2 * Copyright (c) Peter Wemm <peter@netplex.com.au>
3 * Copyright (c) 2008 The DragonFly Project.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * Only machine-dependant code should ever include this file. MI
28 * code and header files do NOT include this file. e.g. sys/globaldata.h
29 * should not include this file.
31 * $FreeBSD: src/sys/i386/include/globaldata.h,v 1.11.2.1 2000/05/16 06:58:10 dillon Exp $
32 * $DragonFly: src/sys/platform/pc64/include/globaldata.h,v 1.2 2008/08/29 17:07:17 dillon Exp $
35 #ifndef _MACHINE_GLOBALDATA_H_
36 #define _MACHINE_GLOBALDATA_H_
38 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
40 #ifndef _SYS_GLOBALDATA_H_
41 #include <sys/globaldata.h> /* struct globaldata */
43 #ifndef _SYS_THREAD_H_
44 #include <sys/thread.h> /* struct thread */
46 #ifndef _MACHINE_SEGMENTS_H_
47 #include <machine/segments.h> /* struct user_segment_descriptor */
49 #ifndef _MACHINE_TSS_H_
50 #include <machine/tss.h> /* struct x86_64tss */
52 #ifndef _MACHINE_NPX_H_
53 #include <machine/npx.h>
57 * Note on interrupt control. Pending interrupts not yet dispatched are
58 * marked in gd_fpending or gd_spending. Once dispatched the interrupt's
59 * pending bit is cleared and the interrupt is masked. Upon completion
60 * the interrupt is unmasked.
62 * For edge triggered interrupts interrupts may be enabled again at this
63 * point and if they occur before the interrupt service routine is complete
64 * the service routine will loop.
66 * The current thread's cpl is stored in the thread structure.
68 * Note: the embedded globaldata and/or the mdglobaldata structure
69 * may exceed the size of a page.
73 struct user_segment_descriptor gd_common_tssd;
74 struct user_segment_descriptor *gd_tss_gdt;
75 struct thread *gd_npxthread;
76 struct x86_64tss gd_common_tss;
77 union savefpu gd_savefpu; /* fast bcopy/zero temp fpu save area */
78 int gd_fpu_lock; /* fast bcopy/zero cpu lock */
81 int gd_spending; /* software interrupt pending */
82 int gd_sdelayed; /* delayed software ints */
88 pt_entry_t *gd_cunused0;
89 pt_entry_t *gd_cunused1;
90 pt_entry_t *gd_cunused2;
91 pt_entry_t *gd_cunused3;
95 pt_entry_t *gd_aunused3;
98 register_t gd_scratch_rsp;
100 register_t gd_user_fs; /* current user fs in MSR */
101 register_t gd_user_gs; /* current user gs in MSR */
102 cpumask_t gd_invltlb_ret;
103 u_long gd_ipending[3];
106 #define MDGLOBALDATA_BASEALLOC_SIZE \
107 ((sizeof(struct mdglobaldata) + PAGE_MASK) & ~PAGE_MASK)
108 #define MDGLOBALDATA_BASEALLOC_PAGES \
109 (MDGLOBALDATA_BASEALLOC_SIZE / PAGE_SIZE)
110 #define MDGLOBALDATA_PAD \
111 (MDGLOBALDATA_BASEALLOC_SIZE - sizeof(struct mdglobaldata))
114 * This is the upper (0xff800000) address space layout that is per-cpu.
115 * It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for
116 * each AP. genassym helps export this to the assembler code.
118 struct privatespace {
119 /* JG TODO: fix comments describing layout */
120 /* page 0 - data page */
121 struct mdglobaldata mdglobaldata;
122 char __filler0[MDGLOBALDATA_PAD];
124 /* page 1..4 - CPAGE1,CPAGE2,CPAGE3,PPAGE1 (unused) */
125 char unused1[PAGE_SIZE];
126 char unused2[PAGE_SIZE];
127 char unused3[PAGE_SIZE];
128 char unused4[PAGE_SIZE];
130 /* page 5..4+UPAGES - idle stack (UPAGES pages) */
131 char idlestack[UPAGES * PAGE_SIZE];
133 #define mdcpu ((struct mdglobaldata *)_get_mycpu())
139 extern struct privatespace CPU_prvspace[];