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
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
#include <acpi/acpi.h>
#include <amdblocks/acpi.h>
#include <amdblocks/acpimmio.h>
#include <amdblocks/psp.h>
#include <amdblocks/smi.h>
#include <amdblocks/smm.h>
#include <arch/hlt.h>
#include <arch/io.h>
#include <console/console.h>
#include <console/cbmem_console.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/smm.h>
#include <elog.h>
#include <psp_verstage/psp_transfer.h>
#include <soc/smi.h>
#include <soc/smu.h>
#include <soc/southbridge.h>
#include <types.h>
/*
* Both the psp_notify_sx_info and the smu_sx_entry call will clobber the SMN index register
* during the SMN accesses. Since the SMI handler is the last thing that gets called before
* entering S3, this won't interfere with any indirect SMN accesses via the same register pair.
*/
static void fch_slp_typ_handler(void)
{
uint32_t pci_ctrl, reg32;
uint16_t pm1cnt, reg16;
uint8_t slp_typ, rst_ctrl;
/* Figure out SLP_TYP */
pm1cnt = acpi_read16(MMIO_ACPI_PM1_CNT_BLK);
printk(BIOS_SPEW, "SMI#: SLP = 0x%04x\n", pm1cnt);
slp_typ = acpi_sleep_from_pm1(pm1cnt);
/* Do any mainboard sleep handling */
mainboard_smi_sleep(slp_typ);
switch (slp_typ) {
case ACPI_S0:
printk(BIOS_DEBUG, "SMI#: Entering S0 (On)\n");
break;
case ACPI_S3:
printk(BIOS_DEBUG, "SMI#: Entering S3 (Suspend-To-RAM)\n");
break;
case ACPI_S4:
printk(BIOS_DEBUG, "SMI#: Entering S4 (Suspend-To-Disk)\n");
break;
case ACPI_S5:
printk(BIOS_DEBUG, "SMI#: Entering S5 (Soft Power off)\n");
break;
default:
printk(BIOS_DEBUG, "SMI#: ERROR: SLP_TYP reserved\n");
break;
}
if (slp_typ >= ACPI_S3) {
wbinvd();
clear_all_smi_status();
/* Do not send SMI before AcpiPm1CntBlkx00[SlpTyp] */
pci_ctrl = pm_read32(PM_PCI_CTRL);
pci_ctrl &= ~FORCE_SLPSTATE_RETRY;
pm_write32(PM_PCI_CTRL, pci_ctrl);
/* Enable SlpTyp */
rst_ctrl = pm_read8(PM_RST_CTRL1);
rst_ctrl |= SLPTYPE_CONTROL_EN;
pm_write8(PM_RST_CTRL1, rst_ctrl);
/*
* Before the final command, check if there's pending wake
* event. Read enable first, so that reading the actual status
* is as close as possible to entering S3. The idea is to
* minimize the opportunity for a wake event to happen before
* actually entering S3. If there's a pending wake event, log
* it and continue normal path. S3 will fail and the wake event
* becomes a SCI.
*/
if (CONFIG(ELOG_GSMI)) {
reg16 = acpi_read16(MMIO_ACPI_PM1_EN);
reg16 &= acpi_read16(MMIO_ACPI_PM1_STS);
if (reg16)
elog_add_extended_event(
ELOG_SLEEP_PENDING_PM1_WAKE,
(u32)reg16);
reg32 = acpi_read32(MMIO_ACPI_GPE0_EN);
reg32 &= acpi_read32(MMIO_ACPI_GPE0_STS);
if (reg32)
elog_add_extended_event(
ELOG_SLEEP_PENDING_GPE0_WAKE,
reg32);
} /* if (CONFIG(ELOG_GSMI)) */
if (slp_typ == ACPI_S3)
psp_notify_sx_info(ACPI_S3);
smu_sx_entry(); /* Leave SlpTypeEn clear, SMU will set */
printk(BIOS_ERR, "System did not go to sleep\n");
hlt();
}
}
/*
* Table of functions supported in the SMI handler. Note that SMI source setup
* in fch.c is unrelated to this list.
*/
static const struct smi_sources_t smi_sources[] = {
{ .type = SMITYPE_SMI_CMD_PORT, .handler = fch_apmc_smi_handler },
{ .type = SMITYPE_SLP_TYP, .handler = fch_slp_typ_handler},
};
void *get_smi_source_handler(int source)
{
size_t i;
for (i = 0 ; i < ARRAY_SIZE(smi_sources) ; i++)
if (smi_sources[i].type == source)
return smi_sources[i].handler;
return NULL;
}
void smm_soc_early_init(void)
{
if (CONFIG(VBOOT_STARTS_BEFORE_BOOTBLOCK) && __CBMEM_CONSOLE_ENABLE__)
replay_transfer_buffer_cbmemc();
}
|
