kern
annotate src/intr.h @ 54:4eaecb14fe31
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 |
| rev | line source |
|---|---|
| nuclear@11 | 1 #ifndef INTR_H_ |
| nuclear@11 | 2 #define INTR_H_ |
| nuclear@11 | 3 |
| nuclear@11 | 4 #include <inttypes.h> |
| nuclear@25 | 5 #include "asmops.h" |
| nuclear@11 | 6 |
| nuclear@35 | 7 /* offset used to remap IRQ numbers (+32) */ |
| nuclear@35 | 8 #define IRQ_OFFSET 32 |
| nuclear@35 | 9 /* conversion macros between IRQ and interrupt numbers */ |
| nuclear@35 | 10 #define IRQ_TO_INTR(x) ((x) + IRQ_OFFSET) |
| nuclear@35 | 11 #define INTR_TO_IRQ(x) ((x) - IRQ_OFFSET) |
| nuclear@35 | 12 /* checks whether a particular interrupt is an remapped IRQ */ |
| nuclear@35 | 13 #define IS_IRQ(n) ((n) >= IRQ_OFFSET && (n) < IRQ_OFFSET + 16) |
| nuclear@35 | 14 |
| nuclear@47 | 15 /* structure used to pass the interrupt stack frame from the |
| nuclear@47 | 16 * entry points to the C dispatch function. |
| nuclear@47 | 17 */ |
| nuclear@47 | 18 struct intr_frame { |
| nuclear@47 | 19 /* registers pushed by pusha in intr_entry_* */ |
| nuclear@47 | 20 struct registers regs; |
| nuclear@54 | 21 /* data segment selectors */ |
| nuclear@54 | 22 uint32_t ds, es, fs, gs; |
| nuclear@47 | 23 /* interrupt number and error code pushed in intr_entry_* */ |
| nuclear@47 | 24 uint32_t inum, err; |
| nuclear@47 | 25 /* pushed by CPU during interrupt entry */ |
| nuclear@47 | 26 uint32_t eip, cs, eflags; |
| nuclear@47 | 27 /* pushed by CPU during interrupt entry from user space */ |
| nuclear@47 | 28 uint32_t esp, ss; |
| nuclear@49 | 29 } __attribute__ ((packed)); |
| nuclear@47 | 30 |
| nuclear@47 | 31 |
| nuclear@35 | 32 |
| nuclear@52 | 33 typedef void (*intr_func_t)(int); |
| nuclear@11 | 34 |
| nuclear@11 | 35 |
| nuclear@11 | 36 void init_intr(void); |
| nuclear@11 | 37 |
| nuclear@52 | 38 struct intr_frame *get_intr_frame(void); |
| nuclear@52 | 39 |
| nuclear@11 | 40 void interrupt(int intr_num, intr_func_t func); |
| nuclear@11 | 41 |
| nuclear@25 | 42 /* defined in intr-asm.S */ |
| nuclear@25 | 43 int get_intr_state(void); |
| nuclear@25 | 44 void set_intr_state(int s); |
| nuclear@25 | 45 |
| nuclear@47 | 46 void intr_ret(struct intr_frame ifrm); |
| nuclear@47 | 47 |
| nuclear@51 | 48 void end_of_irq(int irq); |
| nuclear@51 | 49 |
| nuclear@11 | 50 #endif /* INTR_H_ */ |