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// SPDX-License-Identifier: GPL-2.0
/*
* Author: Yun Liu <liuyun@loongson.cn>
* Huacai Chen <chenhuacai@loongson.cn>
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*/
#include <asm/efi.h>
#include <asm/addrspace.h>
#include "efistub.h"
extern int kernel_asize;
extern int kernel_fsize;
extern int kernel_offset;
extern int kernel_entry;
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)
{
int nr_pages = round_up(kernel_asize, EFI_ALLOC_ALIGN) / EFI_PAGE_SIZE;
efi_physical_addr_t kernel_addr = EFI_KIMG_PREFERRED_ADDRESS;
efi_status_t status;
/*
* Allocate space for the kernel image at the preferred offset. This is
* the only location in memory from where we can execute the image, so
* no point in falling back to another allocation.
*/
status = efi_bs_call(allocate_pages, EFI_ALLOCATE_ADDRESS,
EFI_LOADER_DATA, nr_pages, &kernel_addr);
if (status != EFI_SUCCESS)
return status;
*image_addr = EFI_KIMG_PREFERRED_ADDRESS;
*image_size = kernel_asize;
memcpy((void *)EFI_KIMG_PREFERRED_ADDRESS,
(void *)&kernel_offset - kernel_offset,
kernel_fsize);
return status;
}
unsigned long kernel_entry_address(void)
{
unsigned long base = (unsigned long)&kernel_offset - kernel_offset;
return (unsigned long)&kernel_entry - base + VMLINUX_LOAD_ADDRESS;
}
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