Subversion Repositories shark

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

#ifndef _LINUX_IOPORT_H
#define _LINUX_IOPORT_H

#include <linux/compiler.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;
};

struct resource_list {
        struct resource_list *next;
        struct resource *res;
        struct pci_dev *dev;
};

/*
 * 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_BUS_HAS_VGA  0x00080000

#define IORESOURCE_DISABLED     0x10000000
#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_32BIT            (3<<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 struct resource * ____request_resource(struct resource *root, struct resource *new);
extern int release_resource(struct resource *new);
extern int insert_resource(struct resource *parent, 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,
                             void (*alignf)(void *, struct resource *,
                                            unsigned long, unsigned long),
                             void *alignf_data);

/* 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))
#define rename_region(region, newname) do { (region)->name = (newname); } while (0)

extern struct resource * __request_region(struct resource *, unsigned long start, unsigned long n, const char *name);

/* 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 *, unsigned long, unsigned long);
extern void __release_region(struct resource *, unsigned long, unsigned long);

static inline int __deprecated check_region(unsigned long s, unsigned long n)
{
        return __check_region(&ioport_resource, s, n);
}
#endif  /* _LINUX_IOPORT_H */