blob: 86324a03c681016097f67831415d4faa98e701f8 (
plain)
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
|
//! CPU Control Operations
//! Processor state management and descriptor table operations
/// Halt processor until next interrupt
pub inline fn halt_processor() void {
asm volatile ("hlt");
}
/// Disable hardware interrupts
pub inline fn disable_interrupts() void {
asm volatile ("cli");
}
/// Enable hardware interrupts
pub inline fn enable_interrupts() void {
asm volatile ("sti");
}
/// Load Global Descriptor Table
pub inline fn load_global_descriptor_table(gdtr_address: u64) void {
asm volatile ("lgdt (%[gdtr])"
:
: [gdtr] "r" (gdtr_address),
);
}
/// Load Interrupt Descriptor Table
pub inline fn load_interrupt_descriptor_table(idtr_address: u64) void {
asm volatile ("lidt (%[idtr])"
:
: [idtr] "r" (idtr_address),
);
}
/// Load Task Register
pub inline fn load_task_register(selector: u16) void {
asm volatile ("ltr %[sel]"
:
: [sel] "r" (selector),
);
}
/// Reload all data segment registers with specified selector
pub inline fn reload_segment_registers(selector: u16) void {
asm volatile (
\\mov %[sel], %%ds
\\mov %[sel], %%es
\\mov %[sel], %%fs
\\mov %[sel], %%gs
\\mov %[sel], %%ss
:
: [sel] "r" (selector),
);
}
/// Reload code segment via far return (required after GDT change)
pub inline fn reload_code_segment(selector: u16) void {
asm volatile (
\\pushq %[sel]
\\leaq 1f(%%rip), %%rax
\\pushq %%rax
\\lretq
\\1:
:
: [sel] "r" (@as(u64, selector)),
: .{ .rax = true }
);
}
|
