1 files changed, 152 insertions, 0 deletions
diff --git a/roms/u-boot/lib/binman.c b/roms/u-boot/lib/binman.c
new file mode 100644
index 000000000..530df6a4b
--- /dev/null
+++ b/roms/u-boot/lib/binman.c
@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: Intel
+/*
+ * Access to binman information at runtime
+ *
+ * Copyright 2019 Google LLC
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#include <common.h>
+#include <binman.h>
+#include <dm.h>
+#include <log.h>
+#include <malloc.h>
+#include <mapmem.h>
+
+/**
+ * struct binman_info - Information needed by the binman library
+ *
+ * @image: Node describing the image we are running from
+ * @rom_offset: Offset from an image_pos to the memory-mapped address, or
+ *	ROM_OFFSET_NONE if the ROM is not memory-mapped. Can be positive or
+ *	negative
+ */
+struct binman_info {
+	ofnode image;
+	int rom_offset;
+};
+
+#define ROM_OFFSET_NONE		(-1)
+
+static struct binman_info *binman;
+
+/**
+ * find_image_node() - Find the top-level binman node
+ *
+ * Finds the binman node which can be used to load entries. The correct node
+ * depends on whether multiple-images is in use.
+ *
+ * @nodep: Returns the node found, on success
+ * @return 0 if OK, , -EINVAL if there is no /binman node, -ECHILD if multiple
+ * images are being used but the first image is not available
+ */
+static int find_image_node(ofnode *nodep)
+{
+	ofnode node;
+
+	node = ofnode_path("/binman");
+	if (!ofnode_valid(node))
+		return log_msg_ret("binman node", -EINVAL);
+	if (ofnode_read_bool(node, "multiple-images")) {
+		node = ofnode_first_subnode(node);
+
+		if (!ofnode_valid(node))
+			return log_msg_ret("first image", -ECHILD);
+	}
+	*nodep = node;
+
+	return 0;
+}
+
+static int binman_entry_find_internal(ofnode node, const char *name,
+				      struct binman_entry *entry)
+{
+	int ret;
+
+	if (!ofnode_valid(node))
+		node = binman->image;
+	node = ofnode_find_subnode(node, name);
+	if (!ofnode_valid(node))
+		return log_msg_ret("node", -ENOENT);
+
+	ret = ofnode_read_u32(node, "image-pos", &entry->image_pos);
+	if (ret)
+		return log_msg_ret("image-pos", ret);
+	ret = ofnode_read_u32(node, "size", &entry->size);
+	if (ret)
+		return log_msg_ret("size", ret);
+
+	return 0;
+}
+
+int binman_entry_find(const char *name, struct binman_entry *entry)
+{
+	return binman_entry_find_internal(binman->image, name, entry);
+}
+
+int binman_entry_map(ofnode parent, const char *name, void **bufp, int *sizep)
+{
+	struct binman_entry entry;
+	int ret;
+
+	if (binman->rom_offset == ROM_OFFSET_NONE)
+		return -EPERM;
+	ret = binman_entry_find_internal(parent, name, &entry);
+	if (ret)
+		return log_msg_ret("entry", ret);
+	if (sizep)
+		*sizep = entry.size;
+	*bufp = map_sysmem(entry.image_pos + binman->rom_offset, entry.size);
+
+	return 0;
+}
+
+ofnode binman_section_find_node(const char *name)
+{
+	return ofnode_find_subnode(binman->image, name);
+}
+
+void binman_set_rom_offset(int rom_offset)
+{
+	binman->rom_offset = rom_offset;
+}
+
+int binman_get_rom_offset(void)
+{
+	return binman->rom_offset;
+}
+
+int binman_select_subnode(const char *name)
+{
+	ofnode node;
+	int ret;
+
+	ret = find_image_node(&node);
+	if (ret)
+		return log_msg_ret("main", -ENOENT);
+	node = ofnode_find_subnode(node, name);
+	if (!ofnode_valid(node))
+		return log_msg_ret("node", -ENOENT);
+	binman->image = node;
+	log_info("binman: Selected image subnode '%s'\n",
+		 ofnode_get_name(binman->image));
+
+	return 0;
+}
+
+int binman_init(void)
+{
+	int ret;
+
+	binman = malloc(sizeof(struct binman_info));
+	if (!binman)
+		return log_msg_ret("space for binman", -ENOMEM);
+	ret = find_image_node(&binman->image);
+	if (ret)
+		return log_msg_ret("node", -ENOENT);
+	binman_set_rom_offset(ROM_OFFSET_NONE);
+	log_debug("binman: Selected image node '%s'\n",
+		  ofnode_get_name(binman->image));
+
+	return 0;
+}