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 /* 12 * Resources are tree-like, allowing 13 * nesting etc.. 14 */ 15 struct resource { 16 const char *name; 17 unsigned long start, end; 18 unsigned long flags; 19 struct resource *parent, *sibling, *child; 20 }; 21 22 struct resource_list { 23 struct resource_list *next; 24 struct resource *res; 25 struct pci_dev *dev; 26 }; 27 28 /* 29 * IO resources have these defined flags. 30 */ 31 #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */ 32 33 #define IORESOURCE_IO 0x00000100 /* Resource type */ 34 #define IORESOURCE_MEM 0x00000200 35 #define IORESOURCE_IRQ 0x00000400 36 #define IORESOURCE_DMA 0x00000800 37 38 #define IORESOURCE_PREFETCH 0x00001000 /* No side effects */ 39 #define IORESOURCE_READONLY 0x00002000 40 #define IORESOURCE_CACHEABLE 0x00004000 41 #define IORESOURCE_RANGELENGTH 0x00008000 42 #define IORESOURCE_SHADOWABLE 0x00010000 43 #define IORESOURCE_BUS_HAS_VGA 0x00080000 44 45 #define IORESOURCE_UNSET 0x20000000 46 #define IORESOURCE_AUTO 0x40000000 47 #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */ 48 49 /* ISA PnP IRQ specific bits (IORESOURCE_BITS) */ 50 #define IORESOURCE_IRQ_HIGHEDGE (1<<0) 51 #define IORESOURCE_IRQ_LOWEDGE (1<<1) 52 #define IORESOURCE_IRQ_HIGHLEVEL (1<<2) 53 #define IORESOURCE_IRQ_LOWLEVEL (1<<3) 54 55 /* ISA PnP DMA specific bits (IORESOURCE_BITS) */ 56 #define IORESOURCE_DMA_TYPE_MASK (3<<0) 57 #define IORESOURCE_DMA_8BIT (0<<0) 58 #define IORESOURCE_DMA_8AND16BIT (1<<0) 59 #define IORESOURCE_DMA_16BIT (2<<0) 60 61 #define IORESOURCE_DMA_MASTER (1<<2) 62 #define IORESOURCE_DMA_BYTE (1<<3) 63 #define IORESOURCE_DMA_WORD (1<<4) 64 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 71 /* ISA PnP memory I/O specific bits (IORESOURCE_BITS) */ 72 #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */ 73 #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */ 74 #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */ 75 #define IORESOURCE_MEM_TYPE_MASK (3<<3) 76 #define IORESOURCE_MEM_8BIT (0<<3) 77 #define IORESOURCE_MEM_16BIT (1<<3) 78 #define IORESOURCE_MEM_8AND16BIT (2<<3) 79 #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */ 80 #define IORESOURCE_MEM_EXPANSIONROM (1<<6) 81 82 /* PC/ISA/whatever - the normal PC address spaces: IO and memory */ 83 extern struct resource ioport_resource; 84 extern struct resource iomem_resource; 85 86 extern int check_resource(struct resource *root, unsigned long, unsigned long); 87 extern int request_resource(struct resource *root, struct resource *new); 88 extern int release_resource(struct resource *new); 89 extern int allocate_resource(struct resource *root, struct resource *new, 90 unsigned long size, 91 unsigned long min, unsigned long max, 92 unsigned long align, 93 void (*alignf)(void *, struct resource *, 94 unsigned long, unsigned long), 95 void *alignf_data); 96 97 /* Convenience shorthand with allocation */ 98 #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name)) 99 #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name)) 100 101 extern struct resource * __request_region(struct resource *, unsigned long start, unsigned long n, const char *name); 102 103 /* Compatibility cruft */ 104 #define check_region(start,n) __check_region(&ioport_resource, (start), (n)) 105 #define release_region(start,n) __release_region(&ioport_resource, (start), (n)) 106 #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n)) 107 #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n)) 108 109 extern int __check_region(struct resource *, unsigned long, unsigned long); 110 extern void __release_region(struct resource *, unsigned long, unsigned long); 111 112 #define HAVE_AUTOIRQ 113 extern void autoirq_setup(int waittime); 114 extern int autoirq_report(int waittime); 115 116 #endif /* _LINUX_IOPORT_H */ 117