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bootloader/u-boot_2015_04/drivers/bootcount/bootcount.c 2.17 KB
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  /*
   * (C) Copyright 2010-2012
   * Stefan Roese, DENX Software Engineering, sr@denx.de.
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  
  #include <bootcount.h>
  #include <linux/compiler.h>
  
  /*
   * Only override CONFIG_SYS_BOOTCOUNT_ADDR if not already defined. This
   * way, some boards can define it directly in their config header.
   */
  #if !defined(CONFIG_SYS_BOOTCOUNT_ADDR)
  
  #if defined(CONFIG_MPC5xxx)
  #define CONFIG_SYS_BOOTCOUNT_ADDR	(MPC5XXX_CDM_BRDCRMB)
  #define CONFIG_SYS_BOOTCOUNT_SINGLEWORD
  #endif /* defined(CONFIG_MPC5xxx) */
  
  #if defined(CONFIG_MPC512X)
  #define CONFIG_SYS_BOOTCOUNT_ADDR	(&((immap_t *)CONFIG_SYS_IMMR)->clk.bcr)
  #define CONFIG_SYS_BOOTCOUNT_SINGLEWORD
  #endif /* defined(CONFIG_MPC512X) */
  
  #if defined(CONFIG_8xx)
  #define CONFIG_SYS_BOOTCOUNT_ADDR (((immap_t *)CONFIG_SYS_IMMR)->im_cpm.cp_dpmem + \
  				CPM_BOOTCOUNT_ADDR)
  #endif /* defined(CONFIG_8xx) */
  
  #if defined(CONFIG_MPC8260)
  #include <asm/cpm_8260.h>
  
  #define CONFIG_SYS_BOOTCOUNT_ADDR	(CONFIG_SYS_IMMR + CPM_BOOTCOUNT_ADDR)
  #endif /* defined(CONFIG_MPC8260) */
  
  #if defined(CONFIG_QE)
  #include <linux/immap_qe.h>
  
  #define CONFIG_SYS_BOOTCOUNT_ADDR	(CONFIG_SYS_IMMR + 0x110000 + \
  					 QE_MURAM_SIZE - 2 * sizeof(u32))
  #endif /* defined(CONFIG_MPC8360) */
  
  #if defined(CONFIG_4xx)
  #define CONFIG_SYS_BOOTCOUNT_ADDR	(CONFIG_SYS_OCM_DATA_ADDR + \
  				CONFIG_SYS_BOOTCOUNT_ADDR)
  #endif /* defined(CONFIG_4xx) */
  
  #endif /* !defined(CONFIG_SYS_BOOTCOUNT_ADDR) */
  
  /* Now implement the generic default functions */
  #if defined(CONFIG_SYS_BOOTCOUNT_ADDR)
  __weak void bootcount_store(ulong a)
  {
  	void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
  
  #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
  	raw_bootcount_store(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a);
  #else
  	raw_bootcount_store(reg, a);
  	raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC);
  #endif
  }
  
  __weak ulong bootcount_load(void)
  {
  	void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
  
  #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
  	u32 tmp = raw_bootcount_load(reg);
  
  	if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
  		return 0;
  	else
  		return (tmp & 0x0000ffff);
  #else
  	if (raw_bootcount_load(reg + 4) != BOOTCOUNT_MAGIC)
  		return 0;
  	else
  		return raw_bootcount_load(reg);
  #endif
  }
  #endif