1 files changed, 750 insertions, 0 deletions

diff --git a/arch/powerpc/boot/dtc-src/checks.c b/arch/powerpc/boot/dtc-src/checks.c
new file mode 100644
index 0000000..2ce961c
--- /dev/null
+++ b/arch/powerpc/boot/dtc-src/checks.c
@@ -0,0 +1,750 @@
+/*
+ * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2007.
+ *
+ *
+ * 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; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307
+ *                                                                   USA
+ */
+
+#include "dtc.h"
+
+#ifdef TRACE_CHECKS
+#define TRACE(c, ...) \
+	do { \
+		fprintf(stderr, "=== %s: ", (c)->name); \
+		fprintf(stderr, __VA_ARGS__); \
+		fprintf(stderr, "\n"); \
+	} while (0)
+#else
+#define TRACE(c, fmt, ...)	do { } while (0)
+#endif
+
+enum checklevel {
+	IGNORE = 0,
+	WARN = 1,
+	ERROR = 2,
+};
+
+enum checkstatus {
+	UNCHECKED = 0,
+	PREREQ,
+	PASSED,
+	FAILED,
+};
+
+struct check;
+
+typedef void (*tree_check_fn)(struct check *c, struct node *dt);
+typedef void (*node_check_fn)(struct check *c, struct node *dt, struct node *node);
+typedef void (*prop_check_fn)(struct check *c, struct node *dt,
+			      struct node *node, struct property *prop);
+
+struct check {
+	const char *name;
+	tree_check_fn tree_fn;
+	node_check_fn node_fn;
+	prop_check_fn prop_fn;
+	void *data;
+	enum checklevel level;
+	enum checkstatus status;
+	int inprogress;
+	int num_prereqs;
+	struct check **prereq;
+};
+
+#define CHECK(nm, tfn, nfn, pfn, d, lvl, ...) \
+	static struct check *nm##_prereqs[] = { __VA_ARGS__ }; \
+	static struct check nm = { \
+		.name = #nm, \
+		.tree_fn = (tfn), \
+		.node_fn = (nfn), \
+		.prop_fn = (pfn), \
+		.data = (d), \
+		.level = (lvl), \
+		.status = UNCHECKED, \
+		.num_prereqs = ARRAY_SIZE(nm##_prereqs), \
+		.prereq = nm##_prereqs, \
+	};
+
+#define TREE_CHECK(nm, d, lvl, ...) \
+	CHECK(nm, check_##nm, NULL, NULL, d, lvl, __VA_ARGS__)
+#define NODE_CHECK(nm, d, lvl, ...) \
+	CHECK(nm, NULL, check_##nm, NULL, d, lvl, __VA_ARGS__)
+#define PROP_CHECK(nm, d, lvl, ...) \
+	CHECK(nm, NULL, NULL, check_##nm, d, lvl, __VA_ARGS__)
+#define BATCH_CHECK(nm, lvl, ...) \
+	CHECK(nm, NULL, NULL, NULL, NULL, lvl, __VA_ARGS__)
+
+#ifdef __GNUC__
+static inline void check_msg(struct check *c, const char *fmt, ...) __attribute__((format (printf, 2, 3)));
+#endif
+static inline void check_msg(struct check *c, const char *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+
+	if ((c->level < WARN) || (c->level <= quiet))
+		return; /* Suppress message */
+
+	fprintf(stderr, "%s (%s): ",
+		(c->level == ERROR) ? "ERROR" : "Warning", c->name);
+	vfprintf(stderr, fmt, ap);
+	fprintf(stderr, "\n");
+}
+
+#define FAIL(c, ...) \
+	do { \
+		TRACE((c), "\t\tFAILED at %s:%d", __FILE__, __LINE__); \
+		(c)->status = FAILED; \
+		check_msg((c), __VA_ARGS__); \
+	} while (0)
+
+static void check_nodes_props(struct check *c, struct node *dt, struct node *node)
+{
+	struct node *child;
+	struct property *prop;
+
+	TRACE(c, "%s", node->fullpath);
+	if (c->node_fn)
+		c->node_fn(c, dt, node);
+
+	if (c->prop_fn)
+		for_each_property(node, prop) {
+			TRACE(c, "%s\t'%s'", node->fullpath, prop->name);
+			c->prop_fn(c, dt, node, prop);
+		}
+
+	for_each_child(node, child)
+		check_nodes_props(c, dt, child);
+}
+
+static int run_check(struct check *c, struct node *dt)
+{
+	int error = 0;
+	int i;
+
+	assert(!c->inprogress);
+
+	if (c->status != UNCHECKED)
+		goto out;
+
+	c->inprogress = 1;
+
+	for (i = 0; i < c->num_prereqs; i++) {
+		struct check *prq = c->prereq[i];
+		error |= run_check(prq, dt);
+		if (prq->status != PASSED) {
+			c->status = PREREQ;
+			check_msg(c, "Failed prerequisite '%s'",
+				  c->prereq[i]->name);
+		}
+	}
+
+	if (c->status != UNCHECKED)
+		goto out;
+
+	if (c->node_fn || c->prop_fn)
+		check_nodes_props(c, dt, dt);
+
+	if (c->tree_fn)
+		c->tree_fn(c, dt);
+	if (c->status == UNCHECKED)
+		c->status = PASSED;
+
+	TRACE(c, "\tCompleted, status %d", c->status);
+
+out:
+	c->inprogress = 0;
+	if ((c->status != PASSED) && (c->level == ERROR))
+		error = 1;
+	return error;
+}
+
+/*
+ * Utility check functions
+ */
+
+static void check_is_string(struct check *c, struct node *root,
+			    struct node *node)
+{
+	struct property *prop;
+	char *propname = c->data;
+
+	prop = get_property(node, propname);
+	if (!prop)
+		return; /* Not present, assumed ok */
+
+	if (!data_is_one_string(prop->val))
+		FAIL(c, "\"%s\" property in %s is not a string",
+		     propname, node->fullpath);
+}
+#define CHECK_IS_STRING(nm, propname, lvl) \
+	CHECK(nm, NULL, check_is_string, NULL, (propname), (lvl))
+
+static void check_is_cell(struct check *c, struct node *root,
+			  struct node *node)
+{
+	struct property *prop;
+	char *propname = c->data;
+
+	prop = get_property(node, propname);
+	if (!prop)
+		return; /* Not present, assumed ok */
+
+	if (prop->val.len != sizeof(cell_t))
+		FAIL(c, "\"%s\" property in %s is not a single cell",
+		     propname, node->fullpath);
+}
+#define CHECK_IS_CELL(nm, propname, lvl) \
+	CHECK(nm, NULL, check_is_cell, NULL, (propname), (lvl))
+
+/*
+ * Structural check functions
+ */
+
+static void check_duplicate_node_names(struct check *c, struct node *dt,
+				       struct node *node)
+{
+	struct node *child, *child2;
+
+	for_each_child(node, child)
+		for (child2 = child->next_sibling;
+		     child2;
+		     child2 = child2->next_sibling)
+			if (streq(child->name, child2->name))
+				FAIL(c, "Duplicate node name %s",
+				     child->fullpath);
+}
+NODE_CHECK(duplicate_node_names, NULL, ERROR);
+
+static void check_duplicate_property_names(struct check *c, struct node *dt,
+					   struct node *node)
+{
+	struct property *prop, *prop2;
+
+	for_each_property(node, prop)
+		for (prop2 = prop->next; prop2; prop2 = prop2->next)
+			if (streq(prop->name, prop2->name))
+				FAIL(c, "Duplicate property name %s in %s",
+				     prop->name, node->fullpath);
+}
+NODE_CHECK(duplicate_property_names, NULL, ERROR);
+
+static void check_explicit_phandles(struct check *c, struct node *root,
+					  struct node *node)
+{
+	struct property *prop;
+	struct node *other;
+	cell_t phandle;
+
+	prop = get_property(node, "linux,phandle");
+	if (! prop)
+		return; /* No phandle, that's fine */
+
+	if (prop->val.len != sizeof(cell_t)) {
+		FAIL(c, "%s has bad length (%d) linux,phandle property",
+		     node->fullpath, prop->val.len);
+		return;
+	}
+
+	phandle = propval_cell(prop);
+	if ((phandle == 0) || (phandle == -1)) {
+		FAIL(c, "%s has invalid linux,phandle value 0x%x",
+		     node->fullpath, phandle);
+		return;
+	}
+
+	other = get_node_by_phandle(root, phandle);
+	if (other) {
+		FAIL(c, "%s has duplicated phandle 0x%x (seen before at %s)",
+		     node->fullpath, phandle, other->fullpath);
+		return;
+	}
+
+	node->phandle = phandle;
+}
+NODE_CHECK(explicit_phandles, NULL, ERROR);
+
+static void check_name_properties(struct check *c, struct node *root,
+				  struct node *node)
+{
+	struct property *prop;
+
+	prop = get_property(node, "name");
+	if (!prop)
+		return; /* No name property, that's fine */
+
+	if ((prop->val.len != node->basenamelen+1)
+	    || (memcmp(prop->val.val, node->name, node->basenamelen) != 0))
+		FAIL(c, "\"name\" property in %s is incorrect (\"%s\" instead"
+		     " of base node name)", node->fullpath, prop->val.val);
+}
+CHECK_IS_STRING(name_is_string, "name", ERROR);
+NODE_CHECK(name_properties, NULL, ERROR, &name_is_string);
+
+/*
+ * Reference fixup functions
+ */
+
+static void fixup_phandle_references(struct check *c, struct node *dt,
+				     struct node *node, struct property *prop)
+{
+      struct marker *m = prop->val.markers;
+      struct node *refnode;
+      cell_t phandle;
+
+      for_each_marker_of_type(m, REF_PHANDLE) {
+	      assert(m->offset + sizeof(cell_t) <= prop->val.len);
+
+	      refnode = get_node_by_ref(dt, m->ref);
+	      if (! refnode) {
+		      FAIL(c, "Reference to non-existent node or label \"%s\"\n",
+			   m->ref);
+		      continue;
+	      }
+
+	      phandle = get_node_phandle(dt, refnode);
+	      *((cell_t *)(prop->val.val + m->offset)) = cpu_to_be32(phandle);
+      }
+}
+CHECK(phandle_references, NULL, NULL, fixup_phandle_references, NULL, ERROR,
+      &duplicate_node_names, &explicit_phandles);
+
+static void fixup_path_references(struct check *c, struct node *dt,
+				  struct node *node, struct property *prop)
+{
+	struct marker *m = prop->val.markers;
+	struct node *refnode;
+	char *path;
+
+	for_each_marker_of_type(m, REF_PATH) {
+		assert(m->offset <= prop->val.len);
+
+		refnode = get_node_by_ref(dt, m->ref);
+		if (!refnode) {
+			FAIL(c, "Reference to non-existent node or label \"%s\"\n",
+			     m->ref);
+			continue;
+		}
+
+		path = refnode->fullpath;
+		prop->val = data_insert_at_marker(prop->val, m, path,
+						  strlen(path) + 1);
+	}
+}
+CHECK(path_references, NULL, NULL, fixup_path_references, NULL, ERROR,
+      &duplicate_node_names);
+
+/*
+ * Semantic checks
+ */
+CHECK_IS_CELL(address_cells_is_cell, "#address-cells", WARN);
+CHECK_IS_CELL(size_cells_is_cell, "#size-cells", WARN);
+CHECK_IS_CELL(interrupt_cells_is_cell, "#interrupt-cells", WARN);
+
+CHECK_IS_STRING(device_type_is_string, "device_type", WARN);
+CHECK_IS_STRING(model_is_string, "model", WARN);
+CHECK_IS_STRING(status_is_string, "status", WARN);
+
+static void fixup_addr_size_cells(struct check *c, struct node *dt,
+				  struct node *node)
+{
+	struct property *prop;
+
+	node->addr_cells = -1;
+	node->size_cells = -1;
+
+	prop = get_property(node, "#address-cells");
+	if (prop)
+		node->addr_cells = propval_cell(prop);
+
+	prop = get_property(node, "#size-cells");
+	if (prop)
+		node->size_cells = propval_cell(prop);
+}
+CHECK(addr_size_cells, NULL, fixup_addr_size_cells, NULL, NULL, WARN,
+      &address_cells_is_cell, &size_cells_is_cell);
+
+#define node_addr_cells(n) \
+	(((n)->addr_cells == -1) ? 2 : (n)->addr_cells)
+#define node_size_cells(n) \
+	(((n)->size_cells == -1) ? 1 : (n)->size_cells)
+
+static void check_reg_format(struct check *c, struct node *dt,
+			     struct node *node)
+{
+	struct property *prop;
+	int addr_cells, size_cells, entrylen;
+
+	prop = get_property(node, "reg");
+	if (!prop)
+		return; /* No "reg", that's fine */
+
+	if (!node->parent) {
+		FAIL(c, "Root node has a \"reg\" property");
+		return;
+	}
+
+	if (prop->val.len == 0)
+		FAIL(c, "\"reg\" property in %s is empty", node->fullpath);
+
+	addr_cells = node_addr_cells(node->parent);
+	size_cells = node_size_cells(node->parent);
+	entrylen = (addr_cells + size_cells) * sizeof(cell_t);
+
+	if ((prop->val.len % entrylen) != 0)
+		FAIL(c, "\"reg\" property in %s has invalid length (%d bytes) "
+		     "(#address-cells == %d, #size-cells == %d)",
+		     node->fullpath, prop->val.len, addr_cells, size_cells);
+}
+NODE_CHECK(reg_format, NULL, WARN, &addr_size_cells);
+
+static void check_ranges_format(struct check *c, struct node *dt,
+				struct node *node)
+{
+	struct property *prop;
+	int c_addr_cells, p_addr_cells, c_size_cells, p_size_cells, entrylen;
+
+	prop = get_property(node, "ranges");
+	if (!prop)
+		return;
+
+	if (!node->parent) {
+		FAIL(c, "Root node has a \"ranges\" property");
+		return;
+	}
+
+	p_addr_cells = node_addr_cells(node->parent);
+	p_size_cells = node_size_cells(node->parent);
+	c_addr_cells = node_addr_cells(node);
+	c_size_cells = node_size_cells(node);
+	entrylen = (p_addr_cells + c_addr_cells + c_size_cells) * sizeof(cell_t);
+
+	if (prop->val.len == 0) {
+		if (p_addr_cells != c_addr_cells)
+			FAIL(c, "%s has empty \"ranges\" property but its "
+			     "#address-cells (%d) differs from %s (%d)",
+			     node->fullpath, c_addr_cells, node->parent->fullpath,
+			     p_addr_cells);
+		if (p_size_cells != c_size_cells)
+			FAIL(c, "%s has empty \"ranges\" property but its "
+			     "#size-cells (%d) differs from %s (%d)",
+			     node->fullpath, c_size_cells, node->parent->fullpath,
+			     p_size_cells);
+	} else if ((prop->val.len % entrylen) != 0) {
+		FAIL(c, "\"ranges\" property in %s has invalid length (%d bytes) "
+		     "(parent #address-cells == %d, child #address-cells == %d, "
+		     "#size-cells == %d)", node->fullpath, prop->val.len,
+		     p_addr_cells, c_addr_cells, c_size_cells);
+	}
+}
+NODE_CHECK(ranges_format, NULL, WARN, &addr_size_cells);
+
+/*
+ * Style checks
+ */
+static void check_avoid_default_addr_size(struct check *c, struct node *dt,
+					  struct node *node)
+{
+	struct property *reg, *ranges;
+
+	if (!node->parent)
+		return; /* Ignore root node */
+
+	reg = get_property(node, "reg");
+	ranges = get_property(node, "ranges");
+
+	if (!reg && !ranges)
+		return;
+
+	if ((node->parent->addr_cells == -1))
+		FAIL(c, "Relying on default #address-cells value for %s",
+		     node->fullpath);
+
+	if ((node->parent->size_cells == -1))
+		FAIL(c, "Relying on default #size-cells value for %s",
+		     node->fullpath);
+}
+NODE_CHECK(avoid_default_addr_size, NULL, WARN, &addr_size_cells);
+
+static void check_obsolete_chosen_interrupt_controller(struct check *c,
+						       struct node *dt)
+{
+	struct node *chosen;
+	struct property *prop;
+
+	chosen = get_node_by_path(dt, "/chosen");
+	if (!chosen)
+		return;
+
+	prop = get_property(chosen, "interrupt-controller");
+	if (prop)
+		FAIL(c, "/chosen has obsolete \"interrupt-controller\" "
+		     "property");
+}
+TREE_CHECK(obsolete_chosen_interrupt_controller, NULL, WARN);
+
+static struct check *check_table[] = {
+	&duplicate_node_names, &duplicate_property_names,
+	&name_is_string, &name_properties,
+	&explicit_phandles,
+	&phandle_references, &path_references,
+
+	&address_cells_is_cell, &size_cells_is_cell, &interrupt_cells_is_cell,
+	&device_type_is_string, &model_is_string, &status_is_string,
+
+	&addr_size_cells, &reg_format, &ranges_format,
+
+	&avoid_default_addr_size,
+	&obsolete_chosen_interrupt_controller,
+};
+
+int check_semantics(struct node *dt, int outversion, int boot_cpuid_phys);
+
+void process_checks(int force, struct boot_info *bi,
+		    int checkflag, int outversion, int boot_cpuid_phys)
+{
+	struct node *dt = bi->dt;
+	int i;
+	int error = 0;
+
+	for (i = 0; i < ARRAY_SIZE(check_table); i++) {
+		struct check *c = check_table[i];
+
+		if (c->level != IGNORE)
+			error = error || run_check(c, dt);
+	}
+
+	if (error) {
+		if (!force) {
+			fprintf(stderr, "ERROR: Input tree has errors, aborting "
+				"(use -f to force output)\n");
+			exit(2);
+		} else if (quiet < 3) {
+			fprintf(stderr, "Warning: Input tree has errors, "
+				"output forced\n");
+		}
+	}
+
+	if (checkflag) {
+		if (error) {
+			fprintf(stderr, "Warning: Skipping semantic checks due to structural errors\n");
+		} else {
+			if (!check_semantics(bi->dt, outversion,
+					     boot_cpuid_phys))
+				fprintf(stderr, "Warning: Input tree has semantic errors\n");
+		}
+	}
+}
+
+/*
+ * Semantic check functions
+ */
+
+#define ERRMSG(...) if (quiet < 2) fprintf(stderr, "ERROR: " __VA_ARGS__)
+#define WARNMSG(...) if (quiet < 1) fprintf(stderr, "Warning: " __VA_ARGS__)
+
+#define DO_ERR(...) do {ERRMSG(__VA_ARGS__); ok = 0; } while (0)
+
+#define CHECK_HAVE(node, propname) \
+	do { \
+		if (! (prop = get_property((node), (propname)))) \
+			DO_ERR("Missing \"%s\" property in %s\n", (propname), \
+				(node)->fullpath); \
+	} while (0);
+
+#define CHECK_HAVE_WARN(node, propname) \
+	do { \
+		if (! (prop  = get_property((node), (propname)))) \
+			WARNMSG("%s has no \"%s\" property\n", \
+				(node)->fullpath, (propname)); \
+	} while (0)
+
+#define CHECK_HAVE_STRING(node, propname) \
+	do { \
+		CHECK_HAVE((node), (propname)); \
+		if (prop && !data_is_one_string(prop->val)) \
+			DO_ERR("\"%s\" property in %s is not a string\n", \
+				(propname), (node)->fullpath); \
+	} while (0)
+
+#define CHECK_HAVE_STREQ(node, propname, value) \
+	do { \
+		CHECK_HAVE_STRING((node), (propname)); \
+		if (prop && !streq(prop->val.val, (value))) \
+			DO_ERR("%s has wrong %s, %s (should be %s\n", \
+				(node)->fullpath, (propname), \
+				prop->val.val, (value)); \
+	} while (0)
+
+#define CHECK_HAVE_ONECELL(node, propname) \
+	do { \
+		CHECK_HAVE((node), (propname)); \
+		if (prop && (prop->val.len != sizeof(cell_t))) \
+			DO_ERR("\"%s\" property in %s has wrong size %d (should be 1 cell)\n", (propname), (node)->fullpath, prop->val.len); \
+	} while (0)
+
+#define CHECK_HAVE_WARN_ONECELL(node, propname) \
+	do { \
+		CHECK_HAVE_WARN((node), (propname)); \
+		if (prop && (prop->val.len != sizeof(cell_t))) \
+			DO_ERR("\"%s\" property in %s has wrong size %d (should be 1 cell)\n", (propname), (node)->fullpath, prop->val.len); \
+	} while (0)
+
+#define CHECK_HAVE_WARN_PHANDLE(xnode, propname, root) \
+	do { \
+		struct node *ref; \
+		CHECK_HAVE_WARN_ONECELL((xnode), (propname)); \
+		if (prop) {\
+			cell_t phandle = propval_cell(prop); \
+			if ((phandle == 0) || (phandle == -1)) { \
+				DO_ERR("\"%s\" property in %s contains an invalid phandle %x\n", (propname), (xnode)->fullpath, phandle); \
+			} else { \
+				ref = get_node_by_phandle((root), propval_cell(prop)); \
+				if (! ref) \
+					DO_ERR("\"%s\" property in %s refers to non-existant phandle %x\n", (propname), (xnode)->fullpath, propval_cell(prop)); \
+			} \
+		} \
+	} while (0)
+
+#define CHECK_HAVE_WARN_STRING(node, propname) \
+	do { \
+		CHECK_HAVE_WARN((node), (propname)); \
+		if (prop && !data_is_one_string(prop->val)) \
+			DO_ERR("\"%s\" property in %s is not a string\n", \
+				(propname), (node)->fullpath); \
+	} while (0)
+
+static int check_root(struct node *root)
+{
+	struct property *prop;
+	int ok = 1;
+
+	CHECK_HAVE_STRING(root, "model");
+	CHECK_HAVE_WARN(root, "compatible");
+
+	return ok;
+}
+
+static int check_cpus(struct node *root, int outversion, int boot_cpuid_phys)
+{
+	struct node *cpus, *cpu;
+	struct property *prop;
+	struct node *bootcpu = NULL;
+	int ok = 1;
+
+	cpus = get_subnode(root, "cpus");
+	if (! cpus) {
+		ERRMSG("Missing /cpus node\n");
+		return 0;
+	}
+
+	if (cpus->addr_cells != 1)
+		DO_ERR("%s has bad #address-cells value %d (should be 1)\n",
+		       cpus->fullpath, cpus->addr_cells);
+	if (cpus->size_cells != 0)
+		DO_ERR("%s has bad #size-cells value %d (should be 0)\n",
+		       cpus->fullpath, cpus->size_cells);
+
+	for_each_child(cpus, cpu) {
+		CHECK_HAVE_STREQ(cpu, "device_type", "cpu");
+
+		CHECK_HAVE_ONECELL(cpu, "reg");
+		if (prop) {
+			cell_t unitnum;
+			char *eptr;
+
+			unitnum = strtol(get_unitname(cpu), &eptr, 16);
+			if (*eptr) {
+				WARNMSG("%s has bad format unit name %s (should be CPU number\n",
+					cpu->fullpath, get_unitname(cpu));
+			} else if (unitnum != propval_cell(prop)) {
+				WARNMSG("%s unit name \"%s\" does not match \"reg\" property <%x>\n",
+				       cpu->fullpath, get_unitname(cpu),
+				       propval_cell(prop));
+			}
+		}
+
+/* 		CHECK_HAVE_ONECELL(cpu, "d-cache-line-size"); */
+/* 		CHECK_HAVE_ONECELL(cpu, "i-cache-line-size"); */
+		CHECK_HAVE_ONECELL(cpu, "d-cache-size");
+		CHECK_HAVE_ONECELL(cpu, "i-cache-size");
+
+		CHECK_HAVE_WARN_ONECELL(cpu, "clock-frequency");
+		CHECK_HAVE_WARN_ONECELL(cpu, "timebase-frequency");
+
+		prop = get_property(cpu, "linux,boot-cpu");
+		if (prop) {
+			if (prop->val.len)
+				WARNMSG("\"linux,boot-cpu\" property in %s is non-empty\n",
+					cpu->fullpath);
+			if (bootcpu)
+				DO_ERR("Multiple boot cpus (%s and %s)\n",
+				       bootcpu->fullpath, cpu->fullpath);
+			else
+				bootcpu = cpu;
+		}
+	}
+
+	if (outversion < 2) {
+		if (! bootcpu)
+			WARNMSG("No cpu has \"linux,boot-cpu\" property\n");
+	} else {
+		if (bootcpu)
+			WARNMSG("\"linux,boot-cpu\" property is deprecated in blob version 2 or higher\n");
+		if (boot_cpuid_phys == 0xfeedbeef)
+			WARNMSG("physical boot CPU not set.  Use -b option to set\n");
+	}
+
+	return ok;
+}
+
+static int check_memory(struct node *root)
+{
+	struct node *mem;
+	struct property *prop;
+	int nnodes = 0;
+	int ok = 1;
+
+	for_each_child(root, mem) {
+		if (! strneq(mem->name, "memory", mem->basenamelen))
+			continue;
+
+		nnodes++;
+
+		CHECK_HAVE_STREQ(mem, "device_type", "memory");
+		CHECK_HAVE(mem, "reg");
+	}
+
+	if (nnodes == 0) {
+		ERRMSG("No memory nodes\n");
+		return 0;
+	}
+
+	return ok;
+}
+
+int check_semantics(struct node *dt, int outversion, int boot_cpuid_phys)
+{
+	int ok = 1;
+
+	ok = ok && check_root(dt);
+	ok = ok && check_cpus(dt, outversion, boot_cpuid_phys);
+	ok = ok && check_memory(dt);
+	if (! ok)
+		return 0;
+
+	return 1;
+}