2 * Definitions for talking to the Open Firmware PROM on
3 * Power Macintosh computers.
5 * Copyright (C) 1996 Paul Mackerras.
11 #include <linux/config.h>
13 typedef void *phandle;
14 typedef void *ihandle;
16 extern char *prom_display_paths[];
17 extern unsigned int prom_num_displays;
19 struct address_range {
25 struct interrupt_info {
27 int sense; /* +ve/-ve logic, edge or level, etc. */
39 struct property *next;
43 * Note: don't change this structure for now or you'll break BootX !
50 struct address_range *addrs;
52 struct interrupt_info *intrs;
54 struct property *properties;
55 struct device_node *parent;
56 struct device_node *child;
57 struct device_node *sibling;
58 struct device_node *next; /* next device of same type */
59 struct device_node *allnext; /* next in list of all nodes */
63 typedef void (*prom_entry)(struct prom_args *);
65 /* OBSOLETE: Old style node lookup */
66 extern struct device_node *find_devices(const char *name);
67 extern struct device_node *find_type_devices(const char *type);
68 extern struct device_node *find_path_device(const char *path);
69 extern struct device_node *find_compatible_devices(const char *type,
71 extern struct device_node *find_all_nodes(void);
73 /* New style node lookup */
74 extern struct device_node *of_find_node_by_name(struct device_node *from,
76 extern struct device_node *of_find_node_by_type(struct device_node *from,
78 extern struct device_node *of_find_compatible_node(struct device_node *from,
79 const char *type, const char *compat);
80 extern struct device_node *of_find_node_by_path(const char *path);
81 extern struct device_node *of_find_all_nodes(struct device_node *prev);
82 extern struct device_node *of_get_parent(const struct device_node *node);
83 extern struct device_node *of_get_next_child(const struct device_node *node,
84 struct device_node *prev);
85 extern struct device_node *of_node_get(struct device_node *node);
86 extern void of_node_put(struct device_node *node);
88 /* Other Prototypes */
89 extern void abort(void);
90 extern unsigned long prom_init(int, int, prom_entry);
91 extern void prom_print(const char *msg);
92 extern void relocate_nodes(void);
93 extern void finish_device_tree(void);
94 extern int device_is_compatible(struct device_node *device, const char *);
95 extern int machine_is_compatible(const char *compat);
96 extern unsigned char *get_property(struct device_node *node, const char *name,
98 extern void prom_add_property(struct device_node* np, struct property* prop);
99 extern void prom_get_irq_senses(unsigned char *, int, int);
100 extern int prom_n_addr_cells(struct device_node* np);
101 extern int prom_n_size_cells(struct device_node* np);
103 extern struct resource*
104 request_OF_resource(struct device_node* node, int index, const char* name_postfix);
105 extern int release_OF_resource(struct device_node* node, int index);
107 extern void print_properties(struct device_node *node);
108 extern int call_rtas(const char *service, int nargs, int nret,
109 unsigned long *outputs, ...);
112 * PCI <-> OF matching functions
116 extern int pci_device_from_OF_node(struct device_node *node,
118 extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int);
119 extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
120 extern void pci_create_OF_bus_map(void);
123 * When we call back to the Open Firmware client interface, we usually
124 * have to do that before the kernel is relocated to its final location
125 * (this is because we can't use OF after we have overwritten the
126 * exception vectors with our exception handlers). These macros assist
127 * in performing the address calculations that we need to do to access
128 * data when the kernel is running at an address that is different from
129 * the address that the kernel is linked at. The reloc_offset() function
130 * returns the difference between these two addresses and the macros
131 * simplify the process of adding or subtracting this offset to/from
132 * pointer values. See arch/ppc/kernel/prom.c for how these are used.
134 extern unsigned long reloc_offset(void);
135 extern unsigned long add_reloc_offset(unsigned long);
136 extern unsigned long sub_reloc_offset(unsigned long);
138 #define PTRRELOC(x) ((typeof(x))add_reloc_offset((unsigned long)(x)))
139 #define PTRUNRELOC(x) ((typeof(x))sub_reloc_offset((unsigned long)(x)))
141 #endif /* _PPC_PROM_H */
142 #endif /* __KERNEL__ */