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| author | Ronald G. Minnich <rminnich@gmail.com> | 2006-09-18 04:23:23 +0000 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2006-09-18 04:23:23 +0000 |
| commit | 0740c31cff42e97ab16353d38a58b4bffdbb124d (patch) | |
| tree | 54f86bf4ed8cca573780c3a19cca81d7e2f669df /src/northbridge/amd | |
| parent | 50f84bdea8648d8890e2f3be09f81514094d64f8 (diff) | |
| download | coreboot-0740c31cff42e97ab16353d38a58b4bffdbb124d.tar.xz | |
A fix for hynix dram problems seen at 366/244
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2419 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/northbridge/amd')
| -rw-r--r-- | src/northbridge/amd/gx2/raminit.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/northbridge/amd/gx2/raminit.c b/src/northbridge/amd/gx2/raminit.c index fcc05e92f4..e45d696e35 100644 --- a/src/northbridge/amd/gx2/raminit.c +++ b/src/northbridge/amd/gx2/raminit.c @@ -85,6 +85,14 @@ static void sdram_enable(int controllers, const struct mem_controller *ctrl) /* load RDSYNC */ msr = rdmsr(0x2000001f); msr.hi = 0x000ff310; + /* the above setting is supposed to be good for "slow" ram. We have found that for + * some dram, at some clock rates, e.g. hynix at 366/244, this will actually + * cause errors. The fix is to just set it to 0x310. Tested on 3 boards + * with 3 different type of dram -- Hynix, PSC, infineon. + * I am leaving this comment here so that at some future time nobody is tempted + * to mess with this setting -- RGM, 9/2006 + */ + msr.hi = 0x00000310; msr.lo = 0x00000000; wrmsr(0x2000001f, msr); |