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https://github.com/edk2-porting/linux-next.git
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f4f75ad574
This patch changes both x86 and arm64 efistub implementations from #including shared .c files under drivers/firmware/efi to building shared code as a static library. The x86 code uses a stub built into the boot executable which uncompresses the kernel at boot time. In this case, the library is linked into the decompressor. In the arm64 case, the stub is part of the kernel proper so the library is linked into the kernel proper as well. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/*
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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 <asm/efi.h>
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#include <asm/sections.h>
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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_LOAD_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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