| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2015-2016 Intel Corporation. |
| * |
| * 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/reg_access.h> |
| |
| void *cbmem_top(void) |
| { |
| uint32_t top_of_memory; |
| |
| /* Determine the TSEG base */ |
| top_of_memory = reg_host_bridge_unit_read(QNC_MSG_FSBIC_REG_HSMMC); |
| top_of_memory &= SMM_START_MASK; |
| top_of_memory <<= 16; |
| |
| /* Reserve 64 KiB for RMU firmware */ |
| top_of_memory -= 0x10000; |
| |
| /* Return the top of memory */ |
| return (void *)top_of_memory; |
| } |