diff options
Diffstat (limited to 'src/soc/intel/elkhartlake/meminit.c')
| -rw-r--r-- | src/soc/intel/elkhartlake/meminit.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/soc/intel/elkhartlake/meminit.c b/src/soc/intel/elkhartlake/meminit.c new file mode 100644 index 0000000000..cd777ba3a0 --- /dev/null +++ b/src/soc/intel/elkhartlake/meminit.c @@ -0,0 +1,114 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <assert.h> +#include <console/console.h> +#include <fsp/util.h> +#include <soc/meminit.h> +#include <spd_bin.h> +#include <string.h> + +static void spd_read_from_cbfs(const struct spd_info *spd_info, uintptr_t *spd_data_ptr, + size_t *spd_data_len) +{ + struct region_device spd_rdev; + size_t spd_index = spd_info->spd_spec.spd_index; + + printk(BIOS_DEBUG, "SPD INDEX = %lu\n", spd_index); + if (get_spd_cbfs_rdev(&spd_rdev, spd_index) < 0) + die("spd.bin not found or incorrect index\n"); + + *spd_data_len = region_device_sz(&spd_rdev); + + /* Memory leak is ok since we have memory mapped boot media */ + assert(CONFIG(BOOT_DEVICE_MEMORY_MAPPED)); + + *spd_data_ptr = (uintptr_t)rdev_mmap_full(&spd_rdev); +} + +static void get_spd_data(const struct spd_info *spd_info, uintptr_t *spd_data_ptr, + size_t *spd_data_len) +{ + if (spd_info->read_type == READ_SPD_MEMPTR) { + *spd_data_ptr = spd_info->spd_spec.spd_data_ptr_info.spd_data_ptr; + *spd_data_len = spd_info->spd_spec.spd_data_ptr_info.spd_data_len; + return; + } + + if (spd_info->read_type == READ_SPD_CBFS) { + spd_read_from_cbfs(spd_info, spd_data_ptr, spd_data_len); + return; + } + + die("no valid way to read SPD info"); +} + +static void meminit_dq_dqs_map(FSP_M_CONFIG *mem_cfg, const struct mb_cfg *board_cfg, + bool half_populated) +{ + memcpy(&mem_cfg->RcompResistor, &board_cfg->rcomp_resistor, + sizeof(mem_cfg->RcompResistor)); + + memcpy(&mem_cfg->RcompTarget, &board_cfg->rcomp_targets, + sizeof(mem_cfg->RcompTarget)); + + memcpy(&mem_cfg->DqByteMapCh0, &board_cfg->dq_map[DDR_CH0], + sizeof(board_cfg->dq_map[DDR_CH0])); + + memcpy(&mem_cfg->DqsMapCpu2DramCh0, &board_cfg->dqs_map[DDR_CH0], + sizeof(board_cfg->dqs_map[DDR_CH0])); + + if (half_populated) + return; + + memcpy(&mem_cfg->DqByteMapCh1, &board_cfg->dq_map[DDR_CH1], + sizeof(board_cfg->dq_map[DDR_CH1])); + + memcpy(&mem_cfg->DqsMapCpu2DramCh1, &board_cfg->dqs_map[DDR_CH1], + sizeof(board_cfg->dqs_map[DDR_CH1])); +} + +static void meminit_channels(FSP_M_CONFIG *mem_cfg, const struct mb_cfg *board_cfg, + uintptr_t spd_data_ptr, bool half_populated) +{ + /* Channel 0 */ + mem_cfg->MemorySpdPtr00 = spd_data_ptr; + mem_cfg->MemorySpdPtr01 = 0; + + if (half_populated) { + printk(BIOS_INFO, "%s: DRAM half-populated\n", __func__); + spd_data_ptr = 0; + } + + /* Channel 1 */ + mem_cfg->MemorySpdPtr10 = spd_data_ptr; + mem_cfg->MemorySpdPtr11 = 0; + + meminit_dq_dqs_map(mem_cfg, board_cfg, half_populated); +} + +/* Initialize onboard memory configurations for lpddr4x */ +void memcfg_init(FSP_M_CONFIG *mem_cfg, const struct mb_cfg *board_cfg, + const struct spd_info *spd_info, bool half_populated) +{ + + if (spd_info->read_type == READ_SMBUS) { + for (int i = 0; i < NUM_DIMM_SLOT; i++) + mem_cfg->SpdAddressTable[i] = spd_info->spd_spec.spd_smbus_address[i]; + + meminit_dq_dqs_map(mem_cfg, board_cfg, half_populated); + } else { + uintptr_t spd_data_ptr = 0; + size_t spd_data_len = 0; + memset(&mem_cfg->SpdAddressTable, 0, sizeof(mem_cfg->SpdAddressTable)); + get_spd_data(spd_info, &spd_data_ptr, &spd_data_len); + print_spd_info((unsigned char *)spd_data_ptr); + + mem_cfg->MemorySpdDataLen = spd_data_len; + meminit_channels(mem_cfg, board_cfg, spd_data_ptr, half_populated); + } + + /* Early Command Training Enabled */ + mem_cfg->ECT = board_cfg->ect; + + mem_cfg->UserBd = board_cfg->UserBd; +} |