Add Google ChromeOS vendor support

Google's ChromeOS can be booted super fast and safely
using coreboot. This adds the ChromeOS specific code that
is required by all ChromeBooks to do this.

Change-Id: Ic03ff090a569a27acbd798ce1e5f89a34897a2f2
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/817
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

1 files changed, 88 insertions, 0 deletions

diff --git a/src/vendorcode/google/chromeos/gnvs.c b/src/vendorcode/google/chromeos/gnvs.c
new file mode 100644
index 0000000000..8d0f9bb222
--- /dev/null
+++ b/src/vendorcode/google/chromeos/gnvs.c
@@ -0,0 +1,88 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 The ChromiumOS Authors.  All rights reserved.
+ *
+ * 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 <types.h>
+#include <cbfs.h>
+#include <console/console.h>
+#include "gnvs.h"
+
+chromeos_acpi_t *vboot_data;
+static u32 me_hash_saved[8];
+
+void chromeos_init_vboot(chromeos_acpi_t *chromeos)
+{
+	vboot_data = chromeos;
+
+	/* Copy saved ME hash into NVS */
+	memcpy(vboot_data->mehh, me_hash_saved, sizeof(vboot_data->mehh));
+}
+
+void chromeos_set_vboot_data_ptr(void *blob)
+{
+	/* This code has to be rewritten to pass the vboot table
+	 * pointer through the coreboot table instead of the 
+	 * FDT, since FDT support was rejected upstream. For now
+	 * just make the code available for reference.
+	 */
+#if 0 // CONFIG_ADD_FDT
+	int node_offset, addr_cell_len;
+	const u32 *cell;
+	uintptr_t table_addr = (uintptr_t)vboot_data;
+	u32 table_addr32;
+	u64 table_addr64;
+	void *table_ptr;
+
+	cell = fdt_getprop(blob, 0, "#address-cells", NULL);
+	if (cell && *cell == 2) {
+		addr_cell_len = 8;
+		table_addr64 = cpu_to_fdt64(table_addr);
+		table_ptr = &table_addr64;
+	} else {
+		addr_cell_len = 4;
+		table_addr32 = cpu_to_fdt32(table_addr);
+		table_ptr = &table_addr32;
+	}
+
+	node_offset = fdt_path_offset(blob, "/chromeos-config");
+	if (node_offset < 0) {
+		printk(BIOS_ERR,
+			"Couldn't find /chromeos-config in the fdt.\n");
+		return;
+	}
+
+	if (fdt_setprop(blob, node_offset, "gnvs-vboot-table",
+			table_ptr, addr_cell_len) < 0) {
+		printk(BIOS_ERR, "Couldn't set gnvs-vboot-table.\n");
+	}
+#else
+	printk(BIOS_ERR, "Can't set gnvs-vboot-table.\n");
+#endif
+}
+
+void chromeos_set_me_hash(u32 *hash, int len)
+{
+	if ((len*sizeof(u32)) > sizeof(vboot_data->mehh))
+		return;
+
+	/* Copy to NVS or save until it is ready */
+	if (vboot_data)
+		memcpy(vboot_data->mehh, hash, len*sizeof(u32));
+	else
+		memcpy(me_hash_saved, hash, len*sizeof(u32));
+}