2 * This file is part of the coreboot project.
4 * Copyright (C) 2007 Advanced Micro Devices, Inc.
5 * Copyright (C) 2007-2009 coresystems GmbH
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 /* SPDs for DDR2 SDRAM */
22 #define SPD_MEM_TYPE 2
23 #define SPD_MEM_TYPE_SDRAM_DDR 0x07
24 #define SPD_MEM_TYPE_SDRAM_DDR2 0x08
26 #define SPD_DIMM_TYPE 20 /* x bit0 or bit4 =1 mean registered*/
27 #define SPD_DIMM_TYPE_RDIMM (1<<0)
28 #define SPD_DIMM_TYPE_UDIMM (1<<1)
29 #define SPD_DIMM_TYPE_SODIMM (1<<2)
30 #define SPD_DIMM_TYPE_uDIMM (1<<3)
31 #define SPD_DIMM_TYPE_mRDIMM (1<<4)
32 #define SPD_DIMM_TYPE_mUDIMM (1<<5)
34 #define SPD_MOD_ATTRIB 21
35 #define SPD_MOD_ATTRIB_DIFCK 0x20
36 #define SPD_MOD_ATTRIB_REGADC 0x11 /* x */
37 #define SPD_MOD_ATTRIB_PROBE 0x40
39 #define SPD_DEV_ATTRIB 22 /* Device attributes --- general */
40 #define SPD_DIMM_CONF_TYPE 11
41 #define SPD_DIMM_CONF_TYPE_ECC 0x02
42 #define SPD_DIMM_CONF_TYPE_ADDR_PARITY 0x04 /* ? */
44 #define SPD_CAS_LAT_MIN_X_1 23
45 #define SPD_CAS_LAT_MAX_X_1 24
46 #define SPD_CAS_LAT_MIN_X_2 25
47 #define SPD_CAS_LAT_MAX_X_2 26
49 #define SPD_BURST_LENGTHS 16
50 #define SPD_BURST_LENGTHS_4 (1<<2)
51 #define SPD_BURST_LENGTHS_8 (1<<3)
53 #define SPD_ROW_NUM 3 /* Number of Row addresses */
54 #define SPD_COL_NUM 4 /* Number of Column addresses */
55 #define SPD_BANK_NUM 17 /* SDRAM Device attributes - Number of Banks on
56 SDRAM device, it could be 0x4, 0x8, so address
57 lines for that would be 2, and 3 */
59 /* Number of Ranks bit [2:0], Package (bit4, 1=stack, 0=planr), Height bit[7:5] */
60 #define SPD_MOD_ATTRIB_RANK 5
61 #define SPD_MOD_ATTRIB_RANK_NUM_SHIFT 0
62 #define SPD_MOD_ATTRIB_RANK_NUM_MASK 0x07
63 #define SPD_MOD_ATTRIB_RANK_NUM_BASE 1
64 #define SPD_MOD_ATTRIB_RANK_NUM_MIN 1
65 #define SPD_MOD_ATTRIB_RANK_NUM_MAX 8
67 #define SPD_RANK_SIZE 31 /* Only one bit is set */
68 #define SPD_RANK_SIZE_1GB (1<<0)
69 #define SPD_RANK_SIZE_2GB (1<<1)
70 #define SPD_RANK_SIZE_4GB (1<<2)
71 #define SPD_RANK_SIZE_8GB (1<<3)
72 #define SPD_RANK_SIZE_16GB (1<<4)
73 #define SPD_RANK_SIZE_128MB (1<<5)
74 #define SPD_RANK_SIZE_256MB (1<<6)
75 #define SPD_RANK_SIZE_512MB (1<<7)
77 #define SPD_DATA_WIDTH 6 /* valid value 0, 32, 33, 36, 64, 72, 80, 128, 144, 254, 255 */
78 #define SPD_PRI_WIDTH 13 /* Primary SDRAM Width, it could be 0x08 or 0x10 */
79 #define SPD_ERR_WIDTH 14 /* Error Checking SDRAM Width, it could be 0x08 or 0x10 */
81 #define SPD_CAS_LAT 18 /* SDRAM Device Attributes -- CAS Latency */
82 #define SPD_CAS_LAT_2 (1<<2)
83 #define SPD_CAS_LAT_3 (1<<3)
84 #define SPD_CAS_LAT_4 (1<<4)
85 #define SPD_CAS_LAT_5 (1<<5)
86 #define SPD_CAS_LAT_6 (1<<6)
88 #define SPD_TRP 27 /* bit [7:2] = 1-63 ns, bit [1:0] 0.25ns+, final value ((val>>2) + (val & 3) * 0.25)ns */
92 #define SPD_TWR 36 /* x */
93 #define SPD_TWTR 37 /* x */
94 #define SPD_TRTP 38 /* x */
96 #define SPD_EX_TRC_TRFC 40
97 #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}*/
98 #define SPD_TRFC 42 /* add byte 0x40 bit [6:4] , so final val42+ table[((val40>>4) & 0x7)] + (val40 & 1)*256*/