arch/arm/mach-spear/include/mach/uncompress.h

   1 /*
   2  * arch/arm/plat-spear/include/plat/uncompress.h
   3  *
   4  * Serial port stubs for kernel decompress status messages
   5  *
   6  * Copyright (C) 2009 ST Microelectronics
   7  * Viresh Kumar <vireshk@kernel.org>
   8  *
   9  * This file is licensed under the terms of the GNU General Public
  10  * License version 2. This program is licensed "as is" without any
  11  * warranty of any kind, whether express or implied.
  12  */
  13
  14 #include <linux/io.h>
  15 #include <linux/amba/serial.h>
  16 #include <mach/spear.h>
  17
  18 #ifndef __PLAT_UNCOMPRESS_H
  19 #define __PLAT_UNCOMPRESS_H
  20 /*
  21  * This does not append a newline
  22  */
  23 static inline void putc(int c)
  24 {
  25         void __iomem *base = (void __iomem *)SPEAR_DBG_UART_BASE;
  26
  27         while (readl_relaxed(base + UART01x_FR) & UART01x_FR_TXFF)
  28                 barrier();
  29
  30         writel_relaxed(c, base + UART01x_DR);
  31 }
  32
  33 static inline void flush(void)
  34 {
  35 }
  36
  37 /*
  38  * nothing to do
  39  */
  40 #define arch_decomp_setup()
  41
  42 #endif /* __PLAT_UNCOMPRESS_H */