1*bcde3b9fSTijl Coosemans /*- 2*bcde3b9fSTijl Coosemans * Copyright (c) 1989, 1990 William F. Jolitz 3*bcde3b9fSTijl Coosemans * Copyright (c) 1990 The Regents of the University of California. 4*bcde3b9fSTijl Coosemans * All rights reserved. 5*bcde3b9fSTijl Coosemans * 6*bcde3b9fSTijl Coosemans * This code is derived from software contributed to Berkeley by 7*bcde3b9fSTijl Coosemans * William Jolitz. 8*bcde3b9fSTijl Coosemans * 9*bcde3b9fSTijl Coosemans * Redistribution and use in source and binary forms, with or without 10*bcde3b9fSTijl Coosemans * modification, are permitted provided that the following conditions 11*bcde3b9fSTijl Coosemans * are met: 12*bcde3b9fSTijl Coosemans * 1. Redistributions of source code must retain the above copyright 13*bcde3b9fSTijl Coosemans * notice, this list of conditions and the following disclaimer. 14*bcde3b9fSTijl Coosemans * 2. Redistributions in binary form must reproduce the above copyright 15*bcde3b9fSTijl Coosemans * notice, this list of conditions and the following disclaimer in the 16*bcde3b9fSTijl Coosemans * documentation and/or other materials provided with the distribution. 17*bcde3b9fSTijl Coosemans * 4. Neither the name of the University nor the names of its contributors 18*bcde3b9fSTijl Coosemans * may be used to endorse or promote products derived from this software 19*bcde3b9fSTijl Coosemans * without specific prior written permission. 20*bcde3b9fSTijl Coosemans * 21*bcde3b9fSTijl Coosemans * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22*bcde3b9fSTijl Coosemans * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23*bcde3b9fSTijl Coosemans * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24*bcde3b9fSTijl Coosemans * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25*bcde3b9fSTijl Coosemans * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26*bcde3b9fSTijl Coosemans * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27*bcde3b9fSTijl Coosemans * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28*bcde3b9fSTijl Coosemans * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29*bcde3b9fSTijl Coosemans * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30*bcde3b9fSTijl Coosemans * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31*bcde3b9fSTijl Coosemans * SUCH DAMAGE. 32*bcde3b9fSTijl Coosemans * 33*bcde3b9fSTijl Coosemans * from: @(#)segments.h 7.1 (Berkeley) 5/9/91 34*bcde3b9fSTijl Coosemans * $FreeBSD$ 35*bcde3b9fSTijl Coosemans */ 36*bcde3b9fSTijl Coosemans 37*bcde3b9fSTijl Coosemans #ifndef _X86_SEGMENTS_H_ 38*bcde3b9fSTijl Coosemans #define _X86_SEGMENTS_H_ 39*bcde3b9fSTijl Coosemans 40*bcde3b9fSTijl Coosemans /* 41*bcde3b9fSTijl Coosemans * X86 Segmentation Data Structures and definitions 42*bcde3b9fSTijl Coosemans */ 43*bcde3b9fSTijl Coosemans 44*bcde3b9fSTijl Coosemans /* 45*bcde3b9fSTijl Coosemans * Selectors 46*bcde3b9fSTijl Coosemans */ 47*bcde3b9fSTijl Coosemans #define SEL_RPL_MASK 3 /* requester priv level */ 48*bcde3b9fSTijl Coosemans #define ISPL(s) ((s)&3) /* priority level of a selector */ 49*bcde3b9fSTijl Coosemans #ifdef XEN 50*bcde3b9fSTijl Coosemans #define SEL_KPL 1 /* kernel priority level */ 51*bcde3b9fSTijl Coosemans #else 52*bcde3b9fSTijl Coosemans #define SEL_KPL 0 /* kernel priority level */ 53*bcde3b9fSTijl Coosemans #endif 54*bcde3b9fSTijl Coosemans #define SEL_UPL 3 /* user priority level */ 55*bcde3b9fSTijl Coosemans #define ISLDT(s) ((s)&SEL_LDT) /* is it local or global */ 56*bcde3b9fSTijl Coosemans #define SEL_LDT 4 /* local descriptor table */ 57*bcde3b9fSTijl Coosemans #define IDXSEL(s) (((s)>>3) & 0x1fff) /* index of selector */ 58*bcde3b9fSTijl Coosemans #define LSEL(s,r) (((s)<<3) | SEL_LDT | r) /* a local selector */ 59*bcde3b9fSTijl Coosemans #define GSEL(s,r) (((s)<<3) | r) /* a global selector */ 60*bcde3b9fSTijl Coosemans 61*bcde3b9fSTijl Coosemans /* 62*bcde3b9fSTijl Coosemans * User segment descriptors (%cs, %ds etc for i386 apps. 64 bit wide) 63*bcde3b9fSTijl Coosemans * For long-mode apps, %cs only has the conforming bit in sd_type, the sd_dpl, 64*bcde3b9fSTijl Coosemans * sd_p, sd_l and sd_def32 which must be zero). %ds only has sd_p. 65*bcde3b9fSTijl Coosemans */ 66*bcde3b9fSTijl Coosemans struct segment_descriptor { 67*bcde3b9fSTijl Coosemans unsigned sd_lolimit:16; /* segment extent (lsb) */ 68*bcde3b9fSTijl Coosemans unsigned sd_lobase:24; /* segment base address (lsb) */ 69*bcde3b9fSTijl Coosemans unsigned sd_type:5; /* segment type */ 70*bcde3b9fSTijl Coosemans unsigned sd_dpl:2; /* segment descriptor priority level */ 71*bcde3b9fSTijl Coosemans unsigned sd_p:1; /* segment descriptor present */ 72*bcde3b9fSTijl Coosemans unsigned sd_hilimit:4; /* segment extent (msb) */ 73*bcde3b9fSTijl Coosemans unsigned sd_xx:2; /* unused */ 74*bcde3b9fSTijl Coosemans unsigned sd_def32:1; /* default 32 vs 16 bit size */ 75*bcde3b9fSTijl Coosemans unsigned sd_gran:1; /* limit granularity (byte/page units)*/ 76*bcde3b9fSTijl Coosemans unsigned sd_hibase:8; /* segment base address (msb) */ 77*bcde3b9fSTijl Coosemans } __packed; 78*bcde3b9fSTijl Coosemans 79*bcde3b9fSTijl Coosemans struct user_segment_descriptor { 80*bcde3b9fSTijl Coosemans unsigned sd_lolimit:16; /* segment extent (lsb) */ 81*bcde3b9fSTijl Coosemans unsigned sd_lobase:24; /* segment base address (lsb) */ 82*bcde3b9fSTijl Coosemans unsigned sd_type:5; /* segment type */ 83*bcde3b9fSTijl Coosemans unsigned sd_dpl:2; /* segment descriptor priority level */ 84*bcde3b9fSTijl Coosemans unsigned sd_p:1; /* segment descriptor present */ 85*bcde3b9fSTijl Coosemans unsigned sd_hilimit:4; /* segment extent (msb) */ 86*bcde3b9fSTijl Coosemans unsigned sd_xx:1; /* unused */ 87*bcde3b9fSTijl Coosemans unsigned sd_long:1; /* long mode (cs only) */ 88*bcde3b9fSTijl Coosemans unsigned sd_def32:1; /* default 32 vs 16 bit size */ 89*bcde3b9fSTijl Coosemans unsigned sd_gran:1; /* limit granularity (byte/page units)*/ 90*bcde3b9fSTijl Coosemans unsigned sd_hibase:8; /* segment base address (msb) */ 91*bcde3b9fSTijl Coosemans } __packed; 92*bcde3b9fSTijl Coosemans 93*bcde3b9fSTijl Coosemans #define USD_GETBASE(sd) (((sd)->sd_lobase) | (sd)->sd_hibase << 24) 94*bcde3b9fSTijl Coosemans #define USD_SETBASE(sd, b) (sd)->sd_lobase = (b); \ 95*bcde3b9fSTijl Coosemans (sd)->sd_hibase = ((b) >> 24); 96*bcde3b9fSTijl Coosemans #define USD_GETLIMIT(sd) (((sd)->sd_lolimit) | (sd)->sd_hilimit << 16) 97*bcde3b9fSTijl Coosemans #define USD_SETLIMIT(sd, l) (sd)->sd_lolimit = (l); \ 98*bcde3b9fSTijl Coosemans (sd)->sd_hilimit = ((l) >> 16); 99*bcde3b9fSTijl Coosemans 100*bcde3b9fSTijl Coosemans #ifdef __i386__ 101*bcde3b9fSTijl Coosemans /* 102*bcde3b9fSTijl Coosemans * Gate descriptors (e.g. indirect descriptors) 103*bcde3b9fSTijl Coosemans */ 104*bcde3b9fSTijl Coosemans struct gate_descriptor { 105*bcde3b9fSTijl Coosemans unsigned gd_looffset:16; /* gate offset (lsb) */ 106*bcde3b9fSTijl Coosemans unsigned gd_selector:16; /* gate segment selector */ 107*bcde3b9fSTijl Coosemans unsigned gd_stkcpy:5; /* number of stack wds to cpy */ 108*bcde3b9fSTijl Coosemans unsigned gd_xx:3; /* unused */ 109*bcde3b9fSTijl Coosemans unsigned gd_type:5; /* segment type */ 110*bcde3b9fSTijl Coosemans unsigned gd_dpl:2; /* segment descriptor priority level */ 111*bcde3b9fSTijl Coosemans unsigned gd_p:1; /* segment descriptor present */ 112*bcde3b9fSTijl Coosemans unsigned gd_hioffset:16; /* gate offset (msb) */ 113*bcde3b9fSTijl Coosemans } __packed; 114*bcde3b9fSTijl Coosemans 115*bcde3b9fSTijl Coosemans /* 116*bcde3b9fSTijl Coosemans * Generic descriptor 117*bcde3b9fSTijl Coosemans */ 118*bcde3b9fSTijl Coosemans union descriptor { 119*bcde3b9fSTijl Coosemans struct segment_descriptor sd; 120*bcde3b9fSTijl Coosemans struct gate_descriptor gd; 121*bcde3b9fSTijl Coosemans }; 122*bcde3b9fSTijl Coosemans #else 123*bcde3b9fSTijl Coosemans /* 124*bcde3b9fSTijl Coosemans * Gate descriptors (e.g. indirect descriptors, trap, interrupt etc. 128 bit) 125*bcde3b9fSTijl Coosemans * Only interrupt and trap gates have gd_ist. 126*bcde3b9fSTijl Coosemans */ 127*bcde3b9fSTijl Coosemans struct gate_descriptor { 128*bcde3b9fSTijl Coosemans uint64_t gd_looffset:16; /* gate offset (lsb) */ 129*bcde3b9fSTijl Coosemans uint64_t gd_selector:16; /* gate segment selector */ 130*bcde3b9fSTijl Coosemans uint64_t gd_ist:3; /* IST table index */ 131*bcde3b9fSTijl Coosemans uint64_t gd_xx:5; /* unused */ 132*bcde3b9fSTijl Coosemans uint64_t gd_type:5; /* segment type */ 133*bcde3b9fSTijl Coosemans uint64_t gd_dpl:2; /* segment descriptor priority level */ 134*bcde3b9fSTijl Coosemans uint64_t gd_p:1; /* segment descriptor present */ 135*bcde3b9fSTijl Coosemans uint64_t gd_hioffset:48; /* gate offset (msb) */ 136*bcde3b9fSTijl Coosemans uint64_t sd_xx1:32; 137*bcde3b9fSTijl Coosemans } __packed; 138*bcde3b9fSTijl Coosemans 139*bcde3b9fSTijl Coosemans /* 140*bcde3b9fSTijl Coosemans * Generic descriptor 141*bcde3b9fSTijl Coosemans */ 142*bcde3b9fSTijl Coosemans union descriptor { 143*bcde3b9fSTijl Coosemans struct user_segment_descriptor sd; 144*bcde3b9fSTijl Coosemans struct gate_descriptor gd; 145*bcde3b9fSTijl Coosemans }; 146*bcde3b9fSTijl Coosemans #endif 147*bcde3b9fSTijl Coosemans 148*bcde3b9fSTijl Coosemans /* system segments and gate types */ 149*bcde3b9fSTijl Coosemans #define SDT_SYSNULL 0 /* system null */ 150*bcde3b9fSTijl Coosemans #define SDT_SYS286TSS 1 /* system 286 TSS available */ 151*bcde3b9fSTijl Coosemans #define SDT_SYSLDT 2 /* system local descriptor table */ 152*bcde3b9fSTijl Coosemans #define SDT_SYS286BSY 3 /* system 286 TSS busy */ 153*bcde3b9fSTijl Coosemans #define SDT_SYS286CGT 4 /* system 286 call gate */ 154*bcde3b9fSTijl Coosemans #define SDT_SYSTASKGT 5 /* system task gate */ 155*bcde3b9fSTijl Coosemans #define SDT_SYS286IGT 6 /* system 286 interrupt gate */ 156*bcde3b9fSTijl Coosemans #define SDT_SYS286TGT 7 /* system 286 trap gate */ 157*bcde3b9fSTijl Coosemans #define SDT_SYSNULL2 8 /* system null again */ 158*bcde3b9fSTijl Coosemans #define SDT_SYS386TSS 9 /* system 386 TSS available */ 159*bcde3b9fSTijl Coosemans #define SDT_SYSTSS 9 /* system available 64 bit TSS */ 160*bcde3b9fSTijl Coosemans #define SDT_SYSNULL3 10 /* system null again */ 161*bcde3b9fSTijl Coosemans #define SDT_SYS386BSY 11 /* system 386 TSS busy */ 162*bcde3b9fSTijl Coosemans #define SDT_SYSBSY 11 /* system busy 64 bit TSS */ 163*bcde3b9fSTijl Coosemans #define SDT_SYS386CGT 12 /* system 386 call gate */ 164*bcde3b9fSTijl Coosemans #define SDT_SYSCGT 12 /* system 64 bit call gate */ 165*bcde3b9fSTijl Coosemans #define SDT_SYSNULL4 13 /* system null again */ 166*bcde3b9fSTijl Coosemans #define SDT_SYS386IGT 14 /* system 386 interrupt gate */ 167*bcde3b9fSTijl Coosemans #define SDT_SYSIGT 14 /* system 64 bit interrupt gate */ 168*bcde3b9fSTijl Coosemans #define SDT_SYS386TGT 15 /* system 386 trap gate */ 169*bcde3b9fSTijl Coosemans #define SDT_SYSTGT 15 /* system 64 bit trap gate */ 170*bcde3b9fSTijl Coosemans 171*bcde3b9fSTijl Coosemans /* memory segment types */ 172*bcde3b9fSTijl Coosemans #define SDT_MEMRO 16 /* memory read only */ 173*bcde3b9fSTijl Coosemans #define SDT_MEMROA 17 /* memory read only accessed */ 174*bcde3b9fSTijl Coosemans #define SDT_MEMRW 18 /* memory read write */ 175*bcde3b9fSTijl Coosemans #define SDT_MEMRWA 19 /* memory read write accessed */ 176*bcde3b9fSTijl Coosemans #define SDT_MEMROD 20 /* memory read only expand dwn limit */ 177*bcde3b9fSTijl Coosemans #define SDT_MEMRODA 21 /* memory read only expand dwn limit accessed */ 178*bcde3b9fSTijl Coosemans #define SDT_MEMRWD 22 /* memory read write expand dwn limit */ 179*bcde3b9fSTijl Coosemans #define SDT_MEMRWDA 23 /* memory read write expand dwn limit accessed*/ 180*bcde3b9fSTijl Coosemans #define SDT_MEME 24 /* memory execute only */ 181*bcde3b9fSTijl Coosemans #define SDT_MEMEA 25 /* memory execute only accessed */ 182*bcde3b9fSTijl Coosemans #define SDT_MEMER 26 /* memory execute read */ 183*bcde3b9fSTijl Coosemans #define SDT_MEMERA 27 /* memory execute read accessed */ 184*bcde3b9fSTijl Coosemans #define SDT_MEMEC 28 /* memory execute only conforming */ 185*bcde3b9fSTijl Coosemans #define SDT_MEMEAC 29 /* memory execute only accessed conforming */ 186*bcde3b9fSTijl Coosemans #define SDT_MEMERC 30 /* memory execute read conforming */ 187*bcde3b9fSTijl Coosemans #define SDT_MEMERAC 31 /* memory execute read accessed conforming */ 188*bcde3b9fSTijl Coosemans 189*bcde3b9fSTijl Coosemans /* 190*bcde3b9fSTijl Coosemans * Size of IDT table 191*bcde3b9fSTijl Coosemans */ 192*bcde3b9fSTijl Coosemans #define NIDT 256 /* 32 reserved, 0x80 syscall, most are h/w */ 193*bcde3b9fSTijl Coosemans #define NRSVIDT 32 /* reserved entries for cpu exceptions */ 194*bcde3b9fSTijl Coosemans 195*bcde3b9fSTijl Coosemans /* 196*bcde3b9fSTijl Coosemans * Entries in the Interrupt Descriptor Table (IDT) 197*bcde3b9fSTijl Coosemans */ 198*bcde3b9fSTijl Coosemans #define IDT_DE 0 /* #DE: Divide Error */ 199*bcde3b9fSTijl Coosemans #define IDT_DB 1 /* #DB: Debug */ 200*bcde3b9fSTijl Coosemans #define IDT_NMI 2 /* Nonmaskable External Interrupt */ 201*bcde3b9fSTijl Coosemans #define IDT_BP 3 /* #BP: Breakpoint */ 202*bcde3b9fSTijl Coosemans #define IDT_OF 4 /* #OF: Overflow */ 203*bcde3b9fSTijl Coosemans #define IDT_BR 5 /* #BR: Bound Range Exceeded */ 204*bcde3b9fSTijl Coosemans #define IDT_UD 6 /* #UD: Undefined/Invalid Opcode */ 205*bcde3b9fSTijl Coosemans #define IDT_NM 7 /* #NM: No Math Coprocessor */ 206*bcde3b9fSTijl Coosemans #define IDT_DF 8 /* #DF: Double Fault */ 207*bcde3b9fSTijl Coosemans #define IDT_FPUGP 9 /* Coprocessor Segment Overrun */ 208*bcde3b9fSTijl Coosemans #define IDT_TS 10 /* #TS: Invalid TSS */ 209*bcde3b9fSTijl Coosemans #define IDT_NP 11 /* #NP: Segment Not Present */ 210*bcde3b9fSTijl Coosemans #define IDT_SS 12 /* #SS: Stack Segment Fault */ 211*bcde3b9fSTijl Coosemans #define IDT_GP 13 /* #GP: General Protection Fault */ 212*bcde3b9fSTijl Coosemans #define IDT_PF 14 /* #PF: Page Fault */ 213*bcde3b9fSTijl Coosemans #define IDT_MF 16 /* #MF: FPU Floating-Point Error */ 214*bcde3b9fSTijl Coosemans #define IDT_AC 17 /* #AC: Alignment Check */ 215*bcde3b9fSTijl Coosemans #define IDT_MC 18 /* #MC: Machine Check */ 216*bcde3b9fSTijl Coosemans #define IDT_XF 19 /* #XF: SIMD Floating-Point Exception */ 217*bcde3b9fSTijl Coosemans #define IDT_IO_INTS NRSVIDT /* Base of IDT entries for I/O interrupts. */ 218*bcde3b9fSTijl Coosemans #define IDT_DTRACE_RET 0x20 /* DTrace pid provider Interrupt Vector */ 219*bcde3b9fSTijl Coosemans #define IDT_SYSCALL 0x80 /* System Call Interrupt Vector */ 220*bcde3b9fSTijl Coosemans 221*bcde3b9fSTijl Coosemans #if defined(__i386__) || defined(__ia64__) 222*bcde3b9fSTijl Coosemans /* 223*bcde3b9fSTijl Coosemans * Entries in the Global Descriptor Table (GDT) 224*bcde3b9fSTijl Coosemans * Note that each 4 entries share a single 32 byte L1 cache line. 225*bcde3b9fSTijl Coosemans * Some of the fast syscall instructions require a specific order here. 226*bcde3b9fSTijl Coosemans */ 227*bcde3b9fSTijl Coosemans #define GNULL_SEL 0 /* Null Descriptor */ 228*bcde3b9fSTijl Coosemans #define GPRIV_SEL 1 /* SMP Per-Processor Private Data */ 229*bcde3b9fSTijl Coosemans #define GUFS_SEL 2 /* User %fs Descriptor (order critical: 1) */ 230*bcde3b9fSTijl Coosemans #define GUGS_SEL 3 /* User %gs Descriptor (order critical: 2) */ 231*bcde3b9fSTijl Coosemans #define GCODE_SEL 4 /* Kernel Code Descriptor (order critical: 1) */ 232*bcde3b9fSTijl Coosemans #define GDATA_SEL 5 /* Kernel Data Descriptor (order critical: 2) */ 233*bcde3b9fSTijl Coosemans #define GUCODE_SEL 6 /* User Code Descriptor (order critical: 3) */ 234*bcde3b9fSTijl Coosemans #define GUDATA_SEL 7 /* User Data Descriptor (order critical: 4) */ 235*bcde3b9fSTijl Coosemans #define GBIOSLOWMEM_SEL 8 /* BIOS low memory access (must be entry 8) */ 236*bcde3b9fSTijl Coosemans #define GPROC0_SEL 9 /* Task state process slot zero and up */ 237*bcde3b9fSTijl Coosemans #define GLDT_SEL 10 /* Default User LDT */ 238*bcde3b9fSTijl Coosemans #define GUSERLDT_SEL 11 /* User LDT */ 239*bcde3b9fSTijl Coosemans #define GPANIC_SEL 12 /* Task state to consider panic from */ 240*bcde3b9fSTijl Coosemans #define GBIOSCODE32_SEL 13 /* BIOS interface (32bit Code) */ 241*bcde3b9fSTijl Coosemans #define GBIOSCODE16_SEL 14 /* BIOS interface (16bit Code) */ 242*bcde3b9fSTijl Coosemans #define GBIOSDATA_SEL 15 /* BIOS interface (Data) */ 243*bcde3b9fSTijl Coosemans #define GBIOSUTIL_SEL 16 /* BIOS interface (Utility) */ 244*bcde3b9fSTijl Coosemans #define GBIOSARGS_SEL 17 /* BIOS interface (Arguments) */ 245*bcde3b9fSTijl Coosemans #define GNDIS_SEL 18 /* For the NDIS layer */ 246*bcde3b9fSTijl Coosemans #ifdef XEN 247*bcde3b9fSTijl Coosemans #define NGDT 9 248*bcde3b9fSTijl Coosemans #else 249*bcde3b9fSTijl Coosemans #define NGDT 19 250*bcde3b9fSTijl Coosemans #endif 251*bcde3b9fSTijl Coosemans 252*bcde3b9fSTijl Coosemans /* 253*bcde3b9fSTijl Coosemans * Entries in the Local Descriptor Table (LDT) 254*bcde3b9fSTijl Coosemans */ 255*bcde3b9fSTijl Coosemans #define LSYS5CALLS_SEL 0 /* forced by intel BCS */ 256*bcde3b9fSTijl Coosemans #define LSYS5SIGR_SEL 1 257*bcde3b9fSTijl Coosemans #define L43BSDCALLS_SEL 2 /* notyet */ 258*bcde3b9fSTijl Coosemans #define LUCODE_SEL 3 259*bcde3b9fSTijl Coosemans #define LSOL26CALLS_SEL 4 /* Solaris >= 2.6 system call gate */ 260*bcde3b9fSTijl Coosemans #define LUDATA_SEL 5 261*bcde3b9fSTijl Coosemans /* separate stack, es,fs,gs sels ? */ 262*bcde3b9fSTijl Coosemans /* #define LPOSIXCALLS_SEL 5*/ /* notyet */ 263*bcde3b9fSTijl Coosemans #define LBSDICALLS_SEL 16 /* BSDI system call gate */ 264*bcde3b9fSTijl Coosemans #define NLDT (LBSDICALLS_SEL + 1) 265*bcde3b9fSTijl Coosemans 266*bcde3b9fSTijl Coosemans #else /* !__i386__ && !__ia64__ */ 267*bcde3b9fSTijl Coosemans /* 268*bcde3b9fSTijl Coosemans * Entries in the Global Descriptor Table (GDT) 269*bcde3b9fSTijl Coosemans */ 270*bcde3b9fSTijl Coosemans #define GNULL_SEL 0 /* Null Descriptor */ 271*bcde3b9fSTijl Coosemans #define GNULL2_SEL 1 /* Null Descriptor */ 272*bcde3b9fSTijl Coosemans #define GUFS32_SEL 2 /* User 32 bit %fs Descriptor */ 273*bcde3b9fSTijl Coosemans #define GUGS32_SEL 3 /* User 32 bit %gs Descriptor */ 274*bcde3b9fSTijl Coosemans #define GCODE_SEL 4 /* Kernel Code Descriptor */ 275*bcde3b9fSTijl Coosemans #define GDATA_SEL 5 /* Kernel Data Descriptor */ 276*bcde3b9fSTijl Coosemans #define GUCODE32_SEL 6 /* User 32 bit code Descriptor */ 277*bcde3b9fSTijl Coosemans #define GUDATA_SEL 7 /* User 32/64 bit Data Descriptor */ 278*bcde3b9fSTijl Coosemans #define GUCODE_SEL 8 /* User 64 bit Code Descriptor */ 279*bcde3b9fSTijl Coosemans #define GPROC0_SEL 9 /* TSS for entering kernel etc */ 280*bcde3b9fSTijl Coosemans /* slot 10 is second half of GPROC0_SEL */ 281*bcde3b9fSTijl Coosemans #define GUSERLDT_SEL 11 /* LDT */ 282*bcde3b9fSTijl Coosemans /* slot 12 is second half of GUSERLDT_SEL */ 283*bcde3b9fSTijl Coosemans #define NGDT 13 284*bcde3b9fSTijl Coosemans #endif /* __i386__ || __ia64__ */ 285*bcde3b9fSTijl Coosemans 286*bcde3b9fSTijl Coosemans #endif /* !_X86_SEGMENTS_H_ */ 287