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/*
* 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;
}
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