diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
new file mode 100644
index 0000000..0c13156
--- /dev/null
+++ b/scripts/kconfig/menu.c
@@ -0,0 +1,390 @@
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#define LKC_DIRECT_LINK
+#include "lkc.h"
+
+struct menu rootmenu;
+static struct menu **last_entry_ptr;
+
+struct file *file_list;
+struct file *current_file;
+
+static void menu_warn(struct menu *menu, const char *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+	fprintf(stderr, "%s:%d:warning: ", menu->file->name, menu->lineno);
+	vfprintf(stderr, fmt, ap);
+	fprintf(stderr, "\n");
+	va_end(ap);
+}
+
+static void prop_warn(struct property *prop, const char *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+	fprintf(stderr, "%s:%d:warning: ", prop->file->name, prop->lineno);
+	vfprintf(stderr, fmt, ap);
+	fprintf(stderr, "\n");
+	va_end(ap);
+}
+
+void menu_init(void)
+{
+	current_entry = current_menu = &rootmenu;
+	last_entry_ptr = &rootmenu.list;
+}
+
+void menu_add_entry(struct symbol *sym)
+{
+	struct menu *menu;
+
+	menu = malloc(sizeof(*menu));
+	memset(menu, 0, sizeof(*menu));
+	menu->sym = sym;
+	menu->parent = current_menu;
+	menu->file = current_file;
+	menu->lineno = zconf_lineno();
+
+	*last_entry_ptr = menu;
+	last_entry_ptr = &menu->next;
+	current_entry = menu;
+}
+
+void menu_end_entry(void)
+{
+}
+
+void menu_add_menu(void)
+{
+	current_menu = current_entry;
+	last_entry_ptr = &current_entry->list;
+}
+
+void menu_end_menu(void)
+{
+	last_entry_ptr = &current_menu->next;
+	current_menu = current_menu->parent;
+}
+
+struct expr *menu_check_dep(struct expr *e)
+{
+	if (!e)
+		return e;
+
+	switch (e->type) {
+	case E_NOT:
+		e->left.expr = menu_check_dep(e->left.expr);
+		break;
+	case E_OR:
+	case E_AND:
+		e->left.expr = menu_check_dep(e->left.expr);
+		e->right.expr = menu_check_dep(e->right.expr);
+		break;
+	case E_SYMBOL:
+		/* change 'm' into 'm' && MODULES */
+		if (e->left.sym == &symbol_mod)
+			return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
+		break;
+	default:
+		break;
+	}
+	return e;
+}
+
+void menu_add_dep(struct expr *dep)
+{
+	current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
+}
+
+void menu_set_type(int type)
+{
+	struct symbol *sym = current_entry->sym;
+
+	if (sym->type == type)
+		return;
+	if (sym->type == S_UNKNOWN) {
+		sym->type = type;
+		return;
+	}
+	menu_warn(current_entry, "type of '%s' redefined from '%s' to '%s'\n",
+	    sym->name ? sym->name : "<choice>",
+	    sym_type_name(sym->type), sym_type_name(type));
+}
+
+struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
+{
+	struct property *prop = prop_alloc(type, current_entry->sym);
+
+	prop->menu = current_entry;
+	prop->text = prompt;
+	prop->expr = expr;
+	prop->visible.expr = menu_check_dep(dep);
+
+	if (prompt) {
+		if (current_entry->prompt)
+			menu_warn(current_entry, "prompt redefined\n");
+		current_entry->prompt = prop;
+	}
+
+	return prop;
+}
+
+void menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
+{
+	menu_add_prop(type, prompt, NULL, dep);
+}
+
+void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
+{
+	menu_add_prop(type, NULL, expr, dep);
+}
+
+void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
+{
+	menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
+}
+
+void sym_check_prop(struct symbol *sym)
+{
+	struct property *prop;
+	struct symbol *sym2;
+	for (prop = sym->prop; prop; prop = prop->next) {
+		switch (prop->type) {
+		case P_DEFAULT:
+			if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
+			    prop->expr->type != E_SYMBOL)
+				prop_warn(prop,
+				    "default for config symbol '%'"
+				    " must be a single symbol", sym->name);
+			break;
+		case P_SELECT:
+			sym2 = prop_get_symbol(prop);
+			if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
+				prop_warn(prop,
+				    "config symbol '%s' uses select, but is "
+				    "not boolean or tristate", sym->name);
+			else if (sym2->type == S_UNKNOWN)
+				prop_warn(prop,
+				    "'select' used by config symbol '%s' "
+				    "refer to undefined symbol '%s'",
+				    sym->name, sym2->name);
+			else if (sym2->type != S_BOOLEAN && sym2->type != S_TRISTATE)
+				prop_warn(prop,
+				    "'%s' has wrong type. 'select' only "
+				    "accept arguments of boolean and "
+				    "tristate type", sym2->name);
+			break;
+		case P_RANGE:
+			if (sym->type != S_INT && sym->type != S_HEX)
+				prop_warn(prop, "range is only allowed "
+				                "for int or hex symbols");
+			if (!sym_string_valid(sym, prop->expr->left.sym->name) ||
+			    !sym_string_valid(sym, prop->expr->right.sym->name))
+				prop_warn(prop, "range is invalid");
+			break;
+		default:
+			;
+		}
+	}
+}
+
+void menu_finalize(struct menu *parent)
+{
+	struct menu *menu, *last_menu;
+	struct symbol *sym;
+	struct property *prop;
+	struct expr *parentdep, *basedep, *dep, *dep2, **ep;
+
+	sym = parent->sym;
+	if (parent->list) {
+		if (sym && sym_is_choice(sym)) {
+			/* find the first choice value and find out choice type */
+			for (menu = parent->list; menu; menu = menu->next) {
+				if (menu->sym) {
+					current_entry = parent;
+					menu_set_type(menu->sym->type);
+					current_entry = menu;
+					menu_set_type(sym->type);
+					break;
+				}
+			}
+			parentdep = expr_alloc_symbol(sym);
+		} else if (parent->prompt)
+			parentdep = parent->prompt->visible.expr;
+		else
+			parentdep = parent->dep;
+
+		for (menu = parent->list; menu; menu = menu->next) {
+			basedep = expr_transform(menu->dep);
+			basedep = expr_alloc_and(expr_copy(parentdep), basedep);
+			basedep = expr_eliminate_dups(basedep);
+			menu->dep = basedep;
+			if (menu->sym)
+				prop = menu->sym->prop;
+			else
+				prop = menu->prompt;
+			for (; prop; prop = prop->next) {
+				if (prop->menu != menu)
+					continue;
+				dep = expr_transform(prop->visible.expr);
+				dep = expr_alloc_and(expr_copy(basedep), dep);
+				dep = expr_eliminate_dups(dep);
+				if (menu->sym && menu->sym->type != S_TRISTATE)
+					dep = expr_trans_bool(dep);
+				prop->visible.expr = dep;
+				if (prop->type == P_SELECT) {
+					struct symbol *es = prop_get_symbol(prop);
+					es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
+							expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
+				}
+			}
+		}
+		for (menu = parent->list; menu; menu = menu->next)
+			menu_finalize(menu);
+	} else if (sym) {
+		basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
+		basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
+		basedep = expr_eliminate_dups(expr_transform(basedep));
+		last_menu = NULL;
+		for (menu = parent->next; menu; menu = menu->next) {
+			dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
+			if (!expr_contains_symbol(dep, sym))
+				break;
+			if (expr_depends_symbol(dep, sym))
+				goto next;
+			dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
+			dep = expr_eliminate_dups(expr_transform(dep));
+			dep2 = expr_copy(basedep);
+			expr_eliminate_eq(&dep, &dep2);
+			expr_free(dep);
+			if (!expr_is_yes(dep2)) {
+				expr_free(dep2);
+				break;
+			}
+			expr_free(dep2);
+		next:
+			menu_finalize(menu);
+			menu->parent = parent;
+			last_menu = menu;
+		}
+		if (last_menu) {
+			parent->list = parent->next;
+			parent->next = last_menu->next;
+			last_menu->next = NULL;
+		}
+	}
+	for (menu = parent->list; menu; menu = menu->next) {
+		if (sym && sym_is_choice(sym) && menu->sym) {
+			menu->sym->flags |= SYMBOL_CHOICEVAL;
+			if (!menu->prompt)
+				menu_warn(menu, "choice value must have a prompt");
+			for (prop = menu->sym->prop; prop; prop = prop->next) {
+				if (prop->type == P_PROMPT && prop->menu != menu) {
+					prop_warn(prop, "choice values "
+					    "currently only support a "
+					    "single prompt");
+				}
+				if (prop->type == P_DEFAULT)
+					prop_warn(prop, "defaults for choice "
+					    "values not supported");
+			}
+			current_entry = menu;
+			menu_set_type(sym->type);
+			menu_add_symbol(P_CHOICE, sym, NULL);
+			prop = sym_get_choice_prop(sym);
+			for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
+				;
+			*ep = expr_alloc_one(E_CHOICE, NULL);
+			(*ep)->right.sym = menu->sym;
+		}
+		if (menu->list && (!menu->prompt || !menu->prompt->text)) {
+			for (last_menu = menu->list; ; last_menu = last_menu->next) {
+				last_menu->parent = parent;
+				if (!last_menu->next)
+					break;
+			}
+			last_menu->next = menu->next;
+			menu->next = menu->list;
+			menu->list = NULL;
+		}
+	}
+
+	if (sym && !(sym->flags & SYMBOL_WARNED)) {
+		if (sym->type == S_UNKNOWN)
+			menu_warn(parent, "config symbol defined "
+			    "without type\n");
+
+		if (sym_is_choice(sym) && !parent->prompt)
+			menu_warn(parent, "choice must have a prompt\n");
+
+		/* Check properties connected to this symbol */
+		sym_check_prop(sym);
+		sym->flags |= SYMBOL_WARNED;
+	}
+
+	if (sym && !sym_is_optional(sym) && parent->prompt) {
+		sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
+				expr_alloc_and(parent->prompt->visible.expr,
+					expr_alloc_symbol(&symbol_mod)));
+	}
+}
+
+bool menu_is_visible(struct menu *menu)
+{
+	struct menu *child;
+	struct symbol *sym;
+	tristate visible;
+
+	if (!menu->prompt)
+		return false;
+	sym = menu->sym;
+	if (sym) {
+		sym_calc_value(sym);
+		visible = menu->prompt->visible.tri;
+	} else
+		visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
+
+	if (visible != no)
+		return true;
+	if (!sym || sym_get_tristate_value(menu->sym) == no)
+		return false;
+
+	for (child = menu->list; child; child = child->next)
+		if (menu_is_visible(child))
+			return true;
+	return false;
+}
+
+const char *menu_get_prompt(struct menu *menu)
+{
+	if (menu->prompt)
+		return menu->prompt->text;
+	else if (menu->sym)
+		return menu->sym->name;
+	return NULL;
+}
+
+struct menu *menu_get_root_menu(struct menu *menu)
+{
+	return &rootmenu;
+}
+
+struct menu *menu_get_parent_menu(struct menu *menu)
+{
+	enum prop_type type;
+
+	for (; menu != &rootmenu; menu = menu->parent) {
+		type = menu->prompt ? menu->prompt->type : 0;
+		if (type == P_MENU)
+			break;
+	}
+	return menu;
+}
+