ioport.h
上传用户:sy_wanhua
上传日期:2013-07-25
资源大小:3048k
文件大小:4k
- /*
- * ioport.h Definitions of routines for detecting, reserving and
- * allocating system resources.
- *
- * Authors: Linus Torvalds
- */
- #ifndef _LINUX_IOPORT_H
- #define _LINUX_IOPORT_H
- /*
- * Resources are tree-like, allowing
- * nesting etc..
- */
- struct resource {
- const char *name;
- unsigned long start, end;
- unsigned long flags;
- struct resource *parent, *sibling, *child;
- };
- /*
- * IO resources have these defined flags.
- */
- #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */
- #define IORESOURCE_IO 0x00000100 /* Resource type */
- #define IORESOURCE_MEM 0x00000200
- #define IORESOURCE_IRQ 0x00000400
- #define IORESOURCE_DMA 0x00000800
- #define IORESOURCE_PREFETCH 0x00001000 /* No side effects */
- #define IORESOURCE_READONLY 0x00002000
- #define IORESOURCE_CACHEABLE 0x00004000
- #define IORESOURCE_RANGELENGTH 0x00008000
- #define IORESOURCE_SHADOWABLE 0x00010000
- #define IORESOURCE_UNSET 0x20000000
- #define IORESOURCE_AUTO 0x40000000
- #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */
- /* ISA 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)
- /* ISA 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)
- /* ISA 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_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */
- #define IORESOURCE_MEM_EXPANSIONROM (1<<6)
- /* PC/ISA/whatever - the normal PC address spaces: IO and memory */
- extern struct resource ioport_resource;
- extern struct resource iomem_resource;
- extern int get_resource_list(struct resource *, char *buf, int size);
- extern int request_resource(struct resource *root, struct resource *new);
- extern int release_resource(struct resource *new);
- extern int allocate_resource(struct resource *root, struct resource *new,
- unsigned long size,
- unsigned long min, unsigned long max,
- unsigned long align);
- /* Convenience shorthand with allocation */
- #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name))
- #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name))
- extern struct resource * __request_region(struct resource *, unsigned long start, unsigned long n, const char *name);
- /* Compatibility cruft */
- #define check_region(start,n) __check_region(&ioport_resource, (start), (n))
- #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 *, unsigned long, unsigned long);
- extern void __release_region(struct resource *, unsigned long, unsigned long);
- #define get_ioport_list(buf) get_resource_list(&ioport_resource, buf, PAGE_SIZE)
- #define get_mem_list(buf) get_resource_list(&iomem_resource, buf, PAGE_SIZE)
- #define HAVE_AUTOIRQ
- extern void autoirq_setup(int waittime);
- extern int autoirq_report(int waittime);
- #endif /* _LINUX_IOPORT_H */