2 * Copyright (c) Peter Wemm <peter@netplex.com.au>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
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.
30 * $FreeBSD: src/sys/i386/include/globaldata.h,v 1.11.2.1 2000/05/16 06:58:10 dillon Exp $
33 #ifndef _MACHINE_GLOBALDATA_H_
34 #define _MACHINE_GLOBALDATA_H_
36 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
38 #ifndef _SYS_GLOBALDATA_H_
39 #include <sys/globaldata.h> /* struct globaldata */
41 #ifndef _SYS_THREAD_H_
42 #include <sys/thread.h> /* struct thread */
44 #ifndef _SYS_VKERNEL_H_
45 #include <sys/vkernel.h> /* vpte_t */
47 #include <machine/segments.h> /* struct segment_descriptor */
48 #include <machine/tss.h> /* struct i386tss */
49 #include <machine/npx.h>
52 * Note on interrupt control. Pending interrupts not yet dispatched are
53 * marked in gd_fpending, gd_ipending, or gd_spending. Once dispatched
54 * the interrupt's pending bit is cleared and the interrupt is masked.
55 * Upon completion the interrupt is unmasked.
57 * For edge triggered interrupts interrupts may be enabled again at this
58 * point and if they occur before the interrupt service routine is complete
59 * the service routine will loop.
61 * The current thread's cpl is stored in the thread structure.
63 * Note: the embedded globaldata and/or the mdglobaldata structure
64 * may exceed the size of a page.
68 struct segment_descriptor gd_common_tssd;
69 struct segment_descriptor *gd_tss_gdt;
70 struct thread *gd_npxthread;
71 struct i386tss gd_common_tss;
72 union savefpu gd_savefpu; /* fast bcopy/zero temp fpu save area */
73 int gd_fpu_lock; /* fast bcopy/zero cpu lock */
74 int gd_fpending; /* fast interrupt pending */
75 int gd_ipending; /* normal interrupt pending */
76 int gd_spending; /* software interrupt pending */
77 int gd_sdelayed; /* delayed software ints */
84 vpte_t *gd_CMAP1; /* pointer to pte for CADDR1 */
95 * Page table mappings, see get_ptbase()
97 vpte_t *gd_PT1map; /* points into privatedata */
98 vpte_t *gd_PT1pdir; /* KVA of page directory */
99 vpte_t *gd_PT1pde; /* pointer to pde */
105 vpte_t *gd_PT3map; /* used from preemptive interrupt */
110 #define MDGLOBALDATA_BASEALLOC_SIZE \
111 ((sizeof(struct mdglobaldata) + PAGE_MASK) & ~PAGE_MASK)
112 #define MDGLOBALDATA_BASEALLOC_PAGES \
113 (MDGLOBALDATA_BASEALLOC_SIZE / PAGE_SIZE)
114 #define MDGLOBALDATA_PAD \
115 (MDGLOBALDATA_BASEALLOC_SIZE - sizeof(struct mdglobaldata))
118 * This is the upper (0xff800000) address space layout that is per-cpu.
119 * It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for
120 * each AP. genassym helps export this to the assembler code.
122 * WARNING! This structure must be segment-aligned and portions within the
123 * structure must also be segment-aligned. The structure typically
124 * takes 3 segments per cpu (12MB).
126 #define PRIVATESPACE_SEGPAD \
128 ((sizeof(struct mdglobaldata) + MDGLOBALDATA_PAD + PAGE_SIZE * 4 + \
129 UPAGES * PAGE_SIZE) % SEG_SIZE)) \
131 struct privatespace {
133 struct mdglobaldata mdglobaldata;
134 char __filler0[MDGLOBALDATA_PAD];
136 /* mapping pages - CPAGE1,CPAGE2,CPAGE3,PPAGE1 */
137 char CPAGE1[PAGE_SIZE];
138 char CPAGE2[PAGE_SIZE];
139 char CPAGE3[PAGE_SIZE];
140 vpte_t PPAGE1[PAGE_SIZE / sizeof(vpte_t)];
142 /* idle stack (UPAGES pages) */
143 char idlestack[UPAGES * PAGE_SIZE];
145 /* we must PAD to SEG_SIZE */
146 char __filler1[PRIVATESPACE_SEGPAD];
147 vpte_t PT1MAP[SEG_SIZE / sizeof(vpte_t)];
148 vpte_t PT2MAP[SEG_SIZE / sizeof(vpte_t)];
149 vpte_t PT3MAP[SEG_SIZE / sizeof(vpte_t)];
151 #define mdcpu ((struct mdglobaldata *)_get_mycpu())
157 extern struct privatespace *CPU_prvspace;