diff options
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/spd_ddr2.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/include/spd_ddr2.h b/src/include/spd_ddr2.h new file mode 100644 index 0000000000..a1deb36c96 --- /dev/null +++ b/src/include/spd_ddr2.h @@ -0,0 +1,88 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007 Advanced Micro Devices, Inc. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* SPDs for DDR2 SDRAM */ +#define SPD_MEM_TYPE 2 + #define SPD_MEM_TYPE_SDRAM_DDR 0x07 + #define SPD_MEM_TYPE_SDRAM_DDR2 0x08 + +#define SPD_DIMM_TYPE 20 /* x bit0 or bit4 =1 mean registered*/ + #define SPD_DIMM_TYPE_RDIMM (1<<0) + #define SPD_DIMM_TYPE_UDIMM (1<<1) + #define SPD_DIMM_TYPE_SODIMM (1<<2) + #define SPD_DIMM_TYPE_uDIMM (1<<3) + #define SPD_DIMM_TYPE_mRDIMM (1<<4) + #define SPD_DIMM_TYPE_mUDIMM (1<<5) +#define SPD_MOD_ATTRIB 21 + #define SPD_MOD_ATTRIB_DIFCK 0x20 + #define SPD_MOD_ATTRIB_REGADC 0x11 /* x */ + #define SPD_MOD_ATTRIB_PROBE 0x40 + +#define SPD_DEV_ATTRIB 22 /* Device attributes --- general */ +#define SPD_DIMM_CONF_TYPE 11 + #define SPD_DIMM_CONF_TYPE_ECC 0x02 + #define SPD_DIMM_CONF_TYPE_ADDR_PARITY 0x04 /* ? */ + +#define SPD_ROW_NUM 3 /* Number of Row addresses */ +#define SPD_COL_NUM 4 /* Number of Column addresses */ +#define SPD_BANK_NUM 17 /* SDRAM Device attributes - Number of Banks on + SDRAM device, it could be 0x4, 0x8, so address + lines for that would be 2, and 3 */ + +/* Number of Ranks bit [2:0], Package (bit4, 1=stack, 0=planr), Height bit[7:5] */ +#define SPD_MOD_ATTRIB_RANK 5 + #define SPD_MOD_ATTRIB_RANK_NUM_SHIFT 0 + #define SPD_MOD_ATTRIB_RANK_NUM_MASK 0x07 + #define SPD_MOD_ATTRIB_RANK_NUM_BASE 1 + #define SPD_MOD_ATTRIB_RANK_NUM_MIN 1 + #define SPD_MOD_ATTRIB_RANK_NUM_MAX 8 + +#define SPD_RANK_SIZE 31 /* Only one bit is set */ + #define SPD_RANK_SIZE_1GB (1<<0) + #define SPD_RANK_SIZE_2GB (1<<1) + #define SPD_RANK_SIZE_4GB (1<<2) + #define SPD_RANK_SIZE_8GB (1<<3) + #define SPD_RANK_SIZE_16GB (1<<4) + #define SPD_RANK_SIZE_128MB (1<<5) + #define SPD_RANK_SIZE_256MB (1<<6) + #define SPD_RANK_SIZE_512MB (1<<7) + +#define SPD_DATA_WIDTH 6 /* valid value 0, 32, 33, 36, 64, 72, 80, 128, 144, 254, 255 */ +#define SPD_PRI_WIDTH 13 /* Primary SDRAM Width, it could be 0x08 or 0x10 */ +#define SPD_ERR_WIDTH 14 /* Error Checking SDRAM Width, it could be 0x08 or 0x10 */ + +#define SPD_CAS_LAT 18 /* SDRAM Device Attributes -- CAS Latency */ + #define SPD_CAS_LAT_2 (1<<2) + #define SPD_CAS_LAT_3 (1<<3) + #define SPD_CAS_LAT_4 (1<<4) + #define SPD_CAS_LAT_5 (1<<5) + #define SPD_CAS_LAT_6 (1<<6) + +#define SPD_TRP 27 /* bit [7:2] = 1-63 ns, bit [1:0] 0.25ns+, final value ((val>>2) + (val & 3) * 0.25)ns */ +#define SPD_TRRD 28 +#define SPD_TRCD 29 +#define SPD_TRAS 30 +#define SPD_TWR 36 /* x */ +#define SPD_TWTR 37 /* x */ +#define SPD_TRTP 38 /* x */ + +#define SPD_TRC 41 /* add byte 0x40 bit [3:1] , so final val41+ table[((val40>>1) & 0x7)] ... table[]={0, 0.25, 0.33, 0.5, 0.75, 0, 0}*/ +#define SPD_TRFC 42 /* add byte 0x40 bit [6:4] , so final val42+ table[((val40>>4) & 0x7)] + (val40 & 1)*256*/ + +#define SPD_TREF 12 |