49a4450563
When updating firmware, it is very often that we may want to preserve
few sections, for example vital product data (VPD) including serial
number, calibration data and cache. A firmware updater has to hard-code
the section names that need to be preserved and is hard to maintain.
A better approach is to specify that in FMAP area flags (the `area_flag`
field) using FMAP_AREA_PRESERVE. With this patchset, a FMD parser flag
"PRESERVE" is introduced and will be converted to FMAP_AREA_PRESERVE
when generating FMAP data (by fmap_from_fmd.c).
For example, The FMD statement:
RO_VPD(PRESERVE)@0x0 16k
will generate an FMAP firmware section that:
area_name = "RO_VPD"
area_offset = 0
area_size = 16384
area_flags = FMAP_AREA_PRESERVE
BUG=chromium:936768
TEST=make; boots on x86 "google/eve" and arm "google/kukui" devices
Manually added 'PRESERVE' to some FMD files, and verify (by running
fmap.py) the output coreboot.rom has FMAP_AREA_PRESERVE set
Change-Id: I51e7d31029b98868a1cab0d26bf04a14db01b1c0
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31707
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
117 lines
3.1 KiB
Plaintext
117 lines
3.1 KiB
Plaintext
/* A Bison parser, made by GNU Bison 3.0.4. */
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/* Bison interface for Yacc-like parsers in C
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Copyright (C) 1984, 1989-1990, 2000-2015 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* As a special exception, you may create a larger work that contains
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part or all of the Bison parser skeleton and distribute that work
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under terms of your choice, so long as that work isn't itself a
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parser generator using the skeleton or a modified version thereof
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as a parser skeleton. Alternatively, if you modify or redistribute
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the parser skeleton itself, you may (at your option) remove this
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special exception, which will cause the skeleton and the resulting
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Bison output files to be licensed under the GNU General Public
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License without this special exception.
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This special exception was added by the Free Software Foundation in
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version 2.2 of Bison. */
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#ifndef YY_YY_Y_TAB_H_INCLUDED
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# define YY_YY_Y_TAB_H_INCLUDED
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/* Debug traces. */
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#ifndef YYDEBUG
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# define YYDEBUG 0
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#endif
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#if YYDEBUG
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extern int yydebug;
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#endif
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/* "%code requires" blocks. */
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#line 34 "fmd_parser.y" /* yacc.c:1909 */
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#include "fmd.h"
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#include "option.h"
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#include <stdbool.h>
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struct descriptor_node {
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struct flashmap_descriptor *val;
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struct descriptor_node *next;
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};
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struct descriptor_list {
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size_t len;
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struct descriptor_node *head;
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struct descriptor_node *tail;
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};
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extern struct flashmap_descriptor *res;
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struct flashmap_descriptor *parse_descriptor(
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char *name, union flashmap_flags flags, struct unsigned_option offset,
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struct unsigned_option size, struct descriptor_list children);
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void yyerror(const char *s);
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#line 69 "y.tab.h" /* yacc.c:1909 */
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/* Token type. */
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#ifndef YYTOKENTYPE
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# define YYTOKENTYPE
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enum yytokentype
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{
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INTEGER = 258,
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OCTAL = 259,
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STRING = 260,
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FLAG_CBFS = 261,
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FLAG_PRESERVE = 262
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};
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#endif
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/* Tokens. */
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#define INTEGER 258
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#define OCTAL 259
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#define STRING 260
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#define FLAG_CBFS 261
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#define FLAG_PRESERVE 262
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/* Value type. */
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#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
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union YYSTYPE
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{
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#line 25 "fmd_parser.y" /* yacc.c:1909 */
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unsigned intval;
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char *strval;
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struct unsigned_option maybe_intval;
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struct flashmap_descriptor *region_ptr;
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union flashmap_flags flags;
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struct descriptor_list region_listhdr;
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#line 104 "y.tab.h" /* yacc.c:1909 */
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};
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typedef union YYSTYPE YYSTYPE;
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# define YYSTYPE_IS_TRIVIAL 1
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# define YYSTYPE_IS_DECLARED 1
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#endif
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extern YYSTYPE yylval;
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int yyparse (void);
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#endif /* !YY_YY_Y_TAB_H_INCLUDED */
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