52ca7b4d7c
remove global variable in_vm86call, set vm86 calling flag in PCB flags. 2.Fix vm86 BIOS calling preempted problem by changing vm86_lock mutex type from MTX_DEF to MTX_SPIN. vm86pcb is not remembered in thread struct, when the thread calling vm86 BIOS is preempted by interrupt thread, and later switching back to the thread would cause incorrect context be loaded into CPU registers, this leads to kernel crash.
165 lines
4.5 KiB
C
165 lines
4.5 KiB
C
/*-
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* Copyright (c) 1997 Jonathan Lemon
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* All rights reserved.
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*
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* Derived from register.h, which is
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* Copyright (c) 1996 Michael Smith. All rights reserved.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_VM86_H_
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#define _MACHINE_VM86_H_ 1
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/* standard register representation */
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typedef union {
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u_int r_ex;
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struct {
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u_short r_x;
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u_int :16;
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} r_w;
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struct {
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u_char r_l;
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u_char r_h;
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u_int :16;
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} r_b;
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} reg86_t;
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/* layout must match definition of struct trapframe_vm86 in <machine/frame.h> */
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struct vm86frame {
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int kernel_fs;
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int kernel_es;
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int kernel_ds;
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reg86_t edi;
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reg86_t esi;
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reg86_t ebp;
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reg86_t isp;
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reg86_t ebx;
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reg86_t edx;
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reg86_t ecx;
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reg86_t eax;
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int vmf_trapno;
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int vmf_err;
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reg86_t eip;
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reg86_t cs;
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reg86_t eflags;
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reg86_t esp;
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reg86_t ss;
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reg86_t es;
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reg86_t ds;
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reg86_t fs;
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reg86_t gs;
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#define vmf_ah eax.r_b.r_h
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#define vmf_al eax.r_b.r_l
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#define vmf_ax eax.r_w.r_x
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#define vmf_eax eax.r_ex
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#define vmf_bh ebx.r_b.r_h
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#define vmf_bl ebx.r_b.r_l
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#define vmf_bx ebx.r_w.r_x
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#define vmf_ebx ebx.r_ex
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#define vmf_ch ecx.r_b.r_h
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#define vmf_cl ecx.r_b.r_l
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#define vmf_cx ecx.r_w.r_x
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#define vmf_ecx ecx.r_ex
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#define vmf_dh edx.r_b.r_h
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#define vmf_dl edx.r_b.r_l
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#define vmf_dx edx.r_w.r_x
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#define vmf_edx edx.r_ex
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#define vmf_si esi.r_w.r_x
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#define vmf_di edi.r_w.r_x
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#define vmf_cs cs.r_w.r_x
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#define vmf_ds ds.r_w.r_x
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#define vmf_es es.r_w.r_x
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#define vmf_ss ss.r_w.r_x
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#define vmf_sp esp.r_w.r_x
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#define vmf_ip eip.r_w.r_x
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#define vmf_flags eflags.r_w.r_x
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#define vmf_eflags eflags.r_ex
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};
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#define VM86_PMAPSIZE 3
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#define VMAP_MALLOC 1 /* page was malloced by us */
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struct vm86context {
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int npages;
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struct vm86pmap {
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int flags;
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int pte_num;
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vm_offset_t kva;
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u_int old_pte;
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} pmap[VM86_PMAPSIZE];
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};
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#define VM_USERCHANGE (PSL_USERCHANGE | PSL_RF)
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#define VME_USERCHANGE (VM_USERCHANGE | PSL_VIP | PSL_VIF)
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struct vm86_kernel {
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caddr_t vm86_intmap; /* interrupt map */
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u_int vm86_eflags; /* emulated flags */
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int vm86_has_vme; /* VME support */
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int vm86_inited; /* we were initialized */
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int vm86_debug;
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caddr_t vm86_sproc; /* address of sproc */
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};
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#define VM86_INIT 1
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#define VM86_SET_VME 2
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#define VM86_GET_VME 3
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#define VM86_INTCALL 4
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struct vm86_init_args {
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int debug; /* debug flag */
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int cpu_type; /* cpu type to emulate */
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u_char int_map[32]; /* interrupt map */
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};
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struct vm86_vme_args {
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int state; /* status */
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};
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struct vm86_intcall_args {
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int intnum;
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struct vm86frame vmf;
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};
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#ifdef _KERNEL
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extern int vm86paddr;
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struct thread;
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extern int vm86_emulate(struct vm86frame *);
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extern int vm86_sysarch(struct thread *, char *);
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extern void vm86_trap(struct vm86frame *);
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extern int vm86_intcall(int, struct vm86frame *);
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extern int vm86_datacall(int, struct vm86frame *, struct vm86context *);
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extern void vm86_initialize(void);
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extern vm_offset_t vm86_getpage(struct vm86context *, int);
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extern vm_offset_t vm86_addpage(struct vm86context *, int, vm_offset_t);
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extern int vm86_getptr(struct vm86context *, vm_offset_t, u_short *, u_short *);
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extern vm_offset_t vm86_getaddr(struct vm86context *, u_short, u_short);
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#endif /* _KERNEL */
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#endif /* _MACHINE_VM86_H_ */
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