cpu/ppc4xx/commproc.c

   1 /*
   2  * (C) Copyright 2000-2004
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   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  * Atapted for ppc4XX by Denis Peter
  25  */
  26
  27 #include <common.h>
  28 #include <commproc.h>
  29 #include <asm/io.h>
  30
  31 #if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER)
  32
  33 #if defined(CFG_POST_ALT_WORD_ADDR)
  34 void post_word_store (ulong a)
  35 {
  36         out_be32((void *)CFG_POST_ALT_WORD_ADDR, a);
  37 }
  38
  39 ulong post_word_load (void)
  40 {
  41         return in_be32((void *)CFG_POST_ALT_WORD_ADDR);
  42 }
  43 #else /* CFG_POST_ALT_WORD_ADDR */
  44 void post_word_store (ulong a)
  45 {
  46         volatile void *save_addr = (volatile void *)(CFG_OCM_DATA_ADDR + CFG_POST_WORD_ADDR);
  47         *(volatile ulong *) save_addr = a;
  48 }
  49
  50 ulong post_word_load (void)
  51 {
  52         volatile void *save_addr = (volatile void *)(CFG_OCM_DATA_ADDR + CFG_POST_WORD_ADDR);
  53         return *(volatile ulong *) save_addr;
  54 }
  55 #endif /* CFG_POST_ALT_WORD_ADDR */
  56
  57 #endif  /* CONFIG_POST || CONFIG_LOGBUFFER*/
  58
  59 #ifdef CONFIG_BOOTCOUNT_LIMIT
  60
  61 void bootcount_store (ulong a)
  62 {
  63         volatile ulong *save_addr =
  64                 (volatile ulong *)(CFG_OCM_DATA_ADDR + CFG_BOOTCOUNT_ADDR);
  65
  66         save_addr[0] = a;
  67         save_addr[1] = BOOTCOUNT_MAGIC;
  68 }
  69
  70 ulong bootcount_load (void)
  71 {
  72         volatile ulong *save_addr =
  73                 (volatile ulong *)(CFG_OCM_DATA_ADDR + CFG_BOOTCOUNT_ADDR);
  74
  75         if (save_addr[1] != BOOTCOUNT_MAGIC)
  76                 return 0;
  77         else
  78                 return save_addr[0];
  79 }
  80
  81 #endif /* CONFIG_BOOTCOUNT_LIMIT */