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 #define ETHADDR_WILDCARD "\\d?" 36 #else 37 #define ENV_DOT_ESCAPE 38 #define ETHADDR_WILDCARD 39 #endif 40 41 #ifdef CONFIG_CMD_DNS 42 #define DNS_CALLBACK "dnsip:dnsip," 43 #else 44 #define DNS_CALLBACK 45 #endif 46 47 #ifdef CONFIG_CMD_NET 48 #define NET_CALLBACKS \ 49 "bootfile:bootfile," \ 50 "ipaddr:ipaddr," \ 51 "gatewayip:gatewayip," \ 52 "netmask:netmask," \ 53 "serverip:serverip," \ 54 "nvlan:nvlan," \ 55 "vlan:vlan," \ 56 DNS_CALLBACK \ 57 "eth" ETHADDR_WILDCARD "addr:ethaddr," 58 #else 59 #define NET_CALLBACKS 60 #endif 61 62 /* 63 * This list of callback bindings is static, but may be overridden by defining 64 * a new association in the ".callbacks" environment variable. 65 */ 66 #define ENV_CALLBACK_LIST_STATIC ENV_DOT_ESCAPE ENV_CALLBACK_VAR ":callbacks," \ 67 ENV_DOT_ESCAPE ENV_FLAGS_VAR ":flags," \ 68 "baudrate:baudrate," \ 69 NET_CALLBACKS \ 70 "loadaddr:loadaddr," \ 71 SILENT_CALLBACK \ 72 SPLASHIMAGE_CALLBACK \ 73 "stdin:console,stdout:console,stderr:console," \ 74 "serial#:serialno," \ 75 CONFIG_ENV_CALLBACK_LIST_STATIC 76 77 struct env_clbk_tbl { 78 const char *name; /* Callback name */ 79 int (*callback)(const char *name, const char *value, enum env_op op, 80 int flags); 81 }; 82 83 void env_callback_init(ENTRY *var_entry); 84 85 /* 86 * Define a callback that can be associated with variables. 87 * when associated through the ".callbacks" environment variable, the callback 88 * will be executed any time the variable is inserted, overwritten, or deleted. 89 */ 90 #ifdef CONFIG_SPL_BUILD 91 #define U_BOOT_ENV_CALLBACK(name, callback) \ 92 static inline __maybe_unused void _u_boot_env_noop_##name(void) \ 93 { \ 94 (void)callback; \ 95 } 96 #else 97 #define U_BOOT_ENV_CALLBACK(name, callback) \ 98 ll_entry_declare(struct env_clbk_tbl, name, env_clbk) = \ 99 {#name, callback} 100 #endif 101 102 #endif /* __ENV_CALLBACK_H__ */ 103