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
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008-2009 coresystems GmbH
*
* 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 <device/device.h>
#include <device/pci.h>
#include <console/console.h>
#include <arch/io.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/smm.h>
#include <cpu/intel/smm_reloc.h>
#include <southbridge/intel/common/pmbase.h>
#include <southbridge/intel/common/pmutil.h>
#include "pmutil.h"
#define DEBUG_PERIODIC_SMIS 0
u16 get_pmbase(void)
{
return lpc_get_pmbase();
}
void southbridge_smm_init(void)
{
u32 smi_en;
u16 pm1_en;
u32 gpe0_en;
if (CONFIG(ELOG))
/* Log events from chipset before clearing */
pch_log_state();
printk(BIOS_DEBUG, "Initializing southbridge SMI...");
printk(BIOS_SPEW, " ... pmbase = 0x%04x\n", lpc_get_pmbase());
smi_en = read_pmbase32(SMI_EN);
if (smi_en & APMC_EN) {
printk(BIOS_INFO, "SMI# handler already enabled?\n");
return;
}
printk(BIOS_DEBUG, "\n");
dump_smi_status(reset_smi_status());
dump_pm1_status(reset_pm1_status());
dump_gpe0_status(reset_gpe0_status());
dump_alt_gp_smi_status(reset_alt_gp_smi_status());
dump_tco_status(reset_tco_status());
/* Disable GPE0 PME_B0 */
gpe0_en = read_pmbase32(GPE0_EN);
gpe0_en &= ~PME_B0_EN;
write_pmbase32(GPE0_EN, gpe0_en);
pm1_en = 0;
pm1_en |= PWRBTN_EN;
pm1_en |= GBL_EN;
write_pmbase16(PM1_EN, pm1_en);
/* Enable SMI generation:
* - on TCO events
* - on APMC writes (io 0xb2)
* - on writes to SLP_EN (sleep states)
* - on writes to GBL_RLS (bios commands)
* No SMIs:
* - on microcontroller writes (io 0x62/0x66)
*/
smi_en = 0; /* reset SMI enables */
#if 0
smi_en |= LEGACY_USB2_EN | LEGACY_USB_EN;
#endif
smi_en |= TCO_EN;
smi_en |= APMC_EN;
#if DEBUG_PERIODIC_SMIS
/* Set DEBUG_PERIODIC_SMIS in pch.h to debug using
* periodic SMIs.
*/
smi_en |= PERIODIC_EN;
#endif
smi_en |= SLP_SMI_EN;
#if 0
smi_en |= BIOS_EN;
#endif
/* The following need to be on for SMIs to happen */
smi_en |= EOS | GBL_SMI_EN;
write_pmbase32(SMI_EN, smi_en);
}
void smm_setup_structures(void *gnvs, void *tcg, void *smi1)
{
/*
* Issue SMI to set the gnvs pointer in SMM.
* tcg and smi1 are unused.
*
* EAX = APM_CNT_GNVS_UPDATE
* EBX = gnvs pointer
* EDX = APM_CNT
*/
asm volatile (
"outb %%al, %%dx\n\t"
: /* ignore result */
: "a" (APM_CNT_GNVS_UPDATE),
"b" ((uintptr_t)gnvs),
"d" (APM_CNT)
);
}
void southbridge_smm_clear_state(void)
{
u32 smi_en;
if (CONFIG(ELOG))
/* Log events from chipset before clearing */
pch_log_state();
printk(BIOS_DEBUG, "Initializing Southbridge SMI...\n");
printk(BIOS_SPEW, " ... pmbase = 0x%04x\n", get_pmbase());
smi_en = inl(get_pmbase() + SMI_EN);
if (smi_en & APMC_EN) {
printk(BIOS_INFO, "SMI# handler already enabled?\n");
return;
}
printk(BIOS_DEBUG, "\n");
/* Dump and clear status registers */
reset_smi_status();
reset_pm1_status();
reset_tco_status();
reset_gpe0_status();
}
|
