Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/include/asm-arm/io.h |
| 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> |
| 29 | #include <asm/arch/hardware.h> |
| 30 | |
| 31 | /* |
| 32 | * ISA I/O bus memory addresses are 1:1 with the physical address. |
| 33 | */ |
| 34 | #define isa_virt_to_bus virt_to_phys |
| 35 | #define isa_page_to_bus page_to_phys |
| 36 | #define isa_bus_to_virt phys_to_virt |
| 37 | |
| 38 | /* |
| 39 | * Generic IO read/write. These perform native-endian accesses. Note |
| 40 | * that some architectures will want to re-define __raw_{read,write}w. |
| 41 | */ |
| 42 | extern void __raw_writesb(void __iomem *addr, const void *data, int bytelen); |
| 43 | extern void __raw_writesw(void __iomem *addr, const void *data, int wordlen); |
| 44 | extern void __raw_writesl(void __iomem *addr, const void *data, int longlen); |
| 45 | |
| 46 | extern void __raw_readsb(void __iomem *addr, void *data, int bytelen); |
| 47 | extern void __raw_readsw(void __iomem *addr, void *data, int wordlen); |
| 48 | extern void __raw_readsl(void __iomem *addr, void *data, int longlen); |
| 49 | |
| 50 | #define __raw_writeb(v,a) (__chk_io_ptr(a), *(volatile unsigned char __force *)(a) = (v)) |
| 51 | #define __raw_writew(v,a) (__chk_io_ptr(a), *(volatile unsigned short __force *)(a) = (v)) |
| 52 | #define __raw_writel(v,a) (__chk_io_ptr(a), *(volatile unsigned int __force *)(a) = (v)) |
| 53 | |
| 54 | #define __raw_readb(a) (__chk_io_ptr(a), *(volatile unsigned char __force *)(a)) |
| 55 | #define __raw_readw(a) (__chk_io_ptr(a), *(volatile unsigned short __force *)(a)) |
| 56 | #define __raw_readl(a) (__chk_io_ptr(a), *(volatile unsigned int __force *)(a)) |
| 57 | |
| 58 | /* |
| 59 | * Bad read/write accesses... |
| 60 | */ |
| 61 | extern void __readwrite_bug(const char *fn); |
| 62 | |
| 63 | /* |
| 64 | * Now, pick up the machine-defined IO definitions |
| 65 | */ |
| 66 | #include <asm/arch/io.h> |
| 67 | |
| 68 | #ifdef __io_pci |
| 69 | #warning machine class uses buggy __io_pci |
| 70 | #endif |
| 71 | #if defined(__arch_putb) || defined(__arch_putw) || defined(__arch_putl) || \ |
| 72 | defined(__arch_getb) || defined(__arch_getw) || defined(__arch_getl) |
| 73 | #warning machine class uses old __arch_putw or __arch_getw |
| 74 | #endif |
| 75 | |
| 76 | /* |
| 77 | * IO port access primitives |
| 78 | * ------------------------- |
| 79 | * |
| 80 | * The ARM doesn't have special IO access instructions; all IO is memory |
| 81 | * mapped. Note that these are defined to perform little endian accesses |
| 82 | * only. Their primary purpose is to access PCI and ISA peripherals. |
| 83 | * |
| 84 | * Note that for a big endian machine, this implies that the following |
Russell King | c79ebfa | 2005-06-27 14:23:38 +0100 | [diff] [blame] | 85 | * big endian mode connectivity is in place, as described by numerous |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | * ARM documents: |
| 87 | * |
| 88 | * PCI: D0-D7 D8-D15 D16-D23 D24-D31 |
| 89 | * ARM: D24-D31 D16-D23 D8-D15 D0-D7 |
| 90 | * |
| 91 | * The machine specific io.h include defines __io to translate an "IO" |
| 92 | * address to a memory address. |
| 93 | * |
| 94 | * Note that we prevent GCC re-ordering or caching values in expressions |
| 95 | * by introducing sequence points into the in*() definitions. Note that |
| 96 | * __raw_* do not guarantee this behaviour. |
| 97 | * |
| 98 | * The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space. |
| 99 | */ |
| 100 | #ifdef __io |
| 101 | #define outb(v,p) __raw_writeb(v,__io(p)) |
Olav Kongas | 05f9869 | 2005-04-29 22:08:34 +0100 | [diff] [blame] | 102 | #define outw(v,p) __raw_writew((__force __u16) \ |
| 103 | cpu_to_le16(v),__io(p)) |
| 104 | #define outl(v,p) __raw_writel((__force __u32) \ |
| 105 | cpu_to_le32(v),__io(p)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
Olav Kongas | 05f9869 | 2005-04-29 22:08:34 +0100 | [diff] [blame] | 107 | #define inb(p) ({ __u8 __v = __raw_readb(__io(p)); __v; }) |
| 108 | #define inw(p) ({ __u16 __v = le16_to_cpu((__force __le16) \ |
| 109 | __raw_readw(__io(p))); __v; }) |
| 110 | #define inl(p) ({ __u32 __v = le32_to_cpu((__force __le32) \ |
| 111 | __raw_readl(__io(p))); __v; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
| 113 | #define outsb(p,d,l) __raw_writesb(__io(p),d,l) |
| 114 | #define outsw(p,d,l) __raw_writesw(__io(p),d,l) |
| 115 | #define outsl(p,d,l) __raw_writesl(__io(p),d,l) |
| 116 | |
| 117 | #define insb(p,d,l) __raw_readsb(__io(p),d,l) |
| 118 | #define insw(p,d,l) __raw_readsw(__io(p),d,l) |
| 119 | #define insl(p,d,l) __raw_readsl(__io(p),d,l) |
| 120 | #endif |
| 121 | |
| 122 | #define outb_p(val,port) outb((val),(port)) |
| 123 | #define outw_p(val,port) outw((val),(port)) |
| 124 | #define outl_p(val,port) outl((val),(port)) |
| 125 | #define inb_p(port) inb((port)) |
| 126 | #define inw_p(port) inw((port)) |
| 127 | #define inl_p(port) inl((port)) |
| 128 | |
| 129 | #define outsb_p(port,from,len) outsb(port,from,len) |
| 130 | #define outsw_p(port,from,len) outsw(port,from,len) |
| 131 | #define outsl_p(port,from,len) outsl(port,from,len) |
| 132 | #define insb_p(port,to,len) insb(port,to,len) |
| 133 | #define insw_p(port,to,len) insw(port,to,len) |
| 134 | #define insl_p(port,to,len) insl(port,to,len) |
| 135 | |
| 136 | /* |
| 137 | * String version of IO memory access ops: |
| 138 | */ |
Russell King | d2f6074 | 2005-09-24 10:42:06 +0100 | [diff] [blame^] | 139 | extern void _memcpy_fromio(void *, const volatile void __iomem *, size_t); |
| 140 | extern void _memcpy_toio(volatile void __iomem *, const void *, size_t); |
| 141 | extern void _memset_io(volatile void __iomem *, int, size_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
| 143 | #define mmiowb() |
| 144 | |
| 145 | /* |
| 146 | * Memory access primitives |
| 147 | * ------------------------ |
| 148 | * |
| 149 | * These perform PCI memory accesses via an ioremap region. They don't |
| 150 | * take an address as such, but a cookie. |
| 151 | * |
| 152 | * Again, this are defined to perform little endian accesses. See the |
| 153 | * IO port primitives for more information. |
| 154 | */ |
| 155 | #ifdef __mem_pci |
Olav Kongas | 05f9869 | 2005-04-29 22:08:34 +0100 | [diff] [blame] | 156 | #define readb(c) ({ __u8 __v = __raw_readb(__mem_pci(c)); __v; }) |
| 157 | #define readw(c) ({ __u16 __v = le16_to_cpu((__force __le16) \ |
| 158 | __raw_readw(__mem_pci(c))); __v; }) |
| 159 | #define readl(c) ({ __u32 __v = le32_to_cpu((__force __le32) \ |
| 160 | __raw_readl(__mem_pci(c))); __v; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | #define readb_relaxed(addr) readb(addr) |
| 162 | #define readw_relaxed(addr) readw(addr) |
| 163 | #define readl_relaxed(addr) readl(addr) |
| 164 | |
| 165 | #define readsb(p,d,l) __raw_readsb(__mem_pci(p),d,l) |
| 166 | #define readsw(p,d,l) __raw_readsw(__mem_pci(p),d,l) |
| 167 | #define readsl(p,d,l) __raw_readsl(__mem_pci(p),d,l) |
| 168 | |
| 169 | #define writeb(v,c) __raw_writeb(v,__mem_pci(c)) |
Olav Kongas | 05f9869 | 2005-04-29 22:08:34 +0100 | [diff] [blame] | 170 | #define writew(v,c) __raw_writew((__force __u16) \ |
| 171 | cpu_to_le16(v),__mem_pci(c)) |
| 172 | #define writel(v,c) __raw_writel((__force __u32) \ |
| 173 | cpu_to_le32(v),__mem_pci(c)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | |
| 175 | #define writesb(p,d,l) __raw_writesb(__mem_pci(p),d,l) |
| 176 | #define writesw(p,d,l) __raw_writesw(__mem_pci(p),d,l) |
| 177 | #define writesl(p,d,l) __raw_writesl(__mem_pci(p),d,l) |
| 178 | |
| 179 | #define memset_io(c,v,l) _memset_io(__mem_pci(c),(v),(l)) |
| 180 | #define memcpy_fromio(a,c,l) _memcpy_fromio((a),__mem_pci(c),(l)) |
| 181 | #define memcpy_toio(c,a,l) _memcpy_toio(__mem_pci(c),(a),(l)) |
| 182 | |
| 183 | #define eth_io_copy_and_sum(s,c,l,b) \ |
| 184 | eth_copy_and_sum((s),__mem_pci(c),(l),(b)) |
| 185 | |
| 186 | static inline int |
| 187 | check_signature(void __iomem *io_addr, const unsigned char *signature, |
| 188 | int length) |
| 189 | { |
| 190 | int retval = 0; |
| 191 | do { |
| 192 | if (readb(io_addr) != *signature) |
| 193 | goto out; |
| 194 | io_addr++; |
| 195 | signature++; |
| 196 | length--; |
| 197 | } while (length); |
| 198 | retval = 1; |
| 199 | out: |
| 200 | return retval; |
| 201 | } |
| 202 | |
| 203 | #elif !defined(readb) |
| 204 | |
| 205 | #define readb(c) (__readwrite_bug("readb"),0) |
| 206 | #define readw(c) (__readwrite_bug("readw"),0) |
| 207 | #define readl(c) (__readwrite_bug("readl"),0) |
| 208 | #define writeb(v,c) __readwrite_bug("writeb") |
| 209 | #define writew(v,c) __readwrite_bug("writew") |
| 210 | #define writel(v,c) __readwrite_bug("writel") |
| 211 | |
| 212 | #define eth_io_copy_and_sum(s,c,l,b) __readwrite_bug("eth_io_copy_and_sum") |
| 213 | |
| 214 | #define check_signature(io,sig,len) (0) |
| 215 | |
| 216 | #endif /* __mem_pci */ |
| 217 | |
| 218 | /* |
| 219 | * If this architecture has ISA IO, then define the isa_read/isa_write |
| 220 | * macros. |
| 221 | */ |
| 222 | #ifdef __mem_isa |
| 223 | |
| 224 | #define isa_readb(addr) __raw_readb(__mem_isa(addr)) |
| 225 | #define isa_readw(addr) __raw_readw(__mem_isa(addr)) |
| 226 | #define isa_readl(addr) __raw_readl(__mem_isa(addr)) |
| 227 | #define isa_writeb(val,addr) __raw_writeb(val,__mem_isa(addr)) |
| 228 | #define isa_writew(val,addr) __raw_writew(val,__mem_isa(addr)) |
| 229 | #define isa_writel(val,addr) __raw_writel(val,__mem_isa(addr)) |
| 230 | #define isa_memset_io(a,b,c) _memset_io(__mem_isa(a),(b),(c)) |
| 231 | #define isa_memcpy_fromio(a,b,c) _memcpy_fromio((a),__mem_isa(b),(c)) |
| 232 | #define isa_memcpy_toio(a,b,c) _memcpy_toio(__mem_isa((a)),(b),(c)) |
| 233 | |
| 234 | #define isa_eth_io_copy_and_sum(a,b,c,d) \ |
| 235 | eth_copy_and_sum((a),__mem_isa(b),(c),(d)) |
| 236 | |
| 237 | #else /* __mem_isa */ |
| 238 | |
| 239 | #define isa_readb(addr) (__readwrite_bug("isa_readb"),0) |
| 240 | #define isa_readw(addr) (__readwrite_bug("isa_readw"),0) |
| 241 | #define isa_readl(addr) (__readwrite_bug("isa_readl"),0) |
| 242 | #define isa_writeb(val,addr) __readwrite_bug("isa_writeb") |
| 243 | #define isa_writew(val,addr) __readwrite_bug("isa_writew") |
| 244 | #define isa_writel(val,addr) __readwrite_bug("isa_writel") |
| 245 | #define isa_memset_io(a,b,c) __readwrite_bug("isa_memset_io") |
| 246 | #define isa_memcpy_fromio(a,b,c) __readwrite_bug("isa_memcpy_fromio") |
| 247 | #define isa_memcpy_toio(a,b,c) __readwrite_bug("isa_memcpy_toio") |
| 248 | |
| 249 | #define isa_eth_io_copy_and_sum(a,b,c,d) \ |
| 250 | __readwrite_bug("isa_eth_io_copy_and_sum") |
| 251 | |
| 252 | #endif /* __mem_isa */ |
| 253 | |
| 254 | /* |
| 255 | * ioremap and friends. |
| 256 | * |
| 257 | * ioremap takes a PCI memory address, as specified in |
| 258 | * Documentation/IO-mapping.txt. |
| 259 | */ |
| 260 | extern void __iomem * __ioremap(unsigned long, size_t, unsigned long, unsigned long); |
| 261 | extern void __iounmap(void __iomem *addr); |
| 262 | |
| 263 | #ifndef __arch_ioremap |
| 264 | #define ioremap(cookie,size) __ioremap(cookie,size,0,1) |
| 265 | #define ioremap_nocache(cookie,size) __ioremap(cookie,size,0,1) |
| 266 | #define ioremap_cached(cookie,size) __ioremap(cookie,size,L_PTE_CACHEABLE,1) |
| 267 | #define iounmap(cookie) __iounmap(cookie) |
| 268 | #else |
| 269 | #define ioremap(cookie,size) __arch_ioremap((cookie),(size),0,1) |
| 270 | #define ioremap_nocache(cookie,size) __arch_ioremap((cookie),(size),0,1) |
| 271 | #define ioremap_cached(cookie,size) __arch_ioremap((cookie),(size),L_PTE_CACHEABLE,1) |
| 272 | #define iounmap(cookie) __arch_iounmap(cookie) |
| 273 | #endif |
| 274 | |
| 275 | /* |
Russell King | 09f0551 | 2005-06-20 18:44:37 +0100 | [diff] [blame] | 276 | * io{read,write}{8,16,32} macros |
| 277 | */ |
Lennert Buytenhek | 7533fca | 2005-06-24 23:11:31 +0100 | [diff] [blame] | 278 | #ifndef ioread8 |
Russell King | 09f0551 | 2005-06-20 18:44:37 +0100 | [diff] [blame] | 279 | #define ioread8(p) ({ unsigned int __v = __raw_readb(p); __v; }) |
| 280 | #define ioread16(p) ({ unsigned int __v = le16_to_cpu(__raw_readw(p)); __v; }) |
| 281 | #define ioread32(p) ({ unsigned int __v = le32_to_cpu(__raw_readl(p)); __v; }) |
| 282 | |
| 283 | #define iowrite8(v,p) __raw_writeb(v, p) |
| 284 | #define iowrite16(v,p) __raw_writew(cpu_to_le16(v), p) |
| 285 | #define iowrite32(v,p) __raw_writel(cpu_to_le32(v), p) |
| 286 | |
| 287 | #define ioread8_rep(p,d,c) __raw_readsb(p,d,c) |
| 288 | #define ioread16_rep(p,d,c) __raw_readsw(p,d,c) |
| 289 | #define ioread32_rep(p,d,c) __raw_readsl(p,d,c) |
| 290 | |
| 291 | #define iowrite8_rep(p,s,c) __raw_writesb(p,s,c) |
| 292 | #define iowrite16_rep(p,s,c) __raw_writesw(p,s,c) |
| 293 | #define iowrite32_rep(p,s,c) __raw_writesl(p,s,c) |
| 294 | |
| 295 | extern void __iomem *ioport_map(unsigned long port, unsigned int nr); |
| 296 | extern void ioport_unmap(void __iomem *addr); |
Lennert Buytenhek | 7533fca | 2005-06-24 23:11:31 +0100 | [diff] [blame] | 297 | #endif |
Russell King | 09f0551 | 2005-06-20 18:44:37 +0100 | [diff] [blame] | 298 | |
| 299 | struct pci_dev; |
| 300 | |
| 301 | extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen); |
| 302 | extern void pci_iounmap(struct pci_dev *dev, void __iomem *addr); |
| 303 | |
| 304 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | * can the hardware map this into one segment or not, given no other |
| 306 | * constraints. |
| 307 | */ |
| 308 | #define BIOVEC_MERGEABLE(vec1, vec2) \ |
| 309 | ((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2))) |
| 310 | |
| 311 | /* |
| 312 | * Convert a physical pointer to a virtual kernel pointer for /dev/mem |
| 313 | * access |
| 314 | */ |
| 315 | #define xlate_dev_mem_ptr(p) __va(p) |
| 316 | |
| 317 | /* |
| 318 | * Convert a virtual cached pointer to an uncached pointer |
| 319 | */ |
| 320 | #define xlate_dev_kmem_ptr(p) p |
| 321 | |
| 322 | #endif /* __KERNEL__ */ |
| 323 | #endif /* __ASM_ARM_IO_H */ |