include/linux/ioport.h

   1 /*
   2  * ioport.h     Definitions of routines for detecting, reserving and
   3  *              allocating system resources.
   4  *
   5  * Authors:     Linus Torvalds
   6  */
   7
   8 #ifndef _LINUX_IOPORT_H
   9 #define _LINUX_IOPORT_H
  10
  11 /*
  12  * Resources are tree-like, allowing
  13  * nesting etc..
  14  */
  15 struct resource {
  16         const char *name;
  17         unsigned long start, end;
  18         unsigned long flags;
  19         struct resource *parent, *sibling, *child;
  20 };
  21
  22 /*
  23  * IO resources have these defined flags.
  24  */
  25 #define IORESOURCE_BITS         0x000000ff      /* Bus-specific bits */
  26
  27 #define IORESOURCE_IO           0x00000100      /* Resource type */
  28 #define IORESOURCE_MEM          0x00000200
  29 #define IORESOURCE_IRQ          0x00000400
  30 #define IORESOURCE_DMA          0x00000800
  31
  32 #define IORESOURCE_PREFETCH     0x00001000      /* No side effects */
  33 #define IORESOURCE_READONLY     0x00002000
  34 #define IORESOURCE_CACHEABLE    0x00004000
  35 #define IORESOURCE_RANGELENGTH  0x00008000
  36 #define IORESOURCE_SHADOWABLE   0x00010000
  37
  38 #define IORESOURCE_UNSET        0x00020000
  39 #define IORESOURCE_AUTO         0x00040000
  40
  41 #define IORESOURCE_BUSY         0x80000000      /* Driver has marked this resource busy */
  42
  43 /* PC/ISA/whatever - the normal PC address spaces: IO and memory */
  44 extern struct resource ioport_resource;
  45 extern struct resource iomem_resource;
  46
  47 extern int get_resource_list(struct resource *, char *buf, int size);
  48
  49 extern int request_resource(struct resource *root, struct resource *new);
  50 extern int release_resource(struct resource *new);
  51
  52 /* Convenience shorthand with allocation */
  53 #define request_region(start,n,name)    __request_region(&ioport_resource, (start), (n), (name))
  54 extern struct resource * __request_region(struct resource *, unsigned long start, unsigned long n, const char *name);
  55
  56 /* Compatibility cruft */
  57 #define check_region(start,n)   __check_region(&ioport_resource, (start), (n))
  58 #define release_region(start,n) __release_region(&ioport_resource, (start), (n))
  59 extern int __check_region(struct resource *, unsigned long, unsigned long);
  60 extern void __release_region(struct resource *, unsigned long, unsigned long);
  61
  62 #define get_ioport_list(buf)    get_resource_list(&ioport_resource, buf, PAGE_SIZE)
  63 #define get_mem_list(buf)       get_resource_list(&iomem_resource, buf, PAGE_SIZE)
  64
  65 #define HAVE_AUTOIRQ
  66 extern void autoirq_setup(int waittime);
  67 extern int autoirq_report(int waittime);
  68
  69 #endif  /* _LINUX_IOPORT_H */