arch/arm/include/debug/ks8695.S

   1 /*
   2  * arch/arm/include/debug/ks8695.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 #define KS8695_UART_PA  0x03ffe000
  15 #define KS8695_UART_VA  0xf00fe000
  16 #define KS8695_URTH     (0x04)
  17 #define KS8695_URLS     (0x14)
  18 #define URLS_URTE       (1 << 6)
  19 #define URLS_URTHRE     (1 << 5)
  20
  21         .macro  addruart, rp, rv, tmp
  22                 ldr     \rp, =KS8695_UART_PA            @ physical base address
  23                 ldr     \rv, =KS8695_UART_VA            @ virtual base address
  24         .endm
  25
  26         .macro  senduart, rd, rx
  27                 str     \rd, [\rx, #KS8695_URTH]        @ Write to Transmit Holding Register
  28         .endm
  29
  30         .macro  busyuart, rd, rx
  31 1001:           ldr     \rd, [\rx, #KS8695_URLS]        @ Read Line Status Register
  32                 tst     \rd, #URLS_URTE                 @ Holding & Shift registers empty?
  33                 beq     1001b
  34         .endm
  35
  36         .macro  waituart, rd, rx
  37 1001:           ldr     \rd, [\rx, #KS8695_URLS]        @ Read Line Status Register
  38                 tst     \rd, #URLS_URTHRE               @ Holding Register empty?
  39                 beq     1001b
  40         .endm