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[POWERPC] bootwrapper: Add ft_root_node(). 

Clean up some of the open-coded data structure references by providing a
function to return a pointer to the tree's root node.  This is only used
in high-level functions trying to access the root of the tree, not in
low-level code that is actually manipulating the data structure.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: Mark A. Greer <mgreer@mvista.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Scott Wood 2007-03-12 14:41:42 -06:00 committed by Paul Mackerras
parent ce3edb30ec
commit 7c71c04625
1 changed files with 9 additions and 4 deletions
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13
arch/powerpc/boot/flatdevtree.c
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@ -29,6 +29,11 @@
#define _ALIGN(x, al) (((x) + (al) - 1) & ~((al) - 1))
static char *ft_root_node(struct ft_cxt *cxt)
{
return cxt->rgn[FT_STRUCT].start;
}
/* Routines for keeping node ptrs returned by ft_find_device current */
/* First entry not used b/c it would return 0 and be taken as NULL/error */
static void *ft_node_add(struct ft_cxt *cxt, char *node)
@ -590,7 +595,7 @@ int ft_add_rsvmap(struct ft_cxt *cxt, u64 physaddr, u64 size)
void ft_begin_tree(struct ft_cxt *cxt)
{
cxt->p = cxt->rgn[FT_STRUCT].start;
cxt->p = ft_root_node(cxt);
}
void ft_end_tree(struct ft_cxt *cxt)
@ -636,7 +641,7 @@ void *ft_find_device(struct ft_cxt *cxt, const char *srch_path)
/* require absolute path */
if (srch_path[0] != '/')
return NULL;
node = ft_find_descendent(cxt, cxt->rgn[FT_STRUCT].start, srch_path);
node = ft_find_descendent(cxt, ft_root_node(cxt), srch_path);
return ft_node_add(cxt, node);
}
@ -717,7 +722,7 @@ void *ft_get_parent(struct ft_cxt *cxt, const void *phandle)
return cxt->genealogy[d > 0 ? d - 1 : 0];
/* have to do it the hard way... */
p = cxt->rgn[FT_STRUCT].start;
p = ft_root_node(cxt);
d = 0;
while ((p = ft_next(cxt, p, &atom)) != NULL) {
switch (atom.tag) {
@ -855,7 +860,7 @@ void *ft_create_node(struct ft_cxt *cxt, const void *parent, const char *path)
char *p, *next;
int depth = 0;
p = cxt->rgn[FT_STRUCT].start;
p = ft_root_node(cxt);
while ((next = ft_next(cxt, p, &atom)) != NULL) {
switch (atom.tag) {
case OF_DT_BEGIN_NODE: