Source to osfmk/i386/AT386/mp/mp.h
/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* The contents of this file constitute Original Code as defined in and
* are subject to the Apple Public Source License Version 1.1 (the
* "License"). You may not use this file except in compliance with the
* License. Please obtain a copy of the License at
* http://www.apple.com/publicsource and read it before using this file.
*
* This Original Code and all software distributed under the License are
* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
* License for the specific language governing rights and limitations
* under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*/
/*
* Mach Operating System
* Copyright (c) 1991,1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or [email protected]
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
*/
#ifndef _I386AT_MP_H_
#define _I386AT_MP_H_
#include <cpus.h>
#include <platforms.h>
#include <mp_v1_1.h>
#include <mach_rt.h>
#include <mach_assert.h>
#if NCPUS > 1
#include <i386/apic.h>
#include <i386/AT386/mp/mp_events.h>
#define CPU_NUMBER(r) \
movl EXT(lapic_id), r ; \
movl 0(r),r ; \
shrl $LAPIC_ID_SHIFT, r; \
andl $LAPIC_ID_MASK, r
#define MP_IPL SPL6 /* software interrupt level */
/* word describing the reason for the interrupt, one per cpu */
#ifndef ASSEMBLER
#include <kern/lock.h>
extern cpu_int_word[];
extern real_ncpus; /* real number of cpus */
extern wncpu; /* wanted number of cpus */
decl_simple_lock_data(extern,kdb_lock) /* kdb lock */
extern int kdb_cpu; /* current cpu running kdb */
extern int kdb_debug;
extern int kdb_is_slave[];
extern int kdb_active[];
#endif /* ASSEMBLER */
#define i_bit(bit, word) ((long)(*(word)) & ((long)1 << (bit)))
/*
* Device driver synchronization.
*
* at386_io_lock(op) and at386_io_unlock() are called
* by device drivers when accessing H/W. The underlying
* Processing is machine dependant. But the op argument
* to the at386_io_lock is generic
*/
#define MP_DEV_OP_MAX 4
#define MP_DEV_WAIT MP_DEV_OP_MAX /* Wait for the lock */
/*
* If the caller specifies an op value different than MP_DEV_WAIT, the
* at386_io_lock function must return true if lock was successful else
* false
*/
#define MP_DEV_OP_START 0 /* If lock busy, register a pending start op */
#define MP_DEV_OP_INTR 1 /* If lock busy, register a pending intr */
#define MP_DEV_OP_TIMEO 2 /* If lock busy, register a pending timeout */
#define MP_DEV_OP_CALLB 3 /* If lock busy, register a pending callback */
#else /* NCPUS > 1 */
#define at386_io_lock_state()
#define at386_io_lock(op) (TRUE)
#define at386_io_unlock()
#if MP_V1_1
#include <i386/apic.h>
#endif /* MP_V1_1 */
#endif /* NCPUS > 1 */
#if MACH_RT
#define _DISABLE_PREEMPTION(r) \
movl $CPD_PREEMPTION_LEVEL,r ; \
incl %gs:(r)
#define _ENABLE_PREEMPTION(r) \
movl $CPD_PREEMPTION_LEVEL,r ; \
decl %gs:(r) ; \
jne 9f ; \
pushl %eax ; \
pushl %ecx ; \
pushl %edx ; \
call EXT(kernel_preempt_check) ; \
popl %edx ; \
popl %ecx ; \
popl %eax ; \
9:
#define _ENABLE_PREEMPTION_NO_CHECK(r) \
movl $CPD_PREEMPTION_LEVEL,r ; \
decl %gs:(r)
#if MACH_ASSERT
#define DISABLE_PREEMPTION(r) \
pushl %eax; \
pushl %ecx; \
pushl %edx; \
call EXT(_disable_preemption); \
popl %edx; \
popl %ecx; \
popl %eax
#define ENABLE_PREEMPTION(r) \
pushl %eax; \
pushl %ecx; \
pushl %edx; \
call EXT(_enable_preemption); \
popl %edx; \
popl %ecx; \
popl %eax
#define ENABLE_PREEMPTION_NO_CHECK(r) \
pushl %eax; \
pushl %ecx; \
pushl %edx; \
call EXT(_enable_preemption_no_check); \
popl %edx; \
popl %ecx; \
popl %eax
#if NCPUS > 1
#define MP_DISABLE_PREEMPTION(r) \
pushl %eax; \
pushl %ecx; \
pushl %edx; \
call EXT(_mp_disable_preemption); \
popl %edx; \
popl %ecx; \
popl %eax
#define MP_ENABLE_PREEMPTION(r) \
pushl %eax; \
pushl %ecx; \
pushl %edx; \
call EXT(_mp_enable_preemption); \
popl %edx; \
popl %ecx; \
popl %eax
#define MP_ENABLE_PREEMPTION_NO_CHECK(r) \
pushl %eax; \
pushl %ecx; \
pushl %edx; \
call EXT(_mp_enable_preemption_no_check); \
popl %edx; \
popl %ecx; \
popl %eax
#else /* NCPUS > 1 */
#define MP_DISABLE_PREEMPTION(r)
#define MP_ENABLE_PREEMPTION(r)
#define MP_ENABLE_PREEMPTION_NO_CHECK(r)
#endif /* NCPUS > 1 */
#else /* MACH_ASSERT */
#define DISABLE_PREEMPTION(r) _DISABLE_PREEMPTION(r)
#define ENABLE_PREEMPTION(r) _ENABLE_PREEMPTION(r)
#define ENABLE_PREEMPTION_NO_CHECK(r) _ENABLE_PREEMPTION_NO_CHECK(r)
#if NCPUS > 1
#define MP_DISABLE_PREEMPTION(r) _DISABLE_PREEMPTION(r)
#define MP_ENABLE_PREEMPTION(r) _ENABLE_PREEMPTION(r)
#define MP_ENABLE_PREEMPTION_NO_CHECK(r) _ENABLE_PREEMPTION_NO_CHECK(r)
#else /* NCPUS > 1 */
#define MP_DISABLE_PREEMPTION(r)
#define MP_ENABLE_PREEMPTION(r)
#define MP_ENABLE_PREEMPTION_NO_CHECK(r)
#endif /* NCPUS > 1 */
#endif /* MACH_ASSERT */
#else /* MACH_RT */
#define DISABLE_PREEMPTION(r)
#define ENABLE_PREEMPTION(r)
#define ENABLE_PREEMPTION_NO_CHECK(r)
#define MP_DISABLE_PREEMPTION(r)
#define MP_ENABLE_PREEMPTION(r)
#define MP_ENABLE_PREEMPTION_NO_CHECK(r)
#endif /* MACH_RT */
#endif /* _I386AT_MP_H_ */