d1405b8698
Parsing addresses extracted from Open Firmware isn't a simple matter. We have various bits of code that try to do it in various place, including some heuristics in prom.c that pre-parse addresses at boot and fill device-nodes "addrs", but those are dodgy at best and I want to deprecate them. So this patch introduces a new set of routines that should be capable of parsing most types of addresses and translating them into CPU physical addresses. It currently works for things on PCI busses and ISA busses and should work on "standard" busses like the root bus or the MacIO bus that don't put funky flags in addresses. If you have other bus types that do use funky flags, you'll have to add new bus type translators, which is fairly easy. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
151 lines
4.9 KiB
C
151 lines
4.9 KiB
C
/*
|
|
* 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)))
|
|
|
|
|
|
/*
|
|
* Address translation function(s)
|
|
*/
|
|
#define OF_BAD_ADDR ((u64)-1)
|
|
extern u64 of_translate_address(struct device_node *np, u32 *addr);
|
|
extern u32 *of_get_address(struct device_node *dev, int index, u64 *size);
|
|
extern u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size);
|
|
|
|
|
|
#endif /* _PPC_PROM_H */
|
|
#endif /* __KERNEL__ */
|