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
|
#include <rsdp.h>
#include <heap.h>
#include <paging.h>
#include <libk/string.h>
#include <libk/stdio.h>
uint64_t *find_rsdp()
{
const char *rsdp_cs = "RSD PTR ";
uint64_t i;
size_t j;
char *x;
uint8_t ind;
map_addr(0x0, 0x0, FLAG_PRESENT);
for (i = 0x10; i < 0x100000; i += 0x10) {
x = (char *)i;
ind = 1;
for (j = 0; j < strlen(rsdp_cs); j++) {
if (rsdp_cs[j] != x[j]) {
ind = 0;
break;
}
}
if (ind) {
return (uint64_t *)i;
}
}
return NULL;
}
void list_sys_tables(void)
{
uint64_t *rsdp = find_rsdp();
struct RSDP_descriptor *rsdp_desc;
struct ACPI_header *rsdt;
uint32_t entries;
size_t i;
size_t j;
uint32_t na_addr;
uint32_t addr;
struct ACPI_header *t;
if (rsdp == NULL) {
printf("RSDP NOT FOUND\n");
return;
}
rsdp_desc = (struct RSDP_descriptor *)rsdp;
map_addr(rsdp_desc->RsdtAddress, rsdp_desc->RsdtAddress, FLAG_PRESENT);
rsdt = (struct ACPI_header *)kalloc(sizeof(struct ACPI_header));
memcpy(rsdt, (uint64_t *)(uint64_t)rsdp_desc->RsdtAddress,
sizeof(struct ACPI_header));
entries = (rsdt->Length - (uint32_t)sizeof(struct ACPI_header)) / 4;
for (i = 0; i < entries; i++) {
na_addr = (uint32_t)rsdp_desc->RsdtAddress +
(uint32_t)sizeof(struct ACPI_header) +
(uint32_t)i * 4;
memcpy(&addr, (uint64_t *)(uint64_t)na_addr, 4);
t = (struct ACPI_header *)kalloc(sizeof(struct ACPI_header));
memcpy(t, (uint64_t *)(uint64_t)addr,
sizeof(struct ACPI_header));
for (j = 0; j < 4; j++) {
printf("%c", t->Signature[j]);
}
printf(", ");
kfree(t);
}
printf("\n");
kfree(rsdt);
}
uint64_t *find_sys_table_addr(const char *signature)
{
uint64_t *rsdp = find_rsdp();
struct RSDP_descriptor *rsdp_desc;
struct ACPI_header *rsdt;
uint32_t entries;
size_t i;
size_t j;
uint32_t addr;
struct ACPI_header *t;
uint8_t ind = 1;
if (rsdp == NULL) {
printf("RSDP NOT FOUND\n");
return NULL;
}
rsdp_desc = (struct RSDP_descriptor *)rsdp;
map_addr(rsdp_desc->RsdtAddress, rsdp_desc->RsdtAddress, FLAG_PRESENT);
rsdt = (struct ACPI_header *)kalloc(sizeof(struct ACPI_header));
memcpy(rsdt, (uint64_t *)(uint64_t)rsdp_desc->RsdtAddress,
sizeof(struct ACPI_header));
entries = (rsdt->Length - (uint32_t)sizeof(struct ACPI_header)) / 4;
for (i = 0; i < entries; i++) {
uint32_t na_addr = (uint32_t)rsdp_desc->RsdtAddress +
(uint32_t)sizeof(struct ACPI_header) +
(uint32_t)i * 4;
memcpy(&addr, (uint64_t *)(uint64_t)na_addr, 4);
t = (struct ACPI_header *)kalloc(sizeof(struct ACPI_header));
memcpy(t, (uint64_t *)(uint64_t)addr,
sizeof(struct ACPI_header));
ind = 1;
for (j = 0; j < 4; j++) {
if (t->Signature[j] != signature[j])
ind = 0;
}
if (ind) {
kfree(t);
kfree(rsdt);
return (uint64_t *)(uint64_t)addr;
}
kfree(t);
}
kfree(rsdt);
return NULL;
}
|
