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 int console_output = 1;
  23 static volatile u32* uart_base;
  24
  25 static inline void putc(int c)
  26 {
  27         /* Check THRE and TEMT bits before we transmit the character.
  28          */
  29         if (console_output) {
  30                 while ((uart_base[UART_LSR] & TX_DONE) != TX_DONE)
  31                         barrier();
  32
  33                 *uart_base = c;
  34         }
  35 }
  36
  37 static void flush(void)
  38 {
  39 }
  40
  41 static __inline__ void __arch_decomp_setup(unsigned long arch_id)
  42 {
  43         /*
  44          * Coyote and gtwx5715 only have UART2 connected
  45          */
  46         if (machine_is_adi_coyote() || machine_is_gtwx5715())
  47                 uart_base = (volatile u32*) IXP4XX_UART2_BASE_PHYS;
  48         else
  49                 uart_base = (volatile u32*) IXP4XX_UART1_BASE_PHYS;
  50
  51         if (machine_is_ess710() || machine_is_ivpn() || machine_is_sg560() ||
  52             machine_is_sg565() || machine_is_sg580() || machine_is_sg720() ||
  53             machine_is_shiva1100() || machine_is_sg590())
  54                 console_output = 0;
  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 #if defined(CONFIG_MACH_SG560) || defined(CONFIG_MACH_SG580) || \
  63     defined(CONFIG_MACH_ESS710) || defined(CONFIG_MACH_SG720) || \
  64     defined(CONFIG_MACH_SG590) || defined(CONFIG_MACH_IVPN)
  65 #define arch_decomp_wdog() \
  66          *((volatile u32 *)(IXP4XX_GPIO_BASE_PHYS+IXP4XX_GPIO_GPOUTR_OFFSET)) ^= 0x00004000
  67 #elif defined(CONFIG_MACH_SG565) || defined(CONFIG_MACH_SHIVA1100)
  68 #define arch_decomp_wdog() \
  69         *((volatile unsigned char *) SG565_WATCHDOG_BASE_PHYS) = 0
  70 #else
  71 #define arch_decomp_wdog()
  72 #endif
  73
  74 #endif