- Comment on why optimize_link_read_pointers is safe on an Athlon64

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1785 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
2004-11-15 17:01:05 +00:00 · 2004-11-15 17:01:05 +00:00 · bec8acedf1
parent cb364958a0
commit bec8acedf1
1 changed files with 1 additions and 0 deletions
--- a/src/northbridge/amd/amdk8/coherent_ht.c
+++ b/src/northbridge/amd/amdk8/coherent_ht.c
@ -606,6 +606,7 @@ static int optimize_link_read_pointers(unsigned nodes, int needs_reset)
 		for(link = 0; link < 3; link = link + 1) {
 			uint32_t link_type;
 			unsigned reg;
+			/* This works on an Athlon64 because unimplemented links return 0 */
 			reg = 0x98 + (link * 0x20);
 			link_type = pci_read_config32(f0_dev, reg);
 			if (link_type & LinkConnected) {