kernel - Introduce lightweight buffers
[dragonfly.git] / sys / platform / vkernel / i386 / global.s
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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/i386/globals.s,v 1.13.2.1 2000/05/16 06:58:06 dillon Exp $
6f7b98e0 27 * $DragonFly: src/sys/platform/vkernel/i386/global.s,v 1.2 2007/01/05 22:18:18 dillon Exp $
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28 */
29
30#include <machine/asmacros.h>
31#include <machine/pmap.h>
32
33#include "assym.s"
34
35 /*
36 * Define the layout of the per-cpu address space. This is
37 * "constructed" in locore.s on the BSP and in mp_machdep.c for
38 * each AP. DO NOT REORDER THESE WITHOUT UPDATING THE REST!
39 *
40 * On UP the per-cpu address space is simply placed in the data
41 * segment.
42 */
43 .data
44
45 .globl globaldata
46 .set globaldata,0
47
48 /*
49 * Define layout of the global data. On SMP this lives in
50 * the per-cpu address space, otherwise it's in the data segment.
51 */
52 .globl gd_curthread, gd_npxthread, gd_reqflags, gd_common_tss
53 .set gd_curthread,globaldata + GD_CURTHREAD
54 .set gd_npxthread,globaldata + GD_NPXTHREAD
55 .set gd_reqflags,globaldata + GD_REQFLAGS
56 .set gd_common_tss,globaldata + GD_COMMON_TSS
57
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58 .globl gd_lwbuf_fpages
59 .set gd_lwbuf_fpages,globaldata + GD_LWBUF_FPAGES
60
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61 .globl gd_common_tssd, gd_tss_gdt
62 .set gd_common_tssd,globaldata + GD_COMMON_TSSD
63 .set gd_tss_gdt,globaldata + GD_TSS_GDT
64
65 .globl gd_currentldt
66 .set gd_currentldt,globaldata + GD_CURRENTLDT
67
68 .globl gd_fpu_lock, gd_savefpu
69 .set gd_fpu_lock, globaldata + GD_FPU_LOCK
70 .set gd_savefpu, globaldata + GD_SAVEFPU
71
72 /*
73 * The BSP version of these get setup in locore.s and pmap.c, while
74 * the AP versions are setup in mp_machdep.c.
75 */
c2fb025d 76 .globl gd_cpuid, gd_cpumask, gd_other_cpus
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77 .globl gd_ss_eflags, gd_intr_nesting_level
78 .globl gd_CMAP1, gd_CMAP2, gd_CMAP3, gd_PMAP1
79 .globl gd_CADDR1, gd_CADDR2, gd_CADDR3, gd_PADDR1
80 .globl gd_spending, gd_ipending, gd_fpending
6f7b98e0 81 .globl gd_cnt
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82
83 .set gd_cpuid,globaldata + GD_CPUID
c2fb025d 84 .set gd_cpumask,globaldata + GD_CPUMASK
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85 .set gd_other_cpus,globaldata + GD_OTHER_CPUS
86 .set gd_ss_eflags,globaldata + GD_SS_EFLAGS
87 .set gd_intr_nesting_level,globaldata + GD_INTR_NESTING_LEVEL
88 .set gd_CMAP1,globaldata + GD_PRV_CMAP1
89 .set gd_CMAP2,globaldata + GD_PRV_CMAP2
90 .set gd_CMAP3,globaldata + GD_PRV_CMAP3
91 .set gd_PMAP1,globaldata + GD_PRV_PMAP1
92 .set gd_CADDR1,globaldata + GD_PRV_CADDR1
93 .set gd_CADDR2,globaldata + GD_PRV_CADDR2
94 .set gd_CADDR3,globaldata + GD_PRV_CADDR3
95 .set gd_PADDR1,globaldata + GD_PRV_PADDR1
96 .set gd_fpending,globaldata + GD_FPENDING
97 .set gd_ipending,globaldata + GD_IPENDING
98 .set gd_spending,globaldata + GD_SPENDING
99 .set gd_cnt,globaldata + GD_CNT
100