ioport.h 7.1 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192
  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. #ifndef __ASSEMBLY__
  10. #include <linux/compiler.h>
  11. #include <linux/types.h>
  12. /*
  13. * Resources are tree-like, allowing
  14. * nesting etc..
  15. */
  16. struct resource {
  17. resource_size_t start;
  18. resource_size_t end;
  19. const char *name;
  20. unsigned long flags;
  21. struct resource *parent, *sibling, *child;
  22. };
  23. struct resource_list {
  24. struct resource_list *next;
  25. struct resource *res;
  26. struct pci_dev *dev;
  27. };
  28. /*
  29. * IO resources have these defined flags.
  30. */
  31. #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */
  32. #define IORESOURCE_TYPE_BITS 0x00000f00 /* Resource type */
  33. #define IORESOURCE_IO 0x00000100
  34. #define IORESOURCE_MEM 0x00000200
  35. #define IORESOURCE_IRQ 0x00000400
  36. #define IORESOURCE_DMA 0x00000800
  37. #define IORESOURCE_PREFETCH 0x00001000 /* No side effects */
  38. #define IORESOURCE_READONLY 0x00002000
  39. #define IORESOURCE_CACHEABLE 0x00004000
  40. #define IORESOURCE_RANGELENGTH 0x00008000
  41. #define IORESOURCE_SHADOWABLE 0x00010000
  42. #define IORESOURCE_SIZEALIGN 0x00020000 /* size indicates alignment */
  43. #define IORESOURCE_STARTALIGN 0x00040000 /* start field is alignment */
  44. #define IORESOURCE_MEM_64 0x00100000
  45. #define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */
  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. /* PnP IRQ specific bits (IORESOURCE_BITS) */
  51. #define IORESOURCE_IRQ_HIGHEDGE (1<<0)
  52. #define IORESOURCE_IRQ_LOWEDGE (1<<1)
  53. #define IORESOURCE_IRQ_HIGHLEVEL (1<<2)
  54. #define IORESOURCE_IRQ_LOWLEVEL (1<<3)
  55. #define IORESOURCE_IRQ_SHAREABLE (1<<4)
  56. #define IORESOURCE_IRQ_OPTIONAL (1<<5)
  57. /* 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. #define IORESOURCE_DMA_MASTER (1<<2)
  63. #define IORESOURCE_DMA_BYTE (1<<3)
  64. #define IORESOURCE_DMA_WORD (1<<4)
  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. /* PnP memory I/O specific bits (IORESOURCE_BITS) */
  71. #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */
  72. #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */
  73. #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */
  74. #define IORESOURCE_MEM_TYPE_MASK (3<<3)
  75. #define IORESOURCE_MEM_8BIT (0<<3)
  76. #define IORESOURCE_MEM_16BIT (1<<3)
  77. #define IORESOURCE_MEM_8AND16BIT (2<<3)
  78. #define IORESOURCE_MEM_32BIT (3<<3)
  79. #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */
  80. #define IORESOURCE_MEM_EXPANSIONROM (1<<6)
  81. /* PnP I/O specific bits (IORESOURCE_BITS) */
  82. #define IORESOURCE_IO_16BIT_ADDR (1<<0)
  83. #define IORESOURCE_IO_FIXED (1<<1)
  84. /* PCI ROM control bits (IORESOURCE_BITS) */
  85. #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
  86. #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */
  87. #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */
  88. #define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */
  89. /* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */
  90. #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */
  91. /* PC/ISA/whatever - the normal PC address spaces: IO and memory */
  92. extern struct resource ioport_resource;
  93. extern struct resource iomem_resource;
  94. extern int request_resource(struct resource *root, struct resource *new);
  95. extern int release_resource(struct resource *new);
  96. extern void reserve_region_with_split(struct resource *root,
  97. resource_size_t start, resource_size_t end,
  98. const char *name);
  99. extern int insert_resource(struct resource *parent, struct resource *new);
  100. extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new);
  101. extern int allocate_resource(struct resource *root, struct resource *new,
  102. resource_size_t size, resource_size_t min,
  103. resource_size_t max, resource_size_t align,
  104. void (*alignf)(void *, struct resource *,
  105. resource_size_t, resource_size_t),
  106. void *alignf_data);
  107. int adjust_resource(struct resource *res, resource_size_t start,
  108. resource_size_t size);
  109. resource_size_t resource_alignment(struct resource *res);
  110. static inline resource_size_t resource_size(const struct resource *res)
  111. {
  112. return res->end - res->start + 1;
  113. }
  114. static inline unsigned long resource_type(const struct resource *res)
  115. {
  116. return res->flags & IORESOURCE_TYPE_BITS;
  117. }
  118. /* Convenience shorthand with allocation */
  119. #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0)
  120. #define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl)
  121. #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0)
  122. #define request_mem_region_exclusive(start,n,name) \
  123. __request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE)
  124. #define rename_region(region, newname) do { (region)->name = (newname); } while (0)
  125. extern struct resource * __request_region(struct resource *,
  126. resource_size_t start,
  127. resource_size_t n,
  128. const char *name, int flags);
  129. /* Compatibility cruft */
  130. #define release_region(start,n) __release_region(&ioport_resource, (start), (n))
  131. #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n))
  132. #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n))
  133. extern int __check_region(struct resource *, resource_size_t, resource_size_t);
  134. extern void __release_region(struct resource *, resource_size_t,
  135. resource_size_t);
  136. static inline int __deprecated check_region(resource_size_t s,
  137. resource_size_t n)
  138. {
  139. return __check_region(&ioport_resource, s, n);
  140. }
  141. /* Wrappers for managed devices */
  142. struct device;
  143. #define devm_request_region(dev,start,n,name) \
  144. __devm_request_region(dev, &ioport_resource, (start), (n), (name))
  145. #define devm_request_mem_region(dev,start,n,name) \
  146. __devm_request_region(dev, &iomem_resource, (start), (n), (name))
  147. extern struct resource * __devm_request_region(struct device *dev,
  148. struct resource *parent, resource_size_t start,
  149. resource_size_t n, const char *name);
  150. #define devm_release_region(dev, start, n) \
  151. __devm_release_region(dev, &ioport_resource, (start), (n))
  152. #define devm_release_mem_region(dev, start, n) \
  153. __devm_release_region(dev, &iomem_resource, (start), (n))
  154. extern void __devm_release_region(struct device *dev, struct resource *parent,
  155. resource_size_t start, resource_size_t n);
  156. extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size);
  157. extern int iomem_is_exclusive(u64 addr);
  158. extern int
  159. walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
  160. void *arg, int (*func)(unsigned long, unsigned long, void *));
  161. #endif /* __ASSEMBLY__ */
  162. #endif /* _LINUX_IOPORT_H */