LXR uboot/drivers/bootcount/bootcount.c

   1/*
   2 * (C) Copyright 2010-2012
   3 * Stefan Roese, DENX Software Engineering, sr@denx.de.
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 */
   7
   8#include <bootcount.h>
   9#include <linux/compiler.h>
  10
  11/*
  12 * Only override CONFIG_SYS_BOOTCOUNT_ADDR if not already defined. This
  13 * way, some boards can define it directly in their config header.
  14 */
  15#if !defined(CONFIG_SYS_BOOTCOUNT_ADDR)
  16
  17#if defined(CONFIG_MPC5xxx)
  18#define CONFIG_SYS_BOOTCOUNT_ADDR       (MPC5XXX_CDM_BRDCRMB)
  19#define CONFIG_SYS_BOOTCOUNT_SINGLEWORD
  20#endif /* defined(CONFIG_MPC5xxx) */
  21
  22#if defined(CONFIG_MPC512X)
  23#define CONFIG_SYS_BOOTCOUNT_ADDR       (&((immap_t *)CONFIG_SYS_IMMR)->clk.bcr)
  24#define CONFIG_SYS_BOOTCOUNT_SINGLEWORD
  25#endif /* defined(CONFIG_MPC512X) */
  26
  27#if defined(CONFIG_8xx)
  28#define CONFIG_SYS_BOOTCOUNT_ADDR (((immap_t *)CONFIG_SYS_IMMR)->im_cpm.cp_dpmem + \
  29                                CPM_BOOTCOUNT_ADDR)
  30#endif /* defined(CONFIG_8xx) */
  31
  32#if defined(CONFIG_MPC8260)
  33#include <asm/cpm_8260.h>
  34
  35#define CONFIG_SYS_BOOTCOUNT_ADDR       (CONFIG_SYS_IMMR + CPM_BOOTCOUNT_ADDR)
  36#endif /* defined(CONFIG_MPC8260) */
  37
  38#if defined(CONFIG_QE)
  39#include <asm/immap_qe.h>
  40
  41#define CONFIG_SYS_BOOTCOUNT_ADDR       (CONFIG_SYS_IMMR + 0x110000 + \
  42                                         QE_MURAM_SIZE - 2 * sizeof(u32))
  43#endif /* defined(CONFIG_MPC8360) */
  44
  45#if defined(CONFIG_4xx)
  46#define CONFIG_SYS_BOOTCOUNT_ADDR       (CONFIG_SYS_OCM_DATA_ADDR + \
  47                                CONFIG_SYS_BOOTCOUNT_ADDR)
  48#endif /* defined(CONFIG_4xx) */
  49
  50#endif /* !defined(CONFIG_SYS_BOOTCOUNT_ADDR) */
  51
  52/* Now implement the generic default functions */
  53#if defined(CONFIG_SYS_BOOTCOUNT_ADDR)
  54__weak void bootcount_store(ulong a)
  55{
  56        void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
  57
  58#if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
  59        raw_bootcount_store(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a);
  60#else
  61        raw_bootcount_store(reg, a);
  62        raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC);
  63#endif
  64}
  65
  66__weak ulong bootcount_load(void)
  67{
  68        void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
  69
  70#if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
  71        u32 tmp = raw_bootcount_load(reg);
  72
  73        if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
  74                return 0;
  75        else
  76                return (tmp & 0x0000ffff);
  77#else
  78        if (raw_bootcount_load(reg + 4) != BOOTCOUNT_MAGIC)
  79                return 0;
  80        else
  81                return raw_bootcount_load(reg);
  82#endif
  83}
  84#endif
  85