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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/firmware/efi/libstub/arm64-stub.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/firmware/efi/libstub/arm64-stub.c')
-rw-r--r-- | drivers/firmware/efi/libstub/arm64-stub.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/drivers/firmware/efi/libstub/arm64-stub.c b/drivers/firmware/efi/libstub/arm64-stub.c new file mode 100644 index 0000000000..452b7ccd33 --- /dev/null +++ b/drivers/firmware/efi/libstub/arm64-stub.c @@ -0,0 +1,70 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2013, 2014 Linaro Ltd; <roy.franz@linaro.org> + * + * This file implements the EFI boot stub for the arm64 kernel. + * Adapted from ARM version by Mark Salter <msalter@redhat.com> + */ + + +#include <linux/efi.h> +#include <asm/efi.h> +#include <asm/memory.h> +#include <asm/sections.h> + +#include "efistub.h" + +efi_status_t handle_kernel_image(unsigned long *image_addr, + unsigned long *image_size, + unsigned long *reserve_addr, + unsigned long *reserve_size, + efi_loaded_image_t *image, + efi_handle_t image_handle) +{ + efi_status_t status; + unsigned long kernel_size, kernel_codesize, kernel_memsize; + + if (image->image_base != _text) { + efi_err("FIRMWARE BUG: efi_loaded_image_t::image_base has bogus value\n"); + image->image_base = _text; + } + + if (!IS_ALIGNED((u64)_text, SEGMENT_ALIGN)) + efi_err("FIRMWARE BUG: kernel image not aligned on %dk boundary\n", + SEGMENT_ALIGN >> 10); + + kernel_size = _edata - _text; + kernel_codesize = __inittext_end - _text; + kernel_memsize = kernel_size + (_end - _edata); + *reserve_size = kernel_memsize; + *image_addr = (unsigned long)_text; + + status = efi_kaslr_relocate_kernel(image_addr, + reserve_addr, reserve_size, + kernel_size, kernel_codesize, + kernel_memsize, + efi_kaslr_get_phys_seed(image_handle)); + if (status != EFI_SUCCESS) + return status; + + return EFI_SUCCESS; +} + +asmlinkage void primary_entry(void); + +unsigned long primary_entry_offset(void) +{ + /* + * When built as part of the kernel, the EFI stub cannot branch to the + * kernel proper via the image header, as the PE/COFF header is + * strictly not part of the in-memory presentation of the image, only + * of the file representation. So instead, we need to jump to the + * actual entrypoint in the .text region of the image. + */ + return (char *)primary_entry - _text; +} + +void efi_icache_sync(unsigned long start, unsigned long end) +{ + caches_clean_inval_pou(start, end); +} |