env_callback.h 2.4 KB

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  1. /* SPDX-License-Identifier: GPL-2.0+ */
  2. /*
  3. * (C) Copyright 2012
  4. * Joe Hershberger, National Instruments, joe.hershberger@ni.com
  5. */
  6. #ifndef __ENV_CALLBACK_H__
  7. #define __ENV_CALLBACK_H__
  8. #include <env_flags.h>
  9. #include <linker_lists.h>
  10. #include <search.h>
  11. #define ENV_CALLBACK_VAR ".callbacks"
  12. /* Board configs can define additional static callback bindings */
  13. #ifndef CONFIG_ENV_CALLBACK_LIST_STATIC
  14. #define CONFIG_ENV_CALLBACK_LIST_STATIC
  15. #endif
  16. #ifdef CONFIG_SILENT_CONSOLE
  17. #define SILENT_CALLBACK "silent:silent,"
  18. #else
  19. #define SILENT_CALLBACK
  20. #endif
  21. #ifdef CONFIG_SPLASHIMAGE_GUARD
  22. #define SPLASHIMAGE_CALLBACK "splashimage:splashimage,"
  23. #else
  24. #define SPLASHIMAGE_CALLBACK
  25. #endif
  26. #ifdef CONFIG_REGEX
  27. #define ENV_DOT_ESCAPE "\\"
  28. #define ETHADDR_WILDCARD "\\d?"
  29. #else
  30. #define ENV_DOT_ESCAPE
  31. #define ETHADDR_WILDCARD
  32. #endif
  33. #ifdef CONFIG_CMD_DNS
  34. #define DNS_CALLBACK "dnsip:dnsip,"
  35. #else
  36. #define DNS_CALLBACK
  37. #endif
  38. #ifdef CONFIG_CMD_NET
  39. #define NET_CALLBACKS \
  40. "bootfile:bootfile," \
  41. "ipaddr:ipaddr," \
  42. "gatewayip:gatewayip," \
  43. "netmask:netmask," \
  44. "serverip:serverip," \
  45. "nvlan:nvlan," \
  46. "vlan:vlan," \
  47. DNS_CALLBACK \
  48. "eth" ETHADDR_WILDCARD "addr:ethaddr,"
  49. #else
  50. #define NET_CALLBACKS
  51. #endif
  52. /*
  53. * This list of callback bindings is static, but may be overridden by defining
  54. * a new association in the ".callbacks" environment variable.
  55. */
  56. #define ENV_CALLBACK_LIST_STATIC ENV_DOT_ESCAPE ENV_CALLBACK_VAR ":callbacks," \
  57. ENV_DOT_ESCAPE ENV_FLAGS_VAR ":flags," \
  58. "baudrate:baudrate," \
  59. NET_CALLBACKS \
  60. "loadaddr:loadaddr," \
  61. SILENT_CALLBACK \
  62. SPLASHIMAGE_CALLBACK \
  63. "stdin:console,stdout:console,stderr:console," \
  64. "serial#:serialno," \
  65. CONFIG_ENV_CALLBACK_LIST_STATIC
  66. struct env_clbk_tbl {
  67. const char *name; /* Callback name */
  68. int (*callback)(const char *name, const char *value, enum env_op op,
  69. int flags);
  70. };
  71. void env_callback_init(ENTRY *var_entry);
  72. /*
  73. * Define a callback that can be associated with variables.
  74. * when associated through the ".callbacks" environment variable, the callback
  75. * will be executed any time the variable is inserted, overwritten, or deleted.
  76. */
  77. #ifdef CONFIG_SPL_BUILD
  78. #define U_BOOT_ENV_CALLBACK(name, callback) \
  79. static inline __maybe_unused void _u_boot_env_noop_##name(void) \
  80. { \
  81. (void)callback; \
  82. }
  83. #else
  84. #define U_BOOT_ENV_CALLBACK(name, callback) \
  85. ll_entry_declare(struct env_clbk_tbl, name, env_clbk) = \
  86. {#name, callback}
  87. #endif
  88. #endif /* __ENV_CALLBACK_H__ */