62 lines
2.0 KiB
C++
62 lines
2.0 KiB
C++
/*
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* Copyright (c) Souldbminer, Lightos and Horizon OC Contributors
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "freq.hpp"
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namespace freq {
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u64 MeasurePtoFreqHz(u32 srcId, u32 multiplier) {
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constexpr u32 win = 16;
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constexpr u32 osc = 32768;
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const u32 val = (srcId << PtoSrcSelShift) | PtoDivSelDiv1 | PtoClkEnable | (win - 1);
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MMIO32(CarBase + CarPtoClkCntCntl) = val;
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(void)MMIO32(CarBase + CarPtoClkCntCntl);
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usleep(2);
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MMIO32(CarBase + CarPtoClkCntCntl) = val | PtoCntRst;
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(void)MMIO32(CarBase + CarPtoClkCntCntl);
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usleep(2);
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MMIO32(CarBase + CarPtoClkCntCntl) = val;
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(void)MMIO32(CarBase + CarPtoClkCntCntl);
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usleep(2);
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MMIO32(CarBase + CarPtoClkCntCntl) = val | PtoCntEn;
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(void)MMIO32(CarBase + CarPtoClkCntCntl);
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usleep((1000000u * win / osc) + 12 + 2); // 502us
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while (MMIO32(CarBase + CarPtoClkCntStatus) & PtoClkCntBusy)
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;
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const u32 cnt = MMIO32(CarBase + CarPtoClkCntStatus) & PtoClkCntMask;
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MMIO32(CarBase + CarPtoClkCntCntl) = 0;
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(void)MMIO32(CarBase + CarPtoClkCntCntl);
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usleep(2);
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return (static_cast<u64>(cnt) * multiplier * osc) / win;
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}
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void Update(HocClkBpmpSharedInfo &info) {
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info.freqMem = static_cast<u32>(MeasurePtoFreqHz(ClkPtoEmc, 1) / 1000);
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info.freqCpu = static_cast<u32>(MeasurePtoFreqHz(ClkPtoCclkGDiv2, 2) / 1000);
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}
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} // namespace freq
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