blob: a2d261accf5f4aebf09398a810696e6daba22a67 (
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
|
#ifndef INTERRUPTS_H
#define INTERRUPTS_H
#include <stdint.h>
// TCC 0.9.26 bug?, __attribute__( ( packed ) ) on structs not working,
// also not working on members.. resorting to pragmas
#if defined( __TINYC__ )
#pragma pack(1)
#endif
// packed IDT structure, note TCC needs every member to have a packed
// attribute, GCC/Clang are happy with the packed attribute at the
// structure level
typedef struct interrupt_gate_descriptor_t {
uint16_t handler_address_low_bits;
uint16_t gdt_code_segment_selector;
uint8_t reserved;
uint8_t access;
uint16_t handler_address_high_bits;
} __attribute__( ( packed ) ) interrupt_gate_descriptor_t;
#if defined( __TINYC__ )
#pragma pack()
#endif
#define NOF_INTERRUPT_GATES 256
typedef struct {
interrupt_gate_descriptor_t descriptor_table[NOF_INTERRUPT_GATES];
} interrupt_t;
#if defined( __TINYC__ )
#pragma pack(1)
#endif
typedef struct {
uint16_t size;
uint32_t base;
} __attribute__( ( packed ) ) interrupt_descriptor_table_pointer_t;
#if defined( __TINYC__ )
#pragma pack()
#endif
void interrupts_enable( void );
void interrupts_disable( void );
void interrupts_init( interrupt_t *interrupt );
void interrupts_register_interrupt( interrupt_t *interrupt,
uint8_t interrupt_no, uint16_t gdt_code_segment_selector,
void (*handler)( ), uint8_t privilege_level, uint8_t descriptor_type );
void interrupts_load_idt( interrupt_descriptor_table_pointer_t *idt_pointer );
uint32_t interrupts_handle_interrupt( uint8_t interrupt_no, uint32_t esp );
void interrupts_ignore_request( );
void interrupts_handle_request_0x00( );
// initialize IDT
// handle gates
// assembly trampolines calling C (static) functions
// later: tasks and stacks, queues
#endif // INTERRUPTS_H
|
