This patch adds a proof of concept framework to implement schema checker
using a combined C and DTSS based approach.
Complex and generic bindings can be implemented directly in C and then
instantiated from simple device-specific bindings using DTS-like DTSS
language.
This is based on Stephen Warren's C based DT schema checker proof of
concept patch.
[original C based DT schema checker proof of concept]
Signed-off-by: Stephen Warren <swarren@xxxxxxxxxxxxx>
[further development into hybrid solution]
Signed-off-by: Tomasz Figa <t.figa@xxxxxxxxxxx>
---
Makefile | 2 +-
Makefile.dtc | 5 +-
checks.c | 15 +++
dtc.c | 17 ++-
dtc.h | 26 +++++
dtss-lexer.l | 291 +++++++++++++++++++++++++++++++++++++++++++++++
dtss-parser.y | 341 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
schemas/schema.c | 311 ++++++++++++++++++++++++++++++++++++++++++++++++++
schemas/schema.h | 89 +++++++++++++++
srcpos.h | 2 +
treesource.c | 22 ++++
11 files changed, 1117 insertions(+), 4 deletions(-)
create mode 100644 dtss-lexer.l
create mode 100644 dtss-parser.y
create mode 100644 schemas/schema.c
create mode 100644 schemas/schema.h
diff --git a/Makefile b/Makefile
index 86f5ab3..0625fb8 100644
--- a/Makefile
+++ b/Makefile
@@ -15,7 +15,7 @@ EXTRAVERSION =
LOCAL_VERSION =
CONFIG_LOCALVERSION =
-CPPFLAGS = -I libfdt -I .
+CPPFLAGS = -I libfdt -I . -I schemas
WARNINGS = -Werror -Wall -Wpointer-arith -Wcast-qual -Wnested-externs \
-Wstrict-prototypes -Wmissing-prototypes -Wredundant-decls -Wshadow
CFLAGS = -g -Os -fPIC -Werror $(WARNINGS)
diff --git a/Makefile.dtc b/Makefile.dtc
index bece49b..bf19564 100644
--- a/Makefile.dtc
+++ b/Makefile.dtc
@@ -12,7 +12,8 @@ DTC_SRCS = \
livetree.c \
srcpos.c \
treesource.c \
- util.c
+ util.c \
+ schemas/schema.c
-DTC_GEN_SRCS = dtc-lexer.lex.c dtc-parser.tab.c
+DTC_GEN_SRCS = dtc-lexer.lex.c dtc-parser.tab.c dtss-lexer.lex.c dtss-parser.tab.c
DTC_OBJS = $(DTC_SRCS:%.c=%.o) $(DTC_GEN_SRCS:%.c=%.o)
diff --git a/checks.c b/checks.c
index 47eda65..7c85fcf 100644
--- a/checks.c
+++ b/checks.c
@@ -19,6 +19,7 @@
*/
#include "dtc.h"
+#include "schemas/schema.h"
#ifdef TRACE_CHECKS
#define TRACE(c, ...) \
@@ -651,6 +652,18 @@ static void check_obsolete_chosen_interrupt_controller(struct check *c,
}
TREE_WARNING(obsolete_chosen_interrupt_controller, NULL);
+/*
+ * Schema checks
+ */
+
+static void check_schema(struct check *c, struct node *dt,
+ struct node *node)
+{
+ if (schema_check_node(dt, node))
+ FAIL(c, "Schema check failed for %s", node->fullpath);
+}
+NODE_ERROR(schema, NULL);
+
static struct check *check_table[] = {
&duplicate_node_names, &duplicate_property_names,
&node_name_chars, &node_name_format, &property_name_chars,
@@ -669,6 +682,8 @@ static struct check *check_table[] = {
&avoid_default_addr_size,
&obsolete_chosen_interrupt_controller,
+ &schema,
+
&always_fail,
};
diff --git a/dtc.c b/dtc.c
index d36ccdc..1a5913b 100644
--- a/dtc.c
+++ b/dtc.c
@@ -20,6 +20,7 @@
#include "dtc.h"
#include "srcpos.h"
+#include "schemas/schema.h"
/*
* Command line options
@@ -49,7 +50,7 @@ static void fill_fullpaths(struct node *tree, const char *prefix)
/* Usage related data. */
static const char usage_synopsis[] = "dtc [options] <input file>";
-static const char usage_short_opts[] = "qI:O:o:V:d:R:S:p:fb:i:H:sW:E:hv";
+static const char usage_short_opts[] = "qI:O:o:V:d:R:S:p:fb:i:H:sW:E:x:hv";
static struct option const usage_long_opts[] = {
{"quiet", no_argument, NULL, 'q'},
{"in-format", a_argument, NULL, 'I'},
@@ -67,6 +68,7 @@ static struct option const usage_long_opts[] = {
{"phandle", a_argument, NULL, 'H'},
{"warning", a_argument, NULL, 'W'},
{"error", a_argument, NULL, 'E'},
+ {"schema", a_argument, NULL, 'x'},
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'v'},
{NULL, no_argument, NULL, 0x0},
@@ -97,6 +99,7 @@ static const char * const usage_opts_help[] = {
"\t\tboth - Both \"linux,phandle\" and \"phandle\" properties",
"\n\tEnable/disable warnings (prefix with \"no-\")",
"\n\tEnable/disable errors (prefix with \"no-\")",
+ "\n\tUse schema file"
"\n\tPrint this help and exit",
"\n\tPrint version and exit",
NULL,
@@ -105,10 +108,12 @@ static const char * const usage_opts_help[] = {
int main(int argc, char *argv[])
{
struct boot_info *bi;
+ struct boot_info *bi_schema;
const char *inform = "dts";
const char *outform = "dts";
const char *outname = "-";
const char *depname = NULL;
+ const char *schema = NULL;
bool force = false, sort = false;
const char *arg;
int opt;
@@ -185,6 +190,10 @@ int main(int argc, char *argv[])
parse_checks_option(false, true, optarg);
break;
+ case 'x':
+ schema = optarg;
+ break;
+
case 'h':
usage(NULL);
default:
@@ -220,6 +229,12 @@ int main(int argc, char *argv[])
else
die("Unknown input format \"%s\"\n", inform);
+ if (schema) {
+ bi_schema = schema_from_source(schema);
+ //dt_to_source(stdout, bi_schema);
+ build_schema_list(bi_schema);
+ }
+
if (depfile) {
fputc('\n', depfile);
fclose(depfile);
diff --git a/dtc.h b/dtc.h
index 9ce9d12..19d2d24 100644
--- a/dtc.h
+++ b/dtc.h
@@ -135,21 +135,43 @@ struct label {
struct label *next;
};
+enum {
+ PROPERTY_DATA,
+ PROPERTY_USE,
+ PROPERTY_REQUIRE,
+ PROPERTY_MATCH,
+};
+
+#define PROPERTY_FLAG_OPTIONAL (1 << 0)
+
struct property {
bool deleted;
char *name;
struct data val;
+ unsigned int type;
+ unsigned int flags;
struct property *next;
struct label *labels;
};
+enum {
+ NODE_DATA,
+ NODE_USE,
+ NODE_REQUIRE,
+};
+
+#define NODE_FLAG_OPTIONAL (1 << 0)
+#define NODE_FLAG_INCOMPLETE (1 << 1)
+
struct node {
bool deleted;
char *name;
struct property *proplist;
struct node *children;
+ int type;
+ unsigned int flags;
struct node *parent;
struct node *next_sibling;
@@ -297,4 +319,8 @@ struct boot_info *dt_from_source(const char *f);
struct boot_info *dt_from_fs(const char *dirname);
+/* Schema source */
+
+struct boot_info *schema_from_source(const char *fname);
+
#endif /* _DTC_H */
diff --git a/dtss-lexer.l b/dtss-lexer.l
new file mode 100644
index 0000000..aee41f6
--- /dev/null
+++ b/dtss-lexer.l
@@ -0,0 +1,291 @@
+/*
+ * (C) Copyright David Gibson <dwg@xxxxxxxxxxx>, IBM Corporation. 2005.
+ *
+ *
+ * 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 noinput never-interactive prefix="dtss_yy"
+
+%x INCLUDE
+%x BYTESTRING
+%x PROPNODENAME
+%s V1
+
+PROPNODECHAR [a-zA-Z0-9,._+*$#?^@-]
+PATHCHAR ({PROPNODECHAR}|[/])
+LABEL [a-zA-Z_][a-zA-Z0-9_]*
+STRING \"([^\\"]|\\.)*\"
+CHAR_LITERAL '([^']|\\')*'
+WS [[:space:]]
+COMMENT "/*"([^*]|\*+[^*/])*\*+"/"
+LINECOMMENT "//".*\n
+
+%{
+#include "dtc.h"
+#include "srcpos.h"
+
+#define DTSS_YYLTYPE struct srcpos
+
+#include "dtss-parser.tab.h"
+
+DTSS_YYLTYPE dtss_yylloc;
+extern bool treesource_error;
+
+/* CAUTION: this will stop working if we ever use dtss_yyless() or dtss_yyunput() */
+#define YY_USER_ACTION \
+ { \
+ srcpos_update(&dtss_yylloc, dtss_yytext, dtss_yyleng); \
+ }
+
+/* #define LEXDEBUG 1 */
+
+#ifdef LEXDEBUG
+#define DPRINT(fmt, ...) fprintf(stderr, fmt, ##__VA_ARGS__)
+#else
+#define DPRINT(fmt, ...) do { } while (0)
+#endif
+
+static int dts_version = 1;
+
+#define BEGIN_DEFAULT() DPRINT("<V1>\n"); \
+ BEGIN(V1); \
+
+static void push_input_file(const char *filename);
+static bool pop_input_file(void);
+static void lexical_error(const char *fmt, ...);
+%}
+
+%%
+<*>"/include/"{WS}*{STRING} {
+ char *name = strchr(dtss_yytext, '\"') + 1;
+ dtss_yytext[dtss_yyleng-1] = '\0';
+ push_input_file(name);
+ }
+
+<*>^"#"(line)?[ \t]+[0-9]+[ \t]+{STRING}([ \t]+[0-9]+)? {
+ char *line, *tmp, *fn;
+ /* skip text before line # */
+ line = dtss_yytext;
+ while (!isdigit(*line))
+ line++;
+ /* skip digits in line # */
+ tmp = line;
+ while (!isspace(*tmp))
+ tmp++;
+ /* "NULL"-terminate line # */
+ *tmp = '\0';
+ /* start of filename */
+ fn = strchr(tmp + 1, '"') + 1;
+ /* strip trailing " from filename */
+ tmp = strchr(fn, '"');
+ *tmp = 0;
+ /* -1 since #line is the number of the next line */
+ srcpos_set_line(xstrdup(fn), atoi(line) - 1);
+ }
+
+<*><<EOF>> {
+ if (!pop_input_file()) {
+ yyterminate();
+ }
+ }
+
+<*>{STRING} {
+ DPRINT("String: %s\n", dtss_yytext);
+ dtss_yylval.data = data_copy_escape_string(dtss_yytext+1,
+ dtss_yyleng-2);
+ return DT_STRING;
+ }
+
+<*>"/dtss-v1/" {
+ DPRINT("Keyword: /dtss-v1/\n");
+ dts_version = 0x8001;
+ BEGIN_DEFAULT();
+ return DTSS_V1;
+ }
+
+<*>"/bits/" {
+ DPRINT("Keyword: /bits/\n");
+ BEGIN_DEFAULT();
+ return DT_BITS;
+ }
+
+<*>"/delete-property/" {
+ DPRINT("Keyword: /delete-property/\n");
+ DPRINT("<PROPNODENAME>\n");
+ BEGIN(PROPNODENAME);
+ return DT_DEL_PROP;
+ }
+
+<*>"/delete-node/" {
+ DPRINT("Keyword: /delete-node/\n");
+ DPRINT("<PROPNODENAME>\n");
+ BEGIN(PROPNODENAME);
+ return DT_DEL_NODE;
+ }
+
+<*>"/match/" {
+ DPRINT("Keyword: /match/\n");
+ return DTSS_MATCH;
+ }
+
+<*>"/require/" {
+ DPRINT("Keyword: /require/\n");
+ return DTSS_REQUIRE;
+ }
+
+<*>"/use/" {
+ DPRINT("Keyword: /use/\n");
+ return DTSS_USE;
+ }
+
+<*>"/incomplete/" {
+ DPRINT("Keyword: /incomplete/\n");
+ return DTSS_INCOMPLETE;
+ }
+
+<*>"/optional/" {
+ DPRINT("Keyword: /optional/\n");
+ return DTSS_OPTIONAL;
+ }
+
+<V1>([0-9]+|0[xX][0-9a-fA-F]+)(U|L|UL|LL|ULL)? {
+ char *e;
+ DPRINT("Integer Literal: '%s'\n", yytext);
+
+ errno = 0;
+ dtss_yylval.integer = strtoull(yytext, &e, 0);
+
+ assert(!(*e) || !e[strspn(e, "UL")]);
+
+ if (errno == ERANGE)
+ lexical_error("Integer literal '%s' out of range",
+ yytext);
+ else
+ /* ERANGE is the only strtoull error triggerable
+ * by strings matching the pattern */
+ assert(errno == 0);
+ return DT_LITERAL;
+ }
+
+<*>{CHAR_LITERAL} {
+ struct data d;
+ DPRINT("Character literal: %s\n", yytext);
+
+ d = data_copy_escape_string(yytext+1, yyleng-2);
+ if (d.len == 1) {
+ lexical_error("Empty character literal");
+ dtss_yylval.integer = 0;
+ return DT_CHAR_LITERAL;
+ }
+
+ dtss_yylval.integer = (unsigned char)d.val[0];
+
+ if (d.len > 2)
+ lexical_error("Character literal has %d"
+ " characters instead of 1",
+ d.len - 1);
+
+ return DT_CHAR_LITERAL;
+ }
+
+<*>\&{LABEL} { /* label reference */
+ DPRINT("Ref: %s\n", dtss_yytext+1);
+ dtss_yylval.labelref = xstrdup(dtss_yytext+1);
+ return DT_REF;
+ }
+
+<*>"&{/"{PATHCHAR}*\} { /* new-style path reference */
+ dtss_yytext[dtss_yyleng-1] = '\0';
+ DPRINT("Ref: %s\n", dtss_yytext+2);
+ dtss_yylval.labelref = xstrdup(dtss_yytext+2);
+ return DT_REF;
+ }
+
+<BYTESTRING>[0-9a-fA-F]{2} {
+ dtss_yylval.byte = strtol(dtss_yytext, NULL, 16);
+ DPRINT("Byte: %02x\n", (int)dtss_yylval.byte);
+ return DT_BYTE;
+ }
+
+<BYTESTRING>"]" {
+ DPRINT("/BYTESTRING\n");
+ BEGIN_DEFAULT();
+ return ']';
+ }
+
+<PROPNODENAME>\\?{PROPNODECHAR}+ {
+ DPRINT("PropNodeName: %s\n", dtss_yytext);
+ dtss_yylval.propnodename = xstrdup((dtss_yytext[0] == '\\') ?
+ dtss_yytext + 1 : dtss_yytext);
+ BEGIN_DEFAULT();
+ return DT_PROPNODENAME;
+ }
+
+<*>{WS}+ /* eat whitespace */
+<*>{COMMENT}+ /* eat C-style comments */
+<*>{LINECOMMENT}+ /* eat C++-style comments */
+
+<*>. {
+ DPRINT("Char: %c (\\x%02x)\n", dtss_yytext[0],
+ (unsigned)dtss_yytext[0]);
+ if (dtss_yytext[0] == '[') {
+ DPRINT("<BYTESTRING>\n");
+ BEGIN(BYTESTRING);
+ }
+ if ((dtss_yytext[0] == '{')
+ || (dtss_yytext[0] == ';')) {
+ DPRINT("<PROPNODENAME>\n");
+ BEGIN(PROPNODENAME);
+ }
+ return dtss_yytext[0];
+ }
+
+%%
+
+static void push_input_file(const char *filename)
+{
+ assert(filename);
+
+ srcfile_push(filename);
+
+ dtss_yyin = current_srcfile->f;
+
+ dtss_yypush_buffer_state(dtss_yy_create_buffer(dtss_yyin, YY_BUF_SIZE));
+}
+
+
+static bool pop_input_file(void)
+{
+ if (srcfile_pop() == 0)
+ return false;
+
+ dtss_yypop_buffer_state();
+ dtss_yyin = current_srcfile->f;
+
+ return true;
+}
+
+static void lexical_error(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ srcpos_verror(&dtss_yylloc, "Lexical error", fmt, ap);
+ va_end(ap);
+
+ treesource_error = true;
+}
diff --git a/dtss-parser.y b/dtss-parser.y
new file mode 100644
index 0000000..1c807da
--- /dev/null
+++ b/dtss-parser.y
@@ -0,0 +1,341 @@
+/*
+ * (C) Copyright David Gibson <dwg@xxxxxxxxxxx>, IBM Corporation. 2005.
+ *
+ *
+ * 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
+ */
+
+%define api.prefix dtss_yy
+
+%{
+#include <stdio.h>
+
+#include "dtc.h"
+#include "srcpos.h"
+
+#define DTSS_YYLTYPE struct srcpos
+
+extern int dtss_yylex(void);
+extern void dtss_yyerror(char const *s);
+#define ERROR(loc, ...) \
+ do { \
+ srcpos_error((loc), "Error", __VA_ARGS__); \
+ treesource_error = true; \
+ } while (0)
+
+extern struct boot_info *the_boot_info;
+extern bool treesource_error;
+%}
+
+%union {
+ char *propnodename;
+ char *labelref;
+ unsigned int cbase;
+ uint8_t byte;
+ struct data data;
+
+ struct {
+ struct data data;
+ int bits;
+ } array;
+
+ struct property *prop;
+ struct property *proplist;
+ struct node *node;
+ struct node *nodelist;
+ struct reserve_info *re;
+ uint64_t integer;
+}
+
+%token DTSS_V1
+%token DT_BITS
+%token DT_DEL_PROP
+%token DT_DEL_NODE
+%token DTSS_INCOMPLETE
+%token DTSS_MATCH
+%token DTSS_USE
+%token DTSS_REQUIRE
+%token DTSS_OPTIONAL
+%token <propnodename> DT_PROPNODENAME
+%token <integer> DT_LITERAL
+%token <integer> DT_CHAR_LITERAL
+%token <cbase> DT_BASE
+%token <byte> DT_BYTE
+%token <data> DT_STRING
+%token <data> DTSS_TYPESPEC
+%token <labelref> DT_LABEL
+%token <labelref> DT_REF
+%token DT_INCBIN
+
+%type <data> propdata
+%type <data> propdataprefix
+%type <array> arrayprefix
+%type <data> bytestring
+%type <prop> propdef
+%type <proplist> proplist
+
+%type <node> schema
+%type <node> schemaroot
+%type <node> nodedef
+%type <node> subnode
+%type <nodelist> subnodes
+
+%type <integer> integer_prim
+
+%%
+
+sourcefile:
+ DTSS_V1 ';' schema
+ {
+ the_boot_info = build_boot_info(NULL, $3, 0);
+ }
+ ;
+
+schemaroot:
+ subnodes
+ {
+ $$ = build_node(NULL, $1);
+ }
+ ;
+
+schema:
+ schemaroot
+ {
+ $$ = name_node($1, "/");
+ }
+ ;
+
+nodedef:
+ '{' proplist subnodes '}' ';'
+ {
+ $$ = build_node($2, $3);
+ }
+ ;
+
+proplist:
+ /* empty */
+ {
+ $$ = NULL;
+ }
+ | proplist propdef
+ {
+ $$ = chain_property($2, $1);
+ }
+ ;
+
+propdef:
+ DT_PROPNODENAME '=' propdata ';'
+ {
+ $$ = build_property($1, $3);
+ }
+ | DT_PROPNODENAME ';'
+ {
+ $$ = build_property($1, empty_data);
+ }
+ | DT_DEL_PROP DT_PROPNODENAME ';'
+ {
+ $$ = build_property_delete($2);
+ }
+ | DTSS_MATCH propdef
+ {
+ $2->type = PROPERTY_MATCH;
+ $$ = $2;
+ }
+ | DTSS_USE propdef
+ {
+ $2->type = PROPERTY_USE;
+ $$ = $2;
+ }
+ | DTSS_REQUIRE propdef
+ {
+ $2->type = PROPERTY_REQUIRE;
+ $$ = $2;
+ }
+ | DTSS_OPTIONAL propdef
+ {
+ $2->flags |= PROPERTY_FLAG_OPTIONAL;
+ $$ = $2;
+ }
+ ;
+
+propdata:
+ propdataprefix DT_STRING
+ {
+ $$ = data_merge($1, $2);
+ }
+ | propdataprefix arrayprefix '>'
+ {
+ $$ = data_merge($1, $2.data);
+ }
+ | propdataprefix '[' bytestring ']'
+ {
+ $$ = data_merge($1, $3);
+ }
+ | propdataprefix DT_INCBIN '(' DT_STRING ',' integer_prim ',' integer_prim ')'
+ {
+ FILE *f = srcfile_relative_open($4.val, NULL);
+ struct data d;
+
+ if ($6 != 0)
+ if (fseek(f, $6, SEEK_SET) != 0)
+ die("Couldn't seek to offset %llu in \"%s\": %s",
+ (unsigned long long)$6, $4.val,
+ strerror(errno));
+
+ d = data_copy_file(f, $8);
+
+ $$ = data_merge($1, d);
+ fclose(f);
+ }
+ | propdataprefix DT_INCBIN '(' DT_STRING ')'
+ {
+ FILE *f = srcfile_relative_open($4.val, NULL);
+ struct data d = empty_data;
+
+ d = data_copy_file(f, -1);
+
+ $$ = data_merge($1, d);
+ fclose(f);
+ }
+ ;
+
+propdataprefix:
+ /* empty */
+ {
+ $$ = empty_data;
+ }
+ | propdata ','
+ {
+ $$ = $1;
+ }
+ | propdataprefix DT_LABEL
+ {
+ $$ = data_add_marker($1, LABEL, $2);
+ }
+ ;
+
+arrayprefix:
+ DT_BITS DT_LITERAL '<'
+ {
+ unsigned long long bits;
+
+ bits = $2;
+
+ if ((bits != 8) && (bits != 16) &&
+ (bits != 32) && (bits != 64)) {
+ ERROR(&@2, "Array elements must be"
+ " 8, 16, 32 or 64-bits");
+ bits = 32;
+ }
+
+ $$.data = empty_data;
+ $$.bits = bits;
+ }
+ | '<'
+ {
+ $$.data = empty_data;
+ $$.bits = 32;
+ }
+ | arrayprefix integer_prim
+ {
+ if ($1.bits < 64) {
+ uint64_t mask = (1ULL << $1.bits) - 1;
+ /*
+ * Bits above mask must either be all zero
+ * (positive within range of mask) or all one
+ * (negative and sign-extended). The second
+ * condition is true if when we set all bits
+ * within the mask to one (i.e. | in the
+ * mask), all bits are one.
+ */
+ if (($2 > mask) && (($2 | mask) != -1ULL))
+ ERROR(&@2, "Value out of range for"
+ " %d-bit array element", $1.bits);
+ }
+
+ $$.data = data_append_integer($1.data, $2, $1.bits);
+ }
+ ;
+
+integer_prim:
+ DT_LITERAL
+ | DT_CHAR_LITERAL
+ ;
+
+bytestring:
+ /* empty */
+ {
+ $$ = empty_data;
+ }
+ | bytestring DT_BYTE
+ {
+ $$ = data_append_byte($1, $2);
+ }
+ ;
+
+subnodes:
+ /* empty */
+ {
+ $$ = NULL;
+ }
+ | subnode subnodes
+ {
+ $$ = chain_node($1, $2);
+ }
+ | subnode propdef
+ {
+ ERROR(&@2, "Properties must precede subnodes");
+ YYERROR;
+ }
+ ;
+
+subnode:
+ DT_PROPNODENAME nodedef
+ {
+ $$ = name_node($2, $1);
+ }
+ | DT_DEL_NODE DT_PROPNODENAME ';'
+ {
+ $$ = name_node(build_node_delete(), $2);
+ }
+ | DTSS_USE subnode
+ {
+ $2->type = NODE_USE;
+ $$ = $2;
+ }
+ | DTSS_REQUIRE subnode
+ {
+ $2->type = NODE_REQUIRE;
+ $$ = $2;
+ }
+ | DTSS_OPTIONAL subnode
+ {
+ $2->flags |= NODE_FLAG_OPTIONAL;
+ $$ = $2;
+ }
+ | DTSS_INCOMPLETE subnode
+ {
+ $2->flags |= NODE_FLAG_INCOMPLETE;
+ $$ = $2;
+ }
+ ;
+
+%%
+
+void dtss_yyerror(char const *s)
+{
+ ERROR(&yylloc, "%s", s);
+}
diff --git a/schemas/schema.c b/schemas/schema.c
new file mode 100644
index 0000000..e5258cf
--- /dev/null
+++ b/schemas/schema.c
@@ -0,0 +1,311 @@
+/*
+ * Copyright (C) 2013 Stephen Warren <swarren@xxxxxxxxxxxxx>
+ *
+ * Copyright (C) 2014 Samsung Electronics Co., Ltd.
+ * Tomasz Figa <t.figa@xxxxxxxxxxx>
+ *
+ * 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
+ */
+
+#include "schema.h"
+
+static struct schema_checker schema_list = {
+ .next = &schema_list,
+};
+
+int schema_check_node(struct node *root, struct node *node)
+{
+ const struct schema_checker *checker;
+ int match;
+ int checked = 0;
+
+ checker = schema_list.next;
+ for (; checker != &schema_list; checker = checker->next) {
+ match = checker->matchfn(node, checker);
+ if (!match)
+ continue;
+
+ pr_info("Node %s matches checker %s at level %d\n",
+ node->fullpath, checker->name, match);
+
+ checker->checkfn(root, node, checker);
+ checked = 1;
+ }
+
+ /*
+ * FIXME: this is too noisy right now. Make it optional until schemas
+ * for most bindings are implemented.
+ */
+ if (!checked) {
+ pr_warn("no schema for node %s\n", node->fullpath);
+ return 0;
+ }
+
+ /*
+ * FIXME: grab validation state from global somewhere.
+ * Using global state avoids having check return values after every
+ * function call, thus making the code less verbose and appear more
+ * assertion-based.
+ */
+ return 0;
+}
+
+int schema_match_path(struct node *node, const struct schema_checker *checker)
+{
+ return !strcmp(node->fullpath, checker->u.path.path);
+}
+
+int schema_match_compatible(struct node *node,
+ const struct schema_checker *checker)
+{
+ struct property *compat_prop;
+ int index;
+ const char *node_compat;
+ const char **test_compats;
+
+ compat_prop = get_property(node, "compatible");
+ if (!compat_prop)
+ return 0;
+
+ /*
+ * Match with any compatible value of schema with any compatible
+ * value of node being verified.
+ */
+ for (node_compat = compat_prop->val.val, index = 0;
+ *node_compat;
+ node_compat += strlen(node_compat) + 1, index++) {
+ for (test_compats = checker->u.compatible.compats;
+ *test_compats; test_compats++) {
+ if (!strcmp(node_compat, *test_compats))
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+struct property *schema_get_param(struct node *params, const char *name)
+{
+ if (!params)
+ return NULL;
+
+ return get_property(params, name);
+}
+
+int schema_get_param_cell(struct node *params, const char *name, cell_t *val)
+{
+ struct property *prop;
+
+ prop = schema_get_param(params, name);
+ if (!prop)
+ return -ENOENT;
+
+ if (!prop->val.len)
+ return -EINVAL;
+
+ *val = propval_cell(prop);
+ return 0;
+}
+
+struct property *require_property(struct node *node, const char *name)
+{
+ struct property *prop;
+
+ prop = get_property(node, name);
+ if (!prop) {
+ /*
+ * FIXME: set global error state. The same comment applies
+ * everywhere.
+ */
+ pr_err("node '%s' missing '%s' property\n",
+ node->fullpath, name);
+ }
+
+ return prop;
+}
+
+static void check_required_property(struct node *node, struct property *schema)
+{
+ struct property *prop;
+
+ prop = require_property(node, schema->name);
+ if (!prop)
+ return;
+
+ if (schema->val.len
+ && (schema->val.len != prop->val.len
+ || memcmp(schema->val.val, prop->val.val, prop->val.len)))
+ pr_err("node %s with wrong constant value of property %s\n",
+ node->fullpath, schema->name);
+}
+
+static void check_optional_property(struct node *node, struct property *schema)
+{
+ struct property *prop;
+
+ prop = get_property(node, schema->name);
+ if (!prop)
+ return;
+
+ check_required_property(node, schema);
+}
+
+/*
+ * FIXME: Use a more generic solution, which does not rely on linker
+ * specific features.
+ */
+extern const struct generic_schema __start_generic_schemas;
+extern const struct generic_schema __stop_generic_schemas;
+
+static void check_generic_schema(struct node *root, struct node *node,
+ const char *name,
+ struct node *schema_node,
+ bool required)
+{
+ const struct generic_schema *gs;
+ int i;
+ bool checked = false;
+ unsigned int count = &__stop_generic_schemas - &__start_generic_schemas;
+
+ pr_info("running schema \"%s\"\n", name);
+
+ gs = &__start_generic_schemas;
+ for (i = 0; i < count; ++i, ++gs) {
+ if (strcmp(gs->name, name))
+ continue;
+
+ gs->checkfn(gs, root, node, schema_node, required);
+
+ checked = true;
+ }
+
+ if (!checked)
+ pr_err("schema \"%s\" not found\n", name);
+}
+
+static void check_dtss_schema(struct node *root, struct node *node,
+ const struct schema_checker *checker)
+{
+ struct property *prop_schema;
+ struct node *schema = checker->node, *node_schema;
+
+ for_each_property(schema, prop_schema) {
+ if (!strcmp(prop_schema->name, "compatible")
+ || !strcmp(prop_schema->name, "device_type"))
+ continue;
+
+ switch (prop_schema->type) {
+ case PROPERTY_DATA:
+ if (prop_schema->flags & PROPERTY_FLAG_OPTIONAL)
+ check_optional_property(node, prop_schema);
+ else
+ check_required_property(node, prop_schema);
+ break;
+
+ case PROPERTY_REQUIRE:
+ check_generic_schema(root, node, prop_schema->name,
+ NULL, true);
+ break;
+
+ case PROPERTY_USE:
+ check_generic_schema(root, node, prop_schema->name,
+ NULL, false);
+ break;
+ }
+ }
+
+ for_each_child(schema, node_schema) {
+ switch (node_schema->type) {
+ case NODE_DATA:
+ /* TODO: verify subnodes */
+ break;
+
+ case NODE_REQUIRE:
+ check_generic_schema(root, node, node_schema->name,
+ node_schema, true);
+ break;
+
+ case NODE_USE:
+ check_generic_schema(root, node, node_schema->name,
+ node_schema, false);
+ break;
+ }
+ }
+
+ /* TODO: detect unknown properties */
+}
+
+void build_schema_list(struct boot_info *schema_tree)
+{
+ struct node *root, *schema;
+
+ root = get_node_by_path(schema_tree->dt, "/");
+ if (!root) {
+ pr_err("schema file missing / node\n");
+ return;
+ }
+
+ for_each_child(root, schema) {
+ struct schema_checker *sc = xmalloc(sizeof(*sc));
+ struct property *prop;
+
+ sc->node = schema;
+ sc->checkfn = check_dtss_schema;
+ sc->name = schema->name;
+
+ for_each_property(schema, prop)
+ if (prop->type == PROPERTY_MATCH)
+ goto found_match;
+
+ pr_err("schema '%s' without matching key\n", sc->name);
+ free(sc);
+ continue;
+
+found_match:
+ if (!strcmp(prop->name, "compatible")) {
+ int count;
+ const char **compats;
+ const char *compat;
+
+ count = propval_string_count(schema, prop) + 1;
+ compats = xmalloc(count * sizeof(*compats));
+
+ sc->u.compatible.compats = compats;
+
+ while ((compat = propval_next_string(prop, compat))) {
+ *compats = compat;
+ ++compats;
+ }
+ *compats = NULL;
+
+ sc->matchfn = schema_match_compatible;
+ sc->next = schema_list.next;
+ schema_list.next = sc;
+ } else if (!strcmp(prop->name, "device_type")) {
+ sc->u.type.type = propval_next_string(prop, NULL);
+ sc->next = schema_list.next;
+ schema_list.next = sc;
+ } else if (!strcmp(prop->name, "path")) {
+ sc->u.path.path = propval_next_string(prop, NULL);
+ sc->matchfn = schema_match_path;
+ sc->next = schema_list.next;
+ schema_list.next = sc;
+ } else {
+ pr_err("wrong schema key type\n");
+ free(sc);
+ }
+ }
+}
diff --git a/schemas/schema.h b/schemas/schema.h
new file mode 100644
index 0000000..9972a17
--- /dev/null
+++ b/schemas/schema.h
@@ -0,0 +1,89 @@
+#ifndef _SCHEMAS_SCHEMA_H
+#define _SCHEMAS_SCHEMA_H
+
+#include "dtc.h"
+
+struct schema_checker;
+
+typedef int (schema_matcher_func)(struct node *node,
+ const struct schema_checker *checker);
+typedef void (schema_checker_func)(struct node *root, struct node *node,
+ const struct schema_checker *checker);
+
+struct schema_checker {
+ const char *name;
+ schema_matcher_func *matchfn;
+ schema_checker_func *checkfn;
+ struct node *node;
+ union {
+ struct {
+ const char *path;
+ } path;
+ struct {
+ const char **compats;
+ } compatible;
+ struct {
+ const char *type;
+ } type;
+ } u;
+ struct schema_checker *next;
+};
+
+int schema_check_node(struct node *root, struct node *node);
+
+int schema_match_path(struct node *node, const struct schema_checker *checker);
+int schema_match_compatible(struct node *node,
+ const struct schema_checker *checker);
+
+#define SCHEMA_MATCH_PATH(_name_, _path_) \
+ struct schema_checker schema_checker_##_name_ = { \
+ .name = #_name_, \
+ .matchfn = schema_match_path, \
+ .checkfn = checkfn_##_name_, \
+ .u.path.path = _path_, \
+ };
+
+#define SCHEMA_MATCH_COMPATIBLE(_name_) \
+ struct schema_checker schema_checker_##_name_ = { \
+ .name = #_name_, \
+ .matchfn = schema_match_compatible, \
+ .checkfn = checkfn_##_name_, \
+ .u.compatible.compats = compats_##_name_, \
+ };
+
+struct generic_schema;
+
+typedef void (generic_schema_checker_func)(const struct generic_schema *schema,
+ struct node *root, struct node *node,
+ struct node *params, bool required);
+
+struct generic_schema {
+ const char *name;
+ generic_schema_checker_func *checkfn;
+};
+
+#define __used __attribute__((__used__))
+#define __section(S) __attribute__ ((__section__(#S)))
+
+#define GENERIC_SCHEMA(_dt_name_, _name_) \
+ static const struct generic_schema generic_schema_##_name_ \
+ __used __section(generic_schemas) = { \
+ .name = _dt_name_, \
+ .checkfn = generic_checkfn_##_name_, \
+ };
+
+struct property *require_property(struct node *node, const char *propname);
+struct property *schema_get_param(struct node *params, const char *name);
+int schema_get_param_cell(struct node *params, const char *name, cell_t *val);
+
+void build_schema_list(struct boot_info *schema_tree);
+
+#define schema_err(s,fmt,args...) pr_err("%s: " fmt, (s)->name, ##args)
+#define schema_warn(s,fmt,args...) pr_warn("%s: " fmt, (s)->name, ##args)
+#define schema_info(s,fmt,args...) pr_info("%s: " fmt, (s)->name, ##args)
+
+#define node_err(n,fmt,args...) pr_err("%s: " fmt, (n)->fullpath, ##args)
+#define node_warn(n,fmt,args...) pr_warn("%s: " fmt, (n)->fullpath, ##args)
+#define node_info(n,fmt,args...) pr_info("%s: " fmt, (n)->fullpath, ##args)
+
+#endif
diff --git a/srcpos.h b/srcpos.h
index f81827b..b761522 100644
--- a/srcpos.h
+++ b/srcpos.h
@@ -75,7 +75,9 @@ struct srcpos {
struct srcfile_state *file;
};
+#ifndef YYLTYPE
#define YYLTYPE struct srcpos
+#endif
#define YYLLOC_DEFAULT(Current, Rhs, N) \
do { \
diff --git a/treesource.c b/treesource.c
index bf7a626..e50285c 100644
--- a/treesource.c
+++ b/treesource.c
@@ -25,6 +25,10 @@ extern FILE *yyin;
extern int yyparse(void);
extern YYLTYPE yylloc;
+extern FILE *dtss_yyin;
+extern int dtss_yyparse(void);
+extern YYLTYPE dtss_yylloc;
+
struct boot_info *the_boot_info;
bool treesource_error;
@@ -46,6 +50,24 @@ struct boot_info *dt_from_source(const char *fname)
return the_boot_info;
}
+struct boot_info *schema_from_source(const char *fname)
+{
+ the_boot_info = NULL;
+ treesource_error = false;
+
+ srcfile_push(fname);
+ dtss_yyin = current_srcfile->f;
+ dtss_yylloc.file = current_srcfile;
+
+ if (dtss_yyparse() != 0)
+ die("Unable to parse input tree\n");
+
+ if (treesource_error)
+ die("Syntax error parsing input tree\n");
+
+ return the_boot_info;
+}
+
static void write_prefix(FILE *f, int level)
{
int i;
--
1.8.5.2
--
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