2006-05-28 Yoshinori K. Okuji <okuji@enbug.org>
* fs/hfsplus.c (grub_hfsplus_btree_recoffset): Moved to near the
top.
(grub_hfsplus_btree_recptr): Likewise.
(grub_hfsplus_find_block): Do not take RETRY any longer. Use
FILEBLOCK both to pass a block number and store next block
number.
(grub_hfsplus_read_block): Rewritten heavily to support an extent
overflow file correctly. Specify errors appropriately, because
fshelp expects that GRUB_ERRNO is set when fails. Reuse
grub_hfsplus_btree_recptr to get the pointer to a found key.
(grub_hfsplus_btree_search): Return 1 instead of 0 when no match
is found.
* conf/i386-efi.rmk (pkgdata_MODULES): Added _linux.mod and
linux.mod.
(_linux_mod_SOURCES): New variable.
(_linux_mod_CFLAGS): Likewise.
(_linux_mod_LDFLAGS): Likewise.
(linux_mod_SOURCES): Likewise.
(linux_mod_CFLAGS): Likewise.
(linux_mod_LDFLAGS): Likewise.
* DISTLIST: Added loader/i386/efi/linux.c,
loader/i386/efi/linux_normal.c and
include/grub/i386/efi/loader.h.
* loader/i386/efi/linux.c: New file.
* loader/i386/efi/linux_normal.c: Likewise.
* include/grub/i386/efi/loader.h: Likewise.
This commit is contained in:
okuji
parent
43b553ada7
commit
118f4fb31e
9 changed files with 1022 additions and 58 deletions
688
loader/i386/efi/linux.c
Normal file
688
loader/i386/efi/linux.c
Normal file
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@ -0,0 +1,688 @@
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2006 Free Software Foundation, Inc.
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <grub/loader.h>
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#include <grub/machine/loader.h>
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#include <grub/file.h>
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#include <grub/disk.h>
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#include <grub/err.h>
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#include <grub/misc.h>
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#include <grub/types.h>
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#include <grub/rescue.h>
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#include <grub/dl.h>
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#include <grub/mm.h>
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#include <grub/term.h>
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#include <grub/cpu/linux.h>
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#include <grub/efi/api.h>
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#include <grub/efi/efi.h>
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#define NEXT_MEMORY_DESCRIPTOR(desc, size) \
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((grub_efi_memory_descriptor_t *) ((char *) (desc) + (size)))
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static grub_dl_t my_mod;
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static grub_size_t linux_mem_size;
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static int loaded;
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static void *real_mode_mem;
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static void *prot_mode_mem;
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static void *initrd_mem;
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static grub_efi_uintn_t real_mode_pages;
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static grub_efi_uintn_t prot_mode_pages;
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static grub_efi_uintn_t initrd_pages;
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static void *mmap_buf;
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static grub_uint8_t gdt[] __attribute__ ((aligned(16))) =
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{
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/* NULL. */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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/* Reserved. */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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/* Code segment. */
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0xFF, 0xFF, 0x00, 0x00, 0x00, 0x9A, 0xCF, 0x00,
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/* Data segment. */
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0xFF, 0xFF, 0x00, 0x00, 0x00, 0x92, 0xCF, 0x00
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};
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struct gdt_descriptor
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{
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grub_uint16_t dummy;
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grub_uint16_t limit;
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grub_uint32_t base;
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} __attribute__ ((aligned(4), packed));
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static struct gdt_descriptor gdt_desc =
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{
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0,
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sizeof (gdt) - 1,
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(grub_addr_t) gdt
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};
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struct idt_descriptor
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{
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grub_uint16_t dummy;
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grub_uint16_t limit;
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grub_uint32_t base;
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} __attribute__ ((aligned(4)));
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static struct idt_descriptor idt_desc =
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{
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0,
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0,
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0
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};
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static inline grub_size_t
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page_align (grub_size_t size)
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{
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return (size + (1 << 12) - 1) & (~((1 << 12) - 1));
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}
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/* Find the optimal number of pages for the memory map. Is it better to
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move this code to efi/mm.c? */
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static grub_efi_uintn_t
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find_mmap_size (void)
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{
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static grub_efi_uintn_t mmap_size = 0;
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if (mmap_size != 0)
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return mmap_size;
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mmap_size = (1 << 12);
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while (1)
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{
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int ret;
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grub_efi_memory_descriptor_t *mmap;
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grub_efi_uintn_t desc_size;
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mmap = grub_malloc (mmap_size);
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if (! mmap)
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return 0;
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ret = grub_efi_get_memory_map (&mmap_size, mmap, 0, &desc_size, 0);
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grub_free (mmap);
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if (ret < 0)
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grub_fatal ("cannot get memory map");
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else if (ret > 0)
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break;
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mmap_size += (1 << 12);
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}
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/* Increase the size a bit for safety, because GRUB allocates more on
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later, and EFI itself may allocate more. */
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mmap_size += (1 << 12);
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return page_align (mmap_size);
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}
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static void
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free_pages (void)
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{
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if (real_mode_mem)
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{
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grub_efi_free_pages ((grub_addr_t) real_mode_mem, real_mode_pages);
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real_mode_mem = 0;
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}
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if (prot_mode_mem)
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{
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grub_efi_free_pages ((grub_addr_t) prot_mode_mem, prot_mode_pages);
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prot_mode_mem = 0;
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}
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if (initrd_mem)
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{
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grub_efi_free_pages ((grub_addr_t) initrd_mem, initrd_pages);
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initrd_mem = 0;
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}
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}
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/* Allocate pages for the real mode code and the protected mode code
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for linux as well as a memory map buffer. */
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static int
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allocate_pages (grub_size_t real_size, grub_size_t prot_size)
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{
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grub_efi_uintn_t desc_size;
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grub_efi_memory_descriptor_t *mmap, *mmap_end;
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grub_efi_uintn_t mmap_size, tmp_mmap_size;
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grub_efi_memory_descriptor_t *desc;
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/* Make sure that each size is aligned to a page boundary. */
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real_size = page_align (real_size + GRUB_DISK_SECTOR_SIZE);
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prot_size = page_align (prot_size);
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mmap_size = find_mmap_size ();
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grub_dprintf ("linux", "real_size = %x, prot_size = %x, mmap_size = %x\n",
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real_size, prot_size, mmap_size);
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/* Calculate the number of pages; Combine the real mode code with
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the memory map buffer for simplicity. */
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real_mode_pages = ((real_size + mmap_size) >> 12);
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prot_mode_pages = (prot_size >> 12);
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/* Initialize the memory pointers with NULL for convenience. */
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real_mode_mem = 0;
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prot_mode_mem = 0;
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/* Read the memory map temporarily, to find free space. */
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mmap = grub_malloc (mmap_size);
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if (! mmap)
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return 0;
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tmp_mmap_size = mmap_size;
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if (grub_efi_get_memory_map (&tmp_mmap_size, mmap, 0, &desc_size, 0) <= 0)
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grub_fatal ("cannot get memory map");
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mmap_end = NEXT_MEMORY_DESCRIPTOR (mmap, tmp_mmap_size);
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/* First, find free pages for the real mode code
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and the memory map buffer. */
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for (desc = mmap;
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desc < mmap_end;
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desc = NEXT_MEMORY_DESCRIPTOR (desc, desc_size))
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{
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/* Probably it is better to put the real mode code in the traditional
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space for safety. */
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if (desc->type == GRUB_EFI_CONVENTIONAL_MEMORY
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&& desc->physical_start <= 0x90000
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&& desc->num_pages >= real_mode_pages)
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{
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grub_efi_physical_address_t physical_end;
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grub_efi_physical_address_t addr;
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physical_end = desc->physical_start + (desc->num_pages << 12);
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if (physical_end > 0x90000)
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physical_end = 0x90000;
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grub_dprintf ("linux", "physical_start = %x, physical_end = %x\n",
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(unsigned) desc->physical_start,
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(unsigned) physical_end);
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addr = physical_end - real_size - mmap_size;
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if (addr < 0x10000)
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continue;
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grub_dprintf ("linux", "trying to allocate %u pages at %x\n",
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real_mode_pages, (unsigned) addr);
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real_mode_mem = grub_efi_allocate_pages (addr, real_mode_pages);
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if (! real_mode_mem)
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grub_fatal ("cannot allocate pages");
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desc->num_pages -= real_mode_pages;
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break;
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}
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}
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if (! real_mode_mem)
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{
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grub_error (GRUB_ERR_OUT_OF_MEMORY, "cannot allocate real mode pages");
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goto fail;
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}
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mmap_buf = (void *) ((char *) real_mode_mem + real_size);
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/* Next, find free pages for the protected mode code. */
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/* XXX what happens if anything is using this address? */
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prot_mode_mem = grub_efi_allocate_pages (0x100000, prot_mode_pages);
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if (! prot_mode_mem)
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{
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grub_error (GRUB_ERR_OUT_OF_MEMORY,
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"cannot allocate protected mode pages");
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goto fail;
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}
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grub_free (mmap);
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return 1;
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fail:
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grub_free (mmap);
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free_pages ();
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return 0;
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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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struct linux_kernel_header *lh;
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struct linux_kernel_params *params;
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grub_efi_uintn_t mmap_size;
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grub_efi_uintn_t map_key;
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grub_efi_uintn_t desc_size;
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grub_efi_uint32_t desc_version;
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lh = real_mode_mem;
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params = real_mode_mem;
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grub_dprintf ("linux", "code32_start = %x, idt_desc = %x, gdt_desc = %x\n",
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(unsigned) lh->code32_start, (grub_addr_t) &(idt_desc.limit),
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(grub_addr_t) &(gdt_desc.limit));
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grub_dprintf ("linux", "idt = %x:%x, gdt = %x:%x\n",
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(unsigned) idt_desc.limit, (unsigned) idt_desc.base,
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(unsigned) gdt_desc.limit, (unsigned) gdt_desc.base);
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mmap_size = find_mmap_size ();
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if (grub_efi_get_memory_map (&mmap_size, mmap_buf, &map_key,
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&desc_size, &desc_version) <= 0)
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grub_fatal ("cannot get memory map");
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if (! grub_efi_exit_boot_services (map_key))
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grub_fatal ("cannot exit boot services");
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/* Note that no boot services are available from here. */
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/* Hardware interrupts are not safe any longer. */
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asm volatile ("cli" : : );
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/* Pass EFI parameters. */
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params->efi_mem_desc_size = desc_size;
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params->efi_mem_desc_version = desc_version;
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params->efi_mmap = (grub_addr_t) mmap_buf;
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params->efi_mmap_size = mmap_size;
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/* Pass parameters. */
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asm volatile ("movl %0, %%esi" : : "m" (real_mode_mem));
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asm volatile ("movl %0, %%ecx" : : "m" (lh->code32_start));
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asm volatile ("xorl %%ebx, %%ebx" : : );
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/* Load the IDT and the GDT for the bootstrap. */
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asm volatile ("lidt %0" : : "m" (idt_desc.limit));
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asm volatile ("lgdt %0" : : "m" (gdt_desc.limit));
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/* Enter Linux. */
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asm volatile ("jmp *%%ecx" : : );
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/* Never reach here. */
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return GRUB_ERR_NONE;
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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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free_pages ();
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grub_dl_unref (my_mod);
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loaded = 0;
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return GRUB_ERR_NONE;
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}
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void
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grub_rescue_cmd_linux (int argc, char *argv[])
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{
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grub_file_t file = 0;
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struct linux_kernel_header lh;
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struct linux_kernel_params *params;
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grub_uint8_t setup_sects;
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grub_size_t real_size, prot_size;
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grub_ssize_t len;
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int i;
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char *dest;
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grub_dl_ref (my_mod);
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|
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if (argc == 0)
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{
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grub_error (GRUB_ERR_BAD_ARGUMENT, "no kernel specified");
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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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|
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if (grub_file_read (file, (char *) &lh, sizeof (lh)) != sizeof (lh))
|
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{
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grub_error (GRUB_ERR_READ_ERROR, "cannot read the linux header");
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goto fail;
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}
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|
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if (lh.boot_flag != grub_cpu_to_le16 (0xaa55))
|
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{
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grub_error (GRUB_ERR_BAD_OS, "invalid magic number");
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goto fail;
|
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}
|
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|
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if (lh.setup_sects > GRUB_LINUX_MAX_SETUP_SECTS)
|
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{
|
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grub_error (GRUB_ERR_BAD_OS, "too many setup sectors");
|
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goto fail;
|
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}
|
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|
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/* EFI support is quite new, so reject old versions. */
|
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if (lh.header != grub_cpu_to_le32 (GRUB_LINUX_MAGIC_SIGNATURE)
|
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|| grub_le_to_cpu16 (lh.version) < 0x0203)
|
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{
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grub_error (GRUB_ERR_BAD_OS, "too old version");
|
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goto fail;
|
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}
|
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|
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/* I'm not sure how to support zImage on EFI. */
|
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if (! (lh.loadflags & GRUB_LINUX_FLAG_BIG_KERNEL))
|
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{
|
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grub_error (GRUB_ERR_BAD_OS, "zImage is not supported");
|
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goto fail;
|
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}
|
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|
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setup_sects = lh.setup_sects;
|
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|
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/* If SETUP_SECTS is not set, set it to the default (4). */
|
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if (! setup_sects)
|
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setup_sects = GRUB_LINUX_DEFAULT_SETUP_SECTS;
|
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|
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real_size = setup_sects << GRUB_DISK_SECTOR_BITS;
|
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prot_size = grub_file_size (file) - real_size - GRUB_DISK_SECTOR_SIZE;
|
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|
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if (! allocate_pages (real_size, prot_size))
|
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goto fail;
|
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|
||||
/* XXX Linux assumes that only elilo can boot Linux on EFI!!! */
|
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lh.type_of_loader = 0x50;
|
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|
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lh.cl_magic = GRUB_LINUX_CL_MAGIC;
|
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lh.cl_offset = GRUB_LINUX_CL_END_OFFSET;
|
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lh.cmd_line_ptr = (char *) real_mode_mem + GRUB_LINUX_CL_OFFSET;
|
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lh.ramdisk_image = 0;
|
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lh.ramdisk_size = 0;
|
||||
|
||||
params = (struct linux_kernel_params *) &lh;
|
||||
|
||||
/* These are not needed to be precise, because Linux uses these values
|
||||
only to raise an error when the decompression code cannot find good
|
||||
space. */
|
||||
params->ext_mem = ((32 * 0x100000) >> 10);
|
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params->alt_mem = ((32 * 0x100000) >> 10);
|
||||
|
||||
params->video_cursor_x = grub_efi_system_table->con_out->mode->cursor_column;
|
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params->video_cursor_y = grub_efi_system_table->con_out->mode->cursor_row;
|
||||
params->video_page = 0; /* ??? */
|
||||
params->video_mode = grub_efi_system_table->con_out->mode->mode;
|
||||
params->video_width = (grub_getwh () >> 8);
|
||||
params->video_ega_bx = 0;
|
||||
params->video_height = (grub_getwh () & 0xff);
|
||||
params->have_vga = 0;
|
||||
params->font_size = 16; /* XXX */
|
||||
|
||||
/* No VBE on EFI. */
|
||||
params->lfb_width = 0;
|
||||
params->lfb_height = 0;
|
||||
params->lfb_depth = 0;
|
||||
params->lfb_base = 0;
|
||||
params->lfb_size = 0;
|
||||
params->lfb_line_len = 0;
|
||||
params->red_mask_size = 0;
|
||||
params->red_field_pos = 0;
|
||||
params->green_mask_size = 0;
|
||||
params->green_field_pos = 0;
|
||||
params->blue_mask_size = 0;
|
||||
params->blue_field_pos = 0;
|
||||
params->reserved_mask_size = 0;
|
||||
params->reserved_field_pos = 0;
|
||||
params->vesapm_segment = 0;
|
||||
params->vesapm_offset = 0;
|
||||
params->lfb_pages = 0;
|
||||
params->vesa_attrib = 0;
|
||||
|
||||
/* No APM on EFI. */
|
||||
params->apm_version = 0;
|
||||
params->apm_code_segment = 0;
|
||||
params->apm_entry = 0;
|
||||
params->apm_16bit_code_segment = 0;
|
||||
params->apm_data_segment = 0;
|
||||
params->apm_flags = 0;
|
||||
params->apm_code_len = 0;
|
||||
params->apm_data_len = 0;
|
||||
|
||||
/* XXX is there any way to use SpeedStep on EFI? */
|
||||
params->ist_signature = 0;
|
||||
params->ist_command = 0;
|
||||
params->ist_event = 0;
|
||||
params->ist_perf_level = 0;
|
||||
|
||||
/* Let the kernel probe the information. */
|
||||
grub_memset (params->hd0_drive_info, 0, sizeof (params->hd0_drive_info));
|
||||
grub_memset (params->hd1_drive_info, 0, sizeof (params->hd1_drive_info));
|
||||
|
||||
/* No MCA on EFI. */
|
||||
params->rom_config_len = 0;
|
||||
|
||||
params->efi_signature = GRUB_LINUX_EFI_SIGNATURE; /* XXX not used */
|
||||
params->efi_system_table = (grub_addr_t) grub_efi_system_table;
|
||||
/* The other EFI parameters are filled when booting. */
|
||||
|
||||
/* No need to fake the BIOS's memory map. */
|
||||
params->mmap_size = 0;
|
||||
|
||||
/* Let the kernel probe the information. */
|
||||
params->ps_mouse = 0;
|
||||
|
||||
/* Clear padding for future compatibility. */
|
||||
grub_memset (params->padding1, 0, sizeof (params->padding1));
|
||||
grub_memset (params->padding2, 0, sizeof (params->padding2));
|
||||
grub_memset (params->padding3, 0, sizeof (params->padding3));
|
||||
grub_memset (params->padding4, 0, sizeof (params->padding4));
|
||||
grub_memset (params->padding5, 0, sizeof (params->padding5));
|
||||
grub_memset (params->padding6, 0, sizeof (params->padding6));
|
||||
grub_memset (params->padding7, 0, sizeof (params->padding7));
|
||||
grub_memset (params->padding8, 0, sizeof (params->padding8));
|
||||
grub_memset (params->padding9, 0, sizeof (params->padding9));
|
||||
|
||||
/* Put the real mode code at the real location. */
|
||||
grub_memmove (real_mode_mem, &lh, sizeof (lh));
|
||||
|
||||
len = real_size + GRUB_DISK_SECTOR_SIZE - sizeof (lh);
|
||||
if (grub_file_read (file, (char *) real_mode_mem + sizeof (lh), len) != len)
|
||||
{
|
||||
grub_error (GRUB_ERR_FILE_READ_ERROR, "Couldn't read file");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
/* XXX there is no way to know if the kernel really supports EFI. */
|
||||
grub_printf (" [Linux-EFI, setup=0x%x, size=0x%x]\n",
|
||||
real_size, prot_size);
|
||||
|
||||
/* Detect explicitly specified memory size, if any. */
|
||||
linux_mem_size = 0;
|
||||
for (i = 1; i < argc; i++)
|
||||
if (grub_memcmp (argv[i], "mem=", 4) == 0)
|
||||
{
|
||||
char *val = argv[i] + 4;
|
||||
|
||||
linux_mem_size = grub_strtoul (val, &val, 0);
|
||||
|
||||
if (grub_errno)
|
||||
{
|
||||
grub_errno = GRUB_ERR_NONE;
|
||||
linux_mem_size = 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
int shift = 0;
|
||||
|
||||
switch (grub_tolower (val[0]))
|
||||
{
|
||||
case 'g':
|
||||
shift += 10;
|
||||
case 'm':
|
||||
shift += 10;
|
||||
case 'k':
|
||||
shift += 10;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
/* Check an overflow. */
|
||||
if (linux_mem_size > (~0UL >> shift))
|
||||
linux_mem_size = 0;
|
||||
else
|
||||
linux_mem_size <<= shift;
|
||||
}
|
||||
}
|
||||
|
||||
/* Specify the boot file. */
|
||||
dest = grub_stpcpy ((char *) real_mode_mem + GRUB_LINUX_CL_OFFSET,
|
||||
"BOOT_IMAGE=");
|
||||
dest = grub_stpcpy (dest, argv[0]);
|
||||
|
||||
/* Copy kernel parameters. */
|
||||
for (i = 1;
|
||||
i < argc
|
||||
&& dest + grub_strlen (argv[i]) + 1 < ((char *) real_mode_mem
|
||||
+ GRUB_LINUX_CL_END_OFFSET);
|
||||
i++)
|
||||
{
|
||||
*dest++ = ' ';
|
||||
dest = grub_stpcpy (dest, argv[i]);
|
||||
}
|
||||
|
||||
len = prot_size;
|
||||
if (grub_file_read (file, (char *) GRUB_LINUX_BZIMAGE_ADDR, len) != len)
|
||||
grub_error (GRUB_ERR_FILE_READ_ERROR, "Couldn't read file");
|
||||
|
||||
if (grub_errno == GRUB_ERR_NONE)
|
||||
{
|
||||
grub_loader_set (grub_linux_boot, grub_linux_unload, 1);
|
||||
loaded = 1;
|
||||
}
|
||||
|
||||
fail:
|
||||
|
||||
if (file)
|
||||
grub_file_close (file);
|
||||
|
||||
if (grub_errno != GRUB_ERR_NONE)
|
||||
{
|
||||
grub_dl_unref (my_mod);
|
||||
loaded = 0;
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
grub_rescue_cmd_initrd (int argc, char *argv[])
|
||||
{
|
||||
grub_file_t file = 0;
|
||||
grub_ssize_t size;
|
||||
grub_addr_t addr_min, addr_max;
|
||||
grub_addr_t addr;
|
||||
grub_efi_uintn_t mmap_size;
|
||||
grub_efi_memory_descriptor_t *desc;
|
||||
grub_efi_uintn_t desc_size;
|
||||
struct linux_kernel_header *lh;
|
||||
|
||||
if (argc == 0)
|
||||
{
|
||||
grub_error (GRUB_ERR_BAD_ARGUMENT, "No module specified");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
if (! loaded)
|
||||
{
|
||||
grub_error (GRUB_ERR_BAD_ARGUMENT, "You need to load the kernel first.");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
file = grub_file_open (argv[0]);
|
||||
if (! file)
|
||||
goto fail;
|
||||
|
||||
size = grub_file_size (file);
|
||||
initrd_pages = (page_align (size) >> 12);
|
||||
|
||||
lh = (struct linux_kernel_header *) real_mode_mem;
|
||||
|
||||
addr_max = grub_cpu_to_le32 (lh->initrd_addr_max);
|
||||
if (linux_mem_size != 0 && linux_mem_size < addr_max)
|
||||
addr_max = linux_mem_size;
|
||||
|
||||
/* Linux 2.3.xx has a bug in the memory range check, so avoid
|
||||
the last page.
|
||||
Linux 2.2.xx has a bug in the memory range check, which is
|
||||
worse than that of Linux 2.3.xx, so avoid the last 64kb. */
|
||||
addr_max -= 0x10000;
|
||||
|
||||
/* Usually, the compression ratio is about 50%. */
|
||||
addr_min = (grub_addr_t) prot_mode_mem + ((prot_mode_pages * 3) << 12);
|
||||
|
||||
/* Find the highest address to put the initrd. */
|
||||
mmap_size = find_mmap_size ();
|
||||
if (grub_efi_get_memory_map (&mmap_size, mmap_buf, 0, &desc_size, 0) <= 0)
|
||||
grub_fatal ("cannot get memory map");
|
||||
|
||||
addr = 0;
|
||||
for (desc = mmap_buf;
|
||||
desc < NEXT_MEMORY_DESCRIPTOR (mmap_buf, mmap_size);
|
||||
desc = NEXT_MEMORY_DESCRIPTOR (desc, desc_size))
|
||||
{
|
||||
if (desc->type == GRUB_EFI_CONVENTIONAL_MEMORY
|
||||
&& desc->physical_start >= addr_min
|
||||
&& desc->physical_start + size < addr_max
|
||||
&& desc->num_pages >= initrd_pages)
|
||||
{
|
||||
grub_efi_physical_address_t physical_end;
|
||||
|
||||
physical_end = desc->physical_start + (desc->num_pages << 12);
|
||||
if (physical_end > addr_max)
|
||||
physical_end = addr_max;
|
||||
|
||||
if (physical_end > addr)
|
||||
addr = physical_end - page_align (size);
|
||||
}
|
||||
}
|
||||
|
||||
if (addr == 0)
|
||||
{
|
||||
grub_error (GRUB_ERR_OUT_OF_MEMORY, "no free pages available");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
initrd_mem = grub_efi_allocate_pages (addr, initrd_pages);
|
||||
if (! initrd_mem)
|
||||
grub_fatal ("cannot allocate pages");
|
||||
|
||||
if (grub_file_read (file, initrd_mem, size) != size)
|
||||
{
|
||||
grub_error (GRUB_ERR_FILE_READ_ERROR, "Couldn't read file");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
grub_printf (" [Initrd, addr=0x%x, size=0x%x]\n",
|
||||
addr, size);
|
||||
|
||||
lh->ramdisk_image = addr;
|
||||
lh->ramdisk_size = size;
|
||||
lh->root_dev = 0x0100; /* XXX */
|
||||
|
||||
fail:
|
||||
if (file)
|
||||
grub_file_close (file);
|
||||
}
|
||||
|
||||
|
||||
GRUB_MOD_INIT(linux)
|
||||
{
|
||||
grub_rescue_register_command ("linux",
|
||||
grub_rescue_cmd_linux,
|
||||
"load linux");
|
||||
grub_rescue_register_command ("initrd",
|
||||
grub_rescue_cmd_initrd,
|
||||
"load initrd");
|
||||
my_mod = mod;
|
||||
}
|
||||
|
||||
GRUB_MOD_FINI(linux)
|
||||
{
|
||||
grub_rescue_unregister_command ("linux");
|
||||
grub_rescue_unregister_command ("initrd");
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue