1*170ab110SJoe Hershberger /* 2*170ab110SJoe Hershberger * (C) Copyright 2012 3*170ab110SJoe Hershberger * Joe Hershberger, National Instruments, joe.hershberger@ni.com 4*170ab110SJoe Hershberger * 5*170ab110SJoe Hershberger * See file CREDITS for list of people who contributed to this 6*170ab110SJoe Hershberger * project. 7*170ab110SJoe Hershberger * 8*170ab110SJoe Hershberger * This program is free software; you can redistribute it and/or 9*170ab110SJoe Hershberger * modify it under the terms of the GNU General Public License as 10*170ab110SJoe Hershberger * published by the Free Software Foundation; either version 2 of 11*170ab110SJoe Hershberger * the License, or (at your option) any later version. 12*170ab110SJoe Hershberger * 13*170ab110SJoe Hershberger * This program is distributed in the hope that it will be useful, 14*170ab110SJoe Hershberger * but WITHOUT ANY WARRANTY; without even the implied warranty of 15*170ab110SJoe Hershberger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16*170ab110SJoe Hershberger * GNU General Public License for more details. 17*170ab110SJoe Hershberger * 18*170ab110SJoe Hershberger * You should have received a copy of the GNU General Public License 19*170ab110SJoe Hershberger * along with this program; if not, write to the Free Software 20*170ab110SJoe Hershberger * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21*170ab110SJoe Hershberger * MA 02111-1307 USA 22*170ab110SJoe Hershberger */ 23*170ab110SJoe Hershberger 24*170ab110SJoe Hershberger #ifndef __ENV_CALLBACK_H__ 25*170ab110SJoe Hershberger #define __ENV_CALLBACK_H__ 26*170ab110SJoe Hershberger 27*170ab110SJoe Hershberger #include <linker_lists.h> 28*170ab110SJoe Hershberger #include <search.h> 29*170ab110SJoe Hershberger 30*170ab110SJoe Hershberger #define ENV_CALLBACK_VAR ".callbacks" 31*170ab110SJoe Hershberger 32*170ab110SJoe Hershberger /* Board configs can define additional static callback bindings */ 33*170ab110SJoe Hershberger #ifndef CONFIG_ENV_CALLBACK_LIST_STATIC 34*170ab110SJoe Hershberger #define CONFIG_ENV_CALLBACK_LIST_STATIC 35*170ab110SJoe Hershberger #endif 36*170ab110SJoe Hershberger 37*170ab110SJoe Hershberger /* 38*170ab110SJoe Hershberger * This list of callback bindings is static, but may be overridden by defining 39*170ab110SJoe Hershberger * a new association in the ".callbacks" environment variable. 40*170ab110SJoe Hershberger */ 41*170ab110SJoe Hershberger #define ENV_CALLBACK_LIST_STATIC ENV_CALLBACK_VAR ":callbacks," \ 42*170ab110SJoe Hershberger CONFIG_ENV_CALLBACK_LIST_STATIC 43*170ab110SJoe Hershberger 44*170ab110SJoe Hershberger struct env_clbk_tbl { 45*170ab110SJoe Hershberger const char *name; /* Callback name */ 46*170ab110SJoe Hershberger int (*callback)(const char *name, const char *value, enum env_op op, 47*170ab110SJoe Hershberger int flags); 48*170ab110SJoe Hershberger }; 49*170ab110SJoe Hershberger 50*170ab110SJoe Hershberger struct env_clbk_tbl *find_env_callback(const char *); 51*170ab110SJoe Hershberger void env_callback_init(ENTRY *var_entry); 52*170ab110SJoe Hershberger 53*170ab110SJoe Hershberger /* 54*170ab110SJoe Hershberger * Define a callback that can be associated with variables. 55*170ab110SJoe Hershberger * when associated through the ".callbacks" environment variable, the callback 56*170ab110SJoe Hershberger * will be executed any time the variable is inserted, overwritten, or deleted. 57*170ab110SJoe Hershberger */ 58*170ab110SJoe Hershberger #define U_BOOT_ENV_CALLBACK(name, callback) \ 59*170ab110SJoe Hershberger ll_entry_declare(struct env_clbk_tbl, name, env_clbk, env_clbk) = \ 60*170ab110SJoe Hershberger {#name, callback} 61*170ab110SJoe Hershberger 62*170ab110SJoe Hershberger #endif /* __ENV_CALLBACK_H__ */ 63