include/asm-arm/arch-ixp4xx/debug-macro.S

   1 /* linux/include/asm-arm/arch-ixp4xx/debug-macro.S
   2  *
   3  * Debugging macro include header
   4  *
   5  *  Copyright (C) 1994-1999 Russell King
   6  *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11 */
  12
  13                 .macro  addruart,rx
  14                 mrc     p15, 0, \rx, c1, c0
  15                 tst     \rx, #1                 @ MMU enabled?
  16                 moveq   \rx, #0xc8000000
  17                 movne   \rx, #0xff000000
  18                 add     \rx,\rx,#3              @ Uart regs are at off set of 3 if
  19                                                 @ byte writes used - Big Endian.
  20                 .endm
  21
  22                .macro  senduart,rd,rx
  23                 strb    \rd, [\rx]
  24                 .endm
  25
  26                 .macro  waituart,rd,rx
  27 1002:           ldrb    \rd, [\rx, #0x14]
  28                 and     \rd, \rd, #0x60         @ check THRE and TEMT bits
  29                 teq     \rd, #0x60
  30                 bne     1002b
  31                 .endm
  32
  33                 .macro  busyuart,rd,rx
  34                 .endm