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dtbgen.c
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dtbgen.c
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/*
* dtbgen.c - DTB generation
*
* (C) Copyright Pantelis Antoniou <[email protected]>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* (1) Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* (2) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* (3)The name of the author may not be used to
* endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#ifdef __linux__
#define _GNU_SOURCE
#endif
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <ctype.h>
#include <time.h>
#include <stdbool.h>
#include <assert.h>
#include <alloca.h>
#include <stdint.h>
#include <sys/time.h>
#ifdef __linux__
#include <linux/limits.h>
#else
#include <limits.h>
#endif
#include "list.h"
#include "utils.h"
#include "syexpr.h"
#include "dt.h"
#include "dtbgen.h"
struct dtb_node {
struct dt_node dt;
/* DTB generation */
unsigned int phandle;
bool marker : 1; /* generic marker */
};
#define to_dtb_node(_n) \
container_of(container_of(_n, struct dt_node, n), struct dtb_node, dt)
struct dtb_property {
struct dt_property dt;
void *data;
int size;
unsigned int offset; /* DTB offset to the string table */
};
#define to_dtb_prop(_p) \
container_of(container_of(_p, struct dt_property, p), struct dtb_property, dt)
struct dtb_ref {
struct dt_ref dt;
unsigned int offset;
struct list_head ovnode; /* when resolving overlays */
};
#define to_dtb_ref(_r) \
container_of(container_of(_r, struct dt_ref, r), struct dtb_ref, dt)
enum dt_data_area {
dt_struct,
dt_strings,
dt_mem_rsvmap,
dt_area_max = dt_mem_rsvmap,
};
/* all refs in the list contain exact match for ref->data */
struct fixup {
struct list_head node;
struct list_head refs;
};
struct noderef {
struct list_head node;
struct node *np;
};
struct dtb_emit_state {
/* DTB generation state */
unsigned int next_phandle;
struct property *memreserve_prop;
bool legacy_phandles : 1;
bool epapr_phandles : 1;
struct {
void *data;
unsigned int alloc;
unsigned int size;
} area[dt_area_max + 1];
struct list_head fixups;
struct list_head noderefs;
};
#define to_dtb(_dt) ((struct dtb_emit_state *)(_dt)->emitter_state)
static void dtb_dump(struct yaml_dt_state *dt);
static struct ref *dtb_ref_alloc(struct tree *t, enum ref_type type,
const void *data, int len, const char *xtag)
{
struct ref *ref;
ref = yaml_dt_ref_alloc(t, type, data, len, xtag,
sizeof(struct dtb_ref));
to_dtb_ref(ref)->offset = -1;
return ref;
}
static void dtb_ref_free(struct tree *t, struct ref *ref)
{
yaml_dt_ref_free(t, ref);
}
static struct property *dtb_prop_alloc(struct tree *t, const char *name)
{
struct dtb_property *dtbprop;
struct property *prop;
prop = yaml_dt_prop_alloc(t, name, sizeof(*dtbprop));
dtbprop = to_dtb_prop(prop);
dtbprop->offset = -1;
dtbprop->data = NULL;
dtbprop->size = 0;
return prop;
}
static void dtb_prop_free(struct tree *t, struct property *prop)
{
if (to_dtb_prop(prop)->data)
free(to_dtb_prop(prop)->data);
yaml_dt_prop_free(t, prop);
}
static struct label *dtb_label_alloc(struct tree *t, const char *name)
{
return yaml_dt_label_alloc(t, name, sizeof(struct dt_label));
}
static void dtb_label_free(struct tree *t, struct label *l)
{
yaml_dt_label_free(t, l);
}
static struct node *dtb_node_alloc(struct tree *t, const char *name,
const char *label)
{
struct node *np;
struct dtb_node *dtbnp;
np = yaml_dt_node_alloc(t, name, label, sizeof(*dtbnp));
dtbnp = to_dtb_node(np);
dtbnp->phandle = 0;
dtbnp->marker = false;
return np;
}
static void dtb_node_free(struct tree *t, struct node *np)
{
yaml_dt_node_free(t, np);
}
static const struct tree_ops dtb_tree_ops = {
.ref_alloc = dtb_ref_alloc,
.ref_free = dtb_ref_free,
.prop_alloc = dtb_prop_alloc,
.prop_free = dtb_prop_free,
.label_alloc = dtb_label_alloc,
.label_free = dtb_label_free,
.node_alloc = dtb_node_alloc,
.node_free = dtb_node_free,
.debugf = yaml_dt_tree_debugf,
.msg_at_node = yaml_dt_tree_msg_at_node,
.msg_at_property = yaml_dt_tree_msg_at_property,
.msg_at_ref = yaml_dt_tree_msg_at_ref,
.msg_at_label = yaml_dt_tree_msg_at_label,
};
static void prop_set_data(struct property *prop, bool append,
const void *data, int size,
bool append_zero, int offset)
{
struct dtb_property *dtbprop = to_dtb_prop(prop);
void *newdata;
int newsize;
/* direct set data */
if (offset >= 0) {
assert(offset + size <= dtbprop->size);
assert(dtbprop->data);
memcpy(dtbprop->data + offset, data, size);
return;
}
if (!append && dtbprop->data) {
free(dtbprop->data);
dtbprop->size = 0;
}
newsize = dtbprop->size + size + (append_zero ? 1 : 0);
if (newsize > 0) {
newdata = malloc(newsize);
assert(newdata);
if (dtbprop->data && dtbprop->size)
memcpy(newdata, dtbprop->data, dtbprop->size);
memcpy(newdata + dtbprop->size, data, size);
if (append_zero)
*((char *)newdata + dtbprop->size + size) = '\0';
if (dtbprop->data)
free(dtbprop->data);
dtbprop->data = newdata;
dtbprop->size = newsize;
} else {
dtbprop->data = NULL;
dtbprop->size = 0;
}
}
static void prop_append(struct property *prop, const void *data,
int size, bool append_zero)
{
prop_set_data(prop, true, data, size, append_zero, -1);
}
static void prop_replace(struct property *prop, const void *data,
int size, int offset)
{
prop_set_data(prop, false, data, size, false, offset);
}
#define RF_LABELS (1 << 0)
#define RF_PHANDLES (1 << 1)
#define RF_PATHS (1 << 2)
#define RF_CONTENT (1 << 3)
static void ref_resolve(struct yaml_dt_state *dt, struct ref *ref)
{
struct node *np;
struct property *prop;
struct dtb_property *dtbprop;
uint8_t val8;
fdt16_t val16;
fdt32_t val32;
fdt64_t val64;
const void *data = NULL;
int size = 0;
bool append_0 = false;
fdt32_t phandlet = 0;
char namebuf[NODE_FULLNAME_MAX];
const char *tag = NULL;
char *refname;
int refnamelen;
void *output_data = NULL;
int err;
prop = ref->prop;
assert(prop);
dtbprop = to_dtb_prop(prop);
data = NULL;
size = 0;
/* get tag */
tag = ref->xtag;
if (!tag)
tag = ref->xtag_builtin;
/* 60 bytes for a display purposes should be enough */
refnamelen = ref->len > 60 ? 60 : ref->len;
refname = alloca(refnamelen + 1);
memcpy(refname, ref->data, refnamelen);
refname[refnamelen] = '\0';
err = dt_resolve_ref(dt, ref);
if (err != 0) {
if (ref->type == r_anchor || ref->type == r_path) {
tree_error_at_ref(to_tree(dt), ref,
"can't resolve reference to %s %s\n",
refname[0] == '/' ? "path" : "label",
refname);
return;
}
if (err == -EINVAL) {
tree_error_at_ref(to_tree(dt), ref, "Invalid %s\n",
refname);
return;
}
if (err == -ERANGE) {
tree_error_at_ref(to_tree(dt), ref, "Invalid range on %s\n",
refname);
return;
}
}
switch (ref->type) {
case r_anchor:
np = to_dt_ref(ref)->npref;
phandlet = np ? cpu_to_fdt32(to_dtb_node(np)->phandle) :
0xffffffff;
data = &phandlet;
size = sizeof(phandlet);
break;
case r_path:
np = to_dt_ref(ref)->npref;
if (np) {
data = dn_fullname(np, namebuf, sizeof(namebuf));
size = strlen(data) + 1;
} else {
data = NULL;
size = 0;
}
break;
case r_scalar:
tag = to_dt_ref(ref)->tag;
/* special memreserve handling */
if (!strcmp(prop->name, "/memreserve/")) {
if (!to_dt_ref(ref)->is_int) {
tree_error_at_ref(to_tree(dt), ref,
"Invalid /memreserve/ property %s\n",
refname);
return;
}
tag = "!uint64";
}
if (!strcmp(tag, "!int") || !strcmp(tag, "!int32") ||
!strcmp(tag, "!uint") || !strcmp(tag, "!uint32")) {
val32 = cpu_to_fdt32((uint32_t)to_dt_ref(ref)->val);
data = &val32;
size = sizeof(val32);
} else if (!strcmp(tag, "!int8") || !strcmp(tag, "!uint8")) {
val8 = (uint8_t)to_dt_ref(ref)->val;
data = &val8;
size = sizeof(val8);
} else if (!strcmp(tag, "!int16") || !strcmp(tag, "!uint16")) {
val16 = cpu_to_fdt16((uint16_t)to_dt_ref(ref)->val);
data = &val16;
size = sizeof(val16);
} else if (!strcmp(tag, "!int64") || !strcmp(tag, "!uint64")) {
val64 = cpu_to_fdt64((uint64_t)to_dt_ref(ref)->val);
data = &val64;
size = sizeof(val64);
} else if (!strcmp(tag, "!str")) {
data = ref->data;
size = ref->len;
append_0 = true;
} else if (!strcmp(tag, "!bool")) {
data = NULL;
size = 0;
if (!to_dt_ref(ref)->val)
dt_warning_at(dt, &to_dt_ref(ref)->m,
"False boolean will not be"
" present in DTB output; %s\n",
refname);
} else if (!strcmp(tag, "!null")) {
data = NULL;
size = 0;
} else if (!strcmp(tag, "!char")) {
val32 = cpu_to_fdt32((uint32_t)to_dt_ref(ref)->val);
data = &val32;
size = sizeof(val32);
} else if (!strcmp(tag, "!base64")) {
data = to_dt_ref(ref)->binary;
size = to_dt_ref(ref)->binary_size;
assert(data);
} else {
tree_error_at_ref(to_tree(dt), ref,
"Unsupported tag %s: %s\n", tag,
refname);
return;
}
break;
default:
/* nothing */
break;
}
assert(tag != NULL);
to_dtb_ref(ref)->offset = dtbprop->size;
prop_append(prop, data, size, append_0);
if (output_data)
free(output_data);
}
static void resolve(struct yaml_dt_state *dt, struct node *npt,
unsigned int flags)
{
struct dtb_emit_state *dtb = to_dtb(dt);
struct node *child;
struct ref *ref, *refn;
struct node *np;
struct property *prop;
struct label *l;
fdt32_t phandlet;
char namebuf[2][NODE_FULLNAME_MAX];
char refname[60 + 1];
int refnamelen;
if ((flags & RF_LABELS) && !to_dtb_node(npt)->phandle &&
!list_empty(&npt->labels)) {
for_each_label_of_node(npt, l)
dt_debug(dt, "label: assigned phandle %u at @%s label %s\n",
to_dtb_node(npt)->phandle,
dn_fullname(npt, &namebuf[0][0], sizeof(namebuf[0])),
l->label);
to_dtb_node(npt)->phandle = dtb->next_phandle++;
assert(dtb->next_phandle != 0 && dtb->next_phandle != -1);
}
for_each_property_of_node(npt, prop) {
for_each_ref_of_property_safe(prop, ref, refn) {
if (flags & RF_CONTENT)
ref_resolve(dt, ref);
/* only handle anchors here */
if (!((flags & RF_PHANDLES) && ref->type == r_anchor))
continue;
if (ref->len > 0 && *(char *)ref->data == '/')
np = node_lookup_by_path(to_tree(dt), ref->data, ref->len);
else
np = node_lookup_by_label(to_tree(dt), ref->data, ref->len);
if (!np && !dt->cfg.object) {
refnamelen = ref->len > sizeof(refname) ? sizeof(refname) : ref->len;
memcpy(refname, ref->data, refnamelen);
refname[refnamelen] = '\0';
tree_error_at_ref(to_tree(dt), ref,
"can't lookup %s %s\n",
refname[0] == '/' ? "path" : "label",
refname);
continue;
}
if (np) {
if (!to_dtb_node(np)->phandle) {
to_dtb_node(np)->phandle = dtb->next_phandle++;
assert(dtb->next_phandle != 0 && dtb->next_phandle != -1);
for_each_label_of_node(np, l)
dt_debug(dt, "assigned phandle %u at @%s label %s (@%s prop %s offset=%u)\n",
to_dtb_node(np)->phandle,
dn_fullname(np, &namebuf[0][0], sizeof(namebuf[0])),
l->label,
dn_fullname(npt, &namebuf[1][0], sizeof(namebuf[1])),
prop->name, to_dtb_prop(prop)->offset);
}
phandlet = to_dtb_node(np)->phandle;
dt_debug(dt, "resolved reference %s at @%s (%u)\n",
prop->name,
dn_fullname(prop->np, &namebuf[0][0], sizeof(namebuf[0])),
to_dtb_node(np)->phandle);
} else {
phandlet = 0xffffffff;
dt_debug(dt, "unresolved external reference %s at @%s\n",
prop->name,
dn_fullname(prop->np, &namebuf[0][0], sizeof(namebuf[0])));
}
phandlet = cpu_to_fdt32(phandlet);
assert(to_dtb_prop(prop)->size >=
to_dtb_ref(ref)->offset + sizeof(fdt32_t));
prop_replace(prop, &phandlet, sizeof(fdt32_t),
to_dtb_ref(ref)->offset);
}
}
for_each_child_of_node(npt, child)
resolve(dt, child, flags);
}
static bool is_node_referenced(struct yaml_dt_state *dt,
struct node *np, struct node *npref)
{
struct dtb_emit_state *dtb = to_dtb(dt);
struct noderef *nr;
list_for_each_entry(nr, &dtb->noderefs, node) {
if (nr->np == npref)
return true;
}
return false;
}
static void add_phandle_prop(struct yaml_dt_state *dt, struct node *np,
const char *propname)
{
struct property *prop;
fdt32_t phandle;
prop = prop_alloc(to_tree(dt), "phandle");
phandle = cpu_to_fdt32(to_dtb_node(np)->phandle);
prop_append(prop, &phandle, sizeof(fdt32_t), false);
prop->np = np;
list_add_tail(&prop->node, &np->properties);
}
static void append_auto_properties(struct yaml_dt_state *dt, struct node *np)
{
struct dtb_emit_state *dtb = to_dtb(dt);
struct yaml_dt_config *cfg = &dt->cfg;
struct dtb_node *dtbnp = to_dtb_node(np);
struct node *child;
if (dtbnp->phandle != 0 &&
(cfg->object || cfg->symbols ||
is_node_referenced(dt, tree_root(to_tree(dt)), np))) {
if (dtb->legacy_phandles)
add_phandle_prop(dt, np, "linux,phandle");
if (dtb->epapr_phandles)
add_phandle_prop(dt, np, "phandle");
}
for_each_child_of_node(np, child)
append_auto_properties(dt, child);
}
static void generate_noderefs(struct yaml_dt_state *dt, struct node *np)
{
struct dtb_emit_state *dtb = to_dtb(dt);
struct node *child;
struct property *prop;
struct ref *ref;
struct noderef *nr;
bool found;
for_each_property_of_node(np, prop) {
for_each_ref_of_property(prop, ref) {
if (ref->type != r_anchor ||
!to_dt_ref(ref)->is_resolved)
continue;
found = false;
list_for_each_entry(nr, &dtb->noderefs, node) {
if (nr->np == to_dt_ref(ref)->npref) {
found = true;
break;
}
}
if (found)
continue;
nr = malloc(sizeof(*nr));
assert(nr);
nr->np = to_dt_ref(ref)->npref;
list_add_tail(&nr->node, &dtb->noderefs);
}
}
for_each_child_of_node(np, child)
generate_noderefs(dt, child);
}
static void dtb_append_auto_properties(struct yaml_dt_state *dt)
{
if (!tree_root(to_tree(dt)))
return;
generate_noderefs(dt, tree_root(to_tree(dt)));
append_auto_properties(dt, tree_root(to_tree(dt)));
}
static void add_symbols(struct yaml_dt_state *dt, struct node *np,
struct node **symbols_np, struct node **alias_np)
{
struct node *child;
struct property *prop;
struct label *l;
char namebuf[NODE_FULLNAME_MAX];
const char *name;
for_each_label_of_node(np, l) {
/* do not output autogenerated labels */
if (!strncmp(l->label, "yaml_pseudo__",
strlen("yaml_pseudo__")))
continue;
name = dn_fullname(np, namebuf, sizeof(namebuf));
if (dt->cfg.symbols) {
prop = prop_alloc(to_tree(dt), l->label);
prop_append(prop, name, strlen(name), true);
/* if it doesn't exist add __symbols__ */
if (!*symbols_np) {
*symbols_np = node_alloc(to_tree(dt), "__symbols__", NULL);
(*symbols_np)->parent = tree_root(to_tree(dt));
list_add_tail(&(*symbols_np)->node, &tree_root(to_tree(dt))->children);
}
prop->np = *symbols_np;
list_add_tail(&prop->node, &(*symbols_np)->properties);
}
if (dt->cfg.auto_alias) {
prop = prop_alloc(to_tree(dt), l->label);
prop_append(prop, name, strlen(name), true);
/* if it doesn't exist add __symbols__ */
if (!*alias_np) {
*alias_np = node_alloc(to_tree(dt),
"aliases", NULL);
(*alias_np)->parent = tree_root(to_tree(dt));
list_add_tail(&(*alias_np)->node,
&tree_root(to_tree(dt))->children);
}
prop->np = *alias_np;
list_add_tail(&prop->node, &(*alias_np)->properties);
}
}
for_each_child_of_node(np, child) {
/* do not enter generated nodes */
if (!strcmp(child->name, "__symbols__") ||
!strcmp(child->name, "__fixups__") ||
!strcmp(child->name, "__local_fixups__"))
continue;
add_symbols(dt, child, symbols_np, alias_np);
}
}
static void dtb_add_symbols(struct yaml_dt_state *dt)
{
struct tree *t = to_tree(dt);
struct node *symbols_np;
struct node *alias_np;
struct node *root;
root = tree_root(t);
if (!root)
return;
symbols_np = node_get_child_by_name(t, root, "__symbols__", 0);
alias_np = node_get_child_by_name(t, root, "aliases", 0);
add_symbols(dt, root, &symbols_np, &alias_np);
}
static void add_fixup(struct yaml_dt_state *dt, struct ref *ref)
{
struct dtb_emit_state *dtb = to_dtb(dt);
struct fixup *f;
struct ref *reft;
struct dtb_ref *dtbref = to_dtb_ref(ref);
struct dtb_ref *dtbreft;
/* first try to reuse */
list_for_each_entry(f, &dtb->fixups, node) {
list_for_each_entry(dtbreft, &f->refs, ovnode) {
reft = &dtbreft->dt.r;
if (ref->len == reft->len &&
!memcmp(ref->data, reft->data, ref->len)) {
list_add_tail(&dtbref->ovnode, &f->refs);
return;
}
}
}
f = malloc(sizeof(*f));
assert(f);
INIT_LIST_HEAD(&f->refs);
list_add_tail(&dtbref->ovnode, &f->refs);
list_add_tail(&f->node, &dtb->fixups);
}
static void add_fixups(struct yaml_dt_state *dt, struct node *np)
{
struct node *child;
struct property *prop;
struct ref *ref;
char refname[60 + 1];
int refnamelen;
for_each_property_of_node(np, prop) {
for_each_ref_of_property(prop, ref) {
/* adding anchors that were unresolved only */
if (ref->type != r_anchor || to_dt_ref(ref)->is_resolved)
continue;
add_fixup(dt, ref);
/* 60 bytes for a display purposes should be enough */
refnamelen = ref->len > sizeof(refname) ? sizeof(refname) : ref->len;
memcpy(refname, ref->data, refnamelen);
refname[refnamelen] = '\0';
dt_debug(dt, "generate fixup for %s (prop %s, offset %u)\n",
refname, ref->prop->name, to_dtb_ref(ref)->offset);
}
}
for_each_child_of_node(np, child) {
/* do not enter generated nodes */
if (!strcmp(child->name, "__symbols__") ||
!strcmp(child->name, "__fixups__") ||
!strcmp(child->name, "__local_fixups__"))
continue;
add_fixups(dt, child);
}
}
static void dtb_add_fixups(struct yaml_dt_state *dt)
{
struct dtb_emit_state *dtb = to_dtb(dt);
struct node *np;
struct property *prop;
struct dtb_ref *dtbref;
struct ref *ref, *reft;
struct fixup *f;
int ret;
char *name;
char namebuf[NODE_FULLNAME_MAX];
if (!tree_root(to_tree(dt)))
return;
add_fixups(dt, tree_root(to_tree(dt)));
if (list_empty(&dtb->fixups))
return;
/* we have fixups to add, add them */
np = node_alloc(to_tree(dt), "__fixups__", NULL);
np->parent = tree_root(to_tree(dt));
list_add_tail(&np->node, &tree_root(to_tree(dt))->children);
list_for_each_entry(f, &dtb->fixups, node) {
prop = NULL;
list_for_each_entry(dtbref, &f->refs, ovnode) {
ref = &dtbref->dt.r;
/* create property if fist */
if (!prop) {
name = malloc(ref->len + 1);
assert(name);
memcpy(name, ref->data, ref->len);
name[ref->len] = '\0';
prop = prop_alloc(to_tree(dt), name);
prop->np = np;
list_add_tail(&prop->node, &np->properties);
free(name);
name = NULL;
}
ret = asprintf(&name, "%s:%s:%d",
dn_fullname(ref->prop->np, namebuf, sizeof(namebuf)),
ref->prop->name, dtbref->offset);
assert(ret > 0);
reft = ref_alloc(to_tree(dt), r_scalar, name, strlen(name), "!str");
reft->prop = prop;
list_add_tail(&reft->node, &prop->refs);
prop_append(prop, reft->data, reft->len, true);
free(name);
}
}
}
static void add_local_fixup(struct yaml_dt_state *dt, struct ref *ref,
struct node **fixups_np)
{
struct dtb_emit_state *dtb = to_dtb(dt);
struct node *np, *npt;
struct property *prop;
struct ref *reft;
char namebuf[NODE_FULLNAME_MAX];
char *s, *sn;
bool found;
char numbuf[16];
fdt32_t offset;
(void)dtb;
/* start by the fixups node */
np = *fixups_np;
if (!np) {
/* create the local fixups node */
np = node_alloc(to_tree(dt), "__local_fixups__", NULL);
np->parent = tree_root(to_tree(dt));
list_add_tail(&np->node, &tree_root(to_tree(dt))->children);
*fixups_np = np;
}
/* get the full name */
dn_fullname(ref->prop->np, namebuf, sizeof(namebuf));
/* build nodes if not found */
for (s = namebuf + 1; *s; s = sn ? sn : s + strlen(s)) {
sn = strchr(s, '/');
if (sn)
*sn++ = '\0';
found = false;
for_each_child_of_node(np, npt) {
if (!strcmp(npt->name, s)) {
found = true;
break;
}
}
/* not found? create */
if (!found) {
npt = node_alloc(to_tree(dt), s, NULL);
npt->parent = np;
list_add_tail(&npt->node, &np->children);
}
np = npt;
}
found = false;
for_each_property_of_node(np, prop) {
if (!strcmp(prop->name, ref->prop->name)) {
found = true;
break;
}
}
/* not found? create */
if (!found) {
prop = prop_alloc(to_tree(dt), ref->prop->name);
prop->np = np;
list_add_tail(&prop->node, &np->properties);
}
/* create ref */
snprintf(numbuf, sizeof(numbuf), "%u", to_dtb_ref(ref)->offset);
reft = ref_alloc(to_tree(dt), r_scalar, numbuf, strlen(numbuf), "!int");
reft->prop = prop;
list_add_tail(&reft->node, &prop->refs);
/* append offset */
offset = cpu_to_fdt32(to_dtb_ref(ref)->offset);
prop_append(prop, &offset, sizeof(fdt32_t), false);
}
static void add_local_fixups(struct yaml_dt_state *dt, struct node *np,
struct node **fixups_np)
{
struct node *child;
struct property *prop;
struct ref *ref;
char refname[60 + 1];
int refnamelen;
for_each_property_of_node(np, prop) {
for_each_ref_of_property(prop, ref) {
/* adding anchors that were unresolved only */
if (ref->type != r_anchor || !to_dt_ref(ref)->is_resolved)
continue;
add_local_fixup(dt, ref, fixups_np);
/* 60 bytes for a display purposes should be enough */
refnamelen = ref->len > sizeof(refname) ? sizeof(refname) : ref->len;
memcpy(refname, ref->data, refnamelen);
refname[refnamelen] = '\0';
dt_debug(dt, "generate local fixup for %s (prop %s, offset %u)\n",
refname, ref->prop->name, to_dtb_ref(ref)->offset);
}
}
for_each_child_of_node(np, child) {
/* do not enter generated nodes */
if (!strcmp(child->name, "__symbols__") ||
!strcmp(child->name, "__fixups__") ||
!strcmp(child->name, "__local_fixups__"))
continue;
add_local_fixups(dt, child, fixups_np);
}
}
static void dtb_add_local_fixups(struct yaml_dt_state *dt)
{
struct node *np;
if (!tree_root(to_tree(dt)))
return;
np = NULL;
add_local_fixups(dt, tree_root(to_tree(dt)), &np);
}
static void move_tree_contents(struct yaml_dt_state *dt,
struct node *tonp, struct node *fromnp)
{
struct node *child, *childn;
struct property *prop, *propn;
for_each_property_of_node_safe_withdel(fromnp, prop, propn) {
list_del(&prop->node);
prop->np = tonp;
list_add_tail(&prop->node, &tonp->properties);
}
for_each_child_of_node_safe_withdel(fromnp, child, childn) {
list_del(&child->node);
child->parent = tonp;
list_add_tail(&child->node, &tonp->children);
}
}
static void dtb_create_overlay_structure(struct yaml_dt_state *dt)
{
struct node *old_root, *root, *ov, *ovin;
struct node *np, *npn, *npref;
struct list_head *ref_nodes = tree_ref_nodes(to_tree(dt));
struct property *prop;
struct ref *ref;
char namebuf[32];
int next_frag = 1;
/* keep old root */
old_root = tree_root(to_tree(dt));
/* create empty new root */
root = node_alloc(to_tree(dt), "", NULL);
tree_set_root(to_tree(dt), root);
/* create an overlay fragment for the root */