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#ifndef THREADS_INTERRUPT_H
#define THREADS_INTERRUPT_H
#include <stdbool.h>
#include <stdint.h>
/* Interrupts on or off? */
enum intr_level
{
INTR_OFF, /* Interrupts disabled. */
INTR_ON /* Interrupts enabled. */
};
enum intr_level intr_get_level (void);
enum intr_level intr_set_level (enum intr_level);
enum intr_level intr_enable (void);
enum intr_level intr_disable (void);
/* Interrupt stack frame. */
struct intr_frame
{
/* Pushed by intr_entry in intr-stubs.S.
These are the interrupted task's saved registers. */
uint32_t edi; /* Saved EDI. */
uint32_t esi; /* Saved ESI. */
uint32_t ebp; /* Saved EBP. */
uint32_t esp_dummy; /* Not used. */
uint32_t ebx; /* Saved EBX. */
uint32_t edx; /* Saved EDX. */
uint32_t ecx; /* Saved ECX. */
uint32_t eax; /* Saved EAX. */
uint16_t gs, :16; /* Saved GS segment register. */
uint16_t fs, :16; /* Saved FS segment register. */
uint16_t es, :16; /* Saved ES segment register. */
uint16_t ds, :16; /* Saved DS segment register. */
/* Pushed by intrNN_stub in intr-stubs.S. */
uint32_t vec_no; /* Interrupt vector number. */
/* Sometimes pushed by the CPU,
otherwise for consistency pushed as 0 by intrNN_stub.
The CPU puts it just under `eip', but we move it here. */
uint32_t error_code; /* Error code. */
/* Pushed by intrNN_stub in intr-stubs.S.
This frame pointer eases interpretation of backtraces. */
void *frame_pointer; /* Saved EBP (frame pointer). */
/* Pushed by the CPU.
These are the interrupted task's saved registers. */
void (*eip) (void); /* Next instruction to execute. */
uint16_t cs, :16; /* Code segment for eip. */
uint32_t eflags; /* Saved CPU flags. */
void *esp; /* Saved stack pointer. */
uint16_t ss, :16; /* Data segment for esp. */
};
typedef void intr_handler_func (struct intr_frame *);
void intr_init (void);
void intr_register_ext (uint8_t vec, intr_handler_func *, const char *name);
void intr_register_int (uint8_t vec, int dpl, enum intr_level,
intr_handler_func *, const char *name);
bool intr_context (void);
void intr_yield_on_return (void);
void intr_dump_frame (const struct intr_frame *);
const char *intr_name (uint8_t vec);
#endif /* threads/interrupt.h */
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