658f29a51e
Pull in recent changes from the main dtc repository. These changes primarily allow multiple device trees to be declared which are merged by dtc. This feature allows us to include a basic dts file and then provide more information for the specific system through the merging functionality. Changes pulled from git://git.jdl.com/software/dtc.git commit id: 37c0b6a0, "dtc: Add code to make diffing trees easier" Signed-off-by: John Bonesio <bones@secretlab.ca> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
191 lines
4 KiB
Text
191 lines
4 KiB
Text
/*
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* (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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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 GNU
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* General Public License for more details.
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*
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*/
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%option noyywrap nounput noinput never-interactive
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%x INCLUDE
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%x BYTESTRING
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%x PROPNODENAME
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%s V1
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PROPNODECHAR [a-zA-Z0-9,._+*#?@-]
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PATHCHAR ({PROPNODECHAR}|[/])
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LABEL [a-zA-Z_][a-zA-Z0-9_]*
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STRING \"([^\\"]|\\.)*\"
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WS [[:space:]]
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COMMENT "/*"([^*]|\*+[^*/])*\*+"/"
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LINECOMMENT "//".*\n
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%{
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#include "dtc.h"
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#include "srcpos.h"
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#include "dtc-parser.tab.h"
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YYLTYPE yylloc;
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/* CAUTION: this will stop working if we ever use yyless() or yyunput() */
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#define YY_USER_ACTION \
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{ \
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srcpos_update(&yylloc, yytext, yyleng); \
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}
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/*#define LEXDEBUG 1*/
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#ifdef LEXDEBUG
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#define DPRINT(fmt, ...) fprintf(stderr, fmt, ##__VA_ARGS__)
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#else
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#define DPRINT(fmt, ...) do { } while (0)
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#endif
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static int dts_version = 1;
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#define BEGIN_DEFAULT() DPRINT("<V1>\n"); \
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BEGIN(V1); \
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static void push_input_file(const char *filename);
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static int pop_input_file(void);
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%}
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%%
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<*>"/include/"{WS}*{STRING} {
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char *name = strchr(yytext, '\"') + 1;
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yytext[yyleng-1] = '\0';
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push_input_file(name);
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}
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<*><<EOF>> {
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if (!pop_input_file()) {
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yyterminate();
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}
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}
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<*>{STRING} {
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DPRINT("String: %s\n", yytext);
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yylval.data = data_copy_escape_string(yytext+1,
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yyleng-2);
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return DT_STRING;
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}
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<*>"/dts-v1/" {
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DPRINT("Keyword: /dts-v1/\n");
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dts_version = 1;
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BEGIN_DEFAULT();
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return DT_V1;
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}
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<*>"/memreserve/" {
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DPRINT("Keyword: /memreserve/\n");
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BEGIN_DEFAULT();
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return DT_MEMRESERVE;
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}
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<*>{LABEL}: {
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DPRINT("Label: %s\n", yytext);
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yylval.labelref = xstrdup(yytext);
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yylval.labelref[yyleng-1] = '\0';
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return DT_LABEL;
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}
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<V1>[0-9]+|0[xX][0-9a-fA-F]+ {
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yylval.literal = xstrdup(yytext);
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DPRINT("Literal: '%s'\n", yylval.literal);
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return DT_LITERAL;
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}
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<*>\&{LABEL} { /* label reference */
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DPRINT("Ref: %s\n", yytext+1);
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yylval.labelref = xstrdup(yytext+1);
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return DT_REF;
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}
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<*>"&{/"{PATHCHAR}+\} { /* new-style path reference */
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yytext[yyleng-1] = '\0';
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DPRINT("Ref: %s\n", yytext+2);
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yylval.labelref = xstrdup(yytext+2);
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return DT_REF;
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}
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<BYTESTRING>[0-9a-fA-F]{2} {
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yylval.byte = strtol(yytext, NULL, 16);
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DPRINT("Byte: %02x\n", (int)yylval.byte);
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return DT_BYTE;
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}
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<BYTESTRING>"]" {
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DPRINT("/BYTESTRING\n");
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BEGIN_DEFAULT();
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return ']';
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}
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<PROPNODENAME>{PROPNODECHAR}+ {
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DPRINT("PropNodeName: %s\n", yytext);
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yylval.propnodename = xstrdup(yytext);
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BEGIN_DEFAULT();
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return DT_PROPNODENAME;
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}
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"/incbin/" {
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DPRINT("Binary Include\n");
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return DT_INCBIN;
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}
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<*>{WS}+ /* eat whitespace */
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<*>{COMMENT}+ /* eat C-style comments */
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<*>{LINECOMMENT}+ /* eat C++-style comments */
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<*>. {
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DPRINT("Char: %c (\\x%02x)\n", yytext[0],
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(unsigned)yytext[0]);
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if (yytext[0] == '[') {
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DPRINT("<BYTESTRING>\n");
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BEGIN(BYTESTRING);
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}
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if ((yytext[0] == '{')
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|| (yytext[0] == ';')) {
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DPRINT("<PROPNODENAME>\n");
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BEGIN(PROPNODENAME);
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}
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return yytext[0];
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}
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%%
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static void push_input_file(const char *filename)
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{
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assert(filename);
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srcfile_push(filename);
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yyin = current_srcfile->f;
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yypush_buffer_state(yy_create_buffer(yyin, YY_BUF_SIZE));
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}
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static int pop_input_file(void)
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{
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if (srcfile_pop() == 0)
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return 0;
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yypop_buffer_state();
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yyin = current_srcfile->f;
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return 1;
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}
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