[deliverable/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>

/* 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;
	unsigned char *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;

/* flag descriptions */
#define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */

#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_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;
}


/* 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);
#define for_each_node_by_name(dn, name) \
	for (dn = of_find_node_by_name(NULL, name); dn; \
	     dn = of_find_node_by_name(dn, name))
extern struct device_node *of_find_node_by_type(struct device_node *from,
	const char *type);
#define for_each_node_by_type(dn, type) \
	for (dn = of_find_node_by_type(NULL, type); dn; \
	     dn = of_find_node_by_type(dn, 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_node_by_phandle(phandle handle);
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 property *of_find_property(const struct device_node *np,
					 const char *name,
					 int *lenp);
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(const 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 of_device_is_compatible(const struct device_node *device,
				const char *);
#define device_is_compatible(d, c)	of_device_is_compatible((d), (c))
extern int machine_is_compatible(const char *compat);
extern const void *of_get_property(const struct device_node *node,
				const char *name,
				int *lenp);
#define get_property(a, b, c)	of_get_property((a), (b), (c))
extern void print_properties(struct device_node *node);
extern int of_n_addr_cells(struct device_node* np);
extern int of_n_size_cells(struct device_node* np);
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
 */
#define OF_BAD_ADDR	((u64)-1)
extern u64 of_translate_address(struct device_node *np, const 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 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);

static inline int of_irq_to_resource(struct device_node *dev, int index, struct resource *r)
{
	int irq = irq_of_parse_and_map(dev, index);

	/* Only dereference the resource if both the
	 * resource and the irq are valid. */
	if (r && irq != NO_IRQ) {
		r->start = r->end = irq;
		r->flags = IORESOURCE_IRQ;
	}

	return irq;
}


#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>
	23
	24	/* Definitions used by the flattened device tree */
	25	#define OF_DT_HEADER 0xd00dfeed /* marker */
	26	#define OF_DT_BEGIN_NODE 0x1 /* Start of node, full name */
	27	#define OF_DT_END_NODE 0x2 /* End node */
	28	#define OF_DT_PROP 0x3 /* Property: name off, size,
	29	* content */
	30	#define OF_DT_NOP 0x4 /* nop */
	31	#define OF_DT_END 0x9
	32
	33	#define OF_DT_VERSION 0x10
	34
	35	/*
	36	* This is what gets passed to the kernel by prom_init or kexec
	37	*
	38	* The dt struct contains the device tree structure, full pathes and
	39	* property contents. The dt strings contain a separate block with just
	40	* the strings for the property names, and is fully page aligned and
	41	* self contained in a page, so that it can be kept around by the kernel,
	42	* each property name appears only once in this page (cheap compression)
	43	*
	44	* the mem_rsvmap contains a map of reserved ranges of physical memory,
	45	* passing it here instead of in the device-tree itself greatly simplifies
	46	* the job of everybody. It's just a list of u64 pairs (base/size) that
	47	* ends when size is 0
	48	*/
	49	struct boot_param_header
	50	{
	51	u32 magic; /* magic word OF_DT_HEADER */
	52	u32 totalsize; /* total size of DT block */
	53	u32 off_dt_struct; /* offset to structure */
	54	u32 off_dt_strings; /* offset to strings */
	55	u32 off_mem_rsvmap; /* offset to memory reserve map */
	56	u32 version; /* format version */
	57	u32 last_comp_version; /* last compatible version */
	58	/* version 2 fields below */
	59	u32 boot_cpuid_phys; /* Physical CPU id we're booting on */
	60	/* version 3 fields below */
	61	u32 dt_strings_size; /* size of the DT strings block */
0e0293c8 DG	62	/* version 17 fields below */
0e0293c8 DG	63	u32 dt_struct_size; /* size of the DT structure block */
9b6b563c PM	64	};
	65
	66
	67
	68	typedef u32 phandle;
	69	typedef u32 ihandle;
	70
9b6b563c PM	71	struct property {
	72	char *name;
	73	int length;
	74	unsigned char *value;
	75	struct property *next;
	76	};
	77
	78	struct device_node {
a7f67bdf JK	79	const char *name;
a7f67bdf JK	80	const char *type;
9b6b563c PM	81	phandle node;
9b6b563c PM	82	phandle linux_phandle;
9b6b563c PM	83	char *full_name;
	84
	85	struct property *properties;
088186de	86	struct property deadprops; / removed properties */
9b6b563c PM	87	struct device_node *parent;
	88	struct device_node *child;
	89	struct device_node *sibling;
	90	struct device_node next; / next device of same type */
	91	struct device_node allnext; / next in list of all nodes */
	92	struct proc_dir_entry pde; / this node's proc directory */
	93	struct kref kref;
	94	unsigned long _flags;
	95	void *data;
	96	};
	97
	98	extern struct device_node *of_chosen;
	99
	100	/* flag descriptions */
	101	#define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
	102
	103	#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
	104	#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
	105
	106	#define HAVE_ARCH_DEVTREE_FIXUPS
	107
	108	static inline void set_node_proc_entry(struct device_node dn, struct proc_dir_entry de)
	109	{
	110	dn->pde = de;
	111	}
	112
	113
	114	/* OBSOLETE: Old style node lookup */
bf20a000 PM	115	extern struct device_node find_devices(const char name);
	116	extern struct device_node find_type_devices(const char type);
	117	extern struct device_node find_path_device(const char path);
	118	extern struct device_node find_compatible_devices(const char type,
9b6b563c	119	const char *compat);
bf20a000	120	extern struct device_node *find_all_nodes(void);
9b6b563c PM	121
	122	/* New style node lookup */
	123	extern struct device_node of_find_node_by_name(struct device_node from,
	124	const char *name);
e3385222 CH	125	#define for_each_node_by_name(dn, name) \
	126	for (dn = of_find_node_by_name(NULL, name); dn; \
	127	dn = of_find_node_by_name(dn, name))
9b6b563c PM	128	extern struct device_node of_find_node_by_type(struct device_node from,
9b6b563c PM	129	const char *type);
e3385222 CH	130	#define for_each_node_by_type(dn, type) \
	131	for (dn = of_find_node_by_type(NULL, type); dn; \
	132	dn = of_find_node_by_type(dn, type))
9b6b563c PM	133	extern struct device_node of_find_compatible_node(struct device_node from,
	134	const char type, const char compat);
	135	extern struct device_node of_find_node_by_path(const char path);
	136	extern struct device_node *of_find_node_by_phandle(phandle handle);
	137	extern struct device_node of_find_all_nodes(struct device_node prev);
	138	extern struct device_node of_get_parent(const struct device_node node);
	139	extern struct device_node of_get_next_child(const struct device_node node,
	140	struct device_node *prev);
e2100efb	141	extern struct property of_find_property(const struct device_node np,
ecaa8b0f DB	142	const char *name,
ecaa8b0f DB	143	int *lenp);
9b6b563c PM	144	extern struct device_node of_node_get(struct device_node node);
	145	extern void of_node_put(struct device_node *node);
	146
3c726f8d	147	/* For scanning the flat device-tree at boot time */
e8222502 BH	148	extern int __init of_scan_flat_dt(int (*it)(unsigned long node,
	149	const char *uname, int depth,
	150	void *data),
	151	void *data);
	152	extern void* __init of_get_flat_dt_prop(unsigned long node, const char *name,
	153	unsigned long *size);
	154	extern int __init of_flat_dt_is_compatible(unsigned long node, const char *name);
	155	extern unsigned long __init of_get_flat_dt_root(void);
3c726f8d	156
9b6b563c PM	157	/* For updating the device tree at runtime */
	158	extern void of_attach_node(struct device_node *);
	159	extern void of_detach_node(const struct device_node *);
	160
	161	/* Other Prototypes */
	162	extern void finish_device_tree(void);
	163	extern void unflatten_device_tree(void);
	164	extern void early_init_devtree(void *);
7a92f74f	165	extern int of_device_is_compatible(const struct device_node *device,
e2100efb	166	const char *);
7a92f74f	167	#define device_is_compatible(d, c) of_device_is_compatible((d), (c))
9b6b563c	168	extern int machine_is_compatible(const char *compat);
0e56efc7	169	extern const void of_get_property(const struct device_node node,
e2100efb BH	170	const char *name,
e2100efb BH	171	int *lenp);
0e56efc7	172	#define get_property(a, b, c) of_get_property((a), (b), (c))
9b6b563c	173	extern void print_properties(struct device_node *node);
a8bda5dd	174	extern int of_n_addr_cells(struct device_node* np);
9213feea	175	extern int of_n_size_cells(struct device_node* np);
9b6b563c PM	176	extern int prom_n_intr_cells(struct device_node* np);
9b6b563c PM	177	extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
183d0202	178	extern int prom_add_property(struct device_node* np, struct property* prop);
088186de DB	179	extern int prom_remove_property(struct device_node np, struct property prop);
	180	extern int prom_update_property(struct device_node *np,
	181	struct property *newprop,
	182	struct property *oldprop);
9b6b563c	183
40ef8cbc	184	#ifdef CONFIG_PPC32
9b6b563c PM	185	/*
	186	* PCI <-> OF matching functions
	187	* (XXX should these be here?)
	188	*/
	189	struct pci_bus;
	190	struct pci_dev;
	191	extern int pci_device_from_OF_node(struct device_node *node,
	192	u8* bus, u8* devfn);
	193	extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int);
	194	extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
	195	extern void pci_create_OF_bus_map(void);
40ef8cbc PM	196	#endif
40ef8cbc PM	197
9b6b563c PM	198	extern struct resource request_OF_resource(struct device_node node,
	199	int index, const char* name_postfix);
	200	extern int release_OF_resource(struct device_node* node, int index);
	201
d2dd482b	202
d1405b86	203	/*
d2dd482b BH	204	* OF address retreival & translation
	205	*/
	206
	207
a4dc7ff0	208	/* Helper to read a big number; size is in cells (not bytes) */
b5a1a9ab	209	static inline u64 of_read_number(const u32 *cell, int size)
cc9fd71c BH	210	{
	211	u64 r = 0;
	212	while (size--)
	213	r = (r << 32) \| *(cell++);
	214	return r;
	215	}
	216
a4dc7ff0 PM	217	/* Like of_read_number, but we want an unsigned long result */
	218	#ifdef CONFIG_PPC32
	219	static inline unsigned long of_read_ulong(const u32 *cell, int size)
	220	{
	221	return cell[size-1];
	222	}
	223	#else
	224	#define of_read_ulong(cell, size) of_read_number(cell, size)
	225	#endif
	226
d2dd482b	227	/* Translate an OF address block into a CPU physical address
d1405b86 BH	228	*/
d1405b86 BH	229	#define OF_BAD_ADDR ((u64)-1)
a7f67bdf	230	extern u64 of_translate_address(struct device_node np, const u32 addr);
d1405b86	231
d2dd482b BH	232	/* Extract an address from a device, returns the region size and
	233	* the address space flags too. The PCI version uses a BAR number
	234	* instead of an absolute index
	235	*/
a7f67bdf	236	extern const u32 of_get_address(struct device_node dev, int index,
d2dd482b	237	u64 size, unsigned int flags);
a7f67bdf	238	extern const u32 of_get_pci_address(struct device_node dev, int bar_no,
d2dd482b BH	239	u64 size, unsigned int flags);
	240
	241	/* Get an address as a resource. Note that if your address is
	242	* a PIO address, the conversion will fail if the physical address
	243	* can't be internally converted to an IO token with
	244	* pci_address_to_pio(), that is because it's either called to early
	245	* or it can't be matched to any host bridge IO space
	246	*/
	247	extern int of_address_to_resource(struct device_node *dev, int index,
	248	struct resource *r);
	249	extern int of_pci_address_to_resource(struct device_node *dev, int bar,
	250	struct resource *r);
d1405b86	251
d4ad66fa JK	252	/* Parse the ibm,dma-window property of an OF node into the busno, phys and
	253	* size parameters.
	254	*/
a7f67bdf	255	void of_parse_dma_window(struct device_node dn, const void dma_window_prop,
d4ad66fa JK	256	unsigned long busno, unsigned long phys, unsigned long *size);
d4ad66fa JK	257
b68239ee ME	258	extern void kdump_move_device_tree(void);
b68239ee ME	259
acf7d768 BH	260	/* CPU OF node matching */
	261	struct device_node of_get_cpu_node(int cpu, unsigned int thread);
	262
29cfe6f4 TT	263	/* Get the MAC address */
29cfe6f4 TT	264	extern const void of_get_mac_address(struct device_node np);
cc9fd71c BH	265
	266	/*
	267	* OF interrupt mapping
	268	*/
	269
	270	/* This structure is returned when an interrupt is mapped. The controller
	271	* field needs to be put() after use
	272	*/
	273
	274	#define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
	275
	276	struct of_irq {
	277	struct device_node controller; / Interrupt controller node */
	278	u32 size; /* Specifier size */
	279	u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
	280	};
	281
40681b95	282	/**
cc9fd71c BH	283	* of_irq_map_init - Initialize the irq remapper
	284	* @flags: flags defining workarounds to enable
	285	*
	286	* Some machines have bugs in the device-tree which require certain workarounds
	287	* to be applied. Call this before any interrupt mapping attempts to enable
	288	* those workarounds.
	289	*/
	290	#define OF_IMAP_OLDWORLD_MAC 0x00000001
	291	#define OF_IMAP_NO_PHANDLE 0x00000002
	292
	293	extern void of_irq_map_init(unsigned int flags);
	294
40681b95	295	/**
cc9fd71c BH	296	* of_irq_map_raw - Low level interrupt tree parsing
	297	* @parent: the device interrupt parent
	298	* @intspec: interrupt specifier ("interrupts" property of the device)
006b64de	299	* @ointsize: size of the passed in interrupt specifier
cc9fd71c BH	300	* @addr: address specifier (start of "reg" property of the device)
	301	* @out_irq: structure of_irq filled by this function
	302	*
	303	* Returns 0 on success and a negative number on error
	304	*
	305	* This function is a low-level interrupt tree walking function. It
	306	* can be used to do a partial walk with synthetized reg and interrupts
	307	* properties, for example when resolving PCI interrupts when no device
	308	* node exist for the parent.
	309	*
	310	*/
	311
a7f67bdf	312	extern int of_irq_map_raw(struct device_node parent, const u32 intspec,
aa43f779	313	u32 ointsize, const u32 *addr,
cc9fd71c BH	314	struct of_irq *out_irq);
	315
	316
40681b95	317	/**
cc9fd71c BH	318	* of_irq_map_one - Resolve an interrupt for a device
	319	* @device: the device whose interrupt is to be resolved
	320	* @index: index of the interrupt to resolve
	321	* @out_irq: structure of_irq filled by this function
	322	*
	323	* This function resolves an interrupt, walking the tree, for a given
	324	* device-tree node. It's the high level pendant to of_irq_map_raw().
	325	* It also implements the workarounds for OldWolrd Macs.
	326	*/
	327	extern int of_irq_map_one(struct device_node *device, int index,
	328	struct of_irq *out_irq);
	329
40681b95	330	/**
cc9fd71c BH	331	* of_irq_map_pci - Resolve the interrupt for a PCI device
	332	* @pdev: the device whose interrupt is to be resolved
	333	* @out_irq: structure of_irq filled by this function
	334	*
	335	* This function resolves the PCI interrupt for a given PCI device. If a
	336	* device-node exists for a given pci_dev, it will use normal OF tree
	337	* walking. If not, it will implement standard swizzling and walk up the
	338	* PCI tree until an device-node is found, at which point it will finish
	339	* resolving using the OF tree walking.
	340	*/
	341	struct pci_dev;
	342	extern int of_irq_map_pci(struct pci_dev pdev, struct of_irq out_irq);
	343
66a91e9c	344	static inline int of_irq_to_resource(struct device_node dev, int index, struct resource r)
a9b14973	345	{
66a91e9c AF	346	int irq = irq_of_parse_and_map(dev, index);
	347
	348	/* Only dereference the resource if both the
	349	* resource and the irq are valid. */
	350	if (r && irq != NO_IRQ) {
	351	r->start = r->end = irq;
	352	r->flags = IORESOURCE_IRQ;
	353	}
	354
	355	return irq;
a9b14973 AF	356	}
a9b14973 AF	357
cc9fd71c	358
9b6b563c PM	359	#endif /* __KERNEL__ */
9b6b563c PM	360	#endif /* _POWERPC_PROM_H */