[mirror_ubuntu-bionic-kernel.git] / include / linux / ioport.h

/*
 * ioport.h	Definitions of routines for detecting, reserving and
 *		allocating system resources.
 *
 * Authors:	Linus Torvalds
 */

#ifndef _LINUX_IOPORT_H
#define _LINUX_IOPORT_H

#ifndef __ASSEMBLY__
#include <linux/compiler.h>
#include <linux/types.h>
/*
 * Resources are tree-like, allowing
 * nesting etc..
 */
struct resource {
	resource_size_t start;
	resource_size_t end;
	const char *name;
	unsigned long flags;
	struct resource *parent, *sibling, *child;
};

/*
 * IO resources have these defined flags.
 */
#define IORESOURCE_BITS		0x000000ff	/* Bus-specific bits */

#define IORESOURCE_TYPE_BITS	0x00001f00	/* Resource type */
#define IORESOURCE_IO		0x00000100	/* PCI/ISA I/O ports */
#define IORESOURCE_MEM		0x00000200
#define IORESOURCE_REG		0x00000300	/* Register offsets */
#define IORESOURCE_IRQ		0x00000400
#define IORESOURCE_DMA		0x00000800
#define IORESOURCE_BUS		0x00001000

#define IORESOURCE_PREFETCH	0x00002000	/* No side effects */
#define IORESOURCE_READONLY	0x00004000
#define IORESOURCE_CACHEABLE	0x00008000
#define IORESOURCE_RANGELENGTH	0x00010000
#define IORESOURCE_SHADOWABLE	0x00020000

#define IORESOURCE_SIZEALIGN	0x00040000	/* size indicates alignment */
#define IORESOURCE_STARTALIGN	0x00080000	/* start field is alignment */

#define IORESOURCE_MEM_64	0x00100000
#define IORESOURCE_WINDOW	0x00200000	/* forwarded by bridge */
#define IORESOURCE_MUXED	0x00400000	/* Resource is software muxed */

#define IORESOURCE_EXCLUSIVE	0x08000000	/* Userland may not map this resource */
#define IORESOURCE_DISABLED	0x10000000
#define IORESOURCE_UNSET	0x20000000
#define IORESOURCE_AUTO		0x40000000
#define IORESOURCE_BUSY		0x80000000	/* Driver has marked this resource busy */

/* PnP IRQ specific bits (IORESOURCE_BITS) */
#define IORESOURCE_IRQ_HIGHEDGE		(1<<0)
#define IORESOURCE_IRQ_LOWEDGE		(1<<1)
#define IORESOURCE_IRQ_HIGHLEVEL	(1<<2)
#define IORESOURCE_IRQ_LOWLEVEL		(1<<3)
#define IORESOURCE_IRQ_SHAREABLE	(1<<4)
#define IORESOURCE_IRQ_OPTIONAL 	(1<<5)

/* PnP DMA specific bits (IORESOURCE_BITS) */
#define IORESOURCE_DMA_TYPE_MASK	(3<<0)
#define IORESOURCE_DMA_8BIT		(0<<0)
#define IORESOURCE_DMA_8AND16BIT	(1<<0)
#define IORESOURCE_DMA_16BIT		(2<<0)

#define IORESOURCE_DMA_MASTER		(1<<2)
#define IORESOURCE_DMA_BYTE		(1<<3)
#define IORESOURCE_DMA_WORD		(1<<4)

#define IORESOURCE_DMA_SPEED_MASK	(3<<6)
#define IORESOURCE_DMA_COMPATIBLE	(0<<6)
#define IORESOURCE_DMA_TYPEA		(1<<6)
#define IORESOURCE_DMA_TYPEB		(2<<6)
#define IORESOURCE_DMA_TYPEF		(3<<6)

/* PnP memory I/O specific bits (IORESOURCE_BITS) */
#define IORESOURCE_MEM_WRITEABLE	(1<<0)	/* dup: IORESOURCE_READONLY */
#define IORESOURCE_MEM_CACHEABLE	(1<<1)	/* dup: IORESOURCE_CACHEABLE */
#define IORESOURCE_MEM_RANGELENGTH	(1<<2)	/* dup: IORESOURCE_RANGELENGTH */
#define IORESOURCE_MEM_TYPE_MASK	(3<<3)
#define IORESOURCE_MEM_8BIT		(0<<3)
#define IORESOURCE_MEM_16BIT		(1<<3)
#define IORESOURCE_MEM_8AND16BIT	(2<<3)
#define IORESOURCE_MEM_32BIT		(3<<3)
#define IORESOURCE_MEM_SHADOWABLE	(1<<5)	/* dup: IORESOURCE_SHADOWABLE */
#define IORESOURCE_MEM_EXPANSIONROM	(1<<6)

/* PnP I/O specific bits (IORESOURCE_BITS) */
#define IORESOURCE_IO_16BIT_ADDR	(1<<0)
#define IORESOURCE_IO_FIXED		(1<<1)

/* PCI ROM control bits (IORESOURCE_BITS) */
#define IORESOURCE_ROM_ENABLE		(1<<0)	/* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
#define IORESOURCE_ROM_SHADOW		(1<<1)	/* ROM is copy at C000:0 */
#define IORESOURCE_ROM_COPY		(1<<2)	/* ROM is alloc'd copy, resource field overlaid */
#define IORESOURCE_ROM_BIOS_COPY	(1<<3)	/* ROM is BIOS copy, resource field overlaid */

/* PCI control bits.  Shares IORESOURCE_BITS with above PCI ROM.  */
#define IORESOURCE_PCI_FIXED		(1<<4)	/* Do not move resource */


/* helpers to define resources */
#define DEFINE_RES_NAMED(_start, _size, _name, _flags)			\
	{								\
		.start = (_start),					\
		.end = (_start) + (_size) - 1,				\
		.name = (_name),					\
		.flags = (_flags),					\
	}

#define DEFINE_RES_IO_NAMED(_start, _size, _name)			\
	DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_IO)
#define DEFINE_RES_IO(_start, _size)					\
	DEFINE_RES_IO_NAMED((_start), (_size), NULL)

#define DEFINE_RES_MEM_NAMED(_start, _size, _name)			\
	DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_MEM)
#define DEFINE_RES_MEM(_start, _size)					\
	DEFINE_RES_MEM_NAMED((_start), (_size), NULL)

#define DEFINE_RES_IRQ_NAMED(_irq, _name)				\
	DEFINE_RES_NAMED((_irq), 1, (_name), IORESOURCE_IRQ)
#define DEFINE_RES_IRQ(_irq)						\
	DEFINE_RES_IRQ_NAMED((_irq), NULL)

#define DEFINE_RES_DMA_NAMED(_dma, _name)				\
	DEFINE_RES_NAMED((_dma), 1, (_name), IORESOURCE_DMA)
#define DEFINE_RES_DMA(_dma)						\
	DEFINE_RES_DMA_NAMED((_dma), NULL)

/* PC/ISA/whatever - the normal PC address spaces: IO and memory */
extern struct resource ioport_resource;
extern struct resource iomem_resource;

extern struct resource *request_resource_conflict(struct resource *root, struct resource *new);
extern int request_resource(struct resource *root, struct resource *new);
extern int release_resource(struct resource *new);
void release_child_resources(struct resource *new);
extern void reserve_region_with_split(struct resource *root,
			     resource_size_t start, resource_size_t end,
			     const char *name);
extern struct resource *insert_resource_conflict(struct resource *parent, struct resource *new);
extern int insert_resource(struct resource *parent, struct resource *new);
extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new);
extern void arch_remove_reservations(struct resource *avail);
extern int allocate_resource(struct resource *root, struct resource *new,
			     resource_size_t size, resource_size_t min,
			     resource_size_t max, resource_size_t align,
			     resource_size_t (*alignf)(void *,
						       const struct resource *,
						       resource_size_t,
						       resource_size_t),
			     void *alignf_data);
struct resource *lookup_resource(struct resource *root, resource_size_t start);
int adjust_resource(struct resource *res, resource_size_t start,
		    resource_size_t size);
resource_size_t resource_alignment(struct resource *res);
static inline resource_size_t resource_size(const struct resource *res)
{
	return res->end - res->start + 1;
}
static inline unsigned long resource_type(const struct resource *res)
{
	return res->flags & IORESOURCE_TYPE_BITS;
}

/* Convenience shorthand with allocation */
#define request_region(start,n,name)		__request_region(&ioport_resource, (start), (n), (name), 0)
#define request_muxed_region(start,n,name)	__request_region(&ioport_resource, (start), (n), (name), IORESOURCE_MUXED)
#define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl)
#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0)
#define request_mem_region_exclusive(start,n,name) \
	__request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE)
#define rename_region(region, newname) do { (region)->name = (newname); } while (0)

extern struct resource * __request_region(struct resource *,
					resource_size_t start,
					resource_size_t n,
					const char *name, int flags);

/* Compatibility cruft */
#define release_region(start,n)	__release_region(&ioport_resource, (start), (n))
#define check_mem_region(start,n)	__check_region(&iomem_resource, (start), (n))
#define release_mem_region(start,n)	__release_region(&iomem_resource, (start), (n))

extern int __check_region(struct resource *, resource_size_t, resource_size_t);
extern void __release_region(struct resource *, resource_size_t,
				resource_size_t);
#ifdef CONFIG_MEMORY_HOTREMOVE
extern int release_mem_region_adjustable(struct resource *, resource_size_t,
				resource_size_t);
#endif

static inline int __deprecated check_region(resource_size_t s,
						resource_size_t n)
{
	return __check_region(&ioport_resource, s, n);
}

/* Wrappers for managed devices */
struct device;
#define devm_request_region(dev,start,n,name) \
	__devm_request_region(dev, &ioport_resource, (start), (n), (name))
#define devm_request_mem_region(dev,start,n,name) \
	__devm_request_region(dev, &iomem_resource, (start), (n), (name))

extern struct resource * __devm_request_region(struct device *dev,
				struct resource *parent, resource_size_t start,
				resource_size_t n, const char *name);

#define devm_release_region(dev, start, n) \
	__devm_release_region(dev, &ioport_resource, (start), (n))
#define devm_release_mem_region(dev, start, n) \
	__devm_release_region(dev, &iomem_resource, (start), (n))

extern void __devm_release_region(struct device *dev, struct resource *parent,
				  resource_size_t start, resource_size_t n);
extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size);
extern int iomem_is_exclusive(u64 addr);

extern int
walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
		void *arg, int (*func)(unsigned long, unsigned long, void *));

/* True if any part of r1 overlaps r2 */
static inline bool resource_overlaps(struct resource *r1, struct resource *r2)
{
       return (r1->start <= r2->end && r1->end >= r2->start);
}


#endif /* __ASSEMBLY__ */
#endif	/* _LINUX_IOPORT_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* ioport.h Definitions of routines for detecting, reserving and
	3	* allocating system resources.
	4	*
	5	* Authors: Linus Torvalds
	6	*/
	7
	8	#ifndef _LINUX_IOPORT_H
	9	#define _LINUX_IOPORT_H
	10
c9cce83d	11	#ifndef __ASSEMBLY__
1da177e4	12	#include <linux/compiler.h>
cf7c712c	13	#include <linux/types.h>
1da177e4 LT	14	/*
	15	* Resources are tree-like, allowing
	16	* nesting etc..
	17	*/
	18	struct resource {
cf7c712c GKH	19	resource_size_t start;
cf7c712c GKH	20	resource_size_t end;
1da177e4	21	const char *name;
1da177e4 LT	22	unsigned long flags;
	23	struct resource parent, sibling, *child;
	24	};
	25
1da177e4 LT	26	/*
	27	* IO resources have these defined flags.
	28	*/
	29	#define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */
	30
cd7e9fcd	31	#define IORESOURCE_TYPE_BITS 0x00001f00 /* Resource type */
c04a9cb8	32	#define IORESOURCE_IO 0x00000100 /* PCI/ISA I/O ports */
1da177e4	33	#define IORESOURCE_MEM 0x00000200
72dcb119	34	#define IORESOURCE_REG 0x00000300 /* Register offsets */
1da177e4 LT	35	#define IORESOURCE_IRQ 0x00000400
1da177e4 LT	36	#define IORESOURCE_DMA 0x00000800
0f4050c7	37	#define IORESOURCE_BUS 0x00001000
1da177e4	38
cd7e9fcd BH	39	#define IORESOURCE_PREFETCH 0x00002000 /* No side effects */
	40	#define IORESOURCE_READONLY 0x00004000
	41	#define IORESOURCE_CACHEABLE 0x00008000
	42	#define IORESOURCE_RANGELENGTH 0x00010000
	43	#define IORESOURCE_SHADOWABLE 0x00020000
88452565	44
cd7e9fcd BH	45	#define IORESOURCE_SIZEALIGN 0x00040000 /* size indicates alignment */
cd7e9fcd BH	46	#define IORESOURCE_STARTALIGN 0x00080000 /* start field is alignment */
1da177e4	47
1f82de10	48	#define IORESOURCE_MEM_64 0x00100000
9d7cca04	49	#define IORESOURCE_WINDOW 0x00200000 /* forwarded by bridge */
8b6d043b	50	#define IORESOURCE_MUXED 0x00400000 /* Resource is software muxed */
1f82de10	51
e8de1481	52	#define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */
1da177e4 LT	53	#define IORESOURCE_DISABLED 0x10000000
	54	#define IORESOURCE_UNSET 0x20000000
	55	#define IORESOURCE_AUTO 0x40000000
	56	#define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */
	57
e9fe9e18	58	/* PnP IRQ specific bits (IORESOURCE_BITS) */
1da177e4 LT	59	#define IORESOURCE_IRQ_HIGHEDGE (1<<0)
	60	#define IORESOURCE_IRQ_LOWEDGE (1<<1)
	61	#define IORESOURCE_IRQ_HIGHLEVEL (1<<2)
	62	#define IORESOURCE_IRQ_LOWLEVEL (1<<3)
c32928c5	63	#define IORESOURCE_IRQ_SHAREABLE (1<<4)
d5ebde6e	64	#define IORESOURCE_IRQ_OPTIONAL (1<<5)
1da177e4	65
e9fe9e18	66	/* PnP DMA specific bits (IORESOURCE_BITS) */
1da177e4 LT	67	#define IORESOURCE_DMA_TYPE_MASK (3<<0)
	68	#define IORESOURCE_DMA_8BIT (0<<0)
	69	#define IORESOURCE_DMA_8AND16BIT (1<<0)
	70	#define IORESOURCE_DMA_16BIT (2<<0)
	71
	72	#define IORESOURCE_DMA_MASTER (1<<2)
	73	#define IORESOURCE_DMA_BYTE (1<<3)
	74	#define IORESOURCE_DMA_WORD (1<<4)
	75
	76	#define IORESOURCE_DMA_SPEED_MASK (3<<6)
	77	#define IORESOURCE_DMA_COMPATIBLE (0<<6)
	78	#define IORESOURCE_DMA_TYPEA (1<<6)
	79	#define IORESOURCE_DMA_TYPEB (2<<6)
	80	#define IORESOURCE_DMA_TYPEF (3<<6)
	81
e9fe9e18	82	/* PnP memory I/O specific bits (IORESOURCE_BITS) */
1da177e4 LT	83	#define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */
	84	#define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */
	85	#define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */
	86	#define IORESOURCE_MEM_TYPE_MASK (3<<3)
	87	#define IORESOURCE_MEM_8BIT (0<<3)
	88	#define IORESOURCE_MEM_16BIT (1<<3)
	89	#define IORESOURCE_MEM_8AND16BIT (2<<3)
	90	#define IORESOURCE_MEM_32BIT (3<<3)
	91	#define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */
	92	#define IORESOURCE_MEM_EXPANSIONROM (1<<6)
	93
08c9f262 BH	94	/* PnP I/O specific bits (IORESOURCE_BITS) */
	95	#define IORESOURCE_IO_16BIT_ADDR (1<<0)
	96	#define IORESOURCE_IO_FIXED (1<<1)
	97
1da177e4 LT	98	/* PCI ROM control bits (IORESOURCE_BITS) */
	99	#define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
	100	#define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */
	101	#define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */
a2302c68	102	#define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */
1da177e4	103
fb0f2b40 RB	104	/* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */
	105	#define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */
	106
a0e44d4a UKK	107
	108	/* helpers to define resources */
	109	#define DEFINE_RES_NAMED(_start, _size, _name, _flags) \
	110	{ \
	111	.start = (_start), \
	112	.end = (_start) + (_size) - 1, \
	113	.name = (_name), \
	114	.flags = (_flags), \
	115	}
	116
	117	#define DEFINE_RES_IO_NAMED(_start, _size, _name) \
	118	DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_IO)
	119	#define DEFINE_RES_IO(_start, _size) \
	120	DEFINE_RES_IO_NAMED((_start), (_size), NULL)
	121
	122	#define DEFINE_RES_MEM_NAMED(_start, _size, _name) \
	123	DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_MEM)
	124	#define DEFINE_RES_MEM(_start, _size) \
	125	DEFINE_RES_MEM_NAMED((_start), (_size), NULL)
	126
	127	#define DEFINE_RES_IRQ_NAMED(_irq, _name) \
	128	DEFINE_RES_NAMED((_irq), 1, (_name), IORESOURCE_IRQ)
	129	#define DEFINE_RES_IRQ(_irq) \
	130	DEFINE_RES_IRQ_NAMED((_irq), NULL)
	131
	132	#define DEFINE_RES_DMA_NAMED(_dma, _name) \
	133	DEFINE_RES_NAMED((_dma), 1, (_name), IORESOURCE_DMA)
	134	#define DEFINE_RES_DMA(_dma) \
	135	DEFINE_RES_DMA_NAMED((_dma), NULL)
	136
1da177e4 LT	137	/* PC/ISA/whatever - the normal PC address spaces: IO and memory */
	138	extern struct resource ioport_resource;
	139	extern struct resource iomem_resource;
	140
66f1207b	141	extern struct resource request_resource_conflict(struct resource root, struct resource *new);
1da177e4	142	extern int request_resource(struct resource root, struct resource new);
1da177e4	143	extern int release_resource(struct resource *new);
5eeec0ec	144	void release_child_resources(struct resource *new);
268364a0 YL	145	extern void reserve_region_with_split(struct resource *root,
	146	resource_size_t start, resource_size_t end,
	147	const char *name);
66f1207b	148	extern struct resource insert_resource_conflict(struct resource parent, struct resource *new);
cd6ef2ad	149	extern int insert_resource(struct resource parent, struct resource new);
bef69ea0	150	extern void insert_resource_expand_to_fit(struct resource root, struct resource new);
fcb11918	151	extern void arch_remove_reservations(struct resource *avail);
1da177e4	152	extern int allocate_resource(struct resource root, struct resource new,
d75fc8bb GKH	153	resource_size_t size, resource_size_t min,
d75fc8bb GKH	154	resource_size_t max, resource_size_t align,
b26b2d49	155	resource_size_t (alignf)(void ,
3b7a17fc	156	const struct resource *,
b26b2d49 DB	157	resource_size_t,
b26b2d49 DB	158	resource_size_t),
1da177e4	159	void *alignf_data);
1c388919	160	struct resource lookup_resource(struct resource root, resource_size_t start);
d75fc8bb GKH	161	int adjust_resource(struct resource *res, resource_size_t start,
d75fc8bb GKH	162	resource_size_t size);
88452565	163	resource_size_t resource_alignment(struct resource *res);
f65380c0	164	static inline resource_size_t resource_size(const struct resource *res)
1a4e564b MD	165	{
	166	return res->end - res->start + 1;
	167	}
f65380c0	168	static inline unsigned long resource_type(const struct resource *res)
c9f66169 MD	169	{
	170	return res->flags & IORESOURCE_TYPE_BITS;
	171	}
1da177e4 LT	172
1da177e4 LT	173	/* Convenience shorthand with allocation */
8b6d043b AC	174	#define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0)
8b6d043b AC	175	#define request_muxed_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), IORESOURCE_MUXED)
e8de1481 AV	176	#define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl)
	177	#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0)
	178	#define request_mem_region_exclusive(start,n,name) \
	179	__request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE)
1da177e4 LT	180	#define rename_region(region, newname) do { (region)->name = (newname); } while (0)
1da177e4 LT	181
d75fc8bb GKH	182	extern struct resource * __request_region(struct resource *,
d75fc8bb GKH	183	resource_size_t start,
6ae301e8 RD	184	resource_size_t n,
6ae301e8 RD	185	const char *name, int flags);
1da177e4 LT	186
	187	/* Compatibility cruft */
	188	#define release_region(start,n) __release_region(&ioport_resource, (start), (n))
	189	#define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n))
	190	#define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n))
	191
d75fc8bb GKH	192	extern int __check_region(struct resource *, resource_size_t, resource_size_t);
	193	extern void __release_region(struct resource *, resource_size_t,
	194	resource_size_t);
825f787b TK	195	#ifdef CONFIG_MEMORY_HOTREMOVE
	196	extern int release_mem_region_adjustable(struct resource *, resource_size_t,
	197	resource_size_t);
	198	#endif
1da177e4	199
d75fc8bb GKH	200	static inline int __deprecated check_region(resource_size_t s,
d75fc8bb GKH	201	resource_size_t n)
1da177e4 LT	202	{
	203	return __check_region(&ioport_resource, s, n);
	204	}
9ac7849e TH	205
	206	/* Wrappers for managed devices */
	207	struct device;
	208	#define devm_request_region(dev,start,n,name) \
	209	__devm_request_region(dev, &ioport_resource, (start), (n), (name))
	210	#define devm_request_mem_region(dev,start,n,name) \
	211	__devm_request_region(dev, &iomem_resource, (start), (n), (name))
	212
	213	extern struct resource * __devm_request_region(struct device *dev,
	214	struct resource *parent, resource_size_t start,
	215	resource_size_t n, const char *name);
	216
dea420ce	217	#define devm_release_region(dev, start, n) \
9ac7849e	218	__devm_release_region(dev, &ioport_resource, (start), (n))
dea420ce	219	#define devm_release_mem_region(dev, start, n) \
9ac7849e TH	220	__devm_release_region(dev, &iomem_resource, (start), (n))
	221
	222	extern void __devm_release_region(struct device dev, struct resource parent,
	223	resource_size_t start, resource_size_t n);
379daf62	224	extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size);
e8de1481	225	extern int iomem_is_exclusive(u64 addr);
9ac7849e	226
908eedc6 KH	227	extern int
	228	walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
	229	void arg, int (func)(unsigned long, unsigned long, void *));
	230
74d24b21 WY	231	/* True if any part of r1 overlaps r2 */
	232	static inline bool resource_overlaps(struct resource r1, struct resource r2)
	233	{
	234	return (r1->start <= r2->end && r1->end >= r2->start);
	235	}
	236
	237
c9cce83d	238	#endif /* __ASSEMBLY__ */
1da177e4	239	#endif /* _LINUX_IOPORT_H */