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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.
*/
#include <cbmem.h>
#include <soc/soc_services.h>
static int cbmem_backing_store_ready;
void ipq_cbmem_backing_store_ready(void)
{
cbmem_backing_store_ready = 1;
}
void *cbmem_top(void)
{
/*
* In romstage, make sure that cbmem backing store is ready before
* returning pointer to cbmem top. Otherwise, it could lead to issues
* with components that utilize cbmem in romstage (e.g. vboot_locator
* for loading ipq blobs before DRAM is initialized).
*/
if (ENV_ROMSTAGE && (cbmem_backing_store_ready == 0))
return NULL;
return _memlayout_cbmem_top;
}
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