sys/platform/vkernel/include/globaldata.h

   1 /*-
   2  * Copyright (c) Peter Wemm <peter@netplex.com.au>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  *      Only machine-dependant code should ever include this file.  MI
  27  *      code and header files do NOT include this file.  e.g. sys/globaldata.h
  28  *      should not include this file.
  29  *
  30  * $FreeBSD: src/sys/i386/include/globaldata.h,v 1.11.2.1 2000/05/16 06:58:10 dillon Exp $
  31  * $DragonFly: src/sys/platform/vkernel/include/globaldata.h,v 1.7 2007/07/01 02:51:44 dillon Exp $
  32  */
  33
  34 #ifndef _MACHINE_GLOBALDATA_H_
  35 #define _MACHINE_GLOBALDATA_H_
  36
  37 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
  38
  39 #ifndef _SYS_GLOBALDATA_H_
  40 #include <sys/globaldata.h>     /* struct globaldata */
  41 #endif
  42 #ifndef _SYS_THREAD_H_
  43 #include <sys/thread.h>         /* struct thread */
  44 #endif
  45 #ifndef _SYS_VKERNEL_H_
  46 #include <sys/vkernel.h>        /* vpte_t */
  47 #endif
  48 #ifndef _MACHINE_SEGMENTS_H_
  49 #include <machine/segments.h>   /* struct segment_descriptor */
  50 #endif
  51 #ifndef _MACHINE_TSS_H_
  52 #include <machine/tss.h>        /* struct i386tss */
  53 #endif
  54 #ifndef _MACHINE_NPX_H_
  55 #include <machine/npx.h>
  56 #endif
  57
  58 /*
  59  * Note on interrupt control.  Pending interrupts not yet dispatched are
  60  * marked in gd_fpending, gd_ipending, or gd_spending.  Once dispatched
  61  * the interrupt's pending bit is cleared and the interrupt is masked.
  62  * Upon completion the interrupt is unmasked.
  63  *
  64  * For edge triggered interrupts interrupts may be enabled again at this
  65  * point and if they occur before the interrupt service routine is complete
  66  * the service routine will loop.
  67  *
  68  * The current thread's cpl is stored in the thread structure.
  69  *
  70  * Note: the embedded globaldata and/or the mdglobaldata structure
  71  * may exceed the size of a page.
  72  */
  73 struct mdglobaldata {
  74         struct globaldata mi;
  75         struct segment_descriptor gd_common_tssd;
  76         struct segment_descriptor *gd_tss_gdt;
  77         struct thread   *gd_npxthread;
  78         struct i386tss  gd_common_tss;
  79         union savefpu   gd_savefpu;     /* fast bcopy/zero temp fpu save area */
  80         int             gd_fpu_lock;    /* fast bcopy/zero cpu lock */
  81         int             gd_fpending;    /* fast interrupt pending */
  82         int             gd_ipending;    /* normal interrupt pending */
  83         int             gd_spending;    /* software interrupt pending */
  84         int             gd_sdelayed;    /* delayed software ints */
  85         int             gd_currentldt;
  86         int             unused003;
  87         int             unused002;
  88         u_int           unused001;
  89         u_int           gd_other_cpus;
  90         u_int           gd_ss_eflags;
  91         vpte_t          *gd_CMAP1;      /* pointer to pte for CADDR1 */
  92         vpte_t          *gd_CMAP2;
  93         vpte_t          *gd_CMAP3;
  94         vpte_t          *gd_PMAP1;
  95
  96         caddr_t         gd_CADDR1;
  97         caddr_t         gd_CADDR2;
  98         caddr_t         gd_CADDR3;
  99         vpte_t          *gd_PADDR1;
 100
 101         /*
 102          * Page table mappings, see get_ptbase()
 103          */
 104         vpte_t          *gd_PT1map;     /* points into privatedata */
 105         vpte_t          *gd_PT1pdir;    /* KVA of page directory */
 106         vpte_t          *gd_PT1pde;     /* pointer to pde */
 107         vpte_t          *gd_PT2map;
 108         vpte_t          *gd_PT2pdir;
 109         vpte_t          *gd_PT2pde;
 110         int             gd_PTflip;
 111
 112 };
 113
 114 #define MDGLOBALDATA_BASEALLOC_SIZE     \
 115         ((sizeof(struct mdglobaldata) + PAGE_MASK) & ~PAGE_MASK)
 116 #define MDGLOBALDATA_BASEALLOC_PAGES    \
 117         (MDGLOBALDATA_BASEALLOC_SIZE / PAGE_SIZE)
 118 #define MDGLOBALDATA_PAD                \
 119         (MDGLOBALDATA_BASEALLOC_SIZE - sizeof(struct mdglobaldata))
 120
 121 /*
 122  * This is the upper (0xff800000) address space layout that is per-cpu.
 123  * It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for
 124  * each AP.  genassym helps export this to the assembler code.
 125  *
 126  * WARNING!  This structure must be segment-aligned and portions within the
 127  *           structure must also be segment-aligned.  The structure typically
 128  *           takes 3 segments per cpu (12MB).
 129  */
 130 #define PRIVATESPACE_SEGPAD     \
 131         (SEG_SIZE -             \
 132         ((sizeof(struct mdglobaldata) + MDGLOBALDATA_PAD + PAGE_SIZE * 4 +  \
 133         UPAGES * PAGE_SIZE) % SEG_SIZE))                                    \
 134
 135 struct privatespace {
 136         /* main data page */
 137         struct mdglobaldata mdglobaldata;
 138         char            __filler0[MDGLOBALDATA_PAD];
 139
 140         /* mapping pages - CPAGE1,CPAGE2,CPAGE3,PPAGE1 */
 141         char            CPAGE1[PAGE_SIZE];
 142         char            CPAGE2[PAGE_SIZE];
 143         char            CPAGE3[PAGE_SIZE];
 144         vpte_t          PPAGE1[PAGE_SIZE / sizeof(vpte_t)];
 145
 146         /* idle stack (UPAGES pages) */
 147         char            idlestack[UPAGES * PAGE_SIZE];
 148
 149         /* we must PAD to SEG_SIZE */
 150         char            __filler1[PRIVATESPACE_SEGPAD];
 151         vpte_t          PT1MAP[SEG_SIZE / sizeof(vpte_t)];
 152         vpte_t          PT2MAP[SEG_SIZE / sizeof(vpte_t)];
 153 };
 154 #define mdcpu           ((struct mdglobaldata *)_get_mycpu())
 155
 156 #endif
 157
 158 #ifdef _KERNEL
 159
 160 extern struct privatespace *CPU_prvspace;
 161
 162 #endif
 163
 164 #endif