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
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2010 Advanced Micro Devices, 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 <agesawrapper.h>
#include <assert.h>
#include <stdint.h>
#include <arch/io.h>
#include <arch/acpi.h>
#include <console/console.h>
#include <reset.h>
#include <arch/cpu.h>
#include <cbmem.h>
#include <soc/southbridge.h>
#include <soc/pci_devs.h>
#include <cpu/x86/msr.h>
#include <delay.h>
static void enable_wideio(uint8_t port, uint16_t size)
{
uint32_t wideio_enable[] = {
LPC_WIDEIO0_ENABLE,
LPC_WIDEIO1_ENABLE,
LPC_WIDEIO2_ENABLE
};
uint32_t alt_wideio_enable[] = {
LPC_ALT_WIDEIO0_ENABLE,
LPC_ALT_WIDEIO1_ENABLE,
LPC_ALT_WIDEIO2_ENABLE
};
pci_devfn_t dev = PCI_DEV(0, PCU_DEV, LPC_FUNC);
uint32_t tmp;
/* Only allow port 0-2 */
assert(port <= ARRAY_SIZE(wideio_enable));
if (size == 16) {
tmp = pci_read_config32(dev, LPC_ALT_WIDEIO_RANGE_ENABLE);
tmp |= alt_wideio_enable[port];
pci_write_config32(dev, LPC_ALT_WIDEIO_RANGE_ENABLE, tmp);
} else { /* 512 */
tmp = pci_read_config32(dev, LPC_ALT_WIDEIO_RANGE_ENABLE);
tmp &= ~alt_wideio_enable[port];
pci_write_config32(dev, LPC_ALT_WIDEIO_RANGE_ENABLE, tmp);
}
/* Enable the range */
tmp = pci_read_config32(dev, LPC_IO_OR_MEM_DECODE_ENABLE);
tmp |= wideio_enable[port];
pci_write_config32(dev, LPC_IO_OR_MEM_DECODE_ENABLE, tmp);
}
/*
* lpc_wideio_window() may be called any point in romstage, but take
* care that AGESA doesn't overwrite the range this function used.
* The function checks if there is an empty range and if all ranges are
* used the function throws an assert. The function doesn't check for a
* duplicate range, for ranges that can be merged into a single
* range, or ranges that overlap.
*
* The developer is expected to ensure that there are no conflicts.
*/
static void lpc_wideio_window(uint16_t base, uint16_t size)
{
pci_devfn_t dev = PCI_DEV(0, PCU_DEV, LPC_FUNC);
u32 tmp;
/* Support 512 or 16 bytes per range */
assert(size == 512 || size == 16);
/* Find and open Base Register and program it */
tmp = pci_read_config32(dev, LPC_WIDEIO_GENERIC_PORT);
if ((tmp & 0xffff) == 0) { /* WIDEIO0 */
tmp |= base;
pci_write_config32(dev, LPC_WIDEIO_GENERIC_PORT, tmp);
enable_wideio(0, size);
} else if ((tmp & 0xffff0000) == 0) { /* WIDEIO1 */
tmp |= (base << 16);
pci_write_config32(dev, LPC_WIDEIO_GENERIC_PORT, tmp);
enable_wideio(1, size);
} else { /* Check WIDEIO2 register */
tmp = pci_read_config32(dev, LPC_WIDEIO2_GENERIC_PORT);
if ((tmp & 0xffff) == 0) { /* WIDEIO2 */
tmp |= base;
pci_write_config32(dev, LPC_WIDEIO2_GENERIC_PORT, tmp);
enable_wideio(2, size);
} else { /* All WIDEIO locations used*/
assert(0);
}
}
}
void lpc_wideio_512_window(uint16_t base)
{
assert(IS_ALIGNED(base, 512));
lpc_wideio_window(base, 512);
}
void lpc_wideio_16_window(uint16_t base)
{
assert(IS_ALIGNED(base, 16));
lpc_wideio_window(base, 16);
}
|
