/* * 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 */ if (top_of_memory) top_of_memory -= 0x10000; /* Return the top of memory */ return (void *)top_of_memory; }