/* * This file is part of the coreboot project. * * Copyright (C) 2016 Intel Corporation. * * 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 #include #include #include #include #include #include static u8 spd_data[CONFIG_DIMM_MAX * CONFIG_DIMM_SPD_SIZE] CAR_GLOBAL; void dump_spd_info(struct spd_block *blk) { u8 i; for (i = 0; i < CONFIG_DIMM_MAX; i++) if (blk->spd_array[i] != NULL && blk->spd_array[i][0] != 0) { printk(BIOS_DEBUG, "SPD @ 0x%02X\n", blk->addr_map[i]); print_spd_info(blk->spd_array[i]); } } void print_spd_info(uint8_t spd[]) { const int spd_banks[8] = { 8, 16, 32, 64, -1, -1, -1, -1 }; const int spd_capmb[8] = { 1, 2, 4, 8, 16, 32, 64, 128 }; const int spd_rows[8] = {12, 13, 14, 15, 16, 17, -1, -1 }; const int spd_cols[8] = { 9, 10, 11, 12, -1, -1, -1, -1 }; const int spd_ranks[8] = { 1, 2, 3, 4, -1, -1, -1, -1 }; const int spd_devw[8] = { 4, 8, 16, 32, -1, -1, -1, -1 }; const int spd_busw[8] = { 8, 16, 32, 64, -1, -1, -1, -1 }; char spd_name[DDR4_SPD_PART_LEN+1] = { 0 }; int banks = spd_banks[(spd[SPD_DENSITY_BANKS] >> 4) & 7]; int capmb = spd_capmb[spd[SPD_DENSITY_BANKS] & 7] * 256; int rows = spd_rows[(spd[SPD_ADDRESSING] >> 3) & 7]; int cols = spd_cols[spd[SPD_ADDRESSING] & 7]; int ranks = spd_ranks[(spd[SPD_ORGANIZATION] >> 3) & 7]; int devw = spd_devw[spd[SPD_ORGANIZATION] & 7]; int busw = spd_busw[spd[SPD_BUS_DEV_WIDTH] & 7]; /* Module type */ printk(BIOS_INFO, "SPD: module type is "); switch (spd[SPD_DRAM_TYPE]) { case SPD_DRAM_DDR3: printk(BIOS_INFO, "DDR3\n"); /* Module Part Number */ memcpy(spd_name, &spd[DDR3_SPD_PART_OFF], DDR3_SPD_PART_LEN); spd_name[DDR3_SPD_PART_LEN] = 0; break; case SPD_DRAM_LPDDR3_INTEL: case SPD_DRAM_LPDDR3_JEDEC: printk(BIOS_INFO, "LPDDR3\n"); /* Module Part Number */ memcpy(spd_name, &spd[LPDDR3_SPD_PART_OFF], LPDDR3_SPD_PART_LEN); spd_name[LPDDR3_SPD_PART_LEN] = 0; break; case SPD_DRAM_DDR4: printk(BIOS_INFO, "DDR4\n"); memcpy(spd_name, &spd[DDR4_SPD_PART_OFF], DDR4_SPD_PART_LEN); spd_name[DDR4_SPD_PART_LEN] = 0; ranks = (spd[SPD_ORGANIZATION] >> 3) & 7; devw = spd_devw[spd[12] & 7]; busw = spd_busw[spd[13] & 7]; break; default: printk(BIOS_INFO, "Unknown (%02x)\n", spd[SPD_DRAM_TYPE]); break; } printk(BIOS_INFO, "SPD: module part is %s\n", spd_name); printk(BIOS_INFO, "SPD: banks %d, ranks %d, rows %d, columns %d, density %d Mb\n", banks, ranks, rows, cols, capmb); printk(BIOS_INFO, "SPD: device width %d bits, bus width %d bits\n", devw, busw); if (capmb > 0 && busw > 0 && devw > 0 && ranks > 0) { /* SIZE = DENSITY / 8 * BUS_WIDTH / SDRAM_WIDTH * RANKS */ printk(BIOS_INFO, "SPD: module size is %u MB (per channel)\n", capmb / 8 * busw / devw * ranks); } } static void update_spd_len(struct spd_block *blk) { u8 i, j = 0; for (i = 0 ; i < CONFIG_DIMM_MAX; i++) if (blk->spd_array[i] != NULL) j |= blk->spd_array[i][SPD_DRAM_TYPE]; /* If spd used is DDR4, then its length is 512 byte. */ if (j == SPD_DRAM_DDR4) blk->len = SPD_PAGE_LEN_DDR4; else blk->len = SPD_PAGE_LEN; } int get_spd_cbfs_rdev(struct region_device *spd_rdev, u8 spd_index) { struct cbfsf fh; uint32_t cbfs_type = CBFS_TYPE_SPD; if (cbfs_boot_locate(&fh, "spd.bin", &cbfs_type) < 0) return -1; cbfs_file_data(spd_rdev, &fh); return rdev_chain(spd_rdev, spd_rdev, spd_index * CONFIG_DIMM_SPD_SIZE, CONFIG_DIMM_SPD_SIZE); } static void smbus_read_spd(u8 *spd, u8 addr) { u16 i; u8 step = 1; if (IS_ENABLED(CONFIG_SPD_READ_BY_WORD)) step = sizeof(uint16_t); for (i = 0; i < SPD_PAGE_LEN; i += step) { if (IS_ENABLED(CONFIG_SPD_READ_BY_WORD)) ((u16*)spd)[i / sizeof(uint16_t)] = smbus_read_word(0, addr, i); else spd[i] = smbus_read_byte(0, addr, i); } } static void get_spd(u8 *spd, u8 addr) { if (smbus_read_byte(0, addr, 0) == 0xff) { printk(BIOS_INFO, "No memory dimm at address %02X\n", addr << 1); /* Make sure spd is zeroed if dimm doesn't exist. */ memset(spd, 0, CONFIG_DIMM_SPD_SIZE); return; } smbus_read_spd(spd, addr); /* Check if module is DDR4, DDR4 spd is 512 byte. */ if (spd[SPD_DRAM_TYPE] == SPD_DRAM_DDR4 && CONFIG_DIMM_SPD_SIZE > SPD_PAGE_LEN) { /* Switch to page 1 */ smbus_write_byte(0, SPD_PAGE_1, 0, 0); smbus_read_spd(spd + SPD_PAGE_LEN, addr); /* Restore to page 0 */ smbus_write_byte(0, SPD_PAGE_0, 0, 0); } } void get_spd_smbus(struct spd_block *blk) { u8 i; unsigned char *spd_data_ptr = car_get_var_ptr(&spd_data); for (i = 0 ; i < CONFIG_DIMM_MAX; i++) { get_spd(spd_data_ptr + i * CONFIG_DIMM_SPD_SIZE, blk->addr_map[i]); blk->spd_array[i] = spd_data_ptr + i * CONFIG_DIMM_SPD_SIZE; } update_spd_len(blk); } #if CONFIG_DIMM_SPD_SIZE == 128 int read_ddr3_spd_from_cbfs(u8 *buf, int idx) { const int SPD_CRC_HI = 127; const int SPD_CRC_LO = 126; const char *spd_file; size_t spd_file_len = 0; size_t min_len = (idx + 1) * CONFIG_DIMM_SPD_SIZE; spd_file = cbfs_boot_map_with_leak("spd.bin", CBFS_TYPE_SPD, &spd_file_len); if (!spd_file) printk(BIOS_EMERG, "file [spd.bin] not found in CBFS"); if (spd_file_len < min_len) printk(BIOS_EMERG, "Missing SPD data."); if (!spd_file || spd_file_len < min_len) return -1; memcpy(buf, spd_file + (idx * CONFIG_DIMM_SPD_SIZE), CONFIG_DIMM_SPD_SIZE); u16 crc = spd_ddr3_calc_crc(buf, CONFIG_DIMM_SPD_SIZE); if (((buf[SPD_CRC_LO] == 0) && (buf[SPD_CRC_HI] == 0)) || (buf[SPD_CRC_LO] != (crc & 0xff)) || (buf[SPD_CRC_HI] != (crc >> 8))) { printk(BIOS_WARNING, "SPD CRC %02x%02x is invalid, should be %04x\n", buf[SPD_CRC_HI], buf[SPD_CRC_LO], crc); buf[SPD_CRC_LO] = crc & 0xff; buf[SPD_CRC_HI] = crc >> 8; u16 i; printk(BIOS_WARNING, "\nDisplay the SPD"); for (i = 0; i < CONFIG_DIMM_SPD_SIZE; i++) { if ((i % 16) == 0x00) printk(BIOS_WARNING, "\n%02x: ", i); printk(BIOS_WARNING, "%02x ", buf[i]); } printk(BIOS_WARNING, "\n"); } return 0; } #endif