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Diffstat (limited to 'include/asm-sparc64/mdesc.h')
-rw-r--r--include/asm-sparc64/mdesc.h88
1 files changed, 58 insertions, 30 deletions
diff --git a/include/asm-sparc64/mdesc.h b/include/asm-sparc64/mdesc.h
index c6383982b53..e97c4313375 100644
--- a/include/asm-sparc64/mdesc.h
+++ b/include/asm-sparc64/mdesc.h
@@ -2,38 +2,66 @@
#define _SPARC64_MDESC_H
#include <linux/types.h>
+#include <linux/cpumask.h>
#include <asm/prom.h>
-struct mdesc_node;
-struct mdesc_arc {
- const char *name;
- struct mdesc_node *arc;
-};
-
-struct mdesc_node {
- const char *name;
- u64 node;
- unsigned int unique_id;
- unsigned int num_arcs;
- unsigned int irqs[2];
- struct property *properties;
- struct mdesc_node *hash_next;
- struct mdesc_node *allnodes_next;
- struct mdesc_arc arcs[0];
-};
-
-extern struct mdesc_node *md_find_node_by_name(struct mdesc_node *from,
- const char *name);
-#define md_for_each_node_by_name(__mn, __name) \
- for (__mn = md_find_node_by_name(NULL, __name); __mn; \
- __mn = md_find_node_by_name(__mn, __name))
-
-extern struct property *md_find_property(const struct mdesc_node *mp,
- const char *name,
- int *lenp);
-extern const void *md_get_property(const struct mdesc_node *mp,
- const char *name,
- int *lenp);
+struct mdesc_handle;
+
+/* Machine description operations are to be surrounded by grab and
+ * release calls. The mdesc_handle returned from the grab is
+ * the first argument to all of the operational calls that work
+ * on mdescs.
+ */
+extern struct mdesc_handle *mdesc_grab(void);
+extern void mdesc_release(struct mdesc_handle *);
+
+#define MDESC_NODE_NULL (~(u64)0)
+
+extern u64 mdesc_node_by_name(struct mdesc_handle *handle,
+ u64 from_node, const char *name);
+#define mdesc_for_each_node_by_name(__hdl, __node, __name) \
+ for (__node = mdesc_node_by_name(__hdl, MDESC_NODE_NULL, __name); \
+ (__node) != MDESC_NODE_NULL; \
+ __node = mdesc_node_by_name(__hdl, __node, __name))
+
+/* Access to property values returned from mdesc_get_property() are
+ * only valid inside of a mdesc_grab()/mdesc_release() sequence.
+ * Once mdesc_release() is called, the memory backed up by these
+ * pointers may reference freed up memory.
+ *
+ * Therefore callers must make copies of any property values
+ * they need.
+ *
+ * These same rules apply to mdesc_node_name().
+ */
+extern const void *mdesc_get_property(struct mdesc_handle *handle,
+ u64 node, const char *name, int *lenp);
+extern const char *mdesc_node_name(struct mdesc_handle *hp, u64 node);
+
+/* MD arc iteration, the standard sequence is:
+ *
+ * unsigned long arc;
+ * mdesc_for_each_arc(arc, handle, node, MDESC_ARC_TYPE_{FWD,BACK}) {
+ * unsigned long target = mdesc_arc_target(handle, arc);
+ * ...
+ * }
+ */
+
+#define MDESC_ARC_TYPE_FWD "fwd"
+#define MDESC_ARC_TYPE_BACK "back"
+
+extern u64 mdesc_next_arc(struct mdesc_handle *handle, u64 from,
+ const char *arc_type);
+#define mdesc_for_each_arc(__arc, __hdl, __node, __type) \
+ for (__arc = mdesc_next_arc(__hdl, __node, __type); \
+ (__arc) != MDESC_NODE_NULL; \
+ __arc = mdesc_next_arc(__hdl, __arc, __type))
+
+extern u64 mdesc_arc_target(struct mdesc_handle *hp, u64 arc);
+
+extern void mdesc_update(void);
+
+extern void mdesc_fill_in_cpu_data(cpumask_t mask);
extern void sun4v_mdesc_init(void);