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/*-
* Written by paradox <ddkprog@yahoo.com>
* Public domain.
*
* x86 registers were borrowed from x86emu.h x86emu_regs.h
* for compatability.
*
* $FreeBSD$
*/
#ifndef _X86BIOS_H_
#define _X86BIOS_H_
#include <sys/types.h>
#include <sys/endian.h>
#include <sys/systm.h>
#ifdef __BIG_ENDIAN__
struct x86_register32 {
uint32_t e_reg;
};
struct x86_register16 {
uint16_t filler0;
uint16_t x_reg;
};
struct x86_register8 {
uint8_t filler0, filler1;
uint8_t h_reg, l_reg;
};
#else /* !__BIG_ENDIAN__ */
struct x86_register32 {
uint32_t e_reg;
};
struct x86_register16 {
uint16_t x_reg;
};
struct x86_register8 {
uint8_t l_reg, h_reg;
};
#endif /* __BIG_ENDIAN__ */
union x86_register {
struct x86_register32 I32_reg;
struct x86_register16 I16_reg;
struct x86_register8 I8_reg;
};
struct x86regs {
uint16_t padding; /* CS is unused. */
uint16_t register_ds;
uint16_t register_es;
uint16_t register_fs;
uint16_t register_gs;
uint16_t register_ss;
uint32_t register_flags;
union x86_register register_a;
union x86_register register_b;
union x86_register register_c;
union x86_register register_d;
union x86_register register_sp;
union x86_register register_bp;
union x86_register register_si;
union x86_register register_di;
};
typedef struct x86regs x86regs_t;
/* 8 bit registers */
#define R_AH register_a.I8_reg.h_reg
#define R_AL register_a.I8_reg.l_reg
#define R_BH register_b.I8_reg.h_reg
#define R_BL register_b.I8_reg.l_reg
#define R_CH register_c.I8_reg.h_reg
#define R_CL register_c.I8_reg.l_reg
#define R_DH register_d.I8_reg.h_reg
#define R_DL register_d.I8_reg.l_reg
/* 16 bit registers */
#define R_AX register_a.I16_reg.x_reg
#define R_BX register_b.I16_reg.x_reg
#define R_CX register_c.I16_reg.x_reg
#define R_DX register_d.I16_reg.x_reg
/* 32 bit extended registers */
#define R_EAX register_a.I32_reg.e_reg
#define R_EBX register_b.I32_reg.e_reg
#define R_ECX register_c.I32_reg.e_reg
#define R_EDX register_d.I32_reg.e_reg
/* special registers */
#define R_SP register_sp.I16_reg.x_reg
#define R_BP register_bp.I16_reg.x_reg
#define R_SI register_si.I16_reg.x_reg
#define R_DI register_di.I16_reg.x_reg
#define R_FLG register_flags
/* special registers */
#define R_ESP register_sp.I32_reg.e_reg
#define R_EBP register_bp.I32_reg.e_reg
#define R_ESI register_si.I32_reg.e_reg
#define R_EDI register_di.I32_reg.e_reg
#define R_EFLG register_flags
/* segment registers */
#define R_DS register_ds
#define R_SS register_ss
#define R_ES register_es
#define R_FS register_fs
#define R_GS register_gs
#define SEG_ADDR(x) (((x) >> 4) & 0x00F000)
#define SEG_OFF(x) ((x) & 0x0FFFF)
#define FARP(x) ((le32toh(x) & 0xffff) + ((le32toh(x) >> 12) & 0xffff00))
#define MAPPED_MEMORY_SIZE (1024 * 1024)
#define PAGE_RESERV (4096 * 5)
__BEGIN_DECLS
void *x86bios_alloc(int count, int *segs);
void x86bios_free(void *pbuf, int count);
void x86bios_intr(struct x86regs *regs, int intno);
void *x86bios_offset(uint32_t offs);
__END_DECLS
#endif /* !_X86BIOS_H_ */
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