LXR linux/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
  311001:           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
  371001:           ldr     \rd, [\rx, #KS8695_URLS]        @ Read Line Status Register
  38                tst     \rd, #URLS_URTHRE               @ Holding Register empty?
  39                beq     1001b
  40        .endm
  41