include/asm-arm/arch-at91/uncompress.h

   1 /*
   2  * include/asm-arm/arch-at91/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 <asm/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