1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * (C) Copyright 2012 4 * Joe Hershberger, National Instruments, joe.hershberger@ni.com 5 */ 6 7 #ifndef __ENV_CALLBACK_H__ 8 #define __ENV_CALLBACK_H__ 9 10 #include <env_flags.h> 11 #include <linker_lists.h> 12 #include <search.h> 13 14 #define ENV_CALLBACK_VAR ".callbacks" 15 16 /* Board configs can define additional static callback bindings */ 17 #ifndef CONFIG_ENV_CALLBACK_LIST_STATIC 18 #define CONFIG_ENV_CALLBACK_LIST_STATIC 19 #endif 20 21 #ifdef CONFIG_SILENT_CONSOLE 22 #define SILENT_CALLBACK "silent:silent," 23 #else 24 #define SILENT_CALLBACK 25 #endif 26 27 #ifdef CONFIG_SPLASHIMAGE_GUARD 28 #define SPLASHIMAGE_CALLBACK "splashimage:splashimage," 29 #else 30 #define SPLASHIMAGE_CALLBACK 31 #endif 32 33 #ifdef CONFIG_REGEX 34 #define ENV_DOT_ESCAPE "\\" 35 #else 36 #define ENV_DOT_ESCAPE 37 #endif 38 39 #ifdef CONFIG_CMD_DNS 40 #define DNS_CALLBACK "dnsip:dnsip," 41 #else 42 #define DNS_CALLBACK 43 #endif 44 45 #ifdef CONFIG_CMD_NET 46 #define NET_CALLBACKS \ 47 "bootfile:bootfile," \ 48 "ipaddr:ipaddr," \ 49 "gatewayip:gatewayip," \ 50 "netmask:netmask," \ 51 "serverip:serverip," \ 52 "nvlan:nvlan," \ 53 "vlan:vlan," \ 54 DNS_CALLBACK \ 55 "eth" ETHADDR_WILDCARD "addr:ethaddr," 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 "serial#:serialno," \ 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