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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <console/console.h>
#include <cpu/cpu.h>
#include <cpu/x86/msr.h>
#include <cpu/x86/mtrr.h>
#include <stdint.h>
static const char *display_mtrr_type(uint32_t type)
{
switch (type) {
default: return "reserved";
case 0: return "UC";
case 1: return "WC";
case 4: return "WT";
case 5: return "WP";
case 6: return "WB";
case 7: return "UC-";
}
}
static void display_mtrr_fixed_types(msr_t msr_data,
uint32_t starting_address, uint32_t memory_size)
{
uint32_t base_address;
uint32_t index;
uint32_t next_address;
uint32_t next_type;
uint32_t type;
type = msr_data.raw & MTRR_DEF_TYPE_MASK;
base_address = starting_address;
next_address = base_address;
for (index = 0; index < 64; index += 8) {
next_address = starting_address + (memory_size *
((index >> 3) + 1));
next_type = (msr_data.raw >> index) & MTRR_DEF_TYPE_MASK;
if (next_type != type) {
printk(BIOS_DEBUG, " 0x%08x - 0x%08x: %s\n",
base_address, next_address - 1,
display_mtrr_type(type));
base_address = next_address;
type = next_type;
}
}
if (base_address != next_address)
printk(BIOS_DEBUG, " 0x%08x - 0x%08x: %s\n",
base_address, next_address - 1,
display_mtrr_type(type));
}
static void display_4k_mtrr(uint32_t msr_reg, uint32_t starting_address,
const char *name)
{
const msr_t msr = rdmsr(msr_reg);
printk(BIOS_DEBUG, "0x%016llx: %s\n", msr.raw, name);
display_mtrr_fixed_types(msr, starting_address, 0x1000);
}
static void display_16k_mtrr(uint32_t msr_reg, uint32_t starting_address,
const char *name)
{
const msr_t msr = rdmsr(msr_reg);
printk(BIOS_DEBUG, "0x%016llx: %s\n", msr.raw, name);
display_mtrr_fixed_types(msr, starting_address, 0x4000);
}
static void display_64k_mtrr(void)
{
const msr_t msr = rdmsr(MTRR_FIX_64K_00000);
printk(BIOS_DEBUG, "0x%016llx: IA32_MTRR_FIX64K_00000\n", msr.raw);
display_mtrr_fixed_types(msr, 0, 0x10000);
}
static void display_mtrrcap(void)
{
const msr_t msr = rdmsr(MTRR_CAP_MSR);
printk(BIOS_DEBUG,
"0x%08x%08x: IA32_MTRRCAP: %s%s%s%s%u variable MTRRs\n",
msr.hi, msr.lo,
(msr.lo & MTRR_CAP_PRMRR) ? "PRMRR, " : "",
(msr.lo & MTRR_CAP_SMRR) ? "SMRR, " : "",
(msr.lo & MTRR_CAP_WC) ? "WC, " : "",
(msr.lo & MTRR_CAP_FIX) ? "FIX, " : "",
msr.lo & MTRR_CAP_VCNT);
}
static void display_mtrr_def_type(void)
{
const msr_t msr = rdmsr(MTRR_DEF_TYPE_MSR);
printk(BIOS_DEBUG, "0x%016llx: IA32_MTRR_DEF_TYPE:%s%s %s\n",
msr.raw,
(msr.raw & MTRR_DEF_TYPE_EN) ? " E," : "",
(msr.raw & MTRR_DEF_TYPE_FIX_EN) ? " FE," : "",
display_mtrr_type((uint32_t)(msr.raw &
MTRR_DEF_TYPE_MASK)));
}
static void display_variable_mtrr(int index, uint64_t address_mask)
{
uint64_t base_address;
uint64_t length;
uint64_t mask;
const msr_t msr_a = rdmsr(MTRR_PHYS_BASE(index));
const msr_t msr_m = rdmsr(MTRR_PHYS_MASK(index));
if (msr_m.raw & MTRR_PHYS_MASK_VALID) {
base_address = (msr_a.raw & 0xfffffffffffff000ULL)
& address_mask;
printk(BIOS_DEBUG,
"0x%016llx: PHYBASE%d: Address = 0x%016llx, %s\n",
msr_a.raw, index, base_address,
display_mtrr_type(msr_a.raw & MTRR_DEF_TYPE_MASK));
mask = (msr_m.raw & 0xfffffffffffff000ULL) & address_mask;
length = (~mask & address_mask) + 1;
printk(BIOS_DEBUG,
"0x%016llx: PHYMASK%d: Length = 0x%016llx, Valid\n",
msr_m.raw, index, length);
} else {
printk(BIOS_DEBUG, "0x%016llx: PHYBASE%d\n", msr_a.raw, index);
printk(BIOS_DEBUG, "0x%016llx: PHYMASK%d: Disabled\n",
msr_m.raw, index);
}
}
static void _display_mtrrs(void)
{
uint32_t address_bits;
uint64_t address_mask;
int i;
int variable_mtrrs;
/* Display the fixed MTRRs */
display_mtrrcap();
display_mtrr_def_type();
display_64k_mtrr();
display_16k_mtrr(MTRR_FIX_16K_80000, 0x80000, "IA32_MTRR_FIX16K_80000");
display_16k_mtrr(MTRR_FIX_16K_A0000, 0xa0000, "IA32_MTRR_FIX16K_A0000");
display_4k_mtrr(MTRR_FIX_4K_C0000, 0xc0000, "IA32_MTRR_FIX4K_C0000");
display_4k_mtrr(MTRR_FIX_4K_C8000, 0xc8000, "IA32_MTRR_FIX4K_C8000");
display_4k_mtrr(MTRR_FIX_4K_D0000, 0xd0000, "IA32_MTRR_FIX4K_D0000");
display_4k_mtrr(MTRR_FIX_4K_D8000, 0xd8000, "IA32_MTRR_FIX4K_D8000");
display_4k_mtrr(MTRR_FIX_4K_E0000, 0xe0000, "IA32_MTRR_FIX4K_E0000");
display_4k_mtrr(MTRR_FIX_4K_E8000, 0xe8000, "IA32_MTRR_FIX4K_E8000");
display_4k_mtrr(MTRR_FIX_4K_F0000, 0xf0000, "IA32_MTRR_FIX4K_F0000");
display_4k_mtrr(MTRR_FIX_4K_F8000, 0xf8000, "IA32_MTRR_FIX4K_F8000");
address_bits = cpu_phys_address_size();
address_mask = (1ULL << address_bits) - 1;
/* Display the variable MTRRs */
variable_mtrrs = get_var_mtrr_count();
for (i = 0; i < variable_mtrrs; i++)
display_variable_mtrr(i, address_mask);
}
asmlinkage void display_mtrrs(void)
{
if (CONFIG(DISPLAY_MTRRS))
_display_mtrrs();
}
|
