14c87aefeSPatrick Mooney /*- 24c87aefeSPatrick Mooney * Copyright (c) 1989, 1990 William F. Jolitz 34c87aefeSPatrick Mooney * Copyright (c) 1990 The Regents of the University of California. 44c87aefeSPatrick Mooney * All rights reserved. 54c87aefeSPatrick Mooney * 64c87aefeSPatrick Mooney * This code is derived from software contributed to Berkeley by 74c87aefeSPatrick Mooney * William Jolitz. 84c87aefeSPatrick Mooney * 94c87aefeSPatrick Mooney * Redistribution and use in source and binary forms, with or without 104c87aefeSPatrick Mooney * modification, are permitted provided that the following conditions 114c87aefeSPatrick Mooney * are met: 124c87aefeSPatrick Mooney * 1. Redistributions of source code must retain the above copyright 134c87aefeSPatrick Mooney * notice, this list of conditions and the following disclaimer. 144c87aefeSPatrick Mooney * 2. Redistributions in binary form must reproduce the above copyright 154c87aefeSPatrick Mooney * notice, this list of conditions and the following disclaimer in the 164c87aefeSPatrick Mooney * documentation and/or other materials provided with the distribution. 174c87aefeSPatrick Mooney * 3. Neither the name of the University nor the names of its contributors 184c87aefeSPatrick Mooney * may be used to endorse or promote products derived from this software 194c87aefeSPatrick Mooney * without specific prior written permission. 204c87aefeSPatrick Mooney * 214c87aefeSPatrick Mooney * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 224c87aefeSPatrick Mooney * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 234c87aefeSPatrick Mooney * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 244c87aefeSPatrick Mooney * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 254c87aefeSPatrick Mooney * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 264c87aefeSPatrick Mooney * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 274c87aefeSPatrick Mooney * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 284c87aefeSPatrick Mooney * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 294c87aefeSPatrick Mooney * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 304c87aefeSPatrick Mooney * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 314c87aefeSPatrick Mooney * SUCH DAMAGE. 324c87aefeSPatrick Mooney * 334c87aefeSPatrick Mooney * from: @(#)segments.h 7.1 (Berkeley) 5/9/91 344c87aefeSPatrick Mooney * $FreeBSD$ 354c87aefeSPatrick Mooney */ 364c87aefeSPatrick Mooney 374c87aefeSPatrick Mooney #ifndef _X86_SEGMENTS_H_ 384c87aefeSPatrick Mooney #define _X86_SEGMENTS_H_ 394c87aefeSPatrick Mooney 404c87aefeSPatrick Mooney /* 414c87aefeSPatrick Mooney * X86 Segmentation Data Structures and definitions 424c87aefeSPatrick Mooney */ 434c87aefeSPatrick Mooney 444c87aefeSPatrick Mooney /* 454c87aefeSPatrick Mooney * Selectors 464c87aefeSPatrick Mooney */ 474c87aefeSPatrick Mooney #define SEL_RPL_MASK 3 /* requester priv level */ 484c87aefeSPatrick Mooney #define ISPL(s) ((s)&3) /* priority level of a selector */ 494c87aefeSPatrick Mooney #define SEL_KPL 0 /* kernel priority level */ 504c87aefeSPatrick Mooney #define SEL_UPL 3 /* user priority level */ 514c87aefeSPatrick Mooney #define ISLDT(s) ((s)&SEL_LDT) /* is it local or global */ 524c87aefeSPatrick Mooney #define SEL_LDT 4 /* local descriptor table */ 534c87aefeSPatrick Mooney #define IDXSEL(s) (((s)>>3) & 0x1fff) /* index of selector */ 544c87aefeSPatrick Mooney #define LSEL(s,r) (((s)<<3) | SEL_LDT | r) /* a local selector */ 554c87aefeSPatrick Mooney #define GSEL(s,r) (((s)<<3) | r) /* a global selector */ 564c87aefeSPatrick Mooney 574c87aefeSPatrick Mooney /* 584c87aefeSPatrick Mooney * User segment descriptors (%cs, %ds etc for i386 apps. 64 bit wide) 594c87aefeSPatrick Mooney * For long-mode apps, %cs only has the conforming bit in sd_type, the sd_dpl, 604c87aefeSPatrick Mooney * sd_p, sd_l and sd_def32 which must be zero). %ds only has sd_p. 614c87aefeSPatrick Mooney */ 624c87aefeSPatrick Mooney struct segment_descriptor { 634c87aefeSPatrick Mooney unsigned sd_lolimit:16; /* segment extent (lsb) */ 644c87aefeSPatrick Mooney unsigned sd_lobase:24; /* segment base address (lsb) */ 654c87aefeSPatrick Mooney unsigned sd_type:5; /* segment type */ 664c87aefeSPatrick Mooney unsigned sd_dpl:2; /* segment descriptor priority level */ 674c87aefeSPatrick Mooney unsigned sd_p:1; /* segment descriptor present */ 684c87aefeSPatrick Mooney unsigned sd_hilimit:4; /* segment extent (msb) */ 694c87aefeSPatrick Mooney unsigned sd_xx:2; /* unused */ 704c87aefeSPatrick Mooney unsigned sd_def32:1; /* default 32 vs 16 bit size */ 714c87aefeSPatrick Mooney unsigned sd_gran:1; /* limit granularity (byte/page units)*/ 724c87aefeSPatrick Mooney unsigned sd_hibase:8; /* segment base address (msb) */ 734c87aefeSPatrick Mooney } __packed; 744c87aefeSPatrick Mooney 754c87aefeSPatrick Mooney struct user_segment_descriptor { 764c87aefeSPatrick Mooney unsigned sd_lolimit:16; /* segment extent (lsb) */ 774c87aefeSPatrick Mooney unsigned sd_lobase:24; /* segment base address (lsb) */ 784c87aefeSPatrick Mooney unsigned sd_type:5; /* segment type */ 794c87aefeSPatrick Mooney unsigned sd_dpl:2; /* segment descriptor priority level */ 804c87aefeSPatrick Mooney unsigned sd_p:1; /* segment descriptor present */ 814c87aefeSPatrick Mooney unsigned sd_hilimit:4; /* segment extent (msb) */ 824c87aefeSPatrick Mooney unsigned sd_xx:1; /* unused */ 834c87aefeSPatrick Mooney unsigned sd_long:1; /* long mode (cs only) */ 844c87aefeSPatrick Mooney unsigned sd_def32:1; /* default 32 vs 16 bit size */ 854c87aefeSPatrick Mooney unsigned sd_gran:1; /* limit granularity (byte/page units)*/ 864c87aefeSPatrick Mooney unsigned sd_hibase:8; /* segment base address (msb) */ 874c87aefeSPatrick Mooney } __packed; 884c87aefeSPatrick Mooney 894c87aefeSPatrick Mooney #define USD_GETBASE(sd) (((sd)->sd_lobase) | (sd)->sd_hibase << 24) 904c87aefeSPatrick Mooney #define USD_SETBASE(sd, b) (sd)->sd_lobase = (b); \ 914c87aefeSPatrick Mooney (sd)->sd_hibase = ((b) >> 24); 924c87aefeSPatrick Mooney #define USD_GETLIMIT(sd) (((sd)->sd_lolimit) | (sd)->sd_hilimit << 16) 934c87aefeSPatrick Mooney #define USD_SETLIMIT(sd, l) (sd)->sd_lolimit = (l); \ 944c87aefeSPatrick Mooney (sd)->sd_hilimit = ((l) >> 16); 954c87aefeSPatrick Mooney 964c87aefeSPatrick Mooney #ifdef __i386__ 974c87aefeSPatrick Mooney /* 984c87aefeSPatrick Mooney * Gate descriptors (e.g. indirect descriptors) 994c87aefeSPatrick Mooney */ 1004c87aefeSPatrick Mooney struct gate_descriptor { 1014c87aefeSPatrick Mooney unsigned gd_looffset:16; /* gate offset (lsb) */ 1024c87aefeSPatrick Mooney unsigned gd_selector:16; /* gate segment selector */ 1034c87aefeSPatrick Mooney unsigned gd_stkcpy:5; /* number of stack wds to cpy */ 1044c87aefeSPatrick Mooney unsigned gd_xx:3; /* unused */ 1054c87aefeSPatrick Mooney unsigned gd_type:5; /* segment type */ 1064c87aefeSPatrick Mooney unsigned gd_dpl:2; /* segment descriptor priority level */ 1074c87aefeSPatrick Mooney unsigned gd_p:1; /* segment descriptor present */ 1084c87aefeSPatrick Mooney unsigned gd_hioffset:16; /* gate offset (msb) */ 1094c87aefeSPatrick Mooney } __packed; 1104c87aefeSPatrick Mooney 1114c87aefeSPatrick Mooney /* 1124c87aefeSPatrick Mooney * Generic descriptor 1134c87aefeSPatrick Mooney */ 1144c87aefeSPatrick Mooney union descriptor { 1154c87aefeSPatrick Mooney struct segment_descriptor sd; 1164c87aefeSPatrick Mooney struct gate_descriptor gd; 1174c87aefeSPatrick Mooney }; 1184c87aefeSPatrick Mooney #else 1194c87aefeSPatrick Mooney /* 1204c87aefeSPatrick Mooney * Gate descriptors (e.g. indirect descriptors, trap, interrupt etc. 128 bit) 1214c87aefeSPatrick Mooney * Only interrupt and trap gates have gd_ist. 1224c87aefeSPatrick Mooney */ 1234c87aefeSPatrick Mooney struct gate_descriptor { 1244c87aefeSPatrick Mooney uint64_t gd_looffset:16; /* gate offset (lsb) */ 1254c87aefeSPatrick Mooney uint64_t gd_selector:16; /* gate segment selector */ 1264c87aefeSPatrick Mooney uint64_t gd_ist:3; /* IST table index */ 1274c87aefeSPatrick Mooney uint64_t gd_xx:5; /* unused */ 1284c87aefeSPatrick Mooney uint64_t gd_type:5; /* segment type */ 1294c87aefeSPatrick Mooney uint64_t gd_dpl:2; /* segment descriptor priority level */ 1304c87aefeSPatrick Mooney uint64_t gd_p:1; /* segment descriptor present */ 1314c87aefeSPatrick Mooney uint64_t gd_hioffset:48; /* gate offset (msb) */ 1324c87aefeSPatrick Mooney uint64_t sd_xx1:32; 1334c87aefeSPatrick Mooney } __packed; 1344c87aefeSPatrick Mooney 1354c87aefeSPatrick Mooney /* 1364c87aefeSPatrick Mooney * Generic descriptor 1374c87aefeSPatrick Mooney */ 1384c87aefeSPatrick Mooney union descriptor { 1394c87aefeSPatrick Mooney struct user_segment_descriptor sd; 1404c87aefeSPatrick Mooney struct gate_descriptor gd; 1414c87aefeSPatrick Mooney }; 1424c87aefeSPatrick Mooney #endif 1434c87aefeSPatrick Mooney 1444c87aefeSPatrick Mooney /* system segments and gate types */ 1454c87aefeSPatrick Mooney #define SDT_SYSNULL 0 /* system null */ 1464c87aefeSPatrick Mooney #define SDT_SYS286TSS 1 /* system 286 TSS available */ 1474c87aefeSPatrick Mooney #define SDT_SYSLDT 2 /* system local descriptor table */ 1484c87aefeSPatrick Mooney #define SDT_SYS286BSY 3 /* system 286 TSS busy */ 1494c87aefeSPatrick Mooney #define SDT_SYS286CGT 4 /* system 286 call gate */ 1504c87aefeSPatrick Mooney #define SDT_SYSTASKGT 5 /* system task gate */ 1514c87aefeSPatrick Mooney #define SDT_SYS286IGT 6 /* system 286 interrupt gate */ 1524c87aefeSPatrick Mooney #define SDT_SYS286TGT 7 /* system 286 trap gate */ 1534c87aefeSPatrick Mooney #define SDT_SYSNULL2 8 /* system null again */ 1544c87aefeSPatrick Mooney #define SDT_SYS386TSS 9 /* system 386 TSS available */ 1554c87aefeSPatrick Mooney #define SDT_SYSTSS 9 /* system available 64 bit TSS */ 1564c87aefeSPatrick Mooney #define SDT_SYSNULL3 10 /* system null again */ 1574c87aefeSPatrick Mooney #define SDT_SYS386BSY 11 /* system 386 TSS busy */ 1584c87aefeSPatrick Mooney #define SDT_SYSBSY 11 /* system busy 64 bit TSS */ 1594c87aefeSPatrick Mooney #define SDT_SYS386CGT 12 /* system 386 call gate */ 1604c87aefeSPatrick Mooney #define SDT_SYSCGT 12 /* system 64 bit call gate */ 1614c87aefeSPatrick Mooney #define SDT_SYSNULL4 13 /* system null again */ 1624c87aefeSPatrick Mooney #define SDT_SYS386IGT 14 /* system 386 interrupt gate */ 1634c87aefeSPatrick Mooney #define SDT_SYSIGT 14 /* system 64 bit interrupt gate */ 1644c87aefeSPatrick Mooney #define SDT_SYS386TGT 15 /* system 386 trap gate */ 1654c87aefeSPatrick Mooney #define SDT_SYSTGT 15 /* system 64 bit trap gate */ 1664c87aefeSPatrick Mooney 1674c87aefeSPatrick Mooney /* memory segment types */ 1684c87aefeSPatrick Mooney #define SDT_MEMRO 16 /* memory read only */ 1694c87aefeSPatrick Mooney #define SDT_MEMROA 17 /* memory read only accessed */ 1704c87aefeSPatrick Mooney #define SDT_MEMRW 18 /* memory read write */ 1714c87aefeSPatrick Mooney #define SDT_MEMRWA 19 /* memory read write accessed */ 1724c87aefeSPatrick Mooney #define SDT_MEMROD 20 /* memory read only expand dwn limit */ 1734c87aefeSPatrick Mooney #define SDT_MEMRODA 21 /* memory read only expand dwn limit accessed */ 1744c87aefeSPatrick Mooney #define SDT_MEMRWD 22 /* memory read write expand dwn limit */ 1754c87aefeSPatrick Mooney #define SDT_MEMRWDA 23 /* memory read write expand dwn limit accessed*/ 1764c87aefeSPatrick Mooney #define SDT_MEME 24 /* memory execute only */ 1774c87aefeSPatrick Mooney #define SDT_MEMEA 25 /* memory execute only accessed */ 1784c87aefeSPatrick Mooney #define SDT_MEMER 26 /* memory execute read */ 1794c87aefeSPatrick Mooney #define SDT_MEMERA 27 /* memory execute read accessed */ 1804c87aefeSPatrick Mooney #define SDT_MEMEC 28 /* memory execute only conforming */ 1814c87aefeSPatrick Mooney #define SDT_MEMEAC 29 /* memory execute only accessed conforming */ 1824c87aefeSPatrick Mooney #define SDT_MEMERC 30 /* memory execute read conforming */ 1834c87aefeSPatrick Mooney #define SDT_MEMERAC 31 /* memory execute read accessed conforming */ 1844c87aefeSPatrick Mooney 1854c87aefeSPatrick Mooney /* 1864c87aefeSPatrick Mooney * Size of IDT table 1874c87aefeSPatrick Mooney */ 1884c87aefeSPatrick Mooney #define NIDT 256 /* 32 reserved, 0x80 syscall, most are h/w */ 1894c87aefeSPatrick Mooney #define NRSVIDT 32 /* reserved entries for cpu exceptions */ 1904c87aefeSPatrick Mooney 1914c87aefeSPatrick Mooney /* 1924c87aefeSPatrick Mooney * Entries in the Interrupt Descriptor Table (IDT) 1934c87aefeSPatrick Mooney */ 1944c87aefeSPatrick Mooney #define IDT_DE 0 /* #DE: Divide Error */ 1954c87aefeSPatrick Mooney #define IDT_DB 1 /* #DB: Debug */ 1964c87aefeSPatrick Mooney #define IDT_NMI 2 /* Nonmaskable External Interrupt */ 1974c87aefeSPatrick Mooney #define IDT_BP 3 /* #BP: Breakpoint */ 1984c87aefeSPatrick Mooney #define IDT_OF 4 /* #OF: Overflow */ 1994c87aefeSPatrick Mooney #define IDT_BR 5 /* #BR: Bound Range Exceeded */ 2004c87aefeSPatrick Mooney #define IDT_UD 6 /* #UD: Undefined/Invalid Opcode */ 2014c87aefeSPatrick Mooney #define IDT_NM 7 /* #NM: No Math Coprocessor */ 2024c87aefeSPatrick Mooney #define IDT_DF 8 /* #DF: Double Fault */ 2034c87aefeSPatrick Mooney #define IDT_FPUGP 9 /* Coprocessor Segment Overrun */ 2044c87aefeSPatrick Mooney #define IDT_TS 10 /* #TS: Invalid TSS */ 2054c87aefeSPatrick Mooney #define IDT_NP 11 /* #NP: Segment Not Present */ 2064c87aefeSPatrick Mooney #define IDT_SS 12 /* #SS: Stack Segment Fault */ 2074c87aefeSPatrick Mooney #define IDT_GP 13 /* #GP: General Protection Fault */ 2084c87aefeSPatrick Mooney #define IDT_PF 14 /* #PF: Page Fault */ 2094c87aefeSPatrick Mooney #define IDT_MF 16 /* #MF: FPU Floating-Point Error */ 2104c87aefeSPatrick Mooney #define IDT_AC 17 /* #AC: Alignment Check */ 2114c87aefeSPatrick Mooney #define IDT_MC 18 /* #MC: Machine Check */ 2124c87aefeSPatrick Mooney #define IDT_XF 19 /* #XF: SIMD Floating-Point Exception */ 2134c87aefeSPatrick Mooney #define IDT_IO_INTS NRSVIDT /* Base of IDT entries for I/O interrupts. */ 2144c87aefeSPatrick Mooney #define IDT_SYSCALL 0x80 /* System Call Interrupt Vector */ 2154c87aefeSPatrick Mooney #define IDT_DTRACE_RET 0x92 /* DTrace pid provider Interrupt Vector */ 2164c87aefeSPatrick Mooney #define IDT_EVTCHN 0x93 /* Xen HVM Event Channel Interrupt Vector */ 2174c87aefeSPatrick Mooney 2184c87aefeSPatrick Mooney #if defined(__i386__) 2194c87aefeSPatrick Mooney /* 2204c87aefeSPatrick Mooney * Entries in the Global Descriptor Table (GDT) 2214c87aefeSPatrick Mooney * Note that each 4 entries share a single 32 byte L1 cache line. 2224c87aefeSPatrick Mooney * Some of the fast syscall instructions require a specific order here. 2234c87aefeSPatrick Mooney */ 2244c87aefeSPatrick Mooney #define GNULL_SEL 0 /* Null Descriptor */ 2254c87aefeSPatrick Mooney #define GPRIV_SEL 1 /* SMP Per-Processor Private Data */ 2264c87aefeSPatrick Mooney #define GUFS_SEL 2 /* User %fs Descriptor (order critical: 1) */ 2274c87aefeSPatrick Mooney #define GUGS_SEL 3 /* User %gs Descriptor (order critical: 2) */ 2284c87aefeSPatrick Mooney #define GCODE_SEL 4 /* Kernel Code Descriptor (order critical: 1) */ 2294c87aefeSPatrick Mooney #define GDATA_SEL 5 /* Kernel Data Descriptor (order critical: 2) */ 2304c87aefeSPatrick Mooney #define GUCODE_SEL 6 /* User Code Descriptor (order critical: 3) */ 2314c87aefeSPatrick Mooney #define GUDATA_SEL 7 /* User Data Descriptor (order critical: 4) */ 2324c87aefeSPatrick Mooney #define GBIOSLOWMEM_SEL 8 /* BIOS low memory access (must be entry 8) */ 2334c87aefeSPatrick Mooney #define GPROC0_SEL 9 /* Task state process slot zero and up */ 2344c87aefeSPatrick Mooney #define GLDT_SEL 10 /* Default User LDT */ 2354c87aefeSPatrick Mooney #define GUSERLDT_SEL 11 /* User LDT */ 2364c87aefeSPatrick Mooney #define GPANIC_SEL 12 /* Task state to consider panic from */ 2374c87aefeSPatrick Mooney #define GBIOSCODE32_SEL 13 /* BIOS interface (32bit Code) */ 2384c87aefeSPatrick Mooney #define GBIOSCODE16_SEL 14 /* BIOS interface (16bit Code) */ 2394c87aefeSPatrick Mooney #define GBIOSDATA_SEL 15 /* BIOS interface (Data) */ 2404c87aefeSPatrick Mooney #define GBIOSUTIL_SEL 16 /* BIOS interface (Utility) */ 2414c87aefeSPatrick Mooney #define GBIOSARGS_SEL 17 /* BIOS interface (Arguments) */ 2424c87aefeSPatrick Mooney #define GNDIS_SEL 18 /* For the NDIS layer */ 2434c87aefeSPatrick Mooney #define NGDT 19 2444c87aefeSPatrick Mooney 2454c87aefeSPatrick Mooney /* 2464c87aefeSPatrick Mooney * Entries in the Local Descriptor Table (LDT) 2474c87aefeSPatrick Mooney */ 2484c87aefeSPatrick Mooney #define LSYS5CALLS_SEL 0 /* forced by intel BCS */ 2494c87aefeSPatrick Mooney #define LSYS5SIGR_SEL 1 2504c87aefeSPatrick Mooney #define LUCODE_SEL 3 2514c87aefeSPatrick Mooney #define LUDATA_SEL 5 2524c87aefeSPatrick Mooney #define NLDT (LUDATA_SEL + 1) 2534c87aefeSPatrick Mooney 2544c87aefeSPatrick Mooney #else /* !__i386__ */ 2554c87aefeSPatrick Mooney /* 2564c87aefeSPatrick Mooney * Entries in the Global Descriptor Table (GDT) 2574c87aefeSPatrick Mooney */ 2584c87aefeSPatrick Mooney #define GNULL_SEL 0 /* Null Descriptor */ 2594c87aefeSPatrick Mooney #define GNULL2_SEL 1 /* Null Descriptor */ 2604c87aefeSPatrick Mooney #define GUFS32_SEL 2 /* User 32 bit %fs Descriptor */ 2614c87aefeSPatrick Mooney #define GUGS32_SEL 3 /* User 32 bit %gs Descriptor */ 2624c87aefeSPatrick Mooney #define GCODE_SEL 4 /* Kernel Code Descriptor */ 2634c87aefeSPatrick Mooney #define GDATA_SEL 5 /* Kernel Data Descriptor */ 2644c87aefeSPatrick Mooney #define GUCODE32_SEL 6 /* User 32 bit code Descriptor */ 2654c87aefeSPatrick Mooney #define GUDATA_SEL 7 /* User 32/64 bit Data Descriptor */ 2664c87aefeSPatrick Mooney #define GUCODE_SEL 8 /* User 64 bit Code Descriptor */ 2674c87aefeSPatrick Mooney #define GPROC0_SEL 9 /* TSS for entering kernel etc */ 2684c87aefeSPatrick Mooney /* slot 10 is second half of GPROC0_SEL */ 2694c87aefeSPatrick Mooney #define GUSERLDT_SEL 11 /* LDT */ 2704c87aefeSPatrick Mooney /* slot 12 is second half of GUSERLDT_SEL */ 2714c87aefeSPatrick Mooney #define NGDT 13 2724c87aefeSPatrick Mooney #endif /* __i386__ */ 2734c87aefeSPatrick Mooney 2744c87aefeSPatrick Mooney #endif /* !_X86_SEGMENTS_H_ */ 275