hob_mem.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <cbmem.h>
#include <console/console.h>
#include <string.h>
 
#include <soc/hob_mem.h>
 
#include <smbios.h>
#include <memory_info.h>
#include <soc/ramstage.h>
 
/* Save the DIMM information for SMBIOS table 17 */
void soc_save_dimm_info(void)
{
        int channel;
        const CHANNEL_INFO *channel_info;
        int dimm;
        const DIMM_INFO *dimm_info;
        int dimm_max;
        int index;
        struct memory_info *mem_info;
        const FSP_SMBIOS_MEMORY_INFO *memory_info_hob;
 
        /* Get the memory info HOB */
        memory_info_hob = soc_get_fsp_smbios_memory_info_hob();
 
        if (memory_info_hob == NULL)
                return;
 
        /* Display the data in the FSP_SMBIOS_MEMORY_INFO HOB */
        if (CONFIG(DISPLAY_HOBS))
                soc_display_fsp_smbios_memory_info_hob(memory_info_hob);
 
        /*
         * Allocate CBMEM area for DIMM information used to populate SMBIOS
         * table 17
         */
        mem_info = cbmem_add(CBMEM_ID_MEMINFO, sizeof(*mem_info));
        printk(BIOS_DEBUG, "CBMEM entry for DIMM info: %p\n", mem_info);
        if (mem_info == NULL)
                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;
                        dimm_info = &channel_info->DimmInfo[dimm];
 
                        /* Populate the DIMM information */
                        if (!dimm_info->SizeInMb)
                                continue;
 
                        mem_info->dimm[index].dimm_size =
                                dimm_info->SizeInMb;
                        mem_info->dimm[index].ddr_type =
                                memory_info_hob->MemoryType;
                        mem_info->dimm[index].ddr_frequency =
                                memory_info_hob->MemoryFrequencyInMHz;
                        mem_info->dimm[index].channel_num =
                                channel_info->ChannelId;
                        mem_info->dimm[index].dimm_num =
                                dimm_info->DimmId;
 
                        strncpy((char *)
                                mem_info->dimm[index].module_part_number,
                                (char *)dimm_info->ModulePartNum, 18);
                        mem_info->dimm[index].mod_id =
                                dimm_info->MfgId;
                        switch (memory_info_hob->DataWidth) {
                        default:
                        case 8:
                                mem_info->dimm[index].bus_width =
                                        MEMORY_BUS_WIDTH_8;
                                break;
 
                        case 16:
                                mem_info->dimm[index].bus_width =
                                        MEMORY_BUS_WIDTH_16;
                                break;
 
                        case 32:
                                mem_info->dimm[index].bus_width =
                                        MEMORY_BUS_WIDTH_32;
                                break;
 
                        case 64:
                                mem_info->dimm[index].bus_width =
                                        MEMORY_BUS_WIDTH_64;
                                break;
 
                        case 128:
                                mem_info->dimm[index].bus_width =
                                        MEMORY_BUS_WIDTH_128;
                                break;
                        }
 
                        /* Add any mainboard specific information */
                        mainboard_add_dimm_info(mem_info, channel, dimm, index);
                        index++;
                }
        }
        mem_info->dimm_cnt = index;
        printk(BIOS_DEBUG, "%d DIMMs found\n", mem_info->dimm_cnt);
}
 
/* Add any mainboard specific information */
__attribute__((weak)) void mainboard_add_dimm_info(struct memory_info *mem_info,
                                                   int channel, int dimm,
                                                   int index)
{
        printk(BIOS_DEBUG, "WEAK: %s/%s called\n", __FILE__, __func__);
}