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 */ putc(int c)50static 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 flush(void)61static 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