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#ifndef INTERRUPTS_H
#define INTERRUPTS_H
#include <stdint.h>
// TCC bug (TODO: check, still there?), gcc croaks about
// member pack alignments of things which cannot be packed like
// uint8_t, so we define a macro depending on the compiler
#if defined( __clang__ )
#define MEMBER_ATTRIBUTE_PACKED
#endif
#if defined( __GNUC__ )
#define MEMBER_ATTRIBUTE_PACKED
#endif
#if defined( __TINYC__ )
#define MEMBER_ATTRIBUTE_PACKED __attribute__( ( packed ) )
#endif
// packed IDT structure, note TCC needs every member to have a packed
// attribute, GCC/Clang are happy with the packed attribute at the
// structure level
typedef struct {
uint16_t handler_address_low_bits MEMBER_ATTRIBUTE_PACKED;
uint16_t gdt_code_segment_selector MEMBER_ATTRIBUTE_PACKED;
uint8_t reserved MEMBER_ATTRIBUTE_PACKED;
uint8_t access MEMBER_ATTRIBUTE_PACKED;
uint16_t handler_address_high_bits MEMBER_ATTRIBUTE_PACKED;
} __attribute__( ( packed ) ) interrupt_gate_descriptor_t;
#define NOF_INTERRUPT_GATES 256
typedef struct {
interrupt_gate_descriptor_t descriptor_table[NOF_INTERRUPT_GATES];
} interrupt_t;
typedef struct {
uint16_t size MEMBER_ATTRIBUTE_PACKED;
uint32_t base MEMBER_ATTRIBUTE_PACKED;
} __attribute__( ( packed ) ) interrupt_descriptor_table_pointer_t;
void interrupts_enable( void );
void interrupts_disable( void );
void interrupts_init( interrupt_t *interrupt );
void interrupts_register_interrupt( interrupt_t *interrupt,
uint8_t interrupt_no, uint16_t gdt_code_segment_selector,
void (*handler)( ), uint8_t privilege_level, uint8_t descriptor_type );
void interrupts_load_idt( interrupt_descriptor_table_pointer_t *idt_pointer );
uint32_t interrupts_handle_interrupt( uint8_t interrupt_no, uint32_t esp );
void interrupts_ignore_request( );
void interrupts_handle_request_0x00( );
// initialize IDT
// handle gates
// assembly trampolines calling C (static) functions
// later: tasks and stacks, queues
#endif // INTERRUPTS_H
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