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 #include <linux/types.h> 13 /* 14 * Resources are tree-like, allowing 15 * nesting etc.. 16 */ 17 struct resource { 18 resource_size_t start; 19 resource_size_t end; 20 const char *name; 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 #define IORESOURCE_IRQ_SHAREABLE (1<<4) 59 60 /* ISA PnP DMA specific bits (IORESOURCE_BITS) */ 61 #define IORESOURCE_DMA_TYPE_MASK (3<<0) 62 #define IORESOURCE_DMA_8BIT (0<<0) 63 #define IORESOURCE_DMA_8AND16BIT (1<<0) 64 #define IORESOURCE_DMA_16BIT (2<<0) 65 66 #define IORESOURCE_DMA_MASTER (1<<2) 67 #define IORESOURCE_DMA_BYTE (1<<3) 68 #define IORESOURCE_DMA_WORD (1<<4) 69 70 #define IORESOURCE_DMA_SPEED_MASK (3<<6) 71 #define IORESOURCE_DMA_COMPATIBLE (0<<6) 72 #define IORESOURCE_DMA_TYPEA (1<<6) 73 #define IORESOURCE_DMA_TYPEB (2<<6) 74 #define IORESOURCE_DMA_TYPEF (3<<6) 75 76 /* ISA PnP memory I/O specific bits (IORESOURCE_BITS) */ 77 #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */ 78 #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */ 79 #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */ 80 #define IORESOURCE_MEM_TYPE_MASK (3<<3) 81 #define IORESOURCE_MEM_8BIT (0<<3) 82 #define IORESOURCE_MEM_16BIT (1<<3) 83 #define IORESOURCE_MEM_8AND16BIT (2<<3) 84 #define IORESOURCE_MEM_32BIT (3<<3) 85 #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */ 86 #define IORESOURCE_MEM_EXPANSIONROM (1<<6) 87 88 /* PCI ROM control bits (IORESOURCE_BITS) */ 89 #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */ 90 #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */ 91 #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */ 92 #define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */ 93 94 /* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */ 95 #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */ 96 97 /* PC/ISA/whatever - the normal PC address spaces: IO and memory */ 98 extern struct resource ioport_resource; 99 extern struct resource iomem_resource; 100 101 extern int request_resource(struct resource *root, struct resource *new); 102 extern int release_resource(struct resource *new); 103 extern int insert_resource(struct resource *parent, struct resource *new); 104 extern int allocate_resource(struct resource *root, struct resource *new, 105 resource_size_t size, resource_size_t min, 106 resource_size_t max, resource_size_t align, 107 void (*alignf)(void *, struct resource *, 108 resource_size_t, resource_size_t), 109 void *alignf_data); 110 int adjust_resource(struct resource *res, resource_size_t start, 111 resource_size_t size); 112 113 /* get registered SYSTEM_RAM resources in specified area */ 114 extern int find_next_system_ram(struct resource *res); 115 116 /* Convenience shorthand with allocation */ 117 #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name)) 118 #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name)) 119 #define rename_region(region, newname) do { (region)->name = (newname); } while (0) 120 121 extern struct resource * __request_region(struct resource *, 122 resource_size_t start, 123 resource_size_t n, const char *name); 124 125 /* Compatibility cruft */ 126 #define release_region(start,n) __release_region(&ioport_resource, (start), (n)) 127 #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n)) 128 #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n)) 129 130 extern int __check_region(struct resource *, resource_size_t, resource_size_t); 131 extern void __release_region(struct resource *, resource_size_t, 132 resource_size_t); 133 134 static inline int __deprecated check_region(resource_size_t s, 135 resource_size_t n) 136 { 137 return __check_region(&ioport_resource, s, n); 138 } 139 140 /* Wrappers for managed devices */ 141 struct device; 142 #define devm_request_region(dev,start,n,name) \ 143 __devm_request_region(dev, &ioport_resource, (start), (n), (name)) 144 #define devm_request_mem_region(dev,start,n,name) \ 145 __devm_request_region(dev, &iomem_resource, (start), (n), (name)) 146 147 extern struct resource * __devm_request_region(struct device *dev, 148 struct resource *parent, resource_size_t start, 149 resource_size_t n, const char *name); 150 151 #define devm_release_region(start,n) \ 152 __devm_release_region(dev, &ioport_resource, (start), (n)) 153 #define devm_release_mem_region(start,n) \ 154 __devm_release_region(dev, &iomem_resource, (start), (n)) 155 156 extern void __devm_release_region(struct device *dev, struct resource *parent, 157 resource_size_t start, resource_size_t n); 158 159 #endif /* _LINUX_IOPORT_H */ 160