include/asm-arm/arch-s3c24a0/uncompress.h

   1 /*
   2  * include/asm-arm/arch-s3c24a0/uncompress.h
   3  *
   4  * $Id: uncompress.h,v 1.3 2006/12/12 13:13:07 gerg Exp $
   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 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11
  12 /*
  13  * The following code assumes the serial port has already been
  14  * initialized by the bootloader. We use only UART1 on S3C24xx
  15  */
  16
  17 #define ULCON                   0x0
  18 #define UTRSTAT                 0x10
  19 #define UTXH                    0x20
  20 #define UTRSTAT_TX_EMPTY        (1 << 2)
  21
  22 #define UART0                   0x44400000
  23 #define UART1                   0x44404000
  24
  25 #define UART(x)                 (*(volatile unsigned long *)(serial_port + (x)))
  26
  27 static void putstr(const char *s)
  28 {
  29         unsigned long serial_port;
  30
  31         do {
  32                 serial_port = UART0;
  33                 if (UART(ULCON) == 0x3) break;
  34                 serial_port = UART1;
  35                 if (UART(ULCON) == 0x3) break;
  36         } while (0);
  37
  38         for (; *s; s++) {
  39                 /* wait */
  40                 while (!(UART(UTRSTAT) & UTRSTAT_TX_EMPTY));
  41
  42                 /* send the character out. */
  43                 UART(UTXH) = *s;
  44
  45                 /* if a LF, also do CR... */
  46                 if (*s == 10) {
  47                         while (!(UART(UTRSTAT) & UTRSTAT_TX_EMPTY));
  48
  49                         UART(UTXH) = 13;
  50                 }
  51         }
  52 }
  53
  54
  55 /*
  56  * Nothing to do for these
  57  */
  58 #define arch_decomp_setup()
  59 #define arch_decomp_wdog()