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 struct pv_entry; 50 51 /* 52 * Note on interrupt control. Pending interrupts not yet dispatched are 53 * marked in gd_fpending or gd_spending. Once dispatched the interrupt's 54 * pending bit is cleared and the interrupt is masked. Upon completion 55 * 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; /* gd_gdt[GPROC0_SEL] */ 70 struct thread *gd_npxthread; 71 union savefpu gd_savefpu; /* fast bcopy/zero temp fpu save area */ 72 union savefpu gd_zerofpu; /* xrstor/fxrstor/frstor zero regs */ 73 int gd_fpu_lock; /* fast bcopy/zero cpu lock */ 74 int gd_xinvaltlb; /* reentrancy check invaltlb routine */ 75 int gd_unused001; 76 int gd_spending; /* software interrupt pending */ 77 int gd_sdelayed; /* delayed software ints */ 78 int gd_currentldt; 79 int gd_private_tss; 80 u_int gd_unused002; 81 u_int gd_unused003; 82 u_int gd_ss_eflags; 83 struct user_segment_descriptor *gd_gdt; /* pcpu gdt[] table */ 84 long gd_lunused1; 85 long gd_lunused2; 86 long gd_lunusde3; 87 caddr_t gd_aunused0; 88 caddr_t gd_aunused1; 89 caddr_t gd_aunused2; 90 struct pv_entry *gd_newpv; 91 u_int gd_acpi_id; 92 u_int gd_apic_id; 93 register_t gd_unused004; 94 register_t gd_unused005; 95 register_t gd_user_fs; /* current user fs in MSR */ 96 register_t gd_user_gs; /* current user gs in MSR */ 97 cpumask_t gd_unused006; 98 u_long gd_ipending[3]; 99 }; 100 101 #define MDGLOBALDATA_BASEALLOC_SIZE \ 102 ((sizeof(struct mdglobaldata) + PAGE_MASK) & ~PAGE_MASK) 103 #define MDGLOBALDATA_BASEALLOC_PAGES \ 104 (MDGLOBALDATA_BASEALLOC_SIZE / PAGE_SIZE) 105 #define MDGLOBALDATA_PAD \ 106 (MDGLOBALDATA_BASEALLOC_SIZE - sizeof(struct mdglobaldata)) 107 108 /* 109 * This is the upper (0xff800000) address space layout that is per-cpu. 110 * It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for 111 * each AP. genassym helps export this to the assembler code. 112 * 113 * Most of the major elements in struct privatespace must be 114 * PAGE_SIZE aligned. 115 */ 116 struct privatespace { 117 /* 118 * page 0 - data page 119 */ 120 struct mdglobaldata mdglobaldata; 121 char __filler0[MDGLOBALDATA_PAD]; 122 123 /* 124 * page 1 - Unused (unmapped) 125 */ 126 char unused2[PAGE_SIZE]; 127 128 /* 129 * page 2 - Trampoline page. Put the trampoline and common_tss 130 * in the same page to make them easier to isolate 131 * from the rest of the kernel map. See x86_64/pmap.c 132 * 133 * rsp0 points into trampoline. Interrupts are always 134 * disabled for this case but leave reserved1[] 135 * reserved just in case. 136 */ 137 char reserved1[PAGE_SIZE - 138 sizeof(struct trampframe) - 139 sizeof(uint64_t) - 140 sizeof(struct x86_64tss)]; 141 struct trampframe trampoline; 142 uint64_t reserved1b; /* 16-byte-align trampoline */ 143 struct x86_64tss common_tss; /* (misaligned by 8 bytes) */ 144 145 /* 146 * page 3, 4 - NMI, Double fault stack 147 * page 5, 6 - Debug fault stack 148 */ 149 char dblstack[PAGE_SIZE * 2 - 150 sizeof(struct trampframe)]; 151 struct trampframe dbltramp; 152 char dbgstack[PAGE_SIZE * 2 - 153 sizeof(struct trampframe)]; 154 struct trampframe dbgtramp; 155 156 /* page 7+ - idle stack (UPAGES pages) */ 157 char idlestack[UPAGES * PAGE_SIZE]; 158 } __packed; 159 160 #define mdcpu ((struct mdglobaldata *)_get_mycpu()) 161 #define pscpu ((struct privatespace *)_get_mycpu()) 162 163 #endif 164 165 #ifdef _KERNEL 166 167 extern struct privatespace *CPU_prvspace[]; 168 169 #endif 170 171 #endif 172