src/soc/intel/elkhartlake/meminit.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <assert.h>
   4 #include <console/console.h>
   5 #include <fsp/util.h>
   6 #include <soc/meminit.h>
   7 #include <spd_bin.h>
   8 #include <string.h>
   9
  10 static void spd_read_from_cbfs(const struct spd_info *spd_info, uintptr_t *spd_data_ptr,
  11                                 size_t *spd_data_len)
  12 {
  13         size_t spd_index = spd_info->spd_spec.spd_index;
  14
  15         printk(BIOS_DEBUG, "SPD INDEX = %zu\n", spd_index);
  16
  17         /* Memory leak is ok since we have memory mapped boot media */
  18         assert(CONFIG(BOOT_DEVICE_MEMORY_MAPPED));
  19
  20         *spd_data_len = CONFIG_DIMM_SPD_SIZE;
  21         *spd_data_ptr = spd_cbfs_map(spd_index);
  22         if (!*spd_data_ptr)
  23                 die("spd.bin not found or incorrect index\n");
  24 }
  25
  26 static void get_spd_data(const struct spd_info *spd_info, uintptr_t *spd_data_ptr,
  27                                 size_t *spd_data_len)
  28 {
  29         if (spd_info->read_type == READ_SPD_MEMPTR) {
  30                 *spd_data_ptr = spd_info->spd_spec.spd_data_ptr_info.spd_data_ptr;
  31                 *spd_data_len = spd_info->spd_spec.spd_data_ptr_info.spd_data_len;
  32                 return;
  33         }
  34
  35         if (spd_info->read_type == READ_SPD_CBFS) {
  36                 spd_read_from_cbfs(spd_info, spd_data_ptr, spd_data_len);
  37                 return;
  38         }
  39
  40         die("no valid way to read SPD info");
  41 }
  42
  43 static void meminit_dq_dqs_map(FSP_M_CONFIG *mem_cfg, const struct mb_cfg *board_cfg,
  44                                 bool half_populated)
  45 {
  46         memcpy(&mem_cfg->RcompResistor, &board_cfg->rcomp_resistor,
  47                 sizeof(mem_cfg->RcompResistor));
  48
  49         memcpy(&mem_cfg->RcompTarget, &board_cfg->rcomp_targets,
  50                 sizeof(mem_cfg->RcompTarget));
  51
  52         memcpy(&mem_cfg->DqByteMapCh0, &board_cfg->dq_map[DDR_CH0],
  53                 sizeof(board_cfg->dq_map[DDR_CH0]));
  54
  55         memcpy(&mem_cfg->DqsMapCpu2DramCh0, &board_cfg->dqs_map[DDR_CH0],
  56                 sizeof(board_cfg->dqs_map[DDR_CH0]));
  57
  58         if (half_populated)
  59                 return;
  60
  61         memcpy(&mem_cfg->DqByteMapCh1, &board_cfg->dq_map[DDR_CH1],
  62                 sizeof(board_cfg->dq_map[DDR_CH1]));
  63
  64         memcpy(&mem_cfg->DqsMapCpu2DramCh1, &board_cfg->dqs_map[DDR_CH1],
  65                 sizeof(board_cfg->dqs_map[DDR_CH1]));
  66 }
  67
  68 static void meminit_channels(FSP_M_CONFIG *mem_cfg, const struct mb_cfg *board_cfg,
  69                                 uintptr_t spd_data_ptr, bool half_populated)
  70 {
  71         /* Channel 0 */
  72         mem_cfg->MemorySpdPtr00 = spd_data_ptr;
  73         mem_cfg->MemorySpdPtr01 = 0;
  74
  75         if (half_populated) {
  76                 printk(BIOS_INFO, "%s: DRAM half-populated\n", __func__);
  77                 spd_data_ptr = 0;
  78         }
  79
  80         /* Channel 1 */
  81         mem_cfg->MemorySpdPtr10 = spd_data_ptr;
  82         mem_cfg->MemorySpdPtr11 = 0;
  83
  84         meminit_dq_dqs_map(mem_cfg, board_cfg, half_populated);
  85 }
  86
  87 /* Initialize onboard memory configurations for lpddr4x */
  88 void memcfg_init(FSP_M_CONFIG *mem_cfg, const struct mb_cfg *board_cfg,
  89                         const struct spd_info *spd_info, bool half_populated)
  90 {
  91         if (spd_info->read_type == READ_SMBUS) {
  92                 for (int i = 0; i < NUM_DIMM_SLOT; i++)
  93                         mem_cfg->SpdAddressTable[i] = spd_info->spd_spec.spd_smbus_address[i];
  94
  95                 meminit_dq_dqs_map(mem_cfg, board_cfg, half_populated);
  96         } else {
  97                 uintptr_t spd_data_ptr = 0;
  98                 size_t spd_data_len = 0;
  99                 memset(&mem_cfg->SpdAddressTable, 0, sizeof(mem_cfg->SpdAddressTable));
 100                 get_spd_data(spd_info, &spd_data_ptr, &spd_data_len);
 101                 print_spd_info((unsigned char *)spd_data_ptr);
 102
 103                 mem_cfg->MemorySpdDataLen = spd_data_len;
 104                 meminit_channels(mem_cfg, board_cfg, spd_data_ptr, half_populated);
 105         }
 106
 107         /* Early Command Training Enabled */
 108         mem_cfg->ECT = board_cfg->ect;
 109         mem_cfg->DqPinsInterleaved = board_cfg->dq_pins_interleaved;
 110         mem_cfg->CaVrefConfig = board_cfg->vref_ca_config;
 111         mem_cfg->UserBd = board_cfg->UserBd;
 112 }