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[POWERPC] bootwrapper: Add ft_find_node_by_prop_value().

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ft_find_node_by_prop_value() finds nodes with the specified
property/value pair.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Scott Wood 2007-03-12 14:41:58 -06:00 committed by Paul Mackerras
parent a9ec7669fc
commit 8941c0c495
2 changed files with 68 additions and 0 deletions
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65
arch/powerpc/boot/flatdevtree.c
View File

@ -820,6 +820,71 @@ int ft_get_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
return -1;
}
void *__ft_find_node_by_prop_value(struct ft_cxt *cxt, void *prev,
const char *propname, const char *propval,
unsigned int proplen)
{
struct ft_atom atom;
char *p = ft_root_node(cxt);
char *next;
int past_prev = prev ? 0 : 1;
int depth = -1;
while ((next = ft_next(cxt, p, &atom)) != NULL) {
const void *data;
unsigned int size;
switch (atom.tag) {
case OF_DT_BEGIN_NODE:
depth++;
if (prev == p) {
past_prev = 1;
break;
}
if (!past_prev || depth < 1)
break;
data = __ft_get_prop(cxt, p, propname, &size);
if (!data || size != proplen)
break;
if (memcmp(data, propval, size))
break;
return p;
case OF_DT_END_NODE:
if (depth-- == 0)
return NULL;
break;
}
p = next;
}
return NULL;
}
void *ft_find_node_by_prop_value(struct ft_cxt *cxt, const void *prev,
const char *propname, const char *propval,
int proplen)
{
void *node = NULL;
if (prev) {
node = ft_node_ph2node(cxt, prev);
if (!node)
return NULL;
}
node = __ft_find_node_by_prop_value(cxt, node, propname,
propval, proplen);
return ft_get_phandle(cxt, node);
}
int ft_set_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
const void *buf, const unsigned int buflen)
{

3
arch/powerpc/boot/flatdevtree.h
View File

@ -105,5 +105,8 @@ int ft_get_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
int ft_set_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
const void *buf, const unsigned int buflen);
void *ft_get_parent(struct ft_cxt *cxt, const void *phandle);
void *ft_find_node_by_prop_value(struct ft_cxt *cxt, const void *prev,
const char *propname, const char *propval,
int proplen);
#endif /* FLATDEVTREE_H */