LXR linux/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
  22volatile u32* uart_base;
  23
  24static 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
  34static void flush(void)
  35{
  36}
  37
  38static __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
  57