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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2020 Western Digital Corporation or its affiliates.
*/
#include <linux/efi.h>
#include <asm/efi.h>
#include <asm/sections.h>
#include <asm/unaligned.h>
#include "efistub.h"
unsigned long stext_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 _start_kernel - _start;
}
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)
{
unsigned long kernel_size, kernel_codesize, kernel_memsize;
efi_status_t status;
kernel_size = _edata - _start;
kernel_codesize = __init_text_end - _start;
kernel_memsize = kernel_size + (_end - _edata);
*image_addr = (unsigned long)_start;
*image_size = kernel_memsize;
*reserve_size = *image_size;
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) {
efi_err("Failed to relocate kernel\n");
*image_size = 0;
}
return status;
}
void efi_icache_sync(unsigned long start, unsigned long end)
{
asm volatile ("fence.i" ::: "memory");
}
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