drivers/firmware/efi/libstub/loongarch-stub.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Author: Yun Liu <liuyun@loongson.cn>
   4  *         Huacai Chen <chenhuacai@loongson.cn>
   5  * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
   6  */
   7
   8 #include <asm/efi.h>
   9 #include <asm/addrspace.h>
  10 #include "efistub.h"
  11
  12 extern int kernel_asize;
  13 extern int kernel_fsize;
  14 extern int kernel_offset;
  15 extern int kernel_entry;
  16
  17 efi_status_t handle_kernel_image(unsigned long *image_addr,
  18                                  unsigned long *image_size,
  19                                  unsigned long *reserve_addr,
  20                                  unsigned long *reserve_size,
  21                                  efi_loaded_image_t *image,
  22                                  efi_handle_t image_handle)
  23 {
  24         efi_status_t status;
  25         unsigned long kernel_addr = 0;
  26
  27         kernel_addr = (unsigned long)&kernel_offset - kernel_offset;
  28
  29         status = efi_relocate_kernel(&kernel_addr, kernel_fsize, kernel_asize,
  30                      EFI_KIMG_PREFERRED_ADDRESS, efi_get_kimg_min_align(), 0x0);
  31
  32         *image_addr = kernel_addr;
  33         *image_size = kernel_asize;
  34
  35         return status;
  36 }
  37
  38 unsigned long kernel_entry_address(unsigned long kernel_addr)
  39 {
  40         unsigned long base = (unsigned long)&kernel_offset - kernel_offset;
  41
  42         return (unsigned long)&kernel_entry - base + kernel_addr;
  43 }