arch/ppc/boot/simple/misc-chestnut.c

   1 /*
   2  * arch/ppc/boot/simple/misc-chestnut.c
   3  *
   4  * Setup for the IBM Chestnut (ibm-750fxgx_eval)
   5  *
   6  * Author: Mark A. Greer <mgreer@mvista.com>
   7  *
   8  * 2005 (c) MontaVista Software, Inc. This file is licensed under
   9  * the terms of the GNU General Public License version 2. This program
  10  * is licensed "as is" without any warranty of any kind, whether express
  11  * or implied.
  12  */
  13
  14 #include <linux/config.h>
  15 #include <linux/types.h>
  16 #include <asm/io.h>
  17 #include <asm/mv64x60_defs.h>
  18 #include <platforms/chestnut.h>
  19
  20 /* Not in the kernel so won't include kernel.h to get its 'max' definition */
  21 #define max(a,b)        (((a) > (b)) ? (a) : (b))
  22
  23 void
  24 mv64x60_board_init(void __iomem *old_base, void __iomem *new_base)
  25 {
  26 #ifdef CONFIG_SERIAL_8250_CONSOLE
  27         /*
  28          * Change device bus 2 window so that bootoader can do I/O thru
  29          * 8250/16550 UART that's mapped in that window.
  30          */
  31         out_le32(new_base + MV64x60_CPU2DEV_2_BASE, CHESTNUT_UART_BASE >> 16);
  32         out_le32(new_base + MV64x60_CPU2DEV_2_SIZE, CHESTNUT_UART_SIZE >> 16);
  33         __asm__ __volatile__("sync");
  34 #endif
  35 }