common.h

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/* SPDX-License-Identifier: GPL-2.0-or-later */
 
#ifndef DEVICE_DRAM_COMMON_H
#define DEVICE_DRAM_COMMON_H
 
#include <console/console.h>
#include <stdint.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 */