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 #define ETHADDR_WILDCARD "\\d?" 37 #else 38 #define ENV_DOT_ESCAPE 39 #define ETHADDR_WILDCARD 40 #endif 41 42 #ifdef CONFIG_CMD_DNS 43 #define DNS_CALLBACK "dnsip:dnsip," 44 #else 45 #define DNS_CALLBACK 46 #endif 47 48 #ifdef CONFIG_NET 49 #define NET_CALLBACKS \ 50 "bootfile:bootfile," \ 51 "ipaddr:ipaddr," \ 52 "gatewayip:gatewayip," \ 53 "netmask:netmask," \ 54 "serverip:serverip," \ 55 "nvlan:nvlan," \ 56 "vlan:vlan," \ 57 DNS_CALLBACK \ 58 "eth" ETHADDR_WILDCARD "addr:ethaddr," 59 #else 60 #define NET_CALLBACKS 61 #endif 62 63 /* 64 * This list of callback bindings is static, but may be overridden by defining 65 * a new association in the ".callbacks" environment variable. 66 */ 67 #define ENV_CALLBACK_LIST_STATIC ENV_DOT_ESCAPE ENV_CALLBACK_VAR ":callbacks," \ 68 ENV_DOT_ESCAPE ENV_FLAGS_VAR ":flags," \ 69 "baudrate:baudrate," \ 70 NET_CALLBACKS \ 71 "loadaddr:loadaddr," \ 72 SILENT_CALLBACK \ 73 SPLASHIMAGE_CALLBACK \ 74 "stdin:console,stdout:console,stderr:console," \ 75 "serial#:serialno," \ 76 CONFIG_ENV_CALLBACK_LIST_STATIC 77 78 struct env_clbk_tbl { 79 const char *name; /* Callback name */ 80 int (*callback)(const char *name, const char *value, enum env_op op, 81 int flags); 82 }; 83 84 void env_callback_init(ENTRY *var_entry); 85 86 /* 87 * Define a callback that can be associated with variables. 88 * when associated through the ".callbacks" environment variable, the callback 89 * will be executed any time the variable is inserted, overwritten, or deleted. 90 */ 91 #ifdef CONFIG_SPL_BUILD 92 #define U_BOOT_ENV_CALLBACK(name, callback) \ 93 static inline __maybe_unused void _u_boot_env_noop_##name(void) \ 94 { \ 95 (void)callback; \ 96 } 97 #else 98 #define U_BOOT_ENV_CALLBACK(name, callback) \ 99 ll_entry_declare(struct env_clbk_tbl, name, env_clbk) = \ 100 {#name, callback} 101 #endif 102 103 #endif /* __ENV_CALLBACK_H__ */ 104