2
* GRUB -- GRand Unified Bootloader
3
* Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
5
* GRUB is free software: you can redistribute it and/or modify
6
* it under the terms of the GNU General Public License as published by
7
* the Free Software Foundation, either version 3 of the License, or
8
* (at your option) any later version.
10
* GRUB is distributed in the hope that it will be useful,
11
* but WITHOUT ANY WARRANTY; without even the implied warranty of
12
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13
* GNU General Public License for more details.
15
* You should have received a copy of the GNU General Public License
16
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
19
#include <grub/machine/init.h>
20
#include <grub/machine/memory.h>
21
#include <grub/types.h>
22
#include <grub/multiboot.h>
24
#include <grub/misc.h>
26
grub_size_t grub_lower_mem, grub_upper_mem;
28
/* A pointer to the MBI in its initial location. */
29
struct multiboot_info *startup_multiboot_info;
31
/* The MBI has to be copied to our BSS so that it won't be
32
overwritten. This is its final location. */
33
static struct multiboot_info kern_multiboot_info;
35
/* Unfortunately we can't use heap at this point. But 32 looks like a sane
36
limit (used by memtest86). */
37
static grub_uint8_t mmap_entries[sizeof (struct multiboot_mmap_entry) * 32];
40
grub_machine_mmap_init ()
42
if (! startup_multiboot_info)
43
grub_fatal ("Unable to find Multiboot Information (is CONFIG_MULTIBOOT disabled in coreboot?)");
45
/* Move MBI to a safe place. */
46
grub_memmove (&kern_multiboot_info, startup_multiboot_info, sizeof (struct multiboot_info));
48
if ((kern_multiboot_info.flags & MULTIBOOT_INFO_MEM_MAP) == 0)
49
grub_fatal ("Missing Multiboot memory information");
51
/* Move the memory map to a safe place. */
52
if (kern_multiboot_info.mmap_length > sizeof (mmap_entries))
54
grub_printf ("WARNING: Memory map size exceeds limit (0x%x > 0x%x); it will be truncated\n",
55
kern_multiboot_info.mmap_length, sizeof (mmap_entries));
56
kern_multiboot_info.mmap_length = sizeof (mmap_entries);
58
grub_memmove (mmap_entries, (void *) kern_multiboot_info.mmap_addr, kern_multiboot_info.mmap_length);
59
kern_multiboot_info.mmap_addr = (grub_uint32_t) mmap_entries;
61
if ((kern_multiboot_info.flags & MULTIBOOT_INFO_MEMORY) == 0)
63
grub_lower_mem = GRUB_MEMORY_MACHINE_LOWER_USABLE;
68
grub_lower_mem = kern_multiboot_info.mem_lower * 1024;
69
grub_upper_mem = kern_multiboot_info.mem_upper * 1024;
74
grub_machine_mmap_iterate (int NESTED_FUNC_ATTR (*hook) (grub_uint64_t, grub_uint64_t, grub_uint32_t))
76
struct multiboot_mmap_entry *entry = (void *) kern_multiboot_info.mmap_addr;
78
while ((unsigned long) entry < kern_multiboot_info.mmap_addr + kern_multiboot_info.mmap_length)
80
if (hook (entry->addr, entry->len, entry->type))
83
entry = (void *) ((grub_addr_t) entry + entry->size + sizeof (entry->size));