| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2013 Advanced Micro Devices, Inc. |
| * Copyright (C) 2013 Sage Electronic Engineering, LLC |
| * |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc. |
| */ |
| |
| #include <cbfs.h> |
| #include <console/console.h> |
| #include <device/dram/ddr3.h> |
| #include <spd_cache.h> |
| #include <stdint.h> |
| #include <string.h> |
| |
| #define SPD_SIZE 128 |
| #define SPD_CRC_HI 127 |
| #define SPD_CRC_LO 126 |
| |
| int read_spd_from_cbfs(u8 *buf, int idx) |
| { |
| const char *spd_file; |
| size_t spd_file_len = 0; |
| size_t min_len = (idx + 1) * SPD_SIZE; |
| |
| printk(BIOS_DEBUG, "read SPD\n"); |
| 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 * SPD_SIZE), SPD_SIZE); |
| |
| u16 crc = spd_ddr3_calc_crc(buf, 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 < 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; |
| } |