/* multiboot.c - boot a multiboot 2 OS image. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2007,2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see .
*/
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#ifdef __i386__
#include
#endif
typedef void (*kernel_entry_t) (unsigned long, void *, int (void *),
unsigned long, unsigned long);
/* Claim the memory occupied by the multiboot kernel. */
grub_err_t
grub_mb2_arch_elf32_hook (Elf32_Phdr *phdr,
grub_addr_t *addr __attribute__((unused)),
int *do_load)
{
int rc;
if (phdr->p_type != PT_LOAD)
{
*do_load = 0;
return 0;
}
*do_load = 1;
rc = grub_claimmap (phdr->p_paddr, phdr->p_memsz);
if (rc)
return grub_error(GRUB_ERR_OUT_OF_MEMORY, "couldn't claim %x - %x",
phdr->p_paddr, phdr->p_paddr + phdr->p_memsz);
grub_dprintf ("loader", "Loading segment at 0x%x - 0x%x\n", phdr->p_paddr,
phdr->p_paddr + phdr->p_memsz);
return GRUB_ERR_NONE;
}
/* Claim the memory occupied by the multiboot kernel. */
grub_err_t
grub_mb2_arch_elf64_hook (Elf64_Phdr *phdr,
grub_addr_t *addr __attribute__((unused)),
int *do_load)
{
int rc;
if (phdr->p_type != PT_LOAD)
{
*do_load = 0;
return 0;
}
*do_load = 1;
rc = grub_claimmap (phdr->p_paddr, phdr->p_memsz);
if (rc)
return grub_error(GRUB_ERR_OUT_OF_MEMORY, "couldn't claim 0x%lx - 0x%lx",
phdr->p_paddr, phdr->p_paddr + phdr->p_memsz);
grub_dprintf ("loader", "Loading segment at 0x%lx - 0x%lx\n",
(unsigned long) phdr->p_paddr,
(unsigned long) (phdr->p_paddr + phdr->p_memsz));
return GRUB_ERR_NONE;
}
grub_err_t
grub_mb2_arch_module_alloc (grub_size_t size, grub_addr_t *addr)
{
int rc;
/* XXX Will need to map on some firmwares. */
rc = grub_ieee1275_claim (0, size, MULTIBOOT2_MOD_ALIGN, addr);
if (rc)
return grub_error (GRUB_ERR_OUT_OF_MEMORY,
"firmware couldn't allocate memory (size 0x%lx)", size);
return GRUB_ERR_NONE;
}
grub_err_t
grub_mb2_arch_module_free (grub_addr_t addr, grub_size_t size)
{
grub_ieee1275_release (addr, size);
return GRUB_ERR_NONE;
}
grub_err_t
grub_mb2_tags_arch_create (void)
{
/* Nothing special. */
return GRUB_ERR_NONE;
}
/* Release the memory we claimed from Open Firmware above. */
void
grub_mb2_arch_unload (struct multiboot2_tag_header *tags)
{
struct multiboot2_tag_header *tag;
/* Free all module memory in the tag list. */
for_each_tag (tag, tags)
{
if (tag->key == MULTIBOOT2_TAG_MODULE)
{
struct multiboot2_tag_module *module =
(struct multiboot2_tag_module *) tag;
grub_ieee1275_release (module->addr, module->size);
}
}
}
void
grub_mb2_arch_boot (grub_addr_t entry_addr, void *tags)
{
#if defined(__powerpc__)
kernel_entry_t entry = (kernel_entry_t) entry_addr;
entry (MULTIBOOT2_BOOTLOADER_MAGIC, tags, grub_ieee1275_entry_fn, 0, 0);
#elif defined(__i386__)
grub_multiboot2_real_boot (entry_addr, tags);
#else
#error
#endif
}