blob: 386738b260bfc51d3c7f4136fe7ef17c9a45055e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
# RAM initialization feature matrix
## Options
1. Native raminit
* Open Source
* Native Raminit is working for most frequencies on most boards.
* There might be errors to fix.
* Position in romstage doesn't matter.
2. mrc.bin raminit
* Closed Source (aka blob)
* No known errors.
* Needs to be placed at fixed offset in romstage.
## Native raminit implemented features
```{eval-rst}
+---------------------------+----------------------+-------------+---------+---------------------+
| Option | Supported | Implemented | Working | Comments |
+===========================+======================+=============+=========+=====================+
| **Supported channels** |
+---------------------------+----------------------+-------------+---------+---------------------+
| single and dual channel | yes | yes | yes | |
+---------------------------+----------------------+-------------+---------+---------------------+
| Up to 4 slots | yes | yes | yes | |
+---------------------------+----------------------+-------------+---------+---------------------+
| Up to 4 ranks per channel | yes | yes | yes | |
+---------------------------+----------------------+-------------+---------+---------------------+
| **Supported frequencies** |
+---------------------------+----------------------+-------------+---------+---------------------+
| DDR3-1066 (533MHz) | yes | yes | yes | |
+---------------------------+----------------------+-------------+---------+---------------------+
| DDR3-1600 (800MHz) | yes | yes | yes | |
+---------------------------+----------------------+-------------+---------+---------------------+
| DDR3-1866 (933MHz) | yes | yes | yes | |
+---------------------------+----------------------+-------------+---------+---------------------+
| DDR3-2133 (1066MHz) | yes | yes | yes | |
+---------------------------+----------------------+-------------+---------+---------------------+
| DDR3-1400 (700MHz) | yes (IvyBridge only) | yes | yes | Since coreboot 4.6 |
+---------------------------+----------------------+-------------+---------+---------------------+
| DDR3-1800 (900MHz) | yes (IvyBridge only) | yes | yes | Since coreboot 4.6 |
+---------------------------+----------------------+-------------+---------+---------------------+
| DDR3-2000 (1000MHz) | yes (IvyBridge only) | yes | yes | Since coreboot 4.6 |
+---------------------------+----------------------+-------------+---------+---------------------+
| DDR3-2200 (1100MHz) | yes (IvyBridge only) | yes | yes | Since coreboot 4.6 |
+---------------------------+----------------------+-------------+---------+---------------------+
| DDR3-2400 (1200MHz) | yes (IvyBridge only) | yes | yes | Since coreboot 4.6 |
+---------------------------+----------------------+-------------+---------+---------------------+
| DDR3-1800 (900MHz) | yes (IvyBridge only) | yes | yes | Since coreboot 4.6 |
+---------------------------+----------------------+-------------+---------+---------------------+
| **Supported CAS latencies** |
+---------------------------+----------------------+-------------+---------+---------------------+
| CL6 | yes | yes | ? | |
+---------------------------+----------------------+-------------+---------+---------------------+
| CL7 | yes | yes | ? | |
+---------------------------+----------------------+-------------+---------+---------------------+
| CL8 | yes | yes | ? | |
+---------------------------+----------------------+-------------+---------+---------------------+
| CL9 | yes | yes | ? | |
+---------------------------+----------------------+-------------+---------+---------------------+
| CL10 | yes | yes | yes | |
+---------------------------+----------------------+-------------+---------+---------------------+
| CL11 | yes | yes | yes | |
+---------------------------+----------------------+-------------+---------+---------------------+
| CL12 | yes | yes | ? | Since coreboot 4.6 |
+---------------------------+----------------------+-------------+---------+---------------------+
| CL13 | yes | yes | yes | Since coreboot 4.6 |
+---------------------------+----------------------+-------------+---------+---------------------+
| CL14 | yes | yes | ? | Since coreboot 4.6 |
+---------------------------+----------------------+-------------+---------+---------------------+
| CL15 | yes | yes | ? | Since coreboot 4.6 |
+---------------------------+----------------------+-------------+---------+---------------------+
| **MRC cache (stored timings of last training)** |
+---------------------------+----------------------+-------------+---------+---------------------+
| S3 | yes | yes | yes | |
+---------------------------+----------------------+-------------+---------+---------------------+
| normal boot | yes | yes | yes | reset on CRC16 diff |
+---------------------------+----------------------+-------------+---------+---------------------+
| **XMP support** |
+---------------------------+----------------------+-------------+---------+---------------------+
| XMP Profile 1 | yes | yes | yes | only 1.5 V profiles |
+---------------------------+----------------------+-------------+---------+---------------------+
| XMP Profile 2 | yes | yes | no | not activated |
+---------------------------+----------------------+-------------+---------+---------------------+
| **ECC support** |
+---------------------------+----------------------+-------------+---------+---------------------+
| ECC | yes | yes | yes | Since coreboot 4.13 |
+---------------------------+----------------------+-------------+---------+---------------------+
```
|
