On APs the ClLinesToNbDis was being left enabled from CAR setup.

Disabling it should help performance.

Signed-off-by: Marc Jones <marc.jones@amd.com>
Acked-by: Peter Stuge <peter@stuge.se>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3262 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

diff --git a/src/cpu/amd/model_10xxx/init_cpus.c b/src/cpu/amd/model_10xxx/init_cpus.c
index 16b5a3d928b3e2036060254a804e6886d8ad6f91..2de1ad6bdbb14e51f56179403f15271f94429bb6 100644 (file)
--- a/src/cpu/amd/model_10xxx/init_cpus.c
+++ b/src/cpu/amd/model_10xxx/init_cpus.c
@@ -295,6 +295,13 @@ static void enable_apic_ext_id(u32 node)
 
 static void STOP_CAR_AND_CPU()
 {
+       msr_t msr;
+
+       /* Disable L2 IC to L3 connection (Only for CAR) */
+       msr = rdmsr(BU_CFG2);
+       msr.lo &= ~(1 << ClLinesToNbDis);
+       wrmsr(BU_CFG2, msr);
+
        disable_cache_as_ram(); // inline
        stop_this_cpu();
 }