diff options
| author | Timothy Pearson <tpearson@raptorengineeringinc.com> | 2015-08-02 21:06:39 -0500 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2015-11-20 20:32:19 +0100 |
| commit | 0f1553b89a226d368f2accd443911a443b8d3a75 (patch) | |
| tree | 8b295c2951f44906fdae9ef10ec168b29ae2b43a /src/northbridge/amd/amdht | |
| parent | 5ff2502151d55349cd8d9c565d3bf5b14f91afa5 (diff) | |
nb/amd/amdfam10: Add HyperTransport probe filter support
All modern Opteron processors support the HT probe filter,
which helps to increase coherent fabric performance by
reducing the number of HT transactions per cache probe.
AMD recommends that the probe filter be enabled on all
systems with more than two nodes, and it does not hurt
to enable it on systems with 2 nodes.
Change-Id: I00a27a828260be8685ae622cfa5a4995add95a8e
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: http://review.coreboot.org/12021
Tested-by: build bot (Jenkins)
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Diffstat (limited to 'src/northbridge/amd/amdht')
| -rw-r--r-- | src/northbridge/amd/amdht/h3ncmn.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/northbridge/amd/amdht/h3ncmn.c b/src/northbridge/amd/amdht/h3ncmn.c index 01c0e48d0c..8ee929d12e 100644 --- a/src/northbridge/amd/amdht/h3ncmn.c +++ b/src/northbridge/amd/amdht/h3ncmn.c @@ -103,6 +103,28 @@ static inline uint8_t is_fam15h(void) return fam15h; } +static inline uint8_t is_gt_rev_d(void) +{ + uint8_t fam15h = 0; + uint8_t rev_gte_d = 0; + uint32_t family; + uint32_t model; + + family = model = cpuid_eax(0x80000001); + model = ((model & 0xf0000) >> 12) | ((model & 0xf0) >> 4); + family = ((family & 0xf00000) >> 16) | ((family & 0xf00) >> 8); + + if (family >= 0x6f) + /* Family 15h or later */ + fam15h = 1; + + if ((model >= 0x8) || fam15h) + /* Revision D or later */ + rev_gte_d = 1; + + return rev_gte_d; +} + /***************************************************************************//** * * SBDFO |