blob: d9f6160dfcf71ce16bb51372e5a753a851da90d9 (
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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 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 <arch/romstage.h>
#include <cbmem.h>
#include <cpu/x86/mtrr.h>
#include <cpu/x86/smm.h>
#include <soc/iosf.h>
static uintptr_t smm_region_start(void)
{
return (iosf_bunit_read(BUNIT_SMRRL) << 20);
}
static size_t smm_region_size(void)
{
return CONFIG_SMM_TSEG_SIZE;
}
void *cbmem_top(void)
{
return (void *) smm_region_start();
}
void smm_region(uintptr_t *start, size_t *size)
{
*start = (iosf_bunit_read(BUNIT_SMRRL) & 0xFFFF) << 20;
*size = smm_region_size();
}
void fill_postcar_frame(struct postcar_frame *pcf)
{
uintptr_t top_of_ram;
/* Cache at least 8 MiB below the top of ram, and at most 8 MiB
* above top of the ram. This satisfies MTRR alignment requirement
* with different TSEG size configurations.
*/
top_of_ram = ALIGN_DOWN((uintptr_t)cbmem_top(), 8*MiB);
postcar_frame_add_mtrr(pcf, top_of_ram - 8*MiB, 16*MiB,
MTRR_TYPE_WRBACK);
}
|
