metag: copy devicetree to non-init memory

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / metag / kernel / devtree.c

diff --git a/arch/metag/kernel/devtree.c b/arch/metag/kernel/devtree.c
index 5b6b1d8554928d058b81d48d95396ac61cacebcc..7cd02529636e955bdc2db86f24d993892b6463ee 100644 (file)
--- a/arch/metag/kernel/devtree.c
+++ b/arch/metag/kernel/devtree.c
@@ -95,3 +95,20 @@ struct machine_desc * __init setup_machine_fdt(void *dt)
 
        return mdesc_best;
 }
+
+/**
+ * copy_fdt - Copy device tree into non-init memory.
+ *
+ * We must copy the flattened device tree blob into non-init memory because the
+ * unflattened device tree will reference the strings in it directly.
+ */
+void __init copy_fdt(void)
+{
+       void *alloc = early_init_dt_alloc_memory_arch(
+                       be32_to_cpu(initial_boot_params->totalsize), 0x40);
+       if (alloc) {
+               memcpy(alloc, initial_boot_params,
+                      be32_to_cpu(initial_boot_params->totalsize));
+               initial_boot_params = alloc;
+       }
+}