/*
* linux/include/asm-arm/arch-omap/uncompress.h
*
* Serial port stubs for kernel decompress status messages
*
* Initially based on:
* linux-2.4.15-rmk1-dsplinux1.6/include/asm-arm/arch-omap1510/uncompress.h
* Copyright (C) 2000 RidgeRun, Inc.
* Author: Greg Lonnon <glonnon@ridgerun.com>
*
* Rewritten by:
* Author: <source@mvista.com>
* 2004 (c) MontaVista Software, Inc.
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#include <linux/config.h>
#include <linux/types.h>
#include <linux/serial_reg.h>
#include <asm/mach-types.h>
#include <asm/hardware.h>
#include <asm/arch/serial.h>
#define UART_OMAP_MDR1 0x08 /* mode definition register */
#define check_port(base, shift) ((base[UART_OMAP_MDR1 << shift] & 7) == 0)
static void
puts(const char *s)
{
volatile u8 * uart = 0;
int shift = 0;
/* Determine which serial port to use */
do {
if (machine_is_omap_innovator() || machine_is_omap_osk()) {
shift = 2;
uart = (volatile u8 *)(OMAP_UART1_BASE);
} else if (machine_is_omap_perseus2()) {
shift = 0;
uart = (volatile u8 *)(OMAP_UART1_BASE);
} else {
/* Assume nothing for unknown machines.
* Add an entry for your machine to select
* the default serial console here. If the
* serial port is enabled, we'll use it to
* display status messages. Else we'll be
* quiet.
*/
return;
}
if (check_port(uart, shift))
break;
/* Silent boot if no serial ports are enabled. */
return;
} while (0);
/*
* Now, xmit each character
*/
while (*s) {
while (!(uart[UART_LSR << shift] & UART_LSR_THRE))
barrier();
uart[UART_TX << shift] = *s;
if (*s++ == '\n') {
while (!(uart[UART_LSR << shift] & UART_LSR_THRE))
barrier();
uart[UART_TX << shift] = '\r';
}
}
}
/*
* nothing to do
*/
#define arch_decomp_setup()
#define arch_decomp_wdog()