Mark Salter | 3c7f255 | 2014-04-15 22:47:52 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013, 2014 Linaro Ltd; <roy.franz@linaro.org> |
| 3 | * |
| 4 | * This file implements the EFI boot stub for the arm64 kernel. |
| 5 | * Adapted from ARM version by Mark Salter <msalter@redhat.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | */ |
| 12 | #include <linux/efi.h> |
Ard Biesheuvel | a13b007 | 2014-07-02 14:54:41 +0200 | [diff] [blame] | 13 | #include <asm/efi.h> |
Mark Salter | 3c7f255 | 2014-04-15 22:47:52 -0400 | [diff] [blame] | 14 | #include <asm/sections.h> |
Mark Salter | 3c7f255 | 2014-04-15 22:47:52 -0400 | [diff] [blame] | 15 | |
Ard Biesheuvel | ddeeefe | 2015-01-12 20:28:20 +0000 | [diff] [blame] | 16 | efi_status_t __init handle_kernel_image(efi_system_table_t *sys_table, |
| 17 | unsigned long *image_addr, |
| 18 | unsigned long *image_size, |
| 19 | unsigned long *reserve_addr, |
| 20 | unsigned long *reserve_size, |
| 21 | unsigned long dram_base, |
| 22 | efi_loaded_image_t *image) |
Mark Salter | 3c7f255 | 2014-04-15 22:47:52 -0400 | [diff] [blame] | 23 | { |
| 24 | efi_status_t status; |
| 25 | unsigned long kernel_size, kernel_memsize = 0; |
| 26 | |
| 27 | /* Relocate the image, if required. */ |
| 28 | kernel_size = _edata - _text; |
| 29 | if (*image_addr != (dram_base + TEXT_OFFSET)) { |
| 30 | kernel_memsize = kernel_size + (_end - _edata); |
Ard Biesheuvel | 58015ec | 2014-07-30 11:59:04 +0100 | [diff] [blame] | 31 | status = efi_low_alloc(sys_table, kernel_memsize + TEXT_OFFSET, |
| 32 | SZ_2M, reserve_addr); |
Mark Salter | 3c7f255 | 2014-04-15 22:47:52 -0400 | [diff] [blame] | 33 | if (status != EFI_SUCCESS) { |
| 34 | pr_efi_err(sys_table, "Failed to relocate kernel\n"); |
| 35 | return status; |
| 36 | } |
Ard Biesheuvel | 58015ec | 2014-07-30 11:59:04 +0100 | [diff] [blame] | 37 | memcpy((void *)*reserve_addr + TEXT_OFFSET, (void *)*image_addr, |
| 38 | kernel_size); |
| 39 | *image_addr = *reserve_addr + TEXT_OFFSET; |
| 40 | *reserve_size = kernel_memsize + TEXT_OFFSET; |
Mark Salter | 3c7f255 | 2014-04-15 22:47:52 -0400 | [diff] [blame] | 41 | } |
| 42 | |
| 43 | |
| 44 | return EFI_SUCCESS; |
| 45 | } |