1/*
2 * arch/arm/mach-ixp4xx/include/mach/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 "ixp4xx-regs.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
22volatile u32* uart_base;
23
24static inline void putc(int c)
25{
26	/* Check THRE and TEMT bits before we transmit the character.
27	 */
28	while ((uart_base[UART_LSR] & TX_DONE) != TX_DONE)
29		barrier();
30
31	*uart_base = c;
32}
33
34static void flush(void)
35{
36}
37
38static __inline__ void __arch_decomp_setup(unsigned long arch_id)
39{
40	/*
41	 * Some boards are using UART2 as console
42	 */
43	if (machine_is_adi_coyote() || machine_is_gtwx5715() ||
44	    machine_is_gateway7001() || machine_is_wg302v2() ||
45	    machine_is_devixp() || machine_is_miccpt() || machine_is_mic256())
46		uart_base = (volatile u32*) IXP4XX_UART2_BASE_PHYS;
47	else
48		uart_base = (volatile u32*) IXP4XX_UART1_BASE_PHYS;
49}
50
51/*
52 * arch_id is a variable in decompress_kernel()
53 */
54#define arch_decomp_setup()	__arch_decomp_setup(arch_id)
55
56#endif
57