src/include/device/dram/common.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #ifndef DEVICE_DRAM_COMMON_H
   4 #define DEVICE_DRAM_COMMON_H
   5
   6 #include <console/console.h>
   7 #include <stdint.h>
   8
   9 /**
  10  * \brief Convenience definitions for TCK values
  11  *
  12  * Different values for tCK, representing standard DDR3 frequencies.
  13  * These values are in 1/256 ns units.
  14  * @{
  15  */
  16 #define NS2MHZ_DIV256   (1000 << 8)
  17
  18 #define TCK_1333MHZ     192
  19 #define TCK_1200MHZ     212
  20 #define TCK_1100MHZ     232
  21 #define TCK_1066MHZ     240
  22 #define TCK_1000MHZ     256
  23 #define TCK_933MHZ      274
  24 #define TCK_900MHZ      284
  25 #define TCK_800MHZ      320
  26 #define TCK_700MHZ      365
  27 #define TCK_666MHZ      384
  28 #define TCK_533MHZ      480
  29 #define TCK_400MHZ      640
  30 #define TCK_333MHZ      768
  31 #define TCK_266MHZ      960
  32 #define TCK_200MHZ      1280
  33 /** @} */
  34
  35 /**
  36  * \brief Convenience macro for enabling printk with CONFIG(DEBUG_RAM_SETUP)
  37  *
  38  * Use this macro instead of printk(); for verbose RAM initialization messages.
  39  * When CONFIG(DEBUG_RAM_SETUP) is not selected, these messages are automatically
  40  * disabled.
  41  * @{
  42  */
  43 #define printram(x, ...)                                                \
  44         do {                                                            \
  45                 if (CONFIG(DEBUG_RAM_SETUP))                            \
  46                         printk(BIOS_DEBUG, x, ##__VA_ARGS__);           \
  47         } while (0)
  48 /** @} */
  49
  50 /** Result of the SPD decoding process */
  51 enum spd_status {
  52         SPD_STATUS_OK = 0,
  53         SPD_STATUS_INVALID,
  54         SPD_STATUS_CRC_ERROR,
  55         SPD_STATUS_INVALID_FIELD,
  56 };
  57
  58 u16 ddr_crc16(const u8 *ptr, int n_crc);
  59
  60 #endif /* DEVICE_DRAM_COMMON_H */