release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-tegra/include/mach/uncompress.h

   1 /*
   2  * arch/arm/mach-tegra/include/mach/uncompress.h
   3  *
   4  * Copyright (C) 2010 Google, Inc.
   5  *
   6  * Author:
   7  *      Colin Cross <ccross@google.com>
   8  *      Erik Gilling <konkers@google.com>
   9  *
  10  * This software is licensed under the terms of the GNU General Public
  11  * License version 2, as published by the Free Software Foundation, and
  12  * may be copied, distributed, and modified under those terms.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  */
  20
  21 #ifndef __MACH_TEGRA_UNCOMPRESS_H
  22 #define __MACH_TEGRA_UNCOMPRESS_H
  23
  24 #include <linux/types.h>
  25 #include <linux/serial_reg.h>
  26
  27 #include <mach/iomap.h>
  28
  29 #if defined(CONFIG_TEGRA_DEBUG_UARTA)
  30 #define DEBUG_UART_BASE TEGRA_UARTA_BASE
  31 #elif defined(CONFIG_TEGRA_DEBUG_UARTB)
  32 #define DEBUG_UART_BASE TEGRA_UARTB_BASE
  33 #elif defined(CONFIG_TEGRA_DEBUG_UARTC)
  34 #define DEBUG_UART_BASE TEGRA_UARTC_BASE
  35 #elif defined(CONFIG_TEGRA_DEBUG_UARTD)
  36 #define DEBUG_UART_BASE TEGRA_UARTD_BASE
  37 #elif defined(CONFIG_TEGRA_DEBUG_UARTE)
  38 #define DEBUG_UART_BASE TEGRA_UARTE_BASE
  39 #else
  40 #define DEBUG_UART_BASE NULL
  41 #endif
  42
  43 static void putc(int c)
  44 {
  45         volatile u8 *uart = (volatile u8 *)DEBUG_UART_BASE;
  46         int shift = 2;
  47
  48         if (uart == NULL)
  49                 return;
  50
  51         while (!(uart[UART_LSR << shift] & UART_LSR_THRE))
  52                 barrier();
  53         uart[UART_TX << shift] = c;
  54 }
  55
  56 static inline void flush(void)
  57 {
  58 }
  59
  60 static inline void arch_decomp_setup(void)
  61 {
  62         volatile u8 *uart = (volatile u8 *)DEBUG_UART_BASE;
  63         int shift = 2;
  64
  65         if (uart == NULL)
  66                 return;
  67
  68         uart[UART_LCR << shift] |= UART_LCR_DLAB;
  69         uart[UART_DLL << shift] = 0x75;
  70         uart[UART_DLM << shift] = 0x0;
  71         uart[UART_LCR << shift] = 3;
  72 }
  73
  74 static inline void arch_decomp_wdog(void)
  75 {
  76 }
  77
  78 #endif