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48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) Marvell International Ltd. and its affiliates
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*/
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#include "mv_ddr_common.h"
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#include "ddr_ml_wrapper.h"
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void mv_ddr_ver_print(void)
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{
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printf("%s %s\n", mv_ddr_version_string, mv_ddr_build_message);
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}
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/* ceiling division for positive integers */
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unsigned int ceil_div(unsigned int x, unsigned int y)
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{
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return (x % y) ? (x / y + 1) : (x / y);
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}
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/*
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* time to number of clocks calculation based on the rounding algorithm
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* using 97.4% inverse factor per JEDEC Standard No. 21-C, 4.1.2.L-4:
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* Serial Presence Detect (SPD) for DDR4 SDRAM Modules
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*/
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unsigned int time_to_nclk(unsigned int t, unsigned int tclk)
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{
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/* t & tclk parameters are in ps */
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return ((unsigned long)t * 1000 / tclk + 974) / 1000;
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}
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/* round division of two positive integers to the nearest whole number */
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int round_div(unsigned int dividend, unsigned int divisor, unsigned int *quotient)
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{
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if (quotient == NULL) {
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printf("%s: error: NULL quotient pointer found\n", __func__);
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return MV_FAIL;
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}
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if (divisor == 0) {
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printf("%s: error: division by zero\n", __func__);
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return MV_FAIL;
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} else {
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*quotient = (dividend + divisor / 2) / divisor;
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}
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return MV_OK;
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}
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