| /* |
| * 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. |
| */ |
| |
| #include <cbmem.h> |
| #include <soc/soc_services.h> |
| |
| static int cbmem_backing_store_ready; |
| |
| void ipq_cbmem_backing_store_ready(void) |
| { |
| cbmem_backing_store_ready = 1; |
| } |
| |
| void *cbmem_top(void) |
| { |
| /* |
| * In romstage, make sure that cbmem backing store is ready before |
| * returning the pointer to cbmem top. Otherwise, it could lead to |
| * issues with components that utilize cbmem in romstage |
| * (e.g. vboot_locator for loading ipq blobs before DRAM is |
| * initialized). |
| */ |
| if (ENV_ROMSTAGE && (cbmem_backing_store_ready == 0)) |
| return NULL; |
| |
| return _memlayout_cbmem_top; |
| } |