40a3e321d4
This includes Chrome OS downstream up to Change-Id: Ic89ed54c. Change-Id: I81853434600390d643160fe57554495b2bfe60ab Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Reviewed-on: http://review.coreboot.org/10633 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
40 lines
1 KiB
C
40 lines
1 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2014 Google Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc.
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*/
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#include <cbmem.h>
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#include <soc/addressmap.h>
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void *cbmem_top(void)
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{
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static uintptr_t addr;
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if (addr == 0) {
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uintptr_t begin_mib;
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uintptr_t end_mib;
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memory_in_range_below_4gb(&begin_mib, &end_mib);
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/* Make sure we consume everything up to 4GIB. */
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if (end_mib == 4096)
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addr = ~(uint32_t)0;
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else
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addr = end_mib << 20;
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}
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return (void *)addr;
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}
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