- Factoring of auto.c

- Implementation of fallback/normal support for the amd solo board
- Minor bugfix in romcc


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@867 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 49 insertions, 0 deletions

diff --git a/src/northbridge/amd/amdk8/early_ht.c b/src/northbridge/amd/amdk8/early_ht.c
new file mode 100644
index 0000000000..36e5b9a39f
--- /dev/null
+++ b/src/northbridge/amd/amdk8/early_ht.c
@@ -0,0 +1,49 @@
+static void enumerate_ht_chain(void)
+{
+	/* Assumption the HT chain that is bus 0 has the HT I/O Hub on it.
+	 * On most boards this just happens.  If a cpu has multiple
+	 * non Coherent links the appropriate bus registers for the
+	 * links needs to be programed to point at bus 0.
+	 */
+	unsigned next_unitid, last_unitid;;
+	next_unitid = 1;
+	do {
+		uint32_t id;
+		uint8_t hdr_type, pos;
+		last_unitid = next_unitid;
+
+		id = pci_read_config32(PCI_ADDR(0,0,0,PCI_VENDOR_ID));
+		/* If the chain is enumerated quit */
+		if (((id & 0xffff) == 0x0000) || ((id & 0xffff) == 0xffff) ||
+			(((id >> 16) & 0xffff) == 0xffff) ||
+			(((id >> 16) & 0xffff) == 0x0000)) {
+			break;
+		}
+		hdr_type = pci_read_config8(PCI_ADDR(0,0,0,PCI_HEADER_TYPE));
+		pos = 0;
+		hdr_type &= 0x7f;
+
+		if ((hdr_type == PCI_HEADER_TYPE_NORMAL) ||
+			(hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
+			pos = pci_read_config8(PCI_ADDR(0,0,0, PCI_CAPABILITY_LIST));
+		}
+		while(pos != 0) {
+			uint8_t cap;
+			cap = pci_read_config8(PCI_ADDR(0,0,0, pos + PCI_CAP_LIST_ID));
+			if (cap == PCI_CAP_ID_HT) {
+				uint16_t flags;
+				flags = pci_read_config16(PCI_ADDR(0,0,0, pos + PCI_CAP_FLAGS));
+				if ((flags >> 13) == 0) {
+					unsigned count;
+					flags &= ~0x1f;
+					flags |= next_unitid & 0x1f;
+					count = (flags >> 5) & 0x1f;
+					pci_write_config16(PCI_ADDR(0, 0, 0, pos + PCI_CAP_FLAGS), flags);
+					next_unitid += count;
+					break;
+				}
+			}
+			pos = pci_read_config8(PCI_ADDR(0, 0, 0, pos + PCI_CAP_LIST_NEXT));
+		}
+	} while((last_unitid != next_unitid) && (next_unitid <= 0x1f));
+}