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
  43 static 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
  58 static 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()