1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) Marvell International Ltd. and its affiliates 4 */ 5 6 #include "mv_ddr_common.h" 7 #include "ddr_ml_wrapper.h" 8 9 void mv_ddr_ver_print(void) 10 { 11 printf("%s %s\n", mv_ddr_version_string, mv_ddr_build_message); 12 } 13 14 /* ceiling division for positive integers */ 15 unsigned int ceil_div(unsigned int x, unsigned int y) 16 { 17 return (x % y) ? (x / y + 1) : (x / y); 18 } 19 20 /* 21 * time to number of clocks calculation based on the rounding algorithm 22 * using 97.4% inverse factor per JEDEC Standard No. 21-C, 4.1.2.L-4: 23 * Serial Presence Detect (SPD) for DDR4 SDRAM Modules 24 */ 25 unsigned int time_to_nclk(unsigned int t, unsigned int tclk) 26 { 27 /* t & tclk parameters are in ps */ 28 return ((unsigned long)t * 1000 / tclk + 974) / 1000; 29 } 30 31 /* round division of two positive integers to the nearest whole number */ 32 int round_div(unsigned int dividend, unsigned int divisor, unsigned int *quotient) 33 { 34 if (quotient == NULL) { 35 printf("%s: error: NULL quotient pointer found\n", __func__); 36 return MV_FAIL; 37 } 38 39 if (divisor == 0) { 40 printf("%s: error: division by zero\n", __func__); 41 return MV_FAIL; 42 } else { 43 *quotient = (dividend + divisor / 2) / divisor; 44 } 45 46 return MV_OK; 47 } 48
