osfmk/kdp/ml/ppc/kdp_misc.s

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 #include <debug.h>
  29 #include <ppc/asm.h>
  30 #include <ppc/proc_reg.h>
  31 #include <mach/ppc/vm_param.h>
  32 #include <assym.s>
  33
  34 ENTRY(kdp_sync_cache, TAG_NO_FRAME_USED)
  35         sync                                    /* data sync */
  36         isync                                   /* inst sync */
  37         blr                                             /* return nothing */
  38
  39
  40 ;
  41 ;               This is a really stupid physical copy. 1 whole byte at a time...
  42 ;               Source and dest are long longs.  We do this with 64-bit on if
  43 ;               supported.
  44 ;
  45
  46                         .align  5
  47                         .globl  EXT(kdp_copy_phys)
  48
  49 LEXT(kdp_copy_phys)
  50
  51                         mflr    r12                                             ; Save return
  52
  53                         bl              EXT(ml_set_physical_disabled)   ; No DR and get 64-bit
  54
  55                         rlwinm  r3,r3,0,1,0                             ; Dup low to high source
  56                         rlwinm  r5,r5,0,1,0                             ; Dup low to high dest
  57                         rlwimi  r3,r4,0,0,31                    ; Copy bottom on in source
  58                         rlwimi  r5,r6,0,0,31                    ; Copy bottom on in dest
  59
  60 kcpagain:       addic.  r7,r7,-1                                ; Drop count
  61                         blt--   kcpdone                                 ; All done...
  62                         lbz             r0,0(r3)                                ; Grab a whole one
  63                         stb             r0,0(r5)                                ; Lay it gently down
  64                         addi    r3,r3,1                                 ; Next source
  65                         addi    r5,r5,1                                 ; Next destination
  66                         b               kcpagain                                ; Once more with feeling...
  67
  68 kcpdone:        bl              EXT(ml_restore)                 ; Put trans, etc back
  69                         mtlr    r12                                             ; Restore return
  70                         blr                                                             ; Come again please...
  71