arch/powerpc/lib/bootcount.c

   1 /*
   2  * (C) Copyright 2010
   3  * Stefan Roese, DENX Software Engineering, sr@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 #include <common.h>
  25 #include <asm/io.h>
  26
  27 /*
  28  * Only override CONFIG_SYS_BOOTCOUNT_ADDR if not already defined. This
  29  * way, some boards can define it directly in their config header.
  30  */
  31 #if !defined(CONFIG_SYS_BOOTCOUNT_ADDR)
  32
  33 #if defined(CONFIG_MPC5xxx)
  34 #define CONFIG_SYS_BOOTCOUNT_ADDR       (MPC5XXX_CDM_BRDCRMB)
  35 #define CONFIG_SYS_BOOTCOUNT_SINGLEWORD
  36 #endif /* defined(CONFIG_MPC5xxx) */
  37
  38 #if defined(CONFIG_8xx)
  39 #define CONFIG_SYS_BOOTCOUNT_ADDR (((immap_t *)CONFIG_SYS_IMMR)->im_cpm.cp_dpmem + \
  40                                 CPM_BOOTCOUNT_ADDR)
  41 #endif /* defined(CONFIG_8xx) */
  42
  43 #if defined(CONFIG_MPC8260)
  44 #include <asm/cpm_8260.h>
  45
  46 #define CONFIG_SYS_BOOTCOUNT_ADDR       (CONFIG_SYS_IMMR + CPM_BOOTCOUNT_ADDR)
  47 #endif /* defined(CONFIG_MPC8260) */
  48
  49 #if defined(CONFIG_MPC8360)
  50 #include <asm/immap_qe.h>
  51
  52 #define CONFIG_SYS_BOOTCOUNT_ADDR       (CONFIG_SYS_IMMR + 0x110000 + \
  53                                          QE_MURAM_SIZE - 2 * sizeof(u32))
  54 #endif /* defined(CONFIG_MPC8360) */
  55
  56 #if defined(CONFIG_4xx)
  57 #define CONFIG_SYS_BOOTCOUNT_ADDR       (CONFIG_SYS_OCM_DATA_ADDR + \
  58                                 CONFIG_SYS_BOOTCOUNT_ADDR)
  59 #endif /* defined(CONFIG_4xx) */
  60
  61 #endif /* !defined(CONFIG_SYS_BOOTCOUNT_ADDR) */
  62
  63 void bootcount_store(ulong a)
  64 {
  65         void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
  66
  67 #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
  68         out_be32(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a);
  69 #else
  70         out_be32(reg, a);
  71         out_be32(reg + 4, BOOTCOUNT_MAGIC);
  72 #endif
  73 }
  74
  75 ulong bootcount_load(void)
  76 {
  77         void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
  78
  79 #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
  80         if (in_be16(reg + 2) != (BOOTCOUNT_MAGIC & 0xffff))
  81                 return 0;
  82         else
  83                 return in_be16(reg);
  84 #else
  85         if (in_be32(reg + 4) != BOOTCOUNT_MAGIC)
  86                 return 0;
  87         else
  88                 return in_be32(reg);
  89 #endif
  90 }