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

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