LXR uboot/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_MPC512X)
  39#define CONFIG_SYS_BOOTCOUNT_ADDR       (&((immap_t *)CONFIG_SYS_IMMR)->clk.bcr)
  40#define CONFIG_SYS_BOOTCOUNT_SINGLEWORD
  41#endif /* defined(CONFIG_MPC512X) */
  42
  43#if defined(CONFIG_8xx)
  44#define CONFIG_SYS_BOOTCOUNT_ADDR (((immap_t *)CONFIG_SYS_IMMR)->im_cpm.cp_dpmem + \
  45                                CPM_BOOTCOUNT_ADDR)
  46#endif /* defined(CONFIG_8xx) */
  47
  48#if defined(CONFIG_MPC8260)
  49#include <asm/cpm_8260.h>
  50
  51#define CONFIG_SYS_BOOTCOUNT_ADDR       (CONFIG_SYS_IMMR + CPM_BOOTCOUNT_ADDR)
  52#endif /* defined(CONFIG_MPC8260) */
  53
  54#if defined(CONFIG_QE)
  55#include <asm/immap_qe.h>
  56
  57#define CONFIG_SYS_BOOTCOUNT_ADDR       (CONFIG_SYS_IMMR + 0x110000 + \
  58                                         QE_MURAM_SIZE - 2 * sizeof(u32))
  59#endif /* defined(CONFIG_MPC8360) */
  60
  61#if defined(CONFIG_4xx)
  62#define CONFIG_SYS_BOOTCOUNT_ADDR       (CONFIG_SYS_OCM_DATA_ADDR + \
  63                                CONFIG_SYS_BOOTCOUNT_ADDR)
  64#endif /* defined(CONFIG_4xx) */
  65
  66#endif /* !defined(CONFIG_SYS_BOOTCOUNT_ADDR) */
  67
  68void bootcount_store(ulong a)
  69{
  70        void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
  71
  72#if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
  73        out_be32(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a);
  74#else
  75        out_be32(reg, a);
  76        out_be32(reg + 4, BOOTCOUNT_MAGIC);
  77#endif
  78}
  79
  80ulong bootcount_load(void)
  81{
  82        void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
  83
  84#if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
  85        u32 tmp = in_be32(reg);
  86
  87        if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
  88                return 0;
  89        else
  90                return (tmp & 0x0000ffff);
  91#else
  92        if (in_be32(reg + 4) != BOOTCOUNT_MAGIC)
  93                return 0;
  94        else
  95                return in_be32(reg);
  96#endif
  97}
  98