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134 lines
4.5 KiB
C
134 lines
4.5 KiB
C
/*
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* Copyright (c) 2000-2009 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* @OSF_COPYRIGHT@
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*/
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/*
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* Mach Operating System
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* Copyright (c) 1991,1990 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*/
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/*
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*/
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#ifndef _I386_MP_DESC_H_
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#define _I386_MP_DESC_H_
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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/*
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* Multiprocessor i386/i486 systems use a separate copy of the
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* GDT, IDT, LDT, and kernel TSS per processor. The first three
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* are separate to avoid lock contention: the i386 uses locked
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* memory cycles to access the descriptor tables. The TSS is
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* separate since each processor needs its own kernel stack,
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* and since using a TSS marks it busy.
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*/
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#include <i386/seg.h>
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#include <i386/tss.h>
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/*
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* The descriptor tables are together in a structure
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* allocated one per processor (except for the boot processor).
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*/
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#define FSTK_SZ (PAGE_SIZE/2)
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typedef struct cpu_desc_table64 {
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struct fake_descriptor gdt[GDTSZ] __attribute__ ((aligned(16)));
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struct x86_64_tss ktss __attribute__ ((aligned(16)));
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struct sysenter_stack sstk __attribute__ ((aligned(16)));
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uint8_t *fstkp;
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} cpu_desc_table64_t;
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typedef struct {
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uint8_t fstk[FSTK_SZ] __attribute__ ((aligned(16)));
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} cpu_fault_stack_t;
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#define current_gdt() (current_cpu_datap()->cpu_desc_index.cdi_gdtb.ptr)
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#define current_idt() (current_cpu_datap()->cpu_desc_index.cdi_idtb.ptr)
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#define current_ldt() (current_cpu_datap()->cpu_desc_index.cdi_ldtb)
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#define current_ktss() (current_cpu_datap()->cpu_desc_index.cdi_ktssb)
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#define current_sstk() (current_cpu_datap()->cpu_desc_index.cdi_sstkb)
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#define current_ktss64() ((struct x86_64_tss *) current_ktss())
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#define current_sstk64() ((addr64_t *) current_sstk())
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#define gdt_desc_p(sel) \
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(&((struct real_descriptor *)current_gdt())[sel_idx(sel)])
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#define ldt_desc_p(sel) \
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(¤t_ldt()[sel_idx(sel)])
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extern void cpu_syscall_init(cpu_data_t *cdp);
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extern void cpu_desc_init(cpu_data_t *cdp);
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extern void cpu_desc_load(cpu_data_t *cdp);
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extern boolean_t
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valid_user_data_selector(uint16_t selector);
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extern boolean_t
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valid_user_code_selector(uint16_t selector);
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extern boolean_t
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valid_user_stack_selector(uint16_t selector);
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extern boolean_t
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valid_user_segment_selectors(uint16_t cs,
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uint16_t ss,
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uint16_t ds,
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uint16_t es,
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uint16_t fs,
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uint16_t gs);
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__END_DECLS
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#endif /* _X86_64_MP_DESC_H_ */
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