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

   1 /*
   2  * (C) Copyright 2001
   3  * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 /*
   9  * cpu_init.c - low level cpu init
  10  *
  11  * there's really nothing going on here yet.  future work area?
  12  */
  13
  14 #include <common.h>
  15 #include <74xx_7xx.h>
  16
  17 /*
  18  * Breath some life into the CPU...
  19  *
  20  * there's basically nothing to do here since the memory controller
  21  * isn't on the CPU in this case.
  22  */
  23 void
  24 cpu_init_f (void)
  25 {
  26         switch (get_cpu_type()) {
  27         case CPU_7450:
  28         case CPU_7455:
  29         case CPU_7457:
  30         case CPU_7447A:
  31         case CPU_7448:
  32                 /* enable the timebase bit in HID0 */
  33                 set_hid0(get_hid0() | 0x4000000);
  34                 break;
  35         default:
  36                 /* do nothing */
  37                 break;
  38         }
  39 }
  40
  41 /*
  42  * initialize higher level parts of CPU like timers
  43  */
  44 int cpu_init_r (void)
  45 {
  46         return (0);
  47 }