1 /* 2 * (C) Copyright 2012 3 * Joe Hershberger, National Instruments, joe.hershberger@ni.com 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #ifndef __ENV_CALLBACK_H__ 9 #define __ENV_CALLBACK_H__ 10 11 #include <env_flags.h> 12 #include <linker_lists.h> 13 #include <search.h> 14 15 #define ENV_CALLBACK_VAR ".callbacks" 16 17 /* Board configs can define additional static callback bindings */ 18 #ifndef CONFIG_ENV_CALLBACK_LIST_STATIC 19 #define CONFIG_ENV_CALLBACK_LIST_STATIC 20 #endif 21 22 #ifdef CONFIG_SILENT_CONSOLE 23 #define SILENT_CALLBACK "silent:silent," 24 #else 25 #define SILENT_CALLBACK 26 #endif 27 28 #ifdef CONFIG_SPLASHIMAGE_GUARD 29 #define SPLASHIMAGE_CALLBACK "splashimage:splashimage," 30 #else 31 #define SPLASHIMAGE_CALLBACK 32 #endif 33 34 #ifdef CONFIG_REGEX 35 #define ENV_DOT_ESCAPE "\\" 36 #else 37 #define ENV_DOT_ESCAPE 38 #endif 39 40 #ifdef CONFIG_CMD_DNS 41 #define DNS_CALLBACK "dnsip:dnsip," 42 #else 43 #define DNS_CALLBACK 44 #endif 45 46 #ifdef CONFIG_NET 47 #define NET_CALLBACKS \ 48 "bootfile:bootfile," \ 49 "ipaddr:ipaddr," \ 50 "gatewayip:gatewayip," \ 51 "netmask:netmask," \ 52 "serverip:serverip," \ 53 "nvlan:nvlan," \ 54 "vlan:vlan," \ 55 DNS_CALLBACK 56 #else 57 #define NET_CALLBACKS 58 #endif 59 60 /* 61 * This list of callback bindings is static, but may be overridden by defining 62 * a new association in the ".callbacks" environment variable. 63 */ 64 #define ENV_CALLBACK_LIST_STATIC ENV_DOT_ESCAPE ENV_CALLBACK_VAR ":callbacks," \ 65 ENV_DOT_ESCAPE ENV_FLAGS_VAR ":flags," \ 66 "baudrate:baudrate," \ 67 NET_CALLBACKS \ 68 "loadaddr:loadaddr," \ 69 SILENT_CALLBACK \ 70 SPLASHIMAGE_CALLBACK \ 71 "stdin:console,stdout:console,stderr:console," \ 72 CONFIG_ENV_CALLBACK_LIST_STATIC 73 74 struct env_clbk_tbl { 75 const char *name; /* Callback name */ 76 int (*callback)(const char *name, const char *value, enum env_op op, 77 int flags); 78 }; 79 80 void env_callback_init(ENTRY *var_entry); 81 82 /* 83 * Define a callback that can be associated with variables. 84 * when associated through the ".callbacks" environment variable, the callback 85 * will be executed any time the variable is inserted, overwritten, or deleted. 86 */ 87 #ifdef CONFIG_SPL_BUILD 88 #define U_BOOT_ENV_CALLBACK(name, callback) \ 89 static inline __maybe_unused void _u_boot_env_noop_##name(void) \ 90 { \ 91 (void)callback; \ 92 } 93 #else 94 #define U_BOOT_ENV_CALLBACK(name, callback) \ 95 ll_entry_declare(struct env_clbk_tbl, name, env_clbk) = \ 96 {#name, callback} 97 #endif 98 99 #endif /* __ENV_CALLBACK_H__ */ 100