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dtc: Add program to convert dts files from v0 to v1

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This patch adds a new utility program, convert-dtsv0, to the dtc
sources.  This program will convert dts files from v0 to v1,
preserving comments and spacing.  It also includes some heuristics to
guess an appropriate base to use in the v1 output (so it will use hex
for the contents of reg properties and decimal for clock-frequency
properties, for example).  They're limited and imperfect, but not
terrible.

The guts of the converter program is a modified version of the lexer
from dtc itself.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
David Gibson 2008-05-15 16:39:12 +10:00 • committed by Jon Loeliger
parent 548767f42e
commit a84c065f44
4 changed files with 297 additions and 8 deletions
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260
convert-dtsv0-lexer.l Normal file
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@ -0,0 +1,260 @@
/*
* (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005, 2008.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
%option noyywrap nounput stack
%x INCLUDE
%x BYTESTRING
%x PROPNODENAME
PROPNODECHAR [a-zA-Z0-9,._+*#?@-]
PATHCHAR ({PROPNODECHAR}|[/])
LABEL [a-zA-Z_][a-zA-Z0-9_]*
%{
#include <stdarg.h>
#include <assert.h>
#include <fnmatch.h>
#include "srcpos.h"
static int v1_tagged; /* = 0 */
static int cbase = 16;
static int saw_hyphen; /* = 0 */
static unsigned long long last_val;
static char *last_name; /* = NULL */
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
static inline void __attribute__((noreturn)) die(char * str, ...)
{
va_list ap;
va_start(ap, str);
fprintf(stderr, "FATAL ERROR: ");
vfprintf(stderr, str, ap);
exit(1);
}
static inline void *xmalloc(size_t len)
{
void *new = malloc(len);
if (! new)
die("malloc() failed\n");
return new;
}
const struct {
const char *pattern;
int obase, width;
} guess_table[] = {
{ "*-frequency", 10, 0 },
{ "num-*", 10, 0 },
{ "#*-cells", 10, 0 },
{ "*cache-line-size", 10, 0 },
{ "*cache-block-size", 10, 0 },
{ "*cache-size", 10, 0 },
{ "*cache-sets", 10, 0 },
{ "cell-index", 10, 0 },
{ "bank-width", 10, 0 },
{ "*-fifo-size", 10, 0 },
{ "*-frame-size", 10, 0 },
{ "*-channel", 10, 0 },
{ "current-speed", 10, 0 },
{ "phy-map", 16, 8 },
{ "dcr-reg", 16, 3 },
{ "reg", 16, 8 },
{ "ranges", 16, 8},
};
%}
%%
<*>"/include/" {
ECHO;
yy_push_state(INCLUDE);
}
<INCLUDE>\"[^"\n]*\" {
ECHO;
yy_pop_state();
}
<*>\"([^\\"]|\\.)*\" ECHO;
<*>"/dts-v1/" {
die("Input dts file is already version 1\n");
}
<*>"/memreserve/" {
if (!v1_tagged) {
fprintf(yyout, "/dts-v1/;\n\n");
v1_tagged = 1;
}
ECHO;
BEGIN(INITIAL);
}
<*>{LABEL}: ECHO;
<INITIAL>[bodh]# {
if (*yytext == 'b')
cbase = 2;
else if (*yytext == 'o')
cbase = 8;
else if (*yytext == 'd')
cbase = 10;
else
cbase = 16;
}
<INITIAL>[0-9a-fA-F]+ {
unsigned long long val;
int obase = 16, width = 0;
int i;
val = strtoull(yytext, NULL, cbase);
if (saw_hyphen)
val = val - last_val + 1;
if (last_name) {
for (i = 0; i < ARRAY_SIZE(guess_table); i++)
if (fnmatch(guess_table[i].pattern,
last_name, 0) == 0) {
obase = guess_table[i].obase;
width = guess_table[i].width;
}
} else {
obase = 16;
width = 16;
}
if (cbase != 16)
obase = cbase;
switch (obase) {
case 2:
case 16:
fprintf(yyout, "0x%0*llx", width, val);
break;
case 8:
fprintf(yyout, "0%0*llo", width, val);
break;
case 10:
fprintf(yyout, "%*llu", width, val);
break;
}
cbase = 16;
last_val = val;
saw_hyphen = 0;
}
\&{LABEL} ECHO;
"&{/"{PATHCHAR}+\} ECHO;
<INITIAL>"&/"{PATHCHAR}+ fprintf(yyout, "&{/%s}", yytext + 2);
<BYTESTRING>[0-9a-fA-F]{2} ECHO;
<BYTESTRING>"]" {
ECHO;
BEGIN(INITIAL);
}
<PROPNODENAME>{PROPNODECHAR}+ {
ECHO;
last_name = strdup(yytext);
BEGIN(INITIAL);
}
<*>[[:space:]]+ ECHO;
<*>"/*"([^*]|\*+[^*/])*\*+"/" ECHO;
<*>"//".*\n ECHO;
<*>- { /* Hack to convert old style memreserves */
saw_hyphen = 1;
fprintf(yyout, " ");
}
<*>. {
if (!v1_tagged) {
fprintf(yyout, "/dts-v1/;\n\n");
v1_tagged = 1;
}
ECHO;
if (yytext[0] == '[') {
BEGIN(BYTESTRING);
}
if ((yytext[0] == '{')
|| (yytext[0] == ';')) {
BEGIN(PROPNODENAME);
}
}
%%
static void usage(void)
{
fprintf(stderr, "convert-dtsv0 <v0 dts file>...\n");
exit(3);
}
static void convert_file(const char *fname)
{
const char suffix[] = "v1";
int len = strlen(fname);
char *newname;
newname = xmalloc(len + sizeof(suffix));
memcpy(newname, fname, len);
memcpy(newname + len, suffix, sizeof(suffix));
srcpos_file = dtc_open_file(fname, NULL);
yyin = srcpos_file->file;
yyout = fopen(newname, "w");
if (!yyout)
die("Couldn't open output file %s: %s\n",
newname, strerror(errno));
while(yylex())
;
}
int main(int argc, char *argv[])
{
int i;
if (argc < 2)
usage();
for (i = 1; i < argc; i++) {
fprintf(stderr, "Converting %s from dts v0 to dts v1\n", argv[i]);
convert_file(argv[i]);
}
exit(0);
}