1 /*
2  * Copyright (c) 2012-2018 LK Trusty Authors. All Rights Reserved.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining
5  * a copy of this software and associated documentation files
6  * (the "Software"), to deal in the Software without restriction,
7  * including without limitation the rights to use, copy, modify, merge,
8  * publish, distribute, sublicense, and/or sell copies of the Software,
9  * and to permit persons to whom the Software is furnished to do so,
10  * subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice shall be
13  * included in all copies or substantial portions of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
18  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
19  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
20  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
21  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22  */
23 
24 #pragma once
25 
26 #include <platform/interrupts.h>
27 
28 #define INT_VECTORS 0x100
29 
30 #ifndef INT_PIT
31 #define INT_PIT 0x30
32 #endif
33 
34 #define PIC1_BASE_INTR INT_PIT
35 #define PIC2_CASCADE_INTR (PIC1_BASE_INTR + 2)
36 #define PIC2_BASE_INTR (PIC1_BASE_INTR + 8)
37 #define AFTER_PIC_INTR (PIC2_BASE_INTR + 8)
38 #define PIC1 0x20
39 #define PIC2 0xA0
40 #define ICW1 0x11 /* Cascade mode, ICW4 needed */
41 #define ICW3_PIC1 4
42 #define ICW3_PIC2 2
43 #define ICW4 0x5  /* Non buffered mode, 8086 mode */
44 #define PIC_EOI 0x20
45 
46 struct int_handler_struct {
47     int_handler handler;
48     void* arg;
49 };
50 
51 extern struct int_handler_struct int_handler_table[INT_VECTORS];
52 
53 void x86_init_interrupts(void);
54 enum handler_return default_isr(unsigned int vector);
55