diff options
Diffstat (limited to 'resources/libreboot/patch/coreboot/33fb4cf0ffb01be8bcb6b488872c87eb50e7d77f/grub/kgpe-d16/0087-northbridge-amd-amdmct-Reduce-maximum-number-of-DDR3.patch')
| -rw-r--r-- | resources/libreboot/patch/coreboot/33fb4cf0ffb01be8bcb6b488872c87eb50e7d77f/grub/kgpe-d16/0087-northbridge-amd-amdmct-Reduce-maximum-number-of-DDR3.patch | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/resources/libreboot/patch/coreboot/33fb4cf0ffb01be8bcb6b488872c87eb50e7d77f/grub/kgpe-d16/0087-northbridge-amd-amdmct-Reduce-maximum-number-of-DDR3.patch b/resources/libreboot/patch/coreboot/33fb4cf0ffb01be8bcb6b488872c87eb50e7d77f/grub/kgpe-d16/0087-northbridge-amd-amdmct-Reduce-maximum-number-of-DDR3.patch new file mode 100644 index 0000000..08333f6 --- /dev/null +++ b/resources/libreboot/patch/coreboot/33fb4cf0ffb01be8bcb6b488872c87eb50e7d77f/grub/kgpe-d16/0087-northbridge-amd-amdmct-Reduce-maximum-number-of-DDR3.patch @@ -0,0 +1,41 @@ +From e262fc3ee190bafb58adfab926cc24ff9cbd239c Mon Sep 17 00:00:00 2001 +From: Timothy Pearson <tpearson@raptorengineeringinc.com> +Date: Tue, 20 Oct 2015 21:32:09 -0500 +Subject: [PATCH 087/143] northbridge/amd/amdmct: Reduce maximum number of + DDR3 DIMMs + +CAR space on certain platforms is nearly full. This prevents the +addition of necessary RAM initialization features such as x4 DIMM +support. As the DIMM SPD cache uses a sizeable amount of CAR RAM, +reducing it would free up a significant amount of CAR RAM. + +DDR3-based AMD platforms only support up to 3 physical DIMMs on +each channel (6 per node). Reduce the maximum number of DIMMs +on a node from 8 to 6 accordingly. + +Change-Id: I38def86da76fc622785318c825670209b2ac9017 +Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com> +--- + src/northbridge/amd/amdmct/wrappers/mcti.h | 6 +++++- + 1 file changed, 5 insertions(+), 1 deletion(-) + +diff --git a/src/northbridge/amd/amdmct/wrappers/mcti.h b/src/northbridge/amd/amdmct/wrappers/mcti.h +index 2aba377..ef6e3dc 100644 +--- a/src/northbridge/amd/amdmct/wrappers/mcti.h ++++ b/src/northbridge/amd/amdmct/wrappers/mcti.h +@@ -51,7 +51,11 @@ UPDATE AS NEEDED + #endif + + #ifndef MAX_DIMMS_SUPPORTED +-#define MAX_DIMMS_SUPPORTED 8 ++#if IS_ENABLED(CONFIG_DIMM_DDR3) ++ #define MAX_DIMMS_SUPPORTED 6 ++#else ++ #define MAX_DIMMS_SUPPORTED 8 ++#endif + #endif + + #ifndef MAX_CS_SUPPORTED +-- +1.7.9.5 + |