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 #include <machine/segments.h> /* struct segment_descriptor */
45 #include <machine/tss.h> /* struct i386tss */
46 #include <machine/npx.h>
49 * Note on interrupt control. Pending interrupts not yet dispatched are
50 * marked in gd_fpending or gd_spending. Once dispatched the interrupt's
51 * pending bit is cleared and the interrupt is masked. Upon completion
52 * the interrupt is unmasked.
54 * For edge triggered interrupts interrupts may be enabled again at this
55 * point and if they occur before the interrupt service routine is complete
56 * the service routine will loop.
58 * The current thread's cpl is stored in the thread structure.
60 * Note: the embedded globaldata and/or the mdglobaldata structure
61 * may exceed the size of a page.
65 struct segment_descriptor gd_common_tssd;
66 struct segment_descriptor *gd_tss_gdt;
67 struct thread *gd_npxthread;
68 struct i386tss gd_common_tss;
69 union savefpu gd_savefpu; /* fast bcopy/zero temp fpu save area */
70 int gd_fpu_lock; /* fast bcopy/zero cpu lock */
73 int gd_spending; /* software interrupt pending */
74 int gd_sdelayed; /* delayed software ints */
84 pt_entry_t *gd_GDMAP1; /* per-cpu whole page table map */
89 unsigned *gd_GDADDR1; /* per-cpu whole page table map va */
92 cpumask_t gd_invltlb_ret;
96 #define MDGLOBALDATA_BASEALLOC_SIZE \
97 ((sizeof(struct mdglobaldata) + PAGE_MASK) & ~PAGE_MASK)
98 #define MDGLOBALDATA_BASEALLOC_PAGES \
99 (MDGLOBALDATA_BASEALLOC_SIZE / PAGE_SIZE)
100 #define MDGLOBALDATA_PAD \
101 (MDGLOBALDATA_BASEALLOC_SIZE - sizeof(struct mdglobaldata))
104 * This is the upper (0xff800000) address space layout that is per-cpu.
105 * It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for
106 * each AP. genassym helps export this to the assembler code.
108 * WARNING! page-bounded fields and page table indexes are hardwired
109 * for SMPpt[] setup in i386/i386/mp_machdep.c and locore.s.
111 * WARNING! sizeof(privatespace[SMP_MAXCPU]) must fit in the KVA
112 * reserved for the SMPpt page table (typically one page table page = 4MB).
114 * WARNING! This structure must be a multiple of PAGE_SIZE.
116 struct privatespace {
118 struct mdglobaldata mdglobaldata;
119 char __filler0[MDGLOBALDATA_PAD];
121 /* mapping pages - CPAGE1,CPAGE2,CPAGE3,PPAGE1 */
122 char CPAGE1[PAGE_SIZE]; /* SMPpt[n+0] */
123 char CPAGE2[PAGE_SIZE]; /* SMPpt[n+1] */
124 char CPAGE3[PAGE_SIZE]; /* SMPpt[n+2] */
125 char PPAGE1[PAGE_SIZE]; /* SMPpt[n+3] */
127 /* idle stack (UPAGES pages) */
128 char idlestack[UPAGES * PAGE_SIZE]; /* SMPpt[n+4] */
130 #define mdcpu ((struct mdglobaldata *)_get_mycpu())
136 extern struct privatespace CPU_prvspace[];