4d4a8c96e3
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com> Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com> Reviewed-by: Ross Philipson <ross.philipson@oracle.com>
392 lines
10 KiB
C
392 lines
10 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2013 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/charset.h>
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#include <grub/command.h>
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#include <grub/err.h>
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#include <grub/file.h>
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#include <grub/fdt.h>
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#include <grub/linux.h>
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#include <grub/loader.h>
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#include <grub/mm.h>
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#include <grub/types.h>
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#include <grub/cpu/linux.h>
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#include <grub/efi/efi.h>
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#include <grub/efi/fdtload.h>
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#include <grub/efi/memory.h>
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#include <grub/efi/pe32.h>
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#include <grub/i18n.h>
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#include <grub/lib/cmdline.h>
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#include <grub/verify.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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static grub_dl_t my_mod;
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static int loaded;
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static void *kernel_addr;
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static grub_uint64_t kernel_size;
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static char *linux_args;
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static grub_uint32_t cmdline_size;
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static grub_addr_t initrd_start;
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static grub_addr_t initrd_end;
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grub_err_t
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grub_armxx_efi_linux_check_image (struct linux_armxx_kernel_header * lh)
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{
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if (lh->magic != GRUB_LINUX_ARMXX_MAGIC_SIGNATURE)
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return grub_error(GRUB_ERR_BAD_OS, "invalid magic number");
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if ((lh->code0 & 0xffff) != GRUB_PE32_MAGIC)
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return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
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N_("plain image kernel not supported - rebuild with CONFIG_(U)EFI_STUB enabled"));
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grub_dprintf ("linux", "UEFI stub kernel:\n");
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grub_dprintf ("linux", "PE/COFF header @ %08x\n", lh->hdr_offset);
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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finalize_params_linux (void)
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{
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int node, retval;
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void *fdt;
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fdt = grub_fdt_load (0x400);
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if (!fdt)
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goto failure;
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node = grub_fdt_find_subnode (fdt, 0, "chosen");
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if (node < 0)
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node = grub_fdt_add_subnode (fdt, 0, "chosen");
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if (node < 1)
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goto failure;
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/* Set initrd info */
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if (initrd_start && initrd_end > initrd_start)
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{
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grub_dprintf ("linux", "Initrd @ %p-%p\n",
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(void *) initrd_start, (void *) initrd_end);
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retval = grub_fdt_set_prop64 (fdt, node, "linux,initrd-start",
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initrd_start);
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if (retval)
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goto failure;
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retval = grub_fdt_set_prop64 (fdt, node, "linux,initrd-end",
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initrd_end);
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if (retval)
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goto failure;
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}
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if (grub_fdt_install() != GRUB_ERR_NONE)
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goto failure;
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return GRUB_ERR_NONE;
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failure:
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grub_fdt_unload();
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return grub_error(GRUB_ERR_BAD_OS, "failed to install/update FDT");
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}
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grub_err_t
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grub_armxx_efi_linux_boot_image (grub_addr_t addr, grub_size_t size, char *args)
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{
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grub_efi_memory_mapped_device_path_t *mempath;
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grub_efi_handle_t image_handle;
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grub_efi_boot_services_t *b;
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grub_efi_status_t status;
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grub_efi_loaded_image_t *loaded_image;
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int len;
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mempath = grub_malloc (2 * sizeof (grub_efi_memory_mapped_device_path_t));
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if (!mempath)
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return grub_errno;
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mempath[0].header.type = GRUB_EFI_HARDWARE_DEVICE_PATH_TYPE;
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mempath[0].header.subtype = GRUB_EFI_MEMORY_MAPPED_DEVICE_PATH_SUBTYPE;
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mempath[0].header.length = grub_cpu_to_le16_compile_time (sizeof (*mempath));
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mempath[0].memory_type = GRUB_EFI_LOADER_DATA;
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mempath[0].start_address = addr;
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mempath[0].end_address = addr + size;
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mempath[1].header.type = GRUB_EFI_END_DEVICE_PATH_TYPE;
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mempath[1].header.subtype = GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE;
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mempath[1].header.length = sizeof (grub_efi_device_path_t);
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b = grub_efi_system_table->boot_services;
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status = b->load_image (0, grub_efi_image_handle,
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(grub_efi_device_path_t *) mempath,
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(void *) addr, size, &image_handle);
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if (status != GRUB_EFI_SUCCESS)
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return grub_error (GRUB_ERR_BAD_OS, "cannot load image");
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grub_dprintf ("linux", "linux command line: '%s'\n", args);
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/* Convert command line to UCS-2 */
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loaded_image = grub_efi_get_loaded_image (image_handle);
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loaded_image->load_options_size = len =
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(grub_strlen (args) + 1) * sizeof (grub_efi_char16_t);
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loaded_image->load_options =
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grub_efi_allocate_any_pages (GRUB_EFI_BYTES_TO_PAGES (loaded_image->load_options_size));
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if (!loaded_image->load_options)
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return grub_errno;
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loaded_image->load_options_size =
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2 * grub_utf8_to_utf16 (loaded_image->load_options, len,
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(grub_uint8_t *) args, len, NULL);
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grub_dprintf ("linux", "starting image %p\n", image_handle);
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status = b->start_image (image_handle, 0, NULL);
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/* When successful, not reached */
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b->unload_image (image_handle);
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grub_efi_free_pages ((grub_addr_t) loaded_image->load_options,
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GRUB_EFI_BYTES_TO_PAGES (loaded_image->load_options_size));
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return grub_errno;
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}
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static grub_err_t
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grub_linux_boot (void)
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{
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if (finalize_params_linux () != GRUB_ERR_NONE)
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return grub_errno;
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return (grub_armxx_efi_linux_boot_image((grub_addr_t)kernel_addr,
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kernel_size, linux_args));
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}
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static grub_err_t
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grub_linux_unload (void)
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{
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grub_dl_unref (my_mod);
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loaded = 0;
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if (initrd_start)
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grub_efi_free_pages ((grub_efi_physical_address_t) initrd_start,
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GRUB_EFI_BYTES_TO_PAGES (initrd_end - initrd_start));
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initrd_start = initrd_end = 0;
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grub_free (linux_args);
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if (kernel_addr)
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grub_efi_free_pages ((grub_addr_t) kernel_addr,
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GRUB_EFI_BYTES_TO_PAGES (kernel_size));
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grub_fdt_unload ();
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return GRUB_ERR_NONE;
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}
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/*
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* As per linux/Documentation/arm/Booting
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* ARM initrd needs to be covered by kernel linear mapping,
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* so place it in the first 512MB of DRAM.
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*
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* As per linux/Documentation/arm64/booting.txt
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* ARM64 initrd needs to be contained entirely within a 1GB aligned window
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* of up to 32GB of size that covers the kernel image as well.
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* Since the EFI stub loader will attempt to load the kernel near start of
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* RAM, place the buffer in the first 32GB of RAM.
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*/
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#ifdef __arm__
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#define INITRD_MAX_ADDRESS_OFFSET (512U * 1024 * 1024)
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#else /* __aarch64__ */
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#define INITRD_MAX_ADDRESS_OFFSET (32ULL * 1024 * 1024 * 1024)
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#endif
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/*
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* This function returns a pointer to a legally allocated initrd buffer,
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* or NULL if unsuccessful
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*/
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static void *
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allocate_initrd_mem (int initrd_pages)
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{
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grub_addr_t max_addr;
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if (grub_efi_get_ram_base (&max_addr) != GRUB_ERR_NONE)
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return NULL;
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max_addr += INITRD_MAX_ADDRESS_OFFSET - 1;
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return grub_efi_allocate_pages_real (max_addr, initrd_pages,
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GRUB_EFI_ALLOCATE_MAX_ADDRESS,
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GRUB_EFI_LOADER_DATA);
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}
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static grub_err_t
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grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
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int argc, char *argv[])
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{
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struct grub_linux_initrd_context initrd_ctx = { 0, 0, 0 };
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int initrd_size, initrd_pages;
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void *initrd_mem = NULL;
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if (argc == 0)
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{
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grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
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goto fail;
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}
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if (!loaded)
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{
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grub_error (GRUB_ERR_BAD_ARGUMENT,
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N_("you need to load the kernel first"));
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goto fail;
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}
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if (grub_initrd_init (argc, argv, &initrd_ctx))
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goto fail;
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initrd_size = grub_get_initrd_size (&initrd_ctx);
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grub_dprintf ("linux", "Loading initrd\n");
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initrd_pages = (GRUB_EFI_BYTES_TO_PAGES (initrd_size));
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initrd_mem = allocate_initrd_mem (initrd_pages);
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if (!initrd_mem)
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{
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grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));
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goto fail;
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}
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if (grub_initrd_load (&initrd_ctx, argv, initrd_mem))
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goto fail;
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initrd_start = (grub_addr_t) initrd_mem;
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initrd_end = initrd_start + initrd_size;
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grub_dprintf ("linux", "[addr=%p, size=0x%x]\n",
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(void *) initrd_start, initrd_size);
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fail:
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grub_initrd_close (&initrd_ctx);
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if (initrd_mem && !initrd_start)
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grub_efi_free_pages ((grub_addr_t) initrd_mem, initrd_pages);
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return grub_errno;
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}
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static grub_err_t
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grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
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int argc, char *argv[])
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{
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grub_file_t file = 0;
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struct linux_armxx_kernel_header lh;
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grub_dl_ref (my_mod);
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if (argc == 0)
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{
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grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
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goto fail;
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}
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file = grub_file_open (argv[0]);
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if (!file)
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goto fail;
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kernel_size = grub_file_size (file);
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if (grub_file_read (file, &lh, sizeof (lh)) < (long) sizeof (lh))
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return grub_errno;
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if (grub_armxx_efi_linux_check_image (&lh) != GRUB_ERR_NONE)
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goto fail;
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grub_loader_unset();
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grub_dprintf ("linux", "kernel file size: %lld\n", (long long) kernel_size);
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kernel_addr = grub_efi_allocate_any_pages (GRUB_EFI_BYTES_TO_PAGES (kernel_size));
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grub_dprintf ("linux", "kernel numpages: %lld\n",
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(long long) GRUB_EFI_BYTES_TO_PAGES (kernel_size));
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if (!kernel_addr)
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{
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grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));
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goto fail;
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}
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grub_file_seek (file, 0);
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if (grub_file_read (file, kernel_addr, kernel_size)
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< (grub_int64_t) kernel_size)
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{
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if (!grub_errno)
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grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"), argv[0]);
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goto fail;
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}
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grub_dprintf ("linux", "kernel @ %p\n", kernel_addr);
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cmdline_size = grub_loader_cmdline_size (argc, argv) + sizeof (LINUX_IMAGE);
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linux_args = grub_malloc (cmdline_size);
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if (!linux_args)
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{
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grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));
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goto fail;
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}
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grub_memcpy (linux_args, LINUX_IMAGE, sizeof (LINUX_IMAGE));
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err = grub_create_loader_cmdline (argc, argv,
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linux_args + sizeof (LINUX_IMAGE) - 1,
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cmdline_size,
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GRUB_VERIFY_KERNEL_CMDLINE);
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if (err)
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goto fail;
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if (grub_errno == GRUB_ERR_NONE)
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{
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grub_loader_set (grub_linux_boot, grub_linux_unload, 0);
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loaded = 1;
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}
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fail:
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if (file)
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grub_file_close (file);
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if (grub_errno != GRUB_ERR_NONE)
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{
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grub_dl_unref (my_mod);
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loaded = 0;
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}
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if (linux_args && !loaded)
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grub_free (linux_args);
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if (kernel_addr && !loaded)
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grub_efi_free_pages ((grub_addr_t) kernel_addr,
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GRUB_EFI_BYTES_TO_PAGES (kernel_size));
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return grub_errno;
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}
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static grub_command_t cmd_linux, cmd_initrd;
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GRUB_MOD_INIT (linux)
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{
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cmd_linux = grub_register_command ("linux", grub_cmd_linux, 0,
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N_("Load Linux."));
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cmd_initrd = grub_register_command ("initrd", grub_cmd_initrd, 0,
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N_("Load initrd."));
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my_mod = mod;
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}
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GRUB_MOD_FINI (linux)
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{
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grub_unregister_command (cmd_linux);
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grub_unregister_command (cmd_initrd);
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}
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