1 /* 2 * Copyright (c) 2006 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $DragonFly: src/sys/platform/vkernel/platform/globaldata.c,v 1.5 2008/04/28 07:05:08 dillon Exp $ 35 */ 36 37 #include <sys/types.h> 38 #include <sys/systm.h> 39 #include <sys/stat.h> 40 #include <sys/mman.h> 41 #include <sys/tls.h> 42 #include <sys/proc.h> 43 #include <vm/vm_page.h> 44 45 #include <machine/md_var.h> 46 #include <machine/globaldata.h> 47 #include <machine/vmparam.h> 48 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <unistd.h> 52 #include <fcntl.h> 53 #include <string.h> 54 #include <err.h> 55 #include <errno.h> 56 #include <assert.h> 57 58 struct globaldata * 59 globaldata_find(int cpu) 60 { 61 KKASSERT(cpu >= 0 && cpu < ncpus); 62 return (&CPU_prvspace[cpu].mdglobaldata.mi); 63 } 64 65 void 66 cpu_gdinit(struct mdglobaldata *gd, int cpu) 67 { 68 if (cpu) 69 gd->mi.gd_curthread = &gd->mi.gd_idlethread; 70 71 lwkt_init_thread(&gd->mi.gd_idlethread, 72 gd->mi.gd_prvspace->idlestack, 73 sizeof(gd->mi.gd_prvspace->idlestack), 74 0, &gd->mi); 75 lwkt_set_comm(&gd->mi.gd_idlethread, "idle_%d", cpu); 76 gd->mi.gd_idlethread.td_switch = cpu_lwkt_switch; 77 gd->mi.gd_idlethread.td_sp -= sizeof(void *); 78 *(void **)gd->mi.gd_idlethread.td_sp = cpu_idle_restore; 79 } 80 81 int 82 is_globaldata_space(vm_offset_t saddr, vm_offset_t eaddr) 83 { 84 if (saddr >= (vm_offset_t)&CPU_prvspace[0] && 85 eaddr <= (vm_offset_t)&CPU_prvspace[MAXCPU]) { 86 return (TRUE); 87 } 88 return (FALSE); 89 } 90