sys/platform/pc32/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/pc32/include/globaldata.h,v 1.29 2006/10/23 21:50:31 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 _MACHINE_SEGMENTS_H_
  46 #include <machine/segments.h>   /* struct segment_descriptor */
  47 #endif
  48 #ifndef _MACHINE_TSS_H_
  49 #include <machine/tss.h>        /* struct i386tss */
  50 #endif
  51 #ifndef _MACHINE_NPX_H_
  52 #include <machine/npx.h>
  53 #endif
  54
  55 /*
  56  * Note on interrupt control.  Pending interrupts not yet dispatched are
  57  * marked in gd_fpending, gd_ipending, or gd_spending.  Once dispatched
  58  * the interrupt's pending bit is cleared and the interrupt is masked.
  59  * Upon completion the interrupt is unmasked.
  60  *
  61  * For edge triggered interrupts interrupts may be enabled again at this
  62  * point and if they occur before the interrupt service routine is complete
  63  * the service routine will loop.
  64  *
  65  * The current thread's cpl is stored in the thread structure.
  66  *
  67  * Note: the embedded globaldata and/or the mdglobaldata structure
  68  * may exceed the size of a page.
  69  */
  70 struct mdglobaldata {
  71         struct globaldata mi;
  72         struct segment_descriptor gd_common_tssd;
  73         struct segment_descriptor *gd_tss_gdt;
  74         struct thread   *gd_npxthread;
  75         struct i386tss  gd_common_tss;
  76         union savefpu   gd_savefpu;     /* fast bcopy/zero temp fpu save area */
  77         int             gd_fpu_lock;    /* fast bcopy/zero cpu lock */
  78         int             gd_fpending;    /* fast interrupt pending */
  79         int             gd_ipending;    /* normal interrupt pending */
  80         int             gd_spending;    /* software interrupt pending */
  81         int             gd_sdelayed;    /* delayed software ints */
  82         int             gd_currentldt;
  83         int             gd_private_tss;
  84         u_int           unused001;
  85         u_int           gd_other_cpus;
  86         u_int           gd_ss_eflags;
  87         pt_entry_t      *gd_CMAP1;
  88         pt_entry_t      *gd_CMAP2;
  89         pt_entry_t      *gd_CMAP3;
  90         pt_entry_t      *gd_PMAP1;
  91         caddr_t         gd_CADDR1;
  92         caddr_t         gd_CADDR2;
  93         caddr_t         gd_CADDR3;
  94         unsigned        *gd_PADDR1;
  95         u_int           gd_acpi_id;
  96         u_int           gd_apic_id;
  97 };
  98
  99 #define MDGLOBALDATA_BASEALLOC_SIZE     \
 100         ((sizeof(struct mdglobaldata) + PAGE_MASK) & ~PAGE_MASK)
 101 #define MDGLOBALDATA_BASEALLOC_PAGES    \
 102         (MDGLOBALDATA_BASEALLOC_SIZE / PAGE_SIZE)
 103 #define MDGLOBALDATA_PAD                \
 104         (MDGLOBALDATA_BASEALLOC_SIZE - sizeof(struct mdglobaldata))
 105
 106 /*
 107  * This is the upper (0xff800000) address space layout that is per-cpu.
 108  * It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for
 109  * each AP.  genassym helps export this to the assembler code.
 110  *
 111  * WARNING!  page-bounded fields and page table indexes are hardwired
 112  * for SMPpt[] setup in i386/i386/mp_machdep.c and locore.s.
 113  *
 114  * WARNING!  sizeof(privatespace[SMP_MAXCPU]) must fit in the KVA
 115  * reserved for the SMPpt page table (typically one page table page).
 116  *
 117  * WARNING!  This structure must be a multiple of PAGE_SIZE.
 118  */
 119 struct privatespace {
 120         /* main data page */
 121         struct mdglobaldata mdglobaldata;
 122         char            __filler0[MDGLOBALDATA_PAD];
 123
 124         /* mapping pages - CPAGE1,CPAGE2,CPAGE3,PPAGE1 */
 125         char            CPAGE1[PAGE_SIZE];              /* SMPpt[n+0] */
 126         char            CPAGE2[PAGE_SIZE];              /* SMPpt[n+1] */
 127         char            CPAGE3[PAGE_SIZE];              /* SMPpt[n+2] */
 128         char            PPAGE1[PAGE_SIZE];              /* SMPpt[n+3] */
 129
 130         /* idle stack (UPAGES pages) */
 131         char            idlestack[UPAGES * PAGE_SIZE];  /* SMPpt[n+4] */
 132 };
 133 #define mdcpu           ((struct mdglobaldata *)_get_mycpu())
 134
 135 #endif
 136
 137 #ifdef _KERNEL
 138
 139 extern struct privatespace CPU_prvspace[];
 140
 141 #endif
 142
 143 #endif