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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/*
* This file is part of the LinuxBIOS project.
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Turn off machine check triggers when reading
* pci space where there are no devices.
* This is necessary when scaning the bus for
* devices which is done by the kernel
*
* written in 2003 by Eric Biederman
*
* - Athlon64 workarounds by Stefan Reinauer
* - "reset once" logic by Yinghai Lu
* Copyright (C) 2007 Silicon Integrated Systems Corp. (SiS)
* Written by Morgan Tsai <my_tsai@sis.com> for SiS.
*
*/
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <part/hard_reset.h>
#include <pc80/mc146818rtc.h>
#include <bitops.h>
#include <cpu/amd/model_fxx_rev.h>
//#include "amdk8.h"
#include <arch/io.h>
/**
* @brief Read resources for AGP aperture
*
* @param
*
* There is only one AGP aperture resource needed. The resoruce is added to
* the northbridge of BSP.
*
* The same trick can be used to augment legacy VGA resources which can
* be detect by generic pci reousrce allocator for VGA devices.
* BAD: it is more tricky than I think, the resource allocation code is
* implemented in a way to NOT DOING legacy VGA resource allcation on
* purpose :-(.
*/
typedef struct msr_struct
{
unsigned lo;
unsigned hi;
} msr_t;
static inline msr_t rdmsr(unsigned index)
{
msr_t result;
result.lo = 0;
result.hi = 0;
return result;
}
static void sisnb_read_resources(device_t dev)
{
struct resource *resource;
unsigned char iommu;
/* Read the generic PCI resources */
printk_debug("sisnb_read_resources\n");
pci_dev_read_resources(dev);
/* If we are not the first processor don't allocate the gart apeture */
if (dev->path.u.pci.devfn != PCI_DEVFN(0x0, 0)) {
return;
}
return;
iommu = 1;
get_option(&iommu, "iommu");
if (iommu) {
/* Add a Gart apeture resource */
resource = new_resource(dev, 0x94);
resource->size = iommu?AGP_APERTURE_SIZE:1;
resource->align = log2(resource->size);
resource->gran = log2(resource->size);
resource->limit = 0xffffffff; /* 4G */
resource->flags = IORESOURCE_MEM;
}
}
static void set_agp_aperture(device_t dev)
{
struct resource *resource;
return;
resource = probe_resource(dev, 0x94);
if (resource) {
device_t pdev;
uint32_t gart_base, gart_acr;
/* Remember this resource has been stored */
resource->flags |= IORESOURCE_STORED;
/* Find the size of the GART aperture */
gart_acr = (0<<6)|(0<<5)|(0<<4)|((resource->gran - 25) << 1)|(0<<0);
/* Get the base address */
gart_base = ((resource->base) >> 25) & 0x00007fff;
/* Update the other northbriges */
pdev = 0;
while((pdev = dev_find_device(PCI_VENDOR_ID_AMD, 0x1103, pdev))) {
/* Store the GART size but don't enable it */
pci_write_config32(pdev, 0x90, gart_acr);
/* Store the GART base address */
pci_write_config32(pdev, 0x94, gart_base);
/* Don't set the GART Table base address */
pci_write_config32(pdev, 0x98, 0);
/* Report the resource has been stored... */
report_resource_stored(pdev, resource, " <gart>");
}
}
}
static void sisnb_set_resources(device_t dev)
{
printk_debug("sisnb_set_resources ------->\n");
/* Set the gart apeture */
// set_agp_aperture(dev);
/* Set the generic PCI resources */
pci_dev_set_resources(dev);
printk_debug("sisnb_set_resources <-------\n");
}
static void sisnb_init(struct device *dev)
{
uint32_t cmd, cmd_ref;
int needs_reset;
struct device *f0_dev, *f2_dev;
msr_t msr;
needs_reset = 0;
printk_debug("sisnb_init: ---------->\n");
//dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_SIS, PCI_DEVICE_ID_SIS_SIS756), 0);
msr = rdmsr(0xC001001A);
pci_write_config16(dev, 0x8E, msr.lo >> 16); // Topbound
pci_write_config8(dev, 0x7F, 0x08); // ACPI Base
outb(inb(0x856) | 0x40, 0x856); // Auto-Reset Function
printk_debug("sisnb_init: <----------\n");
printk_debug("done.\n");
}
static struct device_operations sisnb_ops = {
.read_resources = sisnb_read_resources,
.set_resources = sisnb_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = sisnb_init,
.scan_bus = 0,
.ops_pci = 0,
};
static const struct pci_driver sisnb_driver __pci_driver = {
.ops = &sisnb_ops,
.vendor = PCI_VENDOR_ID_SIS,
.device = PCI_DEVICE_ID_SIS_SIS761,
};
|
