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: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -109,6 +109,36 @@ struct resource_list {
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/* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */
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#define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */
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/* helpers to define resources */
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#define DEFINE_RES_NAMED(_start, _size, _name, _flags) \
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{ \
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.start = (_start), \
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.end = (_start) + (_size) - 1, \
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.name = (_name), \
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.flags = (_flags), \
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}
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#define DEFINE_RES_IO_NAMED(_start, _size, _name) \
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DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_IO)
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#define DEFINE_RES_IO(_start, _size) \
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DEFINE_RES_IO_NAMED((_start), (_size), NULL)
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#define DEFINE_RES_MEM_NAMED(_start, _size, _name) \
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DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_MEM)
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#define DEFINE_RES_MEM(_start, _size) \
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DEFINE_RES_MEM_NAMED((_start), (_size), NULL)
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#define DEFINE_RES_IRQ_NAMED(_irq, _name) \
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DEFINE_RES_NAMED((_irq), 1, (_name), IORESOURCE_IRQ)
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#define DEFINE_RES_IRQ(_irq) \
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DEFINE_RES_IRQ_NAMED((_irq), NULL)
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#define DEFINE_RES_DMA_NAMED(_dma, _name) \
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DEFINE_RES_NAMED((_dma), 1, (_name), IORESOURCE_DMA)
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#define DEFINE_RES_DMA(_dma) \
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DEFINE_RES_DMA_NAMED((_dma), NULL)
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/* PC/ISA/whatever - the normal PC address spaces: IO and memory */
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extern struct resource ioport_resource;
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extern struct resource iomem_resource;
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