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92 lines
3.0 KiB
92 lines
3.0 KiB
/* 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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