bootcount.c 2.1 KB

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  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. #include <bootcount.h>
  8. #include <linux/compiler.h>
  9. /*
  10. * Only override CONFIG_SYS_BOOTCOUNT_ADDR if not already defined. This
  11. * way, some boards can define it directly in their config header.
  12. */
  13. #if !defined(CONFIG_SYS_BOOTCOUNT_ADDR)
  14. #if defined(CONFIG_MPC5xxx)
  15. #define CONFIG_SYS_BOOTCOUNT_ADDR (MPC5XXX_CDM_BRDCRMB)
  16. #define CONFIG_SYS_BOOTCOUNT_SINGLEWORD
  17. #endif /* defined(CONFIG_MPC5xxx) */
  18. #if defined(CONFIG_MPC512X)
  19. #define CONFIG_SYS_BOOTCOUNT_ADDR (&((immap_t *)CONFIG_SYS_IMMR)->clk.bcr)
  20. #define CONFIG_SYS_BOOTCOUNT_SINGLEWORD
  21. #endif /* defined(CONFIG_MPC512X) */
  22. #if defined(CONFIG_MPC8260)
  23. #include <asm/cpm_8260.h>
  24. #define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_IMMR + CPM_BOOTCOUNT_ADDR)
  25. #endif /* defined(CONFIG_MPC8260) */
  26. #if defined(CONFIG_QE)
  27. #include <linux/immap_qe.h>
  28. #define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_IMMR + 0x110000 + \
  29. QE_MURAM_SIZE - 2 * sizeof(u32))
  30. #endif /* defined(CONFIG_QE) */
  31. #if defined(CONFIG_4xx)
  32. #define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_OCM_DATA_ADDR + \
  33. CONFIG_SYS_BOOTCOUNT_ADDR)
  34. #endif /* defined(CONFIG_4xx) */
  35. #endif /* !defined(CONFIG_SYS_BOOTCOUNT_ADDR) */
  36. /* Now implement the generic default functions */
  37. #if defined(CONFIG_SYS_BOOTCOUNT_ADDR)
  38. __weak void bootcount_store(ulong a)
  39. {
  40. void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
  41. #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
  42. raw_bootcount_store(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a);
  43. #else
  44. raw_bootcount_store(reg, a);
  45. raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC);
  46. #endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD */
  47. }
  48. __weak ulong bootcount_load(void)
  49. {
  50. void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
  51. #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
  52. u32 tmp = raw_bootcount_load(reg);
  53. if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
  54. return 0;
  55. else
  56. return (tmp & 0x0000ffff);
  57. #else
  58. if (raw_bootcount_load(reg + 4) != BOOTCOUNT_MAGIC)
  59. return 0;
  60. else
  61. return raw_bootcount_load(reg);
  62. #endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) */
  63. }
  64. #endif /* defined(CONFIG_SYS_BOOTCOUNT_ADDR) */