LXR linux/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#include <linux/compiler.h>
  12/*
  13 * Resources are tree-like, allowing
  14 * nesting etc..
  15 */
  16struct resource {
  17        const char *name;
  18        unsigned long start, end;
  19        unsigned long flags;
  20        struct resource *parent, *sibling, *child;
  21};
  22
  23struct resource_list {
  24        struct resource_list *next;
  25        struct resource *res;
  26        struct pci_dev *dev;
  27};
  28
  29/*
  30 * IO resources have these defined flags.
  31 */
  32#define IORESOURCE_BITS         0x000000ff      /* Bus-specific bits */
  33
  34#define IORESOURCE_IO           0x00000100      /* Resource type */
  35#define IORESOURCE_MEM          0x00000200
  36#define IORESOURCE_IRQ          0x00000400
  37#define IORESOURCE_DMA          0x00000800
  38
  39#define IORESOURCE_PREFETCH     0x00001000      /* No side effects */
  40#define IORESOURCE_READONLY     0x00002000
  41#define IORESOURCE_CACHEABLE    0x00004000
  42#define IORESOURCE_RANGELENGTH  0x00008000
  43#define IORESOURCE_SHADOWABLE   0x00010000
  44#define IORESOURCE_BUS_HAS_VGA  0x00080000
  45
  46#define IORESOURCE_DISABLED     0x10000000
  47#define IORESOURCE_UNSET        0x20000000
  48#define IORESOURCE_AUTO         0x40000000
  49#define IORESOURCE_BUSY         0x80000000      /* Driver has marked this resource busy */
  50
  51/* ISA PnP IRQ specific bits (IORESOURCE_BITS) */
  52#define IORESOURCE_IRQ_HIGHEDGE         (1<<0)
  53#define IORESOURCE_IRQ_LOWEDGE          (1<<1)
  54#define IORESOURCE_IRQ_HIGHLEVEL        (1<<2)
  55#define IORESOURCE_IRQ_LOWLEVEL         (1<<3)
  56
  57/* ISA PnP DMA specific bits (IORESOURCE_BITS) */
  58#define IORESOURCE_DMA_TYPE_MASK        (3<<0)
  59#define IORESOURCE_DMA_8BIT             (0<<0)
  60#define IORESOURCE_DMA_8AND16BIT        (1<<0)
  61#define IORESOURCE_DMA_16BIT            (2<<0)
  62
  63#define IORESOURCE_DMA_MASTER           (1<<2)
  64#define IORESOURCE_DMA_BYTE             (1<<3)
  65#define IORESOURCE_DMA_WORD             (1<<4)
  66
  67#define IORESOURCE_DMA_SPEED_MASK       (3<<6)
  68#define IORESOURCE_DMA_COMPATIBLE       (0<<6)
  69#define IORESOURCE_DMA_TYPEA            (1<<6)
  70#define IORESOURCE_DMA_TYPEB            (2<<6)
  71#define IORESOURCE_DMA_TYPEF            (3<<6)
  72
  73/* ISA PnP memory I/O specific bits (IORESOURCE_BITS) */
  74#define IORESOURCE_MEM_WRITEABLE        (1<<0)  /* dup: IORESOURCE_READONLY */
  75#define IORESOURCE_MEM_CACHEABLE        (1<<1)  /* dup: IORESOURCE_CACHEABLE */
  76#define IORESOURCE_MEM_RANGELENGTH      (1<<2)  /* dup: IORESOURCE_RANGELENGTH */
  77#define IORESOURCE_MEM_TYPE_MASK        (3<<3)
  78#define IORESOURCE_MEM_8BIT             (0<<3)
  79#define IORESOURCE_MEM_16BIT            (1<<3)
  80#define IORESOURCE_MEM_8AND16BIT        (2<<3)
  81#define IORESOURCE_MEM_32BIT            (3<<3)
  82#define IORESOURCE_MEM_SHADOWABLE       (1<<5)  /* dup: IORESOURCE_SHADOWABLE */
  83#define IORESOURCE_MEM_EXPANSIONROM     (1<<6)
  84
  85/* PCI ROM control bits (IORESOURCE_BITS) */
  86#define IORESOURCE_ROM_ENABLE           (1<<0)  /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
  87#define IORESOURCE_ROM_SHADOW           (1<<1)  /* ROM is copy at C000:0 */
  88#define IORESOURCE_ROM_COPY             (1<<2)  /* ROM is alloc'd copy, resource field overlaid */
  89
  90/* PC/ISA/whatever - the normal PC address spaces: IO and memory */
  91extern struct resource ioport_resource;
  92extern struct resource iomem_resource;
  93
  94extern int get_resource_list(struct resource *, char *buf, int size);
  95
  96extern int request_resource(struct resource *root, struct resource *new);
  97extern struct resource * ____request_resource(struct resource *root, struct resource *new);
  98extern int release_resource(struct resource *new);
  99extern int insert_resource(struct resource *parent, struct resource *new);
 100extern int allocate_resource(struct resource *root, struct resource *new,
 101                             unsigned long size,
 102                             unsigned long min, unsigned long max,
 103                             unsigned long align,
 104                             void (*alignf)(void *, struct resource *,
 105                                            unsigned long, unsigned long),
 106                             void *alignf_data);
 107int adjust_resource(struct resource *res, unsigned long start,
 108                    unsigned long size);
 109
 110/* Convenience shorthand with allocation */
 111#define request_region(start,n,name)    __request_region(&ioport_resource, (start), (n), (name))
 112#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name))
 113#define rename_region(region, newname) do { (region)->name = (newname); } while (0)
 114
 115extern struct resource * __request_region(struct resource *, unsigned long start, unsigned long n, const char *name);
 116
 117/* Compatibility cruft */
 118#define release_region(start,n) __release_region(&ioport_resource, (start), (n))
 119#define check_mem_region(start,n)       __check_region(&iomem_resource, (start), (n))
 120#define release_mem_region(start,n)     __release_region(&iomem_resource, (start), (n))
 121
 122extern int __check_region(struct resource *, unsigned long, unsigned long);
 123extern void __release_region(struct resource *, unsigned long, unsigned long);
 124
 125static inline int __deprecated check_region(unsigned long s, unsigned long n)
 126{
 127        return __check_region(&ioport_resource, s, n);
 128}
 129#endif  /* _LINUX_IOPORT_H */
 130