prom.h
上传用户:lgb322
上传日期:2013-02-24
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文件大小:4k
- /*
- * BK Id: SCCS/s.prom.h 1.21 12/01/01 20:09:11 benh
- */
- /*
- * 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 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);
- #define PTRRELOC(x) ((typeof(x))((unsigned long)(x) + offset))
- #define PTRUNRELOC(x) ((typeof(x))((unsigned long)(x) - offset))
- #define RELOC(x) (*PTRRELOC(&(x)))
- #endif /* _PPC_PROM_H */
- #endif /* __KERNEL__ */