realmode_int.h

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/*
 * Copyright (C) 2014  Jan Doležal (dolezj21@fel.cvut.cz)
 *                     CTU in Prague.
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.org/license/LICENSE.
 */

#ifndef _REALMODE_INT_H
#define _REALMODE_INT_H

#include <rtems/score/cpu.h>
#include <stdint.h>

#ifndef ASM /* ASM */

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

/* --- BIOS service interrupt number --- */
/* number of interrupt servicing video functions */
#define INTERRUPT_NO_VIDEO_SERVICES 0x10

typedef struct {
    uint32_t reg_eax;
    uint32_t reg_ebx;
    uint32_t reg_ecx;
    uint32_t reg_edx;
    uint32_t reg_esi;
    uint32_t reg_edi;
    uint16_t reg_ds;
    uint16_t reg_es;
    uint16_t reg_fs;
    uint16_t reg_gs;
} RTEMS_PACKED i386_realmode_interrupt_registers;

extern void *i386_get_default_rm_buffer(uint16_t *size);

extern int i386_real_interrupt_call(
    uint8_t interrupt_number,
    i386_realmode_interrupt_registers *ir
);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* ASM */

#endif /* _REALMODE_INT_H */