1 /* SPDs for DDR2 SDRAM */
3 #define SPD_MEM_TYPE_SDRAM_DDR 0x07
4 #define SPD_MEM_TYPE_SDRAM_DDR2 0x08
6 #define SPD_DIMM_TYPE 20 /* x bit0 or bit4 =1 mean registered*/
7 #define SPD_DIMM_TYPE_RDIMM (1<<0)
8 #define SPD_DIMM_TYPE_UDIMM (1<<1)
9 #define SPD_DIMM_TYPE_SODIMM (1<<2)
10 #define SPD_DIMM_TYPE_uDIMM (1<<3)
11 #define SPD_DIMM_TYPE_mRDIMM (1<<4)
12 #define SPD_DIMM_TYPE_mUDIMM (1<<5)
13 #define SPD_MOD_ATTRIB 21
14 #define SPD_MOD_ATTRIB_DIFCK 0x20
15 #define SPD_MOD_ATTRIB_REGADC 0x11 /* x */
16 #define SPD_MOD_ATTRIB_PROBE 0x40
18 #define SPD_DEV_ATTRIB 22 /* Device attributes --- general */
19 #define SPD_DIMM_CONF_TYPE 11
20 #define SPD_DIMM_CONF_TYPE_ECC 0x02
21 #define SPD_DIMM_CONF_TYPE_ADDR_PARITY 0x04 /* ? */
23 #define SPD_ROW_NUM 3 /* Number of Row addresses */
24 #define SPD_COL_NUM 4 /* Number of Column addresses */
25 #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 */
27 #define SPD_MOD_ATTRIB_RANK 5 /* include Number of Ranks bit [2:0], Package (bit4, 1=stack, 0=planr), Height bit[7:5] */
28 #define SPD_MOD_ATTRIB_RANK_NUM_SHIFT 0
29 #define SPD_MOD_ATTRIB_RANK_NUM_MASK 0x07
30 #define SPD_MOD_ATTRIB_RANK_NUM_BASE 1
31 #define SPD_MOD_ATTRIB_RANK_NUM_MIN 1
32 #define SPD_MOD_ATTRIB_RANK_NUM_MAX 8
34 #define SPD_RANK_SIZE 31 /* Only one bit is set */
35 #define SPD_RANK_SIZE_1GB (1<<0)
36 #define SPD_RANK_SIZE_2GB (1<<1)
37 #define SPD_RANK_SIZE_4GB (1<<2)
38 #define SPD_RANK_SIZE_8GB (1<<3)
39 #define SPD_RANK_SIZE_16GB (1<<4)
40 #define SPD_RANK_SIZE_128MB (1<<5)
41 #define SPD_RANK_SIZE_256MB (1<<6)
42 #define SPD_RANK_SIZE_512MB (1<<7)
44 #define SPD_DATA_WIDTH 6 /* valid value 0, 32, 33, 36, 64, 72, 80, 128, 144, 254, 255 */
45 #define SPD_PRI_WIDTH 13 /* Primary SDRAM Width, it could be 0x08 or 0x10 */
46 #define SPD_ERR_WIDTH 14 /* Error Checking SDRAM Width, it could be 0x08 or 0x10 */
48 #define SPD_CAS_LAT 18 /* SDRAM Device Attributes -- CAS Latency */
49 #define SPD_CAS_LAT_2 (1<<2)
50 #define SPD_CAS_LAT_3 (1<<3)
51 #define SPD_CAS_LAT_4 (1<<4)
52 #define SPD_CAS_LAT_5 (1<<5)
53 #define SPD_CAS_LAT_6 (1<<6)
55 #define SPD_TRP 27 /* bit [7:2] = 1-63 ns, bit [1:0] 0.25ns+, final value ((val>>2) + (val & 3) * 0.25)ns */
59 #define SPD_TWR 36 /* x */
60 #define SPD_TWTR 37 /* x */
61 #define SPD_TRTP 38 /* x */
63 #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}*/
64 #define SPD_TRFC 42 /* add byte 0x40 bit [6:4] , so final val42+ table[((val40>>4) & 0x7)] + (val40 & 1)*256*/