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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 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 <http://www.gnu.org/licenses/>.
*/
#include <grub/normal.h>
#include <grub/dl.h>
#include <grub/file.h>
#include <grub/disk.h>
#include <grub/misc.h>
#include <grub/xnu.h>
#include <grub/cpu/xnu.h>
#include <grub/mm.h>
#include <grub/loader.h>
static void *grub_xnu_hibernate_image;
static grub_err_t
grub_xnu_resume_unload (void)
{
/* Free loaded image */
if (grub_xnu_hibernate_image)
grub_free (grub_xnu_hibernate_image);
grub_xnu_hibernate_image = 0;
grub_xnu_unlock ();
return GRUB_ERR_NONE;
}
grub_err_t
grub_xnu_resume (char *imagename)
{
grub_file_t file;
grub_size_t total_header_size;
struct grub_xnu_hibernate_header hibhead;
void *code;
void *image;
grub_uint32_t codedest;
grub_uint32_t codesize;
grub_addr_t target_image;
grub_err_t err;
grub_file_filter_disable_compression ();
file = grub_file_open (imagename);
if (! file)
return 0;
/* Read the header. */
if (grub_file_read (file, &hibhead, sizeof (hibhead))
!=sizeof (hibhead))
{
grub_file_close (file);
return grub_error (GRUB_ERR_READ_ERROR,
"cannot read the hibernate header");
}
/* Check the header. */
if (hibhead.magic != GRUB_XNU_HIBERNATE_MAGIC)
{
grub_file_close (file);
return grub_error (GRUB_ERR_BAD_OS,
"hibernate header has incorrect magic number");
}
if (hibhead.encoffset)
{
grub_file_close (file);
return grub_error (GRUB_ERR_BAD_OS,
"encrypted images aren't supported yet");
}
codedest = hibhead.launchcode_target_page;
codedest *= GRUB_XNU_PAGESIZE;
codesize = hibhead.launchcode_numpages;
codesize *= GRUB_XNU_PAGESIZE;
/* FIXME: check that codedest..codedest+codesize is available. */
/* Calculate total size before pages to copy. */
total_header_size = hibhead.extmapsize + sizeof (hibhead);
/* Unload image if any. */
if (grub_xnu_hibernate_image)
grub_free (grub_xnu_hibernate_image);
/* Try to allocate necessary space.
FIXME: mm isn't good enough yet to handle huge allocations.
*/
grub_xnu_relocator = grub_relocator_new ();
if (!grub_xnu_relocator)
{
grub_file_close (file);
return grub_errno;
}
{
grub_relocator_chunk_t ch;
err = grub_relocator_alloc_chunk_addr (grub_xnu_relocator, &ch, codedest,
codesize + GRUB_XNU_PAGESIZE);
if (err)
{
grub_file_close (file);
return err;
}
code = get_virtual_current_address (ch);
}
{
grub_relocator_chunk_t ch;
err = grub_relocator_alloc_chunk_align (grub_xnu_relocator, &ch, 0,
(0xffffffff - hibhead.image_size) + 1,
hibhead.image_size,
GRUB_XNU_PAGESIZE,
GRUB_RELOCATOR_PREFERENCE_NONE);
if (err)
{
grub_file_close (file);
return err;
}
image = get_virtual_current_address (ch);
target_image = get_physical_target_address (ch);
}
/* Read code part. */
if (grub_file_seek (file, total_header_size) == (grub_off_t) -1
|| grub_file_read (file, code, codesize)
!= (grub_ssize_t) codesize)
{
grub_file_close (file);
return grub_error (GRUB_ERR_READ_ERROR, "cannot read resume image");
}
/* Read image. */
if (grub_file_seek (file, 0) == (grub_off_t) -1
|| grub_file_read (file, image, hibhead.image_size)
!= (grub_ssize_t) hibhead.image_size)
{
grub_file_close (file);
return grub_error (GRUB_ERR_READ_ERROR, "cannot read resume image");
}
grub_file_close (file);
/* Setup variables needed by asm helper. */
grub_xnu_heap_target_start = codedest;
grub_xnu_heap_size = target_image + hibhead.image_size - codedest;
grub_xnu_stack = (codedest + hibhead.stack);
grub_xnu_entry_point = (codedest + hibhead.entry_point);
grub_xnu_arg1 = target_image;
grub_dprintf ("xnu", "entry point 0x%x\n", codedest + hibhead.entry_point);
grub_dprintf ("xnu", "image at 0x%x\n",
codedest + codesize + GRUB_XNU_PAGESIZE);
/* We're ready now. */
grub_loader_set (grub_xnu_boot_resume,
grub_xnu_resume_unload, 0);
/* Prevent module from unloading. */
grub_xnu_lock ();
return GRUB_ERR_NONE;
}
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