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
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2017 Intel Corporation.
*
* 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/io.h>
#include <bootstate.h>
#include <chip.h>
#include <intelblocks/fast_spi.h>
#include <intelblocks/lpc_lib.h>
#include <intelblocks/pcr.h>
#include <soc/pci_devs.h>
#include <soc/pcr_ids.h>
#include <soc/pm.h>
#include <string.h>
#define PCR_DMI_GCS 0x274C
#define PCR_DMI_GCS_BILD (1 << 0)
static void pmc_lockdown_cfg(const struct soc_intel_cannonlake_config *config)
{
uint8_t *pmcbase;
uint32_t reg32, pmsyncreg;
/* PMSYNC */
pmcbase = pmc_mmio_regs();
pmsyncreg = read32(pmcbase + PMSYNC_TPR_CFG);
pmsyncreg |= PMSYNC_LOCK;
write32(pmcbase + PMSYNC_TPR_CFG, pmsyncreg);
/* Lock down ABASE and sleep stretching policy */
reg32 = read32(pmcbase + GEN_PMCON_B);
reg32 |= (SLP_STR_POL_LOCK | ACPI_BASE_LOCK);
write32(pmcbase + GEN_PMCON_B, reg32);
if (config->chipset_lockdown == CHIPSET_LOCKDOWN_COREBOOT) {
pmcbase = pmc_mmio_regs();
reg8 = read8(pmcbase + GEN_PMCON_B);
reg8 |= SMI_LOCK;
write8(pmcbase + GEN_PMCON_B, reg8);
}
}
static void dmi_lockdown_cfg(void)
{
/*
* GCS reg of DMI
*
* When set, prevents GCS.BBS from being changed
* GCS.BBS: (Boot BIOS Strap) This field determines the destination
* of accesses to the BIOS memory range.
* Bits Description
* "0b": SPI
* "1b": LPC/eSPI
*/
pcr_or8(PID_DMI, PCR_DMI_GCS, PCR_DMI_GCS_BILD);
}
static void spi_lockdown_cfg(const struct soc_intel_cannonlake_config *config)
{
/* Set FAST_SPI opcode menu */
fast_spi_set_opcode_menu();
/* Discrete Lock Flash PR registers */
fast_spi_pr_dlock();
/* Lock FAST_SPIBAR */
fast_spi_lock_bar();
/* Set Bios Interface Lock, Bios Lock */
if (config->chipset_lockdown == CHIPSET_LOCKDOWN_COREBOOT) {
/* Bios Interface Lock */
fast_spi_set_bios_interface_lock_down();
/* Bios Lock */
fast_spi_set_lock_enable();
}
}
static void platform_lockdown_config(void *unused)
{
struct soc_intel_cannonlake_config *config;
struct device *dev;
dev = PCH_DEV_SPI;
/* Check if device is valid, else return */
if (dev == NULL || dev->chip_info == NULL)
return;
config = dev->chip_info;
/* SPI lock down configuration */
spi_lockdown_cfg(config);
/* DMI lock down configuration */
dmi_lockdown_cfg();
/* PMC lock down configuration */
pmc_lockdown_cfg(config);
}
BOOT_STATE_INIT_ENTRY(BS_DEV_RESOURCES, BS_ON_EXIT, platform_lockdown_config,
NULL);
|
