2 * Copyright (c) 2006 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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
34 * $DragonFly: src/sys/platform/vkernel/platform/globaldata.c,v 1.5 2008/04/28 07:05:08 dillon Exp $
37 #include <sys/types.h>
38 #include <sys/systm.h>
43 #include <vm/vm_page.h>
45 #include <machine/md_var.h>
46 #include <machine/globaldata.h>
47 #include <machine/vmparam.h>
59 globaldata_find(int cpu)
61 KKASSERT(cpu >= 0 && cpu < ncpus);
62 return (&CPU_prvspace[cpu].mdglobaldata.mi);
66 cpu_gdinit(struct mdglobaldata *gd, int cpu)
69 gd->mi.gd_curthread = &gd->mi.gd_idlethread;
71 lwkt_init_thread(&gd->mi.gd_idlethread,
72 gd->mi.gd_prvspace->idlestack,
73 sizeof(gd->mi.gd_prvspace->idlestack),
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;
81 * Single page mappings and where we have to store the related
84 gd->gd_CADDR1 = (caddr_t)gd->mi.gd_prvspace->CPAGE1;
85 gd->gd_CADDR2 = (caddr_t)gd->mi.gd_prvspace->CPAGE2;
86 gd->gd_CADDR3 = (caddr_t)gd->mi.gd_prvspace->CPAGE3;
87 gd->gd_PADDR1 = gd->mi.gd_prvspace->PPAGE1;
89 gd->gd_CMAP1 = &KernelPTA[(vm_offset_t)gd->gd_CADDR1 / PAGE_SIZE];
90 gd->gd_CMAP2 = &KernelPTA[(vm_offset_t)gd->gd_CADDR2 / PAGE_SIZE];
91 gd->gd_CMAP3 = &KernelPTA[(vm_offset_t)gd->gd_CADDR3 / PAGE_SIZE];
92 gd->gd_PMAP1 = &KernelPTA[(vm_offset_t)gd->gd_PADDR1 / PAGE_SIZE];
95 * Whole page table mappings and where we have to store the related
99 gd->gd_PT1map = gd->mi.gd_prvspace->PT1MAP;
100 gd->gd_PT1pdir = NULL;
101 gd->gd_PT1pde = &KernelPTD[((vm_offset_t)gd->gd_PT1map - KvaStart) /
104 gd->gd_PT2map = gd->mi.gd_prvspace->PT2MAP;
105 gd->gd_PT2pdir = NULL;
106 gd->gd_PT2pde = &KernelPTD[((vm_offset_t)gd->gd_PT2map - KvaStart) /
109 gd->gd_PT3map = gd->mi.gd_prvspace->PT3MAP;
110 gd->gd_PT3pdir = NULL;
111 gd->gd_PT3pde = &KernelPTD[((vm_offset_t)gd->gd_PT3map - KvaStart) /
114 KKASSERT(((vm_offset_t)gd->gd_PT1map & SEG_MASK) == 0);
115 KKASSERT(((vm_offset_t)gd->gd_PT2map & SEG_MASK) == 0);
116 KKASSERT(((vm_offset_t)gd->gd_PT3map & SEG_MASK) == 0);
120 is_globaldata_space(vm_offset_t saddr, vm_offset_t eaddr)
122 if (saddr >= (vm_offset_t)&CPU_prvspace[0] &&
123 eaddr <= (vm_offset_t)&CPU_prvspace[MAXCPU]) {