[PATCH v2] new helper to define common struct resource constructs
From: Uwe Kleine-König <hidden>
Date: 2011-07-12 18:31:31
Also in:
lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
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. Signed-off-by: Uwe Kleine-K?nig <redacted> --- changes since v1: - also add _IO and _DMA variants include/linux/ioport.h | 30 ++++++++++++++++++++++++++++++ 1 files changed, 30 insertions(+), 0 deletions(-)
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 63eb429..f98124f 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h@@ -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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1.7.5.4