1 /*- 2 * Copyright (c) Peter Wemm <peter@netplex.com.au> 3 * Copyright (c) 2008 The DragonFly Project. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 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. 14 * 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 25 * SUCH DAMAGE. 26 * 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. 30 * 31 * $FreeBSD: src/sys/i386/include/globaldata.h,v 1.11.2.1 2000/05/16 06:58:10 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 #include <machine/segments.h> /* struct user_segment_descriptor */ 46 #include <machine/tss.h> /* struct x86_64tss */ 47 #include <machine/npx.h> 48 49 /* 50 * Note on interrupt control. Pending interrupts not yet dispatched are 51 * marked in gd_fpending or gd_spending. Once dispatched the interrupt's 52 * pending bit is cleared and the interrupt is masked. Upon completion 53 * the interrupt is unmasked. 54 * 55 * For edge triggered interrupts interrupts may be enabled again at this 56 * point and if they occur before the interrupt service routine is complete 57 * the service routine will loop. 58 * 59 * The current thread's cpl is stored in the thread structure. 60 * 61 * Note: the embedded globaldata and/or the mdglobaldata structure 62 * may exceed the size of a page. 63 */ 64 struct mdglobaldata { 65 struct globaldata mi; 66 struct user_segment_descriptor gd_common_tssd; 67 struct user_segment_descriptor *gd_tss_gdt; 68 struct thread *gd_npxthread; 69 struct x86_64tss gd_common_tss; 70 union savefpu gd_savefpu; /* fast bcopy/zero temp fpu save area */ 71 int gd_fpu_lock; /* fast bcopy/zero cpu lock */ 72 int gd_xinvaltlb; /* reentrancy check invaltlb routine */ 73 int gd_unused001; 74 int gd_spending; /* software interrupt pending */ 75 int gd_sdelayed; /* delayed software ints */ 76 int gd_currentldt; 77 int gd_private_tss; 78 u_int gd_unused002; 79 u_int gd_unused003; 80 u_int gd_ss_eflags; 81 pt_entry_t *gd_cunused0; 82 pt_entry_t *gd_cunused1; 83 pt_entry_t *gd_cunused2; 84 pt_entry_t *gd_cunused3; 85 caddr_t gd_aunused0; 86 caddr_t gd_aunused1; 87 caddr_t gd_aunused2; 88 pt_entry_t *gd_aunused3; 89 u_int gd_acpi_id; 90 u_int gd_apic_id; 91 register_t gd_scratch_rsp; 92 register_t unused004; 93 register_t gd_user_fs; /* current user fs in MSR */ 94 register_t gd_user_gs; /* current user gs in MSR */ 95 cpumask_t gd_unused006; 96 u_long gd_ipending[3]; 97 }; 98 99 #define MDGLOBALDATA_BASEALLOC_SIZE \ 100 ((sizeof(struct mdglobaldata) + PAGE_MASK) & ~PAGE_MASK) 101 #define MDGLOBALDATA_BASEALLOC_PAGES \ 102 (MDGLOBALDATA_BASEALLOC_SIZE / PAGE_SIZE) 103 #define MDGLOBALDATA_PAD \ 104 (MDGLOBALDATA_BASEALLOC_SIZE - sizeof(struct mdglobaldata)) 105 106 /* 107 * This is the upper (0xff800000) address space layout that is per-cpu. 108 * It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for 109 * each AP. genassym helps export this to the assembler code. 110 */ 111 struct privatespace { 112 /* JG TODO: fix comments describing layout */ 113 /* page 0 - data page */ 114 struct mdglobaldata mdglobaldata; 115 char __filler0[MDGLOBALDATA_PAD]; 116 117 /* page 1..4 - CPAGE1,CPAGE2,CPAGE3,PPAGE1 (unused) */ 118 char unused1[PAGE_SIZE]; 119 char unused2[PAGE_SIZE]; 120 char unused3[PAGE_SIZE]; 121 char unused4[PAGE_SIZE]; 122 123 /* page 5..4+UPAGES - idle stack (UPAGES pages) */ 124 char idlestack[UPAGES * PAGE_SIZE]; 125 }; 126 #define mdcpu ((struct mdglobaldata *)_get_mycpu()) 127 128 #endif 129 130 #ifdef _KERNEL 131 132 extern struct privatespace *CPU_prvspace[]; 133 134 #endif 135 136 #endif 137