Subversion Repositories Kolibri OS

Rev

Rev 6936 | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  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.         unsigned long desc;
  24.         struct resource *parent, *sibling, *child;
  25. };
  26.  
  27. /*
  28.  * IO resources have these defined flags.
  29.  */
  30. #define IORESOURCE_BITS         0x000000ff      /* Bus-specific bits */
  31.  
  32. #define IORESOURCE_TYPE_BITS    0x00001f00      /* Resource type */
  33. #define IORESOURCE_IO           0x00000100      /* PCI/ISA I/O ports */
  34. #define IORESOURCE_MEM          0x00000200
  35. #define IORESOURCE_REG          0x00000300      /* Register offsets */
  36. #define IORESOURCE_IRQ          0x00000400
  37. #define IORESOURCE_DMA          0x00000800
  38. #define IORESOURCE_BUS          0x00001000
  39.  
  40. #define IORESOURCE_PREFETCH     0x00002000      /* No side effects */
  41. #define IORESOURCE_READONLY     0x00004000
  42. #define IORESOURCE_CACHEABLE    0x00008000
  43. #define IORESOURCE_RANGELENGTH  0x00010000
  44. #define IORESOURCE_SHADOWABLE   0x00020000
  45.  
  46. #define IORESOURCE_SIZEALIGN    0x00040000      /* size indicates alignment */
  47. #define IORESOURCE_STARTALIGN   0x00080000      /* start field is alignment */
  48.  
  49. #define IORESOURCE_MEM_64       0x00100000
  50. #define IORESOURCE_WINDOW       0x00200000      /* forwarded by bridge */
  51. #define IORESOURCE_MUXED        0x00400000      /* Resource is software muxed */
  52.  
  53. #define IORESOURCE_EXT_TYPE_BITS 0x01000000     /* Resource extended types */
  54. #define IORESOURCE_SYSRAM       0x01000000      /* System RAM (modifier) */
  55.  
  56. #define IORESOURCE_EXCLUSIVE    0x08000000      /* Userland may not map this resource */
  57.  
  58. #define IORESOURCE_DISABLED     0x10000000
  59. #define IORESOURCE_UNSET        0x20000000      /* No address assigned yet */
  60. #define IORESOURCE_AUTO         0x40000000
  61. #define IORESOURCE_BUSY         0x80000000      /* Driver has marked this resource busy */
  62.  
  63. /* I/O resource extended types */
  64. #define IORESOURCE_SYSTEM_RAM           (IORESOURCE_MEM|IORESOURCE_SYSRAM)
  65.  
  66. /* PnP IRQ specific bits (IORESOURCE_BITS) */
  67. #define IORESOURCE_IRQ_HIGHEDGE         (1<<0)
  68. #define IORESOURCE_IRQ_LOWEDGE          (1<<1)
  69. #define IORESOURCE_IRQ_HIGHLEVEL        (1<<2)
  70. #define IORESOURCE_IRQ_LOWLEVEL         (1<<3)
  71. #define IORESOURCE_IRQ_SHAREABLE        (1<<4)
  72. #define IORESOURCE_IRQ_OPTIONAL         (1<<5)
  73.  
  74. /* PnP DMA specific bits (IORESOURCE_BITS) */
  75. #define IORESOURCE_DMA_TYPE_MASK        (3<<0)
  76. #define IORESOURCE_DMA_8BIT             (0<<0)
  77. #define IORESOURCE_DMA_8AND16BIT        (1<<0)
  78. #define IORESOURCE_DMA_16BIT            (2<<0)
  79.  
  80. #define IORESOURCE_DMA_MASTER           (1<<2)
  81. #define IORESOURCE_DMA_BYTE             (1<<3)
  82. #define IORESOURCE_DMA_WORD             (1<<4)
  83.  
  84. #define IORESOURCE_DMA_SPEED_MASK       (3<<6)
  85. #define IORESOURCE_DMA_COMPATIBLE       (0<<6)
  86. #define IORESOURCE_DMA_TYPEA            (1<<6)
  87. #define IORESOURCE_DMA_TYPEB            (2<<6)
  88. #define IORESOURCE_DMA_TYPEF            (3<<6)
  89.  
  90. /* PnP memory I/O specific bits (IORESOURCE_BITS) */
  91. #define IORESOURCE_MEM_WRITEABLE        (1<<0)  /* dup: IORESOURCE_READONLY */
  92. #define IORESOURCE_MEM_CACHEABLE        (1<<1)  /* dup: IORESOURCE_CACHEABLE */
  93. #define IORESOURCE_MEM_RANGELENGTH      (1<<2)  /* dup: IORESOURCE_RANGELENGTH */
  94. #define IORESOURCE_MEM_TYPE_MASK        (3<<3)
  95. #define IORESOURCE_MEM_8BIT             (0<<3)
  96. #define IORESOURCE_MEM_16BIT            (1<<3)
  97. #define IORESOURCE_MEM_8AND16BIT        (2<<3)
  98. #define IORESOURCE_MEM_32BIT            (3<<3)
  99. #define IORESOURCE_MEM_SHADOWABLE       (1<<5)  /* dup: IORESOURCE_SHADOWABLE */
  100. #define IORESOURCE_MEM_EXPANSIONROM     (1<<6)
  101.  
  102. /* PnP I/O specific bits (IORESOURCE_BITS) */
  103. #define IORESOURCE_IO_16BIT_ADDR        (1<<0)
  104. #define IORESOURCE_IO_FIXED             (1<<1)
  105. #define IORESOURCE_IO_SPARSE            (1<<2)
  106.  
  107. /* PCI ROM control bits (IORESOURCE_BITS) */
  108. #define IORESOURCE_ROM_ENABLE           (1<<0)  /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
  109. #define IORESOURCE_ROM_SHADOW           (1<<1)  /* Use RAM image, not ROM BAR */
  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.  * I/O Resource Descriptors
  116.  *
  117.  * Descriptors are used by walk_iomem_res_desc() and region_intersects()
  118.  * for searching a specific resource range in the iomem table.  Assign
  119.  * a new descriptor when a resource range supports the search interfaces.
  120.  * Otherwise, resource.desc must be set to IORES_DESC_NONE (0).
  121.  */
  122. enum {
  123.         IORES_DESC_NONE                         = 0,
  124.         IORES_DESC_CRASH_KERNEL                 = 1,
  125.         IORES_DESC_ACPI_TABLES                  = 2,
  126.         IORES_DESC_ACPI_NV_STORAGE              = 3,
  127.         IORES_DESC_PERSISTENT_MEMORY            = 4,
  128.         IORES_DESC_PERSISTENT_MEMORY_LEGACY     = 5,
  129. };
  130.  
  131. /* helpers to define resources */
  132. #define DEFINE_RES_NAMED(_start, _size, _name, _flags)                  \
  133.         {                                                               \
  134.                 .start = (_start),                                      \
  135.                 .end = (_start) + (_size) - 1,                          \
  136.                 .name = (_name),                                        \
  137.                 .flags = (_flags),                                      \
  138.                 .desc = IORES_DESC_NONE,                                \
  139.         }
  140.  
  141. #define DEFINE_RES_IO_NAMED(_start, _size, _name)                       \
  142.         DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_IO)
  143. #define DEFINE_RES_IO(_start, _size)                                    \
  144.         DEFINE_RES_IO_NAMED((_start), (_size), NULL)
  145.  
  146. #define DEFINE_RES_MEM_NAMED(_start, _size, _name)                      \
  147.         DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_MEM)
  148. #define DEFINE_RES_MEM(_start, _size)                                   \
  149.         DEFINE_RES_MEM_NAMED((_start), (_size), NULL)
  150.  
  151. #define DEFINE_RES_IRQ_NAMED(_irq, _name)                               \
  152.         DEFINE_RES_NAMED((_irq), 1, (_name), IORESOURCE_IRQ)
  153. #define DEFINE_RES_IRQ(_irq)                                            \
  154.         DEFINE_RES_IRQ_NAMED((_irq), NULL)
  155.  
  156. #define DEFINE_RES_DMA_NAMED(_dma, _name)                               \
  157.         DEFINE_RES_NAMED((_dma), 1, (_name), IORESOURCE_DMA)
  158. #define DEFINE_RES_DMA(_dma)                                            \
  159.         DEFINE_RES_DMA_NAMED((_dma), NULL)
  160.  
  161. /* PC/ISA/whatever - the normal PC address spaces: IO and memory */
  162. extern struct resource ioport_resource;
  163. extern struct resource iomem_resource;
  164.  
  165. extern struct resource *request_resource_conflict(struct resource *root, struct resource *new);
  166. extern int request_resource(struct resource *root, struct resource *new);
  167. extern int release_resource(struct resource *new);
  168. void release_child_resources(struct resource *new);
  169. extern void reserve_region_with_split(struct resource *root,
  170.                              resource_size_t start, resource_size_t end,
  171.                              const char *name);
  172. extern struct resource *insert_resource_conflict(struct resource *parent, struct resource *new);
  173. extern int insert_resource(struct resource *parent, struct resource *new);
  174. extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new);
  175. extern int remove_resource(struct resource *old);
  176. extern void arch_remove_reservations(struct resource *avail);
  177. extern int allocate_resource(struct resource *root, struct resource *new,
  178.                              resource_size_t size, resource_size_t min,
  179.                              resource_size_t max, resource_size_t align,
  180.                              resource_size_t (*alignf)(void *,
  181.                                                        const struct resource *,
  182.                                                        resource_size_t,
  183.                                                        resource_size_t),
  184.                              void *alignf_data);
  185. struct resource *lookup_resource(struct resource *root, resource_size_t start);
  186. int adjust_resource(struct resource *res, resource_size_t start,
  187.                     resource_size_t size);
  188. resource_size_t resource_alignment(struct resource *res);
  189. static inline resource_size_t resource_size(const struct resource *res)
  190. {
  191.         return res->end - res->start + 1;
  192. }
  193. static inline unsigned long resource_type(const struct resource *res)
  194. {
  195.         return res->flags & IORESOURCE_TYPE_BITS;
  196. }
  197. static inline unsigned long resource_ext_type(const struct resource *res)
  198. {
  199.         return res->flags & IORESOURCE_EXT_TYPE_BITS;
  200. }
  201. /* True iff r1 completely contains r2 */
  202. static inline bool resource_contains(struct resource *r1, struct resource *r2)
  203. {
  204.         if (resource_type(r1) != resource_type(r2))
  205.                 return false;
  206.         if (r1->flags & IORESOURCE_UNSET || r2->flags & IORESOURCE_UNSET)
  207.                 return false;
  208.         return r1->start <= r2->start && r1->end >= r2->end;
  209. }
  210.  
  211.  
  212. /* Convenience shorthand with allocation */
  213. #define request_region(start,n,name)            __request_region(&ioport_resource, (start), (n), (name), 0)
  214. #define request_muxed_region(start,n,name)      __request_region(&ioport_resource, (start), (n), (name), IORESOURCE_MUXED)
  215. #define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl)
  216. #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0)
  217. #define request_mem_region_exclusive(start,n,name) \
  218.         __request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE)
  219. #define rename_region(region, newname) do { (region)->name = (newname); } while (0)
  220. #endif /* __ASSEMBLY__ */
  221. #endif  /* _LINUX_IOPORT_H */
  222.