fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-sparc64 / mdesc.h
blob1acc7272e537bca1bfe095ea24e518b32d837a9b
1 #ifndef _SPARC64_MDESC_H
2 #define _SPARC64_MDESC_H
4 #include <linux/types.h>
5 #include <linux/cpumask.h>
6 #include <asm/prom.h>
8 struct mdesc_handle;
10 /* Machine description operations are to be surrounded by grab and
11 * release calls. The mdesc_handle returned from the grab is
12 * the first argument to all of the operational calls that work
13 * on mdescs.
15 extern struct mdesc_handle *mdesc_grab(void);
16 extern void mdesc_release(struct mdesc_handle *);
18 #define MDESC_NODE_NULL (~(u64)0)
20 extern u64 mdesc_node_by_name(struct mdesc_handle *handle,
21 u64 from_node, const char *name);
22 #define mdesc_for_each_node_by_name(__hdl, __node, __name) \
23 for (__node = mdesc_node_by_name(__hdl, MDESC_NODE_NULL, __name); \
24 (__node) != MDESC_NODE_NULL; \
25 __node = mdesc_node_by_name(__hdl, __node, __name))
27 /* Access to property values returned from mdesc_get_property() are
28 * only valid inside of a mdesc_grab()/mdesc_release() sequence.
29 * Once mdesc_release() is called, the memory backed up by these
30 * pointers may reference freed up memory.
32 * Therefore callers must make copies of any property values
33 * they need.
35 * These same rules apply to mdesc_node_name().
37 extern const void *mdesc_get_property(struct mdesc_handle *handle,
38 u64 node, const char *name, int *lenp);
39 extern const char *mdesc_node_name(struct mdesc_handle *hp, u64 node);
41 /* MD arc iteration, the standard sequence is:
43 * unsigned long arc;
44 * mdesc_for_each_arc(arc, handle, node, MDESC_ARC_TYPE_{FWD,BACK}) {
45 * unsigned long target = mdesc_arc_target(handle, arc);
46 * ...
47 * }
50 #define MDESC_ARC_TYPE_FWD "fwd"
51 #define MDESC_ARC_TYPE_BACK "back"
53 extern u64 mdesc_next_arc(struct mdesc_handle *handle, u64 from,
54 const char *arc_type);
55 #define mdesc_for_each_arc(__arc, __hdl, __node, __type) \
56 for (__arc = mdesc_next_arc(__hdl, __node, __type); \
57 (__arc) != MDESC_NODE_NULL; \
58 __arc = mdesc_next_arc(__hdl, __arc, __type))
60 extern u64 mdesc_arc_target(struct mdesc_handle *hp, u64 arc);
62 extern void mdesc_update(void);
64 struct mdesc_notifier_client {
65 void (*add)(struct mdesc_handle *handle, u64 node);
66 void (*remove)(struct mdesc_handle *handle, u64 node);
68 const char *node_name;
69 struct mdesc_notifier_client *next;
72 extern void mdesc_register_notifier(struct mdesc_notifier_client *client);
74 extern void mdesc_fill_in_cpu_data(cpumask_t mask);
76 extern void sun4v_mdesc_init(void);
78 #endif