libfdt: Add some utilities to manipulate the reserved memory map.

index 61f56ec..f8bac73 100644
@@ -86,6 +86,8 @@ void *fdt_getprop(const void *fdt, int nodeoffset,
 
 uint32_t fdt_next_tag(const void *fdt, int offset,
 		      int *nextoffset, char **namep);
+int fdt_num_reservemap(void *fdt, int *used, int *total);
+int fdt_get_reservemap(void *fdt, int n, struct fdt_reserve_entry *re);
 
 /* Write-in-place functions */
 int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,

@@ -99,6 +101,8 @@ int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
 
 int fdt_nop_property(void *fdt, int nodeoffset, const char *name);
 int fdt_nop_node(void *fdt, int nodeoffset);
+int fdt_insert_reservemap_entry(void *fdt, int n, uint64_t addr, uint64_t size);
+
 
 /* Sequential-write functions */
 int fdt_create(void *buf, int bufsize);

@@ -115,6 +119,7 @@ int fdt_property(void *fdt, const char *name, const void *val, int len);
 	fdt_property(fdt, name, str, strlen(str)+1)
 int fdt_end_node(void *fdt);
 int fdt_finish(void *fdt);
+int fdt_replace_reservemap_entry(void *fdt, int n, uint64_t addr, uint64_t size);
 
 /* Read-write functions */
 int fdt_open_into(void *fdt, void *buf, int bufsize);

75 lines not on this page · raw message

index 261b9b0..cf81183 100644
@@ -110,3 +110,29 @@ int fdt_nop_node(void *fdt, int nodeoffset)
 	nop_region(fdt_offset_ptr(fdt, nodeoffset, 0), endoffset - nodeoffset);
 	return 0;
 }
+
+/*
+ * Replace a reserve map entry in the nth slot.
+ */
+int fdt_replace_reservemap_entry(void *fdt, int n, uint64_t addr, uint64_t size)
+{
+	struct fdt_reserve_entry *re;
+	int  used;
+	int  total;
+	int  err;
+
+	err = fdt_num_reservemap(fdt, &used, &total);
+	if (err != 0)
+		return err;
+
+	if (n >= total)
+		return -FDT_ERR_NOSPACE;
+	re = (struct fdt_reserve_entry *)
+		(fdt + fdt_off_mem_rsvmap(fdt) +
+		 (n * sizeof(struct fdt_reserve_entry)));
+	re->address = cpu_to_fdt64(addr);
+	re->size    = cpu_to_fdt64(size);
+
+	return 0;
+}
+