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 $
31 * $DragonFly: src/sys/platform/vkernel/include/globaldata.h,v 1.8 2008/04/28 07:05:07 dillon Exp $
34 #ifndef _MACHINE_GLOBALDATA_H_
35 #define _MACHINE_GLOBALDATA_H_
37 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
39 #ifndef _SYS_GLOBALDATA_H_
40 #include <sys/globaldata.h> /* struct globaldata */
42 #ifndef _SYS_THREAD_H_
43 #include <sys/thread.h> /* struct thread */
45 #ifndef _SYS_VKERNEL_H_
46 #include <sys/vkernel.h> /* vpte_t */
48 #ifndef _MACHINE_SEGMENTS_H_
49 #include <machine/segments.h> /* struct segment_descriptor */
51 #ifndef _MACHINE_TSS_H_
52 #include <machine/tss.h> /* struct i386tss */
54 #ifndef _MACHINE_NPX_H_
55 #include <machine/npx.h>
58 #include <cpu/lwbuf.h>
62 * Note on interrupt control. Pending interrupts not yet dispatched are
63 * marked in gd_fpending, gd_ipending, or gd_spending. Once dispatched
64 * the interrupt's pending bit is cleared and the interrupt is masked.
65 * Upon completion the interrupt is unmasked.
67 * For edge triggered interrupts interrupts may be enabled again at this
68 * point and if they occur before the interrupt service routine is complete
69 * the service routine will loop.
71 * The current thread's cpl is stored in the thread structure.
73 * Note: the embedded globaldata and/or the mdglobaldata structure
74 * may exceed the size of a page.
78 struct segment_descriptor gd_common_tssd;
79 struct segment_descriptor *gd_tss_gdt;
80 struct thread *gd_npxthread;
81 struct i386tss gd_common_tss;
82 struct lwbuf_free_kvp_list gd_lwbuf_fpages; /* lwbuf: free kva */
83 union savefpu gd_savefpu; /* fast bcopy/zero temp fpu save area */
84 int gd_fpu_lock; /* fast bcopy/zero cpu lock */
85 int gd_fpending; /* fast interrupt pending */
86 int gd_ipending; /* normal interrupt pending */
87 int gd_spending; /* software interrupt pending */
88 int gd_sdelayed; /* delayed software ints */
95 vpte_t *gd_CMAP1; /* pointer to pte for CADDR1 */
106 * Page table mappings, see get_ptbase()
108 vpte_t *gd_PT1map; /* points into privatedata */
109 vpte_t *gd_PT1pdir; /* KVA of page directory */
110 vpte_t *gd_PT1pde; /* pointer to pde */
116 vpte_t *gd_PT3map; /* used from preemptive interrupt */
121 #define MDGLOBALDATA_BASEALLOC_SIZE \
122 ((sizeof(struct mdglobaldata) + PAGE_MASK) & ~PAGE_MASK)
123 #define MDGLOBALDATA_BASEALLOC_PAGES \
124 (MDGLOBALDATA_BASEALLOC_SIZE / PAGE_SIZE)
125 #define MDGLOBALDATA_PAD \
126 (MDGLOBALDATA_BASEALLOC_SIZE - sizeof(struct mdglobaldata))
129 * This is the upper (0xff800000) address space layout that is per-cpu.
130 * It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for
131 * each AP. genassym helps export this to the assembler code.
133 * WARNING! This structure must be segment-aligned and portions within the
134 * structure must also be segment-aligned. The structure typically
135 * takes 3 segments per cpu (12MB).
137 #define PRIVATESPACE_SEGPAD \
139 ((sizeof(struct mdglobaldata) + MDGLOBALDATA_PAD + PAGE_SIZE * 4 + \
140 UPAGES * PAGE_SIZE) % SEG_SIZE)) \
142 struct privatespace {
144 struct mdglobaldata mdglobaldata;
145 char __filler0[MDGLOBALDATA_PAD];
147 /* mapping pages - CPAGE1,CPAGE2,CPAGE3,PPAGE1 */
148 char CPAGE1[PAGE_SIZE];
149 char CPAGE2[PAGE_SIZE];
150 char CPAGE3[PAGE_SIZE];
151 vpte_t PPAGE1[PAGE_SIZE / sizeof(vpte_t)];
153 /* idle stack (UPAGES pages) */
154 char idlestack[UPAGES * PAGE_SIZE];
156 /* we must PAD to SEG_SIZE */
157 char __filler1[PRIVATESPACE_SEGPAD];
158 vpte_t PT1MAP[SEG_SIZE / sizeof(vpte_t)];
159 vpte_t PT2MAP[SEG_SIZE / sizeof(vpte_t)];
160 vpte_t PT3MAP[SEG_SIZE / sizeof(vpte_t)];
162 #define mdcpu ((struct mdglobaldata *)_get_mycpu())
168 extern struct privatespace *CPU_prvspace;