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                 orrne   \rx, \rx, #0x00b00000
  18                 movne   \rx, #0xff000000
  19                 add     \rx,\rx,#3              @ Uart regs are at off set of 3 if
  20                                                 @ byte writes used - Big Endian.
  21                 .endm
  22
  23                .macro  senduart,rd,rx
  24                 strb    \rd, [\rx]
  25                 .endm
  26
  27                 .macro  waituart,rd,rx
  28 1002:           ldrb    \rd, [\rx, #0x14]
  29                 and     \rd, \rd, #0x60         @ check THRE and TEMT bits
  30                 teq     \rd, #0x60
  31                 bne     1002b
  32                 .endm
  33
  34                 .macro  busyuart,rd,rx
  35                 .endm