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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <acpi/acpi.h>
#include <arch/io.h>
#include <assert.h>
#include <bootmode.h>
#include <device/pci_ops.h>
#include <device/pci_type.h>
#include <stdint.h>
#include "pmbase.h"
#include "pmutil.h"
/* LPC PM Base Address Register */
#define PMBASE 0x40
#define PMSIZE 0x80
u16 lpc_get_pmbase(void)
{
#ifdef __SIMPLE_DEVICE__
/* Don't assume PMBASE is still the same */
return pci_read_config16(PCI_DEV(0, 0x1f, 0), PMBASE) & 0xfffc;
#else
static u16 pmbase;
if (pmbase)
return pmbase;
pmbase = pci_read_config16(pcidev_on_root(0x1f, 0), PMBASE) & 0xfffc;
return pmbase;
#endif
}
void write_pmbase32(const u8 addr, const u32 val)
{
ASSERT(addr <= (PMSIZE - sizeof(u32)));
outl(val, lpc_get_pmbase() + addr);
}
void write_pmbase16(const u8 addr, const u16 val)
{
ASSERT(addr <= (PMSIZE - sizeof(u16)));
outw(val, lpc_get_pmbase() + addr);
}
void write_pmbase8(const u8 addr, const u8 val)
{
ASSERT(addr <= (PMSIZE - sizeof(u8)));
outb(val, lpc_get_pmbase() + addr);
}
u32 read_pmbase32(const u8 addr)
{
ASSERT(addr <= (PMSIZE - sizeof(u32)));
return inl(lpc_get_pmbase() + addr);
}
u16 read_pmbase16(const u8 addr)
{
ASSERT(addr <= (PMSIZE - sizeof(u16)));
return inw(lpc_get_pmbase() + addr);
}
u8 read_pmbase8(const u8 addr)
{
ASSERT(addr <= (PMSIZE - sizeof(u8)));
return inb(lpc_get_pmbase() + addr);
}
int acpi_get_sleep_type(void)
{
return acpi_sleep_from_pm1(read_pmbase32(PM1_CNT));
}
/*
* Note that southbridge_detect_s3_resume clears the sleep state,
* so this may not be used reliable throughout romstage.
*/
int platform_is_resuming(void)
{
u16 reg16 = read_pmbase16(PM1_STS);
if (!(reg16 & WAK_STS))
return 0;
return acpi_get_sleep_type() == ACPI_S3;
}
|
