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   1 /* linux/include/asm-arm/arch-lh7a40x/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
  14         @ It is not known if this will be appropriate for every 40x
  15         @ board.
  16
  17                 .macro  addruart,rx
  18                 mrc     p15, 0, \rx, c1, c0
  19                 tst     \rx, #1                 @ MMU enabled?
  20                 mov     \rx, #0x00000700        @ offset from base
  21                 orreq   \rx, \rx, #0x80000000   @ physical base
  22                 orrne   \rx, \rx, #0xf8000000   @ virtual base
  23                 .endm
  24
  25                 .macro  senduart,rd,rx
  26                 strb    \rd, [\rx]              @ DATA
  27                 .endm
  28
  29                 .macro  busyuart,rd,rx          @ spin while busy
  30 1001:           ldr     \rd, [\rx, #0x10]       @ STATUS
  31                 tst     \rd, #1 << 3            @ BUSY (TX FIFO not empty)
  32                 bne     1001b                   @ yes, spin
  33                 .endm
  34
  35                 .macro  waituart,rd,rx          @ wait for Tx FIFO room
  36 1001:           ldrb    \rd, [\rx, #0x10]       @ STATUS
  37                 tst     \rd, #1 << 5            @ TXFF (TX FIFO full)
  38                 bne     1001b                   @ yes, spin
  39                 .endm