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| -rw-r--r-- | src/systemc/tlm_port_wrapper.hh | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/systemc/tlm_port_wrapper.hh b/src/systemc/tlm_port_wrapper.hh new file mode 100644 index 000000000..0553a18ef --- /dev/null +++ b/src/systemc/tlm_port_wrapper.hh @@ -0,0 +1,124 @@ +/* + * Copyright 2018 Google, Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Gabe Black + */ + +#ifndef __SYSTEMC_TLM_PORT_WRAPPER_HH__ +#define __SYSTEMC_TLM_PORT_WRAPPER_HH__ + +#include "base/logging.hh" +#include "sim/port.hh" +#include "systemc/ext/tlm_core/2/sockets/sockets.hh" + +namespace sc_gem5 +{ + +template <unsigned int BUSWIDTH=32, + typename TYPES=tlm::tlm_base_protocol_types, int N=1, + sc_core::sc_port_policy POL=sc_core::SC_ONE_OR_MORE_BOUND> +class TlmInitiatorWrapper; + +template <unsigned int BUSWIDTH=32, + typename TYPES=tlm::tlm_base_protocol_types, int N=1, + sc_core::sc_port_policy POL=sc_core::SC_ONE_OR_MORE_BOUND> +class TlmTargetWrapper; + +template <unsigned int BUSWIDTH, typename TYPES, int N, + sc_core::sc_port_policy POL> +class TlmInitiatorWrapper : public ::Port +{ + public: + typedef tlm::tlm_base_initiator_socket<BUSWIDTH, + tlm::tlm_fw_transport_if<TYPES>, + tlm::tlm_bw_transport_if<TYPES>, N, POL> + InitiatorSocket; + typedef typename InitiatorSocket::base_target_socket_type TargetSocket; + typedef TlmTargetWrapper<BUSWIDTH, TYPES, N, POL> TargetWrapper; + + InitiatorSocket &initiator() { return _initiator; } + + TlmInitiatorWrapper( + InitiatorSocket &i, const std::string &_name, PortID _id) : + Port(_name, _id), _initiator(i) + {} + + void + bind(::Port &peer) override + { + auto *target = dynamic_cast<TargetWrapper *>(&peer); + fatal_if(!target, "Attempt to bind TLM initiator socket %s to " + "incompatible port %s.", name(), peer.name()); + + initiator().bind(target->target()); + } + + void + unbind() override + { + panic("TLM sockets can't be unbound."); + } + + private: + InitiatorSocket &_initiator; +}; + +template <unsigned int BUSWIDTH, typename TYPES, int N, + sc_core::sc_port_policy POL> +class TlmTargetWrapper : public ::Port +{ + public: + typedef tlm::tlm_base_target_socket<BUSWIDTH, + tlm::tlm_fw_transport_if<TYPES>, + tlm::tlm_bw_transport_if<TYPES>, N, POL> + TargetSocket; + + TargetSocket &target() { return _target; } + + TlmTargetWrapper(TargetSocket &t, const std::string &_name, PortID _id) : + Port(_name, _id), _target(t) + {} + + void + bind(::Port &peer) override + { + // Ignore attempts to bind a target socket. The initiator will + // handle it. + } + + void + unbind() override + { + panic("TLM sockets can't be unbound."); + } + + private: + TargetSocket &_target; +}; + +} // namespace sc_gem5 + +#endif //__SYSTEMC_TLM_PORT_WRAPPER_HH__ |