diff options
Diffstat (limited to 'arch/arm64/kernel/efi-stub.c')
-rw-r--r-- | arch/arm64/kernel/efi-stub.c | 78 |
1 files changed, 0 insertions, 78 deletions
diff --git a/arch/arm64/kernel/efi-stub.c b/arch/arm64/kernel/efi-stub.c deleted file mode 100644 index 78dfbd34b..000000000 --- a/arch/arm64/kernel/efi-stub.c +++ /dev/null @@ -1,78 +0,0 @@ -/* - * 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_arg, - 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; - unsigned long nr_pages; - void *old_image_addr = (void *)*image_addr; - unsigned long preferred_offset; - - /* - * The preferred offset of the kernel Image is TEXT_OFFSET bytes beyond - * a 2 MB aligned base, which itself may be lower than dram_base, as - * long as the resulting offset equals or exceeds it. - */ - preferred_offset = round_down(dram_base, SZ_2M) + TEXT_OFFSET; - if (preferred_offset < dram_base) - preferred_offset += SZ_2M; - - /* Relocate the image, if required. */ - kernel_size = _edata - _text; - if (*image_addr != preferred_offset) { - kernel_memsize = kernel_size + (_end - _edata); - - /* - * First, try a straight allocation at the preferred offset. - * This will work around the issue where, if dram_base == 0x0, - * efi_low_alloc() refuses to allocate at 0x0 (to prevent the - * address of the allocation to be mistaken for a FAIL return - * value or a NULL pointer). It will also ensure that, on - * platforms where the [dram_base, dram_base + TEXT_OFFSET) - * interval is partially occupied by the firmware (like on APM - * Mustang), we can still place the kernel at the address - * 'dram_base + TEXT_OFFSET'. - */ - *image_addr = *reserve_addr = preferred_offset; - nr_pages = round_up(kernel_memsize, EFI_ALLOC_ALIGN) / - EFI_PAGE_SIZE; - status = efi_call_early(allocate_pages, EFI_ALLOCATE_ADDRESS, - EFI_LOADER_DATA, nr_pages, - (efi_physical_addr_t *)reserve_addr); - if (status != EFI_SUCCESS) { - kernel_memsize += TEXT_OFFSET; - status = efi_low_alloc(sys_table_arg, kernel_memsize, - SZ_2M, reserve_addr); - - if (status != EFI_SUCCESS) { - pr_efi_err(sys_table_arg, "Failed to relocate kernel\n"); - return status; - } - *image_addr = *reserve_addr + TEXT_OFFSET; - } - memcpy((void *)*image_addr, old_image_addr, kernel_size); - *reserve_size = kernel_memsize; - } - - - return EFI_SUCCESS; -} |