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/*

 * Definitions for talking to the Open Firmware PROM on

 * Power Macintosh computers.

 *

 * Copyright (C) 1996 Paul Mackerras.

 */

#ifdef __KERNEL__

#ifndef _PPC_PROM_H

#define _PPC_PROM_H

#include <linux/config.h>

typedef void *phandle;

typedef void *ihandle;

extern char *prom_display_paths[];

extern unsigned int prom_num_displays;

struct address_range {

        unsigned int space;

        unsigned int address;

        unsigned int size;

};

struct interrupt_info {

        int     line;

        int     sense;          /* +ve/-ve logic, edge or level, etc. */

};

struct reg_property {

        unsigned int address;

        unsigned int size;

};

struct property {

        char    *name;

        int     length;

        unsigned char *value;

        struct property *next;

};

/*

 * Note: don't change this structure for now or you'll break BootX !

 */

struct device_node {

        char    *name;

        char    *type;

        phandle node;

        int     n_addrs;

        struct  address_range *addrs;

        int     n_intrs;

        struct  interrupt_info *intrs;

        char    *full_name;

        struct  property *properties;

        struct  device_node *parent;

        struct  device_node *child;

        struct  device_node *sibling;

        struct  device_node *next;      /* next device of same type */

        struct  device_node *allnext;   /* next in list of all nodes */

};

struct prom_args;

typedef void (*prom_entry)(struct prom_args *);

/* Prototypes */

extern void abort(void);

extern unsigned long prom_init(int, int, prom_entry);

extern void prom_print(const char *msg);

extern void relocate_nodes(void);

extern void finish_device_tree(void);

extern struct device_node *find_devices(const char *name);

extern struct device_node *find_type_devices(const char *type);

extern struct device_node *find_path_device(const char *path);

extern struct device_node *find_compatible_devices(const char *type,

                                                   const char *compat);

extern struct device_node *find_all_nodes(void);

extern struct device_node *find_phandle(phandle);

extern int device_is_compatible(struct device_node *device, const char *);

extern int machine_is_compatible(const char *compat);

extern unsigned char *get_property(struct device_node *node, const char *name,

                                   int *lenp);

extern void prom_add_property(struct device_node* np, struct property* prop);

extern void prom_get_irq_senses(unsigned char *, int, int);

extern int prom_n_addr_cells(struct device_node* np);

extern int prom_n_size_cells(struct device_node* np);

extern struct resource*

request_OF_resource(struct device_node* node, int index, const char* name_postfix);

extern int release_OF_resource(struct device_node* node, int index);

extern void print_properties(struct device_node *node);

extern int call_rtas(const char *service, int nargs, int nret,

                     unsigned long *outputs, ...);

/*

 * When we call back to the Open Firmware client interface, we usually

 * have to do that before the kernel is relocated to its final location

 * (this is because we can't use OF after we have overwritten the

 * exception vectors with our exception handlers).  These macros assist

 * in performing the address calculations that we need to do to access

 * data when the kernel is running at an address that is different from

 * the address that the kernel is linked at.  The reloc_offset() function

 * returns the difference between these two addresses and the macros

 * simplify the process of adding or subtracting this offset to/from

 * pointer values.  See arch/ppc/kernel/prom.c for how these are used.

 */

extern unsigned long reloc_offset(void);

extern unsigned long add_reloc_offset(unsigned long);

extern unsigned long sub_reloc_offset(unsigned long);

#define PTRRELOC(x)     ((typeof(x))add_reloc_offset((unsigned long)(x)))

#define PTRUNRELOC(x)   ((typeof(x))sub_reloc_offset((unsigned long)(x)))

#endif /* _PPC_PROM_H */

#endif /* __KERNEL__ */