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   1 /*
   2  * arch/arm/mach-ks8695/include/mach/debug-macro.S
   3  *
   4  * Copyright (C) 2006 Ben Dooks <ben@simtec.co.uk>
   5  * Copyright (C) 2006 Simtec Electronics
   6  *
   7  * KS8695 - Debug macros
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <mach/hardware.h>
  15 #include <mach/regs-uart.h>
  16
  17         .macro  addruart, rx
  18                 mrc     p15, 0, \rx, c1, c0
  19                 tst     \rx, #1                         @ MMU enabled?
  20                 ldreq   \rx, =KS8695_UART_PA            @ physical base address
  21                 ldrne   \rx, =KS8695_UART_VA            @ virtual base address
  22         .endm
  23
  24         .macro  senduart, rd, rx
  25                 str     \rd, [\rx, #KS8695_URTH]        @ Write to Transmit Holding Register
  26         .endm
  27
  28         .macro  busyuart, rd, rx
  29 1001:           ldr     \rd, [\rx, #KS8695_URLS]        @ Read Line Status Register
  30                 tst     \rd, #URLS_URTE                 @ Holding & Shift registers empty?
  31                 beq     1001b
  32         .endm
  33
  34         .macro  waituart, rd, rx
  35 1001:           ldr     \rd, [\rx, #KS8695_URLS]        @ Read Line Status Register
  36                 tst     \rd, #URLS_URTHRE               @ Holding Register empty?
  37                 beq     1001b
  38         .endm