1 /* 2 * arch/arm/mach-netx/include/mach/uncompress.h 3 * 4 * Copyright (C) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix 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 version 2 8 * as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 */ 19 20 /* 21 * The following code assumes the serial port has already been 22 * initialized by the bootloader. We search for the first enabled 23 * port in the most probable order. If you didn't setup a port in 24 * your bootloader then nothing will appear (which might be desired). 25 * 26 * This does not append a newline 27 */ 28 29 #define REG(x) (*(volatile unsigned long *)(x)) 30 31 #define UART1_BASE 0x100a00 32 #define UART2_BASE 0x100a80 33 34 #define UART_DR 0x0 35 36 #define UART_CR 0x14 37 #define CR_UART_EN (1<<0) 38 39 #define UART_FR 0x18 40 #define FR_BUSY (1<<3) 41 #define FR_TXFF (1<<5) 42 putc(char c)43static inline void putc(char c) 44 { 45 unsigned long base; 46 47 if (REG(UART1_BASE + UART_CR) & CR_UART_EN) 48 base = UART1_BASE; 49 else if (REG(UART2_BASE + UART_CR) & CR_UART_EN) 50 base = UART2_BASE; 51 else 52 return; 53 54 while (REG(base + UART_FR) & FR_TXFF); 55 REG(base + UART_DR) = c; 56 } 57 flush(void)58static inline void flush(void) 59 { 60 unsigned long base; 61 62 if (REG(UART1_BASE + UART_CR) & CR_UART_EN) 63 base = UART1_BASE; 64 else if (REG(UART2_BASE + UART_CR) & CR_UART_EN) 65 base = UART2_BASE; 66 else 67 return; 68 69 while (REG(base + UART_FR) & FR_BUSY); 70 } 71 72 /* 73 * nothing to do 74 */ 75 #define arch_decomp_setup() 76