arch/arm/mach-ux500/include/mach/uncompress.h

   1 /*
   2  *  Copyright (C) 2009 ST-Ericsson
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18 #ifndef __ASM_ARCH_UNCOMPRESS_H
  19 #define __ASM_ARCH_UNCOMPRESS_H
  20
  21 #include <asm/setup.h>
  22 #include <asm/mach-types.h>
  23 #include <linux/io.h>
  24 #include <linux/amba/serial.h>
  25 #include <mach/hardware.h>
  26
  27 u32 ux500_uart_base;
  28
  29 static void putc(const char c)
  30 {
  31         /* Do nothing if the UART is not enabled. */
  32         if (!(__raw_readb(ux500_uart_base + UART011_CR) & 0x1))
  33                 return;
  34
  35         if (c == '\n')
  36                 putc('\r');
  37
  38         while (__raw_readb(ux500_uart_base + UART01x_FR) & (1 << 5))
  39                 barrier();
  40         __raw_writeb(c, ux500_uart_base + UART01x_DR);
  41 }
  42
  43 static void flush(void)
  44 {
  45         if (!(__raw_readb(ux500_uart_base + UART011_CR) & 0x1))
  46                 return;
  47         while (__raw_readb(ux500_uart_base + UART01x_FR) & (1 << 3))
  48                 barrier();
  49 }
  50
  51 static inline void arch_decomp_setup(void)
  52 {
  53         /* Check in run time if we run on an U8500 or U5500 */
  54         if (machine_is_u5500())
  55                 ux500_uart_base = U5500_UART0_BASE;
  56         else
  57                 ux500_uart_base = U8500_UART2_BASE;
  58 }
  59
  60 #define arch_decomp_wdog() /* nothing to do here */
  61
  62 #endif /* __ASM_ARCH_UNCOMPRESS_H */