1 /* multiboot.c - boot a multiboot OS image. */
3 * GRUB -- GRand Unified Bootloader
4 * Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2007,2008,2009,2010 Free Software Foundation, Inc.
6 * GRUB is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * GRUB is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
21 * FIXME: The following features from the Multiboot specification still
22 * need to be implemented:
24 * - ROM configuration table
26 * - Networking information
29 #include <grub/loader.h>
30 #include <grub/command.h>
31 #ifdef GRUB_USE_MULTIBOOT2
32 #include <grub/multiboot2.h>
33 #define GRUB_MULTIBOOT_CONSOLE_FRAMEBUFFER GRUB_MULTIBOOT2_CONSOLE_FRAMEBUFFER
34 #define GRUB_MULTIBOOT_CONSOLE_EGA_TEXT GRUB_MULTIBOOT2_CONSOLE_EGA_TEXT
35 #define GRUB_MULTIBOOT(x) grub_multiboot2_ ## x
37 #include <grub/multiboot.h>
38 #define GRUB_MULTIBOOT(x) grub_multiboot_ ## x
40 #include <grub/cpu/multiboot.h>
42 #include <grub/aout.h>
43 #include <grub/file.h>
47 #include <grub/misc.h>
49 #include <grub/cpu/relocator.h>
50 #include <grub/video.h>
51 #include <grub/memory.h>
52 #include <grub/i18n.h>
54 GRUB_MOD_LICENSE ("GPLv3+");
56 #ifdef GRUB_MACHINE_EFI
57 #include <grub/efi/efi.h>
60 struct grub_relocator *GRUB_MULTIBOOT (relocator) = NULL;
61 grub_uint32_t GRUB_MULTIBOOT (payload_eip);
62 #if defined (GRUB_MACHINE_PCBIOS) || defined (GRUB_MACHINE_MULTIBOOT) || defined (GRUB_MACHINE_COREBOOT) || defined (GRUB_MACHINE_QEMU)
63 #define DEFAULT_VIDEO_MODE "text"
65 #define DEFAULT_VIDEO_MODE "auto"
68 static int accepts_video;
69 static int accepts_ega_text;
70 static int console_required;
71 static grub_dl_t my_mod;
74 /* Helper for grub_get_multiboot_mmap_count. */
76 count_hook (grub_uint64_t addr __attribute__ ((unused)),
77 grub_uint64_t size __attribute__ ((unused)),
78 grub_memory_type_t type __attribute__ ((unused)), void *data)
80 grub_size_t *count = data;
86 /* Return the length of the Multiboot mmap that will be needed to allocate
87 our platform's map. */
89 GRUB_MULTIBOOT (get_mmap_count) (void)
91 grub_size_t count = 0;
93 grub_mmap_iterate (count_hook, &count);
99 GRUB_MULTIBOOT (set_video_mode) (void)
104 #if GRUB_MACHINE_HAS_VGA_TEXT
108 modevar = grub_env_get ("gfxpayload");
109 if (! modevar || *modevar == 0)
110 err = grub_video_set_mode (DEFAULT_VIDEO_MODE, 0, 0);
114 tmp = grub_xasprintf ("%s;" DEFAULT_VIDEO_MODE, modevar);
117 err = grub_video_set_mode (tmp, 0, 0);
121 #if GRUB_MACHINE_HAS_VGA_TEXT
123 err = grub_video_set_mode ("text", 0, 0);
129 #ifdef GRUB_MACHINE_EFI
131 #define grub_relocator_efi_boot grub_relocator64_efi_boot
132 #define grub_relocator_efi_state grub_relocator64_efi_state
136 #ifdef grub_relocator_efi_boot
138 efi_boot (struct grub_relocator *rel,
139 grub_uint32_t target)
141 #ifdef GRUB_USE_MULTIBOOT2
142 struct grub_relocator_efi_state state_efi = MULTIBOOT2_EFI_INITIAL_STATE;
144 struct grub_relocator_efi_state state_efi = MULTIBOOT_EFI_INITIAL_STATE;
146 state_efi.MULTIBOOT_EFI_ENTRY_REGISTER = GRUB_MULTIBOOT (payload_eip);
147 state_efi.MULTIBOOT_EFI_MBI_REGISTER = target;
149 grub_relocator_efi_boot (rel, state_efi);
152 #define grub_efi_is_finished 1
154 efi_boot (struct grub_relocator *rel __attribute__ ((unused)),
155 grub_uint32_t target __attribute__ ((unused)))
160 #if defined (__i386__) || defined (__x86_64__)
162 normal_boot (struct grub_relocator *rel, struct grub_relocator32_state state)
164 grub_relocator32_boot (rel, state, 0);
168 normal_boot (struct grub_relocator *rel, struct grub_relocator32_state state)
170 grub_relocator32_boot (rel, state);
175 grub_multiboot_boot (void)
179 #ifdef GRUB_USE_MULTIBOOT2
180 struct grub_relocator32_state state = MULTIBOOT2_INITIAL_STATE;
182 struct grub_relocator32_state state = MULTIBOOT_INITIAL_STATE;
184 state.MULTIBOOT_ENTRY_REGISTER = GRUB_MULTIBOOT (payload_eip);
186 err = GRUB_MULTIBOOT (make_mbi) (&state.MULTIBOOT_MBI_REGISTER);
191 if (grub_efi_is_finished)
192 normal_boot (GRUB_MULTIBOOT (relocator), state);
194 efi_boot (GRUB_MULTIBOOT (relocator), state.MULTIBOOT_MBI_REGISTER);
197 return GRUB_ERR_NONE;
201 grub_multiboot_unload (void)
203 GRUB_MULTIBOOT (free_mbi) ();
205 grub_relocator_unload (GRUB_MULTIBOOT (relocator));
206 GRUB_MULTIBOOT (relocator) = NULL;
208 grub_dl_unref (my_mod);
210 return GRUB_ERR_NONE;
213 static grub_uint64_t highest_load;
215 #define MULTIBOOT_LOAD_ELF64
216 #include "multiboot_elfxx.c"
217 #undef MULTIBOOT_LOAD_ELF64
219 #define MULTIBOOT_LOAD_ELF32
220 #include "multiboot_elfxx.c"
221 #undef MULTIBOOT_LOAD_ELF32
223 /* Load ELF32 or ELF64. */
225 GRUB_MULTIBOOT (load_elf) (mbi_load_data_t *mld)
227 if (grub_multiboot_is_elf32 (mld->buffer))
228 return grub_multiboot_load_elf32 (mld);
229 else if (grub_multiboot_is_elf64 (mld->buffer))
230 return grub_multiboot_load_elf64 (mld);
232 return grub_error (GRUB_ERR_UNKNOWN_OS, N_("invalid arch-dependent ELF magic"));
236 GRUB_MULTIBOOT (set_console) (int console_type, int accepted_consoles,
237 int width, int height, int depth,
240 console_required = console_req;
241 if (!(accepted_consoles
242 & (GRUB_MULTIBOOT_CONSOLE_FRAMEBUFFER
243 | (GRUB_MACHINE_HAS_VGA_TEXT ? GRUB_MULTIBOOT_CONSOLE_EGA_TEXT : 0))))
245 if (console_required)
246 return grub_error (GRUB_ERR_BAD_OS,
247 "OS requires a console but none is available");
248 grub_puts_ (N_("WARNING: no console will be available to OS"));
250 accepts_ega_text = 0;
251 return GRUB_ERR_NONE;
254 if (console_type == GRUB_MULTIBOOT_CONSOLE_FRAMEBUFFER)
257 if (depth && width && height)
258 buf = grub_xasprintf ("%dx%dx%d,%dx%d,auto", width,
259 height, depth, width, height);
260 else if (width && height)
261 buf = grub_xasprintf ("%dx%d,auto", width, height);
263 buf = grub_strdup ("auto");
267 grub_env_set ("gfxpayload", buf);
272 #if GRUB_MACHINE_HAS_VGA_TEXT
273 grub_env_set ("gfxpayload", "text");
275 /* Always use video if no VGA text is available. */
276 grub_env_set ("gfxpayload", "auto");
280 accepts_video = !!(accepted_consoles & GRUB_MULTIBOOT_CONSOLE_FRAMEBUFFER);
281 accepts_ega_text = !!(accepted_consoles & GRUB_MULTIBOOT_CONSOLE_EGA_TEXT);
282 return GRUB_ERR_NONE;
286 grub_cmd_multiboot (grub_command_t cmd __attribute__ ((unused)),
287 int argc, char *argv[])
289 grub_file_t file = 0;
292 grub_loader_unset ();
296 #ifndef GRUB_USE_MULTIBOOT2
297 grub_multiboot_quirks = GRUB_MULTIBOOT_QUIRKS_NONE;
298 int option_found = 0;
303 if (argc != 0 && grub_strcmp (argv[0], "--quirk-bad-kludge") == 0)
308 grub_multiboot_quirks |= GRUB_MULTIBOOT_QUIRK_BAD_KLUDGE;
311 if (argc != 0 && grub_strcmp (argv[0], "--quirk-modules-after-kernel") == 0)
316 grub_multiboot_quirks |= GRUB_MULTIBOOT_QUIRK_MODULES_AFTER_KERNEL;
318 } while (option_found);
322 return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
324 file = grub_file_open (argv[0]);
328 grub_dl_ref (my_mod);
331 GRUB_MULTIBOOT (init_mbi) (argc - 1, argv + 1);
333 grub_relocator_unload (GRUB_MULTIBOOT (relocator));
334 GRUB_MULTIBOOT (relocator) = grub_relocator_new ();
336 if (!GRUB_MULTIBOOT (relocator))
339 err = GRUB_MULTIBOOT (load) (file, argv[0]);
343 GRUB_MULTIBOOT (set_bootdev) ();
345 grub_loader_set (grub_multiboot_boot, grub_multiboot_unload, 0);
349 grub_file_close (file);
351 if (grub_errno != GRUB_ERR_NONE)
353 grub_relocator_unload (GRUB_MULTIBOOT (relocator));
354 GRUB_MULTIBOOT (relocator) = NULL;
355 grub_dl_unref (my_mod);
362 grub_cmd_module (grub_command_t cmd __attribute__ ((unused)),
363 int argc, char *argv[])
365 grub_file_t file = 0;
371 grub_uint64_t lowest_addr = 0;
374 return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
376 if (grub_strcmp (argv[0], "--nounzip") == 0)
384 return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
386 if (!GRUB_MULTIBOOT (relocator))
387 return grub_error (GRUB_ERR_BAD_ARGUMENT,
388 N_("you need to load the kernel first"));
391 grub_file_filter_disable_compression ();
393 file = grub_file_open (argv[0]);
397 #ifndef GRUB_USE_MULTIBOOT2
398 lowest_addr = 0x100000;
399 if (grub_multiboot_quirks & GRUB_MULTIBOOT_QUIRK_MODULES_AFTER_KERNEL)
400 lowest_addr = ALIGN_UP (highest_load + 1048576, 4096);
403 size = grub_file_size (file);
406 grub_relocator_chunk_t ch;
407 err = grub_relocator_alloc_chunk_align (GRUB_MULTIBOOT (relocator), &ch,
408 lowest_addr, (0xffffffff - size) + 1,
409 size, MULTIBOOT_MOD_ALIGN,
410 GRUB_RELOCATOR_PREFERENCE_NONE, 1);
413 grub_file_close (file);
416 module = get_virtual_current_address (ch);
417 target = get_physical_target_address (ch);
425 err = GRUB_MULTIBOOT (add_module) (target, size, argc - 1, argv + 1);
428 grub_file_close (file);
432 if (size && grub_file_read (file, module, size) != size)
434 grub_file_close (file);
436 grub_error (GRUB_ERR_FILE_READ_ERROR, N_("premature end of file %s"),
441 grub_file_close (file);
442 return GRUB_ERR_NONE;
445 static grub_command_t cmd_multiboot, cmd_module;
447 GRUB_MOD_INIT(multiboot)
450 #ifdef GRUB_USE_MULTIBOOT2
451 grub_register_command ("multiboot2", grub_cmd_multiboot,
452 0, N_("Load a multiboot 2 kernel."));
454 grub_register_command ("module2", grub_cmd_module,
455 0, N_("Load a multiboot 2 module."));
457 grub_register_command ("multiboot", grub_cmd_multiboot,
458 0, N_("Load a multiboot kernel."));
460 grub_register_command ("module", grub_cmd_module,
461 0, N_("Load a multiboot module."));
467 GRUB_MOD_FINI(multiboot)
469 grub_unregister_command (cmd_multiboot);
470 grub_unregister_command (cmd_module);