9497fcb742
The idea of "annotation" for firmware sections was pretty flexible, but in future we will want multiple attributes applied to same area. For example, indicate the section must be preserved when updating firmware so serial number or MAC address can be preserved. The solution here is to extend annotation so it can take multiple identifiers (flags) in a row. For example, to declare a 64KB COREBOOT section as CBFS using annotation: COREBOOT(CBFS)@0x0 64k If there's a new flag "PRESERVE" indicating the section must be preserved before update, we can declare it following CBFS flag: COREBOOT(CBFS PRESERVE)@0x0 64k The flags are directly parsed in fmd_parser, and stored in an union flashmap_flags. Output modules can choose to ignore or process the flags. Currently the only supported flag is "CBFS" (for backward compatible with annotation). There will be more new flags in follow up patches. BUG=chromium:936768 TEST=make; boots on x86 "google/eve" and arm "google/kukui" devices Change-Id: Ie2d99f570e6faff6ed3a4344d6af7526a4515fae Signed-off-by: Hung-Te Lin <hungte@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/31706 Reviewed-by: Julius Werner <jwerner@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
77 lines
1.9 KiB
Text
77 lines
1.9 KiB
Text
/*
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* fmd_scanner.l, scanner generator for flashmap descriptor language
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*
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* Copyright (C) 2015 Google, Inc.
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*
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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; version 2 of the License.
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*
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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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*/
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%{
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#include "fmd_parser.h"
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#include <assert.h>
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#include <string.h>
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int parse_integer(char *src, int base);
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int copy_string(const char *src);
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%}
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%option noyywrap
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%s FLAGS
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MULTIPLIER [KMG]
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%%
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[[:space:]]+ /* Eat whitespace. */
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#.*$ /* Eat comments. */
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\( BEGIN(FLAGS); return *yytext;
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<FLAGS>\) BEGIN(INITIAL); return *yytext;
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<FLAGS>CBFS return FLAG_CBFS;
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0{MULTIPLIER}? |
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[1-9][0-9]*{MULTIPLIER}? return parse_integer(yytext, 10);
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0[0-9]+{MULTIPLIER}? return OCTAL;
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0[xX][0-9a-fA-F]+{MULTIPLIER}? return parse_integer(yytext + 2, 16);
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[^#@{}()[:space:]]* return copy_string(yytext);
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. return *yytext;
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%%
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int parse_integer(char *src, int base)
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{
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char *multiplier = NULL;
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unsigned val = strtoul(src, &multiplier, base);
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if (*multiplier) {
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switch(*multiplier) {
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case 'K':
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val *= 1024;
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break;
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case 'M':
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val *= 1024*1024;
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break;
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case 'G':
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val *= 1024*1024*1024;
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break;
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default:
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// If we ever get here, the MULTIPLIER regex is allowing
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// multiplier suffixes not handled by this code.
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assert(false);
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}
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}
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yylval.intval = val;
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return INTEGER;
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}
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int copy_string(const char *src)
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{
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yylval.strval = strdup(src);
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return STRING;
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}
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