| | 1 | /* |
| | 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * The contents of this file constitute Original Code as defined in and |
| | 7 | * are subject to the Apple Public Source License Version 1.1 (the |
| | 8 | * "License"). You may not use this file except in compliance with the |
| | 9 | * License. Please obtain a copy of the License at |
| | 10 | * http://www.apple.com/publicsource and read it before using this file. |
| | 11 | * |
| | 12 | * This Original Code and all software distributed under the License are |
| | 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| | 17 | * License for the specific language governing rights and limitations |
| | 18 | * under the License. |
| | 19 | * |
| | 20 | * @APPLE_LICENSE_HEADER_END@ |
| | 21 | */ |
| | 22 | /* |
| | 23 | * @OSF_COPYRIGHT@ |
| | 24 | */ |
| | 25 | /* |
| | 26 | * Mach Operating System |
| | 27 | * Copyright (c) 1991,1990 Carnegie Mellon University |
| | 28 | * All Rights Reserved. |
| | 29 | * |
| | 30 | * Permission to use, copy, modify and distribute this software and its |
| | 31 | * documentation is hereby granted, provided that both the copyright |
| | 32 | * notice and this permission notice appear in all copies of the |
| | 33 | * software, derivative works or modified versions, and any portions |
| | 34 | * thereof, and that both notices appear in supporting documentation. |
| | 35 | * |
| | 36 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" |
| | 37 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR |
| | 38 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. |
| | 39 | * |
| | 40 | * Carnegie Mellon requests users of this software to return to |
| | 41 | * |
| | 42 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU |
| | 43 | * School of Computer Science |
| | 44 | * Carnegie Mellon University |
| | 45 | * Pittsburgh PA 15213-3890 |
| | 46 | * |
| | 47 | * any improvements or extensions that they make and grant Carnegie Mellon |
| | 48 | * the rights to redistribute these changes. |
| | 49 | */ |
| | 50 | |
| | 51 | /* |
| | 52 | */ |
| | 53 | |
| | 54 | #ifndef _I386AT_MP_H_ |
| | 55 | #define _I386AT_MP_H_ |
| | 56 | |
| | 57 | #include <cpus.h> |
| | 58 | #include <platforms.h> |
| | 59 | #include <mp_v1_1.h> |
| | 60 | #include <mach_rt.h> |
| | 61 | #include <mach_assert.h> |
| | 62 | |
| | 63 | #if NCPUS > 1 |
| | 64 | #include <i386/apic.h> |
| | 65 | #include <i386/AT386/mp/mp_events.h> |
| | 66 | |
| | 67 | #define CPU_NUMBER(r) \ |
| | 68 | movl EXT(lapic_id), r ; \ |
| | 69 | movl 0(r),r ; \ |
| | 70 | shrl $LAPIC_ID_SHIFT, r; \ |
| | 71 | andl $LAPIC_ID_MASK, r |
| | 72 | |
| | 73 | |
| | 74 | #define MP_IPL SPL6 /* software interrupt level */ |
| | 75 | |
| | 76 | /* word describing the reason for the interrupt, one per cpu */ |
| | 77 | |
| | 78 | #ifndef ASSEMBLER |
| | 79 | #include <kern/lock.h> |
| | 80 | extern cpu_int_word[]; |
| | 81 | extern real_ncpus; /* real number of cpus */ |
| | 82 | extern wncpu; /* wanted number of cpus */ |
| | 83 | decl_simple_lock_data(extern,kdb_lock) /* kdb lock */ |
| | 84 | |
| | 85 | extern int kdb_cpu; /* current cpu running kdb */ |
| | 86 | extern int kdb_debug; |
| | 87 | extern int kdb_is_slave[]; |
| | 88 | extern int kdb_active[]; |
| | 89 | #endif /* ASSEMBLER */ |
| | 90 | |
| | 91 | #define i_bit(bit, word) ((long)(*(word)) & ((long)1 << (bit))) |
| | 92 | |
| | 93 | |
| | 94 | /* |
| | 95 | * Device driver synchronization. |
| | 96 | * |
| | 97 | * at386_io_lock(op) and at386_io_unlock() are called |
| | 98 | * by device drivers when accessing H/W. The underlying |
| | 99 | * Processing is machine dependant. But the op argument |
| | 100 | * to the at386_io_lock is generic |
| | 101 | */ |
| | 102 | |
| | 103 | #define MP_DEV_OP_MAX 4 |
| | 104 | #define MP_DEV_WAIT MP_DEV_OP_MAX /* Wait for the lock */ |
| | 105 | |
| | 106 | /* |
| | 107 | * If the caller specifies an op value different than MP_DEV_WAIT, the |
| | 108 | * at386_io_lock function must return true if lock was successful else |
| | 109 | * false |
| | 110 | */ |
| | 111 | |
| | 112 | #define MP_DEV_OP_START 0 /* If lock busy, register a pending start op */ |
| | 113 | #define MP_DEV_OP_INTR 1 /* If lock busy, register a pending intr */ |
| | 114 | #define MP_DEV_OP_TIMEO 2 /* If lock busy, register a pending timeout */ |
| | 115 | #define MP_DEV_OP_CALLB 3 /* If lock busy, register a pending callback */ |
| | 116 | |
| | 117 | #else /* NCPUS > 1 */ |
| | 118 | #define at386_io_lock_state() |
| | 119 | #define at386_io_lock(op) (TRUE) |
| | 120 | #define at386_io_unlock() |
| | 121 | #if MP_V1_1 |
| | 122 | #include <i386/apic.h> |
| | 123 | #endif /* MP_V1_1 */ |
| | 124 | #endif /* NCPUS > 1 */ |
| | 125 | |
| | 126 | #if MACH_RT |
| | 127 | #define _DISABLE_PREEMPTION(r) \ |
| | 128 | movl $CPD_PREEMPTION_LEVEL,r ; \ |
| | 129 | incl %gs:(r) |
| | 130 | |
| | 131 | #define _ENABLE_PREEMPTION(r) \ |
| | 132 | movl $CPD_PREEMPTION_LEVEL,r ; \ |
| | 133 | decl %gs:(r) ; \ |
| | 134 | jne 9f ; \ |
| | 135 | pushl %eax ; \ |
| | 136 | pushl %ecx ; \ |
| | 137 | pushl %edx ; \ |
| | 138 | call EXT(kernel_preempt_check) ; \ |
| | 139 | popl %edx ; \ |
| | 140 | popl %ecx ; \ |
| | 141 | popl %eax ; \ |
| | 142 | 9: |
| | 143 | |
| | 144 | #define _ENABLE_PREEMPTION_NO_CHECK(r) \ |
| | 145 | movl $CPD_PREEMPTION_LEVEL,r ; \ |
| | 146 | decl %gs:(r) |
| | 147 | |
| | 148 | #if MACH_ASSERT |
| | 149 | #define DISABLE_PREEMPTION(r) \ |
| | 150 | pushl %eax; \ |
| | 151 | pushl %ecx; \ |
| | 152 | pushl %edx; \ |
| | 153 | call EXT(_disable_preemption); \ |
| | 154 | popl %edx; \ |
| | 155 | popl %ecx; \ |
| | 156 | popl %eax |
| | 157 | #define ENABLE_PREEMPTION(r) \ |
| | 158 | pushl %eax; \ |
| | 159 | pushl %ecx; \ |
| | 160 | pushl %edx; \ |
| | 161 | call EXT(_enable_preemption); \ |
| | 162 | popl %edx; \ |
| | 163 | popl %ecx; \ |
| | 164 | popl %eax |
| | 165 | #define ENABLE_PREEMPTION_NO_CHECK(r) \ |
| | 166 | pushl %eax; \ |
| | 167 | pushl %ecx; \ |
| | 168 | pushl %edx; \ |
| | 169 | call EXT(_enable_preemption_no_check); \ |
| | 170 | popl %edx; \ |
| | 171 | popl %ecx; \ |
| | 172 | popl %eax |
| | 173 | #if NCPUS > 1 |
| | 174 | #define MP_DISABLE_PREEMPTION(r) \ |
| | 175 | pushl %eax; \ |
| | 176 | pushl %ecx; \ |
| | 177 | pushl %edx; \ |
| | 178 | call EXT(_mp_disable_preemption); \ |
| | 179 | popl %edx; \ |
| | 180 | popl %ecx; \ |
| | 181 | popl %eax |
| | 182 | #define MP_ENABLE_PREEMPTION(r) \ |
| | 183 | pushl %eax; \ |
| | 184 | pushl %ecx; \ |
| | 185 | pushl %edx; \ |
| | 186 | call EXT(_mp_enable_preemption); \ |
| | 187 | popl %edx; \ |
| | 188 | popl %ecx; \ |
| | 189 | popl %eax |
| | 190 | #define MP_ENABLE_PREEMPTION_NO_CHECK(r) \ |
| | 191 | pushl %eax; \ |
| | 192 | pushl %ecx; \ |
| | 193 | pushl %edx; \ |
| | 194 | call EXT(_mp_enable_preemption_no_check); \ |
| | 195 | popl %edx; \ |
| | 196 | popl %ecx; \ |
| | 197 | popl %eax |
| | 198 | #else /* NCPUS > 1 */ |
| | 199 | #define MP_DISABLE_PREEMPTION(r) |
| | 200 | #define MP_ENABLE_PREEMPTION(r) |
| | 201 | #define MP_ENABLE_PREEMPTION_NO_CHECK(r) |
| | 202 | #endif /* NCPUS > 1 */ |
| | 203 | #else /* MACH_ASSERT */ |
| | 204 | #define DISABLE_PREEMPTION(r) _DISABLE_PREEMPTION(r) |
| | 205 | #define ENABLE_PREEMPTION(r) _ENABLE_PREEMPTION(r) |
| | 206 | #define ENABLE_PREEMPTION_NO_CHECK(r) _ENABLE_PREEMPTION_NO_CHECK(r) |
| | 207 | #if NCPUS > 1 |
| | 208 | #define MP_DISABLE_PREEMPTION(r) _DISABLE_PREEMPTION(r) |
| | 209 | #define MP_ENABLE_PREEMPTION(r) _ENABLE_PREEMPTION(r) |
| | 210 | #define MP_ENABLE_PREEMPTION_NO_CHECK(r) _ENABLE_PREEMPTION_NO_CHECK(r) |
| | 211 | #else /* NCPUS > 1 */ |
| | 212 | #define MP_DISABLE_PREEMPTION(r) |
| | 213 | #define MP_ENABLE_PREEMPTION(r) |
| | 214 | #define MP_ENABLE_PREEMPTION_NO_CHECK(r) |
| | 215 | #endif /* NCPUS > 1 */ |
| | 216 | #endif /* MACH_ASSERT */ |
| | 217 | |
| | 218 | #else /* MACH_RT */ |
| | 219 | #define DISABLE_PREEMPTION(r) |
| | 220 | #define ENABLE_PREEMPTION(r) |
| | 221 | #define ENABLE_PREEMPTION_NO_CHECK(r) |
| | 222 | #define MP_DISABLE_PREEMPTION(r) |
| | 223 | #define MP_ENABLE_PREEMPTION(r) |
| | 224 | #define MP_ENABLE_PREEMPTION_NO_CHECK(r) |
| | 225 | #endif /* MACH_RT */ |
| | 226 | |
| | 227 | #endif /* _I386AT_MP_H_ */ |
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