LXR linux/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
  43static 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
  56static inline void flush(void)
  57{
  58}
  59
  60static 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
  74static inline void arch_decomp_wdog(void)
  75{
  76}
  77
  78#endif
  79