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82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
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/*
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* Copyright (C) 2013, 2014 Linaro Ltd; <roy.franz@linaro.org>
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*
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* This file implements the EFI boot stub for the arm64 kernel.
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* Adapted from ARM version by Mark Salter <msalter@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/efi.h>
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#include <linux/libfdt.h>
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#include <asm/sections.h>
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#include <generated/compile.h>
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#include <generated/utsrelease.h>
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/*
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* AArch64 requires the DTB to be 8-byte aligned in the first 512MiB from
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* start of kernel and may not cross a 2MiB boundary. We set alignment to
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* 2MiB so we know it won't cross a 2MiB boundary.
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*/
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#define EFI_FDT_ALIGN SZ_2M /* used by allocate_new_fdt_and_exit_boot() */
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#define MAX_FDT_OFFSET SZ_512M
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#define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__)
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static void efi_char16_printk(efi_system_table_t *sys_table_arg,
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efi_char16_t *str);
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static efi_status_t efi_open_volume(efi_system_table_t *sys_table,
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void *__image, void **__fh);
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static efi_status_t efi_file_close(void *handle);
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static efi_status_t
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efi_file_read(void *handle, unsigned long *size, void *addr);
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static efi_status_t
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efi_file_size(efi_system_table_t *sys_table, void *__fh,
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efi_char16_t *filename_16, void **handle, u64 *file_sz);
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/* Include shared EFI stub code */
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#include "../../../drivers/firmware/efi/efi-stub-helper.c"
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#include "../../../drivers/firmware/efi/fdt.c"
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#include "../../../drivers/firmware/efi/arm-stub.c"
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static efi_status_t handle_kernel_image(efi_system_table_t *sys_table,
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unsigned long *image_addr,
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unsigned long *image_size,
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unsigned long *reserve_addr,
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unsigned long *reserve_size,
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unsigned long dram_base,
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efi_loaded_image_t *image)
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{
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efi_status_t status;
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unsigned long kernel_size, kernel_memsize = 0;
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/* Relocate the image, if required. */
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kernel_size = _edata - _text;
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if (*image_addr != (dram_base + TEXT_OFFSET)) {
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kernel_memsize = kernel_size + (_end - _edata);
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status = efi_relocate_kernel(sys_table, image_addr,
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kernel_size, kernel_memsize,
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dram_base + TEXT_OFFSET,
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PAGE_SIZE);
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if (status != EFI_SUCCESS) {
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pr_efi_err(sys_table, "Failed to relocate kernel\n");
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return status;
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}
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if (*image_addr != (dram_base + TEXT_OFFSET)) {
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pr_efi_err(sys_table, "Failed to alloc kernel memory\n");
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efi_free(sys_table, kernel_memsize, *image_addr);
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return EFI_ERROR;
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}
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*image_size = kernel_memsize;
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}
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return EFI_SUCCESS;
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}
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