romstage.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <assert.h>
#include <soc/romstage.h>
#include <stdint.h>
#include <string.h>
#include <spd_bin.h>
 
void mainboard_memory_init_params(FSPM_UPD *mupd)
{
        const u16 rcomp_resistors[3] = { 121, 75, 100 };
 
        const u16 rcomp_targets[5] = { 50, 26, 20, 20, 26 };
 
        FSP_M_CONFIG *const mem_cfg = &mupd->FspmConfig;
 
        struct spd_block blk = {
                .addr_map = { 0x50, 0x52 },
        };
 
        assert(sizeof(mem_cfg->RcompResistor) == sizeof(rcomp_resistors));
        assert(sizeof(mem_cfg->RcompTarget)   == sizeof(rcomp_targets));
 
        mem_cfg->DqPinsInterleaved = 1;
        mem_cfg->CaVrefConfig = 2;
        get_spd_smbus(&blk);
        mem_cfg->MemorySpdDataLen = blk.len;
        mem_cfg->MemorySpdPtr00 = (uintptr_t)blk.spd_array[0];
        mem_cfg->MemorySpdPtr10 = (uintptr_t)blk.spd_array[1];
        dump_spd_info(&blk);
 
        memcpy(mem_cfg->RcompResistor, rcomp_resistors, sizeof(mem_cfg->RcompResistor));
        memcpy(mem_cfg->RcompTarget,   rcomp_targets,   sizeof(mem_cfg->RcompTarget));
 
        /* use virtual channel 1 for the dmi interface of the PCH */
        mupd->FspmTestConfig.DmiVc1 = 1;
}