include/asm-arm/arch-ixp4xx/uncompress.h

   1 /*
   2  * include/asm-arm/arch-ixp4xx/uncompress.h
   3  *
   4  * Copyright (C) 2002 Intel Corporation.
   5  * Copyright (C) 2003-2004 MontaVista Software, Inc.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  */
  12
  13 #ifndef _ARCH_UNCOMPRESS_H_
  14 #define _ARCH_UNCOMPRESS_H_
  15
  16 #include <asm/hardware.h>
  17 #include <asm/mach-types.h>
  18 #include <linux/serial_reg.h>
  19
  20 #define TX_DONE (UART_LSR_TEMT|UART_LSR_THRE)
  21
  22 static volatile u32* uart_base;
  23
  24 static inline void putc(int c)
  25 {
  26         /* Check THRE and TEMT bits before we transmit the character.
  27          */
  28         while ((uart_base[UART_LSR] & TX_DONE) != TX_DONE)
  29                 barrier();
  30
  31         *uart_base = c;
  32 }
  33
  34 static void flush(void)
  35 {
  36 }
  37
  38 static __inline__ void __arch_decomp_setup(unsigned long arch_id)
  39 {
  40         /*
  41          * Coyote and gtwx5715 only have UART2 connected
  42          */
  43         if (machine_is_adi_coyote() || machine_is_gtwx5715())
  44                 uart_base = (volatile u32*) IXP4XX_UART2_BASE_PHYS;
  45         else
  46                 uart_base = (volatile u32*) IXP4XX_UART1_BASE_PHYS;
  47 }
  48
  49 /*
  50  * arch_id is a variable in decompress_kernel()
  51  */
  52 #define arch_decomp_setup()     __arch_decomp_setup(arch_id)
  53
  54 #define arch_decomp_wdog()
  55
  56 #endif