Documentation/northbridge/intel/sandybridge/nri_features.md

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