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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <arch/hpet.h>
#include <cbmem.h>
#include <console/console.h>
#include <commonlib/bsd/helpers.h>
#include <device/pci_def.h>
#include <device/pci_ops.h>
#include <stdint.h>
#include <device/device.h>
#include <boot/tables.h>
#include <acpi/acpi.h>
#include <northbridge/intel/pineview/pineview.h>
#include <cpu/intel/smm_reloc.h>
#include <cpu/x86/smm.h>
/*
* 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)
{
mmio_range(dev, index++, HPET_BASE_ADDRESS, 0x00100000);
mmio_from_to(dev, index++, 0xa0000, 0xc0000);
reserved_ram_from_to(dev, index++, 0xc0000, 1 * MiB);
}
static void mch_domain_read_resources(struct device *dev)
{
u64 tom, touud;
u32 tolud;
u16 index;
struct device *mch = pcidev_on_root(0, 0);
index = 3;
pci_domain_read_resources(dev);
/* Top of Upper Usable DRAM, including remap */
touud = pci_read_config16(mch, TOUUD);
touud <<= 20;
/* Top of Lower Usable DRAM */
tolud = pci_read_config16(mch, TOLUD) & 0xfff0;
tolud <<= 16;
/* Top of Memory - does not account for any UMA */
tom = pci_read_config16(mch, TOM) & 0x01ff;
tom <<= 27;
printk(BIOS_DEBUG, "TOUUD 0x%llx TOLUD 0x%08x TOM 0x%llx ", touud, tolud, tom);
/* Graphics memory */
const u16 ggc = pci_read_config16(mch, GGC);
const u32 gms_size = decode_igd_memory_size((ggc >> 4) & 0xf) * KiB;
printk(BIOS_DEBUG, "%uM UMA", gms_size / MiB);
/* GTT Graphics Stolen Memory Size (GGMS) */
const u32 gsm_size = decode_igd_gtt_size((ggc >> 8) & 0xf) * KiB;
printk(BIOS_DEBUG, " and %uM GTT\n", gsm_size / MiB);
const u32 igd_base = pci_read_config32(mch, GBSM);
const u32 gtt_base = pci_read_config32(mch, BGSM);
/* Report the memory regions */
ram_range(dev, index++, 0, 0xa0000);
ram_from_to(dev, index++, 1 * MiB, cbmem_top());
uintptr_t tseg_base;
size_t tseg_size;
smm_region(&tseg_base, &tseg_size);
mmio_range(dev, index++, tseg_base, tseg_size);
mmio_range(dev, index++, gtt_base, gsm_size);
mmio_range(dev, index++, igd_base, gms_size);
printk(BIOS_DEBUG, "Unused RAM between cbmem_top and TOM: 0x%lx\n",
tseg_base - cbmem_top());
reserved_ram_from_to(dev, index++, cbmem_top(), tseg_base);
/*
* If > 4GB installed then memory from TOLUD to 4GB
* is remapped above TOM, TOUUD will account for both
*/
upper_ram_end(dev, index++, touud);
mmconf_resource(dev, index++);
add_fixed_resources(dev, index);
}
void northbridge_write_smram(u8 smram)
{
struct device *dev = pcidev_on_root(0, 0);
if (!dev)
die("could not find pci 00:00.0!\n");
pci_write_config8(dev, SMRAM, smram);
}
static void mch_domain_set_resources(struct device *dev)
{
struct resource *res;
for (res = dev->resource_list; res; res = res->next)
report_resource_stored(dev, res, "");
assign_resources(dev->downstream);
}
static void mch_domain_init(struct device *dev)
{
/* Enable SERR */
pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_SERR);
}
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;
}
static struct device_operations pci_domain_ops = {
.read_resources = mch_domain_read_resources,
.set_resources = mch_domain_set_resources,
.init = mch_domain_init,
.scan_bus = pci_host_bridge_scan_bus,
.acpi_fill_ssdt = generate_cpu_entries,
.acpi_name = northbridge_acpi_name,
};
static struct device_operations cpu_bus_ops = {
.read_resources = noop_read_resources,
.set_resources = noop_set_resources,
.init = mp_cpu_bus_init,
};
static void enable_dev(struct device *dev)
{
/* Set the operations if it is a special bus type */
if (dev->path.type == DEVICE_PATH_DOMAIN) {
dev->ops = &pci_domain_ops;
} else if (dev->path.type == DEVICE_PATH_CPU_CLUSTER) {
dev->ops = &cpu_bus_ops;
}
}
struct chip_operations northbridge_intel_pineview_ops = {
.name = "Intel Pineview Northbridge",
.enable_dev = enable_dev,
};
|
