74 lines
1.9 KiB
C++
74 lines
1.9 KiB
C++
/*!
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\file Timer.h
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\brief Basic TLM-2 Timer module
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\author Màrius Montón
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\date January 2019
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*/
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// SPDX-License-Identifier: GPL-3.0-or-later
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#ifndef __TIMER_H__
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#define __TIMER_H__
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#include <iostream>
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#include <fstream>
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#define SC_INCLUDE_DYNAMIC_PROCESSES
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#include "systemc"
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#include "tlm.h"
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#include "tlm_utils/simple_target_socket.h"
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#include "BusCtrl.h"
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namespace riscv_tlm {
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namespace peripherals {
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/**
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* @brief Simple timer peripheral
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*
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* It runs a 1 ns (nanoseconds) pace
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*
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*/
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class Timer : sc_core::sc_module {
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public:
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// TLM-2 socket, defaults to 32-bits wide, base protocol
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tlm_utils::simple_target_socket<Timer> socket;
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tlm_utils::simple_initiator_socket<Timer> irq_line;
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/**
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*
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* @brief Constructor
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* @param name module name
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*/
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explicit Timer(sc_core::sc_module_name const &name);
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/**
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* @brief Waits for event timer_event and triggers an IRQ
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*
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* Waits for event timer_event and triggers an IRQ (if it is not already
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* triggered).
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* After that, it posts the timer_event to 20 ns in the future to clear the IRQ
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* line.
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*
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*/
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[[noreturn]] void run();
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/**
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*
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* @brief TLM-2.0 socket implementation
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* @param trans TLM-2.0 transaction
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* @param delay transaction delay time
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*/
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virtual void b_transport(tlm::tlm_generic_payload &trans,
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sc_core::sc_time &delay);
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private:
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sc_dt::sc_uint<64> m_mtime; /**< mtime register */
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sc_dt::sc_uint<64> m_mtimecmp; /**< mtimecmp register */
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sc_core::sc_event timer_event; /**< event */
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};
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}
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}
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#endif
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