/* * 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> #include <linux/types.h> typedef u32 phandle; typedef u32 ihandle; 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 *); /* OBSOLETE: Old style node lookup */ 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); /* New style node lookup */ extern struct device_node *of_find_node_by_name(struct device_node *from, const char *name); extern struct device_node *of_find_node_by_type(struct device_node *from, const char *type); extern struct device_node *of_find_compatible_node(struct device_node *from, const char *type, const char *compat); extern struct device_node *of_find_node_by_path(const char *path); extern struct device_node *of_find_all_nodes(struct device_node *prev); extern struct device_node *of_get_parent(const struct device_node *node); extern struct device_node *of_get_next_child(const struct device_node *node, struct device_node *prev); extern struct device_node *of_node_get(struct device_node *node); extern void of_node_put(struct device_node *node); /* Other 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 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 int 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, ...); /* * PCI <-> OF matching functions */ struct pci_bus; struct pci_dev; extern int pci_device_from_OF_node(struct device_node *node, u8* bus, u8* devfn); extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int); extern struct device_node* pci_device_to_OF_node(struct pci_dev *); extern void pci_create_OF_bus_map(void); /* * 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))) /* * OF address retreival & translation */ /* Translate an OF address block into a CPU physical address */ #define OF_BAD_ADDR ((u64)-1) extern u64 of_translate_address(struct device_node *np, u32 *addr); /* Extract an address from a device, returns the region size and * the address space flags too. The PCI version uses a BAR number * instead of an absolute index */ extern u32 *of_get_address(struct device_node *dev, int index, u64 *size, unsigned int *flags); extern u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size, unsigned int *flags); /* Get an address as a resource. Note that if your address is * a PIO address, the conversion will fail if the physical address * can't be internally converted to an IO token with * pci_address_to_pio(), that is because it's either called to early * or it can't be matched to any host bridge IO space */ extern int of_address_to_resource(struct device_node *dev, int index, struct resource *r); extern int of_pci_address_to_resource(struct device_node *dev, int bar, struct resource *r); #endif /* _PPC_PROM_H */ #endif /* __KERNEL__ */