1ead384d9SHuacai Chen // SPDX-License-Identifier: GPL-2.0
2ead384d9SHuacai Chen /*
3ead384d9SHuacai Chen  * Author: Yun Liu <liuyun@loongson.cn>
4ead384d9SHuacai Chen  *         Huacai Chen <chenhuacai@loongson.cn>
5ead384d9SHuacai Chen  * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
6ead384d9SHuacai Chen  */
7ead384d9SHuacai Chen 
8ead384d9SHuacai Chen #include <asm/efi.h>
9ead384d9SHuacai Chen #include <asm/addrspace.h>
10ead384d9SHuacai Chen #include "efistub.h"
11ead384d9SHuacai Chen 
12ead384d9SHuacai Chen extern int kernel_asize;
13ead384d9SHuacai Chen extern int kernel_fsize;
14ead384d9SHuacai Chen extern int kernel_offset;
15d729b554SArd Biesheuvel extern int kernel_entry;
16ead384d9SHuacai Chen 
17ead384d9SHuacai Chen efi_status_t handle_kernel_image(unsigned long *image_addr,
18ead384d9SHuacai Chen 				 unsigned long *image_size,
19ead384d9SHuacai Chen 				 unsigned long *reserve_addr,
20ead384d9SHuacai Chen 				 unsigned long *reserve_size,
21ead384d9SHuacai Chen 				 efi_loaded_image_t *image,
22ead384d9SHuacai Chen 				 efi_handle_t image_handle)
23ead384d9SHuacai Chen {
24ead384d9SHuacai Chen 	efi_status_t status;
258364f6d0SHuacai Chen 	unsigned long kernel_addr = 0;
26ead384d9SHuacai Chen 
278364f6d0SHuacai Chen 	kernel_addr = (unsigned long)&kernel_offset - kernel_offset;
28ead384d9SHuacai Chen 
298364f6d0SHuacai Chen 	status = efi_relocate_kernel(&kernel_addr, kernel_fsize, kernel_asize,
308364f6d0SHuacai Chen 		     EFI_KIMG_PREFERRED_ADDRESS, efi_get_kimg_min_align(), 0x0);
318364f6d0SHuacai Chen 
328364f6d0SHuacai Chen 	*image_addr = kernel_addr;
33ead384d9SHuacai Chen 	*image_size = kernel_asize;
34ead384d9SHuacai Chen 
35ead384d9SHuacai Chen 	return status;
36ead384d9SHuacai Chen }
37ead384d9SHuacai Chen 
38*6e567410SWang Yao unsigned long kernel_entry_address(unsigned long kernel_addr)
390efb61c8SArd Biesheuvel {
400efb61c8SArd Biesheuvel 	unsigned long base = (unsigned long)&kernel_offset - kernel_offset;
410efb61c8SArd Biesheuvel 
42*6e567410SWang Yao 	return (unsigned long)&kernel_entry - base + kernel_addr;
430efb61c8SArd Biesheuvel }
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