From 4c0e9e8c79e1ca510b224b0aad85df79d2eb32dc Mon Sep 17 00:00:00 2001
From: Stephan Uphoff <ups@FreeBSD.org>
Date: Sat, 18 Mar 2006 19:32:46 +0000
Subject: [PATCH] Enable global pages TLB extension on Application Processors.

MFC after:	3 days
---
 sys/amd64/amd64/mp_machdep.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sys/amd64/amd64/mp_machdep.c b/sys/amd64/amd64/mp_machdep.c
index d843a2391b19..7577b621a7aa 100644
--- a/sys/amd64/amd64/mp_machdep.c
+++ b/sys/amd64/amd64/mp_machdep.c
@@ -561,6 +561,13 @@ init_secondary(void)
 		smp_active = 1;	 /* historic */
 	}
 
+	/*
+	 * Enable global pages TLB extension
+	 * This also implicitly flushes the TLB 
+	 */
+
+	load_cr4(rcr4() | CR4_PGE);
+
 	mtx_unlock_spin(&ap_boot_mtx);
 
 	/* wait until all the AP's are up */