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diff --git a/sys/dev/fdt/fdt_common.h b/sys/dev/fdt/fdt_common.h
--- a/sys/dev/fdt/fdt_common.h
+++ b/sys/dev/fdt/fdt_common.h
@@ -76,11 +76,14 @@
SYSCTL_DECL(_hw_fdt);
+typedef void (*fdt_mem_region_cb)(const struct mem_region *, void *);
+
int fdt_addrsize_cells(phandle_t, int *, int *);
u_long fdt_data_get(void *, int);
int fdt_data_to_res(pcell_t *, int, int, u_long *, u_long *);
phandle_t fdt_find_compatible(phandle_t, const char *, int);
phandle_t fdt_depth_search_compatible(phandle_t, const char *, int);
+int fdt_foreach_mem_region(fdt_mem_region_cb, void *);
int fdt_get_mem_regions(struct mem_region *, int *, uint64_t *);
int fdt_get_reserved_mem(struct mem_region *, int *);
int fdt_get_reserved_regions(struct mem_region *, int *);
diff --git a/sys/dev/fdt/fdt_common.c b/sys/dev/fdt/fdt_common.c
--- a/sys/dev/fdt/fdt_common.c
+++ b/sys/dev/fdt/fdt_common.c
@@ -540,6 +540,53 @@
return (0);
}
+int
+fdt_foreach_mem_region(fdt_mem_region_cb cb, void *arg)
+{
+ struct mem_region mr;
+ pcell_t reg[FDT_REG_CELLS * FDT_MEM_REGIONS];
+ pcell_t *regp;
+ phandle_t memory;
+ int addr_cells, size_cells;
+ int i, reg_len, rv, tuple_size, tuples;
+
+ memory = OF_finddevice("/memory");
+ if (memory == -1)
+ return (ENXIO);
+
+ if ((rv = fdt_addrsize_cells(OF_parent(memory), &addr_cells,
+ &size_cells)) != 0)
+ return (rv);
+
+ if (addr_cells > 2)
+ return (ERANGE);
+
+ tuple_size = sizeof(pcell_t) * (addr_cells + size_cells);
+ reg_len = OF_getproplen(memory, "reg");
+ if (reg_len <= 0 || reg_len > sizeof(reg))
+ return (ERANGE);
+
+ if (OF_getprop(memory, "reg", reg, reg_len) <= 0)
+ return (ENXIO);
+
+ tuples = reg_len / tuple_size;
+ regp = (pcell_t *)&reg;
+ for (i = 0; i < tuples; i++) {
+
+ rv = fdt_data_to_res(regp, addr_cells, size_cells,
+ (u_long *)&mr.mr_start, (u_long *)&mr.mr_size);
+
+ if (rv != 0)
+ return (rv);
+
+ cb(&mr, arg);
+
+ regp += addr_cells + size_cells;
+ }
+
+ return (0);
+}
+
int
fdt_get_mem_regions(struct mem_region *mr, int *mrcnt, uint64_t *memsize)
{

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