LXR linux-old/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 */
  15struct resource {
  16        const char *name;
  17        unsigned long start, end;
  18        unsigned long flags;
  19        struct resource *parent, *sibling, *child;
  20};
  21
  22struct resource_list {
  23        struct resource_list *next;
  24        struct resource *res;
  25        struct pci_dev *dev;
  26};
  27
  28/*
  29 * IO resources have these defined flags.
  30 */
  31#define IORESOURCE_BITS         0x000000ff      /* Bus-specific bits */
  32
  33#define IORESOURCE_IO           0x00000100      /* Resource type */
  34#define IORESOURCE_MEM          0x00000200
  35#define IORESOURCE_IRQ          0x00000400
  36#define IORESOURCE_DMA          0x00000800
  37
  38#define IORESOURCE_PREFETCH     0x00001000      /* No side effects */
  39#define IORESOURCE_READONLY     0x00002000
  40#define IORESOURCE_CACHEABLE    0x00004000
  41#define IORESOURCE_RANGELENGTH  0x00008000
  42#define IORESOURCE_SHADOWABLE   0x00010000
  43#define IORESOURCE_BUS_HAS_VGA  0x00080000
  44
  45#define IORESOURCE_UNSET        0x20000000
  46#define IORESOURCE_AUTO         0x40000000
  47#define IORESOURCE_BUSY         0x80000000      /* Driver has marked this resource busy */
  48
  49/* ISA PnP IRQ specific bits (IORESOURCE_BITS) */
  50#define IORESOURCE_IRQ_HIGHEDGE         (1<<0)
  51#define IORESOURCE_IRQ_LOWEDGE          (1<<1)
  52#define IORESOURCE_IRQ_HIGHLEVEL        (1<<2)
  53#define IORESOURCE_IRQ_LOWLEVEL         (1<<3)
  54
  55/* ISA PnP DMA specific bits (IORESOURCE_BITS) */
  56#define IORESOURCE_DMA_TYPE_MASK        (3<<0)
  57#define IORESOURCE_DMA_8BIT             (0<<0)
  58#define IORESOURCE_DMA_8AND16BIT        (1<<0)
  59#define IORESOURCE_DMA_16BIT            (2<<0)
  60
  61#define IORESOURCE_DMA_MASTER           (1<<2)
  62#define IORESOURCE_DMA_BYTE             (1<<3)
  63#define IORESOURCE_DMA_WORD             (1<<4)
  64
  65#define IORESOURCE_DMA_SPEED_MASK       (3<<6)
  66#define IORESOURCE_DMA_COMPATIBLE       (0<<6)
  67#define IORESOURCE_DMA_TYPEA            (1<<6)
  68#define IORESOURCE_DMA_TYPEB            (2<<6)
  69#define IORESOURCE_DMA_TYPEF            (3<<6)
  70
  71/* ISA PnP memory I/O specific bits (IORESOURCE_BITS) */
  72#define IORESOURCE_MEM_WRITEABLE        (1<<0)  /* dup: IORESOURCE_READONLY */
  73#define IORESOURCE_MEM_CACHEABLE        (1<<1)  /* dup: IORESOURCE_CACHEABLE */
  74#define IORESOURCE_MEM_RANGELENGTH      (1<<2)  /* dup: IORESOURCE_RANGELENGTH */
  75#define IORESOURCE_MEM_TYPE_MASK        (3<<3)
  76#define IORESOURCE_MEM_8BIT             (0<<3)
  77#define IORESOURCE_MEM_16BIT            (1<<3)
  78#define IORESOURCE_MEM_8AND16BIT        (2<<3)
  79#define IORESOURCE_MEM_SHADOWABLE       (1<<5)  /* dup: IORESOURCE_SHADOWABLE */
  80#define IORESOURCE_MEM_EXPANSIONROM     (1<<6)
  81
  82/* PC/ISA/whatever - the normal PC address spaces: IO and memory */
  83extern struct resource ioport_resource;
  84extern struct resource iomem_resource;
  85
  86extern int check_resource(struct resource *root, unsigned long, unsigned long);
  87extern int request_resource(struct resource *root, struct resource *new);
  88extern int release_resource(struct resource *new);
  89extern int allocate_resource(struct resource *root, struct resource *new,
  90                             unsigned long size,
  91                             unsigned long min, unsigned long max,
  92                             unsigned long align,
  93                             void (*alignf)(void *, struct resource *,
  94                                            unsigned long, unsigned long),
  95                             void *alignf_data);
  96
  97/* Convenience shorthand with allocation */
  98#define request_region(start,n,name)    __request_region(&ioport_resource, (start), (n), (name))
  99#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name))
 100
 101extern struct resource * __request_region(struct resource *, unsigned long start, unsigned long n, const char *name);
 102
 103/* Compatibility cruft */
 104#define check_region(start,n)   __check_region(&ioport_resource, (start), (n))
 105#define release_region(start,n) __release_region(&ioport_resource, (start), (n))
 106#define check_mem_region(start,n)       __check_region(&iomem_resource, (start), (n))
 107#define release_mem_region(start,n)     __release_region(&iomem_resource, (start), (n))
 108
 109extern int __check_region(struct resource *, unsigned long, unsigned long);
 110extern void __release_region(struct resource *, unsigned long, unsigned long);
 111
 112#define HAVE_AUTOIRQ
 113extern void autoirq_setup(int waittime);
 114extern int autoirq_report(int waittime);
 115
 116#endif  /* _LINUX_IOPORT_H */
 117