2N/A/* Compute amount of lower and upper memory till the first hole. */
2N/A/*
2N/A * GRUB -- GRand Unified Bootloader
2N/A * Copyright (C) 2009 Free Software Foundation, Inc.
2N/A *
2N/A * GRUB is free software: you can redistribute it and/or modify
2N/A * it under the terms of the GNU General Public License as published by
2N/A * the Free Software Foundation, either version 3 of the License, or
2N/A * (at your option) any later version.
2N/A *
2N/A * GRUB is distributed in the hope that it will be useful,
2N/A * but WITHOUT ANY WARRANTY; without even the implied warranty of
2N/A * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2N/A * GNU General Public License for more details.
2N/A *
2N/A * You should have received a copy of the GNU General Public License
2N/A * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
2N/A */
2N/A
2N/A#include <grub/memory.h>
2N/A#include <grub/mm.h>
2N/A#include <grub/misc.h>
2N/A#include <grub/cpu/memory.h>
2N/A
2N/Agrub_uint64_t
2N/Agrub_mmap_get_lower (void)
2N/A{
2N/A grub_uint64_t lower = 0;
2N/A
2N/A auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t,
2N/A grub_memory_type_t);
2N/A int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t size,
2N/A grub_memory_type_t type)
2N/A {
2N/A if (type != GRUB_MEMORY_AVAILABLE)
2N/A return 0;
2N/A if (addr == 0)
2N/A lower = size;
2N/A return 0;
2N/A }
2N/A
2N/A grub_mmap_iterate (hook);
2N/A if (lower > GRUB_ARCH_LOWMEMMAXSIZE)
2N/A lower = GRUB_ARCH_LOWMEMMAXSIZE;
2N/A return lower;
2N/A}
2N/A
2N/Agrub_uint64_t
2N/Agrub_mmap_get_upper (void)
2N/A{
2N/A grub_uint64_t upper = 0;
2N/A
2N/A auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t,
2N/A grub_memory_type_t);
2N/A int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t size,
2N/A grub_memory_type_t type)
2N/A {
2N/A if (type != GRUB_MEMORY_AVAILABLE)
2N/A return 0;
2N/A if (addr <= GRUB_ARCH_HIGHMEMPSTART && addr + size
2N/A > GRUB_ARCH_HIGHMEMPSTART)
2N/A upper = addr + size - GRUB_ARCH_HIGHMEMPSTART;
2N/A return 0;
2N/A }
2N/A
2N/A grub_mmap_iterate (hook);
2N/A return upper;
2N/A}