1 files changed, 126 insertions, 0 deletions
diff --git a/src/vendorcode/google/chromeos/fmap.c b/src/vendorcode/google/chromeos/fmap.c
new file mode 100644
index 0000000000..0871529a75
--- /dev/null
+++ b/src/vendorcode/google/chromeos/fmap.c
@@ -0,0 +1,126 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2012 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 <stdint.h>
+#include <stddef.h>
+#include <string.h>
+#include <console/console.h>
+#include "fmap.h"
+
+static int fmap_try_find(void *fmap)
+{
+	if (!memcmp(fmap, FMAP_SIGNATURE,
+	    sizeof(FMAP_SIGNATURE)-1))
+		return 1;
+	return 0;
+}
+
+/* Find FMAP data structure in ROM.
+ * See http://code.google.com/p/flashmap/ for more information on FMAP.
+ */
+const struct fmap *fmap_find(void)
+{
+	const struct fmap *fmap = NULL;
+
+	/* FIXME: Get rid of the hard codes. The "easy" way would be to
+	 * do a binary search, but since ROM accesses are slow, we don't
+	 * want to spend a lot of time looking for the FMAP. An elegant
+	 * solution would be to store a pointer to the FMAP in the CBFS
+	 * master header; that would require some more changes to cbfstool
+	 * and possibly cros_bundle_firmware.
+	 * FIXME: Use CONFIG_ROMSIZE instead of CONFIG_MRC_CACHE_BASE
+	 * (and get rid of CONFIG_MRC_CACHE_BASE), once we are building
+	 * coreboot images with ME firmware etc built in instead of just
+	 * the CBFS part.
+	 */
+	if (fmap_try_find((void *)CONFIG_MRC_CACHE_BASE +
+						CONFIG_FLASHMAP_OFFSET))
+		fmap = (const struct fmap  *)(CONFIG_MRC_CACHE_BASE +
+						CONFIG_FLASHMAP_OFFSET);
+	if (fmap) {
+		printk(BIOS_DEBUG, "FMAP: Found \"%s\" version %d.%d at %p.\n",
+			fmap->name, fmap->ver_major, fmap->ver_minor, fmap);
+		printk(BIOS_DEBUG, "FMAP: base = %llx size = %x #areas = %d\n",
+			(unsigned long long)fmap->base, fmap->size,
+			fmap->nareas);
+	} else
+		printk(BIOS_DEBUG, "No FMAP found.\n");
+
+	return fmap;
+}
+
+const struct fmap_area *find_fmap_area(const struct fmap *fmap,
+							const char name[])
+{
+	const struct fmap_area *area = NULL;
+
+	if (fmap) {
+		int i;
+		for (i = 0; i < fmap->nareas; i++) {
+			if (!strcmp((const char *)fmap->areas[i].name, name)) {
+				area = &fmap->areas[i];
+				break;
+			}
+		}
+	}
+
+	if (area) {
+		printk(BIOS_DEBUG, "FMAP: area %s found\n", name);
+		printk(BIOS_DEBUG, "FMAP:   offset: %x\n", area->offset);
+		printk(BIOS_DEBUG, "FMAP:   size:   %d bytes\n", area->size);
+	} else {
+		printk(BIOS_DEBUG, "FMAP: area %s not found\n", name);
+	}
+
+	return area;
+}
+
+int find_fmap_entry(const char name[], void **pointer)
+{
+#ifndef __PRE_RAM__
+	static
+#endif
+	const struct fmap *fmap = NULL;
+	const struct fmap_area *area;
+	void *base = NULL;
+
+	if (!fmap)
+		fmap = fmap_find();
+
+	area = find_fmap_area(fmap, name);
+
+	if (!area)
+		return -1;
+
+	/* Right now cros_bundle_firmware does not write a valid
+	 * base address into the FMAP. Hence, if base is 0, assume
+	 * 4GB-8MB as base address.
+	 */
+	if (fmap->base) {
+		base = (void *)(unsigned long)fmap->base;
+	} else {
+		printk(BIOS_WARNING, "FMAP: No valid base address, using"
+				" 0x%08x\n", CONFIG_MRC_CACHE_BASE);
+		base = (void *)CONFIG_MRC_CACHE_BASE;
+	}
+
+	*pointer = base + area->offset;
+
+	return area->size;
+}