Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Greg Kroah-Hartman | cf7c712 | 2006-06-12 15:49:31 -0700 | [diff] [blame] | 12 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | /* |
| 14 | * Resources are tree-like, allowing |
| 15 | * nesting etc.. |
| 16 | */ |
| 17 | struct resource { |
Greg Kroah-Hartman | cf7c712 | 2006-06-12 15:49:31 -0700 | [diff] [blame] | 18 | resource_size_t start; |
| 19 | resource_size_t end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | const char *name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | unsigned long flags; |
| 22 | struct resource *parent, *sibling, *child; |
| 23 | }; |
| 24 | |
| 25 | struct resource_list { |
| 26 | struct resource_list *next; |
| 27 | struct resource *res; |
| 28 | struct pci_dev *dev; |
| 29 | }; |
| 30 | |
| 31 | /* |
| 32 | * IO resources have these defined flags. |
| 33 | */ |
| 34 | #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */ |
| 35 | |
| 36 | #define IORESOURCE_IO 0x00000100 /* Resource type */ |
| 37 | #define IORESOURCE_MEM 0x00000200 |
| 38 | #define IORESOURCE_IRQ 0x00000400 |
| 39 | #define IORESOURCE_DMA 0x00000800 |
| 40 | |
| 41 | #define IORESOURCE_PREFETCH 0x00001000 /* No side effects */ |
| 42 | #define IORESOURCE_READONLY 0x00002000 |
| 43 | #define IORESOURCE_CACHEABLE 0x00004000 |
| 44 | #define IORESOURCE_RANGELENGTH 0x00008000 |
| 45 | #define IORESOURCE_SHADOWABLE 0x00010000 |
| 46 | #define IORESOURCE_BUS_HAS_VGA 0x00080000 |
| 47 | |
| 48 | #define IORESOURCE_DISABLED 0x10000000 |
| 49 | #define IORESOURCE_UNSET 0x20000000 |
| 50 | #define IORESOURCE_AUTO 0x40000000 |
| 51 | #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */ |
| 52 | |
| 53 | /* ISA PnP IRQ specific bits (IORESOURCE_BITS) */ |
| 54 | #define IORESOURCE_IRQ_HIGHEDGE (1<<0) |
| 55 | #define IORESOURCE_IRQ_LOWEDGE (1<<1) |
| 56 | #define IORESOURCE_IRQ_HIGHLEVEL (1<<2) |
| 57 | #define IORESOURCE_IRQ_LOWLEVEL (1<<3) |
| 58 | |
| 59 | /* ISA PnP DMA specific bits (IORESOURCE_BITS) */ |
| 60 | #define IORESOURCE_DMA_TYPE_MASK (3<<0) |
| 61 | #define IORESOURCE_DMA_8BIT (0<<0) |
| 62 | #define IORESOURCE_DMA_8AND16BIT (1<<0) |
| 63 | #define IORESOURCE_DMA_16BIT (2<<0) |
| 64 | |
| 65 | #define IORESOURCE_DMA_MASTER (1<<2) |
| 66 | #define IORESOURCE_DMA_BYTE (1<<3) |
| 67 | #define IORESOURCE_DMA_WORD (1<<4) |
| 68 | |
| 69 | #define IORESOURCE_DMA_SPEED_MASK (3<<6) |
| 70 | #define IORESOURCE_DMA_COMPATIBLE (0<<6) |
| 71 | #define IORESOURCE_DMA_TYPEA (1<<6) |
| 72 | #define IORESOURCE_DMA_TYPEB (2<<6) |
| 73 | #define IORESOURCE_DMA_TYPEF (3<<6) |
| 74 | |
| 75 | /* ISA PnP memory I/O specific bits (IORESOURCE_BITS) */ |
| 76 | #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */ |
| 77 | #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */ |
| 78 | #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */ |
| 79 | #define IORESOURCE_MEM_TYPE_MASK (3<<3) |
| 80 | #define IORESOURCE_MEM_8BIT (0<<3) |
| 81 | #define IORESOURCE_MEM_16BIT (1<<3) |
| 82 | #define IORESOURCE_MEM_8AND16BIT (2<<3) |
| 83 | #define IORESOURCE_MEM_32BIT (3<<3) |
| 84 | #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */ |
| 85 | #define IORESOURCE_MEM_EXPANSIONROM (1<<6) |
| 86 | |
| 87 | /* PCI ROM control bits (IORESOURCE_BITS) */ |
| 88 | #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */ |
| 89 | #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */ |
| 90 | #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */ |
| 91 | |
| 92 | /* PC/ISA/whatever - the normal PC address spaces: IO and memory */ |
| 93 | extern struct resource ioport_resource; |
| 94 | extern struct resource iomem_resource; |
| 95 | |
| 96 | extern int request_resource(struct resource *root, struct resource *new); |
| 97 | extern struct resource * ____request_resource(struct resource *root, struct resource *new); |
| 98 | extern int release_resource(struct resource *new); |
Adrian Bunk | 24622ef | 2005-11-07 01:01:44 -0800 | [diff] [blame] | 99 | extern __deprecated_for_modules int insert_resource(struct resource *parent, struct resource *new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | extern int allocate_resource(struct resource *root, struct resource *new, |
Greg Kroah-Hartman | d75fc8b | 2006-06-12 16:09:23 -0700 | [diff] [blame] | 101 | resource_size_t size, resource_size_t min, |
| 102 | resource_size_t max, resource_size_t align, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | void (*alignf)(void *, struct resource *, |
Greg Kroah-Hartman | d75fc8b | 2006-06-12 16:09:23 -0700 | [diff] [blame] | 104 | resource_size_t, resource_size_t), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | void *alignf_data); |
Greg Kroah-Hartman | d75fc8b | 2006-06-12 16:09:23 -0700 | [diff] [blame] | 106 | int adjust_resource(struct resource *res, resource_size_t start, |
| 107 | resource_size_t size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | |
KAMEZAWA Hiroyuki | 2842f11 | 2006-06-27 02:53:36 -0700 | [diff] [blame] | 109 | /* get registered SYSTEM_RAM resources in specified area */ |
| 110 | extern int find_next_system_ram(struct resource *res); |
| 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | /* Convenience shorthand with allocation */ |
| 113 | #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name)) |
| 114 | #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name)) |
| 115 | #define rename_region(region, newname) do { (region)->name = (newname); } while (0) |
| 116 | |
Greg Kroah-Hartman | d75fc8b | 2006-06-12 16:09:23 -0700 | [diff] [blame] | 117 | extern struct resource * __request_region(struct resource *, |
| 118 | resource_size_t start, |
| 119 | resource_size_t n, const char *name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | |
| 121 | /* Compatibility cruft */ |
| 122 | #define release_region(start,n) __release_region(&ioport_resource, (start), (n)) |
| 123 | #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n)) |
| 124 | #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n)) |
| 125 | |
Greg Kroah-Hartman | d75fc8b | 2006-06-12 16:09:23 -0700 | [diff] [blame] | 126 | extern int __check_region(struct resource *, resource_size_t, resource_size_t); |
| 127 | extern void __release_region(struct resource *, resource_size_t, |
| 128 | resource_size_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
Greg Kroah-Hartman | d75fc8b | 2006-06-12 16:09:23 -0700 | [diff] [blame] | 130 | static inline int __deprecated check_region(resource_size_t s, |
| 131 | resource_size_t n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | { |
| 133 | return __check_region(&ioport_resource, s, n); |
| 134 | } |
| 135 | #endif /* _LINUX_IOPORT_H */ |