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#if !__AS386_16__

#ifndef _SYS_VM86_H

#define _SYS_VM86_H

#include <features.h>

#ifndef _LINUX_VM86_H

#define _LINUX_VM86_H

/*

 * I'm guessing at the VIF/VIP flag usage, but hope that this is how

 * the Pentium uses them. Linux will return from vm86 mode when both

 * VIF and VIP is set.

 *

 * On a Pentium, we could probably optimize the virtual flags directly

 * in the eflags register instead of doing it "by hand" in vflags...

 *

 * Linus

 */

#define TF_MASK         0x00000100

#define IF_MASK         0x00000200

#define IOPL_MASK       0x00003000

#define NT_MASK         0x00004000

#define VM_MASK         0x00020000

#define AC_MASK         0x00040000

#define VIF_MASK        0x00080000      /* virtual interrupt flag */

#define VIP_MASK        0x00100000      /* virtual interrupt pending */

#define ID_MASK         0x00200000

#define BIOSSEG         0x0f000

#define CPU_086         0

#define CPU_186         1

#define CPU_286         2

#define CPU_386         3

#define CPU_486         4

#define CPU_586         5

/*

 * Return values for the 'vm86()' system call

 */

#define VM86_TYPE(retval)       ((retval) & 0xff)

#define VM86_ARG(retval)        ((retval) >> 8)

#define VM86_SIGNAL     0        /* return due to signal */

#define VM86_UNKNOWN    1       /* unhandled GP fault - IO-instruction or similar */

#define VM86_INTx       2       /* int3/int x instruction (ARG = x) */

#define VM86_STI        3       /* sti/popf/iret instruction enabled virtual interrupts */

/*

 * This is the stack-layout when we have done a "SAVE_ALL" from vm86

 * mode - the main change is that the old segment descriptors aren't

 * useful any more and are forced to be zero by the kernel (and the

 * hardware when a trap occurs), and the real segment descriptors are

 * at the end of the structure. Look at ptrace.h to see the "normal"

 * setup.

 */

struct vm86_regs {

/*

 * normal regs, with special meaning for the segment descriptors..

 */

        long ebx;

        long ecx;

        long edx;

        long esi;

        long edi;

        long ebp;

        long eax;

        long __null_ds;

        long __null_es;

        long __null_fs;

        long __null_gs;

        long orig_eax;

        long eip;

        unsigned short cs, __csh;

        long eflags;

        long esp;

        unsigned short ss, __ssh;

/*

 * these are specific to v86 mode:

 */

        unsigned short es, __esh;

        unsigned short ds, __dsh;

        unsigned short fs, __fsh;

        unsigned short gs, __gsh;

};

struct revectored_struct {

        unsigned long __map[8];                 /* 256 bits */

};

struct vm86_struct {

        struct vm86_regs regs;

        unsigned long flags;

        unsigned long screen_bitmap;

        unsigned long cpu_type;

        struct revectored_struct int_revectored;

        struct revectored_struct int21_revectored;

};

/*

 * flags masks

 */

#define VM86_SCREEN_BITMAP      0x0001

#ifdef __KERNEL__

void handle_vm86_fault(struct vm86_regs *, long);

void handle_vm86_debug(struct vm86_regs *, long);

#endif

#endif

__BEGIN_DECLS

extern vm86(struct vm86_struct * __info);

__END_DECLS

#endif /*_SYS_VM86_H */

#endif