blob: 16c35b5dea3f52ae519a391b247aa55668fc8c67 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
/*
* This file is part of the coreboot project.
*
* 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 <stdlib.h>
#include <cbmem.h>
#if CONFIG(CBMEM_TOP_BACKUP)
void *cbmem_top(void)
{
static void *cbmem_top_backup;
void *top_backup;
if (ENV_RAMSTAGE && cbmem_top_backup != NULL)
return cbmem_top_backup;
/* Top of CBMEM is at highest usable DRAM address below 4GiB. */
top_backup = (void *)restore_top_of_low_cacheable();
if (ENV_RAMSTAGE)
cbmem_top_backup = top_backup;
return top_backup;
}
#endif /* CBMEM_TOP_BACKUP */
|
