53 lines
2.0 KiB
C
53 lines
2.0 KiB
C
/*
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* Copyright (c) 2015, 2016, The Linux Foundation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <libpayload.h>
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#define GCNT_FREQ_MHZ 48
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#define MSM_TMR_BASE ((void *)0x004a1000u)
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#define GCNT_CNTCV_LO (MSM_TMR_BASE + 0x1000)
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#define GCNT_CNTCV_HI (MSM_TMR_BASE + 0x1004)
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uint64_t timer_hz(void)
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{
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return GCNT_FREQ_MHZ * 1000 * 1000;
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}
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uint64_t timer_raw_value(void)
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{
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uint32_t hi, lo;
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do {
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hi = read32(GCNT_CNTCV_HI);
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lo = read32(GCNT_CNTCV_LO);
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} while (hi != read32(GCNT_CNTCV_HI));
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return ((((uint64_t)hi) << 32) | lo);
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}
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