58015ec6b8
If we cannot relocate the kernel Image to its preferred offset of base of DRAM plus TEXT_OFFSET, instead relocate it to the lowest available 2 MB boundary plus TEXT_OFFSET. We may lose a bit of memory at the low end, but we can still proceed normally otherwise. Acked-by: Mark Salter <msalter@redhat.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Leif Lindholm <leif.lindholm@linaro.org> Tested-by: Leif Lindholm <leif.lindholm@linaro.org> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
45 lines
1.4 KiB
C
45 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_low_alloc(sys_table, kernel_memsize + TEXT_OFFSET,
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SZ_2M, reserve_addr);
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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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memcpy((void *)*reserve_addr + TEXT_OFFSET, (void *)*image_addr,
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kernel_size);
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*image_addr = *reserve_addr + TEXT_OFFSET;
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*reserve_size = kernel_memsize + TEXT_OFFSET;
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}
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return EFI_SUCCESS;
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}
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