3
* GRUB -- GRand Unified Bootloader
4
* Copyright (C) 2009 Free Software Foundation, Inc.
6
* GRUB is free software: you can redistribute it and/or modify
7
* it under the terms of the GNU General Public License as published by
8
* the Free Software Foundation, either version 3 of the License, or
9
* (at your option) any later version.
11
* GRUB is distributed in the hope that it will be useful,
12
* but WITHOUT ANY WARRANTY; without even the implied warranty of
13
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14
* GNU General Public License for more details.
16
* You should have received a copy of the GNU General Public License
17
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
20
#include <grub/machine/memory.h>
21
#include <grub/i386/memory.h>
22
#include <grub/memory.h>
24
#include <grub/misc.h>
28
#ifndef GRUB_MMAP_REGISTER_BY_FIRMWARE
31
grub_mmap_malign_and_register (grub_uint64_t align, grub_uint64_t size,
32
int *handle, int type, int flags)
34
grub_uint64_t highestlow = 0;
36
auto int NESTED_FUNC_ATTR find_hook (grub_uint64_t, grub_uint64_t,
38
int NESTED_FUNC_ATTR find_hook (grub_uint64_t start, grub_uint64_t rangesize,
39
grub_memory_type_t memtype)
41
grub_uint64_t end = start + rangesize;
42
if (memtype != GRUB_MEMORY_AVAILABLE)
46
if (end > start + size
47
&& highestlow < ((end - size) - ((end - size) & (align - 1))))
48
highestlow = (end - size) - ((end - size) & (align - 1));
53
if (flags & GRUB_MMAP_MALLOC_LOW)
55
/* FIXME: use low-memory mm allocation once it's available. */
56
grub_mmap_iterate (find_hook);
57
ret = UINT_TO_PTR (highestlow);
60
ret = grub_memalign (align, size);
68
*handle = grub_mmap_register (PTR_TO_UINT64 (ret), size, type);
79
grub_mmap_free_and_unregister (int handle)
81
struct grub_mmap_region *cur;
84
for (cur = grub_mmap_overlays; cur; cur = cur->next)
85
if (cur->handle == handle)
93
grub_mmap_unregister (handle);
96
grub_free (UINT_TO_PTR (addr));