[linux.git] / include / asm-powerpc / prom.h

#ifndef _POWERPC_PROM_H
#define _POWERPC_PROM_H
#ifdef __KERNEL__

/*
 * Definitions for talking to the Open Firmware PROM on
 * Power Macintosh computers.
 *
 * Copyright (C) 1996-2005 Paul Mackerras.
 *
 * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/platform_device.h>
#include <asm/irq.h>
#include <asm/atomic.h>

#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT	1
#define OF_ROOT_NODE_SIZE_CELLS_DEFAULT	1

#define of_compat_cmp(s1, s2, l)	strcasecmp((s1), (s2))
#define of_prop_cmp(s1, s2)		strcmp((s1), (s2))
#define of_node_cmp(s1, s2)		strcasecmp((s1), (s2))

/* Definitions used by the flattened device tree */
#define OF_DT_HEADER		0xd00dfeed	/* marker */
#define OF_DT_BEGIN_NODE	0x1		/* Start of node, full name */
#define OF_DT_END_NODE		0x2		/* End node */
#define OF_DT_PROP		0x3		/* Property: name off, size,
						 * content */
#define OF_DT_NOP		0x4		/* nop */
#define OF_DT_END		0x9

#define OF_DT_VERSION		0x10

/*
 * This is what gets passed to the kernel by prom_init or kexec
 *
 * The dt struct contains the device tree structure, full pathes and
 * property contents. The dt strings contain a separate block with just
 * the strings for the property names, and is fully page aligned and
 * self contained in a page, so that it can be kept around by the kernel,
 * each property name appears only once in this page (cheap compression)
 *
 * the mem_rsvmap contains a map of reserved ranges of physical memory,
 * passing it here instead of in the device-tree itself greatly simplifies
 * the job of everybody. It's just a list of u64 pairs (base/size) that
 * ends when size is 0
 */
struct boot_param_header
{
	u32	magic;			/* magic word OF_DT_HEADER */
	u32	totalsize;		/* total size of DT block */
	u32	off_dt_struct;		/* offset to structure */
	u32	off_dt_strings;		/* offset to strings */
	u32	off_mem_rsvmap;		/* offset to memory reserve map */
	u32	version;		/* format version */
	u32	last_comp_version;	/* last compatible version */
	/* version 2 fields below */
	u32	boot_cpuid_phys;	/* Physical CPU id we're booting on */
	/* version 3 fields below */
	u32	dt_strings_size;	/* size of the DT strings block */
	/* version 17 fields below */
	u32	dt_struct_size;		/* size of the DT structure block */
};


typedef u32 phandle;
typedef u32 ihandle;

struct property {
	char	*name;
	int	length;
	void	*value;
	struct property *next;
};

struct device_node {
	const char *name;
	const char *type;
	phandle	node;
	phandle linux_phandle;
	char	*full_name;

	struct	property *properties;
	struct  property *deadprops; /* removed 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  proc_dir_entry *pde;	/* this node's proc directory */
	struct  kref kref;
	unsigned long _flags;
	void	*data;
};

extern struct device_node *of_chosen;

static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
{
	return test_bit(flag, &n->_flags);
}

static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
{
	set_bit(flag, &n->_flags);
}


#define HAVE_ARCH_DEVTREE_FIXUPS

static inline void set_node_proc_entry(struct device_node *dn, struct proc_dir_entry *de)
{
	dn->pde = de;
}


extern struct device_node *of_find_all_nodes(struct device_node *prev);
extern struct device_node *of_node_get(struct device_node *node);
extern void of_node_put(struct device_node *node);

/* For scanning the flat device-tree at boot time */
extern int __init of_scan_flat_dt(int (*it)(unsigned long node,
					    const char *uname, int depth,
					    void *data),
				  void *data);
extern void* __init of_get_flat_dt_prop(unsigned long node, const char *name,
					unsigned long *size);
extern int __init of_flat_dt_is_compatible(unsigned long node, const char *name);
extern unsigned long __init of_get_flat_dt_root(void);

/* For updating the device tree at runtime */
extern void of_attach_node(struct device_node *);
extern void of_detach_node(struct device_node *);

/* Other Prototypes */
extern void finish_device_tree(void);
extern void unflatten_device_tree(void);
extern void early_init_devtree(void *);
extern int machine_is_compatible(const char *compat);
extern void print_properties(struct device_node *node);
extern int prom_n_intr_cells(struct device_node* np);
extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
extern int prom_add_property(struct device_node* np, struct property* prop);
extern int prom_remove_property(struct device_node *np, struct property *prop);
extern int prom_update_property(struct device_node *np,
				struct property *newprop,
				struct property *oldprop);

#ifdef CONFIG_PPC32
/*
 * PCI <-> OF matching functions
 * (XXX should these be here?)
 */
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);
#endif

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);


/*
 * OF address retreival & translation
 */


/* Helper to read a big number; size is in cells (not bytes) */
static inline u64 of_read_number(const u32 *cell, int size)
{
	u64 r = 0;
	while (size--)
		r = (r << 32) | *(cell++);
	return r;
}

/* Like of_read_number, but we want an unsigned long result */
#ifdef CONFIG_PPC32
static inline unsigned long of_read_ulong(const u32 *cell, int size)
{
	return cell[size-1];
}
#else
#define of_read_ulong(cell, size)	of_read_number(cell, size)
#endif

/* Translate an OF address block into a CPU physical address
 */
extern u64 of_translate_address(struct device_node *np, const u32 *addr);

/* Translate a DMA address from device space to CPU space */
extern u64 of_translate_dma_address(struct device_node *dev,
				    const u32 *in_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 const u32 *of_get_address(struct device_node *dev, int index,
			   u64 *size, unsigned int *flags);
extern const 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);

/* Parse the ibm,dma-window property of an OF node into the busno, phys and
 * size parameters.
 */
void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
		unsigned long *busno, unsigned long *phys, unsigned long *size);

extern void kdump_move_device_tree(void);

/* CPU OF node matching */
struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);

/* Get the MAC address */
extern const void *of_get_mac_address(struct device_node *np);

/*
 * OF interrupt mapping
 */

/* This structure is returned when an interrupt is mapped. The controller
 * field needs to be put() after use
 */

#define OF_MAX_IRQ_SPEC		 4 /* We handle specifiers of at most 4 cells */

struct of_irq {
	struct device_node *controller;	/* Interrupt controller node */
	u32 size;			/* Specifier size */
	u32 specifier[OF_MAX_IRQ_SPEC];	/* Specifier copy */
};

/**
 * of_irq_map_init - Initialize the irq remapper
 * @flags:	flags defining workarounds to enable
 *
 * Some machines have bugs in the device-tree which require certain workarounds
 * to be applied. Call this before any interrupt mapping attempts to enable
 * those workarounds.
 */
#define OF_IMAP_OLDWORLD_MAC	0x00000001
#define OF_IMAP_NO_PHANDLE	0x00000002

extern void of_irq_map_init(unsigned int flags);

/**
 * of_irq_map_raw - Low level interrupt tree parsing
 * @parent:	the device interrupt parent
 * @intspec:	interrupt specifier ("interrupts" property of the device)
 * @ointsize:   size of the passed in interrupt specifier
 * @addr:	address specifier (start of "reg" property of the device)
 * @out_irq:	structure of_irq filled by this function
 *
 * Returns 0 on success and a negative number on error
 *
 * This function is a low-level interrupt tree walking function. It
 * can be used to do a partial walk with synthetized reg and interrupts
 * properties, for example when resolving PCI interrupts when no device
 * node exist for the parent.
 *
 */

extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
			  u32 ointsize, const u32 *addr,
			  struct of_irq *out_irq);


/**
 * of_irq_map_one - Resolve an interrupt for a device
 * @device:	the device whose interrupt is to be resolved
 * @index:     	index of the interrupt to resolve
 * @out_irq:	structure of_irq filled by this function
 *
 * This function resolves an interrupt, walking the tree, for a given
 * device-tree node. It's the high level pendant to of_irq_map_raw().
 * It also implements the workarounds for OldWolrd Macs.
 */
extern int of_irq_map_one(struct device_node *device, int index,
			  struct of_irq *out_irq);

/**
 * of_irq_map_pci - Resolve the interrupt for a PCI device
 * @pdev:	the device whose interrupt is to be resolved
 * @out_irq:	structure of_irq filled by this function
 *
 * This function resolves the PCI interrupt for a given PCI device. If a
 * device-node exists for a given pci_dev, it will use normal OF tree
 * walking. If not, it will implement standard swizzling and walk up the
 * PCI tree until an device-node is found, at which point it will finish
 * resolving using the OF tree walking.
 */
struct pci_dev;
extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);

extern int of_irq_to_resource(struct device_node *dev, int index,
			struct resource *r);

/**
 * of_iomap - Maps the memory mapped IO for a given device_node
 * @device:	the device whose io range will be mapped
 * @index:	index of the io range
 *
 * Returns a pointer to the mapped memory
 */
extern void __iomem *of_iomap(struct device_node *device, int index);

/*
 * NB:  This is here while we transition from using asm/prom.h
 * to linux/of.h
 */
#include <linux/of.h>

#endif /* __KERNEL__ */
#endif /* _POWERPC_PROM_H */
Commit	Line	Data
9b6b563c PM	1	#ifndef _POWERPC_PROM_H
	2	#define _POWERPC_PROM_H
	3	#ifdef __KERNEL__
	4
	5	/*
	6	* Definitions for talking to the Open Firmware PROM on
	7	* Power Macintosh computers.
	8	*
	9	* Copyright (C) 1996-2005 Paul Mackerras.
	10	*
	11	* Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
	12	*
	13	* This program is free software; you can redistribute it and/or
	14	* modify it under the terms of the GNU General Public License
	15	* as published by the Free Software Foundation; either version
	16	* 2 of the License, or (at your option) any later version.
	17	*/
	18	#include <linux/types.h>
	19	#include <linux/proc_fs.h>
a9b14973	20	#include <linux/platform_device.h>
99ddef9b	21	#include <asm/irq.h>
9b6b563c PM	22	#include <asm/atomic.h>
9b6b563c PM	23
97e873e5 SR	24	#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
	25	#define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
	26
804ace88	27	#define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2))
581b605a	28	#define of_prop_cmp(s1, s2) strcmp((s1), (s2))
1ef4d424	29	#define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
0081cbc3	30
9b6b563c PM	31	/* Definitions used by the flattened device tree */
	32	#define OF_DT_HEADER 0xd00dfeed /* marker */
	33	#define OF_DT_BEGIN_NODE 0x1 /* Start of node, full name */
	34	#define OF_DT_END_NODE 0x2 /* End node */
	35	#define OF_DT_PROP 0x3 /* Property: name off, size,
	36	* content */
	37	#define OF_DT_NOP 0x4 /* nop */
	38	#define OF_DT_END 0x9
	39
	40	#define OF_DT_VERSION 0x10
	41
	42	/*
	43	* This is what gets passed to the kernel by prom_init or kexec
	44	*
	45	* The dt struct contains the device tree structure, full pathes and
	46	* property contents. The dt strings contain a separate block with just
	47	* the strings for the property names, and is fully page aligned and
	48	* self contained in a page, so that it can be kept around by the kernel,
	49	* each property name appears only once in this page (cheap compression)
	50	*
	51	* the mem_rsvmap contains a map of reserved ranges of physical memory,
	52	* passing it here instead of in the device-tree itself greatly simplifies
	53	* the job of everybody. It's just a list of u64 pairs (base/size) that
	54	* ends when size is 0
	55	*/
	56	struct boot_param_header
	57	{
	58	u32 magic; /* magic word OF_DT_HEADER */
	59	u32 totalsize; /* total size of DT block */
	60	u32 off_dt_struct; /* offset to structure */
	61	u32 off_dt_strings; /* offset to strings */
	62	u32 off_mem_rsvmap; /* offset to memory reserve map */
	63	u32 version; /* format version */
	64	u32 last_comp_version; /* last compatible version */
	65	/* version 2 fields below */
	66	u32 boot_cpuid_phys; /* Physical CPU id we're booting on */
	67	/* version 3 fields below */
	68	u32 dt_strings_size; /* size of the DT strings block */
0e0293c8 DG	69	/* version 17 fields below */
0e0293c8 DG	70	u32 dt_struct_size; /* size of the DT structure block */
9b6b563c PM	71	};
	72
	73
	74
	75	typedef u32 phandle;
	76	typedef u32 ihandle;
	77
9b6b563c PM	78	struct property {
	79	char *name;
	80	int length;
1a38147e	81	void *value;
9b6b563c PM	82	struct property *next;
	83	};
	84
	85	struct device_node {
a7f67bdf JK	86	const char *name;
a7f67bdf JK	87	const char *type;
9b6b563c PM	88	phandle node;
9b6b563c PM	89	phandle linux_phandle;
9b6b563c PM	90	char *full_name;
	91
	92	struct property *properties;
088186de	93	struct property deadprops; / removed properties */
9b6b563c PM	94	struct device_node *parent;
	95	struct device_node *child;
	96	struct device_node *sibling;
	97	struct device_node next; / next device of same type */
	98	struct device_node allnext; / next in list of all nodes */
	99	struct proc_dir_entry pde; / this node's proc directory */
	100	struct kref kref;
	101	unsigned long _flags;
	102	void *data;
	103	};
	104
	105	extern struct device_node *of_chosen;
	106
d3b814bb ME	107	static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
	108	{
	109	return test_bit(flag, &n->_flags);
	110	}
	111
	112	static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
	113	{
	114	set_bit(flag, &n->_flags);
	115	}
9b6b563c	116
9b6b563c PM	117
	118	#define HAVE_ARCH_DEVTREE_FIXUPS
	119
	120	static inline void set_node_proc_entry(struct device_node dn, struct proc_dir_entry de)
	121	{
	122	dn->pde = de;
	123	}
	124
	125
9b6b563c	126	extern struct device_node of_find_all_nodes(struct device_node prev);
9b6b563c PM	127	extern struct device_node of_node_get(struct device_node node);
	128	extern void of_node_put(struct device_node *node);
	129
3c726f8d	130	/* For scanning the flat device-tree at boot time */
e8222502 BH	131	extern int __init of_scan_flat_dt(int (*it)(unsigned long node,
	132	const char *uname, int depth,
	133	void *data),
	134	void *data);
	135	extern void* __init of_get_flat_dt_prop(unsigned long node, const char *name,
	136	unsigned long *size);
	137	extern int __init of_flat_dt_is_compatible(unsigned long node, const char *name);
	138	extern unsigned long __init of_get_flat_dt_root(void);
3c726f8d	139
9b6b563c PM	140	/* For updating the device tree at runtime */
9b6b563c PM	141	extern void of_attach_node(struct device_node *);
34f329db	142	extern void of_detach_node(struct device_node *);
9b6b563c PM	143
	144	/* Other Prototypes */
	145	extern void finish_device_tree(void);
	146	extern void unflatten_device_tree(void);
	147	extern void early_init_devtree(void *);
9b6b563c	148	extern int machine_is_compatible(const char *compat);
9b6b563c	149	extern void print_properties(struct device_node *node);
9b6b563c PM	150	extern int prom_n_intr_cells(struct device_node* np);
9b6b563c PM	151	extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
183d0202	152	extern int prom_add_property(struct device_node* np, struct property* prop);
088186de DB	153	extern int prom_remove_property(struct device_node np, struct property prop);
	154	extern int prom_update_property(struct device_node *np,
	155	struct property *newprop,
	156	struct property *oldprop);
9b6b563c	157
40ef8cbc	158	#ifdef CONFIG_PPC32
9b6b563c PM	159	/*
	160	* PCI <-> OF matching functions
	161	* (XXX should these be here?)
	162	*/
	163	struct pci_bus;
	164	struct pci_dev;
	165	extern int pci_device_from_OF_node(struct device_node *node,
	166	u8* bus, u8* devfn);
	167	extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int);
	168	extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
	169	extern void pci_create_OF_bus_map(void);
40ef8cbc PM	170	#endif
40ef8cbc PM	171
9b6b563c PM	172	extern struct resource request_OF_resource(struct device_node node,
	173	int index, const char* name_postfix);
	174	extern int release_OF_resource(struct device_node* node, int index);
	175
d2dd482b	176
d1405b86	177	/*
d2dd482b BH	178	* OF address retreival & translation
	179	*/
	180
	181
a4dc7ff0	182	/* Helper to read a big number; size is in cells (not bytes) */
b5a1a9ab	183	static inline u64 of_read_number(const u32 *cell, int size)
cc9fd71c BH	184	{
	185	u64 r = 0;
	186	while (size--)
	187	r = (r << 32) \| *(cell++);
	188	return r;
	189	}
	190
a4dc7ff0 PM	191	/* Like of_read_number, but we want an unsigned long result */
	192	#ifdef CONFIG_PPC32
	193	static inline unsigned long of_read_ulong(const u32 *cell, int size)
	194	{
	195	return cell[size-1];
	196	}
	197	#else
	198	#define of_read_ulong(cell, size) of_read_number(cell, size)
	199	#endif
	200
d2dd482b	201	/* Translate an OF address block into a CPU physical address
d1405b86	202	*/
a7f67bdf	203	extern u64 of_translate_address(struct device_node np, const u32 addr);
d1405b86	204
837c54db BH	205	/* Translate a DMA address from device space to CPU space */
	206	extern u64 of_translate_dma_address(struct device_node *dev,
	207	const u32 *in_addr);
	208
d2dd482b BH	209	/* Extract an address from a device, returns the region size and
	210	* the address space flags too. The PCI version uses a BAR number
	211	* instead of an absolute index
	212	*/
a7f67bdf	213	extern const u32 of_get_address(struct device_node dev, int index,
d2dd482b	214	u64 size, unsigned int flags);
a7f67bdf	215	extern const u32 of_get_pci_address(struct device_node dev, int bar_no,
d2dd482b BH	216	u64 size, unsigned int flags);
	217
	218	/* Get an address as a resource. Note that if your address is
	219	* a PIO address, the conversion will fail if the physical address
	220	* can't be internally converted to an IO token with
	221	* pci_address_to_pio(), that is because it's either called to early
	222	* or it can't be matched to any host bridge IO space
	223	*/
	224	extern int of_address_to_resource(struct device_node *dev, int index,
	225	struct resource *r);
	226	extern int of_pci_address_to_resource(struct device_node *dev, int bar,
	227	struct resource *r);
d1405b86	228
d4ad66fa JK	229	/* Parse the ibm,dma-window property of an OF node into the busno, phys and
	230	* size parameters.
	231	*/
a7f67bdf	232	void of_parse_dma_window(struct device_node dn, const void dma_window_prop,
d4ad66fa JK	233	unsigned long busno, unsigned long phys, unsigned long *size);
d4ad66fa JK	234
b68239ee ME	235	extern void kdump_move_device_tree(void);
b68239ee ME	236
acf7d768 BH	237	/* CPU OF node matching */
	238	struct device_node of_get_cpu_node(int cpu, unsigned int thread);
	239
29cfe6f4 TT	240	/* Get the MAC address */
29cfe6f4 TT	241	extern const void of_get_mac_address(struct device_node np);
cc9fd71c BH	242
	243	/*
	244	* OF interrupt mapping
	245	*/
	246
	247	/* This structure is returned when an interrupt is mapped. The controller
	248	* field needs to be put() after use
	249	*/
	250
	251	#define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
	252
	253	struct of_irq {
	254	struct device_node controller; / Interrupt controller node */
	255	u32 size; /* Specifier size */
	256	u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
	257	};
	258
40681b95	259	/**
cc9fd71c BH	260	* of_irq_map_init - Initialize the irq remapper
	261	* @flags: flags defining workarounds to enable
	262	*
	263	* Some machines have bugs in the device-tree which require certain workarounds
	264	* to be applied. Call this before any interrupt mapping attempts to enable
	265	* those workarounds.
	266	*/
	267	#define OF_IMAP_OLDWORLD_MAC 0x00000001
	268	#define OF_IMAP_NO_PHANDLE 0x00000002
	269
	270	extern void of_irq_map_init(unsigned int flags);
	271
40681b95	272	/**
cc9fd71c BH	273	* of_irq_map_raw - Low level interrupt tree parsing
	274	* @parent: the device interrupt parent
	275	* @intspec: interrupt specifier ("interrupts" property of the device)
006b64de	276	* @ointsize: size of the passed in interrupt specifier
cc9fd71c BH	277	* @addr: address specifier (start of "reg" property of the device)
	278	* @out_irq: structure of_irq filled by this function
	279	*
	280	* Returns 0 on success and a negative number on error
	281	*
	282	* This function is a low-level interrupt tree walking function. It
	283	* can be used to do a partial walk with synthetized reg and interrupts
	284	* properties, for example when resolving PCI interrupts when no device
	285	* node exist for the parent.
	286	*
	287	*/
	288
a7f67bdf	289	extern int of_irq_map_raw(struct device_node parent, const u32 intspec,
aa43f779	290	u32 ointsize, const u32 *addr,
cc9fd71c BH	291	struct of_irq *out_irq);
	292
	293
40681b95	294	/**
cc9fd71c BH	295	* of_irq_map_one - Resolve an interrupt for a device
	296	* @device: the device whose interrupt is to be resolved
	297	* @index: index of the interrupt to resolve
	298	* @out_irq: structure of_irq filled by this function
	299	*
	300	* This function resolves an interrupt, walking the tree, for a given
	301	* device-tree node. It's the high level pendant to of_irq_map_raw().
	302	* It also implements the workarounds for OldWolrd Macs.
	303	*/
	304	extern int of_irq_map_one(struct device_node *device, int index,
	305	struct of_irq *out_irq);
	306
40681b95	307	/**
cc9fd71c BH	308	* of_irq_map_pci - Resolve the interrupt for a PCI device
	309	* @pdev: the device whose interrupt is to be resolved
	310	* @out_irq: structure of_irq filled by this function
	311	*
	312	* This function resolves the PCI interrupt for a given PCI device. If a
	313	* device-node exists for a given pci_dev, it will use normal OF tree
	314	* walking. If not, it will implement standard swizzling and walk up the
	315	* PCI tree until an device-node is found, at which point it will finish
	316	* resolving using the OF tree walking.
	317	*/
	318	struct pci_dev;
	319	extern int of_irq_map_pci(struct pci_dev pdev, struct of_irq out_irq);
	320
c0b3ae14 MD	321	extern int of_irq_to_resource(struct device_node *dev, int index,
c0b3ae14 MD	322	struct resource *r);
a9b14973	323
c3e8011a CK	324	/**
	325	* of_iomap - Maps the memory mapped IO for a given device_node
	326	* @device: the device whose io range will be mapped
	327	* @index: index of the io range
	328	*
	329	* Returns a pointer to the mapped memory
	330	*/
	331	extern void __iomem of_iomap(struct device_node device, int index);
cc9fd71c	332
76c1ce78 SR	333	/*
	334	* NB: This is here while we transition from using asm/prom.h
	335	* to linux/of.h
	336	*/
	337	#include <linux/of.h>
	338
9b6b563c PM	339	#endif /* __KERNEL__ */
9b6b563c PM	340	#endif /* _POWERPC_PROM_H */