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| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2015-02-05 15:48:38 +0200 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2015-06-05 10:17:35 +0200 |
| commit | 7748ee5ee188bf6b3846501b32a9ae82ccb8e853 (patch) | |
| tree | b795bbb255aeb0345f744fce4a41a0d433c0f01b /src/northbridge/amd/amdk8 | |
| parent | 98a915e2621df4885ba42f09502775f1f4a288b4 (diff) | |
| download | coreboot-7748ee5ee188bf6b3846501b32a9ae82ccb8e853.tar.xz | |
AMD K8 fam10: Refactor Kconfig SB_HT_CHAIN_ON_BUS0
If SB_HT_CHAIN_ON_BUS0 is selected, HyperTransport chain for System Bus
is the first to scan and it will be assigned with bus number 0.
If HT_CHAIN_DISTRIBUTE is selected, each link will reserve a fixed range
of bus numbers instead of assigning consecutive numbers across all the links.
All fam10 have SB_HT_CHAIN_ON_BUS0 selected under northbridge.
Follow-up can easily drop this if we find this is dictated by architecture.
Change-Id: I8deddcb4c3fd679b6b27e2879d9dba3895c4dd6f
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/8366
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>
Reviewed-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Diffstat (limited to 'src/northbridge/amd/amdk8')
| -rw-r--r-- | src/northbridge/amd/amdk8/Kconfig | 6 | ||||
| -rw-r--r-- | src/northbridge/amd/amdk8/northbridge.c | 4 |
2 files changed, 6 insertions, 4 deletions
diff --git a/src/northbridge/amd/amdk8/Kconfig b/src/northbridge/amd/amdk8/Kconfig index cc0cc66b12..b293ce3343 100644 --- a/src/northbridge/amd/amdk8/Kconfig +++ b/src/northbridge/amd/amdk8/Kconfig @@ -65,8 +65,10 @@ config SB_HT_CHAIN_UNITID_OFFSET_ONLY default n config SB_HT_CHAIN_ON_BUS0 - int - default 0 + def_bool y + +config HT_CHAIN_DISTRIBUTE + def_bool n config QRANK_DIMM_SUPPORT bool diff --git a/src/northbridge/amd/amdk8/northbridge.c b/src/northbridge/amd/amdk8/northbridge.c index bdfe355490..3ac626d5c5 100644 --- a/src/northbridge/amd/amdk8/northbridge.c +++ b/src/northbridge/amd/amdk8/northbridge.c @@ -179,11 +179,11 @@ static u32 amdk8_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool is_ * so we set the subordinate bus number to 0xff for the moment. */ - if ((CONFIG_SB_HT_CHAIN_ON_BUS0 == 0) || !is_sblink) + if (!CONFIG_SB_HT_CHAIN_ON_BUS0 || !is_sblink) max++; /* Second chain will be on 0x40, third 0x80, forth 0xc0. */ - if ((CONFIG_SB_HT_CHAIN_ON_BUS0 > 1) && !is_sblink) + if (CONFIG_HT_CHAIN_DISTRIBUTE && !is_sblink) max = ALIGN_UP(max, 0x40); link->secondary = max; |