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 struct resource *parent, *sibling, *child; 24 }; 25 26 struct resource_list { 27 struct resource_list *next; 28 struct resource *res; 29 struct pci_dev *dev; 30 }; 31 32 /* 33 * IO resources have these defined flags. 34 */ 35 #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */ 36 37 #define IORESOURCE_TYPE_BITS 0x00000f00 /* Resource type */ 38 #define IORESOURCE_IO 0x00000100 39 #define IORESOURCE_MEM 0x00000200 40 #define IORESOURCE_IRQ 0x00000400 41 #define IORESOURCE_DMA 0x00000800 42 43 #define IORESOURCE_PREFETCH 0x00001000 /* No side effects */ 44 #define IORESOURCE_READONLY 0x00002000 45 #define IORESOURCE_CACHEABLE 0x00004000 46 #define IORESOURCE_RANGELENGTH 0x00008000 47 #define IORESOURCE_SHADOWABLE 0x00010000 48 49 #define IORESOURCE_SIZEALIGN 0x00020000 /* size indicates alignment */ 50 #define IORESOURCE_STARTALIGN 0x00040000 /* start field is alignment */ 51 52 #define IORESOURCE_MEM_64 0x00100000 53 54 #define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */ 55 #define IORESOURCE_DISABLED 0x10000000 56 #define IORESOURCE_UNSET 0x20000000 57 #define IORESOURCE_AUTO 0x40000000 58 #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */ 59 60 /* PnP IRQ specific bits (IORESOURCE_BITS) */ 61 #define IORESOURCE_IRQ_HIGHEDGE (1<<0) 62 #define IORESOURCE_IRQ_LOWEDGE (1<<1) 63 #define IORESOURCE_IRQ_HIGHLEVEL (1<<2) 64 #define IORESOURCE_IRQ_LOWLEVEL (1<<3) 65 #define IORESOURCE_IRQ_SHAREABLE (1<<4) 66 #define IORESOURCE_IRQ_OPTIONAL (1<<5) 67 68 /* PnP DMA specific bits (IORESOURCE_BITS) */ 69 #define IORESOURCE_DMA_TYPE_MASK (3<<0) 70 #define IORESOURCE_DMA_8BIT (0<<0) 71 #define IORESOURCE_DMA_8AND16BIT (1<<0) 72 #define IORESOURCE_DMA_16BIT (2<<0) 73 74 #define IORESOURCE_DMA_MASTER (1<<2) 75 #define IORESOURCE_DMA_BYTE (1<<3) 76 #define IORESOURCE_DMA_WORD (1<<4) 77 78 #define IORESOURCE_DMA_SPEED_MASK (3<<6) 79 #define IORESOURCE_DMA_COMPATIBLE (0<<6) 80 #define IORESOURCE_DMA_TYPEA (1<<6) 81 #define IORESOURCE_DMA_TYPEB (2<<6) 82 #define IORESOURCE_DMA_TYPEF (3<<6) 83 84 /* PnP memory I/O specific bits (IORESOURCE_BITS) */ 85 #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */ 86 #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */ 87 #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */ 88 #define IORESOURCE_MEM_TYPE_MASK (3<<3) 89 #define IORESOURCE_MEM_8BIT (0<<3) 90 #define IORESOURCE_MEM_16BIT (1<<3) 91 #define IORESOURCE_MEM_8AND16BIT (2<<3) 92 #define IORESOURCE_MEM_32BIT (3<<3) 93 #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */ 94 #define IORESOURCE_MEM_EXPANSIONROM (1<<6) 95 96 /* PnP I/O specific bits (IORESOURCE_BITS) */ 97 #define IORESOURCE_IO_16BIT_ADDR (1<<0) 98 #define IORESOURCE_IO_FIXED (1<<1) 99 100 /* PCI ROM control bits (IORESOURCE_BITS) */ 101 #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */ 102 #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */ 103 #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */ 104 #define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */ 105 106 /* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */ 107 #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */ 108 109 /* PC/ISA/whatever - the normal PC address spaces: IO and memory */ 110 extern struct resource ioport_resource; 111 extern struct resource iomem_resource; 112 113 extern int request_resource(struct resource *root, struct resource *new); 114 extern int release_resource(struct resource *new); 115 extern void reserve_region_with_split(struct resource *root, 116 resource_size_t start, resource_size_t end, 117 const char *name); 118 extern int insert_resource(struct resource *parent, struct resource *new); 119 extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new); 120 extern int allocate_resource(struct resource *root, struct resource *new, 121 resource_size_t size, resource_size_t min, 122 resource_size_t max, resource_size_t align, 123 void (*alignf)(void *, struct resource *, 124 resource_size_t, resource_size_t), 125 void *alignf_data); 126 int adjust_resource(struct resource *res, resource_size_t start, 127 resource_size_t size); 128 resource_size_t resource_alignment(struct resource *res); 129 static inline resource_size_t resource_size(const struct resource *res) 130 { 131 return res->end - res->start + 1; 132 } 133 static inline unsigned long resource_type(const struct resource *res) 134 { 135 return res->flags & IORESOURCE_TYPE_BITS; 136 } 137 138 /* Convenience shorthand with allocation */ 139 #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0) 140 #define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl) 141 #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0) 142 #define request_mem_region_exclusive(start,n,name) \ 143 __request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE) 144 #define rename_region(region, newname) do { (region)->name = (newname); } while (0) 145 146 extern struct resource * __request_region(struct resource *, 147 resource_size_t start, 148 resource_size_t n, 149 const char *name, int flags); 150 151 /* Compatibility cruft */ 152 #define release_region(start,n) __release_region(&ioport_resource, (start), (n)) 153 #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n)) 154 #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n)) 155 156 extern int __check_region(struct resource *, resource_size_t, resource_size_t); 157 extern void __release_region(struct resource *, resource_size_t, 158 resource_size_t); 159 160 static inline int __deprecated check_region(resource_size_t s, 161 resource_size_t n) 162 { 163 return __check_region(&ioport_resource, s, n); 164 } 165 166 /* Wrappers for managed devices */ 167 struct device; 168 #define devm_request_region(dev,start,n,name) \ 169 __devm_request_region(dev, &ioport_resource, (start), (n), (name)) 170 #define devm_request_mem_region(dev,start,n,name) \ 171 __devm_request_region(dev, &iomem_resource, (start), (n), (name)) 172 173 extern struct resource * __devm_request_region(struct device *dev, 174 struct resource *parent, resource_size_t start, 175 resource_size_t n, const char *name); 176 177 #define devm_release_region(dev, start, n) \ 178 __devm_release_region(dev, &ioport_resource, (start), (n)) 179 #define devm_release_mem_region(dev, start, n) \ 180 __devm_release_region(dev, &iomem_resource, (start), (n)) 181 182 extern void __devm_release_region(struct device *dev, struct resource *parent, 183 resource_size_t start, resource_size_t n); 184 extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size); 185 extern int iomem_is_exclusive(u64 addr); 186 187 extern int 188 walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages, 189 void *arg, int (*func)(unsigned long, unsigned long, void *)); 190 191 #endif /* __ASSEMBLY__ */ 192 #endif /* _LINUX_IOPORT_H */ 193
