| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| #include <device/dram/common.h> |
| #include <types.h> |
| |
| /** |
| * \brief Calculate the CRC of a DDR SPD data |
| * |
| * @param spd pointer to raw SPD data |
| * @param len length of data in SPD |
| * |
| * @return the CRC of the SPD data |
| */ |
| u16 ddr_crc16(const u8 *ptr, int n_crc) |
| { |
| int i; |
| u16 crc = 0; |
| |
| while (--n_crc >= 0) { |
| crc = crc ^ ((int)*ptr++ << 8); |
| for (i = 0; i < 8; ++i) |
| if (crc & 0x8000) |
| crc = (crc << 1) ^ 0x1021; |
| else |
| crc = crc << 1; |
| } |
| |
| return crc; |
| } |