Commit a0e44d4a authored by Uwe Kleine-König's avatar Uwe Kleine-König Committed by Linus Torvalds
Browse files

include/linux/ioport.h: new helper to define common struct resource constructs 



Resource definitions that just define start, end and flags =
IORESOURCE_MEM or IORESOURCE_IRQ (with start=end) are quite common.  So
introduce a shortcut for them.  For completeness add macros for
IORESOURCE_DMA and IORESOURCE_IO, too and also make available a set of
macros to specify named resources of all types which are less common.

Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent ae891a1b

include/linux/ioport.h

+30 −0
Original line number Diff line number Diff line
@@ -109,6 +109,36 @@ struct resource_list { 
/* 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;

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