Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/osfmk/ppc/aligned_data.s
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1 /* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. 7 * 8 * This file contains Original Code and/or Modifications of Original Code 9 * as defined in and that are subject to the Apple Public Source License 10 * Version 2.0 (the 'License'). You may not use this file except in 11 * compliance with the License. Please obtain a copy of the License at 12 * http://www.opensource.apple.com/apsl/ and read it before using this 13 * file. 14 * 15 * The Original Code and all software distributed under the License are 16 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 17 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 18 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 20 * Please see the License for the specific language governing rights and 21 * limitations under the License. 22 * 23 * @APPLE_LICENSE_HEADER_END@ 24 */ 25 /* 26 * This module only exists because I don't know how to get the silly C compiler 27 * and/or linker to generate data areas that are aligned on a particular boundary. 28 * And, this stuff is in the V=R mapped area. 29 * 30 * Do the following for each: 31 * 32 * .size name,size-in-bytes 33 * .type area-name,@object 34 * .globl area-name 35 * .align power-of-two 36 * area-name: 37 * .set .,.+size-in-bytes 38 * 39 * So long as I'm being pedantic, always make sure that the most aligned, 40 * i.e., the largest power-of-twos, are first and then descend to the smallest. 41 * If you don't, and you are not careful and hand calculate, you'll end up 42 * with holes and waste storage. I hate C. 43 * 44 * Define the sizes in genassym.c 45 */ 46 47 48 #include <debug.h> 49 #include <cpus.h> 50 #include <ppc/asm.h> 51 #include <ppc/proc_reg.h> 52 #include <ppc/spec_reg.h> 53 #include <mach/ppc/vm_param.h> 54 #include <assym.s> 55 56 ; 57 ; NOTE: We need this only if PREEMPTSTACK is set to non-zero in hw_lock. 58 ; Make sure they are set to the same thing 59 ; 60 #define PREEMPTSTACK 0 61 62 .data 63 64 /* 4096-byte aligned areas */ 65 66 .globl EXT(per_proc_info) 67 .align 12 68 EXT(per_proc_info): ; Per processor data area 69 .space (ppSize*NCPUS),0 ; (filled with 0s) 70 71 /* 512-byte aligned areas */ 72 73 .globl EXT(kernel_pmap_store) ; This is the kernel_pmap 74 .align 8 75 EXT(kernel_pmap_store): 76 .set .,.+pmapSize 77 78 79 /* 256-byte aligned areas */ 80 81 .globl EXT(GratefulDebWork) 82 .align 8 83 EXT(GratefulDebWork): ; Enough for 2 rows of 8 chars of 16-pixel wide 32-bit pixels and a 256 byte work area 84 .set .,.+2560 85 86 .globl debstash 87 .align 8 88 debstash: 89 .set .,.+256 90 91 #if PREEMPTSTACK 92 93 ; 94 ; NOTE: We need this only if PREEMPTSTACK is set to non-zero in hw_lock. 95 ; 96 97 .globl EXT(DBGpreempt) ; preemption debug stack 98 .align 8 99 EXT(DBGpreempt): 100 .set .,.+(NCPUS*PREEMPTSTACK*16) 101 #endif 102 103 104 /* 128-byte aligned areas */ 105 106 .globl EXT(mapCtl) 107 .align 7 108 EXT(mapCtl): 109 .set .,.+mapcsize 110 111 .globl fwdisplock 112 .align 7 113 fwdisplock: 114 .set .,.+128 115 116 .globl EXT(free_mappings) 117 .align 7 118 119 EXT(free_mappings): 120 .long 0 121 122 .globl EXT(syncClkSpot) 123 .align 7 124 EXT(syncClkSpot): 125 .long 0 126 .long 0 127 .long 0 128 .long 0 129 .long 0 130 .long 0 131 .long 0 132 .long 0 133 134 .globl EXT(NMIss) 135 .align 7 136 EXT(NMIss): 137 .long 0 138 .long 0 139 .long 0 140 .long 0 141 .long 0 142 .long 0 143 .long 0 144 .long 0 145 146 /* 32-byte aligned areas */ 147 148 .globl EXT(dbvecs) 149 .align 5 150 EXT(dbvecs): 151 .set .,.+(33*16) 152 153 .globl hexfont 154 .align 5 155 #include <ppc/hexfont.h> 156 157 .globl EXT(QNaNbarbarian) 158 .align 5 159 160 EXT(QNaNbarbarian): 161 .long 0x7FFFDEAD /* This is a quiet not-a-number which is a "known" debug value */ 162 .long 0x7FFFDEAD /* This is a quiet not-a-number which is a "known" debug value */ 163 .long 0x7FFFDEAD /* This is a quiet not-a-number which is a "known" debug value */ 164 .long 0x7FFFDEAD /* This is a quiet not-a-number which is a "known" debug value */ 165 166 .long 0x7FFFDEAD /* This is a quiet not-a-number which is a "known" debug value */ 167 .long 0x7FFFDEAD /* This is a quiet not-a-number which is a "known" debug value */ 168 .long 0x7FFFDEAD /* This is a quiet not-a-number which is a "known" debug value */ 169 .long 0x7FFFDEAD /* This is a quiet not-a-number which is a "known" debug value */ 170 171 /* 8-byte aligned areas */ 172 173 .globl EXT(FloatInit) 174 .align 3 175 176 EXT(FloatInit): 177 .long 0xC24BC195 /* Initial value */ 178 .long 0x87859393 /* of floating point registers */ 179 .long 0xE681A2C8 /* and others */ 180 .long 0x8599855A 181 182 .globl EXT(DebugWork) 183 .align 3 184 185 EXT(DebugWork): 186 .long 0 187 .long 0 188 .long 0 189 .long 0 190 191 .globl EXT(dbfloats) 192 .align 3 193 EXT(dbfloats): 194 .set .,.+(33*8) 195 196 .globl EXT(dbspecrs) 197 .align 3 198 EXT(dbspecrs): 199 .set .,.+(80*4) 200 201 /* 202 * Interrupt and debug stacks go here 203 */ 204 205 .align PPC_PGSHIFT 206 .globl EXT(FixedStackStart) 207 EXT(FixedStackStart): 208 209 .globl EXT(intstack) 210 EXT(intstack): 211 .set .,.+INTSTACK_SIZE*NCPUS 212 213 /* Debugger stack - used by the debugger if present */ 214 /* NOTE!!! Keep the debugger stack right after the interrupt stack */ 215 216 .globl EXT(debstack) 217 EXT(debstack): 218 .set ., .+KERNEL_STACK_SIZE*NCPUS 219 220 .globl EXT(FixedStackEnd) 221 EXT(FixedStackEnd): 222 223 .align ALIGN 224 .globl EXT(intstack_top_ss) 225 EXT(intstack_top_ss): 226 .long EXT(intstack)+INTSTACK_SIZE-FM_SIZE /* intstack_top_ss points to the top of interrupt stack */ 227 228 .align ALIGN 229 .globl EXT(debstack_top_ss) 230 EXT(debstack_top_ss): 231 232 .long EXT(debstack)+KERNEL_STACK_SIZE-FM_SIZE /* debstack_top_ss points to the top of debug stack */ 233 234 .globl EXT(debstackptr) 235 EXT(debstackptr): 236 .long EXT(debstack)+KERNEL_STACK_SIZE-FM_SIZE 237
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