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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.  
  8. #ifndef _LINUX_IOPORT_H
  9. #define _LINUX_IOPORT_H
  10.  
  11. #ifndef __ASSEMBLY__
  12. #include <linux/compiler.h>
  13. #include <linux/types.h>
  14. /*
  15.  * Resources are tree-like, allowing
  16.  * nesting etc..
  17.  */
  18. struct resource {
  19.         resource_size_t start;
  20.         resource_size_t end;
  21.         const char *name;
  22.         unsigned long flags;
  23.         struct resource *parent, *sibling, *child;
  24. };
  25.  
  26. struct resource_list {
  27.         struct resource_list *next;
  28.         struct resource *res;
  29.         struct pci_dev *dev;
  30. };
  31.  
  32. /*
  33.  * IO resources have these defined flags.
  34.  */
  35. #define IORESOURCE_BITS         0x000000ff      /* Bus-specific bits */
  36.  
  37. #define IORESOURCE_TYPE_BITS    0x00001f00      /* Resource type */
  38. #define IORESOURCE_IO           0x00000100      /* PCI/ISA I/O ports */
  39. #define IORESOURCE_MEM          0x00000200
  40. #define IORESOURCE_REG          0x00000300      /* Register offsets */
  41. #define IORESOURCE_IRQ          0x00000400
  42. #define IORESOURCE_DMA          0x00000800
  43. #define IORESOURCE_BUS          0x00001000
  44.  
  45. #define IORESOURCE_PREFETCH     0x00002000      /* No side effects */
  46. #define IORESOURCE_READONLY     0x00004000
  47. #define IORESOURCE_CACHEABLE    0x00008000
  48. #define IORESOURCE_RANGELENGTH  0x00010000
  49. #define IORESOURCE_SHADOWABLE   0x00020000
  50.  
  51. #define IORESOURCE_SIZEALIGN    0x00040000      /* size indicates alignment */
  52. #define IORESOURCE_STARTALIGN   0x00080000      /* start field is alignment */
  53.  
  54. #define IORESOURCE_MEM_64       0x00100000
  55. #define IORESOURCE_WINDOW       0x00200000      /* forwarded by bridge */
  56. #define IORESOURCE_MUXED        0x00400000      /* Resource is software muxed */
  57.  
  58. #define IORESOURCE_EXCLUSIVE    0x08000000      /* Userland may not map this resource */
  59. #define IORESOURCE_DISABLED     0x10000000
  60. #define IORESOURCE_UNSET        0x20000000      /* No address assigned yet */
  61. #define IORESOURCE_AUTO         0x40000000
  62. #define IORESOURCE_BUSY         0x80000000      /* Driver has marked this resource busy */
  63.  
  64. /* PnP IRQ specific bits (IORESOURCE_BITS) */
  65. #define IORESOURCE_IRQ_HIGHEDGE         (1<<0)
  66. #define IORESOURCE_IRQ_LOWEDGE          (1<<1)
  67. #define IORESOURCE_IRQ_HIGHLEVEL        (1<<2)
  68. #define IORESOURCE_IRQ_LOWLEVEL         (1<<3)
  69. #define IORESOURCE_IRQ_SHAREABLE        (1<<4)
  70. #define IORESOURCE_IRQ_OPTIONAL         (1<<5)
  71.  
  72. /* PnP DMA specific bits (IORESOURCE_BITS) */
  73. #define IORESOURCE_DMA_TYPE_MASK        (3<<0)
  74. #define IORESOURCE_DMA_8BIT             (0<<0)
  75. #define IORESOURCE_DMA_8AND16BIT        (1<<0)
  76. #define IORESOURCE_DMA_16BIT            (2<<0)
  77.  
  78. #define IORESOURCE_DMA_MASTER           (1<<2)
  79. #define IORESOURCE_DMA_BYTE             (1<<3)
  80. #define IORESOURCE_DMA_WORD             (1<<4)
  81.  
  82. #define IORESOURCE_DMA_SPEED_MASK       (3<<6)
  83. #define IORESOURCE_DMA_COMPATIBLE       (0<<6)
  84. #define IORESOURCE_DMA_TYPEA            (1<<6)
  85. #define IORESOURCE_DMA_TYPEB            (2<<6)
  86. #define IORESOURCE_DMA_TYPEF            (3<<6)
  87.  
  88. /* PnP memory I/O specific bits (IORESOURCE_BITS) */
  89. #define IORESOURCE_MEM_WRITEABLE        (1<<0)  /* dup: IORESOURCE_READONLY */
  90. #define IORESOURCE_MEM_CACHEABLE        (1<<1)  /* dup: IORESOURCE_CACHEABLE */
  91. #define IORESOURCE_MEM_RANGELENGTH      (1<<2)  /* dup: IORESOURCE_RANGELENGTH */
  92. #define IORESOURCE_MEM_TYPE_MASK        (3<<3)
  93. #define IORESOURCE_MEM_8BIT             (0<<3)
  94. #define IORESOURCE_MEM_16BIT            (1<<3)
  95. #define IORESOURCE_MEM_8AND16BIT        (2<<3)
  96. #define IORESOURCE_MEM_32BIT            (3<<3)
  97. #define IORESOURCE_MEM_SHADOWABLE       (1<<5)  /* dup: IORESOURCE_SHADOWABLE */
  98. #define IORESOURCE_MEM_EXPANSIONROM     (1<<6)
  99.  
  100. /* PnP I/O specific bits (IORESOURCE_BITS) */
  101. #define IORESOURCE_IO_16BIT_ADDR        (1<<0)
  102. #define IORESOURCE_IO_FIXED             (1<<1)
  103. #define IORESOURCE_IO_SPARSE            (1<<2)
  104.  
  105. /* PCI ROM control bits (IORESOURCE_BITS) */
  106. #define IORESOURCE_ROM_ENABLE           (1<<0)  /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
  107. #define IORESOURCE_ROM_SHADOW           (1<<1)  /* ROM is copy at C000:0 */
  108. #define IORESOURCE_ROM_COPY             (1<<2)  /* ROM is alloc'd copy, resource field overlaid */
  109. #define IORESOURCE_ROM_BIOS_COPY        (1<<3)  /* ROM is BIOS copy, resource field overlaid */
  110.  
  111. /* PCI control bits.  Shares IORESOURCE_BITS with above PCI ROM.  */
  112. #define IORESOURCE_PCI_FIXED            (1<<4)  /* Do not move resource */
  113.  
  114.  
  115. /* helpers to define resources */
  116. #define DEFINE_RES_NAMED(_start, _size, _name, _flags)                  \
  117.         {                                                               \
  118.                 .start = (_start),                                      \
  119.                 .end = (_start) + (_size) - 1,                          \
  120.                 .name = (_name),                                        \
  121.                 .flags = (_flags),                                      \
  122.         }
  123.  
  124. #define DEFINE_RES_IO_NAMED(_start, _size, _name)                       \
  125.         DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_IO)
  126. #define DEFINE_RES_IO(_start, _size)                                    \
  127.         DEFINE_RES_IO_NAMED((_start), (_size), NULL)
  128.  
  129. #define DEFINE_RES_MEM_NAMED(_start, _size, _name)                      \
  130.         DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_MEM)
  131. #define DEFINE_RES_MEM(_start, _size)                                   \
  132.         DEFINE_RES_MEM_NAMED((_start), (_size), NULL)
  133.  
  134. #define DEFINE_RES_IRQ_NAMED(_irq, _name)                               \
  135.         DEFINE_RES_NAMED((_irq), 1, (_name), IORESOURCE_IRQ)
  136. #define DEFINE_RES_IRQ(_irq)                                            \
  137.         DEFINE_RES_IRQ_NAMED((_irq), NULL)
  138.  
  139. #define DEFINE_RES_DMA_NAMED(_dma, _name)                               \
  140.         DEFINE_RES_NAMED((_dma), 1, (_name), IORESOURCE_DMA)
  141. #define DEFINE_RES_DMA(_dma)                                            \
  142.         DEFINE_RES_DMA_NAMED((_dma), NULL)
  143.  
  144. /* PC/ISA/whatever - the normal PC address spaces: IO and memory */
  145. extern struct resource ioport_resource;
  146. extern struct resource iomem_resource;
  147.  
  148. extern struct resource *request_resource_conflict(struct resource *root, struct resource *new);
  149. extern int request_resource(struct resource *root, struct resource *new);
  150. extern int release_resource(struct resource *new);
  151. void release_child_resources(struct resource *new);
  152. extern void reserve_region_with_split(struct resource *root,
  153.                              resource_size_t start, resource_size_t end,
  154.                              const char *name);
  155. extern struct resource *insert_resource_conflict(struct resource *parent, struct resource *new);
  156. extern int insert_resource(struct resource *parent, struct resource *new);
  157. extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new);
  158. extern void arch_remove_reservations(struct resource *avail);
  159. extern int allocate_resource(struct resource *root, struct resource *new,
  160.                              resource_size_t size, resource_size_t min,
  161.                              resource_size_t max, resource_size_t align,
  162.                              resource_size_t (*alignf)(void *,
  163.                                                        const struct resource *,
  164.                                                        resource_size_t,
  165.                                                        resource_size_t),
  166.                              void *alignf_data);
  167. struct resource *lookup_resource(struct resource *root, resource_size_t start);
  168. int adjust_resource(struct resource *res, resource_size_t start,
  169.                     resource_size_t size);
  170. resource_size_t resource_alignment(struct resource *res);
  171. static inline resource_size_t resource_size(const struct resource *res)
  172. {
  173.         return res->end - res->start + 1;
  174. }
  175. static inline unsigned long resource_type(const struct resource *res)
  176. {
  177.         return res->flags & IORESOURCE_TYPE_BITS;
  178. }
  179.  
  180.  
  181. #endif /* __ASSEMBLY__ */
  182. #endif  /* _LINUX_IOPORT_H */
  183.