osfmk/kdp/ml/ppc/kdp_misc.s

   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 #include <debug.h>
  26 #include <ppc/asm.h>
  27 #include <ppc/proc_reg.h>
  28 #include <mach/ppc/vm_param.h>
  29 #include <assym.s>
  30
  31 ENTRY(kdp_sync_cache, TAG_NO_FRAME_USED)
  32         sync                                    /* data sync */
  33         isync                                   /* inst sync */
  34         blr                                             /* return nothing */
  35
  36
  37 ;
  38 ;               This is a really stupid physical copy. 1 whole byte at a time...
  39 ;               Source and dest are long longs.  We do this with 64-bit on if
  40 ;               supported.
  41 ;
  42
  43                         .align  5
  44                         .globl  EXT(kdp_copy_phys)
  45
  46 LEXT(kdp_copy_phys)
  47
  48                         mflr    r12                                             ; Save return
  49
  50                         bl              EXT(ml_set_physical_disabled)   ; No DR and get 64-bit
  51
  52                         rlwinm  r3,r3,0,1,0                             ; Dup low to high source
  53                         rlwinm  r5,r5,0,1,0                             ; Dup low to high dest
  54                         rlwimi  r3,r4,0,0,31                    ; Copy bottom on in source
  55                         rlwimi  r5,r6,0,0,31                    ; Copy bottom on in dest
  56
  57 kcpagain:       addic.  r7,r7,-1                                ; Drop count
  58                         blt--   kcpdone                                 ; All done...
  59                         lbz             r0,0(r3)                                ; Grab a whole one
  60                         stb             r0,0(r5)                                ; Lay it gently down
  61                         addi    r3,r3,1                                 ; Next source
  62                         addi    r5,r5,1                                 ; Next destination
  63                         b               kcpagain                                ; Once more with feeling...
  64
  65 kcpdone:        bl              EXT(ml_restore)                 ; Put trans, etc back
  66                         mtlr    r12                                             ; Restore return
  67                         blr                                                             ; Come again please...
  68