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