src/soc/intel/apollolake/meminit_util_apl.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright 2017 Google Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <cbmem.h>
#include <console/console.h>
#include <fsp/util.h>
#include <memory_info.h>
#include <soc/intel/common/smbios.h>
#include <soc/meminit.h>
#include <string.h>

#define FSP_SMBIOS_MEMORY_INFO_GUID	\
{	\
	0x8c, 0x10, 0xa1, 0x01, 0xee, 0x9d, 0x84, 0x49,	\
	0x88, 0xc3, 0xee, 0xe8, 0xc4, 0x9e, 0xfb, 0x89	\
}

void save_lpddr4_dimm_info_part_num(const char *dram_part_num)
{
	int channel, dimm, dimm_max, index;
	size_t hob_size;
	const DIMM_INFO *src_dimm;
	struct dimm_info *dest_dimm;
	struct memory_info *mem_info;
	const CHANNEL_INFO *channel_info;
	const FSP_SMBIOS_MEMORY_INFO *memory_info_hob;
	const uint8_t smbios_memory_info_guid[16] =
			FSP_SMBIOS_MEMORY_INFO_GUID;

	if (!dram_part_num)
		dram_part_num = "Unknown";

	/* Locate the memory info HOB */
	memory_info_hob = fsp_find_extension_hob_by_guid(
				smbios_memory_info_guid,
				&hob_size);

	if (memory_info_hob == NULL || hob_size == 0) {
		printk(BIOS_ERR, "SMBIOS memory info HOB is missing\n");
		return;
	}

	/*
	 * Allocate CBMEM area for DIMM information used to populate SMBIOS
	 * table 17
	 */
	mem_info = cbmem_add(CBMEM_ID_MEMINFO, sizeof(*mem_info));
	if (mem_info == NULL) {
		printk(BIOS_ERR, "CBMEM entry for DIMM info missing\n");
		return;
	}
	memset(mem_info, 0, sizeof(*mem_info));

	/* Describe the first N DIMMs in the system */
	index = 0;
	dimm_max = ARRAY_SIZE(mem_info->dimm);

	for (channel = 0; channel < memory_info_hob->ChannelCount; channel++) {
		if (index >= dimm_max)
			break;
		channel_info = &memory_info_hob->ChannelInfo[channel];
		for (dimm = 0; dimm < channel_info->DimmCount; dimm++) {
			if (index >= dimm_max)
				break;
			src_dimm = &channel_info->DimmInfo[dimm];
			dest_dimm = &mem_info->dimm[index];

			if (!src_dimm->SizeInMb)
				continue;

			/* Populate the DIMM information */
			dimm_info_fill(dest_dimm,
				src_dimm->SizeInMb,
				memory_info_hob->MemoryType,
				memory_info_hob->MemoryFrequencyInMHz,
				channel_info->ChannelId,
				src_dimm->DimmId,
				dram_part_num,
				strlen(dram_part_num),
				memory_info_hob->DataWidth);
			index++;
		}
	}
	mem_info->dimm_cnt = index;
	printk(BIOS_DEBUG, "%d DIMMs found\n", mem_info->dimm_cnt);
}

void save_lpddr4_dimm_info(const struct lpddr4_cfg *lp4cfg, size_t mem_sku)
{
	const char *part_num = NULL;

	if (mem_sku >= lp4cfg->num_skus) {
		printk(BIOS_ERR, "Too few LPDDR4 SKUs: 0x%zx/0x%zx\n",
			mem_sku, lp4cfg->num_skus);
	} else {
		part_num = lp4cfg->skus[mem_sku].part_num;
	}

	save_lpddr4_dimm_info_part_num(part_num);
}