arch/ppc/cpu/74xx_7xx/io.S

   1 /*
   2  *  Copyright (C) 1998  Dan Malek <dmalek@jlc.net>
   3  *  Copyright (C) 1999  Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
   4  *  Copyright (C) 2001  Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   5  *                      Andreas Heppel <aheppel@sysgo.de>
   6  *  Copyright (C) 2002  Wolfgang Denk <wd@denx.de>
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 #include <config.h>
  28 #include <ppc_asm.tmpl>
  29
  30 /* ------------------------------------------------------------------------------- */
  31 /*  Function:     in8 */
  32 /*  Description:  Input 8 bits */
  33 /* ------------------------------------------------------------------------------- */
  34         .globl  in8
  35 in8:
  36         lbz     r3,0(r3)
  37         sync
  38         blr
  39
  40 /* ------------------------------------------------------------------------------- */
  41 /*  Function:     in16 */
  42 /*  Description:  Input 16 bits */
  43 /* ------------------------------------------------------------------------------- */
  44         .globl  in16
  45 in16:
  46         lhz     r3,0(r3)
  47         sync
  48         blr
  49
  50 /* ------------------------------------------------------------------------------- */
  51 /*  Function:     in16r */
  52 /*  Description:  Input 16 bits and byte reverse */
  53 /* ------------------------------------------------------------------------------- */
  54         .globl  in16r
  55 in16r:
  56         lhbrx   r3,0,r3
  57         sync
  58         blr
  59
  60 /* ------------------------------------------------------------------------------- */
  61 /*  Function:     in32 */
  62 /*  Description:  Input 32 bits */
  63 /* ------------------------------------------------------------------------------- */
  64         .globl  in32
  65 in32:
  66         lwz     3,0(3)
  67         sync
  68         blr
  69
  70 /* ------------------------------------------------------------------------------- */
  71 /*  Function:     in32r */
  72 /*  Description:  Input 32 bits and byte reverse */
  73 /* ------------------------------------------------------------------------------- */
  74     .globl  in32r
  75 in32r:
  76         lwbrx   r3,0,r3
  77         sync
  78         blr
  79
  80 /* ------------------------------------------------------------------------------- */
  81 /*  Function:     out8 */
  82 /*  Description:  Output 8 bits */
  83 /* ------------------------------------------------------------------------------- */
  84         .globl  out8
  85 out8:
  86         stb     r4,0(r3)
  87         sync
  88         blr
  89
  90 /* ------------------------------------------------------------------------------- */
  91 /*  Function:     out16 */
  92 /*  Description:  Output 16 bits */
  93 /* ------------------------------------------------------------------------------- */
  94         .globl  out16
  95 out16:
  96         sth     r4,0(r3)
  97         sync
  98         blr
  99
 100 /* ------------------------------------------------------------------------------- */
 101 /*  Function:     out16r */
 102 /*  Description:  Byte reverse and output 16 bits */
 103 /* ------------------------------------------------------------------------------- */
 104         .globl  out16r
 105 out16r:
 106         sthbrx  r4,0,r3
 107         sync
 108         blr
 109
 110 /* ------------------------------------------------------------------------------- */
 111 /*  Function:     out32 */
 112 /*  Description:  Output 32 bits */
 113 /* ------------------------------------------------------------------------------- */
 114         .globl  out32
 115 out32:
 116         stw     r4,0(r3)
 117         sync
 118         blr
 119
 120 /* ------------------------------------------------------------------------------- */
 121 /*  Function:     out32r */
 122 /*  Description:  Byte reverse and output 32 bits */
 123 /* ------------------------------------------------------------------------------- */
 124         .globl  out32r
 125 out32r:
 126         stwbrx  r4,0,r3
 127         sync
 128         blr