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/*
* 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.
*/
#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;
}
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