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 */ 32 33 #ifndef _MACHINE_GLOBALDATA_H_ 34 #define _MACHINE_GLOBALDATA_H_ 35 36 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 37 38 #ifndef _SYS_GLOBALDATA_H_ 39 #include <sys/globaldata.h> /* struct globaldata */ 40 #endif 41 #ifndef _SYS_THREAD_H_ 42 #include <sys/thread.h> /* struct thread */ 43 #endif 44 #ifndef _SYS_VKERNEL_H_ 45 #include <sys/vkernel.h> /* vpte_t */ 46 #endif 47 #include <machine/segments.h> /* struct segment_descriptor */ 48 #include <machine/tss.h> /* struct i386tss */ 49 #include <machine/npx.h> 50 51 /* 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. 56 * 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. 60 * 61 * The current thread's cpl is stored in the thread structure. 62 * 63 * Note: the embedded globaldata and/or the mdglobaldata structure 64 * may exceed the size of a page. 65 */ 66 struct mdglobaldata { 67 struct globaldata mi; 68 struct user_segment_descriptor gd_common_tssd; 69 struct user_segment_descriptor *gd_tss_gdt; 70 struct thread *gd_npxthread; 71 struct x86_64tss 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 */ 78 int gd_currentldt; 79 int unused001; 80 int unused002; 81 u_int unused003; 82 cpumask_t unused004; 83 u_int gd_ss_eflags; 84 }; 85 86 #define MDGLOBALDATA_BASEALLOC_SIZE \ 87 ((sizeof(struct mdglobaldata) + PAGE_MASK) & ~PAGE_MASK) 88 #define MDGLOBALDATA_BASEALLOC_PAGES \ 89 (MDGLOBALDATA_BASEALLOC_SIZE / PAGE_SIZE) 90 #define MDGLOBALDATA_PAD \ 91 (MDGLOBALDATA_BASEALLOC_SIZE - sizeof(struct mdglobaldata)) 92 93 /* 94 * This is the upper (0xff800000) address space layout that is per-cpu. 95 * It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for 96 * each AP. genassym helps export this to the assembler code. 97 * 98 * WARNING! This structure must be segment-aligned and portions within the 99 * structure must also be segment-aligned. The structure typically 100 * takes 3 segments per cpu (12MB). 101 */ 102 #define PRIVATESPACE_SEGPAD \ 103 (SEG_SIZE - \ 104 ((sizeof(struct mdglobaldata) + MDGLOBALDATA_PAD + PAGE_SIZE * 4 + \ 105 UPAGES * PAGE_SIZE) % SEG_SIZE)) \ 106 107 struct privatespace { 108 /* main data page */ 109 struct mdglobaldata mdglobaldata; 110 char __filler0[MDGLOBALDATA_PAD]; 111 112 /* idle stack (UPAGES pages) */ 113 char idlestack[UPAGES * PAGE_SIZE]; 114 }; 115 #define mdcpu ((struct mdglobaldata *)_get_mycpu()) 116 117 #endif 118 119 #ifdef _KERNEL 120 121 extern struct privatespace *CPU_prvspace; 122 123 #endif 124 125 #endif 126