| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <cbfs.h> |
| #include <console/console.h> |
| #include <soc/pei_data.h> |
| #include <soc/pei_wrapper.h> |
| #include <string.h> |
| #include <types.h> |
| |
| #define SPD_DRAM_TYPE 2 |
| #define SPD_DRAM_DDR3 0x0b |
| #define SPD_DRAM_LPDDR3 0xf1 |
| #define SPD_DENSITY_BANKS 4 |
| #define SPD_ADDRESSING 5 |
| #define SPD_ORGANIZATION 7 |
| #define SPD_BUS_DEV_WIDTH 8 |
| #define SPD_PART_OFF 128 |
| #define SPD_PART_LEN 18 |
| |
| #define SPD_LEN 256 |
| |
| static 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, 0 }; |
| const int spd_rows[8] = { 12, 13, 14, 15, 16, -1, -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[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"); |
| break; |
| case SPD_DRAM_LPDDR3: |
| printk(BIOS_INFO, "LPDDR3\n"); |
| break; |
| default: |
| printk(BIOS_INFO, "Unknown (%02x)\n", spd[SPD_DRAM_TYPE]); |
| break; |
| } |
| |
| /* Module Part Number */ |
| memcpy(spd_name, &spd[SPD_PART_OFF], SPD_PART_LEN); |
| spd_name[SPD_PART_LEN] = 0; |
| 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); |
| } |
| } |
| |
| void copy_spd(struct pei_data *pei_data, struct spd_info *spdi) |
| { |
| size_t spd_file_len; |
| uint8_t *spd_file = cbfs_map("spd.bin", &spd_file_len); |
| |
| printk(BIOS_DEBUG, "SPD index %d\n", spdi->spd_index); |
| |
| if (!spd_file) |
| die("SPD data not found."); |
| |
| if (spd_file_len < SPD_LEN) |
| die("Missing SPD data."); |
| |
| if (spd_file_len < ((spdi->spd_index + 1) * SPD_LEN)) { |
| printk(BIOS_ERR, "SPD index override to 0 - old hardware?\n"); |
| spdi->spd_index = 0; |
| } |
| |
| uint8_t *const spd = spd_file + (spdi->spd_index * SPD_LEN); |
| |
| /* Make sure a valid SPD was found */ |
| if (spd[0] == 0) |
| die("Invalid SPD data."); |
| |
| print_spd_info(spd); |
| |
| for (size_t i = 0; i < ARRAY_SIZE(spdi->addresses); i++) { |
| if (spdi->addresses[i] == SPD_MEMORY_DOWN) |
| memcpy(pei_data->spd_data[i / 2][i % 2], spd, SPD_LEN); |
| } |
| } |