Browse Source
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>main
David Gibson
17 years ago
committed by
Jon Loeliger
4 changed files with 297 additions and 8 deletions
@ -0,0 +1,260 @@
@@ -0,0 +1,260 @@
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/* |
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* (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005, 2008. |
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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 stack |
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%x INCLUDE |
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%x BYTESTRING |
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%x PROPNODENAME |
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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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%{ |
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#include <stdarg.h> |
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#include <assert.h> |
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#include <fnmatch.h> |
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#include "srcpos.h" |
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static int v1_tagged; /* = 0 */ |
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static int cbase = 16; |
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static int saw_hyphen; /* = 0 */ |
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static unsigned long long last_val; |
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static char *last_name; /* = NULL */ |
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) |
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static inline void __attribute__((noreturn)) die(char * str, ...) |
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{ |
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va_list ap; |
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va_start(ap, str); |
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fprintf(stderr, "FATAL ERROR: "); |
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vfprintf(stderr, str, ap); |
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exit(1); |
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} |
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static inline void *xmalloc(size_t len) |
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{ |
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void *new = malloc(len); |
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if (! new) |
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die("malloc() failed\n"); |
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return new; |
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} |
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const struct { |
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const char *pattern; |
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int obase, width; |
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} guess_table[] = { |
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{ "*-frequency", 10, 0 }, |
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{ "num-*", 10, 0 }, |
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{ "#*-cells", 10, 0 }, |
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{ "*cache-line-size", 10, 0 }, |
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{ "*cache-block-size", 10, 0 }, |
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{ "*cache-size", 10, 0 }, |
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{ "*cache-sets", 10, 0 }, |
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{ "cell-index", 10, 0 }, |
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{ "bank-width", 10, 0 }, |
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{ "*-fifo-size", 10, 0 }, |
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{ "*-frame-size", 10, 0 }, |
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{ "*-channel", 10, 0 }, |
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{ "current-speed", 10, 0 }, |
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{ "phy-map", 16, 8 }, |
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{ "dcr-reg", 16, 3 }, |
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{ "reg", 16, 8 }, |
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{ "ranges", 16, 8}, |
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}; |
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%} |
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%% |
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<*>"/include/" { |
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ECHO; |
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yy_push_state(INCLUDE); |
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} |
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<INCLUDE>\"[^"\n]*\" { |
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ECHO; |
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yy_pop_state(); |
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} |
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<*>\"([^\\"]|\\.)*\" ECHO; |
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<*>"/dts-v1/" { |
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die("Input dts file is already version 1\n"); |
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} |
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<*>"/memreserve/" { |
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if (!v1_tagged) { |
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fprintf(yyout, "/dts-v1/;\n\n"); |
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v1_tagged = 1; |
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} |
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ECHO; |
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BEGIN(INITIAL); |
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} |
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<*>{LABEL}: ECHO; |
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<INITIAL>[bodh]# { |
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if (*yytext == 'b') |
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cbase = 2; |
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else if (*yytext == 'o') |
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cbase = 8; |
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else if (*yytext == 'd') |
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cbase = 10; |
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else |
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cbase = 16; |
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} |
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<INITIAL>[0-9a-fA-F]+ { |
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unsigned long long val; |
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int obase = 16, width = 0; |
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int i; |
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val = strtoull(yytext, NULL, cbase); |
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if (saw_hyphen) |
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val = val - last_val + 1; |
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if (last_name) { |
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for (i = 0; i < ARRAY_SIZE(guess_table); i++) |
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if (fnmatch(guess_table[i].pattern, |
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last_name, 0) == 0) { |
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obase = guess_table[i].obase; |
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width = guess_table[i].width; |
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} |
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} else { |
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obase = 16; |
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width = 16; |
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} |
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if (cbase != 16) |
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obase = cbase; |
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switch (obase) { |
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case 2: |
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case 16: |
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fprintf(yyout, "0x%0*llx", width, val); |
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break; |
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case 8: |
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fprintf(yyout, "0%0*llo", width, val); |
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break; |
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case 10: |
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fprintf(yyout, "%*llu", width, val); |
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break; |
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} |
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cbase = 16; |
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last_val = val; |
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saw_hyphen = 0; |
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} |
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\&{LABEL} ECHO; |
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"&{/"{PATHCHAR}+\} ECHO; |
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<INITIAL>"&/"{PATHCHAR}+ fprintf(yyout, "&{/%s}", yytext + 2); |
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<BYTESTRING>[0-9a-fA-F]{2} ECHO; |
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<BYTESTRING>"]" { |
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ECHO; |
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BEGIN(INITIAL); |
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} |
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<PROPNODENAME>{PROPNODECHAR}+ { |
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ECHO; |
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last_name = strdup(yytext); |
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BEGIN(INITIAL); |
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} |
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<*>[[:space:]]+ ECHO; |
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<*>"/*"([^*]|\*+[^*/])*\*+"/" ECHO; |
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<*>"//".*\n ECHO; |
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<*>- { /* Hack to convert old style memreserves */ |
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saw_hyphen = 1; |
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fprintf(yyout, " "); |
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} |
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<*>. { |
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if (!v1_tagged) { |
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fprintf(yyout, "/dts-v1/;\n\n"); |
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v1_tagged = 1; |
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} |
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ECHO; |
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if (yytext[0] == '[') { |
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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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BEGIN(PROPNODENAME); |
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} |
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} |
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%% |
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static void usage(void) |
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{ |
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fprintf(stderr, "convert-dtsv0 <v0 dts file>...\n"); |
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exit(3); |
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} |
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static void convert_file(const char *fname) |
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{ |
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const char suffix[] = "v1"; |
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int len = strlen(fname); |
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char *newname; |
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newname = xmalloc(len + sizeof(suffix)); |
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memcpy(newname, fname, len); |
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memcpy(newname + len, suffix, sizeof(suffix)); |
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srcpos_file = dtc_open_file(fname, NULL); |
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yyin = srcpos_file->file; |
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yyout = fopen(newname, "w"); |
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if (!yyout) |
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die("Couldn't open output file %s: %s\n", |
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newname, strerror(errno)); |
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while(yylex()) |
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; |
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} |
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int main(int argc, char *argv[]) |
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{ |
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int i; |
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if (argc < 2) |
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usage(); |
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for (i = 1; i < argc; i++) { |
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fprintf(stderr, "Converting %s from dts v0 to dts v1\n", argv[i]); |
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convert_file(argv[i]); |
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} |
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exit(0); |
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} |
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