LXR linux/arch/arm/mach-netx/include/mach/uncompress.h

   1/*
   2 * arch/arm/mach-netx/include/mach/uncompress.h
   3 *
   4 * Copyright (C) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2
   8 * as published by the Free Software Foundation.
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program; if not, write to the Free Software
  17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18 */
  19
  20/*
  21 * The following code assumes the serial port has already been
  22 * initialized by the bootloader.  We search for the first enabled
  23 * port in the most probable order.  If you didn't setup a port in
  24 * your bootloader then nothing will appear (which might be desired).
  25 *
  26 * This does not append a newline
  27 */
  28
  29#define REG(x) (*(volatile unsigned long *)(x))
  30
  31#define UART1_BASE 0x100a00
  32#define UART2_BASE 0x100a80
  33
  34#define UART_DR 0x0
  35
  36#define UART_CR 0x14
  37#define CR_UART_EN (1<<0)
  38
  39#define UART_FR 0x18
  40#define FR_BUSY (1<<3)
  41#define FR_TXFF (1<<5)
  42
  43static void putc(char c)
  44{
  45        unsigned long base;
  46
  47        if (REG(UART1_BASE + UART_CR) & CR_UART_EN)
  48                base = UART1_BASE;
  49        else if (REG(UART2_BASE + UART_CR) & CR_UART_EN)
  50                base = UART2_BASE;
  51        else
  52                return;
  53
  54        while (REG(base + UART_FR) & FR_TXFF);
  55        REG(base + UART_DR) = c;
  56}
  57
  58static inline void flush(void)
  59{
  60        unsigned long base;
  61
  62        if (REG(UART1_BASE + UART_CR) & CR_UART_EN)
  63                base = UART1_BASE;
  64        else if (REG(UART2_BASE + UART_CR) & CR_UART_EN)
  65                base = UART2_BASE;
  66        else
  67                return;
  68
  69        while (REG(base + UART_FR) & FR_BUSY);
  70}
  71
  72/*
  73 * nothing to do
  74 */
  75#define arch_decomp_setup()
  76#define arch_decomp_wdog()
  77