| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2014 Google Inc. |
| * |
| * This program 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; version 2 of the License. |
| * |
| * This program 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 this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <cbmem.h> |
| #include <soc/addressmap.h> |
| |
| void *cbmem_top(void) |
| { |
| static uintptr_t addr; |
| |
| if (addr == 0) { |
| uintptr_t begin_mib; |
| uintptr_t end_mib; |
| |
| memory_in_range_below_4gb(&begin_mib, &end_mib); |
| /* Make sure we consume everything up to 4GiB. */ |
| if (end_mib == 4096) |
| addr = ~(uint32_t)0; |
| else |
| addr = end_mib << 20; |
| } |
| |
| return (void *)addr; |
| } |