src/include/spd_bin.h

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2016 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #ifndef SPD_BIN_H
  17 #define SPD_BIN_H
  18
  19 #include <arch/early_variables.h>
  20 #include <stdint.h>
  21 #include <commonlib/region.h>
  22
  23 #define SPD_PAGE_LEN            256
  24 #define SPD_PAGE_LEN_DDR4       512
  25 #define SPD_PAGE_0              (0x6C >> 1)
  26 #define SPD_PAGE_1              (0x6E >> 1)
  27 #define SPD_DRAM_TYPE           2
  28 #define  SPD_DRAM_DDR3          0x0B
  29 #define  SPD_DRAM_LPDDR3_INTEL  0xF1
  30 #define  SPD_DRAM_LPDDR3_JEDEC  0x0F
  31 #define  SPD_DRAM_DDR4          0x0C
  32 #define SPD_DENSITY_BANKS       4
  33 #define SPD_ADDRESSING          5
  34 #define SPD_ORGANIZATION        7
  35 #define SPD_BUS_DEV_WIDTH       8
  36 #define DDR3_SPD_PART_OFF       128
  37 #define DDR3_SPD_PART_LEN       18
  38 #define LPDDR3_SPD_PART_OFF     128
  39 #define LPDDR3_SPD_PART_LEN     18
  40 #define DDR4_SPD_PART_OFF       329
  41 #define DDR4_SPD_PART_LEN       20
  42 #define LPDDR4_SPD_PART_OFF     329
  43 #define LPDDR4_SPD_PART_LEN     20
  44
  45 struct spd_block {
  46         u8 addr_map[CONFIG_DIMM_MAX]; /* 7 bit I2C addresses */
  47         u8 *spd_array[CONFIG_DIMM_MAX];
  48         /* Length of each dimm */
  49         u16 len;
  50 };
  51
  52 void print_spd_info(uint8_t spd[]);
  53 /* Return 0 on success & -1 on failure */
  54 int get_spd_cbfs_rdev(struct region_device *spd_rdev, u8 spd_index);
  55 void dump_spd_info(struct spd_block *blk);
  56 void get_spd_smbus(struct spd_block *blk);
  57
  58 /* expects SPD size to be 128 bytes, reads from "spd.bin" in CBFS and
  59    verifies the checksum. Only available if CONFIG_DIMM_SPD_SIZE == 128. */
  60 int read_ddr3_spd_from_cbfs(u8 *buf, int idx);
  61 #endif