6944770e0c
* include/multiboot2.h (multiboot_word): Rename from this ...
(multiboot2_word): ... to this. Update all users.
(multiboot_header): Rename from this ...
(multiboot2_header): ... to this. Update all users.
(multiboot_tag_header): Rename from this ...
(multiboot2_tag_header): ... to this. Update all users.
(multiboot_tag_start): Rename from this ...
(multiboot2_tag_start): ... to this. Update all users.
(multiboot_tag_name): Rename from this ...
(multiboot2_tag_name): ... to this. Update all users.
(multiboot_tag_module): Rename from this ...
(multiboot2_tag_module): ... to this. Update all users.
(multiboot_tag_memory): Rename from this ...
(multiboot2_tag_memory): ... to this. Update all users.
(multiboot_tag_unused): Rename from this ...
(multiboot2_tag_unused): ... to this. Update all users.
(multiboot_tag_end): Rename from this ...
(multiboot2_tag_end): ... to this. Update all users.
145 lines
3.7 KiB
C
145 lines
3.7 KiB
C
/* multiboot.c - boot a multiboot 2 OS image. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2007 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/loader.h>
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#include <grub/ieee1275/ieee1275.h>
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#include <grub/multiboot2.h>
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#include <multiboot2.h>
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#include <grub/err.h>
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#include <grub/elf.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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#include <grub/machine/kernel.h>
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#include <grub/machine/loader.h>
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#ifdef __i386__
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#include <grub/cpu/multiboot.h>
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#endif
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typedef void (*kernel_entry_t) (unsigned long, void *, int (void *),
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unsigned long, unsigned long);
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/* Claim the memory occupied by the multiboot kernel. */
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grub_err_t
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grub_mb2_arch_elf32_hook (Elf32_Phdr *phdr, UNUSED grub_addr_t *addr,
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int *do_load)
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{
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int rc;
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if (phdr->p_type != PT_LOAD)
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{
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*do_load = 0;
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return 0;
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}
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*do_load = 1;
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rc = grub_claimmap (phdr->p_paddr, phdr->p_memsz);
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if (rc)
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return grub_error(GRUB_ERR_OUT_OF_MEMORY, "Couldn't claim %x - %x",
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phdr->p_paddr, phdr->p_paddr + phdr->p_memsz);
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grub_dprintf ("loader", "Loading segment at 0x%x - 0x%x\n", phdr->p_paddr,
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phdr->p_paddr + phdr->p_memsz);
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return GRUB_ERR_NONE;
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}
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/* Claim the memory occupied by the multiboot kernel. */
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grub_err_t
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grub_mb2_arch_elf64_hook (Elf64_Phdr *phdr, UNUSED grub_addr_t *addr,
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int *do_load)
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{
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int rc;
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if (phdr->p_type != PT_LOAD)
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{
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*do_load = 0;
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return 0;
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}
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*do_load = 1;
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rc = grub_claimmap (phdr->p_paddr, phdr->p_memsz);
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if (rc)
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return grub_error(GRUB_ERR_OUT_OF_MEMORY, "Couldn't claim 0x%lx - 0x%lx",
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phdr->p_paddr, phdr->p_paddr + phdr->p_memsz);
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grub_dprintf ("loader", "Loading segment at 0x%lx - 0x%lx\n",
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(unsigned long) phdr->p_paddr,
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(unsigned long) (phdr->p_paddr + phdr->p_memsz));
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return GRUB_ERR_NONE;
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}
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grub_err_t
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grub_mb2_arch_module_alloc (grub_size_t size, grub_addr_t *addr)
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{
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int rc;
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/* XXX Will need to map on some firmwares. */
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rc = grub_ieee1275_claim (0, size, MULTIBOOT2_MOD_ALIGN, addr);
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if (rc)
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return grub_error (GRUB_ERR_OUT_OF_MEMORY,
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"Firmware couldn't allocate memory (size 0x%lx)", size);
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return GRUB_ERR_NONE;
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}
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grub_err_t
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grub_mb2_arch_module_free (grub_addr_t addr, grub_size_t size)
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{
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grub_ieee1275_release (addr, size);
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return GRUB_ERR_NONE;
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}
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grub_err_t
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grub_mb2_tags_arch_create (void)
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{
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/* Nothing special. */
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return GRUB_ERR_NONE;
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}
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/* Release the memory we claimed from Open Firmware above. */
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void
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grub_mb2_arch_unload (struct multiboot2_tag_header *tags)
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{
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struct multiboot2_tag_header *tag;
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/* Free all module memory in the tag list. */
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for_each_tag (tag, tags)
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{
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if (tag->key == MULTIBOOT2_TAG_MODULE)
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{
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struct multiboot2_tag_module *module =
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(struct multiboot2_tag_module *) tag;
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grub_ieee1275_release (module->addr, module->size);
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}
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}
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}
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void
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grub_mb2_arch_boot (grub_addr_t entry_addr, void *tags)
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{
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#if defined(__powerpc__)
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kernel_entry_t entry = (kernel_entry_t) entry_addr;
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entry (MULTIBOOT2_BOOTLOADER_MAGIC, tags, grub_ieee1275_entry_fn, 0, 0);
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#elif defined(__i386__)
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grub_multiboot2_real_boot (entry_addr, tags);
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#else
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#error
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#endif
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}
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