ioport.h 5.8 KB

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  1. /*
  2. * ioport.h Definitions of routines for detecting, reserving and
  3. * allocating system resources.
  4. *
  5. * Authors: Linus Torvalds
  6. */
  7. #ifndef _LINUX_IOPORT_H
  8. #define _LINUX_IOPORT_H
  9. #include <linux/compiler.h>
  10. #include <linux/types.h>
  11. /*
  12. * Resources are tree-like, allowing
  13. * nesting etc..
  14. */
  15. struct resource {
  16. resource_size_t start;
  17. resource_size_t end;
  18. const char *name;
  19. unsigned long flags;
  20. struct resource *parent, *sibling, *child;
  21. };
  22. struct resource_list {
  23. struct resource_list *next;
  24. struct resource *res;
  25. struct pci_dev *dev;
  26. };
  27. /*
  28. * IO resources have these defined flags.
  29. */
  30. #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */
  31. #define IORESOURCE_IO 0x00000100 /* Resource type */
  32. #define IORESOURCE_MEM 0x00000200
  33. #define IORESOURCE_IRQ 0x00000400
  34. #define IORESOURCE_DMA 0x00000800
  35. #define IORESOURCE_PREFETCH 0x00001000 /* No side effects */
  36. #define IORESOURCE_READONLY 0x00002000
  37. #define IORESOURCE_CACHEABLE 0x00004000
  38. #define IORESOURCE_RANGELENGTH 0x00008000
  39. #define IORESOURCE_SHADOWABLE 0x00010000
  40. #define IORESOURCE_BUS_HAS_VGA 0x00080000
  41. #define IORESOURCE_DISABLED 0x10000000
  42. #define IORESOURCE_UNSET 0x20000000
  43. #define IORESOURCE_AUTO 0x40000000
  44. #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */
  45. /* ISA PnP IRQ specific bits (IORESOURCE_BITS) */
  46. #define IORESOURCE_IRQ_HIGHEDGE (1<<0)
  47. #define IORESOURCE_IRQ_LOWEDGE (1<<1)
  48. #define IORESOURCE_IRQ_HIGHLEVEL (1<<2)
  49. #define IORESOURCE_IRQ_LOWLEVEL (1<<3)
  50. #define IORESOURCE_IRQ_SHAREABLE (1<<4)
  51. /* ISA PnP DMA specific bits (IORESOURCE_BITS) */
  52. #define IORESOURCE_DMA_TYPE_MASK (3<<0)
  53. #define IORESOURCE_DMA_8BIT (0<<0)
  54. #define IORESOURCE_DMA_8AND16BIT (1<<0)
  55. #define IORESOURCE_DMA_16BIT (2<<0)
  56. #define IORESOURCE_DMA_MASTER (1<<2)
  57. #define IORESOURCE_DMA_BYTE (1<<3)
  58. #define IORESOURCE_DMA_WORD (1<<4)
  59. #define IORESOURCE_DMA_SPEED_MASK (3<<6)
  60. #define IORESOURCE_DMA_COMPATIBLE (0<<6)
  61. #define IORESOURCE_DMA_TYPEA (1<<6)
  62. #define IORESOURCE_DMA_TYPEB (2<<6)
  63. #define IORESOURCE_DMA_TYPEF (3<<6)
  64. /* ISA PnP memory I/O specific bits (IORESOURCE_BITS) */
  65. #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */
  66. #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */
  67. #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */
  68. #define IORESOURCE_MEM_TYPE_MASK (3<<3)
  69. #define IORESOURCE_MEM_8BIT (0<<3)
  70. #define IORESOURCE_MEM_16BIT (1<<3)
  71. #define IORESOURCE_MEM_8AND16BIT (2<<3)
  72. #define IORESOURCE_MEM_32BIT (3<<3)
  73. #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */
  74. #define IORESOURCE_MEM_EXPANSIONROM (1<<6)
  75. /* PCI ROM control bits (IORESOURCE_BITS) */
  76. #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
  77. #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */
  78. #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */
  79. #define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */
  80. /* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */
  81. #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */
  82. /* PC/ISA/whatever - the normal PC address spaces: IO and memory */
  83. extern struct resource ioport_resource;
  84. extern struct resource iomem_resource;
  85. extern int request_resource(struct resource *root, struct resource *new);
  86. extern struct resource * ____request_resource(struct resource *root, struct resource *new);
  87. extern int release_resource(struct resource *new);
  88. extern int insert_resource(struct resource *parent, struct resource *new);
  89. extern int allocate_resource(struct resource *root, struct resource *new,
  90. resource_size_t size, resource_size_t min,
  91. resource_size_t max, resource_size_t align,
  92. void (*alignf)(void *, struct resource *,
  93. resource_size_t, resource_size_t),
  94. void *alignf_data);
  95. int adjust_resource(struct resource *res, resource_size_t start,
  96. resource_size_t size);
  97. /* get registered SYSTEM_RAM resources in specified area */
  98. extern int find_next_system_ram(struct resource *res);
  99. /* Convenience shorthand with allocation */
  100. #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name))
  101. #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name))
  102. #define rename_region(region, newname) do { (region)->name = (newname); } while (0)
  103. extern struct resource * __request_region(struct resource *,
  104. resource_size_t start,
  105. resource_size_t n, const char *name);
  106. /* Compatibility cruft */
  107. #define release_region(start,n) __release_region(&ioport_resource, (start), (n))
  108. #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n))
  109. #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n))
  110. extern int __check_region(struct resource *, resource_size_t, resource_size_t);
  111. extern void __release_region(struct resource *, resource_size_t,
  112. resource_size_t);
  113. static inline int __deprecated check_region(resource_size_t s,
  114. resource_size_t n)
  115. {
  116. return __check_region(&ioport_resource, s, n);
  117. }
  118. /* Wrappers for managed devices */
  119. struct device;
  120. #define devm_request_region(dev,start,n,name) \
  121. __devm_request_region(dev, &ioport_resource, (start), (n), (name))
  122. #define devm_request_mem_region(dev,start,n,name) \
  123. __devm_request_region(dev, &iomem_resource, (start), (n), (name))
  124. extern struct resource * __devm_request_region(struct device *dev,
  125. struct resource *parent, resource_size_t start,
  126. resource_size_t n, const char *name);
  127. #define devm_release_region(start,n) \
  128. __devm_release_region(dev, &ioport_resource, (start), (n))
  129. #define devm_release_mem_region(start,n) \
  130. __devm_release_region(dev, &iomem_resource, (start), (n))
  131. extern void __devm_release_region(struct device *dev, struct resource *parent,
  132. resource_size_t start, resource_size_t n);
  133. #endif /* _LINUX_IOPORT_H */