diff options
| author | Timothy Pearson <tpearson@raptorengineeringinc.com> | 2015-08-07 19:05:45 -0500 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2015-11-20 23:54:40 +0100 |
| commit | fdf31cb9d9dab81817463512a9159f0bdb568339 (patch) | |
| tree | 0ea43821c443d7d19a959b118fba5ae37c8fa749 /src/northbridge/amd/amdht/h3ncmn.c | |
| parent | 7c55f374d1bc9e87005cea288fa1a00c48c69b54 (diff) | |
northbridge/amd/amdht: Add comment for HT Freq write ordering
The BKDG is not correct regarding HT Freq write ordering;
indicate this in a comment to avoid confusion.
Change-Id: I37db191c144c81aba5d4a1e6291db5669a35a31a
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: http://review.coreboot.org/12030
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src/northbridge/amd/amdht/h3ncmn.c')
| -rw-r--r-- | src/northbridge/amd/amdht/h3ncmn.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/northbridge/amd/amdht/h3ncmn.c b/src/northbridge/amd/amdht/h3ncmn.c index 29524afee0..c97d59293f 100644 --- a/src/northbridge/amd/amdht/h3ncmn.c +++ b/src/northbridge/amd/amdht/h3ncmn.c @@ -1555,6 +1555,10 @@ static void setLinkData(sMainData *pDat, cNorthBridge *nb) } else { temp2 = 0x0; } + /* NOTE + * The Family 15h BKDG Rev. 3.14 is wrong + * Freq[4] must be set before Freq[3:0], otherwise the register writes will be ignored! + */ if (is_gt_rev_d()) AmdPCIWriteBits(linkBase + HTHOST_FREQ_REV_REG_2, 0, 0, &temp2); AmdPCIWriteBits(linkBase + HTHOST_FREQ_REV_REG, 11, 8, &temp); |