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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
/* 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
*/
#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"
/**
* @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 :-(.
*/
static void mcf3_read_resources(device_t dev)
{
struct resource *resource;
unsigned char iommu;
/* Read the generic PCI resources */
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(0x18, 3)) {
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;
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 mcf3_set_resources(device_t dev)
{
/* Set the gart apeture */
set_agp_aperture(dev);
/* Set the generic PCI resources */
pci_dev_set_resources(dev);
}
static void misc_control_init(struct device *dev)
{
uint32_t cmd, cmd_ref;
int needs_reset;
struct device *f0_dev, *f2_dev;
printk_debug("NB: Function 3 Misc Control.. ");
needs_reset = 0;
/* Disable Machine checks from Invalid Locations.
* This is needed for PC backwards compatibility.
*/
cmd = pci_read_config32(dev, 0x44);
cmd |= (1<<6) | (1<<25);
pci_write_config32(dev, 0x44, cmd );
if (is_cpu_pre_c0()) {
/* Errata 58
* Disable CPU low power states C2, C1 and throttling
*/
cmd = pci_read_config32(dev, 0x80);
cmd &= ~(1<<0);
pci_write_config32(dev, 0x80, cmd );
cmd = pci_read_config32(dev, 0x84);
cmd &= ~(1<<24);
cmd &= ~(1<<8);
pci_write_config32(dev, 0x84, cmd );
/* Errata 66
* Limit the number of downstream posted requests to 1
*/
cmd = pci_read_config32(dev, 0x70);
if ((cmd & (3 << 0)) != 2) {
cmd &= ~(3<<0);
cmd |= (2<<0);
pci_write_config32(dev, 0x70, cmd );
needs_reset = 1;
}
cmd = pci_read_config32(dev, 0x7c);
if ((cmd & (3 << 4)) != 0) {
cmd &= ~(3<<4);
cmd |= (0<<4);
pci_write_config32(dev, 0x7c, cmd );
needs_reset = 1;
}
/* Clock Power/Timing Low */
cmd = pci_read_config32(dev, 0xd4);
if (cmd != 0x000D0001) {
cmd = 0x000D0001;
pci_write_config32(dev, 0xd4, cmd);
needs_reset = 1; /* Needed? */
}
}
else if(is_cpu_pre_d0()) {
uint32_t dcl;
f2_dev = dev_find_slot(0, dev->path.u.pci.devfn - 3 + 2);
/* Errata 98
* Set Clk Ramp Hystersis to 7
* Clock Power/Timing Low
*/
cmd_ref = 0x04e20707; /* Registered */
dcl = pci_read_config32(f2_dev, DRAM_CONFIG_LOW);
if (dcl & DCL_UnBufDimm) {
cmd_ref = 0x000D0701; /* Unbuffered */
}
cmd = pci_read_config32(dev, 0xd4);
if(cmd != cmd_ref) {
pci_write_config32(dev, 0xd4, cmd_ref );
needs_reset = 1; /* Needed? */
}
}
/* Optimize the Link read pointers */
f0_dev = dev_find_slot(0, dev->path.u.pci.devfn - 3);
if (f0_dev) {
int link;
cmd_ref = cmd = pci_read_config32(dev, 0xdc);
for(link = 0; link < 3; link++) {
uint32_t link_type;
unsigned reg;
/* This works on an Athlon64 because unimplemented links return 0 */
reg = 0x98 + (link * 0x20);
link_type = pci_read_config32(f0_dev, reg);
/* Only handle coherent link here please */
if ((link_type & (LinkConnected|InitComplete|NonCoherent))
== (LinkConnected|InitComplete))
{
cmd &= ~(0xff << (link *8));
/* FIXME this assumes the device on the other side is an AMD device */
cmd |= 0x25 << (link *8);
}
}
if (cmd != cmd_ref) {
pci_write_config32(dev, 0xdc, cmd);
needs_reset = 1;
}
}
else {
printk_err("Missing f0 device!\n");
}
if (needs_reset) {
printk_debug("resetting cpu\n");
hard_reset();
}
printk_debug("done.\n");
}
static struct device_operations mcf3_ops = {
.read_resources = mcf3_read_resources,
.set_resources = mcf3_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = misc_control_init,
.scan_bus = 0,
.ops_pci = 0,
};
static struct pci_driver mcf3_driver __pci_driver = {
.ops = &mcf3_ops,
.vendor = PCI_VENDOR_ID_AMD,
.device = 0x1103,
};
|
