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

   1 /*
   2  * arch/arm/mach-ixp4xx/include/mach/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 "ixp4xx-regs.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 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          * Some boards are using UART2 as console
  42          */
  43         if (machine_is_adi_coyote() || machine_is_gtwx5715() ||
  44             machine_is_gateway7001() || machine_is_wg302v2() ||
  45             machine_is_devixp() || machine_is_miccpt() || machine_is_mic256())
  46                 uart_base = (volatile u32*) IXP4XX_UART2_BASE_PHYS;
  47         else
  48                 uart_base = (volatile u32*) IXP4XX_UART1_BASE_PHYS;
  49 }
  50
  51 /*
  52  * arch_id is a variable in decompress_kernel()
  53  */
  54 #define arch_decomp_setup()     __arch_decomp_setup(arch_id)
  55
  56 #endif