83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
93 lines
3.0 KiB
C
93 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Symbol access for symbols set up by binman as part of the build.
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*
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* This allows C code to access the position of a particular part of the image
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* assembled by binman.
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*
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* Copyright (c) 2017 Google, Inc
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*/
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#ifndef __BINMAN_SYM_H
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#define __BINMAN_SYM_H
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#define BINMAN_SYM_MISSING (-1UL)
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#ifdef CONFIG_BINMAN
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/**
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* binman_symname() - Internal fnuction to get a binman symbol name
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*
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* @entry_name: Name of the entry to look for (e.g. 'u_boot_spl')
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* @_prop_name: Property value to get from that entry (e.g. 'pos')
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* @returns name of the symbol for that entry and property
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*/
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#define binman_symname(_entry_name, _prop_name) \
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_binman_ ## _entry_name ## _prop_ ## _prop_name
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/**
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* binman_sym_declare() - Declare a symbol that will be used at run-time
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*
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* @_type: Type f the symbol (e.g. unsigned long)
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* @entry_name: Name of the entry to look for (e.g. 'u_boot_spl')
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* @_prop_name: Property value to get from that entry (e.g. 'pos')
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*/
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#define binman_sym_declare(_type, _entry_name, _prop_name) \
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_type binman_symname(_entry_name, _prop_name) \
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__attribute__((aligned(4), unused, section(".binman_sym")))
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/**
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* binman_sym_extern() - Declare a extern symbol that will be used at run-time
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*
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* @_type: Type f the symbol (e.g. unsigned long)
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* @entry_name: Name of the entry to look for (e.g. 'u_boot_spl')
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* @_prop_name: Property value to get from that entry (e.g. 'pos')
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*/
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#define binman_sym_extern(_type, _entry_name, _prop_name) \
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extern _type binman_symname(_entry_name, _prop_name) \
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__attribute__((aligned(4), unused, section(".binman_sym")))
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/**
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* binman_sym_declare_optional() - Declare an optional symbol
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*
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* If this symbol cannot be provided by binman, an error will not be generated.
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* Instead the image will be assigned the value BINMAN_SYM_MISSING.
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*
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* @_type: Type f the symbol (e.g. unsigned long)
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* @entry_name: Name of the entry to look for (e.g. 'u_boot_spl')
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* @_prop_name: Property value to get from that entry (e.g. 'pos')
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*/
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#define binman_sym_declare_optional(_type, _entry_name, _prop_name) \
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_type binman_symname(_entry_name, _prop_name) \
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__attribute__((aligned(4), weak, unused, \
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section(".binman_sym")))
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/**
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* binman_sym() - Access a previously declared symbol
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*
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* This is used to get the value of a symbol. E.g.:
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*
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* ulong address = binman_sym(ulong, u_boot_spl, pos);
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*
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* @_type: Type f the symbol (e.g. unsigned long)
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* @entry_name: Name of the entry to look for (e.g. 'u_boot_spl')
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* @_prop_name: Property value to get from that entry (e.g. 'pos')
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* @returns value of that property (filled in by binman)
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*/
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#define binman_sym(_type, _entry_name, _prop_name) \
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(*(_type *)&binman_symname(_entry_name, _prop_name))
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#else /* !BINMAN */
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#define binman_sym_declare(_type, _entry_name, _prop_name)
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#define binman_sym_declare_optional(_type, _entry_name, _prop_name)
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#define binman_sym_extern(_type, _entry_name, _prop_name)
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#define binman_sym(_type, _entry_name, _prop_name) BINMAN_SYM_MISSING
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#endif /* BINMAN */
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#endif
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