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172 lines
5.7 KiB
172 lines
5.7 KiB
/*
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* Definitions for talking to the Open Firmware PROM on
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* Power Macintosh computers.
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*
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* Copyright (C) 1996 Paul Mackerras.
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*/
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#ifdef __KERNEL__
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#ifndef _PPC_PROM_H
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#define _PPC_PROM_H
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#include <linux/config.h>
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#include <linux/types.h>
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typedef u32 phandle;
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typedef u32 ihandle;
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struct address_range {
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unsigned int space;
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unsigned int address;
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unsigned int size;
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};
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struct interrupt_info {
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int line;
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int sense; /* +ve/-ve logic, edge or level, etc. */
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};
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struct reg_property {
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unsigned int address;
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unsigned int size;
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};
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struct property {
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char *name;
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int length;
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unsigned char *value;
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struct property *next;
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};
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/*
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* Note: don't change this structure for now or you'll break BootX !
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*/
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struct device_node {
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char *name;
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char *type;
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phandle node;
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int n_addrs;
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struct address_range *addrs;
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int n_intrs;
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struct interrupt_info *intrs;
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char *full_name;
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struct property *properties;
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struct device_node *parent;
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struct device_node *child;
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struct device_node *sibling;
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struct device_node *next; /* next device of same type */
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struct device_node *allnext; /* next in list of all nodes */
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};
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struct prom_args;
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typedef void (*prom_entry)(struct prom_args *);
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/* OBSOLETE: Old style node lookup */
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extern struct device_node *find_devices(const char *name);
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extern struct device_node *find_type_devices(const char *type);
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extern struct device_node *find_path_device(const char *path);
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extern struct device_node *find_compatible_devices(const char *type,
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const char *compat);
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extern struct device_node *find_all_nodes(void);
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/* New style node lookup */
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extern struct device_node *of_find_node_by_name(struct device_node *from,
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const char *name);
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extern struct device_node *of_find_node_by_type(struct device_node *from,
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const char *type);
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extern struct device_node *of_find_compatible_node(struct device_node *from,
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const char *type, const char *compat);
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extern struct device_node *of_find_node_by_path(const char *path);
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extern struct device_node *of_find_all_nodes(struct device_node *prev);
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extern struct device_node *of_get_parent(const struct device_node *node);
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extern struct device_node *of_get_next_child(const struct device_node *node,
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struct device_node *prev);
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extern struct device_node *of_node_get(struct device_node *node);
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extern void of_node_put(struct device_node *node);
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/* Other Prototypes */
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extern void abort(void);
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extern unsigned long prom_init(int, int, prom_entry);
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extern void prom_print(const char *msg);
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extern void relocate_nodes(void);
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extern void finish_device_tree(void);
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extern int device_is_compatible(struct device_node *device, const char *);
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extern int machine_is_compatible(const char *compat);
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extern unsigned char *get_property(struct device_node *node, const char *name,
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int *lenp);
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extern int prom_add_property(struct device_node* np, struct property* prop);
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extern void prom_get_irq_senses(unsigned char *, int, int);
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extern int prom_n_addr_cells(struct device_node* np);
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extern int prom_n_size_cells(struct device_node* np);
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extern struct resource*
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request_OF_resource(struct device_node* node, int index, const char* name_postfix);
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extern int release_OF_resource(struct device_node* node, int index);
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extern void print_properties(struct device_node *node);
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extern int call_rtas(const char *service, int nargs, int nret,
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unsigned long *outputs, ...);
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/*
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* PCI <-> OF matching functions
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*/
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struct pci_bus;
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struct pci_dev;
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extern int pci_device_from_OF_node(struct device_node *node,
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u8* bus, u8* devfn);
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extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int);
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extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
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extern void pci_create_OF_bus_map(void);
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/*
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* When we call back to the Open Firmware client interface, we usually
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* have to do that before the kernel is relocated to its final location
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* (this is because we can't use OF after we have overwritten the
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* exception vectors with our exception handlers). These macros assist
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* in performing the address calculations that we need to do to access
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* data when the kernel is running at an address that is different from
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* the address that the kernel is linked at. The reloc_offset() function
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* returns the difference between these two addresses and the macros
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* simplify the process of adding or subtracting this offset to/from
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* pointer values. See arch/ppc/kernel/prom.c for how these are used.
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*/
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extern unsigned long reloc_offset(void);
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extern unsigned long add_reloc_offset(unsigned long);
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extern unsigned long sub_reloc_offset(unsigned long);
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#define PTRRELOC(x) ((typeof(x))add_reloc_offset((unsigned long)(x)))
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#define PTRUNRELOC(x) ((typeof(x))sub_reloc_offset((unsigned long)(x)))
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/*
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* OF address retreival & translation
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*/
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/* Translate an OF address block into a CPU physical address
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*/
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#define OF_BAD_ADDR ((u64)-1)
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extern u64 of_translate_address(struct device_node *np, u32 *addr);
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/* Extract an address from a device, returns the region size and
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* the address space flags too. The PCI version uses a BAR number
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* instead of an absolute index
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*/
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extern u32 *of_get_address(struct device_node *dev, int index,
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u64 *size, unsigned int *flags);
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extern u32 *of_get_pci_address(struct device_node *dev, int bar_no,
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u64 *size, unsigned int *flags);
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/* Get an address as a resource. Note that if your address is
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* a PIO address, the conversion will fail if the physical address
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* can't be internally converted to an IO token with
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* pci_address_to_pio(), that is because it's either called to early
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* or it can't be matched to any host bridge IO space
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*/
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extern int of_address_to_resource(struct device_node *dev, int index,
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struct resource *r);
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extern int of_pci_address_to_resource(struct device_node *dev, int bar,
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struct resource *r);
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#endif /* _PPC_PROM_H */
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#endif /* __KERNEL__ */
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