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 * 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 * 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 $ 32 */ 33 34 #ifndef _MACHINE_GLOBALDATA_H_ 35 #define _MACHINE_GLOBALDATA_H_ 36 37 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 38 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 _SYS_VKERNEL_H_ 46 #include <sys/vkernel.h> /* vpte_t */ 47 #endif 48 #ifndef _MACHINE_SEGMENTS_H_ 49 #include <machine/segments.h> /* struct segment_descriptor */ 50 #endif 51 #ifndef _MACHINE_TSS_H_ 52 #include <machine/tss.h> /* struct i386tss */ 53 #endif 54 #ifndef _MACHINE_NPX_H_ 55 #include <machine/npx.h> 56 #endif 57 58 /* 59 * Note on interrupt control. Pending interrupts not yet dispatched are 60 * marked in gd_fpending, gd_ipending, or gd_spending. Once dispatched 61 * the interrupt's pending bit is cleared and the interrupt is masked. 62 * Upon completion the interrupt is unmasked. 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. 69 * 70 * Note: the embedded globaldata and/or the mdglobaldata structure 71 * may exceed the size of a page. 72 */ 73 struct mdglobaldata { 74 struct globaldata mi; 75 struct user_segment_descriptor gd_common_tssd; 76 struct user_segment_descriptor *gd_tss_gdt; 77 struct thread *gd_npxthread; 78 struct x86_64tss gd_common_tss; 79 union savefpu gd_savefpu; /* fast bcopy/zero temp fpu save area */ 80 int gd_fpu_lock; /* fast bcopy/zero cpu lock */ 81 int gd_fpending; /* fast interrupt pending */ 82 int gd_ipending; /* normal interrupt pending */ 83 int gd_spending; /* software interrupt pending */ 84 int gd_sdelayed; /* delayed software ints */ 85 int gd_currentldt; 86 int unused001; 87 int unused002; 88 u_int unused003; 89 cpumask_t unused004; 90 u_int gd_ss_eflags; 91 }; 92 93 #define MDGLOBALDATA_BASEALLOC_SIZE \ 94 ((sizeof(struct mdglobaldata) + PAGE_MASK) & ~PAGE_MASK) 95 #define MDGLOBALDATA_BASEALLOC_PAGES \ 96 (MDGLOBALDATA_BASEALLOC_SIZE / PAGE_SIZE) 97 #define MDGLOBALDATA_PAD \ 98 (MDGLOBALDATA_BASEALLOC_SIZE - sizeof(struct mdglobaldata)) 99 100 /* 101 * This is the upper (0xff800000) address space layout that is per-cpu. 102 * It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for 103 * each AP. genassym helps export this to the assembler code. 104 * 105 * WARNING! This structure must be segment-aligned and portions within the 106 * structure must also be segment-aligned. The structure typically 107 * takes 3 segments per cpu (12MB). 108 */ 109 #define PRIVATESPACE_SEGPAD \ 110 (SEG_SIZE - \ 111 ((sizeof(struct mdglobaldata) + MDGLOBALDATA_PAD + PAGE_SIZE * 4 + \ 112 UPAGES * PAGE_SIZE) % SEG_SIZE)) \ 113 114 struct privatespace { 115 /* main data page */ 116 struct mdglobaldata mdglobaldata; 117 char __filler0[MDGLOBALDATA_PAD]; 118 119 /* idle stack (UPAGES pages) */ 120 char idlestack[UPAGES * PAGE_SIZE]; 121 }; 122 #define mdcpu ((struct mdglobaldata *)_get_mycpu()) 123 124 #endif 125 126 #ifdef _KERNEL 127 128 extern struct privatespace *CPU_prvspace; 129 130 #endif 131 132 #endif 133