85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
/* Compute amount of lower and upper memory till the first hole. */
|
|
/*
|
|
* 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/memory.h>
|
|
#include <grub/mm.h>
|
|
#include <grub/misc.h>
|
|
|
|
grub_uint64_t
|
|
grub_mmap_get_lower (void)
|
|
{
|
|
grub_uint64_t lower = 0;
|
|
|
|
auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t, grub_uint32_t);
|
|
int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t size,
|
|
grub_uint32_t type)
|
|
{
|
|
if (type != GRUB_MACHINE_MEMORY_AVAILABLE)
|
|
return 0;
|
|
if (addr == 0)
|
|
lower = size;
|
|
return 0;
|
|
}
|
|
|
|
grub_mmap_iterate (hook);
|
|
if (lower > 0x100000)
|
|
lower = 0x100000;
|
|
return lower;
|
|
}
|
|
|
|
grub_uint64_t
|
|
grub_mmap_get_upper (void)
|
|
{
|
|
grub_uint64_t upper = 0;
|
|
|
|
auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t, grub_uint32_t);
|
|
int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t size,
|
|
grub_uint32_t type)
|
|
{
|
|
if (type != GRUB_MACHINE_MEMORY_AVAILABLE)
|
|
return 0;
|
|
if (addr <= 0x100000 && addr + size > 0x100000)
|
|
upper = addr + size - 0x100000;
|
|
return 0;
|
|
}
|
|
|
|
grub_mmap_iterate (hook);
|
|
return upper;
|
|
}
|
|
|
|
/* Count the continuous bytes after 64 MiB. */
|
|
grub_uint64_t
|
|
grub_mmap_get_post64 (void)
|
|
{
|
|
grub_uint64_t post64 = 0;
|
|
|
|
auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t, grub_uint32_t);
|
|
int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t size,
|
|
grub_uint32_t type)
|
|
{
|
|
if (type != GRUB_MACHINE_MEMORY_AVAILABLE)
|
|
return 0;
|
|
if (addr <= 0x4000000 && addr + size > 0x4000000)
|
|
post64 = addr + size - 0x4000000;
|
|
return 0;
|
|
}
|
|
|
|
grub_mmap_iterate (hook);
|
|
return post64;
|
|
}
|