arch/microblaze/include/asm/io.h

   1 /*
   2  * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
   3  * Copyright (C) 2007-2009 PetaLogix
   4  * Copyright (C) 2006 Atmark Techno, Inc.
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License. See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  */
  10
  11 #ifndef _ASM_MICROBLAZE_IO_H
  12 #define _ASM_MICROBLAZE_IO_H
  13
  14 #include <asm/byteorder.h>
  15 #include <asm/page.h>
  16 #include <linux/types.h>
  17 #include <linux/mm.h>          /* Get struct page {...} */
  18 #include <asm-generic/iomap.h>
  19
  20 #ifndef CONFIG_PCI
  21 #define _IO_BASE        0
  22 #define _ISA_MEM_BASE   0
  23 #define PCI_DRAM_OFFSET 0
  24 #else
  25 #define _IO_BASE        isa_io_base
  26 #define _ISA_MEM_BASE   isa_mem_base
  27 #define PCI_DRAM_OFFSET pci_dram_offset
  28 #endif
  29
  30 extern unsigned long isa_io_base;
  31 extern unsigned long pci_io_base;
  32 extern unsigned long pci_dram_offset;
  33
  34 extern resource_size_t isa_mem_base;
  35
  36 #define IO_SPACE_LIMIT (0xFFFFFFFF)
  37
  38 /* the following is needed to support PCI with some drivers */
  39
  40 #define mmiowb()
  41
  42 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
  43 {
  44         return *(volatile unsigned char __force *)addr;
  45 }
  46 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
  47 {
  48         return *(volatile unsigned short __force *)addr;
  49 }
  50 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
  51 {
  52         return *(volatile unsigned int __force *)addr;
  53 }
  54 static inline unsigned long __raw_readq(const volatile void __iomem *addr)
  55 {
  56         return *(volatile unsigned long __force *)addr;
  57 }
  58 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
  59 {
  60         *(volatile unsigned char __force *)addr = v;
  61 }
  62 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
  63 {
  64         *(volatile unsigned short __force *)addr = v;
  65 }
  66 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
  67 {
  68         *(volatile unsigned int __force *)addr = v;
  69 }
  70 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
  71 {
  72         *(volatile unsigned long __force *)addr = v;
  73 }
  74
  75 /*
  76  * read (readb, readw, readl, readq) and write (writeb, writew,
  77  * writel, writeq) accessors are for PCI and thus little endian.
  78  * Linux 2.4 for Microblaze had this wrong.
  79  */
  80 static inline unsigned char readb(const volatile void __iomem *addr)
  81 {
  82         return *(volatile unsigned char __force *)addr;
  83 }
  84 static inline unsigned short readw(const volatile void __iomem *addr)
  85 {
  86         return le16_to_cpu(*(volatile unsigned short __force *)addr);
  87 }
  88 static inline unsigned int readl(const volatile void __iomem *addr)
  89 {
  90         return le32_to_cpu(*(volatile unsigned int __force *)addr);
  91 }
  92 #define readq readq
  93 static inline u64 readq(const volatile void __iomem *addr)
  94 {
  95         return le64_to_cpu(__raw_readq(addr));
  96 }
  97 static inline void writeb(unsigned char v, volatile void __iomem *addr)
  98 {
  99         *(volatile unsigned char __force *)addr = v;
 100 }
 101 static inline void writew(unsigned short v, volatile void __iomem *addr)
 102 {
 103         *(volatile unsigned short __force *)addr = cpu_to_le16(v);
 104 }
 105 static inline void writel(unsigned int v, volatile void __iomem *addr)
 106 {
 107         *(volatile unsigned int __force *)addr = cpu_to_le32(v);
 108 }
 109 #define writeq(b, addr) __raw_writeq(cpu_to_le64(b), addr)
 110
 111 /* ioread and iowrite variants. thease are for now same as __raw_
 112  * variants of accessors. we might check for endianess in the feature
 113  */
 114 #define ioread8(addr)           __raw_readb((u8 *)(addr))
 115 #define ioread16(addr)          __raw_readw((u16 *)(addr))
 116 #define ioread32(addr)          __raw_readl((u32 *)(addr))
 117 #define iowrite8(v, addr)       __raw_writeb((u8)(v), (u8 *)(addr))
 118 #define iowrite16(v, addr)      __raw_writew((u16)(v), (u16 *)(addr))
 119 #define iowrite32(v, addr)      __raw_writel((u32)(v), (u32 *)(addr))
 120
 121 #define ioread16be(addr)        __raw_readw((u16 *)(addr))
 122 #define ioread32be(addr)        __raw_readl((u32 *)(addr))
 123 #define iowrite16be(v, addr)    __raw_writew((u16)(v), (u16 *)(addr))
 124 #define iowrite32be(v, addr)    __raw_writel((u32)(v), (u32 *)(addr))
 125
 126 /* These are the definitions for the x86 IO instructions
 127  * inb/inw/inl/outb/outw/outl, the "string" versions
 128  * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions
 129  * inb_p/inw_p/...
 130  * The macros don't do byte-swapping.
 131  */
 132 #define inb(port)               readb((u8 *)((unsigned long)(port)))
 133 #define outb(val, port)         writeb((val), (u8 *)((unsigned long)(port)))
 134 #define inw(port)               readw((u16 *)((unsigned long)(port)))
 135 #define outw(val, port)         writew((val), (u16 *)((unsigned long)(port)))
 136 #define inl(port)               readl((u32 *)((unsigned long)(port)))
 137 #define outl(val, port)         writel((val), (u32 *)((unsigned long)(port)))
 138
 139 #define inb_p(port)             inb((port))
 140 #define outb_p(val, port)       outb((val), (port))
 141 #define inw_p(port)             inw((port))
 142 #define outw_p(val, port)       outw((val), (port))
 143 #define inl_p(port)             inl((port))
 144 #define outl_p(val, port)       outl((val), (port))
 145
 146 #define memset_io(a, b, c)      memset((void *)(a), (b), (c))
 147 #define memcpy_fromio(a, b, c)  memcpy((a), (void *)(b), (c))
 148 #define memcpy_toio(a, b, c)    memcpy((void *)(a), (b), (c))
 149
 150 #ifdef CONFIG_MMU
 151
 152 #define phys_to_virt(addr)      ((void *)__phys_to_virt(addr))
 153 #define virt_to_phys(addr)      ((unsigned long)__virt_to_phys(addr))
 154 #define virt_to_bus(addr)       ((unsigned long)__virt_to_phys(addr))
 155
 156 #define page_to_bus(page)       (page_to_phys(page))
 157 #define bus_to_virt(addr)       (phys_to_virt(addr))
 158
 159 extern void iounmap(void __iomem *addr);
 160 /*extern void *__ioremap(phys_addr_t address, unsigned long size,
 161                 unsigned long flags);*/
 162 extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
 163 #define ioremap_writethrough(addr, size) ioremap((addr), (size))
 164 #define ioremap_nocache(addr, size)      ioremap((addr), (size))
 165 #define ioremap_fullcache(addr, size)    ioremap((addr), (size))
 166
 167 #else /* CONFIG_MMU */
 168
 169 /**
 170  *      virt_to_phys - map virtual addresses to physical
 171  *      @address: address to remap
 172  *
 173  *      The returned physical address is the physical (CPU) mapping for
 174  *      the memory address given. It is only valid to use this function on
 175  *      addresses directly mapped or allocated via kmalloc.
 176  *
 177  *      This function does not give bus mappings for DMA transfers. In
 178  *      almost all conceivable cases a device driver should not be using
 179  *      this function
 180  */
 181 static inline unsigned long __iomem virt_to_phys(volatile void *address)
 182 {
 183         return __pa((unsigned long)address);
 184 }
 185
 186 #define virt_to_bus virt_to_phys
 187
 188 /**
 189  *      phys_to_virt - map physical address to virtual
 190  *      @address: address to remap
 191  *
 192  *      The returned virtual address is a current CPU mapping for
 193  *      the memory address given. It is only valid to use this function on
 194  *      addresses that have a kernel mapping
 195  *
 196  *      This function does not handle bus mappings for DMA transfers. In
 197  *      almost all conceivable cases a device driver should not be using
 198  *      this function
 199  */
 200 static inline void *phys_to_virt(unsigned long address)
 201 {
 202         return (void *)__va(address);
 203 }
 204
 205 #define bus_to_virt(a) phys_to_virt(a)
 206
 207 static inline void __iomem *__ioremap(phys_addr_t address, unsigned long size,
 208                         unsigned long flags)
 209 {
 210         return (void *)address;
 211 }
 212
 213 #define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr))
 214 #define iounmap(addr)           ((void)0)
 215 #define ioremap_nocache(physaddr, size) ioremap(physaddr, size)
 216
 217 #endif /* CONFIG_MMU */
 218
 219 /*
 220  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 221  * access
 222  */
 223 #define xlate_dev_mem_ptr(p)    __va(p)
 224
 225 /*
 226  * Convert a virtual cached pointer to an uncached pointer
 227  */
 228 #define xlate_dev_kmem_ptr(p)   p
 229
 230 /*
 231  * Big Endian
 232  */
 233 #define out_be32(a, v) __raw_writel((v), (void __iomem __force *)(a))
 234 #define out_be16(a, v) __raw_writew((v), (a))
 235
 236 #define in_be32(a) __raw_readl((const void __iomem __force *)(a))
 237 #define in_be16(a) __raw_readw(a)
 238
 239 #define writel_be(v, a) out_be32((__force unsigned *)a, v)
 240 #define readl_be(a)     in_be32((__force unsigned *)a)
 241
 242 /*
 243  * Little endian
 244  */
 245
 246 #define out_le32(a, v) __raw_writel(__cpu_to_le32(v), (a))
 247 #define out_le16(a, v) __raw_writew(__cpu_to_le16(v), (a))
 248
 249 #define in_le32(a) __le32_to_cpu(__raw_readl(a))
 250 #define in_le16(a) __le16_to_cpu(__raw_readw(a))
 251
 252 /* Byte ops */
 253 #define out_8(a, v) __raw_writeb((v), (a))
 254 #define in_8(a) __raw_readb(a)
 255
 256 #define mmiowb()
 257
 258 #define ioport_map(port, nr)    ((void __iomem *)(port))
 259 #define ioport_unmap(addr)
 260
 261 /* from asm-generic/io.h */
 262 #ifndef insb
 263 static inline void insb(unsigned long addr, void *buffer, int count)
 264 {
 265         if (count) {
 266                 u8 *buf = buffer;
 267                 do {
 268                         u8 x = inb(addr);
 269                         *buf++ = x;
 270                 } while (--count);
 271         }
 272 }
 273 #endif
 274
 275 #ifndef insw
 276 static inline void insw(unsigned long addr, void *buffer, int count)
 277 {
 278         if (count) {
 279                 u16 *buf = buffer;
 280                 do {
 281                         u16 x = inw(addr);
 282                         *buf++ = x;
 283                 } while (--count);
 284         }
 285 }
 286 #endif
 287
 288 #ifndef insl
 289 static inline void insl(unsigned long addr, void *buffer, int count)
 290 {
 291         if (count) {
 292                 u32 *buf = buffer;
 293                 do {
 294                         u32 x = inl(addr);
 295                         *buf++ = x;
 296                 } while (--count);
 297         }
 298 }
 299 #endif
 300
 301 #ifndef outsb
 302 static inline void outsb(unsigned long addr, const void *buffer, int count)
 303 {
 304         if (count) {
 305                 const u8 *buf = buffer;
 306                 do {
 307                         outb(*buf++, addr);
 308                 } while (--count);
 309         }
 310 }
 311 #endif
 312
 313 #ifndef outsw
 314 static inline void outsw(unsigned long addr, const void *buffer, int count)
 315 {
 316         if (count) {
 317                 const u16 *buf = buffer;
 318                 do {
 319                         outw(*buf++, addr);
 320                 } while (--count);
 321         }
 322 }
 323 #endif
 324
 325 #ifndef outsl
 326 static inline void outsl(unsigned long addr, const void *buffer, int count)
 327 {
 328         if (count) {
 329                 const u32 *buf = buffer;
 330                 do {
 331                         outl(*buf++, addr);
 332                 } while (--count);
 333         }
 334 }
 335 #endif
 336
 337 #define ioread8_rep(p, dst, count) \
 338         insb((unsigned long) (p), (dst), (count))
 339 #define ioread16_rep(p, dst, count) \
 340         insw((unsigned long) (p), (dst), (count))
 341 #define ioread32_rep(p, dst, count) \
 342         insl((unsigned long) (p), (dst), (count))
 343
 344 #define iowrite8_rep(p, src, count) \
 345         outsb((unsigned long) (p), (src), (count))
 346 #define iowrite16_rep(p, src, count) \
 347         outsw((unsigned long) (p), (src), (count))
 348 #define iowrite32_rep(p, src, count) \
 349         outsl((unsigned long) (p), (src), (count))
 350
 351 #define readb_relaxed   readb
 352 #define readw_relaxed   readw
 353 #define readl_relaxed   readl
 354
 355 #define writeb_relaxed  writeb
 356 #define writew_relaxed  writew
 357 #define writel_relaxed  writel
 358
 359 #endif /* _ASM_MICROBLAZE_IO_H */