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/* $OpenBSD: vm86.h,v 1.10 2011/06/25 19:20:41 jsg Exp $ */
/* $NetBSD: vm86.h,v 1.8 1996/05/03 19:26:32 christos Exp $ */
#undef VM86_USE_VIF
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by John T. Kohl and Charles M. Hannum.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#define SETFLAGS(targ, new, newmask) (targ) = ((targ) & ~(newmask)) | ((new) & (newmask))
#define VM86_TYPE(x) ((x) & 0xff)
#define VM86_ARG(x) (((x) & 0xff00) >> 8)
#define VM86_MAKEVAL(type,arg) ((type) | (((arg) & 0xff) << 8))
#define VM86_STI 0
#define VM86_INTx 1
#define VM86_SIGNAL 2
#define VM86_UNKNOWN 3
#define VM86_REALFLAGS (~PSL_USERSTATIC)
#define VM86_VIRTFLAGS (PSL_USERSTATIC & ~(PSL_MBO | PSL_MBZ))
struct vm86_regs {
struct sigcontext vmsc;
};
struct vm86_kern { /* kernel uses this stuff */
struct vm86_regs regs;
unsigned long ss_cpu_type;
};
#define cpu_type substr.ss_cpu_type
/*
* Kernel keeps copy of user-mode address of this, but doesn't copy it in.
*/
struct vm86_struct {
struct vm86_kern substr;
unsigned long screen_bitmap; /* not used/supported (yet) */
unsigned long flags; /* not used/supported (yet) */
unsigned char int_byuser[32]; /* 256 bits each: pass control to user */
unsigned char int21_byuser[32]; /* otherwise, handle directly */
};
#define VCPU_086 0
#define VCPU_186 1
#define VCPU_286 2
#define VCPU_386 3
#define VCPU_486 4
#define VCPU_586 5
#ifdef _KERNEL
int i386_vm86(struct proc *, char *, register_t *);
void vm86_gpfault(struct proc *, int);
void vm86_return(struct proc *, int);
static __inline void clr_vif(struct proc *);
static __inline void set_vif(struct proc *);
static __inline void set_vflags(struct proc *, int);
static __inline int get_vflags(struct proc *);
static __inline void set_vflags_short(struct proc *, int);
static __inline int get_vflags_short(struct proc *);
static __inline void
clr_vif(p)
struct proc *p;
{
struct pcb *pcb = &p->p_addr->u_pcb;
#ifndef VM86_USE_VIF
pcb->vm86_eflags &= ~PSL_I;
#else
pcb->vm86_eflags &= ~PSL_VIF;
#endif
}
static __inline void
set_vif(struct proc *p)
{
struct pcb *pcb = &p->p_addr->u_pcb;
#ifndef VM86_USE_VIF
pcb->vm86_eflags |= PSL_I;
if ((pcb->vm86_eflags & (PSL_I|PSL_VIP)) == (PSL_I|PSL_VIP))
#else
pcb->vm86_eflags |= PSL_VIF;
if ((pcb->vm86_eflags & (PSL_VIF|PSL_VIP)) == (PSL_VIF|PSL_VIP))
#endif
vm86_return(p, VM86_STI);
}
static __inline void
set_vflags(struct proc *p, int flags)
{
struct trapframe *tf = p->p_md.md_regs;
struct pcb *pcb = &p->p_addr->u_pcb;
flags &= ~pcb->vm86_flagmask;
SETFLAGS(pcb->vm86_eflags, flags, VM86_VIRTFLAGS);
SETFLAGS(tf->tf_eflags, flags, VM86_REALFLAGS);
#ifndef VM86_USE_VIF
if ((pcb->vm86_eflags & (PSL_I|PSL_VIP)) == (PSL_I|PSL_VIP))
#else
if ((pcb->vm86_eflags & (PSL_VIF|PSL_VIP)) == (PSL_VIF|PSL_VIP))
#endif
vm86_return(p, VM86_STI);
}
static __inline int
get_vflags(struct proc *p)
{
struct trapframe *tf = p->p_md.md_regs;
struct pcb *pcb = &p->p_addr->u_pcb;
int flags = PSL_MBO;
SETFLAGS(flags, pcb->vm86_eflags, VM86_VIRTFLAGS);
SETFLAGS(flags, tf->tf_eflags, VM86_REALFLAGS);
return (flags);
}
static __inline void
set_vflags_short(struct proc *p, int flags)
{
struct trapframe *tf = p->p_md.md_regs;
struct pcb *pcb = &p->p_addr->u_pcb;
flags &= ~pcb->vm86_flagmask;
SETFLAGS(pcb->vm86_eflags, flags, VM86_VIRTFLAGS & 0xffff);
SETFLAGS(tf->tf_eflags, flags, VM86_REALFLAGS & 0xffff);
#ifndef VM86_USE_VIF
if ((pcb->vm86_eflags & (PSL_I|PSL_VIP)) == (PSL_I|PSL_VIP))
vm86_return(p, VM86_STI);
#endif
}
static __inline int
get_vflags_short(struct proc *p)
{
struct trapframe *tf = p->p_md.md_regs;
struct pcb *pcb = &p->p_addr->u_pcb;
int flags = PSL_MBO;
SETFLAGS(flags, pcb->vm86_eflags, VM86_VIRTFLAGS & 0xffff);
SETFLAGS(flags, tf->tf_eflags, VM86_REALFLAGS & 0xffff);
return (flags);
}
#else
int i386_vm86(struct vm86_struct *vmcp);
#endif
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