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 "eth\\d?addr:ethaddr," 57 #else 58 #define NET_CALLBACKS 59 #endif 60 61 /* 62 * This list of callback bindings is static, but may be overridden by defining 63 * a new association in the ".callbacks" environment variable. 64 */ 65 #define ENV_CALLBACK_LIST_STATIC ENV_DOT_ESCAPE ENV_CALLBACK_VAR ":callbacks," \ 66 ENV_DOT_ESCAPE ENV_FLAGS_VAR ":flags," \ 67 "baudrate:baudrate," \ 68 NET_CALLBACKS \ 69 "loadaddr:loadaddr," \ 70 SILENT_CALLBACK \ 71 SPLASHIMAGE_CALLBACK \ 72 "stdin:console,stdout:console,stderr:console," \ 73 CONFIG_ENV_CALLBACK_LIST_STATIC 74 75 struct env_clbk_tbl { 76 const char *name; /* Callback name */ 77 int (*callback)(const char *name, const char *value, enum env_op op, 78 int flags); 79 }; 80 81 void env_callback_init(ENTRY *var_entry); 82 83 /* 84 * Define a callback that can be associated with variables. 85 * when associated through the ".callbacks" environment variable, the callback 86 * will be executed any time the variable is inserted, overwritten, or deleted. 87 */ 88 #ifdef CONFIG_SPL_BUILD 89 #define U_BOOT_ENV_CALLBACK(name, callback) \ 90 static inline __maybe_unused void _u_boot_env_noop_##name(void) \ 91 { \ 92 (void)callback; \ 93 } 94 #else 95 #define U_BOOT_ENV_CALLBACK(name, callback) \ 96 ll_entry_declare(struct env_clbk_tbl, name, env_clbk) = \ 97 {#name, callback} 98 #endif 99 100 #endif /* __ENV_CALLBACK_H__ */ 101