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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#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;
}
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