linux/arch/arm/mach-tegra/include/mach/uncompress.h

/*
 * arch/arm/mach-tegra/include/mach/uncompress.h
 *
 * Copyright (C) 2010 Google, Inc.
 *
 * Author:
 *	Colin Cross <ccross@google.com>
 *	Erik Gilling <konkers@google.com>
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#ifndef __MACH_TEGRA_UNCOMPRESS_H
#define __MACH_TEGRA_UNCOMPRESS_H

#include <linux/types.h>
#include <linux/serial_reg.h>

#include <mach/iomap.h>

#if defined(CONFIG_TEGRA_DEBUG_UARTA)
#define DEBUG_UART_BASE TEGRA_UARTA_BASE
#elif defined(CONFIG_TEGRA_DEBUG_UARTB)
#define DEBUG_UART_BASE TEGRA_UARTB_BASE
#elif defined(CONFIG_TEGRA_DEBUG_UARTC)
#define DEBUG_UART_BASE TEGRA_UARTC_BASE
#elif defined(CONFIG_TEGRA_DEBUG_UARTD)
#define DEBUG_UART_BASE TEGRA_UARTD_BASE
#elif defined(CONFIG_TEGRA_DEBUG_UARTE)
#define DEBUG_UART_BASE TEGRA_UARTE_BASE
#else
#define DEBUG_UART_BASE NULL
#endif

static void putc(int c)
{
	volatile u8 *uart = (volatile u8 *)DEBUG_UART_BASE;
	int shift = 2;

	if (uart == NULL)
		return;

	while (!(uart[UART_LSR << shift] & UART_LSR_THRE))
		barrier();
	uart[UART_TX << shift] = c;
}

static inline void flush(void)
{
}

static inline void arch_decomp_setup(void)
{
	volatile u8 *uart = (volatile u8 *)DEBUG_UART_BASE;
	int shift = 2;

	if (uart == NULL)
		return;

	uart[UART_LCR << shift] |= UART_LCR_DLAB;
	uart[UART_DLL << shift] = 0x75;
	uart[UART_DLM << shift] = 0x0;
	uart[UART_LCR << shift] = 3;
}

static inline void arch_decomp_wdog(void)
{
}

#endif