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[POWERPC] bootwrapper: Refactor ft_get_prop() into internal and external functions.

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The property searching part of ft_get_prop is factored out into an
internal __ft_get_prop() which does not deal with phandles and does not
copy the property data.  ft_get_prop() is then a wrapper that does the
phandle translation and copying.

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 14:41:54 -06:00 committed by Paul Mackerras
parent fc58341161
commit c350038b2b
1 changed files with 34 additions and 19 deletions
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53
arch/powerpc/boot/flatdevtree.c
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@ -765,38 +765,53 @@ void *ft_get_parent(struct ft_cxt *cxt, const void *phandle)
return NULL;
}
int ft_get_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
void *buf, const unsigned int buflen)
static const void *__ft_get_prop(struct ft_cxt *cxt, void *node,
const char *propname, unsigned int *len)
{
struct ft_atom atom;
void *node;
char *p;
int depth;
unsigned int size;
int depth = 0;
node = ft_node_ph2node(cxt, phandle);
if (node == NULL)
return -1;
depth = 0;
p = (char *)node;
while ((p = ft_next(cxt, p, &atom)) != NULL) {
while ((node = ft_next(cxt, node, &atom)) != NULL) {
switch (atom.tag) {
case OF_DT_BEGIN_NODE:
++depth;
break;
case OF_DT_PROP:
if ((depth != 1) || strcmp(atom.name, propname))
if (depth != 1 || strcmp(atom.name, propname))
break;
size = min(atom.size, buflen);
memcpy(buf, atom.data, size);
return atom.size;
if (len)
*len = atom.size;
return atom.data;
case OF_DT_END_NODE:
if (--depth <= 0)
return -1;
return NULL;
}
}
return NULL;
}
int ft_get_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
void *buf, const unsigned int buflen)
{
const void *data;
unsigned int size;
void *node = ft_node_ph2node(cxt, phandle);
if (!node)
return -1;
data = __ft_get_prop(cxt, node, propname, &size);
if (data) {
unsigned int clipped_size = min(size, buflen);
memcpy(buf, data, clipped_size);
return size;
}
return -1;
}