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

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  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
 57 

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