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(char 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         *uart_base = c;
  30 }
  31
  32 /*
  33  * This does not append a newline
  34  */
  35 static void putstr(const char *s)
  36 {
  37         while (*s)
  38         {
  39                 putc(*s);
  40                 if (*s == '\n')
  41                         putc('\r');
  42                 s++;
  43         }
  44 }
  45
  46 static __inline__ void __arch_decomp_setup(unsigned long arch_id)
  47 {
  48         /*
  49          * Coyote and gtwx5715 only have UART2 connected
  50          */
  51         if (machine_is_adi_coyote() || machine_is_gtwx5715())
  52                 uart_base = (volatile u32*) IXP4XX_UART2_BASE_PHYS;
  53         else
  54                 uart_base = (volatile u32*) IXP4XX_UART1_BASE_PHYS;
  55 }
  56
  57 /*
  58  * arch_id is a variable in decompress_kernel()
  59  */
  60 #define arch_decomp_setup()     __arch_decomp_setup(arch_id)
  61
  62 #define arch_decomp_wdog()
  63
  64 #endif