kernel - Introduce lightweight buffers
[dragonfly.git] / sys / platform / pc32 / include / globaldata.h
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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 *
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26 * Only machine-dependant code should ever include this file. MI
27 * code and header files do NOT include this file. e.g. sys/globaldata.h
28 * should not include this file.
29 *
984263bc 30 * $FreeBSD: src/sys/i386/include/globaldata.h,v 1.11.2.1 2000/05/16 06:58:10 dillon Exp $
f8334305 31 * $DragonFly: src/sys/platform/pc32/include/globaldata.h,v 1.29 2006/10/23 21:50:31 dillon Exp $
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32 */
33
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34#ifndef _MACHINE_GLOBALDATA_H_
35#define _MACHINE_GLOBALDATA_H_
36
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37#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
38
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39#ifndef _SYS_GLOBALDATA_H_
40#include <sys/globaldata.h> /* struct globaldata */
41#endif
42#ifndef _SYS_THREAD_H_
43#include <sys/thread.h> /* struct thread */
44#endif
45#ifndef _MACHINE_SEGMENTS_H_
f8334305 46#include <machine/segments.h> /* struct segment_descriptor */
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47#endif
48#ifndef _MACHINE_TSS_H_
f8334305 49#include <machine/tss.h> /* struct i386tss */
85100692 50#endif
a02705a9 51#ifndef _MACHINE_NPX_H_
f8334305 52#include <machine/npx.h>
a02705a9 53#endif
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54#ifndef _CPU_LWBUF_H_
55#include <cpu/lwbuf.h>
56#endif
85100692 57
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58/*
59 * Note on interrupt control. Pending interrupts not yet dispatched are
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60 * marked in gd_fpending or gd_spending. Once dispatched the interrupt's
61 * pending bit is cleared and the interrupt is masked. Upon completion
62 * the interrupt is unmasked.
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63 *
64 * For edge triggered interrupts interrupts may be enabled again at this
65 * point and if they occur before the interrupt service routine is complete
66 * the service routine will loop.
67 *
68 * The current thread's cpl is stored in the thread structure.
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69 *
70 * Note: the embedded globaldata and/or the mdglobaldata structure
71 * may exceed the size of a page.
ef0fdad1 72 */
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73struct mdglobaldata {
74 struct globaldata mi;
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75 struct segment_descriptor gd_common_tssd;
76 struct segment_descriptor *gd_tss_gdt;
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77 struct thread *gd_npxthread;
78 struct i386tss gd_common_tss;
5c5185ae 79 struct lwbuf_free_kvp_list gd_lwbuf_fpages; /* lwbuf: free kva */
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80 union savefpu gd_savefpu; /* fast bcopy/zero temp fpu save area */
81 int gd_fpu_lock; /* fast bcopy/zero cpu lock */
ef0fdad1 82 int gd_fpending; /* fast interrupt pending */
729e15a8 83 int unused002;
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84 int gd_spending; /* software interrupt pending */
85 int gd_sdelayed; /* delayed software ints */
ee66458c 86 int gd_currentldt;
a2a5ad0d 87 int gd_private_tss;
0f7a3396 88 u_int unused001;
984263bc 89 u_int gd_other_cpus;
984263bc 90 u_int gd_ss_eflags;
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91 pt_entry_t *gd_CMAP1;
92 pt_entry_t *gd_CMAP2;
93 pt_entry_t *gd_CMAP3;
94 pt_entry_t *gd_PMAP1;
c1692ddf 95 pt_entry_t *gd_GDMAP1; /* per-cpu whole page table map */
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96 caddr_t gd_CADDR1;
97 caddr_t gd_CADDR2;
98 caddr_t gd_CADDR3;
99 unsigned *gd_PADDR1;
c1692ddf 100 unsigned *gd_GDADDR1; /* per-cpu whole page table map va */
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101 u_int gd_acpi_id;
102 u_int gd_apic_id;
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103};
104
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105#define MDGLOBALDATA_BASEALLOC_SIZE \
106 ((sizeof(struct mdglobaldata) + PAGE_MASK) & ~PAGE_MASK)
107#define MDGLOBALDATA_BASEALLOC_PAGES \
108 (MDGLOBALDATA_BASEALLOC_SIZE / PAGE_SIZE)
109#define MDGLOBALDATA_PAD \
110 (MDGLOBALDATA_BASEALLOC_SIZE - sizeof(struct mdglobaldata))
111
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112/*
113 * This is the upper (0xff800000) address space layout that is per-cpu.
114 * It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for
115 * each AP. genassym helps export this to the assembler code.
b3f81036 116 *
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117 * WARNING! page-bounded fields and page table indexes are hardwired
118 * for SMPpt[] setup in i386/i386/mp_machdep.c and locore.s.
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119 *
120 * WARNING! sizeof(privatespace[SMP_MAXCPU]) must fit in the KVA
c1692ddf 121 * reserved for the SMPpt page table (typically one page table page = 4MB).
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122 *
123 * WARNING! This structure must be a multiple of PAGE_SIZE.
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124 */
125struct privatespace {
81c04d07 126 /* main data page */
85100692 127 struct mdglobaldata mdglobaldata;
81c04d07 128 char __filler0[MDGLOBALDATA_PAD];
984263bc 129
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130 /* mapping pages - CPAGE1,CPAGE2,CPAGE3,PPAGE1 */
131 char CPAGE1[PAGE_SIZE]; /* SMPpt[n+0] */
132 char CPAGE2[PAGE_SIZE]; /* SMPpt[n+1] */
133 char CPAGE3[PAGE_SIZE]; /* SMPpt[n+2] */
134 char PPAGE1[PAGE_SIZE]; /* SMPpt[n+3] */
984263bc 135
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136 /* idle stack (UPAGES pages) */
137 char idlestack[UPAGES * PAGE_SIZE]; /* SMPpt[n+4] */
984263bc 138};
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139#define mdcpu ((struct mdglobaldata *)_get_mycpu())
140
141#endif
142
143#ifdef _KERNEL
984263bc 144
8ad65e08 145extern struct privatespace CPU_prvspace[];
3020e3be 146
ec12abe0 147#endif
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148
149#endif