diff options
Diffstat (limited to 'arch/arm64/kernel/efi-stub.c')
| -rw-r--r-- | arch/arm64/kernel/efi-stub.c | 45 |
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; +} |