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uncompress.h

/*
 *  arch/arm/plat-mxc/include/mach/uncompress.h
 *
 *
 *
 *  Copyright (C) 1999 ARM Limited
 *  Copyright (C) Shane Nay (shane@minirl.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#ifndef __ASM_ARCH_MXC_UNCOMPRESS_H__
#define __ASM_ARCH_MXC_UNCOMPRESS_H__

#define __MXC_BOOT_UNCOMPRESS

#include <mach/hardware.h>

#define UART(x) (*(volatile unsigned long *)(serial_port + (x)))

#define USR2 0x98
#define USR2_TXFE (1<<14)
#define TXR  0x40
#define UCR1 0x80
#define UCR1_UARTEN 1

/*
 * The following code assumes the serial port has already been
 * initialized by the bootloader.  We search for the first enabled
 * port in the most probable order.  If you didn't setup a port in
 * your bootloader then nothing will appear (which might be desired).
 *
 * This does not append a newline
 */

static void putc(int ch)
{
      static unsigned long serial_port = 0;

      if (unlikely(serial_port == 0)) {
            do {
                  serial_port = UART1_BASE_ADDR;
                  if (UART(UCR1) & UCR1_UARTEN)
                        break;
                  serial_port = UART2_BASE_ADDR;
                  if (UART(UCR1) & UCR1_UARTEN)
                        break;
                  return;
            } while (0);
      }

      while (!(UART(USR2) & USR2_TXFE))
            barrier();

      UART(TXR) = ch;
}

#define flush() do { } while (0)

/*
 * nothing to do
 */
#define arch_decomp_setup()

#define arch_decomp_wdog()

#endif                        /* __ASM_ARCH_MXC_UNCOMPRESS_H__ */

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