71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* 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>
|
|
*/
|
|
|
|
|
|
#include <linux/efi.h>
|
|
#include <asm/efi.h>
|
|
#include <asm/memory.h>
|
|
#include <asm/sections.h>
|
|
|
|
#include "efistub.h"
|
|
|
|
efi_status_t handle_kernel_image(unsigned long *image_addr,
|
|
unsigned long *image_size,
|
|
unsigned long *reserve_addr,
|
|
unsigned long *reserve_size,
|
|
efi_loaded_image_t *image,
|
|
efi_handle_t image_handle)
|
|
{
|
|
efi_status_t status;
|
|
unsigned long kernel_size, kernel_codesize, kernel_memsize;
|
|
|
|
if (image->image_base != _text) {
|
|
efi_err("FIRMWARE BUG: efi_loaded_image_t::image_base has bogus value\n");
|
|
image->image_base = _text;
|
|
}
|
|
|
|
if (!IS_ALIGNED((u64)_text, SEGMENT_ALIGN))
|
|
efi_err("FIRMWARE BUG: kernel image not aligned on %dk boundary\n",
|
|
SEGMENT_ALIGN >> 10);
|
|
|
|
kernel_size = _edata - _text;
|
|
kernel_codesize = __inittext_end - _text;
|
|
kernel_memsize = kernel_size + (_end - _edata);
|
|
*reserve_size = kernel_memsize;
|
|
*image_addr = (unsigned long)_text;
|
|
|
|
status = efi_kaslr_relocate_kernel(image_addr,
|
|
reserve_addr, reserve_size,
|
|
kernel_size, kernel_codesize,
|
|
kernel_memsize,
|
|
efi_kaslr_get_phys_seed(image_handle));
|
|
if (status != EFI_SUCCESS)
|
|
return status;
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
asmlinkage void primary_entry(void);
|
|
|
|
unsigned long primary_entry_offset(void)
|
|
{
|
|
/*
|
|
* When built as part of the kernel, the EFI stub cannot branch to the
|
|
* kernel proper via the image header, as the PE/COFF header is
|
|
* strictly not part of the in-memory presentation of the image, only
|
|
* of the file representation. So instead, we need to jump to the
|
|
* actual entrypoint in the .text region of the image.
|
|
*/
|
|
return (char *)primary_entry - _text;
|
|
}
|
|
|
|
void efi_icache_sync(unsigned long start, unsigned long end)
|
|
{
|
|
caches_clean_inval_pou(start, end);
|
|
}
|