| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2013 Alexandru Gagniuc <mr.nuke.me@gmail.com> |
| * |
| * 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, either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * 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, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #ifndef DEVICE_DRAM_DDR3L_H |
| #define DEVICE_DRAM_DDR3L_H |
| |
| /** |
| * @file ddr3.h |
| * |
| * \brief Utilities for decoding DDR3 SPDs |
| */ |
| |
| #include <stdint.h> |
| #include <spd.h> |
| |
| /** |
| * \brief Convenience definitions for TCK values |
| * |
| * Different values for tCK, representing standard DDR3 frequencies. |
| * These values are in 1/256 ns units. |
| * @{ |
| */ |
| #define TCK_1066MHZ 240 |
| #define TCK_800MHZ 320 |
| #define TCK_666MHZ 384 |
| #define TCK_533MHZ 480 |
| #define TCK_400MHZ 640 |
| #define TCK_333MHZ 768 |
| #define TCK_266MHZ 960 |
| #define TCK_200MHZ 1280 |
| /** @} */ |
| |
| /** |
| * \brief Convenience macro for enabling printk with CONFIG_DEBUG_RAM_SETUP |
| * |
| * Use this macro instead of printk(); for verbose RAM initialization messages. |
| * When CONFIG_DEBUG_RAM_SETUP is not selected, these messages are automatically |
| * disabled. |
| * @{ |
| */ |
| #if defined(CONFIG_DEBUG_RAM_SETUP) && (CONFIG_DEBUG_RAM_SETUP) |
| #define printram(x, ...) printk(BIOS_DEBUG, x, ##__VA_ARGS__) |
| #else |
| #define printram(x, ...) |
| #endif |
| /** @} */ |
| |
| /* |
| * Module type (byte 3, bits 3:0) of SPD |
| * This definition is specific to DDR3. DDR2 SPDs have a diferent structure. |
| */ |
| enum spd_dimm_type { |
| SPD_DIMM_TYPE_UNDEFINED = 0x00, |
| SPD_DIMM_TYPE_RDIMM = 0x01, |
| SPD_DIMM_TYPE_UDIMM = 0x02, |
| SPD_DIMM_TYPE_SO_DIMM = 0x03, |
| SPD_DIMM_TYPE_MICRO_DIMM = 0x04, |
| SPD_DIMM_TYPE_MINI_RDIMM = 0x05, |
| SPD_DIMM_TYPE_MINI_UDIMM = 0x06, |
| SPD_DIMM_TYPE_MINI_CDIMM = 0x07, |
| SPD_DIMM_TYPE_72B_SO_UDIMM = 0x08, |
| SPD_DIMM_TYPE_72B_SO_RDIMM = 0x09, |
| SPD_DIMM_TYPE_72B_SO_CDIMM = 0x0a, |
| SPD_DIMM_TYPE_LRDIMM = 0x0b, |
| SPD_DIMM_TYPE_16B_SO_DIMM = 0x0d, |
| SPD_DIMM_TYPE_32B_SO_DIMM = 0x0e, |
| /* Masks to bits 3:0 to give the dimm type */ |
| SPD_DIMM_TYPE_MASK = 0x0f, |
| }; |
| |
| /** |
| * \brief DIMM flags |
| * |
| * Characteristic flags for the DIMM, as presented by the SPD |
| */ |
| typedef union dimm_flags_st { |
| /* The whole point of the union/struct construct is to allow us to clear |
| * all the bits with one line: flags.raw = 0. |
| * We do not care how these bits are ordered */ |
| struct { |
| /* Indicates if rank 1 of DIMM uses a mirrored pin mapping. See: |
| * Annex K: Serial Presence Detect (SPD) for DDR3 SDRAM */ |
| unsigned pins_mirrored:1; |
| /* Module can work at 1.50V - All DIMMS must be 1.5V operable */ |
| unsigned operable_1_50V:1; |
| /* Module can work at 1.35V */ |
| unsigned operable_1_35V:1; |
| /* Module can work at 1.20V */ |
| unsigned operable_1_25V:1; |
| /* Has an 8-bit bus extension, meaning the DIMM supports ECC */ |
| unsigned is_ecc:1; |
| /* DLL-Off Mode Support */ |
| unsigned dll_off_mode:1; |
| /* Indicates a drive strength of RZQ/6 (40 Ohm) is supported */ |
| unsigned rzq6_supported:1; |
| /* Indicates a drive strength of RZQ/7 (35 Ohm) is supported */ |
| unsigned rzq7_supported:1; |
| /* Partial Array Self Refresh */ |
| unsigned pasr:1; |
| /* On-die Thermal Sensor Readout */ |
| unsigned odts:1; |
| /* Auto Self Refresh */ |
| unsigned asr:1; |
| /* Extended temperature range supported */ |
| unsigned ext_temp_range:1; |
| /* Operating at extended temperature requires 2X refresh rate */ |
| unsigned ext_temp_refresh:1; |
| /* Thermal sensor incorporated */ |
| unsigned therm_sensor:1; |
| }; |
| unsigned raw; |
| } dimm_flags_t; |
| |
| /** |
| * \brief DIMM characteristics |
| * |
| * The characteristics of each DIMM, as presented by the SPD |
| */ |
| typedef struct dimm_attr_st { |
| enum spd_memory_type dram_type; |
| u16 cas_supported; |
| /* Flags extracted from SPD */ |
| dimm_flags_t flags; |
| /* Number of ranks */ |
| u8 ranks; |
| /* Number or row address bits */ |
| u8 row_bits; |
| /* Number or column address bits */ |
| u8 col_bits; |
| /* Size of module in MiB */ |
| u32 size_mb; |
| /* Latencies are in units of 1/256 ns */ |
| u32 tCK; |
| u32 tAA; |
| u32 tWR; |
| u32 tRCD; |
| u32 tRRD; |
| u32 tRP; |
| u32 tRAS; |
| u32 tRC; |
| u32 tRFC; |
| u32 tWTR; |
| u32 tRTP; |
| u32 tFAW; |
| } dimm_attr; |
| |
| /** Result of the SPD decoding process */ |
| enum spd_status { |
| SPD_STATUS_OK = 0, |
| SPD_STATUS_INVALID, |
| SPD_STATUS_CRC_ERROR, |
| SPD_STATUS_INVALID_FIELD, |
| }; |
| |
| typedef u8 spd_raw_data[256]; |
| |
| int spd_decode_ddr3(dimm_attr * dimm, spd_raw_data spd_data); |
| int dimm_is_registered(enum spd_dimm_type type); |
| void dram_print_spd_ddr3(const dimm_attr * dimm); |
| |
| /** |
| * \brief Read double word from specified address |
| * |
| * Should be useful when doing an MRS to the DIMM |
| */ |
| static inline u32 volatile_read(volatile u32 addr) |
| { |
| volatile u32 result; |
| result = *(volatile u32 *)addr; |
| return result; |
| } |
| |
| #endif /* DEVICE_DRAM_DDR3_H */ |