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authorScott Wood <scottwood@freescale.com>2007-09-06 05:21:12 +1000
committerPaul Mackerras <paulus@samba.org>2007-09-14 01:33:23 +1000
commit21f3fe2f7ab57832ea1fc7f719ec7e167b7ad80e (patch)
tree5a3bf3c623fb858d61ca7effd9b1f8bd8b5e714f
parent9de782770b84768e1aa2e6454223ef30768de84e (diff)
[POWERPC] bootwrapper: Add get_path()
This will be used by the PlanetCore firmware support to construct a linux,stdout-path from the serial node that it finds. Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
-rw-r--r--arch/powerpc/boot/flatdevtree.c59
-rw-r--r--arch/powerpc/boot/flatdevtree.h1
-rw-r--r--arch/powerpc/boot/flatdevtree_misc.c6
-rw-r--r--arch/powerpc/boot/ops.h9
4 files changed, 75 insertions, 0 deletions
diff --git a/arch/powerpc/boot/flatdevtree.c b/arch/powerpc/boot/flatdevtree.c
index 0af7291fc67..cf30675c611 100644
--- a/arch/powerpc/boot/flatdevtree.c
+++ b/arch/powerpc/boot/flatdevtree.c
@@ -975,3 +975,62 @@ void *ft_create_node(struct ft_cxt *cxt, const void *parent, const char *name)
}
return NULL;
}
+
+/* Returns the start of the path within the provided buffer, or NULL on
+ * error.
+ */
+char *ft_get_path(struct ft_cxt *cxt, const void *phandle,
+ char *buf, int len)
+{
+ const char *path_comp[FT_MAX_DEPTH];
+ struct ft_atom atom;
+ char *p, *next, *pos;
+ int depth = 0, i;
+ void *node;
+
+ node = ft_node_ph2node(cxt, phandle);
+ if (node == NULL)
+ return NULL;
+
+ p = ft_root_node(cxt);
+
+ while ((next = ft_next(cxt, p, &atom)) != NULL) {
+ switch (atom.tag) {
+ case OF_DT_BEGIN_NODE:
+ path_comp[depth++] = atom.name;
+ if (p == node)
+ goto found;
+
+ break;
+
+ case OF_DT_END_NODE:
+ if (--depth == 0)
+ return NULL;
+ }
+
+ p = next;
+ }
+
+found:
+ pos = buf;
+ for (i = 1; i < depth; i++) {
+ int this_len;
+
+ if (len <= 1)
+ return NULL;
+
+ *pos++ = '/';
+ len--;
+
+ strncpy(pos, path_comp[i], len);
+
+ if (pos[len - 1] != 0)
+ return NULL;
+
+ this_len = strlen(pos);
+ len -= this_len;
+ pos += this_len;
+ }
+
+ return buf;
+}
diff --git a/arch/powerpc/boot/flatdevtree.h b/arch/powerpc/boot/flatdevtree.h
index 2c1c826c4ec..b0957a2d967 100644
--- a/arch/powerpc/boot/flatdevtree.h
+++ b/arch/powerpc/boot/flatdevtree.h
@@ -108,5 +108,6 @@ void *ft_find_node_by_prop_value(struct ft_cxt *cxt, const void *prev,
const char *propname, const char *propval,
int proplen);
void *ft_create_node(struct ft_cxt *cxt, const void *parent, const char *name);
+char *ft_get_path(struct ft_cxt *cxt, const void *phandle, char *buf, int len);
#endif /* FLATDEVTREE_H */
diff --git a/arch/powerpc/boot/flatdevtree_misc.c b/arch/powerpc/boot/flatdevtree_misc.c
index 8d1debe8d94..b3670096fa7 100644
--- a/arch/powerpc/boot/flatdevtree_misc.c
+++ b/arch/powerpc/boot/flatdevtree_misc.c
@@ -58,6 +58,11 @@ static unsigned long fdtm_finalize(void)
return (unsigned long)cxt.bph;
}
+static char *fdtm_get_path(const void *phandle, char *buf, int len)
+{
+ return ft_get_path(&cxt, phandle, buf, len);
+}
+
int ft_init(void *dt_blob, unsigned int max_size, unsigned int max_find_device)
{
dt_ops.finddevice = fdtm_finddevice;
@@ -67,6 +72,7 @@ int ft_init(void *dt_blob, unsigned int max_size, unsigned int max_find_device)
dt_ops.create_node = fdtm_create_node;
dt_ops.find_node_by_prop_value = fdtm_find_node_by_prop_value;
dt_ops.finalize = fdtm_finalize;
+ dt_ops.get_path = fdtm_get_path;
return ft_open(&cxt, dt_blob, max_size, max_find_device,
platform_ops.realloc);
diff --git a/arch/powerpc/boot/ops.h b/arch/powerpc/boot/ops.h
index 45c2268d5c5..703255bf008 100644
--- a/arch/powerpc/boot/ops.h
+++ b/arch/powerpc/boot/ops.h
@@ -47,6 +47,7 @@ struct dt_ops {
const char *propname,
const char *propval, int proplen);
unsigned long (*finalize)(void);
+ char *(*get_path)(const void *phandle, char *buf, int len);
};
extern struct dt_ops dt_ops;
@@ -170,6 +171,14 @@ static inline void *find_node_by_linuxphandle(const u32 linuxphandle)
(char *)&linuxphandle, sizeof(u32));
}
+static inline char *get_path(const void *phandle, char *buf, int len)
+{
+ if (dt_ops.get_path)
+ return dt_ops.get_path(phandle, buf, len);
+
+ return NULL;
+}
+
static inline void *malloc(unsigned long size)
{
return (platform_ops.malloc) ? platform_ops.malloc(size) : NULL;