386BSD 0.1 development

Work on file usr/src/sys.386bsd/i386/include/pcb.h

Co-Authored-By: Lynne Greer Jolitz <ljolitz@cardio.ucsf.edu>
Synthesized-from: 386BSD-0.1

diff --git a/usr/src/sys.386bsd/i386/include/pcb.h b/usr/src/sys.386bsd/i386/include/pcb.h
new file mode 100644 (file)
index 0000000..29fa36d
--- /dev/null
+++ b/usr/src/sys.386bsd/i386/include/pcb.h
@@ -0,0 +1,77 @@
+/*-
+ * 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.
+ *
+ *     @(#)pcb.h       5.10 (Berkeley) 5/12/91
+ */
+
+/*
+ * Intel 386 process control block
+ */
+#include "machine/tss.h"
+#include "machine/npx.h"
+
+struct pcb {
+       struct  i386tss pcb_tss;
+#define        pcb_ksp pcb_tss.tss_esp0
+#define        pcb_ptd pcb_tss.tss_cr3
+#define        pcb_cr3 pcb_ptd
+#define        pcb_pc  pcb_tss.tss_eip
+#define        pcb_psl pcb_tss.tss_eflags
+#define        pcb_usp pcb_tss.tss_esp
+#define        pcb_fp  pcb_tss.tss_ebp
+#ifdef notyet
+       u_char  pcb_iomap[NPORT/sizeof(u_char)]; /* i/o port bitmap */
+#endif
+       struct  save87  pcb_savefpu;    /* floating point state for 287/387 */
+       struct  emcsts  pcb_saveemc;    /* Cyrix EMC state */
+/*
+ * Software pcb (extension)
+ */
+       int     pcb_flags;
+#define        FP_WASUSED      0x01    /* process has used fltng pnt hardware */
+#define        FP_NEEDSSAVE    0x02    /* ... that needs save on next context switch */
+#define        FP_NEEDSRESTORE 0x04    /* ... that needs restore on next DNA fault */
+#define        FP_USESEMC      0x08    /* process uses EMC memory-mapped mode */
+#define        FM_TRAP         0x10    /* process entered kernel on a trap frame */
+#define        FP_SOFTFP       0x20    /* process using software fltng pnt emulator */
+       short   pcb_iml;        /* interrupt mask level */
+       caddr_t pcb_onfault;    /* copyin/out fault recovery */
+       long    pcb_sigc[8];    /* XXX signal code trampoline */
+       int     pcb_cmap2;      /* XXX temporary PTE - will prefault instead */
+};
+
+#ifdef KERNEL
+struct pcb *curpcb;            /* our current running pcb */
+#endif