 167 | LOG_DEBUG << "CSR_READ: " << rp->port->name(); |
| 168 | read_q.push(rp); |
| 169 | break; |
| 170 | case CSR_WRITE: |
| 171 | LOG_DEBUG << "CSR_WRITE : " << rp->port->name(); |
| 172 | write_q.push(rp); |
| 173 | break; |
| 174 | case CSR_WRITE_MASK: |
| 175 | LOG_DEBUG << "CSR_WRITE_FIELD : " << rp->port->name(); |
| 176 | write_q.push(rp); |
| 177 | break; |
| 178 | } |
| 179 | } |
| 180 | } |
| 181 | }//end gather_requests() |
| 182 | }; |
| 183 | }; |
| 184 | #endif //INC_csr_arb_hpp__ |