osfmk/ppc/aligned_data.s

   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  *              This module only exists because I don't know how to get the silly C compiler
  24  *              and/or linker to generate data areas that are aligned on a particular boundary.
  25  *              And, this stuff is in the V=R mapped area.
  26  *
  27  *              Do the following for each:
  28  *
  29  *                              .size   name,size-in-bytes
  30  *                              .type   area-name,@object
  31  *                              .globl  area-name
  32  *                              .align  power-of-two
  33  *              area-name:
  34  *                              .set    .,.+size-in-bytes
  35  *
  36  *              So long as I'm being pedantic, always make sure that the most aligned,
  37  *              i.e., the largest power-of-twos, are first and then descend to the smallest.
  38  *              If you don't, and you are not careful and hand calculate, you'll end up
  39  *              with holes and waste storage.  I hate C.
  40  *
  41  *              Define the sizes in genassym.c
  42  */
  43
  44
  45 #include <debug.h>
  46 #include <ppc/asm.h>
  47 #include <ppc/proc_reg.h>
  48 #include <ppc/spec_reg.h>
  49 #include <mach/ppc/vm_param.h>
  50 #include <assym.s>
  51
  52                         .data
  53
  54 /*              4096-byte aligned areas */
  55
  56                 .globl  EXT(PerProcTable)
  57                 .align  12
  58 EXT(PerProcTable):                                                                      ; Per processor table
  59                 .space  (ppeSize*MAX_CPUS),0                            ; (filled with 0s)
  60
  61                 .globl  EXT(BootProcInfo)
  62                 .align  12
  63 EXT(BootProcInfo):                                                                      ; Per processor data area
  64                 .space  ppSize,0                                                        ; (filled with 0s)
  65
  66 /*              512-byte aligned areas */
  67
  68                 .globl  EXT(kernel_pmap_store)                          ; This is the kernel_pmap
  69                 .align  8
  70 EXT(kernel_pmap_store):
  71                 .set    .,.+pmapSize
  72
  73
  74 /*              256-byte aligned areas */
  75
  76                 .globl  EXT(GratefulDebWork)
  77                 .align  8
  78 EXT(GratefulDebWork):                                                           ; Enough for 2 rows of 8 chars of 16-pixel wide 32-bit pixels and a 256 byte work area
  79                 .set    .,.+2560
  80
  81                 .globl  debstash
  82                 .align  8
  83 debstash:
  84                 .set    .,.+256
  85
  86 /*              128-byte aligned areas */
  87
  88                 .globl  EXT(mapCtl)
  89                 .align  7
  90 EXT(mapCtl):
  91                 .set    .,.+mapcsize
  92
  93                 .globl  fwdisplock
  94                 .align  7
  95 fwdisplock:
  96                 .set    .,.+128
  97
  98                 .globl  EXT(free_mappings)
  99                 .align  7
 100
 101 EXT(free_mappings):
 102                 .long   0
 103
 104                 .globl  EXT(NMIss)
 105                 .align  7
 106 EXT(NMIss):
 107                 .long   0
 108                 .long   0
 109                 .long   0
 110                 .long   0
 111                 .long   0
 112                 .long   0
 113                 .long   0
 114                 .long   0
 115
 116 /*              32-byte aligned areas */
 117
 118                 .globl  EXT(dbvecs)
 119                 .align  5
 120 EXT(dbvecs):
 121                 .set    .,.+(33*16)
 122
 123                 .globl  hexfont
 124                 .align  5
 125 #include <ppc/hexfont.h>
 126
 127         .globl  EXT(QNaNbarbarian)
 128                 .align  5
 129
 130 EXT(QNaNbarbarian):
 131                 .long   0x7FFFDEAD                                                      /* This is a quiet not-a-number which is a "known" debug value */
 132                 .long   0x7FFFDEAD                                                      /* This is a quiet not-a-number which is a "known" debug value */
 133                 .long   0x7FFFDEAD                                                      /* This is a quiet not-a-number which is a "known" debug value */
 134                 .long   0x7FFFDEAD                                                      /* This is a quiet not-a-number which is a "known" debug value */
 135
 136                 .long   0x7FFFDEAD                                                      /* This is a quiet not-a-number which is a "known" debug value */
 137                 .long   0x7FFFDEAD                                                      /* This is a quiet not-a-number which is a "known" debug value */
 138                 .long   0x7FFFDEAD                                                      /* This is a quiet not-a-number which is a "known" debug value */
 139                 .long   0x7FFFDEAD                                                      /* This is a quiet not-a-number which is a "known" debug value */
 140
 141 /*              8-byte aligned areas */
 142
 143         .globl  EXT(FloatInit)
 144                 .align  3
 145
 146 EXT(FloatInit):
 147                 .long   0xC24BC195                                                      /* Initial value */
 148                 .long   0x87859393                                                      /* of floating point registers */
 149                 .long   0xE681A2C8                                                      /* and others */
 150                 .long   0x8599855A
 151
 152                 .globl  EXT(DebugWork)
 153                 .align  3
 154
 155 EXT(DebugWork):
 156                 .long   0
 157                 .long   0
 158                 .long   0
 159                 .long   0
 160
 161         .globl  EXT(dbfloats)
 162                 .align  3
 163 EXT(dbfloats):
 164                 .set    .,.+(33*8)
 165
 166                 .globl  EXT(dbspecrs)
 167                 .align  3
 168 EXT(dbspecrs):
 169                 .set    .,.+(336*4)
 170
 171 /*
 172  *              Boot processor Interrupt and debug stacks go here.
 173  */
 174
 175                 .section __HIB, __data
 176
 177                 .align  PPC_PGSHIFT
 178
 179                 .globl  EXT(intstack)
 180 EXT(intstack):
 181
 182                 .set    .,.+INTSTACK_SIZE
 183
 184
 185                 /* back to the regular __DATA section. */
 186
 187                 .section __DATA, __data
 188                 .align  PPC_PGSHIFT
 189
 190 /* Debugger stack - used by the debugger if present */
 191
 192         .globl  EXT(debstack)
 193 EXT(debstack):
 194                 .set    ., .+KERNEL_STACK_SIZE
 195
 196                 .section __DATA, __data
 197
 198