arch/arm/mach-lh7a40x/include/mach/debug-macro.S

   1 /* arch/arm/mach-lh7a40x/include/mach/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, rp, rv
  18                 mov     \rp, #0x00000700        @ offset from base
  19                 orr     \rv, \rp, #0xf8000000   @ virtual base
  20                 orr     \rp, \rp, #0x80000000   @ physical base
  21                 .endm
  22
  23                 .macro  senduart,rd,rx
  24                 strb    \rd, [\rx]              @ DATA
  25                 .endm
  26
  27                 .macro  busyuart,rd,rx          @ spin while busy
  28 1001:           ldr     \rd, [\rx, #0x10]       @ STATUS
  29                 tst     \rd, #1 << 3            @ BUSY (TX FIFO not empty)
  30                 bne     1001b                   @ yes, spin
  31                 .endm
  32
  33                 .macro  waituart,rd,rx          @ wait for Tx FIFO room
  34 1001:           ldrb    \rd, [\rx, #0x10]       @ STATUS
  35                 tst     \rd, #1 << 5            @ TXFF (TX FIFO full)
  36                 bne     1001b                   @ yes, spin
  37                 .endm