168 lines
5.0 KiB
C
168 lines
5.0 KiB
C
/* $NetBSD: vm86.h,v 1.19 2009/11/21 03:11:01 rmind Exp $ */
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#undef VM86_USE_VIF
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/*-
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* Copyright (c) 1996 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by John T. Kohl and Charles M. Hannum.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#define SETFLAGS(targ, new, newmask) (targ) = ((targ) & ~(newmask)) | ((new) & (newmask))
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#define VM86_TYPE(x) ((x) & 0xff)
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#define VM86_ARG(x) (((x) & 0xff00) >> 8)
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#define VM86_MAKEVAL(type,arg) ((type) | (((arg) & 0xff) << 8))
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#define VM86_STI 0
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#define VM86_INTx 1
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#define VM86_SIGNAL 2
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#define VM86_UNKNOWN 3
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#define VM86_REALFLAGS (~PSL_USERSTATIC)
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#define VM86_VIRTFLAGS (PSL_USERSTATIC & ~(PSL_MBO | PSL_MBZ))
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struct vm86_kern { /* kernel uses this stuff */
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__gregset_t regs;
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unsigned long ss_cpu_type;
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};
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#define cpu_type substr.ss_cpu_type
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/*
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* Kernel keeps copy of user-mode address of this, but doesn't copy it in.
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*/
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struct vm86_struct {
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struct vm86_kern substr;
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unsigned long screen_bitmap; /* not used/supported (yet) */
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unsigned long flags; /* not used/supported (yet) */
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unsigned char int_byuser[32]; /* 256 bits each: pass control to user */
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unsigned char int21_byuser[32]; /* otherwise, handle directly */
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};
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#define VCPU_086 0
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#define VCPU_186 1
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#define VCPU_286 2
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#define VCPU_386 3
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#define VCPU_486 4
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#define VCPU_586 5
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#ifdef _KERNEL
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int x86_vm86(struct lwp *, char *, register_t *);
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int compat_16_x86_vm86(struct lwp *, char *, register_t *);
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void vm86_gpfault(struct lwp *, int);
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void vm86_return(struct lwp *, int);
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static __inline void clr_vif(struct lwp *);
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static __inline void set_vif(struct lwp *);
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static __inline void set_vflags(struct lwp *, int);
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static __inline int get_vflags(struct lwp *);
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static __inline void set_vflags_short(struct lwp *, int);
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static __inline int get_vflags_short(struct lwp *);
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static __inline void
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clr_vif(struct lwp *l)
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{
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struct pcb *pcb = lwp_getpcb(l);
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#ifndef VM86_USE_VIF
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pcb->vm86_eflags &= ~PSL_I;
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#else
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pcb->vm86_eflags &= ~PSL_VIF;
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#endif
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}
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static __inline void
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set_vif(struct lwp *l)
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{
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struct pcb *pcb = lwp_getpcb(l);
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#ifndef VM86_USE_VIF
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pcb->vm86_eflags |= PSL_I;
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if ((pcb->vm86_eflags & (PSL_I|PSL_VIP)) == (PSL_I|PSL_VIP))
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#else
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pcb->vm86_eflags |= PSL_VIF;
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if ((pcb->vm86_eflags & (PSL_VIF|PSL_VIP)) == (PSL_VIF|PSL_VIP))
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#endif
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vm86_return(l, VM86_STI);
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}
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static __inline void
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set_vflags(struct lwp *l, int flags)
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{
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struct trapframe *tf = l->l_md.md_regs;
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struct pcb *pcb = lwp_getpcb(l);
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flags &= ~pcb->vm86_flagmask;
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SETFLAGS(pcb->vm86_eflags, flags, VM86_VIRTFLAGS);
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SETFLAGS(tf->tf_eflags, flags, VM86_REALFLAGS);
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#ifndef VM86_USE_VIF
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if ((pcb->vm86_eflags & (PSL_I|PSL_VIP)) == (PSL_I|PSL_VIP))
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#else
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if ((pcb->vm86_eflags & (PSL_VIF|PSL_VIP)) == (PSL_VIF|PSL_VIP))
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#endif
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vm86_return(l, VM86_STI);
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}
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static __inline int
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get_vflags(struct lwp *l)
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{
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struct trapframe *tf = l->l_md.md_regs;
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struct pcb *pcb = lwp_getpcb(l);
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int flags = PSL_MBO;
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SETFLAGS(flags, pcb->vm86_eflags, VM86_VIRTFLAGS);
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SETFLAGS(flags, tf->tf_eflags, VM86_REALFLAGS);
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return (flags);
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}
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static __inline void
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set_vflags_short(struct lwp *l, int flags)
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{
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struct trapframe *tf = l->l_md.md_regs;
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struct pcb *pcb = lwp_getpcb(l);
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flags &= ~pcb->vm86_flagmask;
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SETFLAGS(pcb->vm86_eflags, flags, VM86_VIRTFLAGS & 0xffff);
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SETFLAGS(tf->tf_eflags, flags, VM86_REALFLAGS & 0xffff);
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#ifndef VM86_USE_VIF
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if ((pcb->vm86_eflags & (PSL_I|PSL_VIP)) == (PSL_I|PSL_VIP))
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vm86_return(l, VM86_STI);
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#endif
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}
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static __inline int
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get_vflags_short(struct lwp *l)
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{
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struct trapframe *tf = l->l_md.md_regs;
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struct pcb *pcb = lwp_getpcb(l);
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int flags = PSL_MBO;
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SETFLAGS(flags, pcb->vm86_eflags, VM86_VIRTFLAGS & 0xffff);
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SETFLAGS(flags, tf->tf_eflags, VM86_REALFLAGS & 0xffff);
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return (flags);
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}
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#else
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int i386_vm86(struct vm86_struct *vmcp);
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#endif
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