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/*
* BK Id: %F% %I% %G% %U% %#%
*/
/*
* 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__ */
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