bcde3b9f67
segments.h to a new x86 segments.h. Add __packed attribute to some structs (just to be sure). Also make it clear that i386 GDT and LDT entries are used in ia64 code.
107 lines
4.1 KiB
C
107 lines
4.1 KiB
C
/*-
|
|
* Copyright (c) 1989, 1990 William F. Jolitz
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* William Jolitz.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* from: @(#)segments.h 7.1 (Berkeley) 5/9/91
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _MACHINE_SEGMENTS_H_
|
|
#define _MACHINE_SEGMENTS_H_
|
|
|
|
/*
|
|
* AMD64 Segmentation Data Structures and definitions
|
|
*/
|
|
|
|
#include <x86/segments.h>
|
|
|
|
/*
|
|
* System segment descriptors (128 bit wide)
|
|
*/
|
|
struct system_segment_descriptor {
|
|
u_int64_t sd_lolimit:16; /* segment extent (lsb) */
|
|
u_int64_t sd_lobase:24; /* segment base address (lsb) */
|
|
u_int64_t sd_type:5; /* segment type */
|
|
u_int64_t sd_dpl:2; /* segment descriptor priority level */
|
|
u_int64_t sd_p:1; /* segment descriptor present */
|
|
u_int64_t sd_hilimit:4; /* segment extent (msb) */
|
|
u_int64_t sd_xx0:3; /* unused */
|
|
u_int64_t sd_gran:1; /* limit granularity (byte/page units)*/
|
|
u_int64_t sd_hibase:40 __packed;/* segment base address (msb) */
|
|
u_int64_t sd_xx1:8;
|
|
u_int64_t sd_mbz:5; /* MUST be zero */
|
|
u_int64_t sd_xx2:19;
|
|
} __packed;
|
|
|
|
/*
|
|
* Software definitions are in this convenient format,
|
|
* which are translated into inconvenient segment descriptors
|
|
* when needed to be used by the 386 hardware
|
|
*/
|
|
|
|
struct soft_segment_descriptor {
|
|
unsigned long ssd_base; /* segment base address */
|
|
unsigned long ssd_limit; /* segment extent */
|
|
unsigned long ssd_type:5; /* segment type */
|
|
unsigned long ssd_dpl:2; /* segment descriptor priority level */
|
|
unsigned long ssd_p:1; /* segment descriptor present */
|
|
unsigned long ssd_long:1; /* long mode (for %cs) */
|
|
unsigned long ssd_def32:1; /* default 32 vs 16 bit size */
|
|
unsigned long ssd_gran:1; /* limit granularity (byte/page units)*/
|
|
} __packed;
|
|
|
|
/*
|
|
* region descriptors, used to load gdt/idt tables before segments yet exist.
|
|
*/
|
|
struct region_descriptor {
|
|
unsigned long rd_limit:16; /* segment extent */
|
|
unsigned long rd_base:64 __packed; /* base address */
|
|
} __packed;
|
|
|
|
#ifdef _KERNEL
|
|
extern struct user_segment_descriptor gdt[];
|
|
extern struct soft_segment_descriptor gdt_segs[];
|
|
extern struct gate_descriptor *idt;
|
|
extern struct region_descriptor r_gdt, r_idt;
|
|
|
|
void lgdt(struct region_descriptor *rdp);
|
|
void sdtossd(struct user_segment_descriptor *sdp,
|
|
struct soft_segment_descriptor *ssdp);
|
|
void ssdtosd(struct soft_segment_descriptor *ssdp,
|
|
struct user_segment_descriptor *sdp);
|
|
void ssdtosyssd(struct soft_segment_descriptor *ssdp,
|
|
struct system_segment_descriptor *sdp);
|
|
void update_gdt_gsbase(struct thread *td, uint32_t base);
|
|
void update_gdt_fsbase(struct thread *td, uint32_t base);
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* !_MACHINE_SEGMENTS_H_ */
|