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> 12 /* 13 * Resources are tree-like, allowing 14 * nesting etc.. 15 */ 16 struct resource { 17 const char *name; 18 unsigned long start, end; 19 unsigned long flags; 20 struct resource *parent, *sibling, *child; 21 }; 22 23 struct resource_list { 24 struct resource_list *next; 25 struct resource *res; 26 struct pci_dev *dev; 27 }; 28 29 /* 30 * IO resources have these defined flags. 31 */ 32 #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */ 33 34 #define IORESOURCE_IO 0x00000100 /* Resource type */ 35 #define IORESOURCE_MEM 0x00000200 36 #define IORESOURCE_IRQ 0x00000400 37 #define IORESOURCE_DMA 0x00000800 38 39 #define IORESOURCE_PREFETCH 0x00001000 /* No side effects */ 40 #define IORESOURCE_READONLY 0x00002000 41 #define IORESOURCE_CACHEABLE 0x00004000 42 #define IORESOURCE_RANGELENGTH 0x00008000 43 #define IORESOURCE_SHADOWABLE 0x00010000 44 #define IORESOURCE_BUS_HAS_VGA 0x00080000 45 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 51 /* ISA PnP IRQ specific bits (IORESOURCE_BITS) */ 52 #define IORESOURCE_IRQ_HIGHEDGE (1<<0) 53 #define IORESOURCE_IRQ_LOWEDGE (1<<1) 54 #define IORESOURCE_IRQ_HIGHLEVEL (1<<2) 55 #define IORESOURCE_IRQ_LOWLEVEL (1<<3) 56 57 /* ISA 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 63 #define IORESOURCE_DMA_MASTER (1<<2) 64 #define IORESOURCE_DMA_BYTE (1<<3) 65 #define IORESOURCE_DMA_WORD (1<<4) 66 67 #define IORESOURCE_DMA_SPEED_MASK (3<<6) 68 #define IORESOURCE_DMA_COMPATIBLE (0<<6) 69 #define IORESOURCE_DMA_TYPEA (1<<6) 70 #define IORESOURCE_DMA_TYPEB (2<<6) 71 #define IORESOURCE_DMA_TYPEF (3<<6) 72 73 /* ISA PnP memory I/O specific bits (IORESOURCE_BITS) */ 74 #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */ 75 #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */ 76 #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */ 77 #define IORESOURCE_MEM_TYPE_MASK (3<<3) 78 #define IORESOURCE_MEM_8BIT (0<<3) 79 #define IORESOURCE_MEM_16BIT (1<<3) 80 #define IORESOURCE_MEM_8AND16BIT (2<<3) 81 #define IORESOURCE_MEM_32BIT (3<<3) 82 #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */ 83 #define IORESOURCE_MEM_EXPANSIONROM (1<<6) 84 85 /* PCI ROM control bits (IORESOURCE_BITS) */ 86 #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */ 87 #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */ 88 #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */ 89 90 /* PC/ISA/whatever - the normal PC address spaces: IO and memory */ 91 extern struct resource ioport_resource; 92 extern struct resource iomem_resource; 93 94 extern int request_resource(struct resource *root, struct resource *new); 95 extern struct resource * ____request_resource(struct resource *root, struct resource *new); 96 extern int release_resource(struct resource *new); 97 extern __deprecated_for_modules int insert_resource(struct resource *parent, struct resource *new); 98 extern int allocate_resource(struct resource *root, struct resource *new, 99 unsigned long size, 100 unsigned long min, unsigned long max, 101 unsigned long align, 102 void (*alignf)(void *, struct resource *, 103 unsigned long, unsigned long), 104 void *alignf_data); 105 int adjust_resource(struct resource *res, unsigned long start, 106 unsigned long size); 107 108 /* Convenience shorthand with allocation */ 109 #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name)) 110 #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name)) 111 #define rename_region(region, newname) do { (region)->name = (newname); } while (0) 112 113 extern struct resource * __request_region(struct resource *, unsigned long start, unsigned long n, const char *name); 114 115 /* Compatibility cruft */ 116 #define release_region(start,n) __release_region(&ioport_resource, (start), (n)) 117 #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n)) 118 #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n)) 119 120 extern int __check_region(struct resource *, unsigned long, unsigned long); 121 extern void __release_region(struct resource *, unsigned long, unsigned long); 122 123 static inline int __deprecated check_region(unsigned long s, unsigned long n) 124 { 125 return __check_region(&ioport_resource, s, n); 126 } 127 #endif /* _LINUX_IOPORT_H */ 128