| | 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 | * $FreeBSD: src/sys/i386/include/globaldata.h,v 1.11.2.1 2000/05/16 06:58:10 dillon Exp $ |
| | 27 | * $DragonFly: src/sys/platform/pc32/include/globaldata.h,v 1.7 2003/06/19 06:26:08 dillon Exp $ |
| | 28 | */ |
| | 29 | |
| | 30 | /* |
| | 31 | * This structure maps out the global data that needs to be kept on a |
| | 32 | * per-cpu basis. genassym uses this to generate offsets for the assembler |
| | 33 | * code, which also provides external symbols so that C can get at them as |
| | 34 | * though they were really globals. |
| | 35 | * |
| | 36 | * The SMP parts are setup in pmap.c and locore.s for the BSP, and |
| | 37 | * mp_machdep.c sets up the data for the AP's to "see" when they awake. |
| | 38 | * The reason for doing it via a struct is so that an array of pointers |
| | 39 | * to each CPU's data can be set up for things like "check curproc on all |
| | 40 | * other processors" |
| | 41 | */ |
| | 42 | struct globaldata { |
| | 43 | struct privatespace *gd_prvspace; /* self-reference */ |
| | 44 | struct thread *gd_curthread; |
| | 45 | struct thread *gd_npxthread; |
| | 46 | struct timeval gd_switchtime; |
| | 47 | struct i386tss gd_common_tss; |
| | 48 | int gd_switchticks; |
| | 49 | int gd_freethreadcnt; /* YYY */ |
| | 50 | TAILQ_HEAD(,thread) gd_freethreads; /* YYY */ |
| | 51 | struct segment_descriptor gd_common_tssd; |
| | 52 | struct segment_descriptor *gd_tss_gdt; |
| | 53 | #ifdef USER_LDT |
| | 54 | int gd_currentldt; |
| | 55 | #endif |
| | 56 | #ifdef SMP |
| | 57 | u_int gd_cpuid; |
| | 58 | u_int gd_cpu_lockid; |
| | 59 | u_int gd_other_cpus; |
| | 60 | int gd_inside_intr; |
| | 61 | u_int gd_ss_eflags; |
| | 62 | pt_entry_t *gd_prv_CMAP1; |
| | 63 | pt_entry_t *gd_prv_CMAP2; |
| | 64 | pt_entry_t *gd_prv_CMAP3; |
| | 65 | pt_entry_t *gd_prv_PMAP1; |
| | 66 | caddr_t gd_prv_CADDR1; |
| | 67 | caddr_t gd_prv_CADDR2; |
| | 68 | caddr_t gd_prv_CADDR3; |
| | 69 | unsigned *gd_prv_PADDR1; |
| | 70 | #endif |
| | 71 | u_int gd_astpending; |
| | 72 | struct thread gd_idlethread; |
| | 73 | }; |
| | 74 | |
| | 75 | #ifdef SMP |
| | 76 | /* |
| | 77 | * This is the upper (0xff800000) address space layout that is per-cpu. |
| | 78 | * It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for |
| | 79 | * each AP. genassym helps export this to the assembler code. |
| | 80 | */ |
| | 81 | struct privatespace { |
| | 82 | /* page 0 - data page */ |
| | 83 | struct globaldata globaldata; |
| | 84 | char __filler0[PAGE_SIZE - sizeof(struct globaldata)]; |
| | 85 | |
| | 86 | /* page 1..4 - CPAGE1,CPAGE2,CPAGE3,PPAGE1 */ |
| | 87 | char CPAGE1[PAGE_SIZE]; |
| | 88 | char CPAGE2[PAGE_SIZE]; |
| | 89 | char CPAGE3[PAGE_SIZE]; |
| | 90 | char PPAGE1[PAGE_SIZE]; |
| | 91 | |
| | 92 | /* page 5..4+UPAGES - idle stack (UPAGES pages) */ |
| | 93 | char idlestack[UPAGES * PAGE_SIZE]; |
| | 94 | }; |
| | 95 | |
| | 96 | extern struct privatespace SMP_prvspace[]; |
| | 97 | |
| | 98 | #else |
| | 99 | |
| | 100 | extern struct globaldata UP_globaldata; |
| | 101 | |
| | 102 | #endif |
| | 103 | |
projects / dragonfly.git / blame_incremental