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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 | 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__ */ |