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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 Alexandru Gagniuc <mr.nuke.me@gmail.com>
* Copyright (C) 2017 Patrick Rudolph <siro@das-labor.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef DEVICE_DRAM_COMMON_H
#define DEVICE_DRAM_COMMON_H
/**
* \brief Convenience definitions for TCK values
*
* Different values for tCK, representing standard DDR3 frequencies.
* These values are in 1/256 ns units.
* @{
*/
#define NS2MHZ_DIV256 (1000 << 8)
#define TCK_1333MHZ 192
#define TCK_1200MHZ 212
#define TCK_1100MHZ 232
#define TCK_1066MHZ 240
#define TCK_1000MHZ 256
#define TCK_933MHZ 274
#define TCK_900MHZ 284
#define TCK_800MHZ 320
#define TCK_700MHZ 365
#define TCK_666MHZ 384
#define TCK_533MHZ 480
#define TCK_400MHZ 640
#define TCK_333MHZ 768
#define TCK_266MHZ 960
#define TCK_200MHZ 1280
/** @} */
/**
* \brief Convenience macro for enabling printk with CONFIG_DEBUG_RAM_SETUP
*
* Use this macro instead of printk(); for verbose RAM initialization messages.
* When CONFIG_DEBUG_RAM_SETUP is not selected, these messages are automatically
* disabled.
* @{
*/
#if CONFIG(DEBUG_RAM_SETUP)
#define printram(x, ...) printk(BIOS_DEBUG, x, ##__VA_ARGS__)
#else
#define printram(x, ...)
#endif
/** @} */
/** Result of the SPD decoding process */
enum spd_status {
SPD_STATUS_OK = 0,
SPD_STATUS_INVALID,
SPD_STATUS_CRC_ERROR,
SPD_STATUS_INVALID_FIELD,
};
u16 ddr_crc16(const u8 *ptr, int n_crc);
#endif /* DEVICE_DRAM_COMMON_H */
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