Split C code in sconfig's parser into a separate file.

Update generated parser files.
Add proper include path for utils.

Signed-off-by: Patrick Georgi <patrick.georgi@coresystems.de>
Acked-by: Peter Stuge <peter@stuge.se>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5523 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

7 files changed, 549 insertions, 892 deletions

diff --git a/Makefile b/Makefile
index 05b41d123f..708e3c3ea4 100644
--- a/Makefile
+++ b/Makefile
@@ -170,7 +170,7 @@ $(obj)/mainboard/$(MAINBOARDDIR)/static.c: $(src)/mainboard/$(MAINBOARDDIR)/devi
 
 $(objutil)/%.o: $(objutil)/%.c
 	@printf "    HOSTCC     $(subst $(objutil)/,,$(@))\n"
-	$(HOSTCC) -MMD $(HOSTCFLAGS) -c -o $@ $<
+	$(HOSTCC) -MMD -I$(subst $(objutil)/,util/,$(dir $<)) -I$(dir $<) $(HOSTCFLAGS) -c -o $@ $<
 
 $(obj)/%.o: $(obj)/%.c $(obj)/config.h
 	@printf "    CC         $(subst $(obj)/,,$(@))\n"
diff --git a/util/sconfig/Makefile.inc b/util/sconfig/Makefile.inc
index aa2ce7ad8e..a1ee64da88 100644
--- a/util/sconfig/Makefile.inc
+++ b/util/sconfig/Makefile.inc
@@ -1,10 +1,17 @@
 sconfigobj :=
 sconfigobj += lex.yy.o
 sconfigobj += sconfig.tab.o
+sconfigobj += main.o
+
+SCONFIGFLAGS += -I$(top)/util/sconfig -I$(objutil)/sconfig
 
 $(objutil)/sconfig:
 	mkdir -p $@
 
+$(objutil)/sconfig/%.o: util/sconfig/%.c
+	printf "    HOSTCC     $(subst $(obj)/,,$(@))\n"
+	$(HOSTCC) $(SCONFIGFLAGS) $(HOSTCFLAGS) -c -o $@ $<
+
 $(objutil)/sconfig/%.o: $(objutil)/sconfig/%.c
 	printf "    HOSTCC     $(subst $(obj)/,,$(@))\n"
 	$(HOSTCC) $(SCONFIGFLAGS) $(HOSTCFLAGS) -c -o $@ $<
diff --git a/util/sconfig/main.c b/util/sconfig/main.c
new file mode 100755
index 0000000000..00d0e5a5b2
--- /dev/null
+++ b/util/sconfig/main.c
@@ -0,0 +1,417 @@
+/*
+ * sconfig, coreboot device tree compiler
+ *
+ * Copyright (C) 2010 coresystems GmbH
+ *                 written by Patrick Georgi <patrick.georgi@coresystems.de>
+ *
+ * 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; version 2 of the License.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ */
+
+#include "sconfig.h"
+#include "sconfig.tab.h"
+
+struct device *head, *lastdev;
+
+struct header headers;
+
+static int devcount = 0;
+
+static struct device root;
+static struct device mainboard = {
+	.name = "mainboard",
+	.name_underscore = "mainboard",
+	.id = 0,
+	.chip = &mainboard,
+	.type = chip,
+	.chiph_exists = 1,
+	.children = &root
+};
+
+static struct device root = {
+	.name = "dev_root",
+	.name_underscore = "dev_root",
+	.id = 0,
+	.chip = &mainboard,
+	.type = device,
+	.path = " .type = DEVICE_PATH_ROOT ",
+	.ops = "&default_dev_ops_root",
+	.parent = &root,
+	.bus = &root,
+	.enabled = 1
+};
+
+static struct device *new_dev() {
+	struct device *dev = malloc(sizeof(struct device));
+	memset(dev, 0, sizeof(struct device));
+	dev->id = ++devcount;
+	dev->parent = cur_parent;
+	dev->bus = cur_bus;
+	head->next = dev;
+	head = dev;
+	return dev;
+}
+
+static int device_match(struct device *a, struct device *b) {
+	if ((a->bustype == b->bustype) && (a->bus == b->bus) && (a->path_a == b->path_a) && (a->path_b == b->path_b))
+		return 1;
+	return 0;
+}
+
+void fold_in(struct device *parent) {
+	struct device *child = parent->children;
+	struct device *latest = 0;
+	while (child != latest) {
+		if (child->children) {
+			if (!latest) latest = child->children;
+			parent->latestchild->next_sibling = child->children;
+			parent->latestchild = child->latestchild;
+		}
+		child = child->next_sibling;
+	}
+}
+
+int yywrap(void) {
+	return 1;
+}
+
+void yyerror (char const *str)
+{
+	fprintf (stderr, "%s\n", str);
+}
+
+void postprocess_devtree(void) {
+	root.next_sibling = root.children;
+	root.next_sibling->next_sibling = root.next_sibling->children;
+
+	struct device *dev = &root;
+	while (dev) {
+		/* skip "chip" elements in children chain */
+		while (dev->children && (dev->children->type == chip)) dev->children = dev->children->children;
+		/* skip "chip" elements and functions of the same device in sibling chain */
+		while (dev->sibling && dev->sibling->used) dev->sibling = dev->sibling->sibling;
+		/* If end of chain, and parent is a chip, move on */
+		if (!dev->sibling && (dev->parent->type == chip)) dev->sibling = dev->parent->sibling;
+		/* skip chips */
+		while (dev->sibling && dev->sibling->type == chip) dev->sibling = dev->sibling->children;
+		/* skip duplicate function elements in nextdev chain */
+		while (dev->nextdev && dev->nextdev->used) dev->nextdev = dev->nextdev->nextdev;
+		dev = dev->next_sibling;
+	}
+}
+
+struct device *new_chip(char *path) {
+	struct device *new_chip = new_dev();
+	new_chip->chiph_exists = 1;
+	new_chip->name = path;
+	new_chip->name_underscore = strdup(new_chip->name);
+	char *c;
+	for (c = new_chip->name_underscore; *c; c++) {
+		if (*c == '/') *c = '_';
+		if (*c == '-') *c = '_';
+	}
+	new_chip->type = chip;
+	new_chip->chip = new_chip;
+
+	struct stat st;
+	char *chip_h = malloc(strlen(path)+12);
+	sprintf(chip_h, "src/%s/chip.h", path);
+	if ((stat(chip_h, &st) == -1) && (errno == ENOENT))
+		new_chip->chiph_exists = 0;
+
+	if (cur_parent->latestchild) {
+		cur_parent->latestchild->next_sibling = new_chip;
+		cur_parent->latestchild->sibling = new_chip;
+	}
+	cur_parent->latestchild = new_chip;
+	if (!cur_parent->children)
+		cur_parent->children = new_chip;
+	return new_chip;
+}
+
+void add_header(struct device *dev) {
+	if (dev->chiph_exists) {
+		int include_exists = 0;
+		struct header *h = &headers;
+		while (h->next) {
+			int result = strcmp(dev->name, h->next->name);
+			if (result == 0) {
+				include_exists = 1;
+				break;
+			}
+			if (result < 0) break;
+			h = h->next;
+		}
+		if (!include_exists) {
+			struct header *tmp = h->next;
+			h->next = malloc(sizeof(struct header));
+			memset(h->next, 0, sizeof(struct header));
+			h->next->name = dev->name;
+			h->next->next = tmp;
+		}
+	}
+}
+
+struct device *new_device(const int bus, const char *devnum, int enabled) {
+	struct device *new_d = new_dev();
+	new_d->bustype = bus;
+
+	char *tmp;
+	new_d->path_a = strtol(strdup(devnum), &tmp, 16);
+	if (*tmp == '.') {
+		tmp++;
+		new_d->path_b = strtol(tmp, NULL, 16);
+	}
+
+	char *name = malloc(10);
+	sprintf(name, "_dev%d", new_d->id);
+	new_d->name = name;
+	new_d->name_underscore = name; // shouldn't be necessary, but avoid 0-ptr
+	new_d->type = device;
+	new_d->enabled = enabled;
+	new_d->chip = new_d->parent->chip;
+
+	if (cur_parent->latestchild) {
+		cur_parent->latestchild->next_sibling = new_d;
+		cur_parent->latestchild->sibling = new_d;
+	}
+	cur_parent->latestchild = new_d;
+	if (!cur_parent->children)
+		cur_parent->children = new_d;
+
+	lastdev->nextdev = new_d;
+	lastdev = new_d;
+	if (bus == PCI) {
+		new_d->path = ".type=DEVICE_PATH_PCI,{.pci={ .devfn = PCI_DEVFN(0x%x,%d)}}";
+	}
+	if (bus == PNP) {
+		new_d->path = ".type=DEVICE_PATH_PNP,{.pnp={ .port = 0x%x, .device = 0x%x }}";
+	}
+	if (bus == I2C) {
+		new_d->path = ".type=DEVICE_PATH_I2C,{.i2c={ .device = 0x%x }}";
+	}
+	if (bus == APIC) {
+		new_d->path = ".type=DEVICE_PATH_APIC,{.apic={ .apic_id = 0x%x }}";
+	}
+	if (bus == APIC_CLUSTER) {
+		new_d->path = ".type=DEVICE_PATH_APIC_CLUSTER,{.apic_cluster={ .cluster = 0x%x }}";
+	}
+	if (bus == PCI_DOMAIN) {
+		new_d->path = ".type=DEVICE_PATH_PCI_DOMAIN,{.pci_domain={ .domain = 0x%x }}";
+	}
+	return new_d;
+}
+
+void alias_siblings(struct device *d) {
+	while (d) {
+		int link = 0;
+		struct device *cmp = d->next_sibling;
+		while (cmp && (cmp->bus == d->bus) && (cmp->path_a == d->path_a) && (cmp->path_b == d->path_b)) {
+			if (cmp->type==device && !cmp->used) {
+				if (device_match(d, cmp)) {
+					d->multidev = 1;
+
+					cmp->aliased_name = malloc(12);
+					sprintf(cmp->aliased_name, "_dev%d", cmp->id);
+					cmp->id = d->id;
+					cmp->name = d->name;
+					cmp->used = 1;
+					cmp->link = ++link;
+				}
+			}
+			cmp = cmp->next_sibling;
+		}
+		d = d->next_sibling;
+	}
+}
+
+void add_resource(int type, int index, int base) {
+	struct resource *r = malloc(sizeof(struct resource));
+	memset (r, 0, sizeof(struct resource));
+	r->type = type;
+	r->index = index;
+	r->base = base;
+	if (cur_parent->res) {
+		struct resource *head = cur_parent->res;
+		while (head->next) head = head->next;
+		head->next = r;
+	} else {
+		cur_parent->res = r;
+	}
+	cur_parent->rescnt++;
+}
+
+void add_register(char *name, char *val) {
+	struct reg *r = malloc(sizeof(struct reg));
+	memset (r, 0, sizeof(struct reg));
+	r->key = name;
+	r->value = val;
+	if (cur_parent->reg) {
+		struct reg *head = cur_parent->reg;
+		// sorting to be equal to sconfig's behaviour
+		int sort = strcmp(r->key, head->key);
+		if (sort == 0) {
+			printf("ERROR: duplicate 'register' key.\n");
+			exit(1);
+		}
+		if (sort<0) {
+			r->next = head;
+			cur_parent->reg = r;
+		} else {
+			while ((head->next) && (strcmp(head->next->key, r->key)<0)) head = head->next;
+			r->next = head->next;
+			head->next = r;
+		}
+	} else {
+		cur_parent->reg = r;
+	}
+}
+
+static void pass0(FILE *fil, struct device *ptr) {
+	if ((ptr->type == device) && (ptr->id != 0) && (!ptr->used))
+		fprintf(fil, "struct device %s;\n", ptr->name);
+	if ((ptr->type == device) && (ptr->id != 0) && ptr->used)
+		fprintf(fil, "struct device %s;\n", ptr->aliased_name);
+}
+
+static void pass1(FILE *fil, struct device *ptr) {
+	if (!ptr->used && (ptr->type == device)) {
+		fprintf(fil, "struct device %s = {\n", ptr->name);
+		fprintf(fil, "\t.ops = %s,\n", (ptr->ops)?(ptr->ops):"0");
+		fprintf(fil, "\t.bus = &%s.link[%d],\n", ptr->bus->name, ptr->bus->link);
+		fprintf(fil, "\t.path = {");
+		fprintf(fil, ptr->path, ptr->path_a, ptr->path_b);
+		fprintf(fil, "},\n");
+		fprintf(fil, "\t.enabled = %d,\n", ptr->enabled);
+		fprintf(fil, "\t.on_mainboard = 1,\n");
+		if (ptr->rescnt > 0) {
+			fprintf(fil, "\t.resources = %d,\n", ptr->rescnt);
+			fprintf(fil, "\t.resource = {\n");
+			struct resource *r = ptr->res;
+			while (r) {
+				fprintf(fil, "\t\t{ .flags=IORESOURCE_FIXED | IORESOURCE_ASSIGNED | IORESOURCE_");
+				if (r->type == IRQ) fprintf(fil, "IRQ");
+				if (r->type == DRQ) fprintf(fil, "DRQ");
+				if (r->type == IO) fprintf(fil, "IO");
+				fprintf(fil, ", .index=0x%x, .base=0x%x},\n", r->index, r->base);
+				r = r->next;
+			}
+			fprintf(fil, "\t },\n");
+		}
+		int link = 0;
+		fprintf(fil, "\t.link = {\n");
+		if (ptr->multidev) {
+			struct device *d = ptr;
+			while (d) {
+				if (device_match(d, ptr)) {
+					fprintf(fil, "\t\t[%d] = {\n", d->link);
+					fprintf(fil, "\t\t\t.link = %d,\n", d->link);
+					fprintf(fil, "\t\t\t.dev = &%s,\n", d->name);
+					if (d->children)
+						fprintf(fil, "\t\t\t.children = &%s,\n", d->children->name);
+					fprintf(fil, "\t\t},\n");
+					link++;
+				}
+				d = d->next_sibling;
+			}
+		} else {
+			if (ptr->children) {
+				fprintf(fil, "\t\t[0] = {\n");
+				fprintf(fil, "\t\t\t.link = 0,\n");
+				fprintf(fil, "\t\t\t.dev = &%s,\n", ptr->name);
+				fprintf(fil, "\t\t\t.children = &%s,\n", ptr->children->name);
+				fprintf(fil, "\t\t},\n");
+				link++;
+			}
+		}
+		fprintf(fil, "\t},\n");
+		fprintf(fil, "\t.links = %d,\n", link);
+		if (ptr->sibling)
+			fprintf(fil, "\t.sibling = &%s,\n", ptr->sibling->name);
+		if (ptr->chip->chiph_exists) {
+			fprintf(fil, "\t.chip_ops = &%s_ops,\n", ptr->chip->name_underscore);
+			fprintf(fil, "\t.chip_info = &%s_info_%d,\n", ptr->chip->name_underscore, ptr->chip->id);
+		}
+		if (ptr->nextdev)
+			fprintf(fil, "\t.next=&%s\n", ptr->nextdev->name);
+		fprintf(fil, "};\n");
+	}
+	if ((ptr->type == chip) && (ptr->chiph_exists)) {
+		if (ptr->reg) {
+			fprintf(fil, "struct %s_config %s_info_%d\t= {\n", ptr->name_underscore, ptr->name_underscore, ptr->id);
+			struct reg *r = ptr->reg;
+			while (r) {
+				fprintf(fil, "\t.%s = %s,\n", r->key, r->value);
+				r = r->next;
+			}
+			fprintf(fil, "};\n\n");
+		} else {
+			fprintf(fil, "struct %s_config %s_info_%d;\n", ptr->name_underscore, ptr->name_underscore, ptr->id);
+		}
+	}
+}
+
+static void walk_device_tree(FILE *fil, struct device *ptr, void (*func)(FILE *, struct device*), struct device *chips) {
+	do {
+		func(fil, ptr);
+		ptr = ptr->next_sibling;
+	} while (ptr);
+}
+
+int main(int argc, char** argv) {
+	if (argc != 3) {
+		printf("usage: sconfig vendor/mainboard outputdir\n");
+		return 1;
+	}
+	char *mainboard=argv[1];
+	char *outputdir=argv[2];
+	char *devtree=malloc(strlen(mainboard)+30);
+	char *outputc=malloc(strlen(outputdir)+10);
+	sprintf(devtree, "src/mainboard/%s/devicetree.cb", mainboard);
+	sprintf(outputc, "%s/static.c", outputdir);
+
+	headers.next = malloc(sizeof(struct header));
+	headers.next->name = malloc(strlen(mainboard)+12);
+	headers.next->next = 0;
+	sprintf(headers.next->name, "mainboard/%s", mainboard);
+
+	FILE *filec = fopen(devtree, "r");
+	yyrestart(filec);
+
+	FILE *staticc = fopen(outputc, "w");
+
+	cur_bus = cur_parent = lastdev = head = &root;
+	yyparse();
+	fclose(filec);
+
+	if ((head->type == chip) && (!head->chiph_exists)) {
+		struct device *tmp = head;
+		head = &root;
+		while (head->next != tmp) head = head->next;
+	}
+
+	fprintf(staticc, "#include <device/device.h>\n");
+	fprintf(staticc, "#include <device/pci.h>\n");
+	struct header *h = &headers;
+	while (h->next) {
+		h = h->next;
+		fprintf(staticc, "#include \"%s/chip.h\"\n", h->name);
+	}
+	fprintf(staticc, "\n/* pass 0 */\n");
+	walk_device_tree(staticc, &root, pass0, NULL);
+	fprintf(staticc, "\n/* pass 1 */\nstruct mainboard_config mainboard_info_0;\nstruct device **last_dev_p = &%s.next;\n", lastdev->name);
+	walk_device_tree(staticc, &root, pass1, NULL);
+
+	fclose(staticc);
+	return 0;
+}
diff --git a/util/sconfig/sconfig.h b/util/sconfig/sconfig.h
new file mode 100755
index 0000000000..78305464ba
--- /dev/null
+++ b/util/sconfig/sconfig.h
@@ -0,0 +1,93 @@
+/*
+ * sconfig, coreboot device tree compiler
+ *
+ * Copyright (C) 2010 coresystems GmbH
+ *                 written by Patrick Georgi <patrick.georgi@coresystems.de>
+ *
+ * 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; version 2 of the License.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+
+enum devtype { chip, device };
+
+struct resource;
+struct resource {
+	int type;
+	int index;
+	int base;
+	struct resource *next;
+};
+
+struct reg;
+struct reg {
+	char *key;
+	char *value;
+	struct reg *next;
+};
+
+struct device;
+struct device {
+	int id;
+	int enabled;
+	int used;
+	int multidev;
+	int link;
+	int rescnt;
+	int chiph_exists;
+	char *ops;
+	char *name;
+	char *aliased_name;
+	char *name_underscore;
+	char *path;
+	int path_a;
+	int path_b;
+	int bustype;
+	enum devtype type;
+	struct device *parent;
+	struct device *bus;
+	struct device *next;
+	struct device *nextdev;
+	struct device *children;
+	struct device *latestchild;
+	struct device *next_sibling;
+	struct device *sibling;
+	struct device *chip;
+	struct resource *res;
+	struct reg *reg;
+};
+
+extern struct device *cur_parent, *cur_bus;
+
+struct header;
+struct header {
+	char *name;
+	struct header *next;
+};
+
+void fold_in(struct device *parent);
+
+void postprocess_devtree(void);
+struct device *new_chip(char *path);
+void add_header(struct device *dev);
+struct device *new_device(const int bus, const char *devnum, int enabled);
+void alias_siblings(struct device *d);
+void add_resource(int type, int index, int base);
+void add_register(char *name, char *val);
diff --git a/util/sconfig/sconfig.tab.c_shipped b/util/sconfig/sconfig.tab.c_shipped
index 27c570dd0f..7490546921 100644
--- a/util/sconfig/sconfig.tab.c_shipped
+++ b/util/sconfig/sconfig.tab.c_shipped
@@ -2,20 +2,20 @@
 /* A Bison parser, made by GNU Bison 2.4.1.  */
 
 /* Skeleton implementation for Bison's Yacc-like parsers in C
-
+   
       Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006
    Free Software Foundation, Inc.
-
+   
    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 3 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, see <http://www.gnu.org/licenses/>.  */
 
@@ -28,7 +28,7 @@
    special exception, which will cause the skeleton and the resulting
    Bison output files to be licensed under the GNU General Public
    License without this special exception.
-
+   
    This special exception was added by the Free Software Foundation in
    version 2.2 of Bison.  */
 
@@ -88,108 +88,10 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
  */
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <errno.h>
-
-enum devtype { chip, device };
-
-struct resource;
-struct resource {
-	int type;
-	int index;
-	int base;
-	struct resource *next;
-};
-
-struct reg;
-struct reg {
-	char *key;
-	char *value;
-	struct reg *next;
-};
+#include "sconfig.h"
 
-struct device;
-struct device {
-	int id;
-	int enabled;
-	int used;
-	int multidev;
-	int link;
-	int rescnt;
-	int chiph_exists;
-	char *ops;
-	char *name;
-	char *aliased_name;
-	char *name_underscore;
-	char *path;
-	int path_a;
-	int path_b;
-	int bustype;
-	enum devtype type;
-	struct device *parent;
-	struct device *bus;
-	struct device *next;
-	struct device *nextdev;
-	struct device *children;
-	struct device *latestchild;
-	struct device *next_sibling;
-	struct device *sibling;
-	struct device *chip;
-	struct resource *res;
-	struct reg *reg;
-} *head, *lastdev, *cur_parent, *cur_bus, root;
-
-struct header;
-struct header {
-	char *name;
-	struct header *next;
-} headers;
-
-int devcount = 0;
-
-struct device *new_dev() {
-	struct device *dev = malloc(sizeof(struct device));
-	memset(dev, 0, sizeof(struct device));
-	dev->id = ++devcount;
-	dev->parent = cur_parent;
-	dev->bus = cur_bus;
-	head->next = dev;
-	head = dev;
-	return dev;
-}
-
-int device_match(struct device *a, struct device *b) {
-	if ((a->bustype == b->bustype) && (a->bus == b->bus) && (a->path_a == b->path_a) && (a->path_b == b->path_b))
-		return 1;
-	return 0;
-}
-
-void fold_in(struct device *parent) {
-	struct device *child = parent->children;
-	struct device *latest = 0;
-	while (child != latest) {
-		if (child->children) {
-			if (!latest) latest = child->children;
-			parent->latestchild->next_sibling = child->children;
-			parent->latestchild = child->latestchild;
-		}
-		child = child->next_sibling;
-	}
-}
-
-int yywrap(void) {
-	return 1;
-}
+struct device *cur_parent, *cur_bus;
 
-void yyerror (char const *str)
-{
-	fprintf (stderr, "%s\n", str);
-}
 
 
 
@@ -549,10 +451,10 @@ static const yytype_int8 yyrhs[] =
 };
 
 /* YYRLINE[YYN] -- source line where rule number YYN was defined.  */
-static const yytype_uint16 yyrline[] =
+static const yytype_uint8 yyrline[] =
 {
-       0,   132,   132,   152,   152,   154,   154,   154,   156,   156,
-     156,   158,   158,   215,   215,   294,   312
+       0,    34,    34,    36,    36,    38,    38,    38,    40,    40,
+      40,    42,    42,    52,    52,    64,    67
 };
 #endif
 
@@ -1466,56 +1368,13 @@ yyreduce:
     {
         case 2:
 
-    {
-	root.next_sibling = root.children;
-	root.next_sibling->next_sibling = root.next_sibling->children;
-
-	struct device *dev = &root;
-	while (dev) {
-		/* skip "chip" elements in children chain */
-		while (dev->children && (dev->children->type == chip)) dev->children = dev->children->children;
-		/* skip "chip" elements and functions of the same device in sibling chain */
-		while (dev->sibling && dev->sibling->used) dev->sibling = dev->sibling->sibling;
-		/* If end of chain, and parent is a chip, move on */
-		if (!dev->sibling && (dev->parent->type == chip)) dev->sibling = dev->parent->sibling;
-		/* skip chips */
-		while (dev->sibling && dev->sibling->type == chip) dev->sibling = dev->sibling->children;
-		/* skip duplicate function elements in nextdev chain */
-		while (dev->nextdev && dev->nextdev->used) dev->nextdev = dev->nextdev->nextdev;
-		dev = dev->next_sibling;
-	}
-	;}
+    { postprocess_devtree(); ;}
     break;
 
   case 11:
 
     {
-	(yyval.device) = new_dev();
-	(yyval.device)->chiph_exists = 1;
-	(yyval.device)->name = (yyvsp[(2) - (2)].string);
-	(yyval.device)->name_underscore = strdup((yyval.device)->name);
-	char *c;
-	for (c = (yyval.device)->name_underscore; *c; c++) {
-		if (*c == '/') *c = '_';
-		if (*c == '-') *c = '_';
-	}
-	(yyval.device)->type = chip;
-	(yyval.device)->chip = (yyval.device);
-
-	struct stat st;
-	char *chip_h = malloc(strlen((yyvsp[(2) - (2)].string))+12);
-	sprintf(chip_h, "src/%s/chip.h", (yyvsp[(2) - (2)].string));
-	if ((stat(chip_h, &st) == -1) && (errno == ENOENT))
-		(yyval.device)->chiph_exists = 0;
-
-	if (cur_parent->latestchild) {
-		cur_parent->latestchild->next_sibling = (yyval.device);
-		cur_parent->latestchild->sibling = (yyval.device);
-	}
-	cur_parent->latestchild = (yyval.device);
-	if (!cur_parent->children)
-		cur_parent->children = (yyval.device);
-
+	(yyval.device) = new_chip((yyvsp[(2) - (2)].string));
 	cur_parent = (yyval.device);
 ;}
     break;
@@ -1524,82 +1383,15 @@ yyreduce:
 
     {
 	cur_parent = (yyvsp[(3) - (5)].device)->parent;
-
 	fold_in((yyvsp[(3) - (5)].device));
-
-	if ((yyvsp[(3) - (5)].device)->chiph_exists) {
-		int include_exists = 0;
-		struct header *h = &headers;
-		while (h->next) {
-			int result = strcmp((yyvsp[(3) - (5)].device)->name, h->next->name);
-			if (result == 0) {
-				include_exists = 1;
-				break;
-			}
-			if (result < 0) break;
-			h = h->next;
-		}
-		if (!include_exists) {
-			struct header *tmp = h->next;
-			h->next = malloc(sizeof(struct header));
-			memset(h->next, 0, sizeof(struct header));
-			h->next->name = (yyvsp[(3) - (5)].device)->name;
-			h->next->next = tmp;
-			break;
-		}
-	}
+	add_header((yyvsp[(3) - (5)].device));
 ;}
     break;
 
   case 13:
 
     {
-	(yyval.device) = new_dev();
-	(yyval.device)->bustype = (yyvsp[(2) - (4)].number);
-
-	char *tmp;
-	(yyval.device)->path_a = strtol(strdup((yyvsp[(3) - (4)].string)), &tmp, 16);
-	if (*tmp == '.') {
-		tmp++;
-		(yyval.device)->path_b = strtol(tmp, NULL, 16);
-	}
-
-	char *name = malloc(10);
-	sprintf(name, "_dev%d", (yyval.device)->id);
-	(yyval.device)->name = name;
-	(yyval.device)->name_underscore = name; // shouldn't be necessary, but avoid 0-ptr
-	(yyval.device)->type = device;
-	(yyval.device)->enabled = (yyvsp[(4) - (4)].number);
-	(yyval.device)->chip = (yyval.device)->parent->chip;
-
-	if (cur_parent->latestchild) {
-		cur_parent->latestchild->next_sibling = (yyval.device);
-		cur_parent->latestchild->sibling = (yyval.device);
-	}
-	cur_parent->latestchild = (yyval.device);
-	if (!cur_parent->children)
-		cur_parent->children = (yyval.device);
-
-	lastdev->nextdev = (yyval.device);
-	lastdev = (yyval.device);
-	if ((yyvsp[(2) - (4)].number) == PCI) {
-		(yyval.device)->path = ".type=DEVICE_PATH_PCI,{.pci={ .devfn = PCI_DEVFN(0x%x,%d)}}";
-	}
-	if ((yyvsp[(2) - (4)].number) == PNP) {
-		(yyval.device)->path = ".type=DEVICE_PATH_PNP,{.pnp={ .port = 0x%x, .device = 0x%x }}";
-	}
-	if ((yyvsp[(2) - (4)].number) == I2C) {
-		(yyval.device)->path = ".type=DEVICE_PATH_I2C,{.i2c={ .device = 0x%x }}";
-	}
-	if ((yyvsp[(2) - (4)].number) == APIC) {
-		(yyval.device)->path = ".type=DEVICE_PATH_APIC,{.apic={ .apic_id = 0x%x }}";
-	}
-	if ((yyvsp[(2) - (4)].number) == APIC_CLUSTER) {
-		(yyval.device)->path = ".type=DEVICE_PATH_APIC_CLUSTER,{.apic_cluster={ .cluster = 0x%x }}";
-	}
-	if ((yyvsp[(2) - (4)].number) == PCI_DOMAIN) {
-		(yyval.device)->path = ".type=DEVICE_PATH_PCI_DOMAIN,{.pci_domain={ .domain = 0x%x }}";
-	}
+	(yyval.device) = new_device((yyvsp[(2) - (4)].number), (yyvsp[(3) - (4)].string), (yyvsp[(4) - (4)].number));
 	cur_parent = (yyval.device);
 	cur_bus = (yyval.device);
 ;}
@@ -1610,79 +1402,19 @@ yyreduce:
     {
 	cur_parent = (yyvsp[(5) - (7)].device)->parent;
 	cur_bus = (yyvsp[(5) - (7)].device)->bus;
-
 	fold_in((yyvsp[(5) - (7)].device));
-
-	struct device *d = (yyvsp[(5) - (7)].device)->children;
-	while (d) {
-		int link = 0;
-		struct device *cmp = d->next_sibling;
-		while (cmp && (cmp->bus == d->bus) && (cmp->path_a == d->path_a) && (cmp->path_b == d->path_b)) {
-			if (cmp->type==device && !cmp->used) {
-				if (device_match(d, cmp)) {
-					d->multidev = 1;
-
-					cmp->aliased_name = malloc(12);
-					sprintf(cmp->aliased_name, "_dev%d", cmp->id);
-					cmp->id = d->id;
-					cmp->name = d->name;
-					cmp->used = 1;
-					cmp->link = ++link;
-				}
-			}
-			cmp = cmp->next_sibling;
-		}
-		d = d->next_sibling;
-	}
+	alias_siblings((yyvsp[(5) - (7)].device)->children);
 ;}
     break;
 
   case 15:
 
-    {
-		struct resource *r = malloc(sizeof(struct resource));
-		memset (r, 0, sizeof(struct resource));
-		r->type = (yyvsp[(1) - (4)].number);
-		r->index = strtol((yyvsp[(2) - (4)].string), NULL, 0);
-		r->base = strtol((yyvsp[(4) - (4)].string), NULL, 0);
-		if (cur_parent->res) {
-			struct resource *head = cur_parent->res;
-			while (head->next) head = head->next;
-			head->next = r;
-		} else {
-			cur_parent->res = r;
-		}
-		cur_parent->rescnt++;
-	;}
+    { add_resource((yyvsp[(1) - (4)].number), strtol((yyvsp[(2) - (4)].string), NULL, 0), strtol((yyvsp[(4) - (4)].string), NULL, 0)); ;}
     break;
 
   case 16:
 
-    {
-		struct reg *r = malloc(sizeof(struct reg));
-		memset (r, 0, sizeof(struct reg));
-		r->key = (yyvsp[(2) - (4)].string);
-		r->value = (yyvsp[(4) - (4)].string);
-		if (cur_parent->reg) {
-			struct reg *head = cur_parent->reg;
-			// sorting to be equal to sconfig's behaviour
-			int sort = strcmp(r->key, head->key);
-			if (sort == 0) {
-				printf("ERROR: duplicate 'register' key.\n");
-				exit(1);
-			}
-			if (sort<0) {
-				r->next = head;
-				cur_parent->reg = r;
-			} else {
-				while ((head->next) && (strcmp(head->next->key, r->key)<0)) head = head->next;
-				r->next = head->next;
-				head->next = r;
-			}
-		} else {
-			cur_parent->reg = r;
-		}
-	;}
+    { add_register((yyvsp[(2) - (4)].string), (yyvsp[(4) - (4)].string)); ;}
     break;
 
 
@@ -1898,165 +1630,4 @@ yyreturn:
 
 
 
-void pass0(FILE *fil, struct device *ptr) {
-	if ((ptr->type == device) && (ptr->id != 0) && (!ptr->used))
-		fprintf(fil, "struct device %s;\n", ptr->name);
-	if ((ptr->type == device) && (ptr->id != 0) && ptr->used)
-		fprintf(fil, "struct device %s;\n", ptr->aliased_name);
-}
-
-void pass1(FILE *fil, struct device *ptr) {
-	if (!ptr->used && (ptr->type == device)) {
-		fprintf(fil, "struct device %s = {\n", ptr->name);
-		fprintf(fil, "\t.ops = %s,\n", (ptr->ops)?(ptr->ops):"0");
-		fprintf(fil, "\t.bus = &%s.link[%d],\n", ptr->bus->name, ptr->bus->link);
-		fprintf(fil, "\t.path = {");
-		fprintf(fil, ptr->path, ptr->path_a, ptr->path_b);
-		fprintf(fil, "},\n");
-		fprintf(fil, "\t.enabled = %d,\n", ptr->enabled);
-		fprintf(fil, "\t.on_mainboard = 1,\n");
-		if (ptr->rescnt > 0) {
-			fprintf(fil, "\t.resources = %d,\n", ptr->rescnt);
-			fprintf(fil, "\t.resource = {\n");
-			struct resource *r = ptr->res;
-			while (r) {
-				fprintf(fil, "\t\t{ .flags=IORESOURCE_FIXED | IORESOURCE_ASSIGNED | IORESOURCE_");
-				if (r->type == IRQ) fprintf(fil, "IRQ");
-				if (r->type == DRQ) fprintf(fil, "DRQ");
-				if (r->type == IO) fprintf(fil, "IO");
-				fprintf(fil, ", .index=0x%x, .base=0x%x},\n", r->index, r->base);
-				r = r->next;
-			}
-			fprintf(fil, "\t },\n");
-		}
-		int link = 0;
-		fprintf(fil, "\t.link = {\n");
-		if (ptr->multidev) {
-			struct device *d = ptr;
-			while (d) {
-				if (device_match(d, ptr)) {
-					fprintf(fil, "\t\t[%d] = {\n", d->link);
-					fprintf(fil, "\t\t\t.link = %d,\n", d->link);
-					fprintf(fil, "\t\t\t.dev = &%s,\n", d->name);
-					if (d->children)
-						fprintf(fil, "\t\t\t.children = &%s,\n", d->children->name);
-					fprintf(fil, "\t\t},\n");
-					link++;
-				}
-				d = d->next_sibling;
-			}
-		} else {
-			if (ptr->children) {
-				fprintf(fil, "\t\t[0] = {\n");
-				fprintf(fil, "\t\t\t.link = 0,\n");
-				fprintf(fil, "\t\t\t.dev = &%s,\n", ptr->name);
-				fprintf(fil, "\t\t\t.children = &%s,\n", ptr->children->name);
-				fprintf(fil, "\t\t},\n");
-				link++;
-			}
-		}
-		fprintf(fil, "\t},\n");
-		fprintf(fil, "\t.links = %d,\n", link);
-		if (ptr->sibling)
-			fprintf(fil, "\t.sibling = &%s,\n", ptr->sibling->name);
-		if (ptr->chip->chiph_exists) {
-			fprintf(fil, "\t.chip_ops = &%s_ops,\n", ptr->chip->name_underscore);
-			fprintf(fil, "\t.chip_info = &%s_info_%d,\n", ptr->chip->name_underscore, ptr->chip->id);
-		}
-		if (ptr->nextdev)
-			fprintf(fil, "\t.next=&%s\n", ptr->nextdev->name);
-		fprintf(fil, "};\n");
-	}
-	if ((ptr->type == chip) && (ptr->chiph_exists)) {
-		if (ptr->reg) {
-			fprintf(fil, "struct %s_config %s_info_%d\t= {\n", ptr->name_underscore, ptr->name_underscore, ptr->id);
-			struct reg *r = ptr->reg;
-			while (r) {
-				fprintf(fil, "\t.%s = %s,\n", r->key, r->value);
-				r = r->next;
-			}
-			fprintf(fil, "};\n\n");
-		} else {
-			fprintf(fil, "struct %s_config %s_info_%d;\n", ptr->name_underscore, ptr->name_underscore, ptr->id);
-		}
-	}
-}
-
-void walk_device_tree(FILE *fil, struct device *ptr, void (*func)(FILE *, struct device*), struct device *chips) {
-	do {
-		func(fil, ptr);
-		ptr = ptr->next_sibling;
-	} while (ptr);
-}
-
-struct device mainboard = {
-	.name = "mainboard",
-	.name_underscore = "mainboard",
-	.id = 0,
-	.chip = &mainboard,
-	.type = chip,
-	.chiph_exists = 1,
-	.children = &root
-};
-
-struct device root = {
-	.name = "dev_root",
-	.name_underscore = "dev_root",
-	.id = 0,
-	.chip = &mainboard,
-	.type = device,
-	.path = " .type = DEVICE_PATH_ROOT ",
-	.ops = "&default_dev_ops_root",
-	.parent = &root,
-	.bus = &root,
-	.enabled = 1
-};
-
-int main(int argc, char** argv) {
-	if (argc != 3) {
-		printf("usage: sconfig vendor/mainboard outputdir\n");
-		return 1;
-	}
-	char *mainboard=argv[1];
-	char *outputdir=argv[2];
-	char *devtree=malloc(strlen(mainboard)+30);
-	char *outputc=malloc(strlen(outputdir)+10);
-	sprintf(devtree, "src/mainboard/%s/devicetree.cb", mainboard);
-	sprintf(outputc, "%s/static.c", outputdir);
-
-	headers.next = malloc(sizeof(struct header));
-	headers.next->name = malloc(strlen(mainboard)+12);
-	headers.next->next = 0;
-	sprintf(headers.next->name, "mainboard/%s", mainboard);
-
-	FILE *filec = fopen(devtree, "r");
-	yyrestart(filec);
-
-	FILE *staticc = fopen(outputc, "w");
-
-	cur_bus = cur_parent = lastdev = head = &root;
-	yyparse();
-	fclose(filec);
-
-	if ((head->type == chip) && (!head->chiph_exists)) {
-		struct device *tmp = head;
-		head = &root;
-		while (head->next != tmp) head = head->next;
-	}
-
-	fprintf(staticc, "#include <device/device.h>\n");
-	fprintf(staticc, "#include <device/pci.h>\n");
-	struct header *h = &headers;
-	while (h->next) {
-		h = h->next;
-		fprintf(staticc, "#include \"%s/chip.h\"\n", h->name);
-	}
-	fprintf(staticc, "\n/* pass 0 */\n");
-	walk_device_tree(staticc, &root, pass0, NULL);
-	fprintf(staticc, "\n/* pass 1 */\nstruct mainboard_config mainboard_info_0;\nstruct device **last_dev_p = &%s.next;\n", lastdev->name);
-	walk_device_tree(staticc, &root, pass1, NULL);
-
-	fclose(staticc);
-	return 0;
-}
 
diff --git a/util/sconfig/sconfig.tab.h_shipped b/util/sconfig/sconfig.tab.h_shipped
index 2c24fef256..8c6b5f6144 100644
--- a/util/sconfig/sconfig.tab.h_shipped
+++ b/util/sconfig/sconfig.tab.h_shipped
@@ -2,20 +2,20 @@
 /* A Bison parser, made by GNU Bison 2.4.1.  */
 
 /* Skeleton interface for Bison's Yacc-like parsers in C
-
+   
       Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006
    Free Software Foundation, Inc.
-
+   
    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 3 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, see <http://www.gnu.org/licenses/>.  */
 
@@ -28,7 +28,7 @@
    special exception, which will cause the skeleton and the resulting
    Bison output files to be licensed under the GNU General Public
    License without this special exception.
-
+   
    This special exception was added by the Free Software Foundation in
    version 2.2 of Bison.  */
 
diff --git a/util/sconfig/sconfig.y b/util/sconfig/sconfig.y
index 2b6157f89f..3860569a95 100755
--- a/util/sconfig/sconfig.y
+++ b/util/sconfig/sconfig.y
@@ -19,108 +19,10 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
  */
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <errno.h>
+#include "sconfig.h"
 
-enum devtype { chip, device };
+struct device *cur_parent, *cur_bus;
 
-struct resource;
-struct resource {
-	int type;
-	int index;
-	int base;
-	struct resource *next;
-};
-
-struct reg;
-struct reg {
-	char *key;
-	char *value;
-	struct reg *next;
-};
-
-struct device;
-struct device {
-	int id;
-	int enabled;
-	int used;
-	int multidev;
-	int link;
-	int rescnt;
-	int chiph_exists;
-	char *ops;
-	char *name;
-	char *aliased_name;
-	char *name_underscore;
-	char *path;
-	int path_a;
-	int path_b;
-	int bustype;
-	enum devtype type;
-	struct device *parent;
-	struct device *bus;
-	struct device *next;
-	struct device *nextdev;
-	struct device *children;
-	struct device *latestchild;
-	struct device *next_sibling;
-	struct device *sibling;
-	struct device *chip;
-	struct resource *res;
-	struct reg *reg;
-} *head, *lastdev, *cur_parent, *cur_bus, root;
-
-struct header;
-struct header {
-	char *name;
-	struct header *next;
-} headers;
-
-int devcount = 0;
-
-struct device *new_dev() {
-	struct device *dev = malloc(sizeof(struct device));
-	memset(dev, 0, sizeof(struct device));
-	dev->id = ++devcount;
-	dev->parent = cur_parent;
-	dev->bus = cur_bus;
-	head->next = dev;
-	head = dev;
-	return dev;
-}
-
-int device_match(struct device *a, struct device *b) {
-	if ((a->bustype == b->bustype) && (a->bus == b->bus) && (a->path_a == b->path_a) && (a->path_b == b->path_b))
-		return 1;
-	return 0;
-}
-
-void fold_in(struct device *parent) {
-	struct device *child = parent->children;
-	struct device *latest = 0;
-	while (child != latest) {
-		if (child->children) {
-			if (!latest) latest = child->children;
-			parent->latestchild->next_sibling = child->children;
-			parent->latestchild = child->latestchild;
-		}
-		child = child->next_sibling;
-	}
-}
-
-int yywrap(void) {
-	return 1;
-}
-
-void yyerror (char const *str)
-{
-	fprintf (stderr, "%s\n", str);
-}
 %}
 %union {
 	struct device *device;
@@ -129,25 +31,7 @@ void yyerror (char const *str)
 }
 %token CHIP DEVICE REGISTER BOOL BUS RESOURCE END EQUALS HEX STRING PCI PNP I2C APIC APIC_CLUSTER PCI_DOMAIN IRQ DRQ IO NUMBER
 %%
-devtree: devchip {
-	root.next_sibling = root.children;
-	root.next_sibling->next_sibling = root.next_sibling->children;
-
-	struct device *dev = &root;
-	while (dev) {
-		/* skip "chip" elements in children chain */
-		while (dev->children && (dev->children->type == chip)) dev->children = dev->children->children;
-		/* skip "chip" elements and functions of the same device in sibling chain */
-		while (dev->sibling && dev->sibling->used) dev->sibling = dev->sibling->sibling;
-		/* If end of chain, and parent is a chip, move on */
-		if (!dev->sibling && (dev->parent->type == chip)) dev->sibling = dev->parent->sibling;
-		/* skip chips */
-		while (dev->sibling && dev->sibling->type == chip) dev->sibling = dev->sibling->children;
-		/* skip duplicate function elements in nextdev chain */
-		while (dev->nextdev && dev->nextdev->used) dev->nextdev = dev->nextdev->nextdev;
-		dev = dev->next_sibling;
-	}
-	};
+devtree: devchip { postprocess_devtree(); } ;
 
 devchip: chip | device ;
 
@@ -156,346 +40,31 @@ devices: devices devchip | devices registers | ;
 devicesorresources: devicesorresources devchip | devicesorresources resource | ;
 
 chip: CHIP STRING /* == path */ {
-	$<device>$ = new_dev();
-	$<device>$->chiph_exists = 1;
-	$<device>$->name = $<string>2;
-	$<device>$->name_underscore = strdup($<device>$->name);
-	char *c;
-	for (c = $<device>$->name_underscore; *c; c++) {
-		if (*c == '/') *c = '_';
-		if (*c == '-') *c = '_';
-	}
-	$<device>$->type = chip;
-	$<device>$->chip = $<device>$;
-
-	struct stat st;
-	char *chip_h = malloc(strlen($<string>2)+12);
-	sprintf(chip_h, "src/%s/chip.h", $<string>2);
-	if ((stat(chip_h, &st) == -1) && (errno == ENOENT))
-		$<device>$->chiph_exists = 0;
-
-	if (cur_parent->latestchild) {
-		cur_parent->latestchild->next_sibling = $<device>$;
-		cur_parent->latestchild->sibling = $<device>$;
-	}
-	cur_parent->latestchild = $<device>$;
-	if (!cur_parent->children)
-		cur_parent->children = $<device>$;
-
+	$<device>$ = new_chip($<string>2);
 	cur_parent = $<device>$;
 }
 	devices END {
 	cur_parent = $<device>3->parent;
-
 	fold_in($<device>3);
-
-	if ($<device>3->chiph_exists) {
-		int include_exists = 0;
-		struct header *h = &headers;
-		while (h->next) {
-			int result = strcmp($<device>3->name, h->next->name);
-			if (result == 0) {
-				include_exists = 1;
-				break;
-			}
-			if (result < 0) break;
-			h = h->next;
-		}
-		if (!include_exists) {
-			struct header *tmp = h->next;
-			h->next = malloc(sizeof(struct header));
-			memset(h->next, 0, sizeof(struct header));
-			h->next->name = $<device>3->name;
-			h->next->next = tmp;
-			break;
-		}
-	}
+	add_header($<device>3);
 };
 
 device: DEVICE BUS NUMBER /* == devnum */ BOOL {
-	$<device>$ = new_dev();
-	$<device>$->bustype = $<number>2;
-
-	char *tmp;
-	$<device>$->path_a = strtol(strdup($<string>3), &tmp, 16);
-	if (*tmp == '.') {
-		tmp++;
-		$<device>$->path_b = strtol(tmp, NULL, 16);
-	}
-
-	char *name = malloc(10);
-	sprintf(name, "_dev%d", $<device>$->id);
-	$<device>$->name = name;
-	$<device>$->name_underscore = name; // shouldn't be necessary, but avoid 0-ptr
-	$<device>$->type = device;
-	$<device>$->enabled = $<number>4;
-	$<device>$->chip = $<device>$->parent->chip;
-
-	if (cur_parent->latestchild) {
-		cur_parent->latestchild->next_sibling = $<device>$;
-		cur_parent->latestchild->sibling = $<device>$;
-	}
-	cur_parent->latestchild = $<device>$;
-	if (!cur_parent->children)
-		cur_parent->children = $<device>$;
-
-	lastdev->nextdev = $<device>$;
-	lastdev = $<device>$;
-	if ($<number>2 == PCI) {
-		$<device>$->path = ".type=DEVICE_PATH_PCI,{.pci={ .devfn = PCI_DEVFN(0x%x,%d)}}";
-	}
-	if ($<number>2 == PNP) {
-		$<device>$->path = ".type=DEVICE_PATH_PNP,{.pnp={ .port = 0x%x, .device = 0x%x }}";
-	}
-	if ($<number>2 == I2C) {
-		$<device>$->path = ".type=DEVICE_PATH_I2C,{.i2c={ .device = 0x%x }}";
-	}
-	if ($<number>2 == APIC) {
-		$<device>$->path = ".type=DEVICE_PATH_APIC,{.apic={ .apic_id = 0x%x }}";
-	}
-	if ($<number>2 == APIC_CLUSTER) {
-		$<device>$->path = ".type=DEVICE_PATH_APIC_CLUSTER,{.apic_cluster={ .cluster = 0x%x }}";
-	}
-	if ($<number>2 == PCI_DOMAIN) {
-		$<device>$->path = ".type=DEVICE_PATH_PCI_DOMAIN,{.pci_domain={ .domain = 0x%x }}";
-	}
+	$<device>$ = new_device($<number>2, $<string>3, $<number>4);
 	cur_parent = $<device>$;
 	cur_bus = $<device>$;
 }
 	devicesorresources END {
 	cur_parent = $<device>5->parent;
 	cur_bus = $<device>5->bus;
-
 	fold_in($<device>5);
-
-	struct device *d = $<device>5->children;
-	while (d) {
-		int link = 0;
-		struct device *cmp = d->next_sibling;
-		while (cmp && (cmp->bus == d->bus) && (cmp->path_a == d->path_a) && (cmp->path_b == d->path_b)) {
-			if (cmp->type==device && !cmp->used) {
-				if (device_match(d, cmp)) {
-					d->multidev = 1;
-
-					cmp->aliased_name = malloc(12);
-					sprintf(cmp->aliased_name, "_dev%d", cmp->id);
-					cmp->id = d->id;
-					cmp->name = d->name;
-					cmp->used = 1;
-					cmp->link = ++link;
-				}
-			}
-			cmp = cmp->next_sibling;
-		}
-		d = d->next_sibling;
-	}
+	alias_siblings($<device>5->children);
 };
 
 resource: RESOURCE NUMBER /* == resnum */ EQUALS NUMBER /* == resval */
-	{
-		struct resource *r = malloc(sizeof(struct resource));
-		memset (r, 0, sizeof(struct resource));
-		r->type = $<number>1;
-		r->index = strtol($<string>2, NULL, 0);
-		r->base = strtol($<string>4, NULL, 0);
-		if (cur_parent->res) {
-			struct resource *head = cur_parent->res;
-			while (head->next) head = head->next;
-			head->next = r;
-		} else {
-			cur_parent->res = r;
-		}
-		cur_parent->rescnt++;
-	}
-	;
+	{ add_resource($<number>1, strtol($<string>2, NULL, 0), strtol($<string>4, NULL, 0)); } ;
 
 registers: REGISTER STRING /* == regname */ EQUALS STRING /* == regval */
-	{
-		struct reg *r = malloc(sizeof(struct reg));
-		memset (r, 0, sizeof(struct reg));
-		r->key = $<string>2;
-		r->value = $<string>4;
-		if (cur_parent->reg) {
-			struct reg *head = cur_parent->reg;
-			// sorting to be equal to sconfig's behaviour
-			int sort = strcmp(r->key, head->key);
-			if (sort == 0) {
-				printf("ERROR: duplicate 'register' key.\n");
-				exit(1);
-			}
-			if (sort<0) {
-				r->next = head;
-				cur_parent->reg = r;
-			} else {
-				while ((head->next) && (strcmp(head->next->key, r->key)<0)) head = head->next;
-				r->next = head->next;
-				head->next = r;
-			}
-		} else {
-			cur_parent->reg = r;
-		}
-	}
-	;
+	{ add_register($<string>2, $<string>4); } ;
 
 %%
-void pass0(FILE *fil, struct device *ptr) {
-	if ((ptr->type == device) && (ptr->id != 0) && (!ptr->used))
-		fprintf(fil, "struct device %s;\n", ptr->name);
-	if ((ptr->type == device) && (ptr->id != 0) && ptr->used)
-		fprintf(fil, "struct device %s;\n", ptr->aliased_name);
-}
-
-void pass1(FILE *fil, struct device *ptr) {
-	if (!ptr->used && (ptr->type == device)) {
-		fprintf(fil, "struct device %s = {\n", ptr->name);
-		fprintf(fil, "\t.ops = %s,\n", (ptr->ops)?(ptr->ops):"0");
-		fprintf(fil, "\t.bus = &%s.link[%d],\n", ptr->bus->name, ptr->bus->link);
-		fprintf(fil, "\t.path = {");
-		fprintf(fil, ptr->path, ptr->path_a, ptr->path_b);
-		fprintf(fil, "},\n");
-		fprintf(fil, "\t.enabled = %d,\n", ptr->enabled);
-		fprintf(fil, "\t.on_mainboard = 1,\n");
-		if (ptr->rescnt > 0) {
-			fprintf(fil, "\t.resources = %d,\n", ptr->rescnt);
-			fprintf(fil, "\t.resource = {\n");
-			struct resource *r = ptr->res;
-			while (r) {
-				fprintf(fil, "\t\t{ .flags=IORESOURCE_FIXED | IORESOURCE_ASSIGNED | IORESOURCE_");
-				if (r->type == IRQ) fprintf(fil, "IRQ");
-				if (r->type == DRQ) fprintf(fil, "DRQ");
-				if (r->type == IO) fprintf(fil, "IO");
-				fprintf(fil, ", .index=0x%x, .base=0x%x},\n", r->index, r->base);
-				r = r->next;
-			}
-			fprintf(fil, "\t },\n");
-		}
-		int link = 0;
-		fprintf(fil, "\t.link = {\n");
-		if (ptr->multidev) {
-			struct device *d = ptr;
-			while (d) {
-				if (device_match(d, ptr)) {
-					fprintf(fil, "\t\t[%d] = {\n", d->link);
-					fprintf(fil, "\t\t\t.link = %d,\n", d->link);
-					fprintf(fil, "\t\t\t.dev = &%s,\n", d->name);
-					if (d->children)
-						fprintf(fil, "\t\t\t.children = &%s,\n", d->children->name);
-					fprintf(fil, "\t\t},\n");
-					link++;
-				}
-				d = d->next_sibling;
-			}
-		} else {
-			if (ptr->children) {
-				fprintf(fil, "\t\t[0] = {\n");
-				fprintf(fil, "\t\t\t.link = 0,\n");
-				fprintf(fil, "\t\t\t.dev = &%s,\n", ptr->name);
-				fprintf(fil, "\t\t\t.children = &%s,\n", ptr->children->name);
-				fprintf(fil, "\t\t},\n");
-				link++;
-			}
-		}
-		fprintf(fil, "\t},\n");
-		fprintf(fil, "\t.links = %d,\n", link);
-		if (ptr->sibling)
-			fprintf(fil, "\t.sibling = &%s,\n", ptr->sibling->name);
-		if (ptr->chip->chiph_exists) {
-			fprintf(fil, "\t.chip_ops = &%s_ops,\n", ptr->chip->name_underscore);
-			fprintf(fil, "\t.chip_info = &%s_info_%d,\n", ptr->chip->name_underscore, ptr->chip->id);
-		}
-		if (ptr->nextdev)
-			fprintf(fil, "\t.next=&%s\n", ptr->nextdev->name);
-		fprintf(fil, "};\n");
-	}
-	if ((ptr->type == chip) && (ptr->chiph_exists)) {
-		if (ptr->reg) {
-			fprintf(fil, "struct %s_config %s_info_%d\t= {\n", ptr->name_underscore, ptr->name_underscore, ptr->id);
-			struct reg *r = ptr->reg;
-			while (r) {
-				fprintf(fil, "\t.%s = %s,\n", r->key, r->value);
-				r = r->next;
-			}
-			fprintf(fil, "};\n\n");
-		} else {
-			fprintf(fil, "struct %s_config %s_info_%d;\n", ptr->name_underscore, ptr->name_underscore, ptr->id);
-		}
-	}
-}
-
-void walk_device_tree(FILE *fil, struct device *ptr, void (*func)(FILE *, struct device*), struct device *chips) {
-	do {
-		func(fil, ptr);
-		ptr = ptr->next_sibling;
-	} while (ptr);
-}
-
-struct device mainboard = {
-	.name = "mainboard",
-	.name_underscore = "mainboard",
-	.id = 0,
-	.chip = &mainboard,
-	.type = chip,
-	.chiph_exists = 1,
-	.children = &root
-};
-
-struct device root = {
-	.name = "dev_root",
-	.name_underscore = "dev_root",
-	.id = 0,
-	.chip = &mainboard,
-	.type = device,
-	.path = " .type = DEVICE_PATH_ROOT ",
-	.ops = "&default_dev_ops_root",
-	.parent = &root,
-	.bus = &root,
-	.enabled = 1
-};
-
-int main(int argc, char** argv) {
-	if (argc != 3) {
-		printf("usage: sconfig vendor/mainboard outputdir\n");
-		return 1;
-	}
-	char *mainboard=argv[1];
-	char *outputdir=argv[2];
-	char *devtree=malloc(strlen(mainboard)+30);
-	char *outputc=malloc(strlen(outputdir)+10);
-	sprintf(devtree, "src/mainboard/%s/devicetree.cb", mainboard);
-	sprintf(outputc, "%s/static.c", outputdir);
-
-	headers.next = malloc(sizeof(struct header));
-	headers.next->name = malloc(strlen(mainboard)+12);
-	headers.next->next = 0;
-	sprintf(headers.next->name, "mainboard/%s", mainboard);
-
-	FILE *filec = fopen(devtree, "r");
-	yyrestart(filec);
-
-	FILE *staticc = fopen(outputc, "w");
-
-	cur_bus = cur_parent = lastdev = head = &root;
-	yyparse();
-	fclose(filec);
-
-	if ((head->type == chip) && (!head->chiph_exists)) {
-		struct device *tmp = head;
-		head = &root;
-		while (head->next != tmp) head = head->next;
-	}
-
-	fprintf(staticc, "#include <device/device.h>\n");
-	fprintf(staticc, "#include <device/pci.h>\n");
-	struct header *h = &headers;
-	while (h->next) {
-		h = h->next;
-		fprintf(staticc, "#include \"%s/chip.h\"\n", h->name);
-	}
-	fprintf(staticc, "\n/* pass 0 */\n");
-	walk_device_tree(staticc, &root, pass0, NULL);
-	fprintf(staticc, "\n/* pass 1 */\nstruct mainboard_config mainboard_info_0;\nstruct device **last_dev_p = &%s.next;\n", lastdev->name);
-	walk_device_tree(staticc, &root, pass1, NULL);
-
-	fclose(staticc);
-	return 0;
-}