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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <console/console.h>
#include <acpi/acpi.h>
#include <arch/hpet.h>
#include <device/pci_ops.h>
#include <stdint.h>
#include <cpu/intel/model_2065x/model_2065x.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include "chip.h"
#include <commonlib/bsd/helpers.h>
#include "ironlake.h"
#include <cpu/intel/smm_reloc.h>
static int bridge_revision_id = -1;
int bridge_silicon_revision(void)
{
if (bridge_revision_id < 0) {
uint8_t stepping = cpuid_eax(1) & 0x0f;
uint8_t bridge_id = pci_read_config16(pcidev_on_root(0, 0), PCI_DEVICE_ID);
bridge_revision_id = (bridge_id & 0xf0) | stepping;
}
return bridge_revision_id;
}
/*
* Reserve everything between A segment and 1MB:
*
* 0xa0000 - 0xbffff: legacy VGA
* 0xc0000 - 0xcffff: VGA OPROM (needed by kernel)
* 0xe0000 - 0xfffff: SeaBIOS, if used, otherwise DMI
*/
static void add_fixed_resources(struct device *dev, int index)
{
/* 0xe0000000-0xf0000000 PCIe config.
0xfed10000-0xfed14000 MCH
0xfed17000-0xfed18000 HECI
0xfed18000-0xfed19000 DMI
0xfed19000-0xfed1a000 EPBAR
0xfed1c000-0xfed20000 RCBA
0xfed90000-0xfed94000 IOMMU
0xff800000-0xffffffff ROM. */
mmio_range(dev, index++, HPET_BASE_ADDRESS, 0x00100000);
mmio_from_to(dev, index++, 0xa0000, 0xc0000);
reserved_ram_from_to(dev, index++, 0xc0000, 1 * MiB);
}
#if CONFIG(HAVE_ACPI_TABLES)
static const char *northbridge_acpi_name(const struct device *dev)
{
if (dev->path.type == DEVICE_PATH_DOMAIN)
return "PCI0";
if (!is_pci_dev_on_bus(dev, 0))
return NULL;
switch (dev->path.pci.devfn) {
case PCI_DEVFN(0, 0):
return "MCHC";
}
return NULL;
}
#endif
struct device_operations ironlake_pci_domain_ops = {
.read_resources = pci_domain_read_resources,
.set_resources = pci_domain_set_resources,
.scan_bus = pci_domain_scan_bus,
#if CONFIG(HAVE_ACPI_TABLES)
.acpi_name = northbridge_acpi_name,
#endif
};
static void mc_read_resources(struct device *dev)
{
uint32_t tseg_base, tseg_end;
uint64_t touud;
uint16_t reg16;
int index = 3;
pci_dev_read_resources(dev);
mmconf_resource(dev, 0x50);
tseg_base = pci_read_config32(pcidev_on_root(0, 0), TSEG);
tseg_end = tseg_base + CONFIG_SMM_TSEG_SIZE;
touud = pci_read_config16(pcidev_on_root(0, 0),
TOUUD);
printk(BIOS_DEBUG, "ram_before_4g_top: 0x%x\n", tseg_base);
printk(BIOS_DEBUG, "TOUUD: 0x%x\n", (unsigned int)touud);
/* Report the memory regions */
ram_range(dev, index++, 0, 0xa0000);
ram_from_to(dev, index++, 1 * MiB, tseg_base);
mmio_range(dev, index++, tseg_base, CONFIG_SMM_TSEG_SIZE);
reg16 = pci_read_config16(pcidev_on_root(0, 0), GGC);
const int uma_sizes_gtt[16] =
{ 0, 1, 0, 2, 0, 0, 0, 0, 0, 2, 3, 4, 42, 42, 42, 42 };
/* Igd memory */
const int uma_sizes_igd[16] = {
0, 0, 0, 0, 0, 32, 48, 64, 128, 256, 96, 160, 224, 352, 256, 512
};
u32 igd_base, gtt_base;
int uma_size_igd, uma_size_gtt;
uma_size_igd = uma_sizes_igd[(reg16 >> 4) & 0xF];
uma_size_gtt = uma_sizes_gtt[(reg16 >> 8) & 0xF];
igd_base =
pci_read_config32(pcidev_on_root(0, 0), IGD_BASE);
gtt_base =
pci_read_config32(pcidev_on_root(0, 0), GTT_BASE);
if (gtt_base > tseg_end) {
/* Reserve the gap. MMIO doesn't work in this range. Keep
it uncacheable, though, for easier MTRR allocation. */
mmio_from_to(dev, index++, tseg_end, gtt_base);
}
mmio_range(dev, index++, gtt_base, uma_size_gtt * MiB);
mmio_range(dev, index++, igd_base, uma_size_igd * MiB);
upper_ram_end(dev, index++, touud * MiB);
/* This memory is not DMA-capable. */
if (touud >= 8192 - 64)
bad_ram_range(dev, index++, 0x1fc000000ULL, 0x004000000);
add_fixed_resources(dev, index);
}
static void northbridge_init(struct device *dev)
{
/* Clear error status bits */
dmibar_write32(DMIUESTS, 0xffffffff);
dmibar_write32(DMICESTS, 0xffffffff);
dmibar_setbits32(DMILLTC, 1 << 29);
dmibar_setbits32(0x1f8, 1 << 16);
dmibar_setbits32(DMILCTL, 1 << 1 | 1 << 0);
}
/* Disable unused PEG devices based on devicetree before PCI enumeration */
static void ironlake_init(void *const chip_info)
{
u32 deven_mask = UINT32_MAX;
const struct device *dev;
dev = pcidev_on_root(1, 0);
if (!dev || !dev->enabled) {
printk(BIOS_DEBUG, "Disabling PEG10.\n");
deven_mask &= ~DEVEN_PEG10;
}
dev = pcidev_on_root(2, 0);
if (!dev || !dev->enabled) {
printk(BIOS_DEBUG, "Disabling IGD.\n");
deven_mask &= ~DEVEN_IGD;
}
const struct device *const d0f0 = pcidev_on_root(0, 0);
if (d0f0)
pci_update_config32(d0f0, DEVEN, deven_mask, 0);
}
static struct device_operations mc_ops = {
.read_resources = mc_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = northbridge_init,
.acpi_fill_ssdt = generate_cpu_entries,
.ops_pci = &pci_dev_ops_pci,
};
/*
* The host bridge PCI device ID can be changed by the firmware. There
* is no documentation about it, though. There's 'official' IDs, which
* appear in spec updates and Windows drivers, and 'mysterious' IDs,
* which Intel doesn't want OSes to know about and thus are not listed.
*
* The current coreboot code seems to be able to change the device ID
* of the host bridge, but it seems to be missing a warm reset so that
* the device ID changes. Account for the 'mysterious' device IDs in
* the northbridge driver, so that booting an OS has a chance to work.
*/
static const unsigned short pci_device_ids[] = {
/* 'Official' DIDs */
0x0040, /* Clarkdale */
0x0044, /* Arrandale */
0x0048, /* Unknown, but it appears in OS drivers and raminit */
/* Mysterious DIDs, taken from Linux' intel-agp driver */
0x0062, /* Arrandale A-? */
0x0069, /* Clarkdale K-0 */
0x006a, /* Arrandale K-0 */
0
};
static const struct pci_driver mc_driver_ilk __pci_driver = {
.ops = &mc_ops,
.vendor = PCI_VID_INTEL,
.devices = pci_device_ids,
};
struct device_operations ironlake_cpu_bus_ops = {
.read_resources = noop_read_resources,
.set_resources = noop_set_resources,
.init = mp_cpu_bus_init,
};
struct chip_operations northbridge_intel_ironlake_ops = {
CHIP_NAME("Intel Ironlake integrated Northbridge")
.init = ironlake_init,
};
|
