env_callback.h
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/*
* (C) Copyright 2012
* Joe Hershberger, National Instruments, joe.hershberger@ni.com
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __ENV_CALLBACK_H__
#define __ENV_CALLBACK_H__
#include <env_flags.h>
#include <linker_lists.h>
#include <search.h>
#define ENV_CALLBACK_VAR ".callbacks"
/* Board configs can define additional static callback bindings */
#ifndef CONFIG_ENV_CALLBACK_LIST_STATIC
#define CONFIG_ENV_CALLBACK_LIST_STATIC
#endif
#ifdef CONFIG_SILENT_CONSOLE
#define SILENT_CALLBACK "silent:silent,"
#else
#define SILENT_CALLBACK
#endif
#ifdef CONFIG_SPLASHIMAGE_GUARD
#define SPLASHIMAGE_CALLBACK "splashimage:splashimage,"
#else
#define SPLASHIMAGE_CALLBACK
#endif
#ifdef CONFIG_REGEX
#define ENV_DOT_ESCAPE "\\"
#define ETHADDR_WILDCARD "\\d?"
#else
#define ENV_DOT_ESCAPE
#define ETHADDR_WILDCARD
#endif
#ifdef CONFIG_CMD_DNS
#define DNS_CALLBACK "dnsip:dnsip,"
#else
#define DNS_CALLBACK
#endif
#ifdef CONFIG_CMD_NET
#define NET_CALLBACKS \
"bootfile:bootfile," \
"ipaddr:ipaddr," \
"gatewayip:gatewayip," \
"netmask:netmask," \
"serverip:serverip," \
"nvlan:nvlan," \
"vlan:vlan," \
DNS_CALLBACK \
"eth" ETHADDR_WILDCARD "addr:ethaddr,"
#else
#define NET_CALLBACKS
#endif
/*
* This list of callback bindings is static, but may be overridden by defining
* a new association in the ".callbacks" environment variable.
*/
#define ENV_CALLBACK_LIST_STATIC ENV_DOT_ESCAPE ENV_CALLBACK_VAR ":callbacks," \
ENV_DOT_ESCAPE ENV_FLAGS_VAR ":flags," \
"baudrate:baudrate," \
NET_CALLBACKS \
"loadaddr:loadaddr," \
SILENT_CALLBACK \
SPLASHIMAGE_CALLBACK \
"stdin:console,stdout:console,stderr:console," \
"serial#:serialno," \
CONFIG_ENV_CALLBACK_LIST_STATIC
struct env_clbk_tbl {
const char *name; /* Callback name */
int (*callback)(const char *name, const char *value, enum env_op op,
int flags);
};
void env_callback_init(ENTRY *var_entry);
/*
* Define a callback that can be associated with variables.
* when associated through the ".callbacks" environment variable, the callback
* will be executed any time the variable is inserted, overwritten, or deleted.
*/
#ifdef CONFIG_SPL_BUILD
#define U_BOOT_ENV_CALLBACK(name, callback) \
static inline __maybe_unused void _u_boot_env_noop_##name(void) \
{ \
(void)callback; \
}
#else
#define U_BOOT_ENV_CALLBACK(name, callback) \
ll_entry_declare(struct env_clbk_tbl, name, env_clbk) = \
{#name, callback}
#endif
#endif /* __ENV_CALLBACK_H__ */