arch/ppc/cpu/74xx_7xx/cpu_init.c

   1 /*
   2  * (C) Copyright 2001
   3  * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*
  25  * cpu_init.c - low level cpu init
  26  *
  27  * there's really nothing going on here yet.  future work area?
  28  */
  29
  30 #include <common.h>
  31 #include <74xx_7xx.h>
  32
  33 /*
  34  * Breath some life into the CPU...
  35  *
  36  * there's basically nothing to do here since the memory controller
  37  * isn't on the CPU in this case.
  38  */
  39 void
  40 cpu_init_f (void)
  41 {
  42         switch (get_cpu_type()) {
  43         case CPU_7450:
  44         case CPU_7455:
  45         case CPU_7457:
  46         case CPU_7447A:
  47         case CPU_7448:
  48                 /* enable the timebase bit in HID0 */
  49                 set_hid0(get_hid0() | 0x4000000);
  50                 break;
  51         default:
  52                 /* do nothing */
  53                 break;
  54         }
  55 }
  56
  57 /*
  58  * initialize higher level parts of CPU like timers
  59  */
  60 int cpu_init_r (void)
  61 {
  62         return (0);
  63 }