osfmk/kdp/ml/ppc/kdp_misc.s

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 #include <debug.h>
  31 #include <ppc/asm.h>
  32 #include <ppc/proc_reg.h>
  33 #include <mach/ppc/vm_param.h>
  34 #include <assym.s>
  35
  36 ENTRY(kdp_sync_cache, TAG_NO_FRAME_USED)
  37         sync                                    /* data sync */
  38         isync                                   /* inst sync */
  39         blr                                             /* return nothing */
  40
  41
  42 ;
  43 ;               This is a really stupid physical copy. 1 whole byte at a time...
  44 ;               Source and dest are long longs.  We do this with 64-bit on if
  45 ;               supported.
  46 ;
  47
  48                         .align  5
  49                         .globl  EXT(kdp_copy_phys)
  50
  51 LEXT(kdp_copy_phys)
  52
  53                         mflr    r12                                             ; Save return
  54
  55                         bl              EXT(ml_set_physical_disabled)   ; No DR and get 64-bit
  56
  57                         rlwinm  r3,r3,0,1,0                             ; Dup low to high source
  58                         rlwinm  r5,r5,0,1,0                             ; Dup low to high dest
  59                         rlwimi  r3,r4,0,0,31                    ; Copy bottom on in source
  60                         rlwimi  r5,r6,0,0,31                    ; Copy bottom on in dest
  61
  62 kcpagain:       addic.  r7,r7,-1                                ; Drop count
  63                         blt--   kcpdone                                 ; All done...
  64                         lbz             r0,0(r3)                                ; Grab a whole one
  65                         stb             r0,0(r5)                                ; Lay it gently down
  66                         addi    r3,r3,1                                 ; Next source
  67                         addi    r5,r5,1                                 ; Next destination
  68                         b               kcpagain                                ; Once more with feeling...
  69
  70 kcpdone:        bl              EXT(ml_restore)                 ; Put trans, etc back
  71                         mtlr    r12                                             ; Restore return
  72                         blr                                                             ; Come again please...
  73