2 * GRUB -- GRand Unified Bootloader
3 * Copyright (C) 2006,2007,2008,2009,2010 Free Software Foundation, Inc.
5 * GRUB is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * GRUB is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
19 #include <grub/loader.h>
20 #include <grub/memory.h>
21 #include <grub/normal.h>
22 #include <grub/file.h>
23 #include <grub/disk.h>
25 #include <grub/misc.h>
26 #include <grub/types.h>
29 #include <grub/term.h>
30 #include <grub/cpu/linux.h>
31 #include <grub/video.h>
32 #include <grub/video_fb.h>
33 #include <grub/command.h>
34 #include <grub/i386/relocator.h>
35 #include <grub/i18n.h>
36 #include <grub/lib/cmdline.h>
37 #include <grub/linux.h>
39 GRUB_MOD_LICENSE ("GPLv3+");
41 #ifdef GRUB_MACHINE_PCBIOS
42 #include <grub/i386/pc/vesa_modes_table.h>
45 #ifdef GRUB_MACHINE_EFI
46 #include <grub/efi/efi.h>
47 #define HAS_VGA_TEXT 0
48 #define DEFAULT_VIDEO_MODE "auto"
49 #define ACCEPTS_PURE_TEXT 0
50 #elif defined (GRUB_MACHINE_IEEE1275)
51 #include <grub/ieee1275/ieee1275.h>
52 #define HAS_VGA_TEXT 0
53 #define DEFAULT_VIDEO_MODE "text"
54 #define ACCEPTS_PURE_TEXT 1
56 #include <grub/i386/pc/vbe.h>
57 #include <grub/i386/pc/console.h>
58 #define HAS_VGA_TEXT 1
59 #define DEFAULT_VIDEO_MODE "text"
60 #define ACCEPTS_PURE_TEXT 1
63 static grub_dl_t my_mod;
65 static grub_size_t linux_mem_size;
67 static void *prot_mode_mem;
68 static grub_addr_t prot_mode_target;
69 static void *initrd_mem;
70 static grub_addr_t initrd_mem_target;
71 static grub_size_t prot_init_space;
72 static struct grub_relocator *relocator = NULL;
73 static void *efi_mmap_buf;
74 static grub_size_t maximal_cmdline_size;
75 static struct linux_kernel_params linux_params;
76 static char *linux_cmdline;
77 #ifdef GRUB_MACHINE_EFI
78 static grub_efi_uintn_t efi_mmap_size;
80 static const grub_size_t efi_mmap_size = 0;
91 static struct idt_descriptor idt_desc =
98 static inline grub_size_t
99 page_align (grub_size_t size)
101 return (size + (1 << 12) - 1) & (~((1 << 12) - 1));
104 #ifdef GRUB_MACHINE_EFI
105 /* Find the optimal number of pages for the memory map. Is it better to
106 move this code to efi/mm.c? */
107 static grub_efi_uintn_t
108 find_efi_mmap_size (void)
110 static grub_efi_uintn_t mmap_size = 0;
115 mmap_size = (1 << 12);
119 grub_efi_memory_descriptor_t *mmap;
120 grub_efi_uintn_t desc_size;
121 grub_efi_uintn_t cur_mmap_size = mmap_size;
123 mmap = grub_malloc (cur_mmap_size);
127 ret = grub_efi_get_memory_map (&cur_mmap_size, mmap, 0, &desc_size, 0);
132 grub_error (GRUB_ERR_IO, "cannot get memory map");
138 if (mmap_size < cur_mmap_size)
139 mmap_size = cur_mmap_size;
140 mmap_size += (1 << 12);
143 /* Increase the size a bit for safety, because GRUB allocates more on
144 later, and EFI itself may allocate more. */
145 mmap_size += (3 << 12);
147 mmap_size = page_align (mmap_size);
153 /* Helper for find_mmap_size. */
155 count_hook (grub_uint64_t addr __attribute__ ((unused)),
156 grub_uint64_t size __attribute__ ((unused)),
157 grub_memory_type_t type __attribute__ ((unused)), void *data)
159 grub_size_t *count = data;
165 /* Find the optimal number of pages for the memory map. */
167 find_mmap_size (void)
169 grub_size_t count = 0, mmap_size;
171 grub_mmap_iterate (count_hook, &count);
173 mmap_size = count * sizeof (struct grub_e820_mmap);
175 /* Increase the size a bit for safety, because GRUB allocates more on
177 mmap_size += (1 << 12);
179 return page_align (mmap_size);
185 grub_relocator_unload (relocator);
187 prot_mode_mem = initrd_mem = 0;
188 prot_mode_target = initrd_mem_target = 0;
191 /* Allocate pages for the real mode code and the protected mode code
192 for linux as well as a memory map buffer. */
194 allocate_pages (grub_size_t prot_size, grub_size_t *align,
195 grub_size_t min_align, int relocatable,
196 grub_uint64_t preferred_address)
203 prot_size = page_align (prot_size);
205 /* Initialize the memory pointers with NULL for convenience. */
208 relocator = grub_relocator_new ();
215 /* FIXME: Should request low memory from the heap when this feature is
219 grub_relocator_chunk_t ch;
222 err = grub_relocator_alloc_chunk_align (relocator, &ch,
226 GRUB_RELOCATOR_PREFERENCE_LOW,
228 for (; err && *align + 1 > min_align; (*align)--)
230 grub_errno = GRUB_ERR_NONE;
231 err = grub_relocator_alloc_chunk_align (relocator, &ch,
233 0xffffffff & ~prot_size,
234 prot_size, 1 << *align,
235 GRUB_RELOCATOR_PREFERENCE_LOW,
242 err = grub_relocator_alloc_chunk_addr (relocator, &ch,
247 prot_mode_mem = get_virtual_current_address (ch);
248 prot_mode_target = get_physical_target_address (ch);
251 grub_dprintf ("linux", "prot_mode_mem = %p, prot_mode_target = %lx, prot_size = %x\n",
252 prot_mode_mem, (unsigned long) prot_mode_target,
253 (unsigned) prot_size);
254 return GRUB_ERR_NONE;
262 grub_e820_add_region (struct grub_e820_mmap *e820_map, int *e820_num,
263 grub_uint64_t start, grub_uint64_t size,
268 if ((n > 0) && (e820_map[n - 1].addr + e820_map[n - 1].size == start) &&
269 (e820_map[n - 1].type == type))
270 e820_map[n - 1].size += size;
273 e820_map[n].addr = start;
274 e820_map[n].size = size;
275 e820_map[n].type = type;
278 return GRUB_ERR_NONE;
282 grub_linux_setup_video (struct linux_kernel_params *params)
284 struct grub_video_mode_info mode_info;
287 grub_video_driver_id_t driver_id;
288 const char *gfxlfbvar = grub_env_get ("gfxpayloadforcelfb");
290 driver_id = grub_video_get_driver_id ();
292 if (driver_id == GRUB_VIDEO_DRIVER_NONE)
295 err = grub_video_get_info_and_fini (&mode_info, &framebuffer);
299 grub_errno = GRUB_ERR_NONE;
303 params->lfb_width = mode_info.width;
304 params->lfb_height = mode_info.height;
305 params->lfb_depth = mode_info.bpp;
306 params->lfb_line_len = mode_info.pitch;
308 params->lfb_base = (grub_size_t) framebuffer;
309 params->lfb_size = ALIGN_UP (params->lfb_line_len * params->lfb_height, 65536);
311 params->red_mask_size = mode_info.red_mask_size;
312 params->red_field_pos = mode_info.red_field_pos;
313 params->green_mask_size = mode_info.green_mask_size;
314 params->green_field_pos = mode_info.green_field_pos;
315 params->blue_mask_size = mode_info.blue_mask_size;
316 params->blue_field_pos = mode_info.blue_field_pos;
317 params->reserved_mask_size = mode_info.reserved_mask_size;
318 params->reserved_field_pos = mode_info.reserved_field_pos;
320 if (gfxlfbvar && (gfxlfbvar[0] == '1' || gfxlfbvar[0] == 'y'))
321 params->have_vga = GRUB_VIDEO_LINUX_TYPE_SIMPLE;
326 case GRUB_VIDEO_DRIVER_VBE:
327 params->lfb_size >>= 16;
328 params->have_vga = GRUB_VIDEO_LINUX_TYPE_VESA;
331 case GRUB_VIDEO_DRIVER_EFI_UGA:
332 case GRUB_VIDEO_DRIVER_EFI_GOP:
333 params->have_vga = GRUB_VIDEO_LINUX_TYPE_EFIFB;
336 /* FIXME: check if better id is available. */
337 case GRUB_VIDEO_DRIVER_SM712:
338 case GRUB_VIDEO_DRIVER_SIS315PRO:
339 case GRUB_VIDEO_DRIVER_VGA:
340 case GRUB_VIDEO_DRIVER_CIRRUS:
341 case GRUB_VIDEO_DRIVER_BOCHS:
342 case GRUB_VIDEO_DRIVER_RADEON_FULOONG2E:
343 case GRUB_VIDEO_DRIVER_RADEON_YEELOONG3A:
344 case GRUB_VIDEO_DRIVER_IEEE1275:
345 case GRUB_VIDEO_DRIVER_COREBOOT:
346 /* Make gcc happy. */
347 case GRUB_VIDEO_DRIVER_XEN:
348 case GRUB_VIDEO_DRIVER_SDL:
349 case GRUB_VIDEO_DRIVER_NONE:
350 case GRUB_VIDEO_ADAPTER_CAPTURE:
351 params->have_vga = GRUB_VIDEO_LINUX_TYPE_SIMPLE;
356 #ifdef GRUB_MACHINE_PCBIOS
357 /* VESA packed modes may come with zeroed mask sizes, which need
358 to be set here according to DAC Palette width. If we don't,
359 this results in Linux displaying a black screen. */
360 if (driver_id == GRUB_VIDEO_DRIVER_VBE && mode_info.bpp <= 8)
362 struct grub_vbe_info_block controller_info;
366 status = grub_vbe_bios_get_controller_info (&controller_info);
368 if (status == GRUB_VBE_STATUS_OK &&
369 (controller_info.capabilities & GRUB_VBE_CAPABILITY_DACWIDTH))
370 status = grub_vbe_bios_set_dac_palette_width (&width);
372 if (status != GRUB_VBE_STATUS_OK)
373 /* 6 is default after mode reset. */
376 params->red_mask_size = params->green_mask_size
377 = params->blue_mask_size = width;
378 params->reserved_mask_size = 0;
382 return GRUB_ERR_NONE;
385 /* Context for grub_linux_boot. */
386 struct grub_linux_boot_ctx
388 grub_addr_t real_mode_target;
389 grub_size_t real_size;
390 struct linux_kernel_params *params;
394 /* Helper for grub_linux_boot. */
396 grub_linux_boot_mmap_find (grub_uint64_t addr, grub_uint64_t size,
397 grub_memory_type_t type, void *data)
399 struct grub_linux_boot_ctx *ctx = data;
401 /* We must put real mode code in the traditional space. */
402 if (type != GRUB_MEMORY_AVAILABLE || addr > 0x90000)
405 if (addr + size < 0x10000)
410 size += addr - 0x10000;
414 if (addr + size > 0x90000)
415 size = 0x90000 - addr;
417 if (ctx->real_size + efi_mmap_size > size)
420 grub_dprintf ("linux", "addr = %lx, size = %x, need_size = %x\n",
421 (unsigned long) addr,
423 (unsigned) (ctx->real_size + efi_mmap_size));
424 ctx->real_mode_target = ((addr + size) - (ctx->real_size + efi_mmap_size));
428 /* GRUB types conveniently match E820 types. */
430 grub_linux_boot_mmap_fill (grub_uint64_t addr, grub_uint64_t size,
431 grub_memory_type_t type, void *data)
433 struct grub_linux_boot_ctx *ctx = data;
435 if (grub_e820_add_region (ctx->params->e820_map, &ctx->e820_num,
443 grub_linux_boot (void)
448 struct grub_relocator32_state state;
450 struct grub_linux_boot_ctx ctx = {
451 .real_mode_target = 0
453 grub_size_t mmap_size;
454 grub_size_t cl_offset;
456 #ifdef GRUB_MACHINE_IEEE1275
458 const char *bootpath;
461 bootpath = grub_env_get ("root");
463 grub_ieee1275_set_property (grub_ieee1275_chosen,
464 "bootpath", bootpath,
465 grub_strlen (bootpath) + 1,
467 linux_params.ofw_signature = GRUB_LINUX_OFW_SIGNATURE;
468 linux_params.ofw_num_items = 1;
469 linux_params.ofw_cif_handler = (grub_uint32_t) grub_ieee1275_entry_fn;
470 linux_params.ofw_idt = 0;
474 modevar = grub_env_get ("gfxpayload");
476 /* Now all graphical modes are acceptable.
477 May change in future if we have modes without framebuffer. */
478 if (modevar && *modevar != 0)
480 tmp = grub_xasprintf ("%s;" DEFAULT_VIDEO_MODE, modevar);
483 #if ACCEPTS_PURE_TEXT
484 err = grub_video_set_mode (tmp, 0, 0);
486 err = grub_video_set_mode (tmp, GRUB_VIDEO_MODE_TYPE_PURE_TEXT, 0);
490 else /* We can't go back to text mode from coreboot fb. */
491 #ifdef GRUB_MACHINE_COREBOOT
492 if (grub_video_get_driver_id () == GRUB_VIDEO_DRIVER_COREBOOT)
497 #if ACCEPTS_PURE_TEXT
498 err = grub_video_set_mode (DEFAULT_VIDEO_MODE, 0, 0);
500 err = grub_video_set_mode (DEFAULT_VIDEO_MODE,
501 GRUB_VIDEO_MODE_TYPE_PURE_TEXT, 0);
508 grub_puts_ (N_("Booting in blind mode"));
509 grub_errno = GRUB_ERR_NONE;
512 if (grub_linux_setup_video (&linux_params))
514 #if defined (GRUB_MACHINE_PCBIOS) || defined (GRUB_MACHINE_COREBOOT) || defined (GRUB_MACHINE_QEMU)
515 linux_params.have_vga = GRUB_VIDEO_LINUX_TYPE_TEXT;
516 linux_params.video_mode = 0x3;
518 linux_params.have_vga = 0;
519 linux_params.video_mode = 0;
520 linux_params.video_width = 0;
521 linux_params.video_height = 0;
526 #ifndef GRUB_MACHINE_IEEE1275
527 if (linux_params.have_vga == GRUB_VIDEO_LINUX_TYPE_TEXT)
530 grub_term_output_t term;
532 FOR_ACTIVE_TERM_OUTPUTS(term)
533 if (grub_strcmp (term->name, "vga_text") == 0
534 || grub_strcmp (term->name, "console") == 0
535 || grub_strcmp (term->name, "ofconsole") == 0)
537 struct grub_term_coordinate pos = grub_term_getxy (term);
538 linux_params.video_cursor_x = pos.x;
539 linux_params.video_cursor_y = pos.y;
540 linux_params.video_width = grub_term_width (term);
541 linux_params.video_height = grub_term_height (term);
547 linux_params.video_cursor_x = 0;
548 linux_params.video_cursor_y = 0;
549 linux_params.video_width = 80;
550 linux_params.video_height = 25;
554 mmap_size = find_mmap_size ();
555 /* Make sure that each size is aligned to a page boundary. */
556 cl_offset = ALIGN_UP (mmap_size + sizeof (linux_params), 4096);
557 if (cl_offset < ((grub_size_t) linux_params.setup_sects << GRUB_DISK_SECTOR_BITS))
558 cl_offset = ALIGN_UP ((grub_size_t) (linux_params.setup_sects
559 << GRUB_DISK_SECTOR_BITS), 4096);
560 ctx.real_size = ALIGN_UP (cl_offset + maximal_cmdline_size, 4096);
562 #ifdef GRUB_MACHINE_EFI
563 efi_mmap_size = find_efi_mmap_size ();
564 if (efi_mmap_size == 0)
568 grub_dprintf ("linux", "real_size = %x, mmap_size = %x\n",
569 (unsigned) ctx.real_size, (unsigned) mmap_size);
571 #ifdef GRUB_MACHINE_EFI
572 grub_efi_mmap_iterate (grub_linux_boot_mmap_find, &ctx, 1);
573 if (! ctx.real_mode_target)
574 grub_efi_mmap_iterate (grub_linux_boot_mmap_find, &ctx, 0);
576 grub_mmap_iterate (grub_linux_boot_mmap_find, &ctx);
578 grub_dprintf ("linux", "real_mode_target = %lx, real_size = %x, efi_mmap_size = %x\n",
579 (unsigned long) ctx.real_mode_target,
580 (unsigned) ctx.real_size,
581 (unsigned) efi_mmap_size);
583 if (! ctx.real_mode_target)
584 return grub_error (GRUB_ERR_OUT_OF_MEMORY, "cannot allocate real mode pages");
587 grub_relocator_chunk_t ch;
588 err = grub_relocator_alloc_chunk_addr (relocator, &ch,
589 ctx.real_mode_target,
590 (ctx.real_size + efi_mmap_size));
593 real_mode_mem = get_virtual_current_address (ch);
595 efi_mmap_buf = (grub_uint8_t *) real_mode_mem + ctx.real_size;
597 grub_dprintf ("linux", "real_mode_mem = %p\n",
600 ctx.params = real_mode_mem;
602 *ctx.params = linux_params;
603 ctx.params->cmd_line_ptr = ctx.real_mode_target + cl_offset;
604 grub_memcpy ((char *) ctx.params + cl_offset, linux_cmdline,
605 maximal_cmdline_size);
607 grub_dprintf ("linux", "code32_start = %x\n",
608 (unsigned) ctx.params->code32_start);
611 if (grub_mmap_iterate (grub_linux_boot_mmap_fill, &ctx))
613 ctx.params->mmap_size = ctx.e820_num;
615 #ifdef GRUB_MACHINE_EFI
617 grub_efi_uintn_t efi_desc_size;
618 grub_size_t efi_mmap_target;
619 grub_efi_uint32_t efi_desc_version;
620 err = grub_efi_finish_boot_services (&efi_mmap_size, efi_mmap_buf, NULL,
621 &efi_desc_size, &efi_desc_version);
625 /* Note that no boot services are available from here. */
626 efi_mmap_target = ctx.real_mode_target
627 + ((grub_uint8_t *) efi_mmap_buf - (grub_uint8_t *) real_mode_mem);
628 /* Pass EFI parameters. */
629 if (grub_le_to_cpu16 (ctx.params->version) >= 0x0208)
631 ctx.params->v0208.efi_mem_desc_size = efi_desc_size;
632 ctx.params->v0208.efi_mem_desc_version = efi_desc_version;
633 ctx.params->v0208.efi_mmap = efi_mmap_target;
634 ctx.params->v0208.efi_mmap_size = efi_mmap_size;
637 ctx.params->v0208.efi_mmap_hi = (efi_mmap_target >> 32);
640 else if (grub_le_to_cpu16 (ctx.params->version) >= 0x0206)
642 ctx.params->v0206.efi_mem_desc_size = efi_desc_size;
643 ctx.params->v0206.efi_mem_desc_version = efi_desc_version;
644 ctx.params->v0206.efi_mmap = efi_mmap_target;
645 ctx.params->v0206.efi_mmap_size = efi_mmap_size;
647 else if (grub_le_to_cpu16 (ctx.params->version) >= 0x0204)
649 ctx.params->v0204.efi_mem_desc_size = efi_desc_size;
650 ctx.params->v0204.efi_mem_desc_version = efi_desc_version;
651 ctx.params->v0204.efi_mmap = efi_mmap_target;
652 ctx.params->v0204.efi_mmap_size = efi_mmap_size;
658 /* asm volatile ("lidt %0" : : "m" (idt_desc)); */
659 state.ebp = state.edi = state.ebx = 0;
660 state.esi = ctx.real_mode_target;
661 state.esp = ctx.real_mode_target;
662 state.eip = ctx.params->code32_start;
663 return grub_relocator32_boot (relocator, state, 0);
667 grub_linux_unload (void)
669 grub_dl_unref (my_mod);
671 grub_free (linux_cmdline);
673 return GRUB_ERR_NONE;
677 grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
678 int argc, char *argv[])
680 grub_file_t file = 0;
681 struct linux_i386_kernel_header lh;
682 grub_uint8_t setup_sects;
683 grub_size_t real_size, prot_size, prot_file_size;
686 grub_size_t align, min_align;
688 grub_uint64_t preferred_address = GRUB_LINUX_BZIMAGE_ADDR;
690 grub_dl_ref (my_mod);
694 grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
698 file = grub_file_open (argv[0]);
702 if (grub_file_read (file, &lh, sizeof (lh)) != sizeof (lh))
705 grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
710 if (lh.boot_flag != grub_cpu_to_le16_compile_time (0xaa55))
712 grub_error (GRUB_ERR_BAD_OS, "invalid magic number");
716 if (lh.setup_sects > GRUB_LINUX_MAX_SETUP_SECTS)
718 grub_error (GRUB_ERR_BAD_OS, "too many setup sectors");
722 /* FIXME: 2.03 is not always good enough (Linux 2.4 can be 2.03 and
723 still not support 32-bit boot. */
724 if (lh.header != grub_cpu_to_le32_compile_time (GRUB_LINUX_I386_MAGIC_SIGNATURE)
725 || grub_le_to_cpu16 (lh.version) < 0x0203)
727 grub_error (GRUB_ERR_BAD_OS, "version too old for 32-bit boot"
728 #ifdef GRUB_MACHINE_PCBIOS
729 " (try with `linux16')"
735 if (! (lh.loadflags & GRUB_LINUX_FLAG_BIG_KERNEL))
737 grub_error (GRUB_ERR_BAD_OS, "zImage doesn't support 32-bit boot"
738 #ifdef GRUB_MACHINE_PCBIOS
739 " (try with `linux16')"
745 if (grub_le_to_cpu16 (lh.version) >= 0x0206)
746 maximal_cmdline_size = grub_le_to_cpu32 (lh.cmdline_size) + 1;
748 maximal_cmdline_size = 256;
750 if (maximal_cmdline_size < 128)
751 maximal_cmdline_size = 128;
753 setup_sects = lh.setup_sects;
755 /* If SETUP_SECTS is not set, set it to the default (4). */
757 setup_sects = GRUB_LINUX_DEFAULT_SETUP_SECTS;
759 real_size = setup_sects << GRUB_DISK_SECTOR_BITS;
760 prot_file_size = grub_file_size (file) - real_size - GRUB_DISK_SECTOR_SIZE;
762 if (grub_le_to_cpu16 (lh.version) >= 0x205
763 && lh.kernel_alignment != 0
764 && ((lh.kernel_alignment - 1) & lh.kernel_alignment) == 0)
766 for (align = 0; align < 32; align++)
767 if (grub_le_to_cpu32 (lh.kernel_alignment) & (1 << align))
769 relocatable = grub_le_to_cpu32 (lh.relocatable);
777 if (grub_le_to_cpu16 (lh.version) >= 0x020a)
779 min_align = lh.min_alignment;
780 prot_size = grub_le_to_cpu32 (lh.init_size);
781 prot_init_space = page_align (prot_size);
783 preferred_address = grub_le_to_cpu64 (lh.pref_address);
785 preferred_address = GRUB_LINUX_BZIMAGE_ADDR;
790 prot_size = prot_file_size;
791 preferred_address = GRUB_LINUX_BZIMAGE_ADDR;
792 /* Usually, the compression ratio is about 50%. */
793 prot_init_space = page_align (prot_size) * 3;
796 if (allocate_pages (prot_size, &align,
797 min_align, relocatable,
801 grub_memset (&linux_params, 0, sizeof (linux_params));
802 grub_memcpy (&linux_params.setup_sects, &lh.setup_sects, sizeof (lh) - 0x1F1);
804 linux_params.code32_start = prot_mode_target + lh.code32_start - GRUB_LINUX_BZIMAGE_ADDR;
805 linux_params.kernel_alignment = (1 << align);
806 linux_params.ps_mouse = linux_params.padding10 = 0;
808 len = sizeof (linux_params) - sizeof (lh);
809 if (grub_file_read (file, (char *) &linux_params + sizeof (lh), len) != len)
812 grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
817 linux_params.type_of_loader = GRUB_LINUX_BOOT_LOADER_TYPE;
819 /* These two are used (instead of cmd_line_ptr) by older versions of Linux,
820 and otherwise ignored. */
821 linux_params.cl_magic = GRUB_LINUX_CL_MAGIC;
822 linux_params.cl_offset = 0x1000;
824 linux_params.ramdisk_image = 0;
825 linux_params.ramdisk_size = 0;
827 linux_params.heap_end_ptr = GRUB_LINUX_HEAP_END_OFFSET;
828 linux_params.loadflags |= GRUB_LINUX_FLAG_CAN_USE_HEAP;
830 /* These are not needed to be precise, because Linux uses these values
831 only to raise an error when the decompression code cannot find good
833 linux_params.ext_mem = ((32 * 0x100000) >> 10);
834 linux_params.alt_mem = ((32 * 0x100000) >> 10);
836 /* Ignored by Linux. */
837 linux_params.video_page = 0;
839 /* Only used when `video_mode == 0x7', otherwise ignored. */
840 linux_params.video_ega_bx = 0;
842 linux_params.font_size = 16; /* XXX */
844 #ifdef GRUB_MACHINE_EFI
846 if (grub_le_to_cpu16 (linux_params.version) < 0x0208 &&
847 ((grub_addr_t) grub_efi_system_table >> 32) != 0)
848 return grub_error(GRUB_ERR_BAD_OS,
849 "kernel does not support 64-bit addressing");
852 if (grub_le_to_cpu16 (linux_params.version) >= 0x0208)
854 linux_params.v0208.efi_signature = GRUB_LINUX_EFI_SIGNATURE;
855 linux_params.v0208.efi_system_table = (grub_uint32_t) (grub_addr_t) grub_efi_system_table;
857 linux_params.v0208.efi_system_table_hi = (grub_uint32_t) ((grub_uint64_t) grub_efi_system_table >> 32);
860 else if (grub_le_to_cpu16 (linux_params.version) >= 0x0206)
862 linux_params.v0206.efi_signature = GRUB_LINUX_EFI_SIGNATURE;
863 linux_params.v0206.efi_system_table = (grub_uint32_t) (grub_addr_t) grub_efi_system_table;
865 else if (grub_le_to_cpu16 (linux_params.version) >= 0x0204)
867 linux_params.v0204.efi_signature = GRUB_LINUX_EFI_SIGNATURE_0204;
868 linux_params.v0204.efi_system_table = (grub_uint32_t) (grub_addr_t) grub_efi_system_table;
872 /* The other parameters are filled when booting. */
874 grub_file_seek (file, real_size + GRUB_DISK_SECTOR_SIZE);
876 grub_dprintf ("linux", "bzImage, setup=0x%x, size=0x%x\n",
877 (unsigned) real_size, (unsigned) prot_size);
879 /* Look for memory size and video mode specified on the command line. */
881 for (i = 1; i < argc; i++)
882 #ifdef GRUB_MACHINE_PCBIOS
883 if (grub_memcmp (argv[i], "vga=", 4) == 0)
885 /* Video mode selection support. */
886 char *val = argv[i] + 4;
887 unsigned vid_mode = GRUB_LINUX_VID_MODE_NORMAL;
888 struct grub_vesa_mode_table_entry *linux_mode;
892 grub_dl_load ("vbe");
894 if (grub_strcmp (val, "normal") == 0)
895 vid_mode = GRUB_LINUX_VID_MODE_NORMAL;
896 else if (grub_strcmp (val, "ext") == 0)
897 vid_mode = GRUB_LINUX_VID_MODE_EXTENDED;
898 else if (grub_strcmp (val, "ask") == 0)
900 grub_puts_ (N_("Legacy `ask' parameter no longer supported."));
902 /* We usually would never do this in a loader, but "vga=ask" means user
903 requested interaction, so it can't hurt to request keyboard input. */
904 grub_wait_after_message ();
909 vid_mode = (grub_uint16_t) grub_strtoul (val, 0, 0);
914 case GRUB_LINUX_VID_MODE_NORMAL:
915 grub_env_set ("gfxpayload", "text");
916 grub_printf_ (N_("%s is deprecated. "
917 "Use set gfxpayload=%s before "
918 "linux command instead.\n"),
923 case GRUB_LINUX_VID_MODE_EXTENDED:
924 /* FIXME: support 80x50 text. */
925 grub_env_set ("gfxpayload", "text");
926 grub_printf_ (N_("%s is deprecated. "
927 "Use set gfxpayload=%s before "
928 "linux command instead.\n"),
932 /* Ignore invalid values. */
933 if (vid_mode < GRUB_VESA_MODE_TABLE_START ||
934 vid_mode > GRUB_VESA_MODE_TABLE_END)
936 grub_env_set ("gfxpayload", "text");
937 /* TRANSLATORS: "x" has to be entered in, like an identifier,
938 so please don't use better Unicode codepoints. */
939 grub_printf_ (N_("%s is deprecated. VGA mode %d isn't recognized. "
940 "Use set gfxpayload=WIDTHxHEIGHT[xDEPTH] "
941 "before linux command instead.\n"),
946 linux_mode = &grub_vesa_mode_table[vid_mode
947 - GRUB_VESA_MODE_TABLE_START];
949 buf = grub_xasprintf ("%ux%ux%u,%ux%u",
950 linux_mode->width, linux_mode->height,
952 linux_mode->width, linux_mode->height);
956 grub_printf_ (N_("%s is deprecated. "
957 "Use set gfxpayload=%s before "
958 "linux command instead.\n"),
960 err = grub_env_set ("gfxpayload", buf);
967 #endif /* GRUB_MACHINE_PCBIOS */
968 if (grub_memcmp (argv[i], "mem=", 4) == 0)
970 char *val = argv[i] + 4;
972 linux_mem_size = grub_strtoul (val, &val, 0);
976 grub_errno = GRUB_ERR_NONE;
983 switch (grub_tolower (val[0]))
998 /* Check an overflow. */
999 if (linux_mem_size > (~0UL >> shift))
1002 linux_mem_size <<= shift;
1005 else if (grub_memcmp (argv[i], "quiet", sizeof ("quiet") - 1) == 0)
1007 linux_params.loadflags |= GRUB_LINUX_FLAG_QUIET;
1010 /* Create kernel command line. */
1011 linux_cmdline = grub_zalloc (maximal_cmdline_size + 1);
1014 grub_memcpy (linux_cmdline, LINUX_IMAGE, sizeof (LINUX_IMAGE));
1015 grub_create_loader_cmdline (argc, argv,
1017 + sizeof (LINUX_IMAGE) - 1,
1018 maximal_cmdline_size
1019 - (sizeof (LINUX_IMAGE) - 1));
1021 len = prot_file_size;
1022 if (grub_file_read (file, prot_mode_mem, len) != len && !grub_errno)
1023 grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
1026 if (grub_errno == GRUB_ERR_NONE)
1028 grub_loader_set (grub_linux_boot, grub_linux_unload,
1029 0 /* set noreturn=0 in order to avoid grub_console_fini() */);
1036 grub_file_close (file);
1038 if (grub_errno != GRUB_ERR_NONE)
1040 grub_dl_unref (my_mod);
1048 grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
1049 int argc, char *argv[])
1051 grub_size_t size = 0, aligned_size = 0;
1052 grub_addr_t addr_min, addr_max;
1055 struct grub_linux_initrd_context initrd_ctx = { 0, 0, 0 };
1059 grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
1065 grub_error (GRUB_ERR_BAD_ARGUMENT, N_("you need to load the kernel first"));
1069 if (grub_initrd_init (argc, argv, &initrd_ctx))
1072 size = grub_get_initrd_size (&initrd_ctx);
1073 aligned_size = ALIGN_UP (size, 4096);
1075 /* Get the highest address available for the initrd. */
1076 if (grub_le_to_cpu16 (linux_params.version) >= 0x0203)
1078 addr_max = grub_cpu_to_le32 (linux_params.initrd_addr_max);
1080 /* XXX in reality, Linux specifies a bogus value, so
1081 it is necessary to make sure that ADDR_MAX does not exceed
1083 if (addr_max > GRUB_LINUX_INITRD_MAX_ADDRESS)
1084 addr_max = GRUB_LINUX_INITRD_MAX_ADDRESS;
1087 addr_max = GRUB_LINUX_INITRD_MAX_ADDRESS;
1089 if (linux_mem_size != 0 && linux_mem_size < addr_max)
1090 addr_max = linux_mem_size;
1092 /* Linux 2.3.xx has a bug in the memory range check, so avoid
1094 Linux 2.2.xx has a bug in the memory range check, which is
1095 worse than that of Linux 2.3.xx, so avoid the last 64kb. */
1096 addr_max -= 0x10000;
1098 addr_min = (grub_addr_t) prot_mode_target + prot_init_space;
1100 /* Put the initrd as high as possible, 4KiB aligned. */
1101 addr = (addr_max - aligned_size) & ~0xFFF;
1103 if (addr < addr_min)
1105 grub_error (GRUB_ERR_OUT_OF_RANGE, "the initrd is too big");
1110 grub_relocator_chunk_t ch;
1111 err = grub_relocator_alloc_chunk_align (relocator, &ch,
1112 addr_min, addr, aligned_size,
1114 GRUB_RELOCATOR_PREFERENCE_HIGH,
1118 initrd_mem = get_virtual_current_address (ch);
1119 initrd_mem_target = get_physical_target_address (ch);
1122 if (grub_initrd_load (&initrd_ctx, argv, initrd_mem))
1125 grub_dprintf ("linux", "Initrd, addr=0x%x, size=0x%x\n",
1126 (unsigned) addr, (unsigned) size);
1128 linux_params.ramdisk_image = initrd_mem_target;
1129 linux_params.ramdisk_size = size;
1130 linux_params.root_dev = 0x0100; /* XXX */
1133 grub_initrd_close (&initrd_ctx);
1138 static grub_command_t cmd_linux, cmd_initrd;
1140 GRUB_MOD_INIT(linux)
1142 cmd_linux = grub_register_command ("linux", grub_cmd_linux,
1143 0, N_("Load Linux."));
1144 cmd_initrd = grub_register_command ("initrd", grub_cmd_initrd,
1145 0, N_("Load initrd."));
1149 GRUB_MOD_FINI(linux)
1151 grub_unregister_command (cmd_linux);
1152 grub_unregister_command (cmd_initrd);