/* Return the next sibling of this node or 0. */
static phandle_t
ofw_fdt_peer(ofw_t ofw, phandle_t node)
{
int depth, offset;
if (node == 0) {
/* Find root node */
offset = fdt_path_offset(fdtp, "/");
return (fdt_offset_phandle(offset));
}
offset = fdt_phandle_offset(node);
if (offset < 0)
return (0);
for (depth = 1, offset = fdt_next_node(fdtp, offset, &depth);
offset >= 0;
offset = fdt_next_node(fdtp, offset, &depth)) {
if (depth < 0)
return (0);
if (depth == 1)
return (fdt_offset_phandle(offset));
}
return (0);
}
/* Get the length of a property of a package. */
static ssize_t
ofw_fdt_getproplen(ofw_t ofw, phandle_t package, const char *propname)
{
const struct fdt_property *prop;
int offset, len;
offset = fdt_phandle_offset(package);
if (offset < 0)
return (-1);
len = -1;
prop = fdt_get_property(fdtp, offset, propname, &len);
if (prop == NULL && strcmp(propname, "name") == 0) {
/* Emulate the 'name' property */
fdt_get_name(fdtp, offset, &len);
return (len + 1);
}
if (prop == NULL && offset == fdt_path_offset(fdtp, "/chosen")) {
if (strcmp(propname, "fdtbootcpu") == 0)
return (sizeof(cell_t));
if (strcmp(propname, "fdtmemreserv") == 0)
return (sizeof(uint64_t)*2*fdt_num_mem_rsv(fdtp));
}
if (prop == NULL)
return (-1);
return (len);
}
/*
* Get the next property of a package. Return the actual len of retrieved
* prop name.
*/
static int
ofw_fdt_nextprop(ofw_t ofw, phandle_t package, const char *previous, char *buf,
size_t size)
{
const struct fdt_property *prop;
int offset, rv;
offset = fdt_phandle_offset(package);
if (offset < 0)
return (-1);
if (previous == NULL)
/* Find the first prop in the node */
return (fdt_nextprop(offset, buf, size));
/*
* Advance to the previous prop
*/
prop = fdt_get_property(fdtp, offset, previous, NULL);
if (prop == NULL)
return (-1);
offset = fdt_pointer_offset(prop);
rv = fdt_nextprop(offset, buf, size);
return (rv);
}
/* Get the value of a property of a package. */
static ssize_t
ofw_fdt_getprop(ofw_t ofw, phandle_t package, const char *propname, void *buf,
size_t buflen)
{
const void *prop;
const char *name;
int len, offset;
offset = fdt_phandle_offset(package);
if (offset < 0)
return (-1);
if (strcmp(propname, "name") == 0) {
/* Emulate the 'name' property */
name = fdt_get_name(fdtp, offset, &len);
strncpy(buf, name, buflen);
if (len + 1 > buflen)
len = buflen;
return (len + 1);
}
prop = fdt_getprop(fdtp, offset, propname, &len);
if (prop == NULL)
return (-1);
if (len > buflen)
len = buflen;
bcopy(prop, buf, len);
return (len);
}
/* Set the value of a property of a package. */
static int
ofw_fdt_setprop(ofw_t ofw, phandle_t package, const char *propname,
const void *buf, size_t len)
{
int offset;
offset = fdt_phandle_offset(package);
if (offset < 0)
return (-1);
return (fdt_setprop_inplace(fdtp, offset, propname, buf, len));
}
/* Return the parent of this node or 0. */
static phandle_t
ofw_fdt_parent(ofw_t ofw, phandle_t node)
{
int offset, paroffset;
offset = fdt_phandle_offset(node);
if (offset < 0)
return (0);
paroffset = fdt_parent_offset(fdtp, offset);
return (fdt_offset_phandle(paroffset));
}
/* Get the value of a property of a package. */
static ssize_t
ofw_fdt_getprop(ofw_t ofw, phandle_t package, const char *propname, void *buf,
size_t buflen)
{
const void *prop;
const char *name;
int len, offset;
uint32_t cpuid;
offset = fdt_phandle_offset(package);
if (offset < 0)
return (-1);
prop = fdt_getprop(fdtp, offset, propname, &len);
if (prop == NULL && strcmp(propname, "name") == 0) {
/* Emulate the 'name' property */
name = fdt_get_name(fdtp, offset, &len);
strncpy(buf, name, buflen);
if (len + 1 > buflen)
len = buflen;
return (len + 1);
}
if (prop == NULL && offset == fdt_path_offset(fdtp, "/chosen")) {
if (strcmp(propname, "fdtbootcpu") == 0) {
cpuid = cpu_to_fdt32(fdt_boot_cpuid_phys(fdtp));
len = sizeof(cpuid);
prop = &cpuid;
}
if (strcmp(propname, "fdtmemreserv") == 0) {
prop = (char *)fdtp + fdt_off_mem_rsvmap(fdtp);
len = sizeof(uint64_t)*2*fdt_num_mem_rsv(fdtp);
}
}
if (prop == NULL)
return (-1);
if (len > buflen)
len = buflen;
bcopy(prop, buf, len);
return (len);
}
/*
* Get the next property of a package. Return values:
* -1: package or previous property does not exist
* 0: no more properties
* 1: success
*/
static int
ofw_fdt_nextprop(ofw_t ofw, phandle_t package, const char *previous, char *buf,
size_t size)
{
const struct fdt_property *prop;
const char *name;
int offset;
offset = fdt_phandle_offset(package);
if (offset < 0)
return (-1);
/* Find the first prop in the node */
offset = fdt_first_property_offset(fdtp, offset);
if (offset < 0)
return (0); /* No properties */
if (previous != NULL) {
while (offset >= 0) {
prop = fdt_get_property_by_offset(fdtp, offset, NULL);
if (prop == NULL)
return (-1); /* Internal error */
offset = fdt_next_property_offset(fdtp, offset);
if (offset < 0)
return (0); /* No more properties */
/* Check if the last one was the one we wanted */
name = fdt_string(fdtp, fdt32_to_cpu(prop->nameoff));
if (strcmp(name, previous) == 0)
break;
}
}
prop = fdt_get_property_by_offset(fdtp, offset, &offset);
if (prop == NULL)
return (-1); /* Internal error */
strncpy(buf, fdt_string(fdtp, fdt32_to_cpu(prop->nameoff)), size);
return (1);
}
/* Return the first child of this node or 0. */
static phandle_t
ofw_fdt_child(ofw_t ofw, phandle_t node)
{
int depth, offset;
offset = fdt_phandle_offset(node);
if (offset < 0)
return (0);
for (depth = 0, offset = fdt_next_node(fdtp, offset, &depth);
(offset >= 0) && (depth > 0);
offset = fdt_next_node(fdtp, offset, &depth)) {
if (depth < 0)
return (0);
if (depth == 1)
return (fdt_offset_phandle(offset));
}
return (0);
}
/* Get the length of a property of a package. */
static ssize_t
ofw_fdt_getproplen(ofw_t ofw, phandle_t package, const char *propname)
{
const struct fdt_property *prop;
int offset, len;
offset = fdt_phandle_offset(package);
if (offset < 0)
return (-1);
if (strcmp(propname, "name") == 0) {
/* Emulate the 'name' property */
fdt_get_name(fdtp, offset, &len);
return (len + 1);
}
len = -1;
prop = fdt_get_property(fdtp, offset, propname, &len);
return (len);
}
