Attached patch adds support for tinybootblock on VT8237* to decode whole flash

independent of strapping, making larger flashes work. We cannot walk anything
else than PCI bus 0 because HT is not setup yet.

Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Myles Watson <mylesgw@gmail.com>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5485 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 46 insertions, 0 deletions

diff --git a/src/southbridge/via/vt8237r/bootblock.c b/src/southbridge/via/vt8237r/bootblock.c
new file mode 100644
index 0000000000..0759f894bc
--- /dev/null
+++ b/src/southbridge/via/vt8237r/bootblock.c
@@ -0,0 +1,46 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2010 Rudolf Marek <r.marek@assembler.cz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#include <arch/io.h>
+#include <arch/romcc_io.h>
+#include <device/pci_ids.h>
+
+static void bootblock_southbridge_init(void)
+{
+	device_t dev;
+	/* don't walk other busses, HT is not enabled */
+
+	/* ROM decode last 8MB FF800000 - FFFFFFFF on VT8237S/VT8237A */
+	/* ROM decode last 4MB FFC00000 - FFFFFFFF on VT8237R */
+
+	/* Power management controller */
+	dev = pci_locate_device_on_bus(PCI_ID(PCI_VENDOR_ID_VIA,
+		    PCI_DEVICE_ID_VIA_VT8237R_LPC), 0);
+
+	if (dev == PCI_DEV_INVALID) {
+		/* Power management controller */
+		dev = pci_locate_device_on_bus(PCI_ID(PCI_VENDOR_ID_VIA,
+			PCI_DEVICE_ID_VIA_VT8237S_LPC), 0);
+
+		if (dev == PCI_DEV_INVALID)
+			return;
+	}
+
+	pci_write_config8(dev, 0x41, 0x7f);
+}