/*- * Copyright (c) Peter Wemm * All rights reserved. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. * * $FreeBSD: src/sys/i386/include/globaldata.h,v 1.11.2.1 2000/05/16 06:58:10 dillon Exp $ * $DragonFly: src/sys/platform/pc32/include/globaldata.h,v 1.10 2003/06/23 23:36:08 dillon Exp $ */ /* * This structure maps out the global data that needs to be kept on a * per-cpu basis. genassym uses this to generate offsets for the assembler * code, which also provides external symbols so that C can get at them as * though they were really globals. * * The SMP parts are setup in pmap.c and locore.s for the BSP, and * mp_machdep.c sets up the data for the AP's to "see" when they awake. * The reason for doing it via a struct is so that an array of pointers * to each CPU's data can be set up for things like "check curproc on all * other processors" * * NOTE! this structure needs to remain compatible between module accessors * and the kernel, so we can't throw in lots of #ifdef's. */ struct globaldata { struct privatespace *gd_prvspace; /* self-reference */ struct thread *gd_curthread; struct thread *gd_npxthread; struct i386tss gd_common_tss; int gd_tdfreecount; /* new thread cache */ int gd_reqpri; /* highest pri blocked thread */ TAILQ_HEAD(,thread) gd_tdfreeq; /* new thread cache */ TAILQ_HEAD(,thread) gd_tdrunq; /* runnable threads */ struct segment_descriptor gd_common_tssd; struct segment_descriptor *gd_tss_gdt; int gd_currentldt; /* USER_LDT */ u_int gd_cpu; struct timeval gd_stattv; #ifdef SMP u_int gd_cpu_lockid; u_int gd_other_cpus; int gd_inside_intr; u_int gd_ss_eflags; pt_entry_t *gd_prv_CMAP1; pt_entry_t *gd_prv_CMAP2; pt_entry_t *gd_prv_CMAP3; pt_entry_t *gd_prv_PMAP1; caddr_t gd_prv_CADDR1; caddr_t gd_prv_CADDR2; caddr_t gd_prv_CADDR3; unsigned *gd_prv_PADDR1; #endif u_int gd_astpending; struct thread gd_idlethread; }; /* * This is the upper (0xff800000) address space layout that is per-cpu. * It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for * each AP. genassym helps export this to the assembler code. */ struct privatespace { /* page 0 - data page */ struct globaldata globaldata; char __filler0[PAGE_SIZE - sizeof(struct globaldata)]; #ifdef SMP /* page 1..4 - CPAGE1,CPAGE2,CPAGE3,PPAGE1 */ char CPAGE1[PAGE_SIZE]; char CPAGE2[PAGE_SIZE]; char CPAGE3[PAGE_SIZE]; char PPAGE1[PAGE_SIZE]; #endif /* page 5..4+UPAGES - idle stack (UPAGES pages) */ char idlestack[UPAGES * PAGE_SIZE]; }; extern struct privatespace CPU_prvspace[];