kern

view src/intr.h @ 54:4eaecb14fe31

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bringing the task switching thing into shape with proper per-process kernel stacks and shit
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 14 Aug 2011 16:57:23 +0300
parents fa65b4f45366
children
line source
1 #ifndef INTR_H_
2 #define INTR_H_
3
4 #include <inttypes.h>
5 #include "asmops.h"
6
7 /* offset used to remap IRQ numbers (+32) */
8 #define IRQ_OFFSET 32
9 /* conversion macros between IRQ and interrupt numbers */
10 #define IRQ_TO_INTR(x) ((x) + IRQ_OFFSET)
11 #define INTR_TO_IRQ(x) ((x) - IRQ_OFFSET)
12 /* checks whether a particular interrupt is an remapped IRQ */
13 #define IS_IRQ(n) ((n) >= IRQ_OFFSET && (n) < IRQ_OFFSET + 16)
14
15 /* structure used to pass the interrupt stack frame from the
16 * entry points to the C dispatch function.
17 */
18 struct intr_frame {
19 /* registers pushed by pusha in intr_entry_* */
20 struct registers regs;
21 /* data segment selectors */
22 uint32_t ds, es, fs, gs;
23 /* interrupt number and error code pushed in intr_entry_* */
24 uint32_t inum, err;
25 /* pushed by CPU during interrupt entry */
26 uint32_t eip, cs, eflags;
27 /* pushed by CPU during interrupt entry from user space */
28 uint32_t esp, ss;
29 } __attribute__ ((packed));
30
31
32
33 typedef void (*intr_func_t)(int);
34
35
36 void init_intr(void);
37
38 struct intr_frame *get_intr_frame(void);
39
40 void interrupt(int intr_num, intr_func_t func);
41
42 /* defined in intr-asm.S */
43 int get_intr_state(void);
44 void set_intr_state(int s);
45
46 void intr_ret(struct intr_frame ifrm);
47
48 void end_of_irq(int irq);
49
50 #endif /* INTR_H_ */