Timothy Pearson (tpearson@raptorengineeringinc.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/8405
-gerrit
commit 45457eb5d0a89466b46da2e9e64b61ad510f6f43 Author: Timothy Pearson tpearson@raptorengineeringinc.com Date: Tue Feb 10 13:13:39 2015 -0600
northbridge/amd: Allow mainboards to set maximum HT link frequency
Most mainboards are designed to a maximum HT frequency specification. Coreboot supports CPUs that were released after mainboard production; these CPUs may support and autodetect HT link frequencies beyond the mainboard design capabilities. This patch allows mainboards to set an HT frequency limit if needed.
Change-Id: If7ff40dccb4c22829062511ca0046aa2caf15580 Signed-off-by: Timothy Pearson tpearson@raptorengineeringinc.com --- src/northbridge/amd/Kconfig | 80 +++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 78 insertions(+), 2 deletions(-)
diff --git a/src/northbridge/amd/Kconfig b/src/northbridge/amd/Kconfig index 17f15c3..2a178ca 100644 --- a/src/northbridge/amd/Kconfig +++ b/src/northbridge/amd/Kconfig @@ -6,13 +6,89 @@ source src/northbridge/amd/agesa/Kconfig source src/northbridge/amd/cimx/Kconfig source src/northbridge/amd/pi/Kconfig
+config FORCE_LIMIT_HT_SPEED_200 + bool + default n + +config FORCE_LIMIT_HT_SPEED_300 + bool + default n + +config FORCE_LIMIT_HT_SPEED_400 + bool + default n + +config FORCE_LIMIT_HT_SPEED_500 + bool + default n + +config FORCE_LIMIT_HT_SPEED_600 + bool + default n + +config FORCE_LIMIT_HT_SPEED_800 + bool + default n + +config FORCE_LIMIT_HT_SPEED_1000 + bool + default n + +config FORCE_LIMIT_HT_SPEED_1200 + bool + default n + +config FORCE_LIMIT_HT_SPEED_1400 + bool + default n + +config FORCE_LIMIT_HT_SPEED_1600 + bool + default n + +config FORCE_LIMIT_HT_SPEED_1800 + bool + default n + +config FORCE_LIMIT_HT_SPEED_2000 + bool + default n + +config FORCE_LIMIT_HT_SPEED_2200 + bool + default n + +config FORCE_LIMIT_HT_SPEED_2400 + bool + default n + +config FORCE_LIMIT_HT_SPEED_2600 + bool + default n + menu "HyperTransport setup" #could be implemented for K8 (NORTHBRIDGE_AMD_AMDK8) - depends on (NORTHBRIDGE_AMD_AMDFAM10) && EXPERT + depends on (NORTHBRIDGE_AMD_AMDFAM10) + # visible if EXPERT
choice prompt "HyperTransport frequency" - default LIMIT_HT_SPEED_AUTO + default LIMIT_HT_SPEED_AUTO if (!FORCE_LIMIT_HT_SPEED_200 && !FORCE_LIMIT_HT_SPEED_300 && !FORCE_LIMIT_HT_SPEED_400 && !FORCE_LIMIT_HT_SPEED_500 && !FORCE_LIMIT_HT_SPEED_600 && !FORCE_LIMIT_HT_SPEED_800 && !FORCE_LIMIT_HT_SPEED_1000 && !FORCE_LIMIT_HT_SPEED_1200 && !FORCE_LIMIT_HT_SPEED_1400 && !FORCE_LIMIT_HT_SPEED_1600 && !FORCE_LIMIT_HT_SPEED_1800 && !FORCE_LIMIT_HT_SPEED_2000 && !FORCE_LIMIT_HT_SPEED_2200 && !FORCE_LIMIT_HT_SPEED_2400 && !FORCE_LIMIT_HT_SPEED_2600) + default LIMIT_HT_SPEED_200 if FORCE_LIMIT_HT_SPEED_200 + default LIMIT_HT_SPEED_300 if FORCE_LIMIT_HT_SPEED_300 + default LIMIT_HT_SPEED_400 if FORCE_LIMIT_HT_SPEED_400 + default LIMIT_HT_SPEED_500 if FORCE_LIMIT_HT_SPEED_500 + default LIMIT_HT_SPEED_600 if FORCE_LIMIT_HT_SPEED_600 + default LIMIT_HT_SPEED_800 if FORCE_LIMIT_HT_SPEED_800 + default LIMIT_HT_SPEED_1000 if FORCE_LIMIT_HT_SPEED_1000 + default LIMIT_HT_SPEED_1200 if FORCE_LIMIT_HT_SPEED_1200 + default LIMIT_HT_SPEED_1400 if FORCE_LIMIT_HT_SPEED_1400 + default LIMIT_HT_SPEED_1600 if FORCE_LIMIT_HT_SPEED_1600 + default LIMIT_HT_SPEED_1800 if FORCE_LIMIT_HT_SPEED_1800 + default LIMIT_HT_SPEED_2000 if FORCE_LIMIT_HT_SPEED_2000 + default LIMIT_HT_SPEED_2200 if FORCE_LIMIT_HT_SPEED_2200 + default LIMIT_HT_SPEED_2400 if FORCE_LIMIT_HT_SPEED_2400 + default LIMIT_HT_SPEED_2600 if FORCE_LIMIT_HT_SPEED_2600 help This option sets the maximum permissible HyperTransport link frequency.