a55c072dfe
The shared efistub code for ARM and arm64 contains a local copy of linux_banner, allowing it to be referenced from separate executables such as the ARM decompressor. However, this introduces a dependency on generated header files, causing unnecessary rebuilds of the stub itself and, in case of arm64, vmlinux which contains it. On arm64, the copy is not actually needed since we can reference the original symbol directly, and as it turns out, there may be better ways to deal with this for ARM as well, so let's remove it from the shared code. If it still needs to be reintroduced for ARM later, it should live under arch/arm anyway and not in shared code. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
80 lines
2.5 KiB
C
80 lines
2.5 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 <linux/libfdt.h>
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#include <asm/sections.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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