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- /*-
- * Copyright (c) 1990 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * William Jolitz.
- *
- * 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.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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.
- *
- * @(#)tss.h 5.4 (Berkeley) 1/18/91
- */
-
- /*
- * Intel 386 Context Data Type
- */
-
- struct i386tss {
- int tss_link; /* actually 16 bits: top 16 bits must be zero */
- int tss_esp0; /* kernel stack pointer priviledge level 0 */
- #define tss_ksp tss_esp0
- int tss_ss0; /* actually 16 bits: top 16 bits must be zero */
- int tss_esp1; /* kernel stack pointer priviledge level 1 */
- int tss_ss1; /* actually 16 bits: top 16 bits must be zero */
- int tss_esp2; /* kernel stack pointer priviledge level 2 */
- int tss_ss2; /* actually 16 bits: top 16 bits must be zero */
- /* struct ptd *tss_cr3; /* page table directory */
- int tss_cr3; /* page table directory */
- #define tss_ptd tss_cr3
- int tss_eip; /* program counter */
- #define tss_pc tss_eip
- int tss_eflags; /* program status longword */
- #define tss_psl tss_eflags
- int tss_eax;
- int tss_ecx;
- int tss_edx;
- int tss_ebx;
- int tss_esp; /* user stack pointer */
- #define tss_usp tss_esp
- int tss_ebp; /* user frame pointer */
- #define tss_fp tss_ebp
- int tss_esi;
- int tss_edi;
- int tss_es; /* actually 16 bits: top 16 bits must be zero */
- int tss_cs; /* actually 16 bits: top 16 bits must be zero */
- int tss_ss; /* actually 16 bits: top 16 bits must be zero */
- int tss_ds; /* actually 16 bits: top 16 bits must be zero */
- int tss_fs; /* actually 16 bits: top 16 bits must be zero */
- int tss_gs; /* actually 16 bits: top 16 bits must be zero */
- int tss_ldt; /* actually 16 bits: top 16 bits must be zero */
- int tss_ioopt; /* options & io offset bitmap: currently zero */
- /* XXX unimplemented .. i/o permission bitmap */
- };
-