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Diffstat (limited to 'arch/arm64/kernel/efi-stub.c')
-rw-r--r--arch/arm64/kernel/efi-stub.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/arm64/kernel/efi-stub.c b/arch/arm64/kernel/efi-stub.c
new file mode 100644
index 000000000..f5374065a
--- /dev/null
+++ b/arch/arm64/kernel/efi-stub.c
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2013, 2014 Linaro Ltd; <roy.franz@linaro.org>
+ *
+ * This file implements the EFI boot stub for the arm64 kernel.
+ * Adapted from ARM version by Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/efi.h>
+#include <asm/efi.h>
+#include <asm/sections.h>
+
+efi_status_t __init handle_kernel_image(efi_system_table_t *sys_table,
+ unsigned long *image_addr,
+ unsigned long *image_size,
+ unsigned long *reserve_addr,
+ unsigned long *reserve_size,
+ unsigned long dram_base,
+ efi_loaded_image_t *image)
+{
+ efi_status_t status;
+ unsigned long kernel_size, kernel_memsize = 0;
+
+ /* Relocate the image, if required. */
+ kernel_size = _edata - _text;
+ if (*image_addr != (dram_base + TEXT_OFFSET)) {
+ kernel_memsize = kernel_size + (_end - _edata);
+ status = efi_low_alloc(sys_table, kernel_memsize + TEXT_OFFSET,
+ SZ_2M, reserve_addr);
+ if (status != EFI_SUCCESS) {
+ pr_efi_err(sys_table, "Failed to relocate kernel\n");
+ return status;
+ }
+ memcpy((void *)*reserve_addr + TEXT_OFFSET, (void *)*image_addr,
+ kernel_size);
+ *image_addr = *reserve_addr + TEXT_OFFSET;
+ *reserve_size = kernel_memsize + TEXT_OFFSET;
+ }
+
+
+ return EFI_SUCCESS;
+}