1 #ifndef _SPARC64_MDESC_H 2 #define _SPARC64_MDESC_H 3 4 #include <linux/types.h> 5 #include <linux/cpumask.h> 6 #include <asm/prom.h> 7 8 struct mdesc_handle; 9 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. 14 */ 15 extern struct mdesc_handle *mdesc_grab(void); 16 extern void mdesc_release(struct mdesc_handle *); 17 18 #define MDESC_NODE_NULL (~(u64)0) 19 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)) 26 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. 31 * 32 * Therefore callers must make copies of any property values 33 * they need. 34 * 35 * These same rules apply to mdesc_node_name(). 36 */ 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); 40 41 /* MD arc iteration, the standard sequence is: 42 * 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 * } 48 */ 49 50 #define MDESC_ARC_TYPE_FWD "fwd" 51 #define MDESC_ARC_TYPE_BACK "back" 52 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)) 59 60 extern u64 mdesc_arc_target(struct mdesc_handle *hp, u64 arc); 61 62 extern void mdesc_update(void); 63 64 struct mdesc_notifier_client { 65 void (*add)(struct mdesc_handle *handle, u64 node); 66 void (*remove)(struct mdesc_handle *handle, u64 node); 67 68 const char *node_name; 69 struct mdesc_notifier_client *next; 70 }; 71 72 extern void mdesc_register_notifier(struct mdesc_notifier_client *client); 73 74 extern void mdesc_fill_in_cpu_data(cpumask_t *mask); 75 extern void mdesc_populate_present_mask(cpumask_t *mask); 76 77 extern void sun4v_mdesc_init(void); 78 79 #endif 80