1 /*
2 * arch/arm/mach-at91/include/mach/uncompress.h
3 *
4 * Copyright (C) 2003 SAN People
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21 #ifndef __ASM_ARCH_UNCOMPRESS_H
22 #define __ASM_ARCH_UNCOMPRESS_H
23
24 #include <linux/io.h>
25 #include <linux/atmel_serial.h>
26
27 #if defined(CONFIG_AT91_EARLY_DBGU)
28 #define UART_OFFSET (AT91_DBGU + AT91_BASE_SYS)
29 #elif defined(CONFIG_AT91_EARLY_USART0)
30 #define UART_OFFSET AT91_USART0
31 #elif defined(CONFIG_AT91_EARLY_USART1)
32 #define UART_OFFSET AT91_USART1
33 #elif defined(CONFIG_AT91_EARLY_USART2)
34 #define UART_OFFSET AT91_USART2
35 #elif defined(CONFIG_AT91_EARLY_USART3)
36 #define UART_OFFSET AT91_USART3
37 #elif defined(CONFIG_AT91_EARLY_USART4)
38 #define UART_OFFSET AT91_USART4
39 #elif defined(CONFIG_AT91_EARLY_USART5)
40 #define UART_OFFSET AT91_USART5
41 #endif
42
43 /*
44 * The following code assumes the serial port has already been
45 * initialized by the bootloader. If you didn't setup a port in
46 * your bootloader then nothing will appear (which might be desired).
47 *
48 * This does not append a newline
49 */
50 static void putc(int c)
51 {
52 #ifdef UART_OFFSET
53 void __iomem *sys = (void __iomem *) UART_OFFSET; /* physical address */
54
55 while (!(__raw_readl(sys + ATMEL_US_CSR) & ATMEL_US_TXRDY))
56 barrier();
57 __raw_writel(c, sys + ATMEL_US_THR);
58 #endif
59 }
60
61 static inline void flush(void)
62 {
63 #ifdef UART_OFFSET
64 void __iomem *sys = (void __iomem *) UART_OFFSET; /* physical address */
65
66 /* wait for transmission to complete */
67 while (!(__raw_readl(sys + ATMEL_US_CSR) & ATMEL_US_TXEMPTY))
68 barrier();
69 #endif
70 }
71
72 #define arch_decomp_setup()
73
74 #define arch_decomp_wdog()
75
76 #endif
77
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