Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Russell King | 4baa992 | 2008-08-02 10:55:55 +0100 | [diff] [blame] | 2 | * arch/arm/include/asm/io.h |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 1996-2000 Russell King |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | * Modifications: |
| 11 | * 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both |
| 12 | * constant addresses and variable addresses. |
| 13 | * 04-Dec-1997 RMK Moved a lot of this stuff to the new architecture |
| 14 | * specific IO header files. |
| 15 | * 27-Mar-1999 PJB Second parameter of memcpy_toio is const.. |
| 16 | * 04-Apr-1999 PJB Added check_signature. |
| 17 | * 12-Dec-1999 RMK More cleanups |
| 18 | * 18-Jun-2000 RMK Removed virt_to_* and friends definitions |
| 19 | * 05-Oct-2004 BJD Moved memory string functions to use void __iomem |
| 20 | */ |
| 21 | #ifndef __ASM_ARM_IO_H |
| 22 | #define __ASM_ARM_IO_H |
| 23 | |
| 24 | #ifdef __KERNEL__ |
| 25 | |
| 26 | #include <linux/types.h> |
| 27 | #include <asm/byteorder.h> |
| 28 | #include <asm/memory.h> |
Catalin Marinas | 79f64db | 2010-07-28 22:01:55 +0100 | [diff] [blame] | 29 | #include <asm/system.h> |
Michael S. Tsirkin | e5bfb72 | 2011-11-24 20:57:23 +0200 | [diff] [blame] | 30 | #include <asm-generic/pci_iomap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
| 32 | /* |
| 33 | * ISA I/O bus memory addresses are 1:1 with the physical address. |
| 34 | */ |
| 35 | #define isa_virt_to_bus virt_to_phys |
| 36 | #define isa_page_to_bus page_to_phys |
| 37 | #define isa_bus_to_virt phys_to_virt |
| 38 | |
| 39 | /* |
| 40 | * Generic IO read/write. These perform native-endian accesses. Note |
| 41 | * that some architectures will want to re-define __raw_{read,write}w. |
| 42 | */ |
| 43 | extern void __raw_writesb(void __iomem *addr, const void *data, int bytelen); |
| 44 | extern void __raw_writesw(void __iomem *addr, const void *data, int wordlen); |
| 45 | extern void __raw_writesl(void __iomem *addr, const void *data, int longlen); |
| 46 | |
Deepak Saxena | a0d95af | 2005-12-05 10:54:59 +0000 | [diff] [blame] | 47 | extern void __raw_readsb(const void __iomem *addr, void *data, int bytelen); |
| 48 | extern void __raw_readsw(const void __iomem *addr, void *data, int wordlen); |
| 49 | extern void __raw_readsl(const void __iomem *addr, void *data, int longlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
| 51 | #define __raw_writeb(v,a) (__chk_io_ptr(a), *(volatile unsigned char __force *)(a) = (v)) |
| 52 | #define __raw_writew(v,a) (__chk_io_ptr(a), *(volatile unsigned short __force *)(a) = (v)) |
| 53 | #define __raw_writel(v,a) (__chk_io_ptr(a), *(volatile unsigned int __force *)(a) = (v)) |
| 54 | |
| 55 | #define __raw_readb(a) (__chk_io_ptr(a), *(volatile unsigned char __force *)(a)) |
| 56 | #define __raw_readw(a) (__chk_io_ptr(a), *(volatile unsigned short __force *)(a)) |
| 57 | #define __raw_readl(a) (__chk_io_ptr(a), *(volatile unsigned int __force *)(a)) |
| 58 | |
| 59 | /* |
Russell King | 67a1901 | 2005-11-17 16:48:00 +0000 | [diff] [blame] | 60 | * Architecture ioremap implementation. |
| 61 | */ |
Russell King | 3603ab2 | 2007-05-05 20:59:27 +0100 | [diff] [blame] | 62 | #define MT_DEVICE 0 |
| 63 | #define MT_DEVICE_NONSHARED 1 |
| 64 | #define MT_DEVICE_CACHED 2 |
Russell King | db5b716 | 2008-09-07 12:42:51 +0100 | [diff] [blame] | 65 | #define MT_DEVICE_WC 3 |
Russell King | 3603ab2 | 2007-05-05 20:59:27 +0100 | [diff] [blame] | 66 | /* |
Russell King | db5b716 | 2008-09-07 12:42:51 +0100 | [diff] [blame] | 67 | * types 4 onwards can be found in asm/mach/map.h and are undefined |
Russell King | 3603ab2 | 2007-05-05 20:59:27 +0100 | [diff] [blame] | 68 | * for ioremap |
| 69 | */ |
| 70 | |
| 71 | /* |
| 72 | * __arm_ioremap takes CPU physical address. |
| 73 | * __arm_ioremap_pfn takes a Page Frame Number and an offset into that page |
Russell King | 31aa8fd | 2009-12-18 11:10:03 +0000 | [diff] [blame] | 74 | * The _caller variety takes a __builtin_return_address(0) value for |
| 75 | * /proc/vmalloc to use - and should only be used in non-inline functions. |
Russell King | 3603ab2 | 2007-05-05 20:59:27 +0100 | [diff] [blame] | 76 | */ |
Russell King | 31aa8fd | 2009-12-18 11:10:03 +0000 | [diff] [blame] | 77 | extern void __iomem *__arm_ioremap_pfn_caller(unsigned long, unsigned long, |
| 78 | size_t, unsigned int, void *); |
| 79 | extern void __iomem *__arm_ioremap_caller(unsigned long, size_t, unsigned int, |
| 80 | void *); |
| 81 | |
| 82 | extern void __iomem *__arm_ioremap_pfn(unsigned long, unsigned long, size_t, unsigned int); |
| 83 | extern void __iomem *__arm_ioremap(unsigned long, size_t, unsigned int); |
Tony Lindgren | 6c5482d | 2011-10-12 01:02:50 +0100 | [diff] [blame] | 84 | extern void __iomem *__arm_ioremap_exec(unsigned long, size_t, bool cached); |
Al Viro | 1622605 | 2006-10-09 02:09:49 +0100 | [diff] [blame] | 85 | extern void __iounmap(volatile void __iomem *addr); |
Russell King | 67a1901 | 2005-11-17 16:48:00 +0000 | [diff] [blame] | 86 | |
| 87 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | * Bad read/write accesses... |
| 89 | */ |
| 90 | extern void __readwrite_bug(const char *fn); |
| 91 | |
| 92 | /* |
Russell King | 0560cf5 | 2008-11-30 11:45:54 +0000 | [diff] [blame] | 93 | * A typesafe __io() helper |
| 94 | */ |
| 95 | static inline void __iomem *__typesafe_io(unsigned long addr) |
| 96 | { |
| 97 | return (void __iomem *)addr; |
| 98 | } |
| 99 | |
Russell King | c192802 | 2011-01-30 11:29:40 +0000 | [diff] [blame] | 100 | /* IO barriers */ |
| 101 | #ifdef CONFIG_ARM_DMA_MEM_BUFFERABLE |
| 102 | #define __iormb() rmb() |
| 103 | #define __iowmb() wmb() |
| 104 | #else |
| 105 | #define __iormb() do { } while (0) |
| 106 | #define __iowmb() do { } while (0) |
| 107 | #endif |
| 108 | |
Russell King | 0560cf5 | 2008-11-30 11:45:54 +0000 | [diff] [blame] | 109 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | * Now, pick up the machine-defined IO definitions |
| 111 | */ |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 112 | #include <mach/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | /* |
Russell King | 04e1c83 | 2011-07-06 12:49:59 +0100 | [diff] [blame] | 115 | * This is the limit of PC card/PCI/ISA IO space, which is by default |
| 116 | * 64K if we have PC card, PCI or ISA support. Otherwise, default to |
| 117 | * zero to prevent ISA/PCI drivers claiming IO space (and potentially |
| 118 | * oopsing.) |
| 119 | * |
| 120 | * Only set this larger if you really need inb() et.al. to operate over |
| 121 | * a larger address space. Note that SOC_COMMON ioremaps each sockets |
| 122 | * IO space area, and so inb() et.al. must be defined to operate as per |
| 123 | * readb() et.al. on such platforms. |
| 124 | */ |
| 125 | #ifndef IO_SPACE_LIMIT |
| 126 | #if defined(CONFIG_PCMCIA_SOC_COMMON) || defined(CONFIG_PCMCIA_SOC_COMMON_MODULE) |
| 127 | #define IO_SPACE_LIMIT ((resource_size_t)0xffffffff) |
| 128 | #elif defined(CONFIG_PCI) || defined(CONFIG_ISA) || defined(CONFIG_PCCARD) |
| 129 | #define IO_SPACE_LIMIT ((resource_size_t)0xffff) |
| 130 | #else |
| 131 | #define IO_SPACE_LIMIT ((resource_size_t)0) |
| 132 | #endif |
| 133 | #endif |
| 134 | |
| 135 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | * IO port access primitives |
| 137 | * ------------------------- |
| 138 | * |
| 139 | * The ARM doesn't have special IO access instructions; all IO is memory |
| 140 | * mapped. Note that these are defined to perform little endian accesses |
| 141 | * only. Their primary purpose is to access PCI and ISA peripherals. |
| 142 | * |
| 143 | * Note that for a big endian machine, this implies that the following |
Russell King | c79ebfa | 2005-06-27 14:23:38 +0100 | [diff] [blame] | 144 | * big endian mode connectivity is in place, as described by numerous |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | * ARM documents: |
| 146 | * |
| 147 | * PCI: D0-D7 D8-D15 D16-D23 D24-D31 |
| 148 | * ARM: D24-D31 D16-D23 D8-D15 D0-D7 |
| 149 | * |
| 150 | * The machine specific io.h include defines __io to translate an "IO" |
| 151 | * address to a memory address. |
| 152 | * |
| 153 | * Note that we prevent GCC re-ordering or caching values in expressions |
| 154 | * by introducing sequence points into the in*() definitions. Note that |
| 155 | * __raw_* do not guarantee this behaviour. |
| 156 | * |
| 157 | * The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space. |
| 158 | */ |
| 159 | #ifdef __io |
Russell King | c192802 | 2011-01-30 11:29:40 +0000 | [diff] [blame] | 160 | #define outb(v,p) ({ __iowmb(); __raw_writeb(v,__io(p)); }) |
| 161 | #define outw(v,p) ({ __iowmb(); __raw_writew((__force __u16) \ |
| 162 | cpu_to_le16(v),__io(p)); }) |
| 163 | #define outl(v,p) ({ __iowmb(); __raw_writel((__force __u32) \ |
| 164 | cpu_to_le32(v),__io(p)); }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
Russell King | c192802 | 2011-01-30 11:29:40 +0000 | [diff] [blame] | 166 | #define inb(p) ({ __u8 __v = __raw_readb(__io(p)); __iormb(); __v; }) |
Olav Kongas | 05f9869 | 2005-04-29 22:08:34 +0100 | [diff] [blame] | 167 | #define inw(p) ({ __u16 __v = le16_to_cpu((__force __le16) \ |
Russell King | c192802 | 2011-01-30 11:29:40 +0000 | [diff] [blame] | 168 | __raw_readw(__io(p))); __iormb(); __v; }) |
Olav Kongas | 05f9869 | 2005-04-29 22:08:34 +0100 | [diff] [blame] | 169 | #define inl(p) ({ __u32 __v = le32_to_cpu((__force __le32) \ |
Russell King | c192802 | 2011-01-30 11:29:40 +0000 | [diff] [blame] | 170 | __raw_readl(__io(p))); __iormb(); __v; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | |
| 172 | #define outsb(p,d,l) __raw_writesb(__io(p),d,l) |
| 173 | #define outsw(p,d,l) __raw_writesw(__io(p),d,l) |
| 174 | #define outsl(p,d,l) __raw_writesl(__io(p),d,l) |
| 175 | |
| 176 | #define insb(p,d,l) __raw_readsb(__io(p),d,l) |
| 177 | #define insw(p,d,l) __raw_readsw(__io(p),d,l) |
| 178 | #define insl(p,d,l) __raw_readsl(__io(p),d,l) |
| 179 | #endif |
| 180 | |
| 181 | #define outb_p(val,port) outb((val),(port)) |
| 182 | #define outw_p(val,port) outw((val),(port)) |
| 183 | #define outl_p(val,port) outl((val),(port)) |
| 184 | #define inb_p(port) inb((port)) |
| 185 | #define inw_p(port) inw((port)) |
| 186 | #define inl_p(port) inl((port)) |
| 187 | |
| 188 | #define outsb_p(port,from,len) outsb(port,from,len) |
| 189 | #define outsw_p(port,from,len) outsw(port,from,len) |
| 190 | #define outsl_p(port,from,len) outsl(port,from,len) |
| 191 | #define insb_p(port,to,len) insb(port,to,len) |
| 192 | #define insw_p(port,to,len) insw(port,to,len) |
| 193 | #define insl_p(port,to,len) insl(port,to,len) |
| 194 | |
| 195 | /* |
| 196 | * String version of IO memory access ops: |
| 197 | */ |
Russell King | d2f6074 | 2005-09-24 10:42:06 +0100 | [diff] [blame] | 198 | extern void _memcpy_fromio(void *, const volatile void __iomem *, size_t); |
| 199 | extern void _memcpy_toio(volatile void __iomem *, const void *, size_t); |
| 200 | extern void _memset_io(volatile void __iomem *, int, size_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | |
| 202 | #define mmiowb() |
| 203 | |
| 204 | /* |
| 205 | * Memory access primitives |
| 206 | * ------------------------ |
| 207 | * |
| 208 | * These perform PCI memory accesses via an ioremap region. They don't |
| 209 | * take an address as such, but a cookie. |
| 210 | * |
| 211 | * Again, this are defined to perform little endian accesses. See the |
| 212 | * IO port primitives for more information. |
| 213 | */ |
| 214 | #ifdef __mem_pci |
Olof Johansson | b0c1264 | 2011-10-04 03:44:07 +0100 | [diff] [blame] | 215 | #define readb_relaxed(c) ({ u8 __r = __raw_readb(__mem_pci(c)); __r; }) |
| 216 | #define readw_relaxed(c) ({ u16 __r = le16_to_cpu((__force __le16) \ |
| 217 | __raw_readw(__mem_pci(c))); __r; }) |
| 218 | #define readl_relaxed(c) ({ u32 __r = le32_to_cpu((__force __le32) \ |
| 219 | __raw_readl(__mem_pci(c))); __r; }) |
Catalin Marinas | e936771 | 2010-07-28 22:00:54 +0100 | [diff] [blame] | 220 | |
| 221 | #define writeb_relaxed(v,c) ((void)__raw_writeb(v,__mem_pci(c))) |
| 222 | #define writew_relaxed(v,c) ((void)__raw_writew((__force u16) \ |
| 223 | cpu_to_le16(v),__mem_pci(c))) |
| 224 | #define writel_relaxed(v,c) ((void)__raw_writel((__force u32) \ |
| 225 | cpu_to_le32(v),__mem_pci(c))) |
| 226 | |
Russell King | b92b361 | 2010-07-29 11:38:05 +0100 | [diff] [blame] | 227 | #define readb(c) ({ u8 __v = readb_relaxed(c); __iormb(); __v; }) |
| 228 | #define readw(c) ({ u16 __v = readw_relaxed(c); __iormb(); __v; }) |
| 229 | #define readl(c) ({ u32 __v = readl_relaxed(c); __iormb(); __v; }) |
| 230 | |
| 231 | #define writeb(v,c) ({ __iowmb(); writeb_relaxed(v,c); }) |
| 232 | #define writew(v,c) ({ __iowmb(); writew_relaxed(v,c); }) |
| 233 | #define writel(v,c) ({ __iowmb(); writel_relaxed(v,c); }) |
| 234 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | #define readsb(p,d,l) __raw_readsb(__mem_pci(p),d,l) |
| 236 | #define readsw(p,d,l) __raw_readsw(__mem_pci(p),d,l) |
| 237 | #define readsl(p,d,l) __raw_readsl(__mem_pci(p),d,l) |
| 238 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | #define writesb(p,d,l) __raw_writesb(__mem_pci(p),d,l) |
| 240 | #define writesw(p,d,l) __raw_writesw(__mem_pci(p),d,l) |
| 241 | #define writesl(p,d,l) __raw_writesl(__mem_pci(p),d,l) |
| 242 | |
| 243 | #define memset_io(c,v,l) _memset_io(__mem_pci(c),(v),(l)) |
| 244 | #define memcpy_fromio(a,c,l) _memcpy_fromio((a),__mem_pci(c),(l)) |
| 245 | #define memcpy_toio(c,a,l) _memcpy_toio(__mem_pci(c),(a),(l)) |
| 246 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | #elif !defined(readb) |
| 248 | |
| 249 | #define readb(c) (__readwrite_bug("readb"),0) |
| 250 | #define readw(c) (__readwrite_bug("readw"),0) |
| 251 | #define readl(c) (__readwrite_bug("readl"),0) |
| 252 | #define writeb(v,c) __readwrite_bug("writeb") |
| 253 | #define writew(v,c) __readwrite_bug("writew") |
| 254 | #define writel(v,c) __readwrite_bug("writel") |
| 255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | #define check_signature(io,sig,len) (0) |
| 257 | |
| 258 | #endif /* __mem_pci */ |
| 259 | |
| 260 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | * ioremap and friends. |
| 262 | * |
| 263 | * ioremap takes a PCI memory address, as specified in |
Paul Bolle | 395cf96 | 2011-08-15 02:02:26 +0200 | [diff] [blame] | 264 | * Documentation/io-mapping.txt. |
Deepak Saxena | 9d4ae72 | 2006-01-09 19:23:11 +0000 | [diff] [blame] | 265 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | #ifndef __arch_ioremap |
Russell King | 28257f7 | 2010-12-08 13:57:48 +0000 | [diff] [blame] | 268 | #define __arch_ioremap __arm_ioremap |
| 269 | #define __arch_iounmap __iounmap |
| 270 | #endif |
| 271 | |
Russell King | 3603ab2 | 2007-05-05 20:59:27 +0100 | [diff] [blame] | 272 | #define ioremap(cookie,size) __arch_ioremap((cookie), (size), MT_DEVICE) |
| 273 | #define ioremap_nocache(cookie,size) __arch_ioremap((cookie), (size), MT_DEVICE) |
| 274 | #define ioremap_cached(cookie,size) __arch_ioremap((cookie), (size), MT_DEVICE_CACHED) |
Lennert Buytenhek | 1ad77a8 | 2008-09-05 13:17:11 +0100 | [diff] [blame] | 275 | #define ioremap_wc(cookie,size) __arch_ioremap((cookie), (size), MT_DEVICE_WC) |
Russell King | a0b7bd0 | 2010-12-08 13:49:04 +0000 | [diff] [blame] | 276 | #define iounmap __arch_iounmap |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | |
| 278 | /* |
Russell King | 09f0551 | 2005-06-20 18:44:37 +0100 | [diff] [blame] | 279 | * io{read,write}{8,16,32} macros |
| 280 | */ |
Lennert Buytenhek | 7533fca | 2005-06-24 23:11:31 +0100 | [diff] [blame] | 281 | #ifndef ioread8 |
Russell King | b92b361 | 2010-07-29 11:38:05 +0100 | [diff] [blame] | 282 | #define ioread8(p) ({ unsigned int __v = __raw_readb(p); __iormb(); __v; }) |
| 283 | #define ioread16(p) ({ unsigned int __v = le16_to_cpu((__force __le16)__raw_readw(p)); __iormb(); __v; }) |
| 284 | #define ioread32(p) ({ unsigned int __v = le32_to_cpu((__force __le32)__raw_readl(p)); __iormb(); __v; }) |
Russell King | 09f0551 | 2005-06-20 18:44:37 +0100 | [diff] [blame] | 285 | |
Arnd Bergmann | 06901bd | 2011-09-03 17:54:44 +0200 | [diff] [blame] | 286 | #define ioread16be(p) ({ unsigned int __v = be16_to_cpu((__force __be16)__raw_readw(p)); __iormb(); __v; }) |
| 287 | #define ioread32be(p) ({ unsigned int __v = be32_to_cpu((__force __be32)__raw_readl(p)); __iormb(); __v; }) |
| 288 | |
Russell King | b92b361 | 2010-07-29 11:38:05 +0100 | [diff] [blame] | 289 | #define iowrite8(v,p) ({ __iowmb(); (void)__raw_writeb(v, p); }) |
| 290 | #define iowrite16(v,p) ({ __iowmb(); (void)__raw_writew((__force __u16)cpu_to_le16(v), p); }) |
| 291 | #define iowrite32(v,p) ({ __iowmb(); (void)__raw_writel((__force __u32)cpu_to_le32(v), p); }) |
Russell King | 09f0551 | 2005-06-20 18:44:37 +0100 | [diff] [blame] | 292 | |
Arnd Bergmann | 06901bd | 2011-09-03 17:54:44 +0200 | [diff] [blame] | 293 | #define iowrite16be(v,p) ({ __iowmb(); (void)__raw_writew((__force __u16)cpu_to_be16(v), p); }) |
| 294 | #define iowrite32be(v,p) ({ __iowmb(); (void)__raw_writel((__force __u32)cpu_to_be32(v), p); }) |
| 295 | |
Russell King | 09f0551 | 2005-06-20 18:44:37 +0100 | [diff] [blame] | 296 | #define ioread8_rep(p,d,c) __raw_readsb(p,d,c) |
| 297 | #define ioread16_rep(p,d,c) __raw_readsw(p,d,c) |
| 298 | #define ioread32_rep(p,d,c) __raw_readsl(p,d,c) |
| 299 | |
| 300 | #define iowrite8_rep(p,s,c) __raw_writesb(p,s,c) |
| 301 | #define iowrite16_rep(p,s,c) __raw_writesw(p,s,c) |
| 302 | #define iowrite32_rep(p,s,c) __raw_writesl(p,s,c) |
| 303 | |
| 304 | extern void __iomem *ioport_map(unsigned long port, unsigned int nr); |
| 305 | extern void ioport_unmap(void __iomem *addr); |
Lennert Buytenhek | 7533fca | 2005-06-24 23:11:31 +0100 | [diff] [blame] | 306 | #endif |
Russell King | 09f0551 | 2005-06-20 18:44:37 +0100 | [diff] [blame] | 307 | |
| 308 | struct pci_dev; |
| 309 | |
Russell King | 09f0551 | 2005-06-20 18:44:37 +0100 | [diff] [blame] | 310 | extern void pci_iounmap(struct pci_dev *dev, void __iomem *addr); |
| 311 | |
| 312 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | * can the hardware map this into one segment or not, given no other |
| 314 | * constraints. |
| 315 | */ |
| 316 | #define BIOVEC_MERGEABLE(vec1, vec2) \ |
| 317 | ((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2))) |
| 318 | |
Greg Ungerer | 95ba71f | 2007-05-17 06:22:41 +0100 | [diff] [blame] | 319 | #ifdef CONFIG_MMU |
Lennert Buytenhek | 51635ad | 2006-09-16 10:50:22 +0100 | [diff] [blame] | 320 | #define ARCH_HAS_VALID_PHYS_ADDR_RANGE |
| 321 | extern int valid_phys_addr_range(unsigned long addr, size_t size); |
| 322 | extern int valid_mmap_phys_addr_range(unsigned long pfn, size_t size); |
Nicolas Pitre | 087aaff | 2010-09-22 18:34:36 -0400 | [diff] [blame] | 323 | extern int devmem_is_allowed(unsigned long pfn); |
Greg Ungerer | 95ba71f | 2007-05-17 06:22:41 +0100 | [diff] [blame] | 324 | #endif |
Lennert Buytenhek | 51635ad | 2006-09-16 10:50:22 +0100 | [diff] [blame] | 325 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | /* |
| 327 | * Convert a physical pointer to a virtual kernel pointer for /dev/mem |
| 328 | * access |
| 329 | */ |
| 330 | #define xlate_dev_mem_ptr(p) __va(p) |
| 331 | |
| 332 | /* |
| 333 | * Convert a virtual cached pointer to an uncached pointer |
| 334 | */ |
| 335 | #define xlate_dev_kmem_ptr(p) p |
| 336 | |
Russell King | 1645f20 | 2006-08-28 12:45:16 +0100 | [diff] [blame] | 337 | /* |
| 338 | * Register ISA memory and port locations for glibc iopl/inb/outb |
| 339 | * emulation. |
| 340 | */ |
| 341 | extern void register_isa_ports(unsigned int mmio, unsigned int io, |
| 342 | unsigned int io_shift); |
| 343 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | #endif /* __KERNEL__ */ |
| 345 | #endif /* __ASM_ARM_IO_H */ |