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Update Timer.cpp #17

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Update Timer.cpp #17

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13 changes: 10 additions & 3 deletions src/Timer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,9 @@
// SPDX-License-Identifier: GPL-3.0-or-later

#include "Timer.h"
#define unlikely(x) __builtin_expect(!!(x), 0)

using namespace sc_core;

namespace riscv_tlm::peripherals {

Expand Down Expand Up @@ -69,8 +72,12 @@ namespace riscv_tlm::peripherals {

std::uint64_t notify_time;
// notify needs relative time, mtimecmp works in absolute time
notify_time = m_mtimecmp - m_mtime;


notify_time = m_mtimecmp.to_ulong() - m_mtime.to_ulong();
// FIXed m_mtimecmp should be .gt. m_mtime
if ( unlikely( m_mtimecmp.to_ulong() < m_mtime.to_ulong() ) ) {
m_mtimecmp.range(31, 0) = (0xFFFFFFFF&notify_time)-1;
}
timer_event.notify(sc_core::sc_time(notify_time, sc_core::SC_NS));
break;
default:
Expand Down Expand Up @@ -101,4 +108,4 @@ namespace riscv_tlm::peripherals {

trans.set_response_status(tlm::TLM_OK_RESPONSE);
}
}
}