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 #include <mach/hardware.h> 27 28 #if defined(CONFIG_AT91_EARLY_DBGU0) 29 #define UART_OFFSET AT91_BASE_DBGU0 30 #elif defined(CONFIG_AT91_EARLY_DBGU1) 31 #define UART_OFFSET AT91_BASE_DBGU1 32 #elif defined(CONFIG_AT91_EARLY_USART0) 33 #define UART_OFFSET AT91_USART0 34 #elif defined(CONFIG_AT91_EARLY_USART1) 35 #define UART_OFFSET AT91_USART1 36 #elif defined(CONFIG_AT91_EARLY_USART2) 37 #define UART_OFFSET AT91_USART2 38 #elif defined(CONFIG_AT91_EARLY_USART3) 39 #define UART_OFFSET AT91_USART3 40 #elif defined(CONFIG_AT91_EARLY_USART4) 41 #define UART_OFFSET AT91_USART4 42 #elif defined(CONFIG_AT91_EARLY_USART5) 43 #define UART_OFFSET AT91_USART5 44 #endif 45 46 /* 47 * The following code assumes the serial port has already been 48 * initialized by the bootloader. If you didn't setup a port in 49 * your bootloader then nothing will appear (which might be desired). 50 * 51 * This does not append a newline 52 */ putc(int c)53static void putc(int c) 54 { 55 #ifdef UART_OFFSET 56 void __iomem *sys = (void __iomem *) UART_OFFSET; /* physical address */ 57 58 while (!(__raw_readl(sys + ATMEL_US_CSR) & ATMEL_US_TXRDY)) 59 barrier(); 60 __raw_writel(c, sys + ATMEL_US_THR); 61 #endif 62 } 63 flush(void)64static inline void flush(void) 65 { 66 #ifdef UART_OFFSET 67 void __iomem *sys = (void __iomem *) UART_OFFSET; /* physical address */ 68 69 /* wait for transmission to complete */ 70 while (!(__raw_readl(sys + ATMEL_US_CSR) & ATMEL_US_TXEMPTY)) 71 barrier(); 72 #endif 73 } 74 75 #define arch_decomp_setup() 76 77 #define arch_decomp_wdog() 78 79 #endif 80