mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-26 21:13:48 +00:00
48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
/*
|
||
|
|
* Copyright (C) Marvell International Ltd. and its affiliates
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "mv_ddr_common.h"
|
||
|
|
#include "ddr_ml_wrapper.h"
|
||
|
|
|
||
|
|
void mv_ddr_ver_print(void)
|
||
|
|
{
|
||
|
|
printf("%s %s\n", mv_ddr_version_string, mv_ddr_build_message);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* ceiling division for positive integers */
|
||
|
|
unsigned int ceil_div(unsigned int x, unsigned int y)
|
||
|
|
{
|
||
|
|
return (x % y) ? (x / y + 1) : (x / y);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* time to number of clocks calculation based on the rounding algorithm
|
||
|
|
* using 97.4% inverse factor per JEDEC Standard No. 21-C, 4.1.2.L-4:
|
||
|
|
* Serial Presence Detect (SPD) for DDR4 SDRAM Modules
|
||
|
|
*/
|
||
|
|
unsigned int time_to_nclk(unsigned int t, unsigned int tclk)
|
||
|
|
{
|
||
|
|
/* t & tclk parameters are in ps */
|
||
|
|
return ((unsigned long)t * 1000 / tclk + 974) / 1000;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* round division of two positive integers to the nearest whole number */
|
||
|
|
int round_div(unsigned int dividend, unsigned int divisor, unsigned int *quotient)
|
||
|
|
{
|
||
|
|
if (quotient == NULL) {
|
||
|
|
printf("%s: error: NULL quotient pointer found\n", __func__);
|
||
|
|
return MV_FAIL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (divisor == 0) {
|
||
|
|
printf("%s: error: division by zero\n", __func__);
|
||
|
|
return MV_FAIL;
|
||
|
|
} else {
|
||
|
|
*quotient = (dividend + divisor / 2) / divisor;
|
||
|
|
}
|
||
|
|
|
||
|
|
return MV_OK;
|
||
|
|
}
|