#ifndef int_header
#define int_header

#include <stdint.h>
#include <stddef.h>



void usleep(unsigned int us);
void init_interrupts_bsp();

typedef uint32_t *lapic_t;

//this is only for madt; do we really need it here?
struct ioapic_t {
  void *address;
  unsigned int gsi_base;
  unsigned int gsi_count;
};

//future: if we start to do things like this more then once,
struct ioapic_fixedlen {
  size_t count;
  struct ioapic_t *ioapic;
};

//TODO change name
struct apic_vt {
  uint8_t vector;
  unsigned int delivery_mode:3;
  unsigned int dest_mode:1;
  unsigned int delivery_status:1;
  unsigned int polarity:1; //0 = high, 1 = low.
  unsigned int remote_irr:1;
  unsigned int trigger_mode:1;
  unsigned int mask:1;
  unsigned long int reserved:40;
  unsigned int destination:7;
} __attribute__((packed));


//simplified idt_descriptor makes things easier
struct idt_entry {
  void *addr;
  unsigned int ist:3;
  unsigned int type:4;
  unsigned int priv:2;
};

#define IOAPIC_REDIRECT_FIXED(vector, destination) \
  ((struct apic_vt) { \
   .vector = vector,			    \
   .delivery_mode = 0,			  \
   .dest_mode = 0,			      \
   .polarity = 0,			        \
   .remote_irr = 0,			      \
   .trigger_mode = 0,			    \
   .mask = 0,			            \
   .destination = destination \
})

#define KERNEL_IDT_GATE(isr) \
  ((struct idt_entry) {         \
   .addr = isr,                \
   .ist = 0,                    \
   .type = INT_GATE_64,         \
   .priv = 0                    \
})

#define TASK_GATE_64  0x5
#define INT_GATE_64   0xe
#define TRAP_GATE_64  0xf

#define SPURRIOUS_VECTOR 255


void create_fixed_interrupt(unsigned int irq, struct apic_vt *redirect);
void clear_int();
unsigned int alloc_idt(struct idt_entry *entry);
void free_idt(unsigned int entry);
void modify_idt(struct idt_entry *entry, unsigned int vector);
void smp_load_idt();


#endif