Igor Sarkisov | bd995ac | 2020-10-06 12:45:40 -0700 | [diff] [blame] | 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 | /* |
| 35 | * This list of callback bindings is static, but may be overridden by defining |
| 36 | * a new association in the ".callbacks" environment variable. |
| 37 | */ |
| 38 | #define ENV_CALLBACK_LIST_STATIC ENV_CALLBACK_VAR ":callbacks," \ |
| 39 | ENV_FLAGS_VAR ":flags," \ |
| 40 | "baudrate:baudrate," \ |
| 41 | "bootfile:bootfile," \ |
| 42 | "loadaddr:loadaddr," \ |
| 43 | SILENT_CALLBACK \ |
| 44 | SPLASHIMAGE_CALLBACK \ |
| 45 | "stdin:console,stdout:console,stderr:console," \ |
| 46 | CONFIG_ENV_CALLBACK_LIST_STATIC |
| 47 | |
| 48 | struct env_clbk_tbl { |
| 49 | const char *name; /* Callback name */ |
| 50 | int (*callback)(const char *name, const char *value, enum env_op op, |
| 51 | int flags); |
| 52 | }; |
| 53 | |
| 54 | void env_callback_init(ENTRY *var_entry); |
| 55 | |
| 56 | /* |
| 57 | * Define a callback that can be associated with variables. |
| 58 | * when associated through the ".callbacks" environment variable, the callback |
| 59 | * will be executed any time the variable is inserted, overwritten, or deleted. |
| 60 | */ |
| 61 | #ifdef CONFIG_SPL_BUILD |
| 62 | #define U_BOOT_ENV_CALLBACK(name, callback) \ |
| 63 | static inline void _u_boot_env_noop_##name(void) \ |
| 64 | { \ |
| 65 | (void)callback; \ |
| 66 | } |
| 67 | #else |
| 68 | #define U_BOOT_ENV_CALLBACK(name, callback) \ |
| 69 | ll_entry_declare(struct env_clbk_tbl, name, env_clbk) = \ |
| 70 | {#name, callback} |
| 71 | #endif |
| 72 | |
| 73 | #endif /* __ENV_CALLBACK_H__ */ |