of: create default early_init_dt_add_memory_arch

[karo-tx-linux.git] / drivers / of / fdt.c

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index bfbfda5437682c54a79e76cbb3cbacbbe0f43bd7..5bc55b6e2b41e9afa791ea576527e0aa77f3f795 100644 (file)
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -775,6 +775,25 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
 }
 
 #ifdef CONFIG_HAVE_MEMBLOCK
+void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size)
+{
+       const u64 phys_offset = __pa(PAGE_OFFSET);
+       base &= PAGE_MASK;
+       size &= PAGE_MASK;
+       if (base + size < phys_offset) {
+               pr_warning("Ignoring memory block 0x%llx - 0x%llx\n",
+                          base, base + size);
+               return;
+       }
+       if (base < phys_offset) {
+               pr_warning("Ignoring memory range 0x%llx - 0x%llx\n",
+                          base, phys_offset);
+               size -= phys_offset - base;
+               base = phys_offset;
+       }
+       memblock_add(base, size);
+}
+
 /*
  * called from unflatten_device_tree() to bootstrap devicetree itself
  * Architectures can override this definition if memblock isn't used