include/asm-arm/arch-imx/uncompress.h

   1 /*
   2  *  linux/include/asm-arm/arch-imxads/uncompress.h
   3  *
   4  *
   5  *
   6  *  Copyright (C) 1999 ARM Limited
   7  *  Copyright (C) Shane Nay (shane@minirl.com)
   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 as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24 #define UART(x) (*(volatile unsigned long *)(serial_port + (x)))
  25
  26 #define UART1_BASE 0x206000
  27 #define UART2_BASE 0x207000
  28 #define USR2 0x98
  29 #define USR2_TXFE (1<<14)
  30 #define TXR  0x40
  31 #define UCR1 0x80
  32 #define UCR1_UARTEN 1
  33
  34 /*
  35  * The following code assumes the serial port has already been
  36  * initialized by the bootloader.  We search for the first enabled
  37  * port in the most probable order.  If you didn't setup a port in
  38  * your bootloader then nothing will appear (which might be desired).
  39  *
  40  * This does not append a newline
  41  */
  42 static void putc(int c)
  43 {
  44         unsigned long serial_port;
  45
  46         do {
  47                 serial_port = UART1_BASE;
  48                 if ( UART(UCR1) & UCR1_UARTEN )
  49                         break;
  50                 serial_port = UART2_BASE;
  51                 if ( UART(UCR1) & UCR1_UARTEN )
  52                         break;
  53                 return;
  54         } while(0);
  55
  56         while (!(UART(USR2) & USR2_TXFE))
  57                 barrier();
  58
  59         UART(TXR) = c;
  60 }
  61
  62 static inline void flush(void)
  63 {
  64 }
  65
  66 /*
  67  * nothing to do
  68  */
  69 #define arch_decomp_setup()
  70
  71 #define arch_decomp_wdog()